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Message-ID: <1288699725-14405-1-git-send-email-naveen.gaddipati@stericsson.com>
Date: Tue, 2 Nov 2010 17:38:45 +0530
From: Naveen Kumar G <naveen.gaddipati@...ricsson.com>
To: <greg@...ah.com>
Cc: <linux-kernel@...r.kernel.org>,
<STEricsson_nomadik_linux@...t.st.com>,
Naveen Kumar Gaddipati <naveen.gaddipati@...ricsson.com>
Subject: [PATCHv1] staging: Synaptics RMI4 touchpad driver support
From: Naveen Kumar Gaddipati <naveen.gaddipati@...ricsson.com>
Added the Synaptics RMI4 touchpad driver support.
Acked-by: Linus Walleij <linus.walleij@...ricsson.com>
Signed-off-by: Naveen Kumar Gaddipati <naveen.gaddipati@...ricsson.com>
---
drivers/staging/Kconfig | 2 +
drivers/staging/Makefile | 1 +
drivers/staging/ste_rmi4/Kconfig | 9 +
drivers/staging/ste_rmi4/Makefile | 4 +
drivers/staging/ste_rmi4/TODO | 7 +
drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c | 1179 +++++++++++++++++++++++++
include/linux/input/synaptics_i2c_rmi4.h | 50 +
7 files changed, 1252 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/ste_rmi4/Kconfig
create mode 100644 drivers/staging/ste_rmi4/Makefile
create mode 100644 drivers/staging/ste_rmi4/TODO
create mode 100644 drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
create mode 100644 include/linux/input/synaptics_i2c_rmi4.h
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index f9c9c8a..90fb817 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -177,5 +177,7 @@ source "drivers/staging/intel_sst/Kconfig"
source "drivers/staging/speakup/Kconfig"
+source "drivers/staging/ste_rmi4/Kconfig"
+
endif # !STAGING_EXCLUDE_BUILD
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index a85074f..2cccede 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -69,3 +69,4 @@ obj-$(CONFIG_BCM_WIMAX) += bcm/
obj-$(CONFIG_FT1000) += ft1000/
obj-$(CONFIG_SND_INTEL_SST) += intel_sst/
obj-$(CONFIG_SPEAKUP) += speakup/
+obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4) += ste_rmi4/
diff --git a/drivers/staging/ste_rmi4/Kconfig b/drivers/staging/ste_rmi4/Kconfig
new file mode 100644
index 0000000..95fd5a9
--- /dev/null
+++ b/drivers/staging/ste_rmi4/Kconfig
@@ -0,0 +1,9 @@
+config TOUCHSCREEN_SYNAPTICS_I2C_RMI4
+ tristate "Synaptics i2c rmi4 touchscreen"
+ depends on I2C
+ help
+ Say Y here if you have a Synaptics RMI4 and
+ want to enable support for the built-in touchscreen.
+
+ To compile this driver as a module, choose M here: the
+ module will be called synaptics_rmi4_ts.
diff --git a/drivers/staging/ste_rmi4/Makefile b/drivers/staging/ste_rmi4/Makefile
new file mode 100644
index 0000000..6cce2ed
--- /dev/null
+++ b/drivers/staging/ste_rmi4/Makefile
@@ -0,0 +1,4 @@
+#
+# Makefile for the RMI4 touchscreen driver.
+#
+obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4) += synaptics_i2c_rmi4.o
diff --git a/drivers/staging/ste_rmi4/TODO b/drivers/staging/ste_rmi4/TODO
new file mode 100644
index 0000000..9be2437
--- /dev/null
+++ b/drivers/staging/ste_rmi4/TODO
@@ -0,0 +1,7 @@
+TODO
+----
+
+Wait for the official upstream synaptics rmi4 clearpad drivers as promised over the past few months
+Merge any device support needed from this driver into it
+Delete this driver
+
diff --git a/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
new file mode 100644
index 0000000..f17eeba
--- /dev/null
+++ b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
@@ -0,0 +1,1179 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver.
+ * Copyright (c) 2007-2010, Synaptics Incorporated
+ *
+ * Author: Js HA <js.ha@...ricsson.com> for ST-Ericsson
+ * Author: Naveen Kumar G <naveen.gaddipati@...ricsson.com> for ST-Ericsson
+ * Copyright 2010 (c) ST-Ericsson AB
+ */
+/*
+ * This file is licensed under the GPL2 license.
+ *
+ *#############################################################################
+ * GPL
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * 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.
+ *
+ *#############################################################################
+ */
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/regulator/consumer.h>
+#include <linux/input/synaptics_i2c_rmi4.h>
+
+/* TODO: for multiple device support will need a per-device mutex */
+#define DRIVER_NAME "synaptics_rmi4_i2c"
+
+#define MAX_ERROR_REPORT 6
+#define MAX_TOUCH_MAJOR 15
+#define MAX_RETRY_COUNT 5
+#define STD_QUERY_LEN 21
+#define PAGE_LEN 2
+#define DATA_BUF_LEN 32
+#define BUF_LEN 37
+#define QUERY_LEN 9
+#define DATA_LEN 12
+#define HAS_TAP 0x01
+#define HAS_PALMDETECT 0x01
+#define HAS_ROTATE 0x02
+#define HAS_TAPANDHOLD 0x02
+#define HAS_DOUBLETAP 0x04
+#define HAS_EARLYTAP 0x08
+#define HAS_RELEASE 0x08
+#define HAS_FLICK 0x10
+#define HAS_PRESS 0x20
+#define HAS_PINCH 0x40
+
+#define MASK_16BIT 0xFFFF
+#define MASK_8BIT 0xFF
+#define MASK_7BIT 0x7F
+#define MASK_5BIT 0x1F
+#define MASK_4BIT 0x0F
+#define MASK_3BIT 0x07
+#define MASK_2BIT 0x03
+#define TOUCHPAD_CTRL_INTR 0x8
+#define PDT_START_SCAN_LOCATION (0x00E9)
+#define PDT_END_SCAN_LOCATION (0x000A)
+#define PDT_ENTRY_SIZE (0x0006)
+#define RMI4_NUMBER_OF_MAX_FINGERS (8)
+#define SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM (0x11)
+#define SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM (0x01)
+
+/**
+ * struct synaptics_rmi4_fn_desc - contains the funtion descriptor information
+ * @query_base_addr: base address for query
+ * @cmd_base_addr: base address for command
+ * @ctrl_base_addr: base address for control
+ * @data_base_addr: base address for data
+ * @intr_src_count: count for the interrupt source
+ * @fn_number: function number
+ *
+ * This structure is used to gives the function descriptor information
+ * of the particular functionality.
