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Date: Sat, 19 Dec 2009 12:49:23 -0800
From: Christopher Heiny <cheiny@...aptics.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
CC: Allie Xiong <axiong@...aptics.com>,
William Manson <WManson@...aptics.com>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: [RFC] [PATCH 1/1] input/touchscreen: Synaptics Touchscreen Driver
From: William Manson <WManson@...aptics.com>
Initial driver for Synaptics touchscreens using RMI4 protocol.
Signed-off-by: William Manson <WManson@...aptics.com>
Signed-off-by: Allie Xiong <axiong@...aptics.com>
Signed-off-by: Christopher Heiny <cheiny@...aptics.com>
index 32fc8ba..2b950f7 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -295,6 +295,19 @@ 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 f1f59c9..81f938a 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -12,7 +12,6 @@ obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o
obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o
obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o
obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o
-obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o
obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o
obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o
obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o
@@ -26,9 +25,8 @@ obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o
obj-$(CONFIG_TOUCHSCREEN_HP7XX) += jornada720_ts.o
obj-$(CONFIG_TOUCHSCREEN_HTCPEN) += htcpen.o
obj-$(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-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
@@ -44,3 +42,4 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_ATMEL) += atmel-wm97xx.o
obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o
obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o
obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
+obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
diff --git a/drivers/input/touchscreen/rmi.h
b/drivers/input/touchscreen/rmi.h
new file mode 100755
index 0000000..6caa66f
--- /dev/null
+++ b/drivers/input/touchscreen/rmi.h
@@ -0,0 +1,286 @@
+/**
+ * \file
+ * 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.
+ *
+
*#############################################################################
+ */
+
+/** 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.
+ * \see rmi_module_info
+ */
+struct rmi_function_info {
+ unsigned char functionNum;
+
+ /** This is the number of data sources associated with the function.
+ * \note This is not the total number of data registers associated with
+ * this function!
+ * \see data_regs
+ */
+ 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 $19 (buttons)it is the number of buttons.
+ */
+ unsigned char numDataPoints;
+
+ /** This is the number of data registers to read.
+ */
+ unsigned char dataRegBlockSize;
+
+ /** This is the interrupt register and mask - needed for enabling the
interrupts
+ * and for checking what source had caused the attention line interrupt.
+ */
+ unsigned char interruptRegister;
+ unsigned char interruptMask;
+
+ /** This is the RMI function descriptor associated with this function.
+ * It contains the Base addresses for the functions query, command,
+ * control, and data registers.
+ */
+ struct rmi_function_descriptor funcDescriptor;
+
+ /** Standard kernel linked list implementation.
+ * Documentation on how to use it can be found at
+ * http://isis.poly.edu/kulesh/stuff/src/klist/.
+ */
+ struct list_head link;
+};
+
+/* This struct is for creating a list of RMI4 functions that have data
sources
+ associated with them. This is to facilitate adding new support for other
+ data sources besides 2D sensors.
+
+ To add a new data source support, the developer will create a new file
+ and add these 4 functions below with FN$## 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);
+ void (*config)(struct rmi_application *app, struct rmi_function_info
*rfi);
+ void (*init)(struct input_dev *input);
+ void (*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 *, struct
rmi_function_info *, struct input_dev *);
+typedef void(*configFuncPtr)(struct rmi_application *app, struct
rmi_function_info *rfi);
+typedef void(*initFuncPtr)(struct input_dev *);
+typedef void(*detectFuncPtr)(struct rmi_application *, struct
rmi_function_info *, struct rmi_function_descriptor *, unsigned int);
+
+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), */
+
+};
+
+
+/** 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 <i>Synaptics RMI4 Interfacing
+ * Guide</i> document.
+ */
+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.
+ * You can build a product info string using the following printf
+ * format and args:
+ * \code printf("%i %02i", productInfo[0], productInfo[1]); \endcode
+ */
+ 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/.
+ * \see rmi_function_info
+ */
+ 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);
+ int polling_required;
+ /* Private elements of the structure */
+ /** 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);
+int 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("Too many " #X " frees\n"); } while(0)
+# define CHECK_ALLOC_STAT(X) \
+ do { if(X##allocsrmi) printk("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
+
+/* vim600: set noexpandtab sw=8 ts=8 :*/
diff --git a/drivers/input/touchscreen/rmi.mod.c
b/drivers/input/touchscreen/rmi.mod.c
new file mode 100755
index 0000000..e11b023
--- /dev/null
+++ b/drivers/input/touchscreen/rmi.mod.c
@@ -0,0 +1,20 @@
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+
+struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+};
+
+static const char __module_depends[]
+__attribute_used__
+__attribute__((section(".modinfo"))) =
+"depends=";
+
diff --git a/drivers/input/touchscreen/rmi_app_touchpad.c
b/drivers/input/touchscreen/rmi_app_touchpad.c
new file mode 100755
index 0000000..bc4d17f
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_app_touchpad.c
@@ -0,0 +1,458 @@
+/**
+ * \file
+ * Synaptics Register Mapped Interface (RMI4) TouchPad Application
Layer Driver.
+ * Copyright (c) 2007-2009 Synaptics Incorporated
+ *
+ *
+ * This code implements a polling mechanism with backoff as well as
+ * interrupt-driven sampling. For polling, the module has two parameters:
+ * polljif (Poll Jiffies) and hspolljif (High Speed Poll Jiffies). The
driver
+ * polls at polljif until it sees a press, and then it polls at hspolljif.
+ * When there is no longer a touch, it reverts to the polljif period.
