mako: notify touch driver when charger is connected

Notify the touch driver to enable noise mitigation
when charger is connected

Change-Id: I3bb910cecc1c411f1067aa94852f816ef7036571

charger_touch/Android.mk

+#
+# Copyright 2012 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+ifneq ($(filter mako occam,$(TARGET_DEVICE)),)
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := charger_touch.c
+LOCAL_SHARED_LIBRARIES := libcutils libhardware_legacy
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_PATH := $(TARGET_OUT)/bin
+LOCAL_MODULE := charger_touch
+LOCAL_MODULE_OWNER := lge
+include $(BUILD_EXECUTABLE)
+
+endif

charger_touch/NOTICE

+
+   Copyright (c) 2005-2012, The Android Open Source Project
+
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+   you may not use this file except in compliance with the License.
+
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+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
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+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      to the Licensor or its representatives, including but not limited to
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          of the NOTICE file are for informational purposes only and
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+          that such additional attribution notices cannot be construed
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
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+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+

charger_touch/charger_touch.c

+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "CHARGER_TOUCH"
+#include <hardware_legacy/uevent.h>
+#include <utils/Log.h>
+#include <fcntl.h>
+
+#define POWER_SUPPLY_PATH "/sys/class/power_supply"
+#define TOUCH_PATH "/sys/devices/virtual/input/lge_touch/charger"
+
+const char* WIRELESS = "change@/devices/platform/bq51051b_wlc/power_supply/wireless";
+const char* USB = "change@/devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/usb";
+
+enum {
+    NO_CHARGER,
+    CHARGER_WIRELESS,
+    CHARGER_USB,
+    CHARGER_AC
+};
+
+static void read_path(const char* path, char* buf, size_t size)
+{
+    int fd = open(path, O_RDONLY, 0);
+    int count;
+
+    if (fd < 0) {
+        ALOGE("Could not open %s", path);
+        return;
+    }
+    count = read(fd, buf, size);
+
+    close(fd);
+}
+
+static void write_path(int type)
+{
+    int fd = open(TOUCH_PATH, O_RDWR, 0);
+    char buf[2];
+
+    if (fd < 0) {
+        ALOGE("Could not open %s", TOUCH_PATH);
+        return;
+    }
+
+    snprintf(buf, sizeof(buf), "%d", type);
+    write(fd, buf, 1);
+
+    close(fd);
+}
+
+static void handle_uevent(const char* udata)
+{
+    const char *str = udata;
+    char path[PATH_MAX];
+    char wlc[2], usb[2], ac[2];
+    int type = NO_CHARGER;
+
+    memset(wlc, 0, 2);
+    memset(usb, 0, 2);
+    memset(ac, 0, 2);
+
+    if (!strncmp(str, WIRELESS, strlen(WIRELESS))) {
+        snprintf(path, sizeof(path), "%s/wireless/online", POWER_SUPPLY_PATH);
+        read_path(path, wlc, 1);
+        if (!strncmp(wlc, "1", 1))
+            type = CHARGER_WIRELESS;
+
+        ALOGE("Type: %d", type);
+        write_path(type);
+    } else if (!strncmp(str, USB, strlen(USB))) {
+        snprintf(path, sizeof(path), "%s/usb/online", POWER_SUPPLY_PATH);
+        read_path(path, usb, 1);
+
+        snprintf(path, sizeof(path), "%s/pm8921-dc/online", POWER_SUPPLY_PATH);
+        read_path(path, ac, 1);
+
+        if (!strncmp(usb, "1", 1)) {
+            type = CHARGER_USB;
+        } else if (!strncmp(ac, "1", 1)) {
+            type = CHARGER_AC;
+        }
+
+        ALOGE("Type: %d", type);
+        write_path(type);
+    }
+
+}
+
+static void event_loop(void)
+{
+    int len = 0;
+    static char udata[4096];
+    memset(udata, 0, sizeof(udata));
+
+    uevent_init();
+
+    while (1) {
+        len = uevent_next_event(udata, sizeof(udata) - 2);
+        handle_uevent(udata);
+    }
+}
+
+int main()
+{
+    event_loop();
+    return 0;
+}

device.mk

@@ -210,7 +210,8 @@ PRODUCT_PACKAGES += \
 PRODUCT_PACKAGES += \
 	bdAddrLoader \
 	libwfcu \
-	conn_init
+	conn_init \
+	charger_touch
 
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += \
 	rild.libpath=/system/lib/libril-qc-qmi-1.so

init.mako.rc

@@ -266,6 +266,7 @@ on post-fs-data
     chown system /sys/module/pm_8x60/modes/cpu2/standalone_power_collapse/idle_enabled
     chown system /sys/module/pm_8x60/modes/cpu3/standalone_power_collapse/idle_enabled
     chown system /sys/module/pm_8x60/modes/cpu0/power_collapse/idle_enabled
+    chown system /sys/devices/virtual/input/lge_touch/charger
 
 on charger
     # Enable Power modes and set the CPU Freq Sampling rates
@@ -301,7 +302,7 @@ on charger
 
 on property:init.svc.wpa_supplicant=stopped
     stop dhcpcd
-    
+
 service rmt_storage /system/bin/rmt_storage
     class main
     user root
@@ -458,3 +459,8 @@ service qseecomd /system/bin/qseecomd
     class late_start
     user system
     group system
+
+service charger_touch /system/bin/charger_touch
+    class main
+    user system
+    group system