+ */
+struct synaptics_rmi4_fn_desc {
+ unsigned char query_base_addr;
+ unsigned char cmd_base_addr;
+ unsigned char ctrl_base_addr;
+ unsigned char data_base_addr;
+ unsigned char intr_src_count;
+ unsigned char fn_number;
+};
+
+/**
+ * struct synaptics_rmi4_fn - contains the funtion information
+ * @fn_number: function number
+ * @num_of_data_sources: number of data sources
+ * @num_of_data_points: number of fingers touched
+ * @size_of_data_register_block: data register block size
+ * @index_to_intr_reg: index for interrupt register
+ * @intr_mask: interrupt mask value
+ * @fn_desc: variable for function descriptor structure
+ * @link: linked list for function descriptors
+ *
+ * This structure gives information about the number of data sources and
+ * the number of data registers associated with the function.
+ */
+struct synaptics_rmi4_fn {
+ unsigned char fn_number;
+ unsigned char num_of_data_sources;
+ unsigned char num_of_data_points;
+ unsigned char size_of_data_register_block;
+ unsigned char index_to_intr_reg;
+ unsigned char intr_mask;
+ struct synaptics_rmi4_fn_desc fn_desc;
+ struct list_head link;
+};
+
+/**
+ * struct synaptics_rmi4_device_info - contains the rmi4 device information
+ * @version_major: protocol major version number
+ * @version_minor: protocol minor version number
+ * @manufacturer_id: manufacturer identification byte
+ * @product_props: product properties information
+ * @product_info: product info array
+ * @date_code: device manufacture date
+ * @tester_id: tester id array
+ * @serial_number: serial number for that device
+ * @product_id_string: product id for the device
+ * @support_fn_list: linked list for device information
+ *
+ * This structure gives information about the number of data sources and
+ * the number of data registers associated with the function.
+ */
+struct synaptics_rmi4_device_info {
+ unsigned int version_major;
+ unsigned int version_minor;
+ unsigned char manufacturer_id;
+ unsigned char product_props;
+ unsigned char product_info[2];
+ unsigned char date_code[3];
+ unsigned short tester_id;
+ unsigned short serial_number;
+ unsigned char product_id_string[11];
+ struct list_head support_fn_list;
+};
+
+/**
+ * struct synaptics_rmi4_data - contains the rmi4 device data
+ * @rmi4_mod_info: structure variable for rmi4 device info
+ * @input_dev: pointer for input device
+ * @i2c_client: pointer for i2c client
+ * @board: constant pointer for touch platform data
+ * @fn_list_mutex: mutex for funtion list
+ * @rmi4_page_mutex: mutex for rmi4 page
+ * @current_page: variable for integer
+ * @number_of_interrupt_register: interrupt registers count
+ * @fn01_ctrl_base_addr: control base address for fn01
+ * @fn01_query_base_addr: query base address for fn01
+ * @fn01_data_base_addr: data base address for fn01
+ * @sensor_max_x: sensor maximum x value
+ * @sensor_max_y: sensor maximum y value
+ * @regulator: pointer to the regulator structure
+ * @wait: wait queue structure variable
+ * @touch_stopped: flag to stop the thread function
+ *
+ * This structure gives the device data information.
+ */
+struct synaptics_rmi4_data {
+ struct synaptics_rmi4_device_info rmi4_mod_info;
+ struct input_dev *input_dev;
+ struct i2c_client *i2c_client;
+ const struct synaptics_rmi4_platform_data *board;
+ struct mutex fn_list_mutex;
+ struct mutex rmi4_page_mutex;
+ int current_page;
+ unsigned int number_of_interrupt_register;
+ unsigned short fn01_ctrl_base_addr;
+ unsigned short fn01_query_base_addr;
+ unsigned short fn01_data_base_addr;
+ int sensor_max_x;
+ int sensor_max_y;
+ struct regulator *regulator;
+ wait_queue_head_t wait;
+ bool touch_stopped;
+};
+
+/**
+ * synaptics_rmi4_set_page() - sets the page
+ * @pdata: pointer to synaptics_rmi4_data structure
+ * @address: set the address of the page
+ *
+ * This function is used to set the page and returns integer.
+ */
+static int synaptics_rmi4_set_page(struct synaptics_rmi4_data *pdata,
+ unsigned int address)
+{
+ unsigned char txbuf[PAGE_LEN];
+ int retval;
+ unsigned int page;
+ struct i2c_client *i2c = pdata->i2c_client;
+
+ page = ((address >> 8) & MASK_8BIT);
+ if (page != pdata->current_page) {
+ txbuf[0] = MASK_8BIT;
+ txbuf[1] = page;
+ retval = i2c_master_send(i2c, txbuf, PAGE_LEN);
+ if (retval != PAGE_LEN)
+ dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval);
+ else
+ pdata->current_page = page;
+ } else
+ retval = PAGE_LEN;
+ return retval;
+}
+/**
+ * synaptics_rmi4_i2c_block_read() - read the block of data
+ * @pdata: pointer to synaptics_rmi4_data structure
+ * @address: read the block of data from this offset
+ * @valp: pointer to a buffer containing the data to be read
+ * @size: number of bytes to read
+ *
+ * This function is to read the block of data and returns integer.