+ *
+ * The polljif parameter can be changed during run time like this:\code
+ * echo 100 > /sys/module/rmi_app_touchpad/parameters/polljif
+ * \endcode
+ *
+ * That will change the pollrate to 1 per second (assuming HZ == 100). The
+ * same is true for hspolljif.
+ *
+ * The parameters have no effect for the interrupt-driven case.
+ *
+ * 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/kthread.h>
+#include <linux/freezer.h>
+#include <linux/input.h>
+
+#include "rmi_core.h"
+#include "rmi.h"
+
+#if RMI_ALLOC_STATS
+ static int pollallocsrmi = 0;
+#endif
+
+#define RMI_REPORT_RATE_40 (1 << 6)
+
+/** The number of jiffies between polls without touches */
+static int polljif = HZ/20;
+/** The number of jiffies between polls with touches */
+static int hspolljif = HZ/40;
+module_param(polljif, int, 0644);
+module_param(hspolljif, int, 0644);
+MODULE_PARM_DESC(polljif, "How many jiffies between low speed polls.");
+MODULE_PARM_DESC(hspolljif, "How many jiffies between high speed polls.");
+
+static struct rmi_application *app = NULL;
+static struct completion touch_completion;
+static struct completion thread_comp;
+struct task_struct *kthread = NULL;
+static int time_to_quit = 0;
+static struct input_dev *input = NULL;
+
+extern unsigned short fn01ControlBaseAddr; /* RMI4 device control ==
function 0x01 */
+extern unsigned int interruptRegisterCount; /* number of total
interrupt registers to read */
+
+extern LIST_HEAD(fns_list);
+
+/**
+ * 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 wake up the kernel sampling thread. */
+ complete(&touch_completion);
+}
+
+/**
+ * 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 = 0; /* number of touch points - fingers or buttons */
+
+ /* 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
+ */
+ struct rmi_functions *fn;
+ struct rmi_function_info *rfi;
+ struct rmi_phys_driver *rpd = app->rpd; /* get ptr to
rmi_physical_driver from app */
+ struct rmi_module_info *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 = false;
+ list_for_each_entry(fn, &fns_list, link) {
+ if (rfi->functionNum == fn->functionNum) {
+ found = true;
+ if (fn->report) {
+ touch = fn->report(app, rfi, fn->input);
+ } else {
+ /* 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);
+ 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.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 a kernel thread that processes packets when we receive them.
It is
+ * only used for the interrupt-driven case. Polling may also be done
in this
+ * driver and doesn't use this thread (although I suppose it could be
modified
+ * to do polling, too, instead of using timers).
+ */
+int rmitouchd(void *param)
+{
+ struct rmi_application *app = (struct rmi_application *)param;
+
+ daemonize("rmitouchd");
+
+ while (!kthread_should_stop()) {
+ if(time_to_quit) break;
+
+ /* wait for interrupt from ATTN line */
+ wait_for_completion_interruptible(&touch_completion);
+
+ if (time_to_quit) break;
+
+ try_to_freeze();
+
+ do {
+ report_sensor_data(app);
+ if(time_to_quit) break; /* check if time to quit so we don't
loop when we are in mod_exit(). */
+ } while(rmi_get_attn(app));
+ }
+
+ complete_and_exit(&thread_comp, 0);
+}
+
+/* Head of the list to keep track of who is polling. This is so we can
+ * properly shut down the timers on exit. */
+static struct list_head pollers;
+
+/* Simple structure to keep track of things */
+struct poll_instance {
+ struct delayed_work dw;
+ struct rmi_application *app;
+ struct list_head link;
+};
+
+/* The main routine for the polling case. */
+static void poll_work_callback(struct work_struct *data)
+{
+ struct delayed_work *dw = container_of(data, struct delayed_work, work);
+ struct poll_instance *pi = container_of(dw, struct poll_instance, dw);
+ static int calls_with_no_data = 0;
+ int touch = 0;
+
+ if(time_to_quit) return;
+
+ touch = report_sensor_data(pi->app);
+
+ /* This code implements a backoff. If we have a call with data being
+ * received, we decrease the time between polls to hspolljif. If
+ * there are several calls at that faster rate that do not have data,
+ * we go back to slower polling.
+ */
+ if(touch) calls_with_no_data = 0;
+ if(!time_to_quit) { /* Don't schedule if it's time to quit. */
+ if(calls_with_no_data > 5) {
+ schedule_delayed_work(dw, polljif);
+ } else {
+ if(!touch) calls_with_no_data++;
+ schedule_delayed_work(dw, hspolljif);
+ }
+ }
+}
+
+/**
+ * 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: %p\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. */
+ unsigned char data[14];
+ struct rmi_function_info *rfi;
+ struct rmi_phys_driver *rpd;;
+ struct rmi_module_info *rmi; /* module info has list of functions */
+
+ 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;
+
+ list_for_each_entry(fn, &fns_list, link) {
+ /* check if function number matches - if so call that config
function */
+ if(fn->functionNum == rfi->functionNum) {
+ 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 thread -
otherwise we need to
+ set up the polling callback and worker thread. */
+ if(!rmi_polling_required(app)) {
+ /* We're interrupt driven, so turn on the thread. */
+ kthread = kthread_run(&rmitouchd, app, "rmitouchd");
+
+ if(HZ < 500) {
+ /* The default polling frequency of 80 times per
+ * second is too fast (the Linux time slice for
+ * sub-GHz processors is only 100 times per second).
+ * So program it to 40.
