[RFC PATCH 1/1] input/touchscreen: Synaptics Touchscreen Driver
From: Christopher Heiny
Date: Mon Mar 22 2010 - 22:08:24 EST
Initial driver for Synaptics touchscreens using RMI4 protocol.
Signed-off-by: William Manson <WManson@xxxxxxxxxxxxx>
Signed-off-by: Allie Xiong <axiong@xxxxxxxxxxxxx>
Signed-off-by: Christopher Heiny <cheiny@xxxxxxxxxxxxx>
---
drivers/input/touchscreen/Kconfig | 13 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/rmi.h | 196 ++++++++
drivers/input/touchscreen/rmi_app_touchpad.c | 355 +++++++++++++++
drivers/input/touchscreen/rmi_core.c | 632 ++++++++++++++++++++++++++
drivers/input/touchscreen/rmi_core.h | 57 +++
drivers/input/touchscreen/rmi_function_11.c | 352 ++++++++++++++
drivers/input/touchscreen/rmi_function_11.h | 39 ++
drivers/input/touchscreen/rmi_functions.h | 109 +++++
drivers/input/touchscreen/rmi_i2c.h | 54 +++
drivers/input/touchscreen/rmi_i2c_gta01.c | 122 +++++
drivers/input/touchscreen/rmi_phys_i2c.c | 545 ++++++++++++++++++++++
12 files changed, 2475 insertions(+), 0 deletions(-)
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 8a8fa4d..ebd3abf 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -307,6 +307,19 @@ config TOUCHSCREEN_MIGOR
To compile this driver as a module, choose M here: the
module will be called migor_ts.
+config TOUCHSCREEN_SYNAPTICS_RMI4_I2C
+ tristate "Synaptics RMI4 I2C touchscreens"
+ depends on I2C
+ help
+ Say Y here if you have a Synaptics RMI4 I2C touchscreen connected to
+ your system. This enables support for Synaptics RMI4 over I2C based
+ touchscreens.
+
+ If unsure, say N.
+
+ To compile this driver as a set of modules, choose M here: the
+ modules will be called rmi, rmi_app_touchpad, rmi_phys_i2c.
+
config TOUCHSCREEN_TOUCHRIGHT
tristate "Touchright serial touchscreen"
select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 7fef7d5..d76bca4 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o
obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
+obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_RMI4_I2C) += rmi_core.o rmi_app_touchpad.o rmi_function_11.o rmi_phys_i2c.o rmi_i2c_gta01.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
diff --git a/drivers/input/touchscreen/rmi.h b/drivers/input/touchscreen/rmi.h
new file mode 100755
index 0000000..7b58094
--- /dev/null
+++ b/drivers/input/touchscreen/rmi.h
@@ -0,0 +1,196 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) Header File.
+ * Copyright (c) 2007-2009 Synaptics Incorporated
+ *
+ *
+ */
+/*
+ * 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 _RMI_H
+#define _RMI_H
+
+/* RMI4 Protocol Support
+ */
+
+/* For each function present on the RMI device, we need to get the RMI4 Function
+ * Descriptor info from the Page Descriptor Table. This will give us the
+ * addresses for Query, Command, Control, Data and the Source Count (number
+ * of sources for this function) and the function id.
+ */
+struct rmi_function_descriptor {
+ unsigned char queryBaseAddr;
+ unsigned char commandBaseAddr;
+ unsigned char controlBaseAddr;
+ unsigned char dataBaseAddr;
+ unsigned char interruptSrcCnt;
+ unsigned char functionNum;
+};
+
+/* For each function present on the RMI device, there will be a corresponding
+ * entry in the functions list of the rmi_module_info structure. This entry
+ * gives information about the number of data sources and the number of data
+ * registers associated with the function.
+ */
+struct rmi_function_info {
+ unsigned char functionNum;
+
+ /* This is the number of data sources associated with the function.*/
+ unsigned char numSources;
+
+ /* This is the number of data points supported - for example, for
+ * function $11 (2D sensor) the number of data points is equal to the number
+ * of fingers - for function $19 (buttons)it is the number of buttons.
+ */
+ unsigned char numDataPoints;
+
+ /* This is the number of data registers to read.*/
+ unsigned char dataRegBlockSize;
+
+ /* This is the interrupt register and mask - needed for enabling the interrupts
+ * and for checking what source had caused the attention line interrupt.
+ */
+ unsigned char interruptRegister;
+ unsigned char interruptMask;
+
+ /* This is the RMI function descriptor associated with this function.
+ * It contains the Base addresses for the functions query, command,
+ * control, and data registers.
+ */
+ struct rmi_function_descriptor funcDescriptor;
+
+ /* A list of the function information.
+ * This list uses the standard kernel linked list implementation.
+ * Documentation on on how to use it can be found at
+ * http://isis.poly.edu/kulesh/stuff/src/klist/.
+ */
+ struct list_head link;
+};
+
+/* This encapsulates the information found using the RMI4 Function $01
+ * query registers. There is only one Function $01 per device.
+ *
+ * Assuming appropriate endian-ness, you can populate most of this
+ * structure by reading query registers starting at the query base address
+ * that was obtained from RMI4 function 0x01 function descriptor info read
+ * from the Page Descriptor Table.
+ *
+ * Specific register information is provided in the comments for each field.
+ * For further reference, please see the "Synaptics RMI 4 Interfacing
+ * Guide" document : go to http://www.synaptics.com/developers/manuals - and select
+ * "Synaptics RMI 4 Interfacting Guide".
+ */
+struct rmi_module_info {
+ /* The Protocol Major Version number.*/
+ unsigned rmi_maj_ver;
+
+ /* The Protocol Minor Version number.*/
+ unsigned rmi_min_ver;
+
+ /* The manufacturer identification byte.*/
+ unsigned char mfgid;
+
+ /* The Product Properties information.*/
+ unsigned char properties;
+
+ /* The product info bytes.*/
+ unsigned char prod_info[2];
+
+ /* Date Code - Year, Month, Day.*/
+ unsigned char date_code[3];
+
+ /* Tester ID (14 bits).*/
+ unsigned short tester_id;
+
+ /* Serial Number (14 bits).*/
+ unsigned short serial_num;
+
+ /* A null-terminated string that identifies this particular product.*/
+ char prod_id[10];
+
+ /* A list of the function presence queries.
+ * This list uses the standard kernel linked list implementation.
+ * Documentation on on how to use it can be found at
+ * http://isis.poly.edu/kulesh/stuff/src/klist/.
+ */
+ struct list_head functions;
+};
+
+struct rmi_phys_driver {
+ char *name;
+ int (*write)(struct rmi_phys_driver *pd, unsigned short address, char data);
+ int (*read)(struct rmi_phys_driver *pd, unsigned short address, char *buffer);
+ int (*write_multiple)(struct rmi_phys_driver *pd, unsigned short address, char *buffer, int length);
+ int (*read_multiple)(struct rmi_phys_driver *pd, unsigned short address, char *buffer, int length);
+ void (*attention)(struct rmi_phys_driver *pd, int instance);
+ int (*get_attention)(struct rmi_phys_driver *pd);
+ bool polling_required;
+
+ /* Standard kernel linked list implementation.
+ * Documentation on how to use it can be found at
+ * http://isis.poly.edu/kulesh/stuff/src/klist/.
+ */
+ struct list_head drivers;
+ struct rmi_application *app;
+ struct rmi_module_info rmi;
+ struct module *module;
+};
+
+int rmi_read(struct rmi_application *app, unsigned short address, char *dest);
+int rmi_write(struct rmi_application *app, unsigned short address, unsigned char data);
+int rmi_read_multiple(struct rmi_application *app, unsigned short address, char *dest, int length);
+int rmi_write_multiple(struct rmi_application *app, unsigned short address, unsigned char *data, int length);
+int rmi_register_phys_driver(struct rmi_phys_driver *rpd);
+int rmi_unregister_phys_driver(struct rmi_phys_driver *rpd);
+
+struct rmi_application *rmi_register_application(const char *name,
+ void (*attention)(struct rmi_phys_driver *pd, int instance),
+ int (*probe)(struct rmi_application *app, const struct rmi_module_info *rmi),
+ void (*config)(struct rmi_application *app));
+
+void rmi_unregister_application(struct rmi_application *app);
+bool rmi_polling_required(struct rmi_application *app);
+int rmi_get_attn(struct rmi_application *app);
+
+/* Set this to 1 to turn on code used in detecting buffer leaks. */
+#define RMI_ALLOC_STATS 1
+
+#if RMI_ALLOC_STATS
+extern int appallocsrmi;
+extern int rfiallocsrmi;
+extern int fnallocsrmi;
+
+#define INC_ALLOC_STAT(X) (X##allocsrmi++)
+#define DEC_ALLOC_STAT(X) \
+ do { \
+ if (X##allocsrmi) X##allocsrmi--; \
+ else printk(KERN_DEBUG "Too many " #X " frees\n"); \
+ } while (0)
+#define CHECK_ALLOC_STAT(X) \
+ do { \
+ if (X##allocsrmi) printk(KERN_DEBUG "Left over " #X " buffers: %d\n", \
+ X##allocsrmi); \
+ } while (0)
+#else
+#define INC_ALLOC_STAT(X) do { } while (0)
+#define DEC_ALLOC_STAT(X) do { } while (0)
+#define CHECK_ALLOC_STAT(X) do { } while (0)
+#endif
+
+#endif
diff --git a/drivers/input/touchscreen/rmi_app_touchpad.c b/drivers/input/touchscreen/rmi_app_touchpad.c
new file mode 100755
index 0000000..9624a7c
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_app_touchpad.c
@@ -0,0 +1,355 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) TouchPad Application Layer Driver.
+ * Copyright (c) 2007-2009 Synaptics Incorporated
+ *
+ *
+ * This code implements a polling mechanism using a timer as well as
+ * interrupt-driven sampling.
+ *
+ * Note that it is the lower-level drivers that determine whether this driver
+ * has to do polling or interrupt-driven. Polling can always be done, but if
+ * we have an interrupt connected to the attention (ATTN) line, then it is
+ * better to be interrupt driven.
+ *
+ */
+/*
+ * 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/kernel.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/hrtimer.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/input.h>
+
+#include "rmi.h"
+#include "rmi_core.h"
+#include "rmi_functions.h"
+
+#define RMI_REPORT_RATE_80 0
+#define RMI_REPORT_RATE_40 (1 << 6)
+
+static long polltime = 25000000;
+module_param(polltime, long, 0644);
+MODULE_PARM_DESC(polltime, "How long to wait between polls (in nano seconds).");
+
+static struct rmi_application *app;
+
+/* TODO: We should move this to the application data struct and allow more than one
+ input device per system. We'll address in a follow up patch. */
+static struct input_dev *input;
+
+extern unsigned short fn01ControlBaseAddr; /* RMI4 device control == function 0x01 */
+extern unsigned int interruptRegisterCount; /* number of total interrupt registers to read */
+
+
+/**
+ * This is the function we pass to the RMI4 subsystem so we can be notified
+ * when attention is required. It may be called in interrupt context.