+ */
+static int synaptics_rmi4_i2c_block_read(struct synaptics_rmi4_data *pdata,
+ unsigned short address,
+ unsigned char *valp, int size)
+{
+ int retval = 0;
+ int retry_count = 0;
+ int index;
+ struct i2c_client *i2c = pdata->i2c_client;
+
+ mutex_lock(&(pdata->rmi4_page_mutex));
+ retval = synaptics_rmi4_set_page(pdata, address);
+ if (retval != PAGE_LEN)
+ goto exit;
+ index = address & MASK_8BIT;
+retry:
+ retval = i2c_smbus_read_i2c_block_data(i2c, index, size, valp);
+ if (retval != size) {
+ if (++retry_count == MAX_RETRY_COUNT)
+ dev_err(&i2c->dev,
+ "%s:address 0x%04x size %d failed:%d\n",
+ __func__, address, size, retval);
+ else {
+ synaptics_rmi4_set_page(pdata, address);
+ goto retry;
+ }
+ }
+exit:
+ mutex_unlock(&(pdata->rmi4_page_mutex));
+ return retval;
+}
+
+/**
+ * synaptics_rmi4_i2c_byte_write() - write the single byte data
+ * @pdata: pointer to synaptics_rmi4_data structure
+ * @address: write the block of data from this offset
+ * @data: data to be write
+ *
+ * This function is to write the single byte data and returns integer.
+ */
+static int synaptics_rmi4_i2c_byte_write(struct synaptics_rmi4_data *pdata,
+ unsigned short address,
+ unsigned char data)
+{
+ unsigned char txbuf[2];
+ int retval = 0;
+ struct i2c_client *i2c = pdata->i2c_client;
+
+ /* Can't have anyone else changing the page behind our backs */
+ mutex_lock(&(pdata->rmi4_page_mutex));
+
+ retval = synaptics_rmi4_set_page(pdata, address);
+ if (retval != PAGE_LEN)
+ goto exit;
+ txbuf[0] = address & MASK_8BIT;
+ txbuf[1] = data;
+ retval = i2c_master_send(pdata->i2c_client, txbuf, 2);
+ /* Add in retry on writes only in certian error return values */
+ if (retval != 2) {
+ dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval);
+ retval = -EIO;
+ } else
+ retval = 1;
+exit:
+ mutex_unlock(&(pdata->rmi4_page_mutex));
+ return retval;
+}
+
+/**
+ * synpatics_rmi4_touchpad_report() - reports for the rmi4 touchpad device
+ * @pdata: pointer to synaptics_rmi4_data structure
+ * @rfi: pointer to synaptics_rmi4_fn structure
+ *
+ * This function calls to reports for the rmi4 touchpad device
+ */
+static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
+ struct synaptics_rmi4_fn *rfi)
+{
+ /* number of touch points - fingers down in this case */
+ int touch_count = 0;
+ int finger;
+ int fingers_supported;
+ int finger_registers;
+ int reg;
+ int finger_shift;
+ int finger_status;
+ int retval;
+ unsigned short data_base_addr;
+ unsigned short data_offset;
+ unsigned char data_reg_blk_size;
+ unsigned char values[2];
+ unsigned char data[DATA_LEN];
+ int x[RMI4_NUMBER_OF_MAX_FINGERS];
+ int y[RMI4_NUMBER_OF_MAX_FINGERS];
+ int wx[RMI4_NUMBER_OF_MAX_FINGERS];
+ int wy[RMI4_NUMBER_OF_MAX_FINGERS];
+ struct i2c_client *client = pdata->i2c_client;
+
+ /* get 2D sensor finger data */
+ /*
+ * First get the finger status field - the size of the finger status
+ * field is determined by the number of finger supporte - 2 bits per
+ * finger, so the number of registers to read is:
+ * registerCount = ceil(numberOfFingers/4).
+ * Read the required number of registers and check each 2 bit field to
+ * determine if a finger is down:
+ * 00 = finger not present,
+ * 01 = finger present and data accurate,
+ * 10 = finger present but data may not be accurate,
+ * 11 = reserved for product use.
+ */
+ fingers_supported = rfi->num_of_data_points;
+ finger_registers = (fingers_supported + 3)/4;
+ data_base_addr = rfi->fn_desc.data_base_addr;
+ retval = synaptics_rmi4_i2c_block_read(pdata, data_base_addr, values,
+ finger_registers);
+ if (retval != finger_registers) {
+ dev_err(&client->dev, "%s:read status registers failed\n",
+ __func__);
+ return 0;
+ }
+ /*
+ * For each finger present, read the proper number of registers
+ * to get absolute data.
+ */
+ data_reg_blk_size = rfi->size_of_data_register_block;
+ for (finger = 0; finger < fingers_supported; finger++) {
+ /* determine which data byte the finger status is in */
+ reg = finger/4;
+ /* bit shift to get finger's status */
+ finger_shift = (finger % 4) * 2;
+ finger_status = (values[reg] >> finger_shift) & 3;
+ /*
+ * if finger status indicates a finger is present then
+ * read the finger data and report it
+ */
+ if (finger_status == 1 || finger_status == 2) {
+ /* Read the finger data */
+ data_offset = data_base_addr +
+ ((finger * data_reg_blk_size) +
+ finger_registers);
+ retval = synaptics_rmi4_i2c_block_read(pdata,
+ data_offset, data,
+ data_reg_blk_size);
+ if (retval != data_reg_blk_size) {
+ printk(KERN_ERR "%s:read data failed\n",
+ __func__);
+ return 0;
+ } else {
+ x[touch_count] =
+ (data[0] << 4) | (data[2] & MASK_4BIT);
+ y[touch_count] =
+ (data[1] << 4) |
+ ((data[2] >> 4) & MASK_4BIT);
+ wy[touch_count] =
+ (data[3] >> 4) & MASK_4BIT;
+ wx[touch_count] =
+ (data[3] & MASK_4BIT);
+
+ if (pdata->board->x_flip)
+ x[touch_count] =
+ pdata->sensor_max_x -
+ x[touch_count];
+ if (pdata->board->y_flip)
+ y[touch_count] =
+ pdata->sensor_max_y -
+ y[touch_count];
+ }
+ /* number of active touch points */
+ touch_count++;
+ }
+ }
+
+ /* report to input subsystem */
+ if (touch_count) {
+ for (finger = 0; finger < touch_count; finger++) {
+ input_report_abs(pdata->input_dev, ABS_MT_TOUCH_MAJOR,
+ max(wx[finger] , wy[finger]));
+ input_report_abs(pdata->input_dev, ABS_MT_POSITION_X,
+ x[finger]);
+ input_report_abs(pdata->input_dev, ABS_MT_POSITION_Y,
+ y[finger]);
+ input_mt_sync(pdata->input_dev);
+ }
+ } else
+ input_mt_sync(pdata->input_dev);
+
+ /* sync after groups of events */
+ input_sync(pdata->input_dev);
+ /* return the number of touch points */
+ return touch_count;
+}
+
+/**
+ * synaptics_rmi4_report_device() - reports the rmi4 device
+ * @pdata: pointer to synaptics_rmi4_data structure
+ * @rfi: pointer to synaptics_rmi4_fn
+ *
+ * This function is used to call the report function of the rmi4 device.