+ */
+ rmi_write(app, fn01ControlBaseAddr, RMI_REPORT_RATE_40);
+ }
+ } else {
+ /* We're polling driven, so set up the polling callback and worker
thread */
+ struct poll_instance *pi;
+ pi = kmalloc(sizeof(*pi), GFP_KERNEL);
+
+ if(!pi) {
+ printk(KERN_ERR "rmi_app_touchpad.config: "
+ "Out of memory claiming %s\n",
+ rmi->prod_id);
+ continue;
+ }
+
+ INC_ALLOC_STAT(poll);
+ INIT_DELAYED_WORK(&pi->dw, poll_work_callback);
+
+ pi->app = app;
+ list_add_tail(&pi->link, &pollers);
+ schedule_delayed_work(&pi->dw, polljif);
+ }
+}
+
+/**
+ * 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 mod_init(void)
+{
+ printk(KERN_INFO "rmi_app_touchpad.mod_init: RMI4 TouchPad Driver\n");
+
+ INIT_LIST_HEAD(&pollers);
+
+ time_to_quit = 0;
+ init_completion(&touch_completion);
+ init_completion(&thread_comp);
+
+ /* 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...*/
+ struct rmi_functions *fn;
+ list_for_each_entry(fn, &fns_list, link) {
+ if (fn->init) {
+ fn->input = input; /* store the input_dev ptr for use later */
+ 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_app_touchpad.mod_init: no init function for
function 0x%x\n", fn->functionNum);
+ }
+ }
+
+ input_register_device(input);
+
+ 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);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * The module exit function.
+ */
+static void __exit mod_exit(void)
+{
+ struct poll_instance *pi, *pi_tmp;
+
+ printk(KERN_INFO "rmi_app_touchpad.mod_exit: RMI4 TouchPad Driver\n");
+
+ time_to_quit = 1;
+
+ complete(&touch_completion); /* Kick the thread awake */
+ list_for_each_entry(pi, &pollers, link) {
+ cancel_delayed_work(&pi->dw); /* Cancel any pending polls */
+ }
+ flush_scheduled_work(); /* Make sure all pollers are stopped */
+ if(kthread) wait_for_completion(&thread_comp);
+
+ /* Unregister everything */
+ printk(KERN_WARNING "rmi_app_touchpad.mod_exit: Unregistering app -
%s\n", app->name);
+ rmi_unregister_application(app);
+ input_unregister_device(input);
+
+ /* Free up the structures */
+ list_for_each_entry_safe(pi, pi_tmp, &pollers, link) {
+ list_del(&pi->link);
+ kfree(pi);
+ DEC_ALLOC_STAT(poll);
+ }
+
+ CHECK_ALLOC_STAT(poll);
+}
+
+/** Standard driver module information - the author of the module.
+ */
+MODULE_AUTHOR("Synaptics, Inc.");
+/** Standard driver module information - a summary description of this
module.
+ */
+MODULE_DESCRIPTION("RMI4 Driver");
+/** Standard driver module information - the license under which this
module
+ * is included in the kernel.
+ */
+MODULE_LICENSE("GPL");
+
+/** Specifies to the kernel that the mod_init() function should be
called when
+ * the module is loaded.
+ * \see mod_init()
+ */
+module_init(mod_init);
+/** Specifies to the kernel that the mod_exit() function should be
called when
+ * the module is unloaded.
+ * \see mod_exit()
+ */
+module_exit(mod_exit);
+
+/* vim600: set noexpandtab sw=8 ts=8 :*/
diff --git a/drivers/input/touchscreen/rmi_app_touchpad.mod.c
b/drivers/input/touchscreen/rmi_app_touchpad.mod.c
new file mode 100755
index 0000000..22ed454
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_app_touchpad.mod.c
@@ -0,0 +1,20 @@
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+
+struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+};
+
+static const char __module_depends[]
+__attribute_used__
+__attribute__((section(".modinfo"))) =
+"depends=rmi";
+
diff --git a/drivers/input/touchscreen/rmi_core.c
b/drivers/input/touchscreen/rmi_core.c
new file mode 100755
index 0000000..ed2127e
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_core.c
@@ -0,0 +1,627 @@
+/**
+ * \file
+ * Synaptics Register Mapped Interface (RMI4) Data Layer Driver.
+ * Copyright (C) 2007 - 2009, Synaptics Incorporated
+ *
+ *
+ * This protocol is layered as follows.