+ */
+static void attention(struct rmi_phys_driver *rpd, int instance)
+{
+ /* All we have to do is schedule work. */
+ schedule_work(&(rpd->app->work));
+}
+
+/**
+ * This is the meat of the driver. It reads in all data sources and reports them to
+ * the input subsystem. It is used for both polling and interrupt driven operation.
+ */
+int report_sensor_data(struct rmi_application *app)
+{
+ unsigned char interruptStatus[4] = {0, 0, 0, 0};
+ int touch; /* number of touch points - fingers or buttons */
+ struct rmi_functions *fn;
+ struct rmi_function_info *rfi;
+ struct rmi_phys_driver *rpd;
+ struct rmi_module_info *rmi;
+ static int num_error_reports;
+
+ touch = 0;
+
+ /* 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, etc.).
+ */
+ if (rmi_read_multiple(app, fn01ControlBaseAddr + 1, interruptStatus, interruptRegisterCount)) {
+ printk(KERN_ERR "Could not read interrupt status registers 0x%x\n", fn01ControlBaseAddr + 1);
+ 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
+ */
+ rpd = app->rpd; /* get ptr to rmi_physical_driver from app */
+ rmi = &(rpd->rmi); /* get ptr to rmi_module_info from physical driver */
+
+ list_for_each_entry(rfi, &rmi->functions, link) {
+ if (rfi->numSources) {
+ if (interruptStatus[rfi->interruptRegister] & rfi->interruptMask) {
+ bool found;
+ found = false;
+ fn = rmi_find_function(rfi->functionNum);
+ if (fn) {
+ found = true;
+ if (fn->report) {
+ touch = fn->report(app, rfi, fn->input);
+ } else {
+ num_error_reports++;
+ if (num_error_reports < 6) {
+ /* the developer did not add in the pointer to the report
+ function into rmi4_supported_data_src_functions
+ */
+ printk(KERN_ERR "rmi_app_touchpad.report_sensor_data: no find report function for function 0x%x\n", fn->functionNum);
+ }
+ }
+ }
+
+ if (!found) {
+ num_error_reports++;
+ if (num_error_reports < 6) {
+ /* if no support found for this RMI4 function it means the
+ developer did not add the appropriate function pointer
+ list into the rmi4_supported_data_src_functions array
+ and/or did not bump up the number of supported RMI4
+ functions in rmi.h as required
+ */
+ printk(KERN_ERR "rmi_app_touchpad.report_sensor_data: could not any support for function 0x%x\n", fn->functionNum);
+ }
+ }
+ }
+ }
+ }
+
+ /* return the number of touch points - fingers down and/or buttons pressed, etc. */
+ return touch;
+}
+
+/* This is the worker function for interrupts - it simply has to call report_sensor_data. */
+static void ts_work_func(struct work_struct *work)
+{
+ struct rmi_application *app = container_of(work, struct rmi_application, work);
+
+ report_sensor_data(app);
+}
+
+/* This is the timer function for polling - it simply has to schedule work and restart the timer. */
+static enum hrtimer_restart ts_poll_timer_func(struct hrtimer *timer)
+{
+ struct rmi_application *app = container_of(timer, struct rmi_application, timer);
+
+ schedule_work(&app->work);
+ hrtimer_start(&app->timer, ktime_set(0, polltime), HRTIMER_MODE_REL);
+ return HRTIMER_NORESTART;
+}
+
+/**
+ * This is the probe function passed to the RMI4 subsystem that gives us a
+ * chance to recognize an RMI4 device. In this case, we're looking for
+ * Synaptics devices that have data sources - such as touch screens, buttons, etc.
+ */
+static int probe(struct rmi_application *app, const struct rmi_module_info *rmi)
+{
+ struct rmi_function_info *rfi;
+ int data_sources = 0;
+ int retval = 0;
+
+ if (!rmi) {
+ printk(KERN_ERR "rmi_app_touchpad.probe: "
+ "Invalid module info: %p\n", rmi);
+ return 0;
+ }
+
+ /* Make sure this is a Synaptics device */
+ if (rmi->mfgid != 1) { /* Synaptics */
+ printk(KERN_ERR "rmi_app_touchpad.probe: "
+ "Invalid mfg id: %d\n", rmi->mfgid);
+ return 0;
+ }
+
+ /* for each function entry in the list accumulate it's number of data sources */
+ list_for_each_entry(rfi, &rmi->functions, link) {
+ data_sources += rfi->numSources;
+ }
+
+ if (data_sources) {
+ retval = 1;
+ /* We have detected one or more data sources such as a 2D Sensors, buttons, etc. */
+ printk(KERN_ERR "rmi_app_touchpad.probe: "
+ "Found %d data sources for : %p\n", data_sources, rmi);
+ } else {
+ /* we don't have any data sources for this sensor - oops! - either an un-flashed sensor or bad!! */
+ printk(KERN_ERR "rmi_app_touchpad.probe: "
+ "No data sources found for : %p\n", rmi);
+ }
+
+ return retval;
+}
+
+static void config(struct rmi_application *app)
+{
+ /* For each data source we had detected print info and set up interrupts or polling. */
+ struct rmi_function_info *rfi;
+ struct rmi_phys_driver *rpd;
+ struct rmi_module_info *rmi;
+
+ rpd = app->rpd; /* get ptr to rmi_physical_driver from app */
+ rmi = &(rpd->rmi); /* get ptr to rmi_module_info from physical driver */
+
+ list_for_each_entry(rfi, &rmi->functions, link) {
+ if (rfi->numSources) /* if this function has data sources associated with it...*/ {
+ /* Get and print some info about the data sources... */
+ struct rmi_functions *fn;
+ bool found = false;
+ /* check if function number matches - if so call that config function */
+ fn = rmi_find_function(rfi->functionNum);
+ if (fn) {
+ found = true;
+ if (fn->config) {
+ fn->config(app, rfi);
+ } else {
+ /* the developer did not add in the pointer to the config
+ function into rmi4_supported_data_src_functions */
+ printk(KERN_ERR "rmi_app_touchpad.config - no config function for function 0x%x\n", rfi->functionNum);
+ break;
+ }
+ }
+
+ if (!found) {
+ /* if no support found for this RMI4 function it means the
+ developer did not add the appropriate function pointer list
+ into the rmi4_supported_data_src_functions array and/or did
+ not bump up the number of supported RMI4 functions in rmi.h as
+ required */
+ printk(KERN_ERR "rmi_app_touchpad.config - could not find support for function 0x%x\n", rfi->functionNum);
+ }
+
+ /* if we are not doing polling then enable the interrupts for the data sources for this function */
+ if (!rmi_polling_required(app)) {
+ /* Turn on interrupts for this functions data sources. */
+ rmi_write(app, fn01ControlBaseAddr + 1 + rfi->interruptRegister, rfi->interruptMask);
+ printk(KERN_INFO "rmi_app_touchpad.config - Interrupt Driven - turning on interrupts for function 0x%x\n", rfi->functionNum);
+ }
+ }
+ }
+
+ /* if we are not polling we need to set up the interrupt worker thread - otherwise we need to
+ set up the polling callback and worker thread. */
+ if (!rmi_polling_required(app)) {
+ /* We're interrupt driven, so set up packet rate and the worker thread function. */
+ if (HZ < 500) {
+ /* The default packet rate of 80 packets per
+ * second is too fast (the Linux time slice for
+ * sub-GHz processors is only 100 times per second).
+ * So re-program it to 40 packets per second.
+ */
+ rmi_write(app, fn01ControlBaseAddr, RMI_REPORT_RATE_40);
+ }
+
+ INIT_WORK(&app->work, ts_work_func);
+
+ } else {
+ /* We're polling driven, so set up the polling timer and timer function. */
+ INIT_WORK(&app->work, ts_work_func);
+ hrtimer_init(&app->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ app->timer.function = ts_poll_timer_func;
+ hrtimer_start(&app->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
+ }
+}
+
+/**
+ * The module initialization function in which we register as a RMI4
+ * application driver. We also register with the input subsystem so we can
+ * pass coordinates to it.
+ */
+static int __init rmi_app_touchpad_init(void)
+{
+ int retval;
+
+ retval = 0;
+
+ pr_debug("rmi_app_touchpad.mod_init: RMI4 TouchPad Driver\n");
+
+ /* NOTE: we are creating only one input dev file for this but theoretically
+ you could create a separate one for each data source and store it below.
+ This will let you put 2D sensor events into one dev file, button events into
+ a separate dev file, other data source event like GPIOs, etc. into yet a
+ third dev file. As this is being coded it will dump all events into the
+ one dev file.
+ */
+ input = input_allocate_device();
+ if (input == NULL) {
+ printk(KERN_ERR "rmi_app_touchpad.mod_init: Failed to allocate memory for a new input device.\n");
+ return -ENOMEM;
+ }
+
+ input->name = "RMI4 Touchpad";
+ input->phys = "rmi_app_touchpad";
+
+ /* Set input device specific params for each data source...*/
+ retval = rmi_functions_init(input);
+
+ if (retval) {
+ printk(KERN_ERR "rmi_app_touchpad.mod_init: Failed rmi_functions_init.\n");
+ return retval;
+ }
+
+ retval = input_register_device(input);
+
+ if (retval) {
+ printk(KERN_ERR "rmi_app_touchpad.mod_init: Failed input_register_device.\n");
+ return retval;
+ }
+
+ app = rmi_register_application("rmi4_touchpad", attention, probe, config);
+
+ if (!app) {
+ printk(KERN_ERR "rmi_app_touchpad.mod_init: Failed to register app.\n");
+ input_unregister_device(input);
+ retval = -ENODEV;
+ }
+
+ return retval;
+}
+
+static void __exit rmi_app_touchpad_exit(void)
+{
+ pr_debug("rmi_app_touchpad.mod_exit: RMI4 TouchPad Driver\n");
+
+ /* Stop the polling timer if doing polling */
+ if (rmi_polling_required(app)) {
+ hrtimer_cancel(&app->timer);
+ }
+
+ flush_scheduled_work(); /* Make sure all scheduled work is stopped */
+
+ /* Unregister everything */
+ printk(KERN_WARNING "rmi_app_touchpad.mod_exit: Unregistering app - %s\n", app->name);
+ rmi_unregister_application(app);
+ input_unregister_device(input);
+}
+
+module_init(rmi_app_touchpad_init);
+module_exit(rmi_app_touchpad_exit);
+
+MODULE_AUTHOR("Synaptics, Inc.");
+MODULE_DESCRIPTION("RMI4 Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/rmi_core.c b/drivers/input/touchscreen/rmi_core.c
new file mode 100755
index 0000000..885e7ee
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_core.c
@@ -0,0 +1,632 @@
+/**
+ * Synaptics Register Mapped Interface (RMI4) Data Layer Driver.
+ * Copyright (C) 2007 - 2009, Synaptics Incorporated
+ *
+ *
+ * This protocol is layered as follows.