+ */
+static int synaptics_rmi4_report_device(struct synaptics_rmi4_data *pdata,
+ struct synaptics_rmi4_fn *rfi)
+{
+ int touch = 0;
+ struct i2c_client *client = pdata->i2c_client;
+ static int num_error_reports;
+ if (rfi->fn_number != SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) {
+ num_error_reports++;
+ if (num_error_reports < MAX_ERROR_REPORT)
+ dev_err(&client->dev, "%s:report not supported\n",
+ __func__);
+ } else
+ touch = synpatics_rmi4_touchpad_report(pdata, rfi);
+ return touch;
+}
+/**
+ * synaptics_rmi4_sensor_report() - reports to input subsystem
+ * @pdata: pointer to synaptics_rmi4_data structure
+ *
+ * This function is used to reads in all data sources and reports
+ * them to the input subsystem.
+ */
+static int synaptics_rmi4_sensor_report(struct synaptics_rmi4_data *pdata)
+{
+ unsigned char intr_status[4];
+ /* number of touch points - fingers or buttons */
+ int touch = 0;
+ unsigned int retval;
+ struct synaptics_rmi4_fn *rfi;
+ struct synaptics_rmi4_device_info *rmi;
+ struct i2c_client *client = pdata->i2c_client;
+
+ /*
+ * Get the interrupt status from the function $01
+ * control register+1 to find which source(s) were interrupting
+ * so we can read the data from the source(s) (2D sensor, buttons..)
+ */
+ retval = synaptics_rmi4_i2c_block_read(pdata,
+ pdata->fn01_data_base_addr + 1,
+ intr_status,
+ pdata->number_of_interrupt_register);
+ if (retval != pdata->number_of_interrupt_register) {
+ dev_err(&client->dev,
+ "could not read interrupt status registers\n");
+ return 0;
+ }
+ /*
+ * check each function that has data sources and if the interrupt for
+ * that triggered then call that RMI4 functions report() function to
+ * gather data and report it to the input subsystem
+ */
+ rmi = &(pdata->rmi4_mod_info);
+ list_for_each_entry(rfi, &rmi->support_fn_list, link) {
+ if (rfi->num_of_data_sources) {
+ if (intr_status[rfi->index_to_intr_reg] &
+ rfi->intr_mask)
+ touch = synaptics_rmi4_report_device(pdata,
+ rfi);
+ }
+ }
+ /* return the number of touch points */
+ return touch;
+}
+
+/**
+ * synaptics_rmi4_irq() - thread function for rmi4 attention line
+ * @irq: irq value
+ * @data: void pointer
+ *
+ * This function is interrupt thread function. It just notifies the
+ * application layer that attention is required.
+ */
+static irqreturn_t synaptics_rmi4_irq(int irq, void *data)
+{
+ struct synaptics_rmi4_data *pdata = data;
+ int touch_count;
+ do {
+ touch_count = synaptics_rmi4_sensor_report(pdata);
+ if (touch_count)
+ wait_event_timeout(pdata->wait, pdata->touch_stopped,
+ msecs_to_jiffies(1));
+ else
+ break;
+ } while (!pdata->touch_stopped);
+ return IRQ_HANDLED;
+}
+
+/**
+ * synpatics_rmi4_touchpad_detect() - detects the rmi4 touchpad device
+ * @pdata: pointer to synaptics_rmi4_data structure
+ * @rfi: pointer to synaptics_rmi4_fn structure
+ * @fd: pointer to synaptics_rmi4_fn_desc structure
+ * @interruptcount: count the number of interrupts
+ *
+ * This function calls to detects the rmi4 touchpad device
+ */
+static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata,
+ struct synaptics_rmi4_fn *rfi,
+ struct synaptics_rmi4_fn_desc *fd,
+ unsigned int interruptcount)
+{
+ unsigned char queries[QUERY_LEN];
+ unsigned short intr_offset;
+ unsigned char abs_data_size;
+ unsigned char abs_data_blk_size;
+ unsigned char egr_0, egr_1;
+ unsigned int all_data_blk_size;
+ int has_pinch, has_flick, has_tap;
+ int has_tapandhold, has_doubletap;
+ int has_earlytap, has_press;
+ int has_palmdetect, has_rotate;
+ int has_rel;
+ int i;
+ int retval;
+ struct i2c_client *client = pdata->i2c_client;
+
+ rfi->fn_desc.query_base_addr = fd->query_base_addr;
+ rfi->fn_desc.data_base_addr = fd->data_base_addr;
+ rfi->fn_desc.intr_src_count = fd->intr_src_count;
+ rfi->fn_desc.fn_number = fd->fn_number;
+ rfi->fn_number = fd->fn_number;
+ rfi->num_of_data_sources = fd->intr_src_count;
+ rfi->fn_desc.ctrl_base_addr = fd->ctrl_base_addr;
+ rfi->fn_desc.cmd_base_addr = fd->cmd_base_addr;
+
+ /*
+ * need to get number of fingers supported, data size, etc.
+ * to be used when getting data since the number of registers to
+ * read depends on the number of fingers supported and data size.
+ */
+ retval = synaptics_rmi4_i2c_block_read(pdata, fd->query_base_addr,
+ queries,
+ sizeof(queries));
+ if (retval != sizeof(queries)) {
+ dev_err(&client->dev, "%s:read function query registers\n",
+ __func__);
+ return retval;
+ }
+ /*
+ * 2D data sources have only 3 bits for the number of fingers
+ * supported - so the encoding is a bit wierd.