+ *
+ * <pre>
+ * +----------------------------------------+
+ * | |
+ * | Application |
+ * | |
+ * +----------------------------------------+
+ * | |
+ * | RMI4 Driver | Data Layer (THIS DRIVER)
+ * | (this file) |
+ * +-----+-----+-------+----------+---------+
+ * | I2C | SPI | SMBus | etc. | Physical Layer
+ * +-----+-----+-------+----------+---------+
+ *</pre>
+ * 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/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <asm/uaccess.h>
+
+#include "rmi.h"
+#include "rmi_core.h"
+
+
+/* we need these to control and query interrupts */
+unsigned short fn01QueryBaseAddr = 0; /* RMI4 device control */
+EXPORT_SYMBOL(fn01QueryBaseAddr);
+unsigned short fn01ControlBaseAddr = 0;
+EXPORT_SYMBOL(fn01ControlBaseAddr);
+unsigned int interruptRegisterCount = 0;
+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 LIST_HEAD(fns_list);
+EXPORT_SYMBOL(fns_list);
+static DEFINE_MUTEX(fns_mutex);
+EXPORT_SYMBOL(fns_mutex);
+static DEFINE_MUTEX(rfi_mutex);
+EXPORT_SYMBOL(rfi_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);
+
+int 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 = 0;
+ }
+}
+
+int rmi_register_phys_driver(struct rmi_phys_driver *rpd)
+{
+ struct rmi_application *app;
+ 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 */
+ {
+ int i;
+ unsigned char std_queries[21];
+ unsigned char interruptCount = 0;
+ struct rmi_function_info *rfi = NULL;
+
+
+ printk(KERN_INFO "%s: Functions:\n", drvname);
+
+ struct rmi_function_descriptor rmi_fd;
+
+ /* 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 )
+ {
+ if (!(retval = rpd->read_multiple(rpd, i, &rmi_fd, sizeof(rmi_fd))))
+ {
+ rfi = NULL;
+
+ if(rmi_fd.functionNum)
+ {
+ switch(rmi_fd.functionNum & 0xff)
+ {
+ case 0x01:
+ printk(KERN_INFO "%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 */
+ struct rmi_functions *fn;
+ bool 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, 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)
+ {
+ printk(KERN_INFO "%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_lock(&rfi_mutex);
+ }
+ } else {
+ /* A zero in the function number signals the end of the PDT */
+ printk(KERN_INFO "%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 */
+ if((retval = rpd->read_multiple(rpd, fn01QueryBaseAddr,
std_queries, sizeof(std_queries)))) {
+ 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);
+
+ for (i = 0; i < 10; i++)
+ {
+ rpd->rmi.prod_id[i] = std_queries[11+i];
+ }
+
+ rpd->rmi.prod_id[10] = 0;
+
+ printk(KERN_INFO "%s: RMI Protocol: %d.%d\n",
+ drvname, rpd->rmi.rmi_maj_ver, rpd->rmi.rmi_min_ver);
+ printk(KERN_INFO "%s: Manufacturer: %d", drvname,
+ rpd->rmi.mfgid);
+
+ if(rpd->rmi.mfgid == 1) {
+ printk(KERN_INFO " (Synaptics)");
+ }
+ printk(KERN_INFO "\n");
+
+ printk(KERN_INFO "%s: Properties: 0x%x \n", drvname,
rpd->rmi.properties);
+
+ printk(KERN_INFO "%s: Product Info: 0x%x 0x%x \n", drvname,
rpd->rmi.prod_info[0], rpd->rmi.prod_info[1]);
+
+ printk(KERN_INFO "%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]);
+
+ printk(KERN_INFO "%s: Tester ID: %d \n", drvname, rpd->rmi.tester_id);
+
+ printk(KERN_INFO "%s: Serial Number: 0x%x \n", drvname,
rpd->rmi.serial_num);
+
+ printk(KERN_INFO "%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 mod_init(void)
+{
+ printk(KERN_INFO "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]);
+ return -ENOMEM;
+ } else {
+
+ INC_ALLOC_STAT(fn);
+
+ struct rmi_functions_data * rmi4_fn =
&rmi4_suported_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 mod_exit(void)
+{
+ struct rmi_application *app, *apptmp;
+ struct rmi_function *fn, *fntmp;
+ struct rmi_function_info *rfi, *rfitmp;
+
+ /* 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);
+
+ mutex_lock(&fns_mutex);
+ list_for_each_entry_safe(fn, fntmp, &fns_list, link) {
+ list_del(&fn->link);
+ kfree(fn);
+ DEC_ALLOC_STAT(fn);
+ }
+ mutex_unlock(&fns_mutex);
+
+ mutex_lock(&rfi_mutex);
+ list_for_each_entry_safe(rfi, rfitmp, &rpd->rmi.functions, link) {
+ list_del(&fn->link);
+ kfree(fn);
+ DEC_ALLOC_STAT(rfi);
+ }
+ mutex_unlock(&rfi_mutex);
+
+
+ CHECK_ALLOC_STAT(rfi);
+ CHECK_ALLOC_STAT(fn);
+ CHECK_ALLOC_STAT(app);
+}
+
+/** Specifies to the kernel that the mod_init() function should be
called when
+ * the module is loaded.
+ * \see mod_init()
+ */
+module_init(mod_init);
+/** Specifies to the kernel that the mod_exit() function should be
called when
+ * the module is unloaded.
+ * \see mod_exit()
+ */
+module_exit(mod_exit);
+
+/** Standard driver module information - the author of the module.
+ */
+MODULE_AUTHOR("Synaptics, Inc.");
+/** Standard driver module information - a summary description of this
module.
+ */
+MODULE_DESCRIPTION("RMI4 Driver");
+/** Standard driver module information - the license under which this
module
+ * is included in the kernel.
+ */
+MODULE_LICENSE("GPL");
+
+/* vim600: set noexpandtab sw=8 ts=8 : */
diff --git a/drivers/input/touchscreen/rmi_core.h
b/drivers/input/touchscreen/rmi_core.h
new file mode 100755
index 0000000..3e38f5c
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_core.h
@@ -0,0 +1,54 @@
+/**
+ * \file
+ * Synaptics Register Mapped Interface (RMI4) Data Layer Core Header.
+ * Copyright (c) 2007-2009 Synaptics Incorporated.
+ *
+ * \note YOU SHOULD NOT NEED TO INCLUDE THIS FILE FOR PHYSICAL OR
APPLICATION
+ * LAYERS.
+ *
+ */
+/*
+ *
+ * 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.
