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/*
* Copyright (C) 2017-2024 Alibaba Group Holding Limited
*
* SPDX-License-Identifier: Apache-2.0
*
* 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 <string.h>
#include <soc.h>
#include <drv/mbox.h>
#include <drv/irq.h>
#include <drv/porting.h>
#define CHN_NUM 4
#define INFO_NUM 8
#define MBOX_SEND_MAX_MESSAGE_LENGTH ((INFO_NUM - 1U) * 4U)
/**
\brief wj_box_irq_handler
\param[in] mbox handle of mbox instance
*/
static void wj_mbox_irq_handler(void *arg)
{
CSI_PARAM_CHK_NORETVAL(arg);
///< TODO：获取中断状态
///< TODO：清除中断
///< TODO：根据中断状态处理中断
}
/**
\brief Initialize MAILBOX Interface. 1. Initializes the resources needed for the MAILBOX interface 2.registers event callback function
\param[in] mbox operate handle
\param[in] idx the device idx
\return error code
*/
csi_error_t csi_mbox_init(csi_mbox_t *mbox, uint32_t idx)
{
CSI_PARAM_CHK(mbox, CSI_ERROR);
csi_error_t ret = CSI_OK;
///< 获取中断号、基地址等相关信息
ret = target_get(DEV_WJ_MBOX_TAG, idx, &mbox->dev);
if (ret == CSI_OK) {
for (uint32_t i = 0U; i < CHN_NUM; i++) {
for (uint32_t j = 0U; j < INFO_NUM; j++) {
/// TODO：把CPU0所有通道的MBOX_INFO清零
}
///< TODO：屏蔽CPU0所有通道的中断
}
for (uint32_t i = 0U; i < CHN_NUM; i++) {
///< TODO：不屏蔽CPU0所有通道的中断
///< TODO：清除CPU0所有通道的中断
}
}
return ret;
}
/**
\brief De-initialize MAILBOX Interface. stops operation and releases the software resources used by the interface
\param[in] mbox operate handle
*/
void csi_mbox_uninit(csi_mbox_t *mbox)
{
CSI_PARAM_CHK_NORETVAL(mbox);
for (uint32_t i = 0U; i < CHN_NUM; i++) {
///< TODO：屏蔽CPU0所有通道的读中断
///< TODO：清除CPU0所有通道的中断
}
///< 注销MBOX中断服务函数，禁止中断控制器中对应的中断
csi_irq_detach((uint32_t)mbox->dev.irq_num);
csi_irq_disable((uint32_t)mbox->dev.irq_num);
}
/**
\brief Start sending data to MAILBOX transmitter,(received data is ignored).
This function is non-blocking,\ref mailbox_event_e is signaled when operation completes or error happens.
\ref csi_mailbox_get_status can get operation status.
\param[in] mbox operate handle
\param[in] channel_id index of channel
\param[in] data Pointer to buffer with data to send to MAILBOX transmitter.
\param[in] size size of data items to send
\return sent number of data
*/
int32_t csi_mbox_send(csi_mbox_t *mbox, uint32_t channel_id, const void *data, uint32_t size)
{
CSI_PARAM_CHK(mbox, CSI_ERROR);
CSI_PARAM_CHK(data, CSI_ERROR);
csi_error_t ret = CSI_OK;
int32_t tx_len = (size > MBOX_SEND_MAX_MESSAGE_LENGTH) ? (int32_t)MBOX_SEND_MAX_MESSAGE_LENGTH : (int32_t)size;
///< TODO：获取某个CPU的某个通道
if (ret == CSI_OK) {
uint32_t mbox_busy = 0;
///< TODO：获取指定的CPU以及该CPU的某个通道的繁忙状态到mbox_busy
if (mbox_busy & 0x1U) {
tx_len = 0;
} else {
uint32_t buf[(MBOX_SEND_MAX_MESSAGE_LENGTH + 3U) >> 2U] = {0U};
uint32_t gen_interrupt = 0U;
memcpy(&buf, data, (uint32_t)tx_len);
for (uint32_t count = (uint32_t)(((uint32_t)tx_len + 3U) / 4U); count > 0U; count--) {
///< TODO：往指定的CPU以及该CPU的某个通道写数据（buf[count - 1U]）
gen_interrupt += (uint32_t)((uint32_t)1U << (count - 1U));
}
/* send tx_len to target channel */
///< TODO：往指定的CPU以及该CPU的某个通道写数据（(uint32_t)(((uint32_t)tx_len & 0xfffU) << 4U)）
///< TODO：使能指定的CPU以及该CPU的某个通道的中断
}
} else {
tx_len = -1;
}
return tx_len;
}
/**
\brief Start Receiving data from Mailbox receiver.
\param[in] mbox operate handle.
\param[in] channel_id index of channel
\param[out] data Pointer to buffer with data to receive from mailbox.
\param[in] size Number of data items to receive
\return received number or error code
*/
int32_t csi_mbox_receive(csi_mbox_t *mbox, uint32_t channel_id, void *data, uint32_t size)
{
CSI_PARAM_CHK(mbox, CSI_ERROR);
CSI_PARAM_CHK(data, CSI_ERROR);
int32_t rx_len = (int32_t)size;
uint32_t buf[(MBOX_SEND_MAX_MESSAGE_LENGTH + 3U) >> 2U] = {0U};
///< TODO：获取某个CPU的某个通道
if (channel_id < CHN_NUM) {
for (uint32_t i = 0U; i < ((size + 3U) >> 2U); i++) {
///< TODO：获取数据到buf[i]
///< TODO：往指定的CPU以及该CPU的某个通道写数据（0）
}
///< TODO：禁止指定的CPU以及该CPU的某个通道的中断
memcpy(data, buf, size);
///< TODO：往指定的CPU以及该CPU的某个通道写数据（(MBOX_ACK << 16U) | 1U）
///< TODO：使能指定的CPU以及该CPU的某个通道的中断
} else {
rx_len = -1;
}
return rx_len;
}
/**
\brief Attach callback to the mbox
\param[in] mbox operate handle.
\param[in] cb event callback function \ref csi_mbox_callback_t
\param[in] arg user private param for event callback
\return error code
*/
csi_error_t csi_mbox_attach_callback(csi_mbox_t *mbox, void *callback, void *arg)
{
CSI_PARAM_CHK(mbox, CSI_ERROR);
CSI_PARAM_CHK(callback, CSI_ERROR);
csi_error_t ret = CSI_OK;
mbox->callback = callback;
mbox->arg = arg;
///< TODO：注册MBOX中断服务函数，使能中断控制器对应的中断
csi_irq_attach((uint32_t)mbox->dev.irq_num, &wj_mbox_irq_handler, &mbox->dev);
csi_irq_enable((uint32_t)mbox->dev.irq_num);
return ret;
}
/**
\brief detach callback from the mbox
\param[in] mbox operate handle.
*/
void csi_mbox_detach_callback(csi_mbox_t *mbox)
{
CSI_PARAM_CHK_NORETVAL(mbox);
mbox->callback = NULL;
mbox->arg = NULL;
///< TODO：注销MBOX的中断服务函数，禁止中断控制器对应的中断
csi_irq_detach((uint32_t)mbox->dev.irq_num);
csi_irq_disable((uint32_t)mbox->dev.irq_num);
}
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