+ */
+ if ((queries[1] & MASK_3BIT) <= 4)
+ /* add 1 since zero based */
+ rfi->num_of_data_points = (queries[1] & MASK_3BIT) + 1;
+ else {
+ /*
+ * a value of 5 is up to 10 fingers - 6 and 7 are reserved
+ * (shouldn't get these i int retval;n a normal 2D source).
+ */
+ if ((queries[1] & MASK_3BIT) == 5)
+ rfi->num_of_data_points = 10;
+ }
+ /* Need to get interrupt info for handling interrupts */
+ rfi->index_to_intr_reg = (interruptcount + 7)/8;
+ if (rfi->index_to_intr_reg != 0)
+ rfi->index_to_intr_reg -= 1;
+ /*
+ * loop through interrupts for each source in fn $11
+ * and or in a bit to the interrupt mask for each.
+ */
+ intr_offset = interruptcount % 8;
+ rfi->intr_mask = 0;
+ for (i = intr_offset;
+ i < ((fd->intr_src_count & MASK_3BIT) + intr_offset); i++)
+ rfi->intr_mask |= 1 << i;
+
+ /* Size of just the absolute data for one finger */
+ abs_data_size = queries[5] & MASK_2BIT;
+ /* One each for X and Y, one for LSB for X & Y, one for W, one for Z */
+ abs_data_blk_size = 3 + (2 * (abs_data_size == 0 ? 1 : 0));
+ rfi->size_of_data_register_block = abs_data_blk_size;
+
+ /*
+ * need to determine the size of data to read - this depends on
+ * conditions such as whether Relative data is reported and if Gesture
+ * data is reported.
+ */
+ egr_0 = queries[7];
+ egr_1 = queries[8];
+
+ /*
+ * Get info about what EGR data is supported, whether it has
+ * Relative data supported, etc.
+ */
+ has_pinch = egr_0 & HAS_PINCH;
+ has_flick = egr_0 & HAS_FLICK;
+ has_tap = egr_0 & HAS_TAP;
+ has_earlytap = egr_0 & HAS_EARLYTAP;
+ has_press = egr_0 & HAS_PRESS;
+ has_rotate = egr_1 & HAS_ROTATE;
+ has_rel = queries[1] & HAS_RELEASE;
+ has_tapandhold = egr_0 & HAS_TAPANDHOLD;
+ has_doubletap = egr_0 & HAS_DOUBLETAP;
+ has_palmdetect = egr_1 & HAS_PALMDETECT;
+
+ /*
+ * Size of all data including finger status, absolute data for each
+ * finger, relative data and EGR data
+ */
+ all_data_blk_size =
+ /* finger status, four fingers per register */
+ ((rfi->num_of_data_points + 3) / 4) +
+ /* absolute data, per finger times number of fingers */
+ (abs_data_blk_size * rfi->num_of_data_points) +
+ /*
+ * two relative registers (if relative is being reported)
+ */
+ 2 * has_rel +
+ /*
+ * F11_2D_data8 is only present if the egr_0
+ * register is non-zero.
+ */
+ !!(egr_0) +
+ /*
+ * F11_2D_data9 is only present if either egr_0 or
+ * egr_1 registers are non-zero.
+ */
+ (egr_0 || egr_1) +
+ /*
+ * F11_2D_data10 is only present if EGR_PINCH or EGR_FLICK of
+ * egr_0 reports as 1.
+ */
+ !!(has_pinch | has_flick) +
+ /*
+ * F11_2D_data11 and F11_2D_data12 are only present if
+ * EGR_FLICK of egr_0 reports as 1.
+ */
+ 2 * !!(has_flick);
+ return retval;
+}
+
+/**
+ * synpatics_rmi4_touchpad_config() - confiures the rmi4 touchpad device
+ * @pdata: pointer to synaptics_rmi4_data structure
+ * @rfi: pointer to synaptics_rmi4_fn structure
+ *
+ * This function calls to confiures the rmi4 touchpad device
+ */
+int synpatics_rmi4_touchpad_config(struct synaptics_rmi4_data *pdata,
+ struct synaptics_rmi4_fn *rfi)
+{
+ /*
+ * For the data source - print info and do any
+ * source specific configuration.
+ */
+ unsigned char data[BUF_LEN];
+ int retval = 0;
+ struct i2c_client *client = pdata->i2c_client;
+
+ /* Get and print some info about the data source... */
+ /* To Query 2D devices we need to read from the address obtained
+ * from the function descriptor stored in the RMI function info.
+ */
+ retval = synaptics_rmi4_i2c_block_read(pdata,
+ rfi->fn_desc.query_base_addr,
+ data, QUERY_LEN);
+ if (retval != QUERY_LEN)
+ dev_err(&client->dev, "%s:read query registers failed\n",
+ __func__);
+ else {
+ retval = synaptics_rmi4_i2c_block_read(pdata,
+ rfi->fn_desc.ctrl_base_addr,
+ data, DATA_BUF_LEN);
+ if (retval != DATA_BUF_LEN) {
+ dev_err(&client->dev,
+ "%s:read control registers failed\n",
+ __func__);
+ return retval;
+ }
+ /* Store these for use later*/
+ pdata->sensor_max_x = ((data[6] & MASK_8BIT) << 0) |
+ ((data[7] & MASK_4BIT) << 8);
+ pdata->sensor_max_y = ((data[8] & MASK_5BIT) << 0) |
+ ((data[9] & MASK_4BIT) << 8);
+ }
+ return retval;
+}
+
+/**
+ * synaptics_rmi4_i2c_query_device() - query the rmi4 device
+ * @pdata: pointer to synaptics_rmi4_data structure
+ *
+ * This function is used to query the rmi4 device.