+ *
+
*#############################################################################
+ */
+
+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;
+ int polling_required;
+};
+
+/* vim600: set noexpandtab sw=8 ts=8 : */
diff --git a/drivers/input/touchscreen/rmi_function_11.c
b/drivers/input/touchscreen/rmi_function_11.c
new file mode 100755
index 0000000..c5ebf98
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_function_11.c
@@ -0,0 +1,313 @@
+/**
+ * \file
+ * 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_core.h"
+#include "rmi.h"
+
+static int sensorMaxX = 0;
+static int sensorMaxY = 0;
+
+/**
+ * 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 touch = 0; /* number of touch points - fingers in this case */
+
+ int X = 0;
+ int Y = 0;
+ int Z = 0;
+ int W = 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).
+ */
+ int fn11FingersSupported = rfi->numDataPoints;
+ int fn11FingerRegisters = (fn11FingersSupported + 3)/4;
+
+ unsigned short 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. */
+ unsigned char fn11DataRegBlockSize = rfi->dataRegBlockSize;
+ int finger;
+ for (finger = 0; finger < fn11FingersSupported; finger++)
+ {
+ int reg = finger/4; /* determine which data byte the finger status
is in */
+ int fingerShift = (finger %4) * 2; /* determine bit shift to get
that fingers status */
+ int 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)
+ {
+ touch++; /* 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 */
+ int Wy = (W >> 4) & 0x0f;
+ int 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 (touch == 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));
+ }
+
+ /* 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_TOUCH_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 (touch) /* touch will be non-zero if we had any reported events */
+ input_sync(input); /* sync after groups of events */
+
+ /* return the number of touch points - fingers down or buttons pressed */
+ return touch;
+}
+
+static void 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];
+
+ printk(KERN_INFO "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.
+ */
+ if(rmi_read_multiple(app, rfi->funcDescriptor.queryBaseAddr, data, 9)) {
+ printk(KERN_ERR "RMI4 function $11 config: Could not read function
query registers 0x%x\n", rfi->funcDescriptor.queryBaseAddr);
+ return;
+ } else {
+ printk(KERN_INFO " Number of Fingers: %d\n", data[1] & 7);
+ printk(KERN_INFO " Is Configurable: %d\n", data[1] & (1 << 7)
? 1 : 0);
+ printk(KERN_INFO " Has Gestures: %d\n", data[1] & (1 << 5)
? 1 : 0);
+ printk(KERN_INFO " Has Absolute: %d\n", data[1] & (1 << 4)
? 1 : 0);
+ printk(KERN_INFO " Has Relative: %d\n", data[1] & (1 << 3)
? 1 : 0);
+
+ printk(KERN_INFO " Number X Electrodes: %d\n", data[2] & 0x1f);
+ printk(KERN_INFO " Number Y Electrodes: %d\n", data[3] & 0x1f);
+ printk(KERN_INFO " Maximum Electrodes: %d\n", data[4] & 0x1f);
+
+ printk(KERN_INFO " Absolute Data Size: %d\n", data[5] & 3);
+
+ printk(KERN_INFO " Has XY Dist: %d\n", data[7] & (1 << 7)
? 1 : 0);
+ printk(KERN_INFO " Has Pinch: %d\n", data[7] & (1 << 6)
? 1 : 0);
+ printk(KERN_INFO " Has Press: %d\n", data[7] & (1 << 5)
? 1 : 0);
+ printk(KERN_INFO " Has Flick: %d\n", data[7] & (1 << 4)
? 1 : 0);
+ printk(KERN_INFO " Has Early Tap: %d\n", data[7] & (1 << 3)
? 1 : 0);
+ printk(KERN_INFO " Has Double Tap: %d\n", data[7] & (1 << 2)
? 1 : 0);
+ printk(KERN_INFO " Has Tap and Hold: %d\n", data[7] & (1 << 1)
? 1 : 0);
+ printk(KERN_INFO " Has Tap: %d\n", data[7] & 1 ? 1 : 0);
+ printk(KERN_INFO " Has Palm Detect: %d\n", data[8] & 1 ? 1 : 0);
+ printk(KERN_INFO " Has Rotate: %d\n", data[8] & (1 << 1)
? 1 : 0);
+
+ if(rmi_read_multiple(app, rfi->funcDescriptor.controlBaseAddr,
data, 14)) {
+ printk(KERN_ERR "RMI4 function $11 config: Could not read
function control registers 0x%x\n", rfi->funcDescriptor.controlBaseAddr);
+ return;
+ }
+
+ /* Store these for use later...*/
+ sensorMaxX = ((data[6] & 0x1f) << 8) | ((data[7] & 0xff) << 0);
+ sensorMaxY = ((data[8] & 0x1f) << 8) | ((data[9] & 0xff) << 0);
+
+ printk(KERN_INFO " Sensor Max X: %d\n", sensorMaxX);
+ printk(KERN_INFO " Sensor Max Y: %d\n", sensorMaxY);
+ }
+}
+
+/**
+ * Initialize any function $11 specific params and settings - input
settings, device settings, etc. */
+ */
+static void FN_11_init(struct input_dev *input)
+{
+ printk(KERN_INFO "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);
+}
+
+static void FN_11_detect(struct rmi_application *app, struct
rmi_function_info *rfi,
+ struct rmi_function_descriptor *fd, unsigned int interruptCount)
+{
+ unsigned char fn11Queries[9];
+
+ printk(KERN_INFO "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. */
+ if (rpd->read_multiple(app, fd->queryBaseAddr, &fn11Queries,
sizeof(fn11Queries))) {
+ printk(KERN_ERR "RMI4 function $11 detect: Could not read function
query registers 0x%x\n", rfi->funcDescriptor.queryBaseAddr);
+ return;
+ }
+
+ /* 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 in 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. */
+ unsigned short fn11InterruptOffset = interruptCount % 8;
+ int i;
+ for (i = fn11InterruptOffset; i < ((fd->interruptSrcCnt & 0x7) +
fn11InterruptOffset); i++)
+ {
+ rfi->interruptMask |= 1 << i;
+ }
+
+ /* Size of just the absolute data for one finger */
+ unsigned char fn11AbsDataSize = fn11Queries[5] & 0x03;
+ unsigned char 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.