+ *
+ *
+ * +----------------------------------------+
+ * | |
+ * | Application |
+ * | |
+ * +----------------------------------------+
+ * | |
+ * | RMI4 Driver | Data Layer (THIS DRIVER)
+ * | (this file) |
+ * +-----+-----+-------+----------+---------+
+ * | I2C | SPI | SMBus | etc. | Physical Layer
+ * +-----+-----+-------+----------+---------+
+ *
+ * Each of the physical layer drivers is contained in a file called
+ * rmi_phys_xxx.c. Someone compiling the kernel enables CONFIG_RMI and then
+ * one or more CONFIG_RMI_xxx options in the .config file. For example, when
+ * CONFIG_RMI_I2C=m is enabled, a rmi.ko and a rmi_phys_i2c.ko will be
+ * compiled. rmi_phys_i2c.ko will depend on rmi.ko, so when rmi_phys_i2c.ko
+ * is loaded, rmi.ko will automatically be loaded. Each of the physical
+ * layer drivers is a platform_driver that may handle suspend/resume, etc.,
+ * so this driver does not do so.
+ *
+ * The register paradigm of RMI is a "pull" rather than "push" data flow.
+ * As such, it is the application driver that needs to implement either
+ * polling or interrupt driven, and the physical driver merely handles
+ * the register accesses. For interrupt driven, the application registers
+ * an "attention" function that may be called in interrupt context by the
+ * physical driver if an attention interrupt is available. The physical
+ * driver notifies the application through the polling_required variable,
+ * and the application driver must do one or the other based on this variable.
+ *
+ * At this point in time, there can only be one application driver per
+ * physical driver.
+ *
+ */
+/*
+ * 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.
+ *
+ *#############################################################################
+ */
+
+static const char drvname[] = "rmi4";
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/hrtimer.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <asm/uaccess.h>
+
+#include "rmi.h"
+#include "rmi_core.h"
+#include "rmi_functions.h"
+
+/* we need these to control the device and query interrupts */
+unsigned short fn01QueryBaseAddr; /* RMI4 device control */
+EXPORT_SYMBOL(fn01QueryBaseAddr);
+unsigned short fn01ControlBaseAddr;
+EXPORT_SYMBOL(fn01ControlBaseAddr);
+unsigned int interruptRegisterCount;
+EXPORT_SYMBOL(interruptRegisterCount);
+
+#define PDT_START_SCAN_LOCATION 0x00E9
+#define PDT_END_SCAN_LOCATION 0x000A
+#define PDT_ENTRY_SIZE 0x0006
+
+static LIST_HEAD(phys_drivers);
+static DEFINE_MUTEX(phys_drivers_mutex);
+static LIST_HEAD(app_drivers);
+static DEFINE_MUTEX(app_drivers_mutex);
+static DEFINE_MUTEX(rfi_mutex);
+static LIST_HEAD(fns_list);
+static DEFINE_MUTEX(fns_mutex);
+
+
+#if RMI_ALLOC_STATS
+int appallocsrmi = 0;
+EXPORT_SYMBOL(appallocsrmi);
+int rfiallocsrmi = 0;
+EXPORT_SYMBOL(rfiallocsrmi);
+int fnallocsrmi = 0;
+EXPORT_SYMBOL(fnallocsrmi);
+#endif
+
+int rmi_read(struct rmi_application *app, unsigned short address, char *dest)
+{
+ struct rmi_phys_driver *rpd = app->rpd;
+ if (!app->rpd)
+ return -ENODEV;
+ return rpd->read(rpd, address, dest);
+}
+EXPORT_SYMBOL(rmi_read);
+
+int rmi_write(struct rmi_application *app, unsigned short address, unsigned char data)
+{
+ struct rmi_phys_driver *rpd = app->rpd;
+ if (!app->rpd)
+ return -ENODEV;
+ return rpd->write(rpd, address, data);
+}
+EXPORT_SYMBOL(rmi_write);
+
+int rmi_read_multiple(struct rmi_application *app, unsigned short address, char *dest, int length)
+{
+ struct rmi_phys_driver *rpd = app->rpd;
+ if (!app->rpd)
+ return -ENODEV;
+ return rpd->read_multiple(rpd, address, dest, length);
+}
+EXPORT_SYMBOL(rmi_read_multiple);
+
+int rmi_write_multiple(struct rmi_application *app, unsigned short address, unsigned char *data, int length)
+{
+ struct rmi_phys_driver *rpd = app->rpd;
+ if (!app->rpd)
+ return -ENODEV;
+ return rpd->write_multiple(rpd, address, data, length);
+}
+EXPORT_SYMBOL(rmi_write_multiple);
+
+bool rmi_polling_required(struct rmi_application *app)
+{
+ return app->polling_required;
+}
+EXPORT_SYMBOL(rmi_polling_required);
+
+int rmi_get_attn(struct rmi_application *app)
+{
+ if (!app->rpd)
+ return -ENODEV;
+ return app->rpd->get_attention(app->rpd);
+}
+EXPORT_SYMBOL(rmi_get_attn);
+
+/*
+ This function searches for a match between an app driver and physical
+ driver and binds them together.
+*/
+static void match_and_bind(struct rmi_application *app, struct rmi_phys_driver *rpd)
+{
+ app->polling_required = rpd->polling_required;
+
+ if (app->probe(app, &rpd->rmi)) {
+ /* Found a match, bind them together. */
+ /* The try_module_get() makes sure that the physical
+ * driver cannot be unloaded while a app driver is
+ * using it.
+ */
+ if (try_module_get(rpd->module)) {
+ app->rpd = rpd;
+ rpd->app = app;
+ printk(KERN_INFO "%s: %s bound to %s\n", drvname, app->name, rpd->name);
+ rpd->attention = app->attention;
+ app->config(app);
+ }
+ } else {
+ app->polling_required = false;
+ }
+}
+
+/* This function is here to provide a way for external modules to access the functions list.
+ It will try to find a matching function base on the passed in RMI4 function number and return
+ the pointer to the struct rmi_functions if a match is found or NULL if not found.
+*/
+struct rmi_functions *rmi_find_function(int functionNum)
+{
+ struct rmi_functions *fn;
+ bool found = false;
+
+ list_for_each_entry(fn, &fns_list, link) {
+ if (functionNum == fn->functionNum) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ return NULL;
+ } else {
+ return fn;
+ }
+}
+EXPORT_SYMBOL(rmi_find_function);
+
+/* This function calls init for all of the functions on the functions list and
+ passes in the input_dev ptr so that each fn can store it for later use.
+*/
+int rmi_functions_init(struct input_dev *inputdev)
+{
+ int retval = 0;
+ struct rmi_functions *fn;
+
+ /* Set input device specific params for each data source...*/
+ list_for_each_entry(fn, &fns_list, link) {
+ if (fn->init) {
+ fn->input = inputdev; /* store the input_dev ptr for use later */
+ retval = fn->init(fn->input);
+ } else {
+ /* the developer did not add in the pointer to the init function into rmi4_supported_data_src_functions */
+ printk(KERN_ERR "rmi_core:rmi_functions_init - no init function for function 0x%x\n", fn->functionNum);
+ }
+ }
+
+ return retval;
+}
+EXPORT_SYMBOL(rmi_functions_init);
+
+int rmi_register_phys_driver(struct rmi_phys_driver *rpd)
+{
+ struct rmi_application *app;
+ int i;
+ unsigned char std_queries[21];
+ unsigned char interruptCount;
+ struct rmi_function_info *rfi;
+ struct rmi_function_descriptor rmi_fd;
+ struct rmi_functions *fn;
+ bool found;
+ int retval;
+
+ if (!rpd->name) {
+ printk(KERN_ERR "%s: Physical driver must specify a name\n", drvname);
+ return -EINVAL;
+ }
+ if (!rpd->write) {
+ printk(KERN_ERR "%s: Physical driver %s must specify a writer.\n", drvname, rpd->name);
+ return -EINVAL;
+ }
+ if (!rpd->read) {
+ printk(KERN_ERR "%s: Physical driver %s must specify a reader.\n", drvname, rpd->name);
+ return -EINVAL;
+ }
+ if (!rpd->write_multiple) {
+ printk(KERN_ERR "%s: Physical driver %s must specify a multiple writer.\n", drvname, rpd->name);
+ return -EINVAL;
+ }
+ if (!rpd->read_multiple) {
+ printk(KERN_ERR "%s: Physical driver %s must specify a multiple reader.\n", drvname, rpd->name);
+ return -EINVAL;
+ }
+ if (!rpd->module) {
+ printk(KERN_ERR "%s: Physical driver %s must specify a module.\n", drvname, rpd->name);
+ return -EINVAL;
+ }
+
+ pr_debug("%s: Registering phys driver %s\n", drvname, rpd->name);
+
+ rpd->attention = 0;
+
+ /* Get some information from the device */
+ {
+ pr_debug(KERN_INFO "%s: Functions:\n", drvname);
+
+ interruptCount = 0;
+
+ /* init the physical drivers RMI module info list of functions */
+ INIT_LIST_HEAD(&rpd->rmi.functions);
+
+ /* 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 = rpd->read_multiple(rpd, i, (char *)&rmi_fd, sizeof(rmi_fd));
+ if (!retval) {
+ rfi = NULL;
+
+ if (rmi_fd.functionNum) {
+ switch (rmi_fd.functionNum & 0xff) {
+ case 0x01:
+ pr_debug("%s: Fn $01 Found - RMI Device Control\n", drvname);
+ /* Save Fn $01 query and control base addresses since
+ we'll need them later to get/set properties and check interrupts.
