staging: delete STE RMI4 hackish driver

As of commit 62d5bdf972ebcfc99f72f734ae979713e4ca6450
"Merge branch 'synaptics-rmi4' into next" the input subsystem
has a proper RMI4 infrastructure and touchscreen driver.
The ST Ux500 platform has been converted to use the new driver
and its devicetree bindings. Delete this ancient hack.

Cc: Andrew Duggan <[e-mail]>
Cc: Christopher Heiny <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>
Acked-by: Dmitry Torokhov <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/Kconfig

···
 
 source "drivers/staging/speakup/Kconfig"
 
-source "drivers/staging/ste_rmi4/Kconfig"
-
 source "drivers/staging/nvec/Kconfig"
 
 source "drivers/staging/media/Kconfig"

drivers/staging/Makefile

···
 obj-$(CONFIG_FB_XGI)		+= xgifb/
 obj-$(CONFIG_USB_EMXX)		+= emxx_udc/
 obj-$(CONFIG_SPEAKUP)		+= speakup/
-obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4)	+= ste_rmi4/
 obj-$(CONFIG_MFD_NVEC)		+= nvec/
 obj-$(CONFIG_STAGING_RDMA)	+= rdma/
 obj-$(CONFIG_ANDROID)		+= android/

drivers/staging/ste_rmi4/Kconfig

···
-config TOUCHSCREEN_SYNAPTICS_I2C_RMI4
-	tristate "Synaptics i2c rmi4 touchscreen"
-	depends on I2C && INPUT
-	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.

drivers/staging/ste_rmi4/Makefile

···
-#
-# Makefile for the RMI4 touchscreen driver.
-#
-obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4) += synaptics_i2c_rmi4.o