*/
+ unsigned char f11_egr_0 = fn11Queries[7];
+ unsigned char f11_egr_1 = fn11Queries[8];
+ int fn11HasPinch = f11_egr_0 & 0x40;
+ int fn11HasFlick = f11_egr_0 & 0x10;
+ int fn11HasTap = f11_egr_0 & 0x01;
+ int fn11HasTapAndHold = f11_egr_0 & 0x02;
+ int fn11HasDoubleTap = f11_egr_0 & 0x04;
+ int fn11HasEarlyTap = f11_egr_0 & 0x08;
+ int fn11HasPress = f11_egr_0 & 0x20;
+ int fn11HasPalmDetect = f11_egr_1 & 0x01;
+ int fn11HasRotate = f11_egr_1 & 0x02;
+ int fn11HasRel = fn11Queries[1] & 0x08;
+
+ /* Size of all data including finger status, absolute data for each
finger, relative data and EGR data */
+ unsigned int fn11AllDataBlockSize =
+ /* finger status, four fingers per register */
+ ((fn11FingersSupported + 3) / 4) +
+ /* absolute data, per finger times number of fingers */
+ fn11AbsDataBlockSize * fn11FingersSupported +
+ /* 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. */
+ !!(f11HasPinch | f11HasFlick)) +
+ /* F11_2D_Data11 and F11_2D_Data12 are only present if EGR_FLICK of
egr_0 reports as 1. */
+ 2 * !!(f11HasFlick);
+
+ /* Disable Interrupts. It is up to the Application Driver to
+ * turn them on when it's ready for them. */
+ if(!(retval = rpd->write(rpd, fn01ControlBaseAddr + 1 +
rfi->interruptRegister, 0))) {
+ printk(KERN_ERR "Function $11 Interrupt Disable Fail: %d\n", retval);
+ }
+
+}
+
+/* vim600: set noexpandtab sw=8 ts=8 :*/
diff --git a/drivers/input/touchscreen/rmi_function_11.h
b/drivers/input/touchscreen/rmi_function_11.h
new file mode 100755
index 0000000..19eadbe
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_function_11.h
@@ -0,0 +1,37 @@
+/**
+ * \file
+ * 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.
+ *
+
*#############################################################################
+ */
+
+int FN_11_report(struct rmi_application *app, struct rmi_function_info
*rfi, struct input_dev *input);
+void FN_11_config(struct rmi_application *app, struct rmi_function_info
*rfi);
+void FN_11_init(struct input_dev *input);
+void FN_11_detect(struct rmi_application *app, struct rmi_function_info
*rfi, struct rmi_function_descriptor *fd, unsigned int interruptCount);
+
+/* vim600: set noexpandtab sw=8 ts=8 :*/
diff --git a/drivers/input/touchscreen/rmi_i2c.h
b/drivers/input/touchscreen/rmi_i2c.h
new file mode 100755
index 0000000..20c267b
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_i2c.h
@@ -0,0 +1,52 @@
+/**
+ * \file
+ * 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.
+ *
+
*#############################################################################
+ */
+
+/** 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;
+};
+
+/* vim600: set noexpandtab sw=8 ts=8 :*/
diff --git a/drivers/input/touchscreen/rmi_i2c_gta01.c
b/drivers/input/touchscreen/rmi_i2c_gta01.c
new file mode 100755
index 0000000..c9a34b9
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_i2c_gta01.c
@@ -0,0 +1,117 @@
+/**
+ * \file
+ * 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
+
+static int
+get_attention(void)
+{
+#if ATTENTION_ACTIVE_LOW
+ return gpio_get_value(S3C2410_GPF3)?0:1;
+#else
+ return gpio_get_value(S3C2410_GPF3)?1:0;
+#endif
+}
+
+static struct rmi_i2c_clientdata rmi_test_clientdata[] = {
+ [0] = {
+ .i2c_address = 0x20,
+ .irq = IRQ_EINT3,
+ .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;
+
+ printk(KERN_INFO "GTA01 RMI4 Platform Driver Init.\n");
+
+ gta01_rmi_device = pd = kmalloc(sizeof(*pd), GFP_KERNEL);
+ if(!pd) return -ENOMEM;
+ memset(pd, 0, sizeof(*pd));
+
+ /* Set up the GPIO for interrupts */
+ s3c2410_gpio_cfgpin(S3C2410_GPF3, S3C2410_GPF3_EINT3);
+
+ 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_AUTHOR("Synaptics, Inc.");
+MODULE_DESCRIPTION("GTA01 (OpenMoko Phone) RMI4 over I2C Device
Configuration");
+MODULE_LICENSE("GPL");
+
+module_init(mod_init);
+module_exit(mod_exit);
+
+/* vim600: set noexpandtab sw=8 ts=8 : */
diff --git a/drivers/input/touchscreen/rmi_i2c_gta01.mod.c
b/drivers/input/touchscreen/rmi_i2c_gta01.mod.c
new file mode 100755
index 0000000..e11b023
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_i2c_gta01.mod.c
@@ -0,0 +1,20 @@
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+
+struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+};
+
+static const char __module_depends[]
+__attribute_used__
+__attribute__((section(".modinfo"))) =
+"depends=";
+
diff --git a/drivers/input/touchscreen/rmi_phys_i2c.c
b/drivers/input/touchscreen/rmi_phys_i2c.c
new file mode 100755
index 0000000..caf68c4
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_phys_i2c.c
@@ -0,0 +1,633 @@
+/**
+ * \file
+ * 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"
+
+/** Used to lock access to the page address.