+ There is only one Fn $01 for the device that is used to control
+ and query device specific info so we only need to save it
+ globally here for later use. */
+ fn01QueryBaseAddr = rmi_fd.queryBaseAddr;
+ fn01ControlBaseAddr = rmi_fd.controlBaseAddr;
+ break;
+
+ default:
+ if (rmi_fd.interruptSrcCnt) {
+ rfi = kmalloc(sizeof(*rfi), GFP_KERNEL);
+
+ if (!rfi) {
+ printk(KERN_ERR "%s: could not allocate memory for function 0x%x\n",
+ drvname, rmi_fd.functionNum);
+ retval = -ENOMEM;
+ goto exit_fail;
+ } else {
+ INC_ALLOC_STAT(rfi);
+
+ /* Get the ptr to the detect function based on the function number */
+ found = false;
+ list_for_each_entry(fn, &fns_list, link) {
+ /* check if function number matches - if so call that detect function */
+ if (fn->functionNum == rmi_fd.functionNum) {
+ found = true;
+ fn->detect(rpd->app, rfi, &rmi_fd, interruptCount);
+ }
+ }
+
+ if (!found) {
+ printk(KERN_ERR "%s: could not find support for function 0x%x\n",
+ drvname, rmi_fd.functionNum);
+ }
+ }
+ } else {
+ printk(KERN_INFO "%s: Found Function %02x - Ignored.\n", drvname, rmi_fd.functionNum & 0xff);
+ }
+ break;
+ }
+
+ /* bump interrupt count for next iteration */
+ interruptCount += (rmi_fd.interruptSrcCnt & 0x7);
+
+ /* We only want to add functions to the list that have data associated with them. */
+ if (rfi && rmi_fd.interruptSrcCnt) {
+ pr_debug("%s: Adding function 0x%x with %d sources. \n", drvname, rfi->functionNum, rfi->numSources);
+
+ /* link this function info to the RMI module infos list of functions */
+ mutex_lock(&rfi_mutex);
+ list_add_tail(&rfi->link, &rpd->rmi.functions);
+ mutex_unlock(&rfi_mutex);
+ }
+ } else {
+ /* A zero in the function number signals the end of the PDT */
+ pr_debug("%s: Found End of PDT\n", drvname);
+ break;
+ }
+ } else {
+ /* failed to read next PDT entry - end PDT scan - this may result
+ in an incomplete set of recognized functions - should probably
+ return an error but the driver may still be viable for diagnostics
+ and debugging so let's let it continue. */
+ printk(KERN_ERR "%s: Read Error 0x%x when reading next PDT entry - ending PDT scan.\n", drvname, retval);
+ break;
+ }
+ }
+
+ /* calculate the interrupt register count - used in the ISR to read the correct number of interrupt registers */
+ interruptRegisterCount = (interruptCount + 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 = rpd->read_multiple(rpd, fn01QueryBaseAddr, std_queries, sizeof(std_queries));
+ if (retval) {
+ printk(KERN_ERR "%s: Fail reading queries\n", drvname);
+ retval = -EIO;
+ goto exit_fail;
+ }
+
+ rpd->rmi.rmi_maj_ver = 4; /* Currently supported RMI version is 4.0 */
+ rpd->rmi.rmi_min_ver = 0;
+
+ /* get manufacturer id, properties, product info, date code, tester id, serial num and product id (name) */
+ rpd->rmi.mfgid = std_queries[0];
+ rpd->rmi.properties = std_queries[1];
+
+ rpd->rmi.prod_info[0] = std_queries[2];
+ rpd->rmi.prod_info[1] = std_queries[3];
+
+ rpd->rmi.date_code[0] = std_queries[4] & 0x1f; /* year - 2001-2032 */
+ rpd->rmi.date_code[1] = std_queries[5] & 0x0f; /* month - 1-12 */
+ rpd->rmi.date_code[2] = std_queries[6] & 0x1f; /* day - 1-31 */
+
+ rpd->rmi.tester_id = ((std_queries[7] & 0x7f) << 8) | (std_queries[8] & 0x7f);
+
+ rpd->rmi.serial_num = ((std_queries[9] & 0x7f) << 8) | (std_queries[10] & 0x7f);
+
+ memcpy(rpd->rmi.prod_id, &std_queries[11], 10);
+ rpd->rmi.prod_id[10] = 0;
+
+ pr_debug("%s: RMI Protocol: %d.%d\n",
+ drvname, rpd->rmi.rmi_maj_ver, rpd->rmi.rmi_min_ver);
+ pr_debug("%s: Manufacturer: %d", drvname,
+ rpd->rmi.mfgid);
+
+ if (rpd->rmi.mfgid == 1) {
+ pr_debug(" (Synaptics)");
+ }
+ pr_debug("\n");
+
+ pr_debug("%s: Properties: 0x%x \n", drvname, rpd->rmi.properties);
+ pr_debug("%s: Product Info: 0x%x 0x%x \n", drvname, rpd->rmi.prod_info[0], rpd->rmi.prod_info[1]);
+ pr_debug("%s: Date Code: Year : %d Month: %d Day: %d\n", drvname, rpd->rmi.date_code[0],
+ rpd->rmi.date_code[1], rpd->rmi.date_code[2]);
+ pr_debug("%s: Tester ID: %d \n", drvname, rpd->rmi.tester_id);
+ pr_debug("%s: Serial Number: 0x%x \n", drvname, rpd->rmi.serial_num);
+ pr_debug("%s: Product ID: %s\n", drvname, rpd->rmi.prod_id);
+ }
+
+ /* Add physical driver struct to list */
+ mutex_lock(&phys_drivers_mutex);
+ list_add_tail(&rpd->drivers, &phys_drivers);
+ mutex_unlock(&phys_drivers_mutex);
+
+ /* Do a probe for any applications that are registered and bind this physical driver to them */
+ list_for_each_entry(app, &app_drivers, apps) {
+ /* Only check apps that are not already bound */
+ if (!app->rpd) {
+ match_and_bind(app, rpd);
+ }
+ }
+
+ pr_debug("Registered phys driver %s\n", rpd->name);
+
+ return 0;
+
+exit_fail:
+ return retval;
+}
+EXPORT_SYMBOL(rmi_register_phys_driver);
+
+int rmi_unregister_phys_driver(struct rmi_phys_driver *rpd)
+{
+ if (rpd->app) {
+ printk(KERN_WARNING "%s: WARNING: unregister of %s while %s still attached\n",
+ drvname, rpd->name, rpd->app->name);
+ }
+
+ pr_debug("Unregistering phys driver %s\n", rpd->name);
+ mutex_lock(&phys_drivers_mutex);
+ list_del(&rpd->drivers);
+ mutex_unlock(&phys_drivers_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL(rmi_unregister_phys_driver);
+
+struct rmi_application *rmi_register_application(const char *name,
+ void (*attention)(struct rmi_phys_driver *pd, int instance),
+ int (*probe)(struct rmi_application *app,
+ const struct rmi_module_info *rmi),
+ void (*config)(struct rmi_application *app))
+{
+ struct rmi_application *app;
+ struct rmi_phys_driver *rpd;
+
+ if (!name) {
+ printk(KERN_ERR "%s: Application driver must specify a name\n", drvname);
+ return 0;
+ }
+
+ if (!attention) {
+ printk(KERN_ERR "%s: Application driver %s must specify attention notifier.\n",
+ drvname, name);
+ return 0;
+ }
+
+ if (!probe) {
+ printk(KERN_ERR "%s: Application driver %s must specify a probe function.\n",
+ drvname, name);
+ return 0;
+ }
+
+ if (!config) {
+ printk(KERN_ERR "%s: Application driver %s must specify a config function.\n",
+ drvname, name);
+ return 0;
+ }
+
+ pr_debug("Registering app driver %s\n", name);
+
+ app = kmalloc(sizeof(*app), GFP_KERNEL);
+ if (!app) {
+ printk(KERN_ERR "%s: Out of memory\n", drvname);
+ return 0;
+ }
+ INC_ALLOC_STAT(app);
+
+ app->name = name;
+ app->attention = attention;
+ app->probe = probe;
+ app->config = config;
+ app->rpd = 0;
+
+ mutex_lock(&app_drivers_mutex);
+ list_add_tail(&app->apps, &app_drivers);
+ mutex_unlock(&app_drivers_mutex);
+
+ /* Probe for any matches with physical drivers and bind them. */
+ list_for_each_entry(rpd, &phys_drivers, drivers) {
+ if (!rpd->app) {
+ match_and_bind(app, rpd);
+ }
+ }
+
+ pr_debug("Registered app driver %s (%p)\n", name, app);
+
+ return app;
+}
+EXPORT_SYMBOL(rmi_register_application);
+
+void rmi_unregister_application(struct rmi_application *app)
+{
+ struct rmi_application *tmp;
+ int found = 0;
+
+ if (!app) {
+ return;
+ }
+
+ pr_debug("Unregistering app driver %s (%p)\n", app->name, app);
+
+ list_for_each_entry(tmp, &app_drivers, apps) {
+ if (tmp == app) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ printk(KERN_ERR "%s: Removing rmi application %s: not found\n",
+ drvname, app->name);
+ return;
+ }
+
+ if (app->rpd) {
+ /* Release the phys driver so it can be unloaded. */
+ module_put(app->rpd->module);
+ app->rpd->app = 0;
+ }
+
+ list_del(&app->apps);
+ kfree(app);
+ DEC_ALLOC_STAT(app);
+
+ pr_debug("Unregistered app driver %p\n", app);
+}
+EXPORT_SYMBOL(rmi_unregister_application);
+
+static int __init rmi_core_init(void)
+{
+ int i;
+ struct rmi_functions_data *rmi4_fn;
+
+ pr_debug("Register Mapped Interface Data Layer Driver\n");
+
+ /* Initialize global list of RMI4 Functions that have data sources.
+ We need to add all new functions to this list so that we will have pointers
+ to their associated functions for init, config, report and detect. See rmi.h
+ for more details. The developer will add a new RMI4 function number in the
+ array in rmi.h and then add a new file to the build (called rmi_function_XX.c
+ where XX is the hex number for the added RMI4 function). The rest should be
+ automatic.
+ */
+
+ /* for each function number defined in rmi.h creat a new rmi_function struct and
+ initialize the pointers to the servicing functions and then add it into the
+ global list for function support.
+ */
+ for (i = 0; i < rmi4_num_supported_data_src_fns; i++) {
+ /* Add new rmi4 function struct to list */
+ struct rmi_functions *fn = kmalloc(sizeof(*fn), GFP_KERNEL);
+ if (!fn) {
+ printk(KERN_ERR "%s mod_init: could not allocate memory for rmi_function struct for function 0x%x\n",
+ drvname, rmi4_supported_data_src_functions[i].functionNumber);
+ return -ENOMEM;
+ } else {
+ INC_ALLOC_STAT(fn);
+
+ rmi4_fn = &rmi4_supported_data_src_functions[i];
+ fn->functionNum = rmi4_fn->functionNumber;
+ /* Fill in ptrs to functions. The functions are linked in from a file
+ called rmi_function_xx.c where xx is the hex number of the RMI4 function
+ from the RMI4 spec. Also, the function prototypes need to be added to
+ rmi_function_xx.h - also where xx is the hex number of the RMI4 function.
+ So that you don't get compile errors and that new header needs to be
+ included in the rmi.h header file.
+ */
+ fn->report = rmi4_fn->reportFn;
+ fn->config = rmi4_fn->configFn;
+ fn->init = rmi4_fn->initFn;
+ fn->detect = rmi4_fn->detectFn;
+
+ /* Add the new fn to the global list */
+ mutex_lock(&fns_mutex);
+ list_add_tail(&fn->link, &fns_list);
+ mutex_unlock(&fns_mutex);
+ }
+ }
+
+ return 0;
+}
+
+static void __exit rmi_core_exit(void)
+{
+ struct rmi_application *app, *apptmp;
+
+ /* These lists should be empty, but just in case . . . */
+ mutex_lock(&app_drivers_mutex);
+ list_for_each_entry_safe(app, apptmp, &app_drivers, apps) {
+ list_del(&app->apps);
+ kfree(app);
+ DEC_ALLOC_STAT(app);
+ }
+ mutex_unlock(&app_drivers_mutex);
+
+ CHECK_ALLOC_STAT(app);
+}
+
+/* TODO: Investigat implimenting "rmi" bus and device and driver on that bus
+ as per Documentation/driver-model/bus.txt */
+
+module_init(rmi_core_init);
+module_exit(rmi_core_exit);
+
+MODULE_AUTHOR("Synaptics, Inc.");
+MODULE_DESCRIPTION("RMI4 Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/rmi_core.h b/drivers/input/touchscreen/rmi_core.h
new file mode 100755
index 0000000..67f7a01
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_core.h
@@ -0,0 +1,57 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) Data Layer Core Header.