+ */
+static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata)
+{
+ int i;
+ int retval;
+ unsigned char std_queries[STD_QUERY_LEN];
+ unsigned char intr_count = 0;
+ int data_sources = 0;
+ unsigned int ctrl_offset;
+ struct synaptics_rmi4_fn *rfi;
+ struct synaptics_rmi4_fn_desc rmi_fd;
+ struct synaptics_rmi4_device_info *rmi;
+ struct i2c_client *client = pdata->i2c_client;
+
+ /*
+ * init the physical drivers RMI module
+ * info list of functions
+ */
+ INIT_LIST_HEAD(&pdata->rmi4_mod_info.support_fn_list);
+
+ /*
+ * Read the Page Descriptor Table to determine what functions
+ * are present
+ */
+ for (i = PDT_START_SCAN_LOCATION; i > PDT_END_SCAN_LOCATION;
+ i -= PDT_ENTRY_SIZE) {
+ retval = synaptics_rmi4_i2c_block_read(pdata, i,
+ (unsigned char *)&rmi_fd,
+ sizeof(rmi_fd));
+ if (retval != sizeof(rmi_fd)) {
+ /* failed to read next PDT entry */
+ dev_err(&client->dev, "%s: read error\n", __func__);
+ return -EIO;
+ }
+ rfi = NULL;
+ if (rmi_fd.fn_number) {
+ switch (rmi_fd.fn_number & MASK_8BIT) {
+ case SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM:
+ pdata->fn01_query_base_addr =
+ rmi_fd.query_base_addr;
+ pdata->fn01_ctrl_base_addr =
+ rmi_fd.ctrl_base_addr;
+ pdata->fn01_data_base_addr =
+ rmi_fd.data_base_addr;
+ break;
+ case SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM:
+ if (rmi_fd.intr_src_count) {
+ rfi = kmalloc(sizeof(*rfi),
+ GFP_KERNEL);
+ if (!rfi) {
+ dev_err(&client->dev,
+ "%s:kmalloc failed\n",
+ __func__);
+ return -ENOMEM;
+ }
+ retval = synpatics_rmi4_touchpad_detect
+ (pdata, rfi,
+ &rmi_fd,
+ intr_count);
+ if (retval < 0)
+ return retval;
+ }
+ break;
+ }
+ /* interrupt count for next iteration */
+ intr_count += (rmi_fd.intr_src_count & MASK_3BIT);
+ /*
+ * We only want to add functions to the list
+ * that have data associated with them.
+ */
+ if (rfi && rmi_fd.intr_src_count) {
+ /* link this function info to the RMI module */
+ mutex_lock(&(pdata->fn_list_mutex));
+ list_add_tail(&rfi->link,
+ &pdata->rmi4_mod_info.support_fn_list);
+ mutex_unlock(&(pdata->fn_list_mutex));
+ }
+ } else {
+ /*
+ * A zero in the function number
+ * signals the end of the PDT
+ */
+ dev_dbg(&client->dev,
+ "%s:end of PDT\n", __func__);
+ break;
+ }
+ }
+ /*
+ * calculate the interrupt register count - used in the
+ * ISR to read the correct number of interrupt registers
+ */
+ pdata->number_of_interrupt_register = (intr_count + 7) / 8;
+ /*
+ * Function $01 will be used to query the product properties,
+ * and product ID so we had to read the PDT above first to get
+ * the Fn $01 query address and prior to filling in the product
+ * info. NOTE: Even an unflashed device will still have FN $01.
+ */
+
+ /* Load up the standard queries and get the RMI4 module info */
+ retval = synaptics_rmi4_i2c_block_read(pdata,
+ pdata->fn01_query_base_addr,
+ std_queries,
+ sizeof(std_queries));
+ if (retval != sizeof(std_queries)) {
+ dev_err(&client->dev, "%s:Failed reading queries\n",
+ __func__);
+ return -EIO;
+ }
+
+ /* Currently supported RMI version is 4.0 */
+ pdata->rmi4_mod_info.version_major = 4;
+ pdata->rmi4_mod_info.version_minor = 0;
+ /*
+ * get manufacturer id, product_props, product info,
+ * date code, tester id, serial num and product id (name)
+ */
+ pdata->rmi4_mod_info.manufacturer_id = std_queries[0];
+ pdata->rmi4_mod_info.product_props = std_queries[1];
+ pdata->rmi4_mod_info.product_info[0] = std_queries[2];
+ pdata->rmi4_mod_info.product_info[1] = std_queries[3];
+ /* year - 2001-2032 */
+ pdata->rmi4_mod_info.date_code[0] = std_queries[4] & MASK_5BIT;
+ /* month - 1-12 */
+ pdata->rmi4_mod_info.date_code[1] = std_queries[5] & MASK_4BIT;
+ /* day - 1-31 */
+ pdata->rmi4_mod_info.date_code[2] = std_queries[6] & MASK_5BIT;
+ pdata->rmi4_mod_info.tester_id = ((std_queries[7] & MASK_7BIT) << 8) |
+ (std_queries[8] & MASK_7BIT);
+ pdata->rmi4_mod_info.serial_number =
+ ((std_queries[9] & MASK_7BIT) << 8) |
+ (std_queries[10] & MASK_7BIT);
+ memcpy(pdata->rmi4_mod_info.product_id_string, &std_queries[11], 10);
+
+ /* Check if this is a Synaptics device - report if not. */
+ if (pdata->rmi4_mod_info.manufacturer_id != 1)
+ dev_err(&client->dev, "%s: non-Synaptics mfg id:%d\n",
+ __func__, pdata->rmi4_mod_info.manufacturer_id);
+
+ list_for_each_entry(rfi, &pdata->rmi4_mod_info.support_fn_list, link)
+ data_sources += rfi->num_of_data_sources;
+ if (data_sources) {
+ rmi = &(pdata->rmi4_mod_info);
+ list_for_each_entry(rfi, &rmi->support_fn_list, link) {
+ if (rfi->num_of_data_sources) {
+ if (rfi->fn_number ==
+ SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) {
+ retval = synpatics_rmi4_touchpad_config
+ (pdata, rfi);
+ if (retval < 0)
+ return retval;
+ } else
+ dev_err(&client->dev,
+ "%s:fn_number not supported\n",
+ __func__);
+ /*
+ * Turn on interrupts for this
+ * function's data sources.
