diff options
| -rw-r--r-- | include/hardware/mcu.h | 82 | ||||
| -rw-r--r-- | modules/Android.mk | 3 | ||||
| -rw-r--r-- | modules/mcu/Android.mk | 25 | ||||
| -rw-r--r-- | modules/mcu/mcu.c | 57 |
4 files changed, 166 insertions, 1 deletions
diff --git a/include/hardware/mcu.h b/include/hardware/mcu.h new file mode 100644 index 0000000..6fe2cfe --- /dev/null +++ b/include/hardware/mcu.h @@ -0,0 +1,82 @@ +/* + * 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. + */ + +#ifndef ANDROID_INCLUDE_HARDWARE_MCU_H +#define ANDROID_INCLUDE_HARDWARE_MCU_H + +#include <stdint.h> +#include <sys/cdefs.h> +#include <sys/types.h> + +#include <hardware/hardware.h> + +__BEGIN_DECLS + +#define MCU_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1) + +/* + * The id of this module + */ +#define MCU_HARDWARE_MODULE_ID "mcu" + +/* + * MCU message keys passed to (*sendMessage) + */ +#define MCU_PARAMETER_MSG_ENABLE_MCU "enable_mcu" + +/* + * MCU message values passed to (*sendMessage) + */ +#define MCU_PARAMETER_ARG_ON "on" +#define MCU_PARAMETER_ARG_OFF "off" + +/* + * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM + * and the fields of this data structure must begin with hw_module_t + * followed by module specific information. + */ +typedef struct mcu_module { + struct hw_module_t common; + + /* + * (*init)() performs MCU module setup actions at runtime startup, such + * as to initialize an external MCU. This is called only by the MCU HAL + * instance loaded by PowerManagerService. + * + * Returns 0 on success or -errno on error. + */ + int (*init)(struct mcu_module *module); + + /* + * (*sendMessage)() passes a message/argument pair to the MCU to execute + * a function. msg is NULL-terminated. If arg is text, then arg_len must + * reflect the string length. result is a heap-allocated buffer that the + * caller must free. If there is no result, then *result will be NULL and + * *result_len will be 0. + * + * Returns 0 on success or -errno in case of error (for example, if the + * MCU does not support the specified message.) + * + */ + int (*sendMessage)(struct mcu_module *module, const char *msg, + const void *arg, size_t arg_len, void **result, + size_t *result_len); + +} mcu_module_t; + +__END_DECLS + +#endif // ANDROID_INCLUDE_HARDWARE_MCU_H diff --git a/modules/Android.mk b/modules/Android.mk index 07fa5ee..f1a6c1c 100644 --- a/modules/Android.mk +++ b/modules/Android.mk @@ -1,3 +1,4 @@ hardware_modules := gralloc hwcomposer audio nfc nfc-nci local_time \ - power usbaudio audio_remote_submix camera consumerir sensors vibrator + power usbaudio audio_remote_submix camera consumerir sensors vibrator \ + mcu include $(call all-named-subdir-makefiles,$(hardware_modules)) diff --git a/modules/mcu/Android.mk b/modules/mcu/Android.mk new file mode 100644 index 0000000..ec40e3a --- /dev/null +++ b/modules/mcu/Android.mk @@ -0,0 +1,25 @@ +# Copyright (C) 2014 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. + +LOCAL_PATH := $(call my-dir) + +include $(CLEAR_VARS) + +LOCAL_MODULE := mcu.default +LOCAL_MODULE_RELATIVE_PATH := hw +LOCAL_SRC_FILES := mcu.c +LOCAL_SHARED_LIBRARIES := liblog +LOCAL_MODULE_TAGS := optional + +include $(BUILD_SHARED_LIBRARY) diff --git a/modules/mcu/mcu.c b/modules/mcu/mcu.c new file mode 100644 index 0000000..47300f9 --- /dev/null +++ b/modules/mcu/mcu.c @@ -0,0 +1,57 @@ +/* + * 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. + */ +#include <errno.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#define LOG_TAG "Legacy MCU HAL" +#include <utils/Log.h> + +#include <hardware/hardware.h> +#include <hardware/mcu.h> + +static int mcu_init(struct mcu_module *module) +{ + return 0; +} + +static int mcu_send_message(struct mcu_module *module, const char *msg, + const void *arg, size_t arg_len, void **result, + size_t *result_len) +{ + return 0; +} + +static struct hw_module_methods_t mcu_module_methods = { + .open = NULL, +}; + +struct mcu_module HAL_MODULE_INFO_SYM = { + .common = { + .tag = HARDWARE_MODULE_TAG, + .module_api_version = MCU_MODULE_API_VERSION_0_1, + .hal_api_version = HARDWARE_HAL_API_VERSION, + .id = MCU_HARDWARE_MODULE_ID, + .name = "Default MCU HAL", + .author = "The Android Open Source Project", + .methods = &mcu_module_methods, + }, + + .init = mcu_init, + .sendMessage = mcu_send_message, +}; |