+ * Copyright (c) 2007-2009 Synaptics Incorporated.
+ *
+ */
+/*
+ *
+ * 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 _RMI_CORE_H
+#define _RMI_CORE_H
+
+struct rmi_application {
+ const char *name;
+ void (*attention)(struct rmi_phys_driver *pd, int instance);
+ /* Probe Function
+ * This function is called to give the application layer an
+ * opportunity to claim an RMI device. The application layer cannot
+ * read RMI registers at this point. Defer that to the config
+ * function call which occurs immediately after a successful probe.
+ */
+ int (*probe)(struct rmi_application *app, const struct rmi_module_info *rmi);
+ /* Config Function
+ * This function is called after a successful probe. It gives the
+ * application driver an opportunity to query and/or configure an RMI
+ * device before data starts flowing.
+ */
+ void (*config)(struct rmi_application *app);
+ /* Standard kernel linked list implementation.
+ * Documentation on how to use it can be found at
+ * http://isis.poly.edu/kulesh/stuff/src/klist/.
+ */
+ struct list_head apps;
+ struct rmi_phys_driver *rpd;
+ bool polling_required;
+ struct hrtimer timer;
+ struct work_struct work;
+};
+
+#endif
+
diff --git a/drivers/input/touchscreen/rmi_function_11.c b/drivers/input/touchscreen/rmi_function_11.c
new file mode 100755
index 0000000..6e87937
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_function_11.c
@@ -0,0 +1,352 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) Function $11 support for 2D.
+ * Copyright (c) 2009 Synaptics Incorporated
+ *
+ * For every RMI4 function that has a data source - like 2D sensors, buttons, LEDs,
+ * GPIOs, etc. - the user will create a new rmi_function_xx.c file and add these
+ * functions to perform the config(), init(), report() and detect() functionality.
+ * The function pointers are then srored under the RMI function info and these
+ * functions will automatically be called by the global config(), init(), report()
+ * and detect() functions that will loop through all data sources and call the
+ * data sources functions using these functions pointed to by the function ptrs.
+ */
+/*
+ * 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/kernel.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/input.h>
+
+#include "rmi.h"
+#include "rmi_core.h"
+#include "rmi_functions.h"
+
+extern unsigned short fn01ControlBaseAddr; /* RMI4 device contorl == function 0x01 */
+
+static int sensorMaxX;
+static int sensorMaxY;
+
+/*
+ * This reads in a sample and reports the function $11 source data to the input subsystem.
+ * It is used for both polling and interrupt driven operation. This is called a lot
+ * so don't put in any informational printks since they will slow things way down!
+ */
+int FN_11_report(struct rmi_application *app, struct rmi_function_info *rfi, struct input_dev *input)
+{
+ unsigned char values[2] = {0, 0};
+ unsigned char data[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+ int fingerDownCount; /* number of touch points - fingers down in this case */
+ int X, Y, Z, W, Wy, Wx;
+ int finger;
+ int fn11FingersSupported;
+ int fn11FingerRegisters;
+ unsigned short fn11DataBaseAddr;
+ unsigned char fn11DataRegBlockSize;
+ static bool wasdown;
+
+ fingerDownCount = 0;
+
+ /* 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 = ciel(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).
+ */
+ fn11FingersSupported = rfi->numDataPoints;
+ fn11FingerRegisters = (fn11FingersSupported + 3)/4;
+
+ fn11DataBaseAddr = rfi->funcDescriptor.dataBaseAddr;
+
+ if (rmi_read_multiple(app, fn11DataBaseAddr, values, fn11FingerRegisters)) {
+ printk(KERN_ERR "RMI4 function $11 report: Could not read finger status registers 0x%x\n", fn11DataBaseAddr);
+ return 0;
+ }
+
+ /* For each finger present, read the proper number of registers to get absolute data. */
+ fn11DataRegBlockSize = rfi->dataRegBlockSize;
+
+ for (finger = 0; finger < fn11FingersSupported; finger++) {
+ int reg;
+ int fingerShift;
+ int fingerStatus;
+
+ reg = finger/4; /* determine which data byte the finger status is in */
+ fingerShift = (finger % 4) * 2; /* determine bit shift to get that fingers status */
+ fingerStatus = (values[reg] >> fingerShift) & 3;
+
+ /* if finger status indicates a finger is present then read the finger data and report it */
+ if (fingerStatus == 1 || fingerStatus == 2) {
+ fingerDownCount++; /* number of active touch points not same as number of supported fingers */
+
+ /* Read the finger data */
+ if (rmi_read_multiple(app, fn11DataBaseAddr +
+ ((finger * fn11DataRegBlockSize) + fn11FingerRegisters), data, fn11DataRegBlockSize)) {
+ printk(KERN_ERR "RMI4 function $11 report: Could not read finger data registers 0x%x\n",
+ fn11DataBaseAddr + ((finger * fn11DataRegBlockSize) + fn11FingerRegisters));
+ return 0;
+ } else {
+ X = (data[0] & 0x1f) << 4;
+ X |= data[2] & 0xf;
+ Y = (data[1] & 0x1f) << 4;
+ Y |= (data[2] >> 4) & 0xf;
+ W = data[3];
+
+ /* upper 4 bits of W are Wy, lower 4 of W are Wx */
+ Wy = (W >> 4) & 0x0f;
+ Wx = W & 0x0f;
+
+ Z = data[4];
+
+ /* if this is the first finger report normal ABS_X, ABS_Y, PRESSURE, TOOL_WIDTH events for non-MT apps.
+ Apps that support Multi-touch will ignore these events and use the MT events. Apps that don't support
+ Multi-touch will still function.
+ */
+ if (fingerDownCount == 1) {
+ input_report_abs(input, ABS_X, X);
+ input_report_abs(input, ABS_Y, Y);
+ input_report_abs(input, ABS_PRESSURE, Z);
+ input_report_abs(input, ABS_TOOL_WIDTH, max(Wx, Wy));
+ input_report_key(input, BTN_TOUCH, 1);
+ wasdown = true;
+ }
+
+ /* Report Multi-Touch events for each finger */
+ input_report_abs(input, ABS_MT_TOUCH_MAJOR, max(Wx, Wy)); /* major axis of touch area ellipse */
+ input_report_abs(input, ABS_MT_TOUCH_MINOR, min(Wx, Wy)); /* minor axis of touch area ellipse */
+ input_report_abs(input, ABS_MT_ORIENTATION, (Wx > Wy ? 1 : 0)); /* Currently only 2 supported - 1 or 0 */
+ input_report_abs(input, ABS_MT_POSITION_X, X);
+ input_report_abs(input, ABS_MT_POSITION_Y, Y);
+ input_report_abs(input, ABS_MT_TRACKING_ID, finger+1); /* Tracking ID reported but not used yet */
+ input_mt_sync(input); /* MT sync between fingers */
+ }
+ }
+ }
+
+ if (fingerDownCount) {
+ /* touch will be non-zero if we had any reported events */
+ input_sync(input); /* sync after groups of events */
+ } else {
+ /* if we had a finger down before and now we don't have any we need to send
+ a button up and a sync. */
+ if (wasdown) {
+ wasdown = false;
+ input_report_key(input, BTN_TOUCH, 0);
+ input_sync(input); /* sync after groups of events */
+ }
+ }
+
+ /* return the number of touch points - fingers down or buttons pressed */
+ return fingerDownCount;
+}
+
+int FN_11_config(struct rmi_application *app, struct rmi_function_info *rfi)
+{
+ /* For the data source - print info and do any source specific configuration. */
+ unsigned char data[14];
+ int retval = 0;
+
+ pr_debug("RMI4 function $11 config\n");
+
+ /* 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 = rmi_read_multiple(app, rfi->funcDescriptor.queryBaseAddr, data, 9);
+ if (retval) {
+ printk(KERN_ERR "RMI4 function $11 config: Could not read function query registers 0x%x\n", rfi->funcDescriptor.queryBaseAddr);
+ } else {
+ pr_debug(" Number of Fingers: %d\n", data[1] & 7);
+ pr_debug(" Is Configurable: %d\n", data[1] & (1 << 7) ? 1 : 0);
+ pr_debug(" Has Gestures: %d\n", data[1] & (1 << 5) ? 1 : 0);
+ pr_debug(" Has Absolute: %d\n", data[1] & (1 << 4) ? 1 : 0);
+ pr_debug(" Has Relative: %d\n", data[1] & (1 << 3) ? 1 : 0);
+
+ pr_debug(" Number X Electrodes: %d\n", data[2] & 0x1f);
+ pr_debug(" Number Y Electrodes: %d\n", data[3] & 0x1f);
+ pr_debug(" Maximum Electrodes: %d\n", data[4] & 0x1f);
+
+ pr_debug(" Absolute Data Size: %d\n", data[5] & 3);
+
+ pr_debug(" Has XY Dist: %d\n", data[7] & (1 << 7) ? 1 : 0);
+ pr_debug(" Has Pinch: %d\n", data[7] & (1 << 6) ? 1 : 0);
+ pr_debug(" Has Press: %d\n", data[7] & (1 << 5) ? 1 : 0);
+ pr_debug(" Has Flick: %d\n", data[7] & (1 << 4) ? 1 : 0);
+ pr_debug(" Has Early Tap: %d\n", data[7] & (1 << 3) ? 1 : 0);
+ pr_debug(" Has Double Tap: %d\n", data[7] & (1 << 2) ? 1 : 0);
+ pr_debug(" Has Tap and Hold: %d\n", data[7] & (1 << 1) ? 1 : 0);
+ pr_debug(" Has Tap: %d\n", data[7] & 1 ? 1 : 0);
+ pr_debug(" Has Palm Detect: %d\n", data[8] & 1 ? 1 : 0);
+ pr_debug(" Has Rotate: %d\n", data[8] & (1 << 1) ? 1 : 0);
+
+ retval = rmi_read_multiple(app, rfi->funcDescriptor.controlBaseAddr, data, 14);
+ if (retval) {
+ printk(KERN_ERR "RMI4 function $11 config: Could not read function control registers 0x%x\n", rfi->funcDescriptor.controlBaseAddr);
+ return retval;
+ }
+
+ /* Store these for use later...*/
+ sensorMaxX = ((data[6] & 0x1f) << 8) | ((data[7] & 0xff) << 0);
+ sensorMaxY = ((data[8] & 0x1f) << 8) | ((data[9] & 0xff) << 0);
+
+ pr_debug(" Sensor Max X: %d\n", sensorMaxX);
+ pr_debug(" Sensor Max Y: %d\n", sensorMaxY);
+ }
+
+ return retval;
+}
+
+/*
+ * Initialize any function $11 specific params and settings - input settings, device settings, etc.