+ */
+ ctrl_offset = pdata->fn01_ctrl_base_addr + 1 +
+ rfi->index_to_intr_reg;
+ retval = synaptics_rmi4_i2c_byte_write(pdata,
+ ctrl_offset,
+ rfi->intr_mask);
+ if (retval < 0)
+ return retval;
+ }
+ }
+ }
+ return 0;
+}
+
+/**
+ * synaptics_rmi4_probe() - Initialze the i2c-client touchscreen driver
+ * @i2c: i2c client structure pointer
+ * @id:i2c device id pointer
+ *
+ * This function will allocate and initialize the instance
+ * data and request the irq and set the instance data as the clients
+ * platform data then register the physical driver which will do a scan of
+ * the rmi4 Physical Device Table and enumerate any rmi4 functions that
+ * have data sources associated with them.
+ */
+static int __devinit synaptics_rmi4_probe
+ (struct i2c_client *client, const struct i2c_device_id *dev_id)
+{
+ int retval;
+ unsigned char intr_status[4];
+ struct synaptics_rmi4_data *rmi4_data;
+ const struct synaptics_rmi4_platform_data *platformdata =
+ client->dev.platform_data;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(&client->dev, "i2c smbus byte data not supported\n");
+ return -EIO;
+ }
+
+ if (!platformdata) {
+ dev_err(&client->dev, "%s: no platform data\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Allocate and initialize the instance data for this client */
+ rmi4_data = kzalloc(sizeof(struct synaptics_rmi4_data) * 2,
+ GFP_KERNEL);
+ if (!rmi4_data) {
+ dev_err(&client->dev, "%s: no memory allocated\n", __func__);
+ return -ENOMEM;
+ }
+
+ rmi4_data->input_dev = input_allocate_device();
+ if (rmi4_data->input_dev == NULL) {
+ dev_err(&client->dev, "%s:input device alloc failed\n",
+ __func__);
+ retval = -ENOMEM;
+ goto err_input;
+ }
+
+ dev_set_name(&client->dev, platformdata->name);
+
+ if (platformdata->regulator_en) {
+ rmi4_data->regulator = regulator_get(&client->dev, "v-touch");
+ if (IS_ERR(rmi4_data->regulator)) {
+ dev_err(&client->dev, "%s:get regulator failed\n",
+ __func__);
+ retval = PTR_ERR(rmi4_data->regulator);
+ goto err_regulator;
+ }
+ regulator_enable(rmi4_data->regulator);
+ }
+
+ init_waitqueue_head(&rmi4_data->wait);
+ /*
+ * Copy i2c_client pointer into RTID's i2c_client pointer for
+ * later use in rmi4_read, rmi4_write, etc.
+ */
+ rmi4_data->i2c_client = client;
+ /* So we set the page correctly the first time */
+ rmi4_data->current_page = MASK_16BIT;
+ rmi4_data->board = platformdata;
+ rmi4_data->touch_stopped = false;
+
+ /* init the mutexes for maintain the lists */
+ mutex_init(&(rmi4_data->fn_list_mutex));
+ mutex_init(&(rmi4_data->rmi4_page_mutex));
+
+ /*
+ * Register physical driver - this will call the detect function that
+ * will then scan the device and determine the supported
+ * rmi4 functions.
+ */
+ retval = synaptics_rmi4_i2c_query_device(rmi4_data);
+ if (retval) {
+ dev_err(&client->dev, "%s: rmi4 query device failed\n",
+ __func__);
+ goto err_query_dev;
+ }
+
+ /* Store the instance data in the i2c_client */
+ i2c_set_clientdata(client, rmi4_data);
+
+ /*initialize the input device parameters */
+ rmi4_data->input_dev->name = DRIVER_NAME;
+ rmi4_data->input_dev->phys = "Synaptics_Clearpad";
+ rmi4_data->input_dev->id.bustype = BUS_I2C;
+ rmi4_data->input_dev->dev.parent = &client->dev;
+ input_set_drvdata(rmi4_data->input_dev, rmi4_data);
+
+ /* Initialize the function handlers for rmi4 */
+ set_bit(EV_SYN, rmi4_data->input_dev->evbit);
+ set_bit(EV_KEY, rmi4_data->input_dev->evbit);
+ set_bit(EV_ABS, rmi4_data->input_dev->evbit);
+
+ input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_X, 0,
+ rmi4_data->sensor_max_x, 0, 0);
+ input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_Y, 0,
+ rmi4_data->sensor_max_y, 0, 0);
+ input_set_abs_params(rmi4_data->input_dev, ABS_MT_TOUCH_MAJOR, 0,
+ MAX_TOUCH_MAJOR, 0, 0);
+
+ retval = input_register_device(rmi4_data->input_dev);
+ if (retval) {
+ dev_err(&client->dev, "%s:input register failed\n", __func__);
+ goto err_input_register;
+ }
+
+ /* Clear interrupts */
+ synaptics_rmi4_i2c_block_read(rmi4_data,
+ rmi4_data->fn01_data_base_addr + 1, intr_status,
+ rmi4_data->number_of_interrupt_register);
+ retval = request_threaded_irq(platformdata->irq_number, NULL,
+ synaptics_rmi4_irq,
+ platformdata->irq_type,
+ platformdata->name, rmi4_data);
+ if (retval) {
+ dev_err(&client->dev, "%s:Unable to get attn irq %d\n",
+ __func__, platformdata->irq_number);
+ goto err_request_irq;
+ }
+
+ return retval;
+
+err_request_irq:
+ free_irq(platformdata->irq_number, rmi4_data);
+ input_unregister_device(rmi4_data->input_dev);
+err_input_register:
+ i2c_set_clientdata(client, NULL);
+err_query_dev:
+ if (platformdata->regulator_en) {
+ regulator_disable(rmi4_data->regulator);
+ regulator_put(rmi4_data->regulator);
+ }
+err_regulator:
+ input_free_device(rmi4_data->input_dev);
+ rmi4_data->input_dev = NULL;
+err_input:
+ kfree(rmi4_data);
+
+ return retval;
+}
+/**
+ * synaptics_rmi4_remove() - Removes the i2c-client touchscreen driver
+ * @client: i2c client structure pointer
+ *
+ * This funtion uses to remove the i2c-client
+ * touchscreen driver and returns integer.
