171 lines
5.4 KiB
C
171 lines
5.4 KiB
C
/*
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* This file is part of FH8620 BSP for RT-Thread distribution.
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*
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* Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
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* All rights reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Visit http://www.fullhan.com to get contact with Fullhan.
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*
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* Change Logs:
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* Date Author Notes
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*/
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/*****************************************************************************
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* Include Section
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* add all #include here
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*****************************************************************************/
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#include "drivers/dma.h"
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/*****************************************************************************
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* Define section
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* add all #define here
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*****************************************************************************/
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/****************************************************************************
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* ADT section
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* add definition of user defined Data Type that only be used in this file here
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***************************************************************************/
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/******************************************************************************
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* Function prototype section
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* add prototypes for all functions called by this file,execepting those
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* declared in header file
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*****************************************************************************/
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/*****************************************************************************
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* Global variables section - Exported
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* add declaration of global variables that will be exported here
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* e.g.
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* int8_t foo;
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****************************************************************************/
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/*****************************************************************************
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* static fun;
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*****************************************************************************/
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static rt_err_t rt_dma_init(struct rt_device *dev);
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static rt_err_t rt_dma_open(struct rt_device *dev, rt_uint16_t oflag);
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static rt_err_t rt_dma_close(struct rt_device *dev);
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static rt_err_t rt_dma_control(struct rt_device *dev,
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rt_uint8_t cmd,
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void *args);
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/*****************************************************************************
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* Global variables section - Local
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* define global variables(will be refered only in this file) here,
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* static keyword should be used to limit scope of local variable to this file
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* e.g.
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* static uint8_t ufoo;
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*****************************************************************************/
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/* function body */
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/*****************************************************************************
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* Description:
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* add funtion description here
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* Parameters:
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* description for each argument, new argument starts at new line
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* Return:
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* what does this function returned?
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*****************************************************************************/
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static rt_err_t rt_dma_init(struct rt_device *dev)
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{
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struct rt_dma_device *dma;
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RT_ASSERT(dev != RT_NULL);
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dma = (struct rt_dma_device *)dev;
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if (dma->ops->init)
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{
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return (dma->ops->init(dma));
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}
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return (-RT_ENOSYS);
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}
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static rt_err_t rt_dma_open(struct rt_device *dev, rt_uint16_t oflag)
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{
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return (RT_EOK);
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}
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static rt_err_t rt_dma_close(struct rt_device *dev)
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{
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struct rt_dma_device *dma;
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RT_ASSERT(dev != RT_NULL);
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dma = (struct rt_dma_device *)dev;
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if (dma->ops->control(dma, RT_DEVICE_CTRL_DMA_CLOSE, RT_NULL) != RT_EOK)
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{
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return (-RT_ERROR);
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}
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return (RT_EOK);
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}
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static rt_err_t rt_dma_control(struct rt_device *dev,
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rt_uint8_t cmd,
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void *args)
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{
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struct rt_dma_device *dma;
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RT_ASSERT(dev != RT_NULL);
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dma = (struct rt_dma_device *)dev;
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//args is the private data for the soc!!
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return (dma->ops->control(dma, cmd, args));
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}
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/**
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* This function register a dma device
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*/
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rt_err_t rt_hw_dma_register(struct rt_dma_device *dma,
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const char *name,
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rt_uint32_t flag,
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void *data)
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{
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rt_uint32_t ret;
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struct rt_device *device;
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RT_ASSERT(dma != RT_NULL);
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device = &(dma->parent);
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device->type = RT_Device_Class_Miscellaneous;
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device->rx_indicate = RT_NULL;
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device->tx_complete = RT_NULL;
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device->init = rt_dma_init;
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device->open = rt_dma_open;
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device->close = rt_dma_close;
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device->read = RT_NULL;
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device->write = RT_NULL;
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device->control = rt_dma_control;
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device->user_data = data;
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/* register a character device */
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ret = rt_device_register(device, name, flag);
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rt_kprintf("dma ret is :%x\n",ret);
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return ret;
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}
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