+ */
+int FN_11_init(struct input_dev *input)
+{
+ pr_debug("RMI4 function $11 init\n");
+
+ /* need to init the input abs params for the 2D */
+ input->evbit[0] = BIT(EV_ABS);
+
+ /* Use the max X and max Y read from the device...*/
+ input_set_abs_params(input, ABS_X, 0, sensorMaxX, 0, 0);
+ input_set_abs_params(input, ABS_Y, 0, sensorMaxY, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_X, 0, sensorMaxX, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, sensorMaxY, 0, 0);
+
+ input_set_abs_params(input, ABS_PRESSURE, 0, 255, 0, 0);
+ input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 15, 0, 0);
+
+ input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 15, 0, 0);
+ input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 15, 0, 0);
+ input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
+ input_set_abs_params(input, ABS_MT_TRACKING_ID, 1, 10, 0, 0);
+
+ return 0;
+}
+
+int FN_11_detect(struct rmi_application *app, struct rmi_function_info *rfi,
+ struct rmi_function_descriptor *fd, unsigned int interruptCount)
+{
+ char fn11Queries[9];
+ int i;
+ unsigned short fn11InterruptOffset;
+ unsigned char fn11AbsDataSize;
+ unsigned char fn11AbsDataBlockSize;
+ int fn11HasPinch, fn11HasFlick, fn11HasTap;
+ int fn11HasTapAndHold, fn11HasDoubleTap;
+ int fn11HasEarlyTap, fn11HasPress;
+ int fn11HasPalmDetect, fn11HasRotate;
+ int fn11HasRel;
+ unsigned char f11_egr_0, f11_egr_1;
+ unsigned int fn11AllDataBlockSize;
+ int retval = 0;
+
+ pr_debug("RMI4 function $11 detect\n");
+
+ /* Store addresses - used elsewhere to read data, control, query, etc. */
+ rfi->funcDescriptor.queryBaseAddr = fd->queryBaseAddr;
+ rfi->funcDescriptor.commandBaseAddr = fd->commandBaseAddr;
+ rfi->funcDescriptor.controlBaseAddr = fd->controlBaseAddr;
+ rfi->funcDescriptor.dataBaseAddr = fd->dataBaseAddr;
+ rfi->funcDescriptor.interruptSrcCnt = fd->interruptSrcCnt;
+ rfi->funcDescriptor.functionNum = fd->functionNum;
+
+ rfi->numSources = fd->interruptSrcCnt;
+
+ /* 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 = rmi_read_multiple(app, fd->queryBaseAddr, fn11Queries, sizeof(fn11Queries));
+ if (retval) {
+ printk(KERN_ERR "RMI4 function $11 detect: Could not read function query registers 0x%x\n", rfi->funcDescriptor.queryBaseAddr);
+ return retval;
+ }
+
+ /* 2D data sources have only 3 bits for the number of fingers supported - so the encoding is a bit wierd. */
+ rfi->numDataPoints = 2; /* default number of fingers supported */
+ if ((fn11Queries[1] & 0x7) <= 4)
+ rfi->numDataPoints = (fn11Queries[1] & 0x7) + 1; /* add one since zero based */
+ else {
+ if ((fn11Queries[1] & 0x7) == 5) /* 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). */
+ rfi->numDataPoints = 10;
+ }
+
+ /* Need to get interrupt info to be used later when handling interrupts. */
+ rfi->interruptRegister = (interruptCount + 7)/8;
+
+ /* loop through interrupts for each source in fn $11 and or in a bit to the interrupt mask for each. */
+ fn11InterruptOffset = interruptCount % 8;
+
+ for (i = fn11InterruptOffset; i < ((fd->interruptSrcCnt & 0x7) + fn11InterruptOffset); i++) {
+ rfi->interruptMask |= 1 << i;
+ }
+
+ /* Size of just the absolute data for one finger */
+ fn11AbsDataSize = fn11Queries[5] & 0x03;
+ fn11AbsDataBlockSize = 3 + (2 * (fn11AbsDataSize == 0 ? 1 : 0)); /* One each for X and Y, one for LSB for X & Y, one for W, one for Z */
+ rfi->dataRegBlockSize = fn11AbsDataBlockSize;
+
+ /* 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. */
+ f11_egr_0 = fn11Queries[7];
+ f11_egr_1 = fn11Queries[8];
+
+ /* Get info about what EGR data is supported, whether it has Relative data supported, etc. */
+ fn11HasPinch = f11_egr_0 & 0x40;
+ fn11HasFlick = f11_egr_0 & 0x10;
+ fn11HasTap = f11_egr_0 & 0x01;
+ fn11HasTapAndHold = f11_egr_0 & 0x02;
+ fn11HasDoubleTap = f11_egr_0 & 0x04;
+ fn11HasEarlyTap = f11_egr_0 & 0x08;
+ fn11HasPress = f11_egr_0 & 0x20;
+ fn11HasPalmDetect = f11_egr_1 & 0x01;
+ fn11HasRotate = f11_egr_1 & 0x02;
+ fn11HasRel = fn11Queries[1] & 0x08;
+
+ /* Size of all data including finger status, absolute data for each finger, relative data and EGR data */
+ fn11AllDataBlockSize =
+ /* finger status, four fingers per register */
+ ((rfi->numDataPoints + 3) / 4) +
+ /* absolute data, per finger times number of fingers */
+ (fn11AbsDataBlockSize * rfi->numDataPoints) +
+ /* two relative registers (if relative is being reported) */
+ 2 * fn11HasRel +
+ /* F11_2D_Data8 is only present if the egr_0 register is non-zero. */
+ !!(f11_egr_0) +
+ /* F11_2D_Data9 is only present if either egr_0 or egr_1 registers are non-zero. */
+ (f11_egr_0 || f11_egr_1) +
+ /* F11_2D_Data10 is only present if EGR_PINCH or EGR_FLICK of egr_0 reports as 1. */
+ !!(fn11HasPinch | fn11HasFlick) +
+ /* F11_2D_Data11 and F11_2D_Data12 are only present if EGR_FLICK of egr_0 reports as 1. */
+ 2 * !!(fn11HasFlick);
+
+ /* Disable Interrupts. It is up to the Application Driver to
+ * turn them on when it's ready for them. */
+ retval = rmi_write(app, fn01ControlBaseAddr + 1 + rfi->interruptRegister, 0);
+ if (!retval) {
+ printk(KERN_ERR "Function $11 Interrupt Disable Fail: %d\n", retval);
+ }
+
+ return retval;
+}
diff --git a/drivers/input/touchscreen/rmi_function_11.h b/drivers/input/touchscreen/rmi_function_11.h
new file mode 100755
index 0000000..546e18e
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_function_11.h
@@ -0,0 +1,39 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) Function $11 support for 2D.
+ * Copyright (c) 2009 Synaptics Incorporated
+ *
+ * For every RMI4 function that has a data source - like 2D sensors, buttons, LEDs,
+ * GPIOs, etc. - the user will create a new rmi_function_xx.c file and add these
+ * functions to perform the config(), init(), report() and detect() functionality.
+ * The function pointers are then stored under the RMI function info and these
+ * functions will automatically be called by the global config(), init(), report()
+ * and detect() functions that will loop through all data sources and call the
+ * data sources functions using these functions pointed to by the function ptrs.
+ */
+/*
+ * 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 _RMI_FUNCTION_11_H
+#define _RMI_FUNCTION_11_H
+
+int FN_11_report(struct rmi_application *app, struct rmi_function_info *rfi, struct input_dev *input);
+int FN_11_config(struct rmi_application *app, struct rmi_function_info *rfi);
+int FN_11_init(struct input_dev *input);
+int FN_11_detect(struct rmi_application *app, struct rmi_function_info *rfi, struct rmi_function_descriptor *fd, unsigned int interruptCount);
+
+#endif
diff --git a/drivers/input/touchscreen/rmi_functions.h b/drivers/input/touchscreen/rmi_functions.h
new file mode 100644
index 0000000..2553ba4
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_functions.h
@@ -0,0 +1,109 @@
+
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) Functions Definition Header File.
+ * Copyright (c) 2007-2009 Synaptics Incorporated
+ *
+ *
+ */
+/*
+ * 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 _RMI_FUNCTIONS_H
+#define _RMI_FUNCTIONS_H
+
+/* This struct is for creating a list of RMI4 functions that have data sources
+ associated with them. This is to facilitate adding new support for other
+ data sources besides 2D sensors.
+ To add a new data source support, the developer will create a new file
+ and add these 4 functions below with FN$## in front of the names - where
+ ## is the hex number for the function taken from the RMI4 specification.
+
+ The function number will be associated with this and later will be used to
+ match the RMI4 function to the 4 functions for that RMI4 function number.
+
+ The user will also have to add code that adds the new rmi_functions item
+ to the global list of RMI4 functions and stores the pointers to the 4 functions
+ in the function pointers.
+*/
+struct rmi_functions {
+ unsigned char functionNum;
+
+ struct input_dev *input;
+
+ /* Ptrs to function specific functions for report, config, init and detect. */
+ /* These ptrs. need to be filled in for every RMI4 function that has data
+ source(s) associated with it - like fn $11 (2D sensors), fn $19 (buttons),
+ etc. Each RMI4 function that has data sources will be added into a list
+ that is used to match the function number against the number stored here.
+ */
+ int (*report)(struct rmi_application *app, struct rmi_function_info *rfi, struct input_dev *input);
+ int (*config)(struct rmi_application *app, struct rmi_function_info *rfi);
+ int (*init)(struct input_dev *input);
+ int (*detect)(struct rmi_application *app, struct rmi_function_info *rfi, struct rmi_function_descriptor *fd, unsigned int interruptCount);
+
+ /* Standard kernel linked list implementation.
+ * Documentation on how to use it can be found at
+ * http://isis.poly.edu/kulesh/stuff/src/klist/.
+ */
+ struct list_head link;
+};
+
+
+/* Each time a new RMI4 function support is added the developer needs to bump the number of
+ supported data src functions and add the info for that RMI4 function to the array along
+ with pointers to the report, config, init and detect functions that they coded in rmi_function_xx.c
+ and rmi_function_xx.h - where xx is the RMI4 function number for the new RMI4 data source function.
+ The information for the RMI4 functions is obtained from the RMI4 specification document.
+*/
+#define rmi4_num_supported_data_src_fns 1
+
+/* add hdr files for all prototypes for RMI4 data source functions being supported */
+#include "rmi_function_11.h"
+/* #include "rmi_function_19.h" */
+
+typedef int(*reportFuncPtr)(struct rmi_application *app, struct rmi_function_info *rfi, struct input_dev *input);
+typedef int(*configFuncPtr)(struct rmi_application *app, struct rmi_function_info *rfi);
+typedef int(*initFuncPtr)(struct input_dev *input);
+typedef int(*detectFuncPtr)(struct rmi_application *app, struct rmi_function_info *rfi, struct rmi_function_descriptor *fd, unsigned int interruptCount);
+
+struct rmi_functions_data {
+ int functionNumber;
+ reportFuncPtr reportFn;
+ configFuncPtr configFn;
+ initFuncPtr initFn;
+ detectFuncPtr detectFn;
+};
+
+/* NOTE: Developer - add in any new RMI4 fn data info - function number and ptrs to report, config, init and detect functions.
