Initial consumer IR HAL commit

* Initially written by crpalmer
* Changes and improvements made by:
 - zwliew: Cleaned up styling
 - javelinanddart: Added configs
   to make hal more universal

Change-Id: I98eefdde67ad7ed930532a82533a5c91f20abd83
Signed-off-by: Paul Keith <javelinanddart@gmail.com>

Android.mk

@@ -37,6 +37,7 @@ endif
 
 ifeq ($(BOARD_VENDOR),samsung)
 include $(SAM_ROOT)/AdvancedDisplay/Android.mk
+include $(SAM_ROOT)/consumerir/Android.mk
 include $(SAM_ROOT)/liblights/Android.mk
 include $(SAM_ROOT)/modemloader/Android.mk
 include $(SAM_ROOT)/power/Android.mk

consumerir/Android.mk

@@ -0,0 +1,40 @@
+# Copyright (C) 2016 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.
+
+# HAL module implementation stored in
+# hw/<POWERS_HARDWARE_MODULE_ID>.<ro.hardware>.so
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+ifeq ($(IR_HAL_SUFFIX),)
+IR_HAL_SUFFIX := $(TARGET_BOARD_PLATFORM)
+endif
+
+LOCAL_MODULE := consumerir.$(IR_HAL_SUFFIX)
+LOCAL_MODULE_RELATIVE_PATH := hw
+LOCAL_SRC_FILES := consumerir.c
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+LOCAL_MODULE_TAGS := optional
+
+ifeq ($(BOARD_IR_HAS_ONE_FREQ_RANGE),true)
+LOCAL_CFLAGS += -DUSE_ONE_FREQ_RANGE
+endif
+
+ifeq ($(BOARD_USES_MS_IR_SIGNAL),true)
+LOCAL_CFLAGS += -DMS_IR_SIGNAL
+endif
+
+include $(BUILD_SHARED_LIBRARY)

consumerir/consumerir.c

@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2016 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 "ConsumerIrHal"
+
+#include <cutils/log.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <hardware/hardware.h>
+#include <hardware/consumerir.h>
+#include <malloc.h>
+#include <pthread.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+#define UNUSED __attribute__((unused))
+
+#define IR_PATH "/sys/class/sec/sec_ir/ir_send"
+
+static int fd = 0;
+static pthread_mutex_t g_mtx;
+
+static const consumerir_freq_range_t consumerir_freqs[] = {
+#ifdef USE_ONE_FREQ_RANGE
+    {.min = 16000, .max = 60000},
+#else
+    {.min = 30000, .max = 30000},
+    {.min = 33000, .max = 33000},
+    {.min = 36000, .max = 36000},
+    {.min = 38000, .max = 38000},
+    {.min = 40000, .max = 40000},
+    {.min = 56000, .max = 56000},
+#endif
+};
+
+static bool try_append_number(char *buffer, int *len, int size, int number)
+{
+    int stored;
+
+    stored = snprintf(&buffer[*len], size - *len, "%d,", number);
+
+    if (stored < 0 || stored >= (size - *len))
+        return false;
+
+    *len += stored;
+    return true;
+}
+
+static bool grow_buffer(char **buffer, int *size)
+{
+    char *new_buffer;
+
+    *size *= 2;
+    new_buffer = realloc(*buffer, *size);
+    if (new_buffer == NULL)
+        return false;
+
+    *buffer = new_buffer;
+    return true;
+}
+
+static bool append_number(char **buffer, int *len, int *size, int number)
+{
+    if (try_append_number(*buffer, len, *size, number))
+        return true;
+
+    if (!grow_buffer(buffer, size))
+        return false;
+
+    return try_append_number(*buffer, len, *size, number);
+}
+
+static int consumerir_transmit(UNUSED struct consumerir_device *dev,
+   int carrier_freq, const int pattern[], int pattern_len)
+{
+    int buffer_len = 0;
+    int buffer_size = 128;
+    int i;
+    float factor;
+    char *buffer;
+
+    pthread_mutex_lock(&g_mtx);
+
+    buffer = malloc(buffer_size);
+    if (buffer == NULL)
+        return -ENOMEM;
+
+    // Write the header
+    if (!append_number(&buffer, &buffer_len, &buffer_size, carrier_freq))
+        goto error;
+
+#ifndef MS_IR_SIGNAL
+    // Calculate factor of conversion from microseconds to pulses
+    factor = 1000000 / carrier_freq;
+#else
+    factor = 1;
+#endif
+
+    // Write out the timing pattern
+    for (i = 0; i < pattern_len; i++) {
+        if (!append_number(&buffer, &buffer_len, &buffer_size,
+                (int) (pattern[i] / factor)))
+            goto error;
+    }
+
+    buffer[buffer_len - 1] = 0;
+    write(fd, buffer, buffer_len - 1);
+
+    free(buffer);
+
+    pthread_mutex_unlock(&g_mtx);
+
+    return 0;
+
+error:
+    free(buffer);
+    return -ENOMEM;
+}
+
+static int consumerir_get_carrier_freqs(struct consumerir_device *dev,
+    size_t len, consumerir_freq_range_t *ranges)
+{
+    size_t to_copy = consumerir_get_num_carrier_freqs(dev);
+
+    to_copy = len < to_copy ? len : to_copy;
+    memcpy(ranges, consumerir_freqs, to_copy * sizeof(consumerir_freq_range_t));
+    return to_copy;
+}
+
+static int consumerir_close(hw_device_t *dev)
+{
+    free(dev);
+    close(fd);
+    pthread_mutex_destroy(&g_mtx);
+    return 0;
+}
+
+static int consumerir_get_num_carrier_freqs(UNUSED struct consumerir_device *dev)
+{
+    return ARRAY_SIZE(consumerir_freqs);
+}
+
+/*
+ * Generic device handling
+ */
+static int consumerir_open(const hw_module_t *module, const char *name,
+        hw_device_t **device)
+{
+    if (strcmp(name, CONSUMERIR_TRANSMITTER) != 0)
+        return -EINVAL;
+
+    if (device == NULL) {
+        ALOGE("NULL device on open");
+        return -EINVAL;
+    }
+
+    consumerir_device_t *dev = malloc(sizeof(consumerir_device_t));
+    memset(dev, 0, sizeof(consumerir_device_t));
+
+    dev->common.tag            = HARDWARE_DEVICE_TAG;
+    dev->common.tag            = HARDWARE_DEVICE_TAG;
+    dev->common.version        = 0;
+    dev->common.module         = (struct hw_module_t*) module;
+    dev->common.close          = consumerir_close;
+
+    dev->transmit              = consumerir_transmit;
+    dev->get_carrier_freqs     = consumerir_get_carrier_freqs;
+    dev->get_num_carrier_freqs = consumerir_get_num_carrier_freqs;
+
+    pthread_mutex_init(&g_mtx, NULL);
+
+    *device = (hw_device_t*) dev;
+    fd = open(IR_PATH, O_RDWR);
+    return fd;
+}
+
+static struct hw_module_methods_t consumerir_module_methods = {
+    .open = consumerir_open,
+};
+
+consumerir_module_t HAL_MODULE_INFO_SYM = {
+    .common = {
+        .tag                = HARDWARE_MODULE_TAG,
+        .module_api_version = CONSUMERIR_MODULE_API_VERSION_1_0,
+        .hal_api_version    = HARDWARE_HAL_API_VERSION,
+        .id                 = CONSUMERIR_HARDWARE_MODULE_ID,
+        .name               = "Consumer IR Module",
+        .author             = "The CyanogenMod Project",
+        .methods            = &consumerir_module_methods,
+    },
+};