+ * \see rmi_set_page()
+ */
+static DEFINE_MUTEX(page_mutex);
+
+/** This is a count of how many clients are accessing this driver.
+ */
+static int num_clients = 0;
+static struct rmi_i2c_clientdata *clientdata = NULL;
+
+/** This list is used in definition of the I2C bus scanning parameters.
+ * There is nothing on our "normal" i2c list.
+ */
+static unsigned short normal_i2c[] = { I2C_CLIENT_END,
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END,
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END,
+};
+/** This list is used in definition of the I2C bus scanning parameters.
+ * There is nothing on our "force" i2c list.
+ */
+static unsigned short force[] = { I2C_CLIENT_END, I2C_CLIENT_END };
+/** This list is used in definition of the I2C bus scanning parameters.
+ * The only thing on our "forces" list is a single empty list.
+ */
+static unsigned short *forces[] = { force, 0 };
+/** Call to a kernel macro to set up our I2C bus scanning parameters.
+ * This relies on the forces and normal_i2c data structures.
+ */
+I2C_CLIENT_INSMOD_COMMON;
+
+static struct i2c_driver rmi_i2c_driver;
+
+/**
+ * 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.
+ * \pre The page_mutex lock must be held when this function is entered.
+ * \param[in] id TBD
+ * \param[in] page The new page address.
+ * \return 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.
+ * \return 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.
+ * \return zero upon success (with the byte read in valp), non-zero
upon error.
+ * \see rmi_i2c_read()
+ */
+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.
+ * \return 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.
+ * \return 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.
+ *
+ * This is a work in progress. It has yet to be figured out how the
interrupt
+ * should be disabled/enabled for interrupt-driven platforms.
+ */
+static irqreturn_t
+i2c_attn_isr(int irq, void *info)
+{
+ struct instance_data *id = info;
+ if(id->rpd.attention) {
+ id->rpd.attention(&id->rpd, id->instance_no);
+ }
+ return IRQ_HANDLED;
+}
+
+
+/**
+ * This function detects each device on the i2c bus and sets up the
structures
+ * for it.
+ */
+static int
+detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct instance_data *id;
+ int retval;
+ int i;
+
+ pr_debug("rmi_i2c: Detect: %08x, %08x\n", address, kind);
+
+ id = kmalloc(sizeof(*id) * 2, GFP_KERNEL);
+ if(!id) {
+ printk(KERN_ERR "rmi_i2c: Out of memory\n");
+ return -ENOMEM;
+ }
+
+ memset(id, 0, sizeof(*id));
+
+ id->rpd.name = "rmi_i2c";
+ 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 */
+
+ /* "Attach" the i2c client to the i2c adapter */
+ id->i2cclient.addr = address;
+ id->i2cclient.adapter = adapter;
+ id->i2cclient.driver = &rmi_i2c_driver;
+ strlcpy(id->i2cclient.name, "rmi_i2c", I2C_NAME_SIZE);
+ i2c_set_clientdata(&id->i2cclient, id);
+ if ((retval = i2c_attach_client(&id->i2cclient))) {
+ pr_debug("rmi_i2c: detect: Failed to attach client\n");
+ kfree(id);
+ return retval;
+ }
+
+ /* Loop through the client data and locate the one that was found. */
+ for(i = 0; i < num_clients; i++) {
+ if(address == clientdata[i].i2c_address) {
+ id->instance_no = i;
+ id->get_attention = clientdata[i].get_attention;
+ /*
+ * Determine if we need to poll (inefficient) or use
+ * interrupts.
+ */
+ if(clientdata[i].irq) {
+ int irqtype;
+
+ id->irq = clientdata[i].irq;
+ switch(clientdata[i].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: Invalid IRQ flags in "
+ "platform data\n");
+ i2c_detach_client(&id->i2cclient);
+ kfree(id);
+ return -ENXIO;
+ }
+
+ if((retval = request_irq(id->irq, i2c_attn_isr,
+ IRQF_DISABLED | irqtype, "rmi_i2c", id))) {
+ printk(KERN_WARNING "rmi_i2c: Unable to get attn "
+ "irq %d. Reverting to polling.\n",
+ id->irq);
+ goto do_polling;
+ }
+ pr_debug("rmi_i2c: got irq\n");
+ id->rpd.polling_required = 0;
+ } else {
+do_polling:
+ id->rpd.polling_required = 1;
+ printk(KERN_INFO "rmi_i2c: No IRQ info given. "
+ "Polling required.\n");
+ }
+
+ /* We found it, so exit the loop */
+ break;
+ }
+ }
+
+ if((retval = rmi_register_phys_driver(&id->rpd))) {
+ printk(KERN_ERR "rmi_i2c : Failed to Register %s phys driver\n",
id->rpd.name);
+
+ if(id->irq) {
+ free_irq(id->irq, id);
+ }
+ i2c_detach_client(&id->i2cclient);
+ kfree(id);
+ return retval;
+ }
+
+ printk(KERN_INFO "rmi_i2c : Successfully Registered %s phys
driver\n", id->rpd.name);
+
+ rmi_set_page(id, 0x04);
+
+ return 0;
+}
+
+/**
+ * This function tears down the structures for each instance.