+ This data is used to point to the functions that need to be called to config, init, detect and report data for the
+ new RMI4 function. These only need to be added for RMI4 functions that support data source - like 2D sensors, buttons,
+ LEDs, GPIOs, etc. Refer to the RMI4 specification for information on these RMI4 functions and what data they report.
+*/
+
+struct rmi_functions_data rmi4_supported_data_src_functions[rmi4_num_supported_data_src_fns] = {
+ /* Fn $11 */
+ {0x11, FN_11_report, FN_11_config, FN_11_init, FN_11_detect},
+ /* Fn $19 */
+ /* {0x19, FN_19_report, FN_19_config, FN_19_init, FN_19_detect), */
+};
+
+struct rmi_functions *rmi_find_function(int functionNum);
+int rmi_functions_init(struct input_dev *inputdev);
+
+#endif
diff --git a/drivers/input/touchscreen/rmi_i2c.h b/drivers/input/touchscreen/rmi_i2c.h
new file mode 100755
index 0000000..69b3317
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_i2c.h
@@ -0,0 +1,54 @@
+/**
+ *
+ * Synaptics RMI over I2C Physical Layer Driver Header File.
+ * Copyright (c) 2007-2009 Synaptics Incorporated
+ *
+ */
+/*
+ * 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 _RMI_I2C_H
+#define _RMI_I2C_H
+
+/* Platform-specific configuration data.
+ * This structure is used by the platform-specific driver to designate
+ * specific information about the hardware. A platform client may supply
+ * an array of these to the rmi_phys_i2c driver.
+ */
+struct rmi_i2c_clientdata {
+ /* The seven-bit i2c address of the device. */
+ int i2c_address;
+ /* The number of the irq. Set to zero if polling is required. */
+ int irq;
+ /* The type of the irq (e.g., IRQF_TRIGGER_FALLING).Only valid if irq != 0 */
+ int irq_type;
+ /* Function used to query the state of the attention line. It always
+ * returns 1 for "active" regardless of the polarity of the attention line.
+ */
+ int (*get_attention)(void);
+};
+
+/* Descriptor structure.
+ * Describes the number of i2c devices on the bus that speak RMI.
+ */
+struct rmi_i2c_data {
+ int num_clients;
+ struct rmi_i2c_clientdata *clientdata;
+};
+
+#endif
diff --git a/drivers/input/touchscreen/rmi_i2c_gta01.c b/drivers/input/touchscreen/rmi_i2c_gta01.c
new file mode 100755
index 0000000..6a3c470
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_i2c_gta01.c
@@ -0,0 +1,122 @@
+/**
+ *
+ * Synaptics RMI4 Support for I2C the OpenMoko phone (GTA01) hardware platform.
+ * Copyright (c) 2007-2009 Synaptics, Inc.
+ *
+ * To support a different device - for example if the GPIOs are different or
+ * different hardware is being used - make a copy of this file and change the
+ * name to reflect the new hardware platform then modify it to support the new
+ * platforms hardware (interrupts, IC chip, etc.).
+ *
+ */
+/*
+ * 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/module.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <asm/gpio.h>
+#include "rmi_i2c.h"
+
+/* Set this to either 1 or 0 depending on your clearpad hardware. */
+#define ATTENTION_ACTIVE_LOW 1
+
+#if ATTENTION_ACTIVE_LOW
+#define IRQ_TRIGGER IRQF_TRIGGER_FALLING
+#else
+#define IRQ_TRIGGER IRQF_TRIGGER_RISING
+#endif
+
+#define GPF3 S3C2410_GPF3
+#define GPF3INT3 S3C2410_GPF3_EINT3
+#define IRQINT3 IRQ_EINT3
+
+#define GPIO_CFG s3c2410_gpio_cfgpin(S3C2410_GPF3, S3C2410_GPF3_EINT3)
+
+static int
+get_attention(void)
+{
+#if ATTENTION_ACTIVE_LOW
+ return gpio_get_value_cansleep(GPF3) ? 0 : 1;
+#else
+ return gpio_get_value_cansleep(GPF3) ? 1 : 0;
+#endif
+}
+
+static struct rmi_i2c_clientdata rmi_test_clientdata[] = {
+ [0] = {
+ .i2c_address = 0x20,
+ .irq = IRQINT3,
+ .irq_type = IRQ_TRIGGER,
+ .get_attention = get_attention,
+ },
+};
+
+static struct rmi_i2c_data rmi_client_data = {
+ .num_clients = ARRAY_SIZE(rmi_test_clientdata),
+ .clientdata = rmi_test_clientdata,
+};
+
+static void
+rmi_i2c_release(struct device *dev)
+{
+ struct platform_device *pd = container_of(dev, struct platform_device, dev);
+
+ kfree(pd);
+}
+
+static struct platform_device *gta01_rmi_device;
+
+/*
+ * These are the module insert and remove functions.
+ */
+static int __init
+mod_init(void)
+{
+ struct platform_device *pd;
+
+ pr_debug("GTA01 RMI4 Platform Driver Init.\n");
+
+ gta01_rmi_device = pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd)
+ return -ENOMEM;
+
+ /* Set up the GPIO for interrupts */
+ GPIO_CFG;
+
+ pd->name = "rmi4-i2c";
+ pd->id = -1;
+ pd->dev.platform_data = &rmi_client_data;
+ pd->dev.release = rmi_i2c_release;
+
+ return platform_device_register(pd);
+}
+
+static void __exit
+mod_exit(void)
+{
+ return platform_device_unregister(gta01_rmi_device);
+}
+
+module_init(mod_init);
+module_exit(mod_exit);
+
+MODULE_AUTHOR("Synaptics, Inc.");
+MODULE_DESCRIPTION("GTA01 (OpenMoko Phone) RMI4 over I2C Device Configuration");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/rmi_phys_i2c.c b/drivers/input/touchscreen/rmi_phys_i2c.c
new file mode 100755
index 0000000..620ccef
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_phys_i2c.c
@@ -0,0 +1,545 @@
+/**
+ *
+ * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver.
+ * Copyright (c) 2007-2009, Synaptics Incorporated
+ *
+ */
+/*
+ * 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/module.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include "rmi_i2c.h"
+#include "rmi.h"
+
+#define DRIVER_NAME "rmi4_i2c"
+
+/* Used to lock access to the page address.
+ */
+static DEFINE_MUTEX(page_mutex);
+
+
+static const struct i2c_device_id rmi_i2c_id_table[] = {
+ { DRIVER_NAME, 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, rmi_i2c_id_table);
+
+
+/*
+ * This is the data kept on a per instance (client) basis. This data is
+ * always accessible by using the container_of() macro of the various elements
+ * inside.
+ */
+struct instance_data {
+ int instance_no;
+ int irq;
+ struct rmi_phys_driver rpd;
+ struct i2c_client i2cclient;
+ int page;
+ int (*get_attention)(void);
+};
+
+/*
+ * RMI devices have 16-bit addressing, but some of the physical
+ * implementations (like SMBus) only have 8-bit addressing. So RMI implements
+ * a page address at 0xff of every page so we can reliable page addresses
+ * every 256 registers. This function sets the page.
+ *
+ * The page_mutex lock must be held when this function is entered.
+ *
+ * param[in] id TBD
+ * param[in] page The new page address.
+ * returns zero on success, non-zero on failure.
+ */
+int
+rmi_set_page(struct instance_data *id, unsigned int page)
+{
+ char txbuf[2];
+ int retval;
+ txbuf[0] = 0xff;
+ txbuf[1] = page;
+ retval = i2c_master_send(&id->i2cclient, txbuf, 2);
+ if (retval != 2) {
+ printk(KERN_ERR "rmi_i2c: Set page fail: %d\n", retval);
+ } else {
+ retval = 0;
+ id->page = page;
+ }
+ return retval;
+}
+
+/*
+ * Read a single register through i2c.
+ *
+ * param[in] pd TBD
+ * param[in] address The address at which to start the data read.
+ * param[out] valp Pointer to the buffer where the data will be stored.
+ * returns xero upon success (with the byte read in valp), non-zero upon error.
+ */
+static int
+rmi_i2c_read(struct rmi_phys_driver *pd, unsigned short address, char *valp)
+{
+ struct instance_data *id = container_of(pd, struct instance_data, rpd);
+ char txbuf[2];
+ int retval = 0;
+ int retry_count = 0;
+
+ /* Can't have anyone else changing the page behind our backs */
+ mutex_lock(&page_mutex);
+
+ if (((address >> 8) & 0xff) != id->page) {
+ /* Switch pages */
+ retval = rmi_set_page(id, ((address >> 8) & 0xff));
+ if (retval) {
+ goto exit;
+ }
+ }
+
+retry:
+ txbuf[0] = address & 0xff;
+ retval = i2c_master_send(&id->i2cclient, txbuf, 1);
+
+ if (retval != 1) {
+ printk(KERN_ERR "rmi_i2c.rmi_i2c_read: Write fail: %d\n",
+ retval);
+ goto exit;
+ }
+ retval = i2c_master_recv(&id->i2cclient, txbuf, 1);
+
+ if (retval != 1) {
+ if (++retry_count == 5) {
+ printk(KERN_ERR "rmi_i2c.rmi_i2c_read: "
+ "Read of 0x%04x fail: %d\n", address, retval);
+ } else {
+ mdelay(10);
+ rmi_set_page(id, ((address >> 8) & 0xff));
+ goto retry;
+ }
+ } else {
+ retval = 0;
+ *valp = txbuf[0];
+ }
+exit:
+ mutex_unlock(&page_mutex);
+ return retval;
+}
+
+/*
+ * Same as rmi_i2c_read, except that multiple bytes are allowed to be read.
+ *
+ * param[in] pd TBD
+ * param[in] address The address at which to start the data read.
+ * param[out] valp Pointer to the buffer where the data will be stored. This
+ * buffer must be at least size bytes long.
+ * param[in] size The number of bytes to be read.
+ * returns zero upon success (with the byte read in valp), non-zero upon error.
+ *
+ */
+static int
+rmi_i2c_read_multiple(struct rmi_phys_driver *pd, unsigned short address,
+ char *valp, int size)
+{
+ struct instance_data *id = container_of(pd, struct instance_data, rpd);
+ char txbuf[2];
+ int retval = 0;
+ int retry_count = 0;
+
+ /* Can't have anyone else changing the page behind our backs */
+ mutex_lock(&page_mutex);
+
+ if (((address >> 8) & 0xff) != id->page) {
+ /* Switch pages */
+ retval = rmi_set_page(id, ((address >> 8) & 0xff));
+ if (retval) {
+ goto exit;
+ }
+ }
+
+retry:
+ txbuf[0] = address & 0xff;
+ retval = i2c_master_send(&id->i2cclient, txbuf, 1);
+
+ if (retval != 1) {
+ printk(KERN_ERR "rmi_i2c.rmi_i2c_read: Write fail: %d\n",
+ retval);
+ goto exit;
+ }
+ retval = i2c_master_recv(&id->i2cclient, valp, size);
+
+ if (retval != size) {
+ if (++retry_count == 5) {
+ printk(KERN_ERR "rmi_2ic.rmi_i2c_read_multiple: "
+ "Read of 0x%04x size %d fail: %d\n",
+ address, size, retval);
+ } else {
+ mdelay(10);
+ rmi_set_page(id, ((address >> 8) & 0xff));
+ goto retry;
+ }
+ } else {
+ retval = 0;
+ }
+exit:
+ mutex_unlock(&page_mutex);
+ return retval;
+}
+
+
+/*
+ * Write a single register through i2c.
