touchscreen: add touchscreen hal library

- touchscreen device can be changed and thus
  touchscreen hal is required to manage it.

Change-Id: Ic62d57001a846a6aa0d6bb4f3300afc00755a809
Signed-off-by: Taeyoung Kim <ty317.kim@samsung.com>

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2495541..cd7816c 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,3 +5,4 @@ SET(PREFIX ${CMAKE_INSTALL_PREFIX})
 
 ADD_SUBDIRECTORY(hw/display)
 ADD_SUBDIRECTORY(hw/led)
+ADD_SUBDIRECTORY(hw/touchscreen)

diff --git a/hw/touchscreen/CMakeLists.txt b/hw/touchscreen/CMakeLists.txt
new file mode 100644 (file)
index 0000000..b097615
--- /dev/null
+++ b/hw/touchscreen/CMakeLists.txt
@@ -0,0 +1,19 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+PROJECT(touchscreen C)
+
+SET(PREFIX ${CMAKE_INSTALL_PREFIX})
+
+INCLUDE(FindPkgConfig)
+pkg_check_modules(touchscreen_pkgs REQUIRED hwcommon dlog)
+
+FOREACH(flag ${touchscreen_pkgs_CFLAGS})
+       SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} ${flag}")
+ENDFOREACH(flag)
+
+SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} -fvisibility=hidden")
+SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_CFLAGS}")
+
+ADD_LIBRARY(${PROJECT_NAME} MODULE touchscreen.c ../shared.c)
+TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${touchscreen_pkgs_LDFLAGS})
+SET_TARGET_PROPERTIES(${PROJECT_NAME} PROPERTIES PREFIX "")
+INSTALL(TARGETS ${PROJECT_NAME} DESTINATION ${LIB_INSTALL_DIR}/hw COMPONENT RuntimeLibraries)

diff --git a/hw/touchscreen/touchscreen.c b/hw/touchscreen/touchscreen.c
new file mode 100644 (file)
index 0000000..b25ada5
--- /dev/null
+++ b/hw/touchscreen/touchscreen.c
@@ -0,0 +1,178 @@
+/*
+ * device-node
+ *
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ *
+ * 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.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <linux/limits.h>
+#include <dirent.h>
+
+#include <hw/touchscreen.h>
+#include "../shared.h"
+
+#define INPUT_PATH      "/sys/class/input/"
+#define KEY_CAPABILITIES_PATH  "/device/capabilities/key"
+#define ENABLED_PATH           "/device/enabled"
+#define TOUCHSCREEN_CAPABILITY 400
+
+#define TURNON_TOUCHSCREEN     1
+#define TURNOFF_TOUCHSCREEN    0
+
+static char *touchscreen_node;
+
+static int touchscreen_probe(void)
+{
+       DIR *d;
+       struct dirent entry;
+       struct dirent *dir;
+       char buf[PATH_MAX];
+       int val, ret = -ENOTSUP;
+
+       d = opendir(INPUT_PATH);
+       if (!d)
+               return NULL;
+
+       while (readdir_r(d, &entry, &dir) == 0 && dir != NULL) {
+               if (dir->d_name[0] == '.')
+                       continue;
+               snprintf(buf, sizeof(buf), "%s%s%s", INPUT_PATH,
+                               dir->d_name, KEY_CAPABILITIES_PATH);
+
+               ret = sys_get_int(buf, &val);
+               if (ret < 0 || val != TOUCHSCREEN_CAPABILITY)
+                       continue;
+
+               snprintf(buf, sizeof(buf), "%s%s%s", INPUT_PATH,
+                               dir->d_name, ENABLED_PATH);
+
+               touchscreen_node = strndup(buf, strlen(buf));
+               if (touchscreen_node) {
+                       _I("touchscreen node (%s)", touchscreen_node);
+                       ret = 0;
+               } else {
+                       _E("strndup() failed");
+                       ret = -ENOMEM;
+               }
+               break;
+       }
+       closedir(d);
+
+       return ret;
+}
+
+static int touchscreen_get_state(enum touchscreen_state *state)
+{
+       int ret, val;
+
+       if (!touchscreen_node || !(*touchscreen_node))
+               return -ENOENT;
+
+       if (!state)
+               return -EINVAL;
+
+       ret = sys_get_int(touchscreen_node, &val);
+       if (ret < 0) {
+               _E("Failed to get touchscreen state (%d)", ret);
+               return ret;
+       }
+
+       switch (val) {
+       case TURNOFF_TOUCHSCREEN:
+               *state = TOUCHSCREEN_OFF;
+               break;
+       case TURNON_TOUCHSCREEN:
+               *state = TOUCHSCREEN_ON;
+               break;
+       default:
+               _E("Failed to get touchscreen state (%d)", val);
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static int touchscreen_set_state(enum touchscreen_state state)
+{
+       int ret, val;
+
+       if (!touchscreen_node || !(*touchscreen_node))
+               return -ENOENT;
+
+       switch (state) {
+       case TOUCHSCREEN_OFF:
+               val = TURNOFF_TOUCHSCREEN;
+               break;
+       case TOUCHSCREEN_ON:
+               val = TURNON_TOUCHSCREEN;
+               break;
+       default:
+               _E("Invalid input (%d)", state);
+               return -EINVAL;
+       }
+
+       ret = sys_set_int(touchscreen_node, val);
+       if (ret < 0)
+               _E("Failed to change touchscreen state (%d)", ret);
+
+       return ret;
+}
+
+static int touchscreen_open(struct hw_info *info,
+               const char *id, struct hw_common **common)
+{
+       struct touchscreen_device *touchscreen_dev;
+
+       if (!info || !common)
+               return -EINVAL;
+
+       if (touchscreen_probe() < 0)
+               return -ENOTSUP;
+
+       touchscreen_dev = calloc(1, sizeof(struct touchscreen_device));
+       if (!touchscreen_dev)
+               return -ENOMEM;
+
+       touchscreen_dev->common.info = info;
+       touchscreen_dev->get_state = touchscreen_get_state;
+       touchscreen_dev->set_state = touchscreen_set_state;
+
+       *common = (struct hw_common *)touchscreen_dev;
+       return 0;
+}
+
+static int touchscreen_close(struct hw_common *common)
+{
+       if (!common)
+               return -EINVAL;
+
+       free(common);
+       free(touchscreen_node);
+       return 0;
+}
+
+HARDWARE_MODULE_STRUCTURE = {
+       .magic = HARDWARE_INFO_TAG,
+       .hal_version = HARDWARE_INFO_VERSION,
+       .device_version = TOUCHSCREEN_HARDWARE_DEVICE_VERSION,
+       .id = TOUCHSCREEN_HARDWARE_DEVICE_ID,
+       .name = "touchscreen",
+       .open = touchscreen_open,
+       .close = touchscreen_close,
+};