+ */
+static int
+detach_client(struct i2c_client *client)
+{
+ struct instance_data *id =
+ container_of(client, struct instance_data, i2cclient);
+ int err;
+
+ /* flush_scheduled_work(); */
+
+ 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 ((err = i2c_detach_client(client))) {
+ pr_debug("i2c_detach_client failed: %d\n", err);
+ return err;
+ }
+
+ if(id->irq) {
+ free_irq(id->irq, id);
+ }
+
+ kfree(id);
+ pr_debug("detach_client successful\n");
+ return 0;
+}
+
+/**
+ * This is a i2c service function which is used to detect i2c devices
on the
+ * bus.
+ */
+static int
+attach_adapter(struct i2c_adapter *adapter)
+{
+ int retval = 0;
+
+ pr_debug("i2c_rmi: Attaching Adapter\n");
+ retval = i2c_probe(adapter, &addr_data, detect);
+ return retval;
+}
+
+/**
+ * This structure tells the i2c subsystem about us.
+ */
+static struct i2c_driver rmi_i2c_driver = {
+ .driver = {
+ .name = "rmi_i2c",
+ },
+ .id = 0xfefe, /* This ID is apparently unused. */
+ .attach_adapter = attach_adapter,
+ .detach_client = detach_client,
+};
+
+/**
+ * The Platform Driver probe function. We just tell the i2c subsystem
about
+ * ourselves in this call.
+ */
+static int
+rmi_i2c_probe(struct platform_device *dev)
+{
+ struct rmi_i2c_data *mid = dev->dev.platform_data;
+ int i;
+
+ pr_debug("Probing i2c RMI device\n");
+
+ if(!mid) {
+ printk(KERN_WARNING "A platform_device for \"rmi_i2c\" must contain "
+ "rmi_i2c_data\n");
+ return -ENXIO;
+ }
+
+ num_clients = mid->num_clients;
+ if(num_clients > ARRAY_SIZE(normal_i2c) - 1) {
+ num_clients = ARRAY_SIZE(normal_i2c) - 1;
+ printk(KERN_WARNING "Too many clients defined for %s. "
+ "Limiting to %d\n", dev->name, num_clients);
+ }
+ clientdata = mid->clientdata;
+
+ for(i = 0; i < ARRAY_SIZE(normal_i2c); i++) {
+ normal_i2c[i] = I2C_CLIENT_END;
+ }
+ for(i = 0; i < num_clients; i++) {
+ normal_i2c[i] = clientdata[i].i2c_address;
+ }
+
+ pr_debug("Calling i2c_add_driver\n");
+ return i2c_add_driver(&rmi_i2c_driver);
+}
+
+/**
+ * Tell the i2c subsystem that we're done.
+ * \param[in] dev TBD
+ * \return Always returns 0.
+ */
+static int
+rmi_i2c_remove(struct platform_device *dev)
+{
+ i2c_del_driver(&rmi_i2c_driver);
+ return 0;
+}
+
+/**
+ * Structure used to tell the Platform Driver subsystem about us.
+ */
+static struct platform_driver rmi_i2c_platform_driver = {
+ .driver = {
+ .name = "rmi-i2c",
+ },
+ .probe = rmi_i2c_probe,
+ .remove = rmi_i2c_remove,
+};
+
+/** Print an informational message to the kernel
+ * log and register ourselves with the Platform Driver Subsystem.
+ * This will be called when the module is inserted.
+ * \return the result of our call to platform_driver_register()
+ */
+static int __init mod_init(void)
+{
+ printk(KERN_INFO "RMI I2C Driver\n");
+ if(RMI_ALLOC_STATS) {
+ printk(KERN_INFO " Allocation Stats Enabled\n");
+ }
+
+ return platform_driver_register(&rmi_i2c_platform_driver);
+}
+
+/** Un-register ourselves from the Platform Driver Subsystem.
+ * This will be called when the module is removed.
+ */
+static void __exit mod_exit(void)
+{
+ platform_driver_unregister(&rmi_i2c_platform_driver);
+}
+
+/** Standard driver module information - the author of the module.
+ */
+MODULE_AUTHOR("Synaptics, Inc.");
+/** Standard driver module information - a summary description of this
module.
+ */
+MODULE_DESCRIPTION("RMI4 Driver I2C Physical Layer");
+/** Standard driver module information - the license under which this
module
+ * is included in the kernel.
+ */
+MODULE_LICENSE("GPL");
+
+/** Specifies to the kernel that the mod_init() function should be
called when
+ * the module is loaded.
+ * \see mod_init()
+ */
+module_init(mod_init);
+/** Specifies to the kernel that the mod_exit() function should be
called when
+ * the module is unloaded.
+ * \see mod_exit()
+ */
+module_exit(mod_exit);
+
+/* vim600: set noexpandtab sw=8 ts=8 :*/
diff --git a/drivers/input/touchscreen/rmi_phys_i2c.mod.c
b/drivers/input/touchscreen/rmi_phys_i2c.mod.c
new file mode 100755
index 0000000..22ed454
--- /dev/null
+++ b/drivers/input/touchscreen/rmi_phys_i2c.mod.c
@@ -0,0 +1,20 @@
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+
+struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+};
+
+static const char __module_depends[]
+__attribute_used__
+__attribute__((section(".modinfo"))) =
+"depends=rmi";
+
--
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