+ */
+static int __devexit synaptics_rmi4_remove(struct i2c_client *client)
+{
+ struct synaptics_rmi4_data *rmi4_data = i2c_get_clientdata(client);
+ const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board;
+
+ rmi4_data->touch_stopped = true;
+ wake_up(&rmi4_data->wait);
+ free_irq(pdata->irq_number, rmi4_data);
+ input_unregister_device(rmi4_data->input_dev);
+ if (pdata->regulator_en) {
+ regulator_disable(rmi4_data->regulator);
+ regulator_put(rmi4_data->regulator);
+ }
+ kfree(rmi4_data);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+/**
+ * synaptics_rmi4_suspend() - suspend the touch screen controller
+ * @dev: pointer to device structure
+ *
+ * This funtion is used to suspend the
+ * touch panel controller and returns integer
+ */
+static int synaptics_rmi4_suspend(struct device *dev)
+{
+ /* Touch sleep mode */
+ int retval;
+ unsigned char intr_status;
+ struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
+ const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board;
+
+ rmi4_data->touch_stopped = true;
+ disable_irq(pdata->irq_number);
+
+ retval = synaptics_rmi4_i2c_block_read(rmi4_data,
+ rmi4_data->fn01_data_base_addr + 1,
+ &intr_status,
+ rmi4_data->number_of_interrupt_register);
+ if (retval < 0)
+ return retval;
+
+ retval = synaptics_rmi4_i2c_byte_write(rmi4_data,
+ rmi4_data->fn01_ctrl_base_addr + 1,
+ (intr_status & ~TOUCHPAD_CTRL_INTR));
+ if (retval < 0)
+ return retval;
+
+ if (pdata->regulator_en)
+ regulator_disable(rmi4_data->regulator);
+
+ return 0;
+}
+/**
+ * synaptics_rmi4_resume() - resume the touch screen controller
+ * @dev: pointer to device structure
+ *
+ * This funtion is used to resume the touch panel
+ * controller and returns integer.
+ */
+static int synaptics_rmi4_resume(struct device *dev)
+{
+ int retval;
+ unsigned char intr_status;
+ struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
+ const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board;
+
+ if (pdata->regulator_en)
+ regulator_enable(rmi4_data->regulator);
+
+ enable_irq(pdata->irq_number);
+ rmi4_data->touch_stopped = false;
+
+ retval = synaptics_rmi4_i2c_block_read(rmi4_data,
+ rmi4_data->fn01_data_base_addr + 1,
+ &intr_status,
+ rmi4_data->number_of_interrupt_register);
+ if (retval < 0)
+ return retval;
+
+ retval = synaptics_rmi4_i2c_byte_write(rmi4_data,
+ rmi4_data->fn01_ctrl_base_addr + 1,
+ (intr_status | TOUCHPAD_CTRL_INTR));
+ if (retval < 0)
+ return retval;
+
+ return 0;
+}
+
+static const struct dev_pm_ops synaptics_rmi4_dev_pm_ops = {
+ .suspend = synaptics_rmi4_suspend,
+ .resume = synaptics_rmi4_resume,
+};
+#endif
+
+static const struct i2c_device_id synaptics_rmi4_id_table[] = {
+ { DRIVER_NAME, 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, synaptics_rmi4_id_table);
+
+static struct i2c_driver synaptics_rmi4_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &synaptics_rmi4_dev_pm_ops,
+#endif
+ },
+ .probe = synaptics_rmi4_probe,
+ .remove = __devexit_p(synaptics_rmi4_remove),
+ .id_table = synaptics_rmi4_id_table,
+};
+/**
+ * synaptics_rmi4_init() - Initialize the touchscreen driver
+ *
+ * This funtion uses to initializes the synaptics
+ * touchscreen driver and returns integer.
+ */
+static int __init synaptics_rmi4_init(void)
+{
+ return i2c_add_driver(&synaptics_rmi4_driver);
+}
+/**
+ * synaptics_rmi4_exit() - De-initialize the touchscreen driver
+ *
+ * This funtion uses to de-initialize the synaptics
+ * touchscreen driver and returns none.
+ */
+static void __exit synaptics_rmi4_exit(void)
+{
+ i2c_del_driver(&synaptics_rmi4_driver);
+}
+
+
+module_init(synaptics_rmi4_init);
+module_exit(synaptics_rmi4_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("naveen.gaddipati@...ricsson.com, js.ha@...ricsson.com");
+MODULE_DESCRIPTION("synaptics rmi4 i2c touch Driver");
+MODULE_ALIAS("i2c:synaptics_rmi4_ts");
diff --git a/include/linux/input/synaptics_i2c_rmi4.h b/include/linux/input/synaptics_i2c_rmi4.h
new file mode 100644
index 0000000..820ae27
--- /dev/null
+++ b/include/linux/input/synaptics_i2c_rmi4.h
@@ -0,0 +1,50 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver.
+ * Copyright (c) 2007-2010, Synaptics Incorporated
+ *
+ * Author: Js HA <js.ha@...ricsson.com> for ST-Ericsson
+ * Author: Naveen Kumar G <naveen.gaddipati@...ricsson.com> for ST-Ericsson
+ * Copyright 2010 (c) ST-Ericsson AB
+ */
+/*
+ * This file is licensed under the GPL2 license.
+ *
+ *#############################################################################
+ * GPL
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * 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.
+ *
+ *#############################################################################
+ */
+
+#ifndef _SYNAPTICS_RMI4_H_INCLUDED_
+#define _SYNAPTICS_RMI4_H_INCLUDED_
+
+/**
+ * struct synaptics_rmi4_platform_data - contains the rmi4 platform data
+ * @irq_number: irq number
+ * @irq_type: irq type
+ * @x flip: x flip flag
+ * @y flip: y flip flag
+ * @regulator_en: regulator enable flag
+ *
+ * This structure gives platform data for rmi4.
+ */
+struct synaptics_rmi4_platform_data {
+ const char *name;
+ int irq_number;
+ int irq_type;
+ bool x_flip;
+ bool y_flip;
+ bool regulator_en;
+};
+
+#endif
--
1.7.2.dirty
--
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