+ * You can write multiple registers at once, but I made the functions for that
+ * seperate for performance reasons. Writing multiple requires allocation and
+ * freeing.
+ *
+ * param[in] pd TBD
+ * param[in] address The address at which to start the write.
+ * param[in] data The data to be written.
+ * returns one upon success, something else upon error.
+ */
+static int
+rmi_i2c_write(struct rmi_phys_driver *pd, unsigned short address, char data)
+{
+ struct instance_data *id = container_of(pd, struct instance_data, rpd);
+ unsigned char txbuf[2];
+ int retval = 0;
+
+ /* Can't have anyone else changing the page behind our backs */
+ mutex_lock(&page_mutex);
+
+ if (((address >> 8) & 0xff) != id->page) {
+ /* Switch pages */
+ retval = rmi_set_page(id, ((address >> 8) & 0xff));
+ if (retval) {
+ goto exit;
+ }
+ }
+
+ txbuf[0] = address & 0xff;
+ txbuf[1] = data;
+ retval = i2c_master_send(&id->i2cclient, txbuf, 2);
+
+ if (retval != 2) {
+ printk(KERN_ERR "rmi_i2c.rmi_i2c_write: Write fail: %d\n",
+ retval);
+ goto exit; /* Leave this in case we add code below */
+ }
+exit:
+ mutex_unlock(&page_mutex);
+ return retval;
+}
+
+/*
+ * Write multiple registers.
+ *
+ * param[in] pd TBD
+ * param[in] address The address at which to start the write.
+ * param[in] valp A pointer to a buffer containing the data to be written.
+ * param[in] size The number of bytes to write.
+ * returns one upon success, something else upon error.
+ */
+static int
+rmi_i2c_write_multiple(struct rmi_phys_driver *pd, unsigned short address,
+ char *valp, int size)
+{
+ struct instance_data *id = container_of(pd, struct instance_data, rpd);
+ unsigned char *txbuf;
+ unsigned char txbuf_most[16];
+ int retval = 0;
+
+ if (size < 15) {
+ /* Avoid an allocation if we can help it. */
+ txbuf = txbuf_most;
+ } else {
+ txbuf = kmalloc(size + 1, GFP_KERNEL);
+ if (!txbuf)
+ return -ENOMEM;
+ }
+
+ /* Yes, it stinks here that we have to copy the buffer */
+ {
+ int i;
+ for (i = 0; i < size; i++) {
+ txbuf[i + 1] = valp[i];
+ }
+ }
+
+ /* Can't have anyone else changing the page behind our backs */
+ mutex_lock(&page_mutex);
+
+ if (((address >> 8) & 0xff) != id->page) {
+ /* Switch pages */
+ retval = rmi_set_page(id, ((address >> 8) & 0xff));
+ if (retval) {
+ goto exit;
+ }
+ }
+
+ txbuf[0] = address & 0xff;
+ retval = i2c_master_send(&id->i2cclient, txbuf, size + 1);
+
+ if (retval != 1) {
+ printk(KERN_ERR "rmi_i2c.rmi_i2c_read: Write fail: %d\n", retval);
+ goto exit;
+ }
+exit:
+ mutex_unlock(&page_mutex);
+ if (txbuf != txbuf_most)
+ kfree(txbuf);
+ return retval;
+}
+
+/*
+ * Get the state of the attention line.
+ * This function returns 1 for an active attention regardless of the
+ * polarity of the ATTN signal. If the get_attention function of the instance
+ * is not available (probably because ATTN is not implemented), then it always
+ * returns inactive.
+ */
+static int
+rmi_i2c_get_attention(struct rmi_phys_driver *rpd)
+{
+ struct instance_data *id = container_of(rpd, struct instance_data, rpd);
+ if (id->get_attention) {
+ return id->get_attention();
+ } else {
+ return 0; /* return inactive */
+ }
+}
+
+/*
+ * This is the Interrupt Service Routine. It just notifies the application
+ * layer that attention is required.
+ */
+static irqreturn_t
+i2c_attn_isr(int irq, void *info)
+{
+ struct instance_data *id = info;
+ disable_irq(id->irq);
+ if (id->rpd.attention) {
+ id->rpd.attention(&id->rpd, id->instance_no);
+ }
+ return IRQ_HANDLED;
+}
+
+/*
+ * The Driver probe function - will allocate and initialize the instance data and
+ * request the irq and set the instance data as the clients clientdta 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
+rmi_i2c_probe(struct i2c_client *client, const struct i2c_device_id *dev_id)
+{
+ struct instance_data *id;
+ int retval = 0;
+ int i;
+ int numclients = 0;
+ struct rmi_i2c_data *rmii2cdata;
+ struct rmi_i2c_clientdata *clientdata;
+
+ pr_debug("Probing i2c RMI device\n");
+
+ /* Allocate and initialize the instance data for this client */
+ id = kzalloc(sizeof(*id) * 2, GFP_KERNEL);
+ if (!id) {
+ printk(KERN_ERR "rmi_i2c_probe: Out of memory trying to allocate instance_data.\n");
+ return -ENOMEM;
+ }
+
+ id->rpd.name = DRIVER_NAME;
+ id->rpd.write = rmi_i2c_write;
+ id->rpd.read = rmi_i2c_read;
+ id->rpd.write_multiple = rmi_i2c_write_multiple;
+ id->rpd.read_multiple = rmi_i2c_read_multiple;
+ id->rpd.get_attention = rmi_i2c_get_attention;
+ id->rpd.module = THIS_MODULE;
+ id->page = 0xffff; /* So we set the page correctly the first time */
+
+ rmii2cdata = ((struct rmi_i2c_data *)(client->dev.platform_data));
+ numclients = rmii2cdata->num_clients;
+ /* Loop through the client data and locate the one that was found */
+ for (i = 0; i < numclients; i++) {
+ clientdata = &(rmii2cdata->clientdata[i]);
+ if (client->addr == clientdata->i2c_address) {
+ id->instance_no = i;
+ id->get_attention = clientdata->get_attention;
+
+ /*
+ * Determine if we need to poll (inefficient) or use interrupts.
+ */
+ if (clientdata->irq) {
+ int irqtype;
+
+ id->irq = clientdata->irq;
+ switch (clientdata->irq_type) {
+ case IORESOURCE_IRQ_HIGHEDGE:
+ irqtype = IRQF_TRIGGER_RISING;
+ break;
+ case IORESOURCE_IRQ_LOWEDGE:
+ irqtype = IRQF_TRIGGER_FALLING;
+ break;
+ case IORESOURCE_IRQ_HIGHLEVEL:
+ irqtype = IRQF_TRIGGER_HIGH;
+ break;
+ case IORESOURCE_IRQ_LOWLEVEL:
+ irqtype = IRQF_TRIGGER_LOW;
+ break;
+ default:
+ printk(KERN_WARNING "rmi_i2c_probe: Invalid IRQ flags in "
+ "platform data\n");
+ kfree(id);
+ return -ENXIO;
+ }
+
+ retval = request_irq(id->irq, i2c_attn_isr, irqtype, "rmi_i2c", id);
+ if (retval) {
+ printk(KERN_WARNING "rmi_i2c_probe: Unable to get attn "
+ "irq %d. Reverting to polling.\n", id->irq);
+ id->rpd.polling_required = true;
+ } else {
+ pr_debug("rmi_i2c_probe: got irq\n");
+ id->rpd.polling_required = false;
+ }
+ } else {
+ id->rpd.polling_required = true;
+ printk(KERN_INFO "rmi_i2c_probe: No IRQ info given. "
+ "Polling required.\n");
+ }
+ }
+ }
+
+ /* Store the instance data in the i2c_client - we need to do this prior to calling
+ * register_physical_driver since it may use the read, write finctions.
+ */
+ i2c_set_clientdata(client, id);
+
+ /* Register physical driver - this will call the detect function that will then
+ * scan the device and determine the supported RMI4 functions.
+ */
+ retval = rmi_register_phys_driver(&id->rpd);
+ if (retval) {
+ printk(KERN_ERR "rmi_i2c_probe : Failed to Register %s phys driver\n", id->rpd.name);
+ i2c_set_clientdata(client, NULL);
+ if (id->irq) {
+ free_irq(id->irq, id);
+ }
+ kfree(id);
+ return retval;
+ }
+
+ pr_debug("rmi_i2c_probe : Successfully Registered %s phys driver\n", id->rpd.name);
+
+ return retval;
+}
+
+/*
+ * The Driver remove function. We tear down the instance data and unregister the phys driver
+ * in this call.
+ */
+static int
+rmi_i2c_remove(struct i2c_client *client)
+{
+ struct instance_data *id = i2c_get_clientdata(client);
+
+ pr_debug("Unregistering phys driver %s\n", id->rpd.name);
+
+ rmi_unregister_phys_driver(&id->rpd);
+
+ pr_debug("Unregistered phys driver %s\n", id->rpd.name);
+
+ if (id->irq) {
+ free_irq(id->irq, id);
+ }
+
+ kfree(id);
+ pr_debug("remove successful\n");
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int
+rmi_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ /* Touch sleep mode */
+ return 0;
+}
+
+static int
+rmi_i2c_resume(struct i2c_client *client)
+{
+ /* Re-initialize upon resume */
+ return 0;
+}
+#else
+#define rmi_i2c_suspend NULL
+#define rmi_i2c_resume NULL
+#endif
+
+/*
+ * This structure tells the i2c subsystem about us.
+ *
+ * TODO: we should add .suspend and .resume fns.
+ *
+ */
+static struct i2c_driver rmi_i2c_driver = {
+ .probe = rmi_i2c_probe,
+ .remove = rmi_i2c_remove,
+ .suspend = rmi_i2c_suspend,
+ .resume = rmi_i2c_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+ .id_table = rmi_i2c_id_table,
+};
+
+/*
+ * Register ourselves with i2c Chip Driver.
+ *
+ */
+static int __init rmi_phys_i2c_init(void)
+{
+ if (RMI_ALLOC_STATS) {
+ pr_debug("Allocation Stats Enabled\n");
+ }
+
+ return i2c_add_driver(&rmi_i2c_driver);
+}
+
+/*
+ * Un-register ourselves from the i2c Chip Driver.
+ *
+ */
+static void __exit rmi_phys_i2c_exit(void)
+{
+ i2c_del_driver(&rmi_i2c_driver);
+}
+
+
+module_init(rmi_phys_i2c_init);
+module_exit(rmi_phys_i2c_exit);
+
+MODULE_AUTHOR("Synaptics, Inc.");
+MODULE_DESCRIPTION("RMI4 Driver I2C Physical Layer");
+MODULE_LICENSE("GPL");
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/