drivers/staging/ste_rmi4/TODO

···
-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
-

drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c

···
-/**
- *
- * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver.
- * Copyright (c) 2007-2010, Synaptics Incorporated
- *
- * Author: Js HA <[e-mail]> for ST-Ericsson
- * Author: Naveen Kumar G <[e-mail]> 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/module.h>
-#include <linux/input/mt.h>
-#include "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 SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM	(0x11)
-#define SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM	(0x01)
-
-/**
- * struct synaptics_rmi4_fn_desc - contains the function 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 function 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 function 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
- * @fingers_supported: maximum supported fingers
- *
- * 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;
-	unsigned char		fingers_supported;
-};
-
-/**
- * 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, "failed:%d\n", 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 certain error return values */
-	if (retval != 2) {
-		dev_err(&i2c->dev, "failed:%d\n", 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	finger_registers;
-	int	reg;
-	int	finger_shift;
-	int	finger_status;
-	int	retval;
-	int	x, y;
-	int	wx, wy;
-	unsigned short	data_base_addr;
-	unsigned short	data_offset;
-	unsigned char	data_reg_blk_size;
-	unsigned char	values[2];
-	unsigned char	data[DATA_LEN];
-	unsigned char	fingers_supported = pdata->fingers_supported;
-	struct	i2c_client *client = pdata->i2c_client;
-	struct	input_dev *input_dev = pdata->input_dev;
-
-	/* 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.
-	 */
-	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
-		 */
-		input_mt_slot(input_dev, finger);
-		input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
-							finger_status != 0);
-
-		if (finger_status) {
-			/* 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) {
-				dev_err(&client->dev, "%s:read data failed\n",
-								__func__);
-				return 0;
-			}
-			x = (data[0] << 4) | (data[2] & MASK_4BIT);
-			y = (data[1] << 4) | ((data[2] >> 4) & MASK_4BIT);
-			wy = (data[3] >> 4) & MASK_4BIT;
-			wx = (data[3] & MASK_4BIT);
-
-			if (pdata->board->x_flip)
-				x = pdata->sensor_max_x - x;
-			if (pdata->board->y_flip)
-				y = pdata->sensor_max_y - y;
-
-			input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
-								max(wx, wy));
-			input_report_abs(input_dev, ABS_MT_POSITION_X, x);
-			input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
-
-			/* number of active touch points */
-			touch_count++;
-		}
-	}
-
-	/* sync after groups of events */
-	input_mt_sync_frame(input_dev);
-	input_sync(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 weird.
-	 */
-	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;
-	}
-	pdata->fingers_supported = rfi->num_of_data_points;
-	/* 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;
-}
-
-/**
- * synaptics_rmi4_touchpad_config() - configures the rmi4 touchpad device
- * @pdata: pointer to synaptics_rmi4_data structure
- * @rfi: pointer to synaptics_rmi4_fn structure
- *
- * This function calls to configures the rmi4 touchpad device
- */
-static int synaptics_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)
-						return -ENOMEM;
-					retval = synpatics_rmi4_touchpad_detect
-								(pdata,	rfi,
-								&rmi_fd,
-								intr_count);
-					if (retval < 0) {
-						kfree(rfi);
-						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, "non-Synaptics mfg id:%d\n",
-			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 = synaptics_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;
-}
-
-/*
- * Descriptor structure.
- * Describes the number of i2c devices on the bus that speak RMI.
- */
-static const struct synaptics_rmi4_platform_data synaptics_rmi4_platformdata = {
-	.irq_type       = (IRQF_TRIGGER_FALLING | IRQF_SHARED),
-	.x_flip		= false,
-	.y_flip		= true,
-};
-
-/**
- * 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 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)
-		platformdata = &synaptics_rmi4_platformdata;
-
-	/* Allocate and initialize the instance data for this client */
-	rmi4_data = kcalloc(2, sizeof(struct synaptics_rmi4_data),
-			    GFP_KERNEL);
-	if (!rmi4_data)
-		return -ENOMEM;
-
-	rmi4_data->input_dev = input_allocate_device();
-	if (!rmi4_data->input_dev) {
-		retval = -ENOMEM;
-		goto err_input;
-	}
-
-	rmi4_data->regulator = regulator_get(&client->dev, "vdd");
-	if (IS_ERR(rmi4_data->regulator)) {
-		dev_err(&client->dev, "%s:get regulator failed\n",
-							__func__);
-		retval = PTR_ERR(rmi4_data->regulator);
-		goto err_get_regulator;
-	}
-	retval = regulator_enable(rmi4_data->regulator);
-	if (retval < 0) {
-		dev_err(&client->dev, "%s:regulator enable failed\n",
-							__func__);
-		goto err_regulator_enable;
-	}
-	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);
-	input_mt_init_slots(rmi4_data->input_dev,
-				rmi4_data->fingers_supported, 0);
-
-	/* 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(client->irq, NULL,
-					synaptics_rmi4_irq,
-					platformdata->irq_type,
-					DRIVER_NAME, rmi4_data);
-	if (retval) {
-		dev_err(&client->dev, "Unable to get attn irq %d\n",
-			client->irq);
-		goto err_query_dev;
-	}
-
-	retval = input_register_device(rmi4_data->input_dev);
-	if (retval) {
-		dev_err(&client->dev, "%s:input register failed\n", __func__);
-		goto err_free_irq;
-	}
-
-	return retval;
-
-err_free_irq:
-	free_irq(client->irq, rmi4_data);
-err_query_dev:
-	regulator_disable(rmi4_data->regulator);
-err_regulator_enable:
-	regulator_put(rmi4_data->regulator);
-err_get_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 function uses to remove the i2c-client
- * touchscreen driver and returns integer.
- */
-static int synaptics_rmi4_remove(struct i2c_client *client)
-{
-	struct synaptics_rmi4_data *rmi4_data = i2c_get_clientdata(client);
-
-	rmi4_data->touch_stopped = true;
-	wake_up(&rmi4_data->wait);
-	free_irq(client->irq, rmi4_data);
-	input_unregister_device(rmi4_data->input_dev);
-	regulator_disable(rmi4_data->regulator);
-	regulator_put(rmi4_data->regulator);
-	kfree(rmi4_data);
-
-	return 0;
-}
-
-/**
- * synaptics_rmi4_suspend() - suspend the touch screen controller
- * @dev: pointer to device structure
- *
- * This function is used to suspend the
- * touch panel controller and returns integer
- */
-static int __maybe_unused 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);
-
-	rmi4_data->touch_stopped = true;
-	disable_irq(rmi4_data->i2c_client->irq);
-
-	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;
-
-	regulator_disable(rmi4_data->regulator);
-
-	return 0;
-}
-/**
- * synaptics_rmi4_resume() - resume the touch screen controller
- * @dev: pointer to device structure
- *
- * This function is used to resume the touch panel
- * controller and returns integer.
- */
-static int __maybe_unused synaptics_rmi4_resume(struct device *dev)
-{
-	int retval;
-	unsigned char intr_status;
-	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
-
-	retval = regulator_enable(rmi4_data->regulator);
-	if (retval) {
-		dev_err(dev, "Regulator enable failed (%d)\n", retval);
-		return retval;
-	}
-
-	enable_irq(rmi4_data->i2c_client->irq);
-	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 SIMPLE_DEV_PM_OPS(synaptics_rmi4_dev_pm_ops, synaptics_rmi4_suspend,
-			 synaptics_rmi4_resume);
-
-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,
-		.pm	=	&synaptics_rmi4_dev_pm_ops,
-	},
-	.probe		=	synaptics_rmi4_probe,
-	.remove		=	synaptics_rmi4_remove,
-	.id_table	=	synaptics_rmi4_id_table,
-};
-
-module_i2c_driver(synaptics_rmi4_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("[e-mail], [e-mail]");
-MODULE_DESCRIPTION("synaptics rmi4 i2c touch Driver");

drivers/staging/ste_rmi4/synaptics_i2c_rmi4.h

···
-/**
- *
- * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver.
- * Copyright (c) 2007-2010, Synaptics Incorporated
- *
- * Author: Js HA <[e-mail]> for ST-Ericsson
- * Author: Naveen Kumar G <[e-mail]> 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
- *
- * This structure gives platform data for rmi4.
- */
-struct synaptics_rmi4_platform_data {
-	int irq_type;
-	bool x_flip;
-	bool y_flip;
-};
-
-#endif