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/*
* File : drv_dma.c
* This file is part of gkipc BSP for RT-Thread distribution.
*
* Copyright (c) 2017 ChengDu goke Microelectronics Co., Ltd.
* All rights reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Visit http://www.goke.com to get contact with goke.
*
* Change Logs:
* Date Author Notes
*/
/*****************************************************************************
* Include Section
* add all #include here
*****************************************************************************/
#include "drivers/drv_dma.h"
#include "gd_dma.h"
/*****************************************************************************
* Define section
* add all #define here
*****************************************************************************/
//#define GK_DMA_DEBUG
#ifndef GK_DMA_DEBUG
#define DMA_PRINT_DBG(fmt, args...)
#define DMA_PRINT_ERR(fmt, args...) rt_kprintf(fmt, ##args);
#else
#define DMA_PRINT_DBG(fmt, args...) rt_kprintf(fmt, ##args);
#define DMA_PRINT_ERR(fmt, args...) rt_kprintf(fmt, ##args);
#endif
/****************************************************************************
* ADT section
* add definition of user defined Data Type that only be used in this file here
***************************************************************************/
static struct rt_dma_device _dma_device;
/******************************************************************************
* Function prototype section
* add prototypes for all functions called by this file,execepting those
* declared in header file
*****************************************************************************/
/*****************************************************************************
* Global variables section - Exported
* add declaration of global variables that will be exported here
* e.g.
* int8_t foo;
****************************************************************************/
/*****************************************************************************
* static fun;
*****************************************************************************/
static rt_err_t rt_dma_init(struct rt_device *dev);
static rt_err_t rt_dma_open(struct rt_device *dev, rt_uint16_t oflag);
static rt_err_t rt_dma_close(struct rt_device *dev);
static rt_err_t rt_dma_control(struct rt_device *dev, int cmd,void *args);
/*****************************************************************************
* Global variables section - Local
* define global variables(will be refered only in this file) here,
* static keyword should be used to limit scope of local variable to this file
* e.g.
* static uint8_t ufoo;
*****************************************************************************/
/* function body */
/*****************************************************************************
* Description:
* add funtion description here
* Parameters:
* description for each argument, new argument starts at new line
* Return:
* what does this function returned?
*****************************************************************************/
static rt_err_t rt_dma_init(struct rt_device *dev)
{
return (RT_EOK);
}
static rt_err_t rt_dma_open(struct rt_device *dev, rt_uint16_t oflag)
{
rt_uint32_t retVal = 0;
struct rt_dma_device *dma;
RT_ASSERT(dev != RT_NULL);
dma = (struct rt_dma_device *)dev->user_data;
retVal = GD_DMA_Open((GD_DMA_OPEN_PARAM_S *)&dma->openParam,(GD_HANDLE *)&dma->handle);
if(retVal != RT_EOK)
{
DMA_PRINT_ERR("GD_DMA_Open failed!\n");
return (-RT_ERROR);
}
return (RT_EOK);
}
static rt_err_t rt_dma_close(struct rt_device *dev)
{
rt_uint32_t retVal = 0;
struct rt_dma_device *dma;
RT_ASSERT(dev != RT_NULL);
dma = (struct rt_dma_device *)dev->user_data;
GD_DMA_Stop((GD_HANDLE)dma->handle);
retVal = GD_DMA_Close((GD_HANDLE)dma->handle);
if (retVal != RT_EOK)
{
DMA_PRINT_ERR("GD_DMA_Close failed!\n");
return (-RT_ERROR);
}
return (RT_EOK);
}
static rt_err_t rt_dma_control(struct rt_device *dev, int cmd,void *args)
{
rt_uint32_t retVal = 0;
rt_uint32_t des = 0;
RT_DMA_DESCRIPTOR_S *descriptor;
struct rt_dma_device *dma;
RT_ASSERT(dev != RT_NULL);
dma = (struct rt_dma_device *)dev->user_data;
switch(cmd)
{
case DMA_CMD_ADD_DESCRIPTOR:
descriptor = (RT_DMA_DESCRIPTOR_S *)args;
retVal = GD_DMA_AddDescriptor((GD_HANDLE)dma->handle,(GD_DMA_DESCRIPTOR_S *)descriptor);
if (retVal != RT_EOK)
{
DMA_PRINT_ERR("GD_DMA_AddDescriptor failed!\n");
return (-RT_ERROR);
}
break;
case DMA_CMD_START:
des = *(rt_uint32_t*)args;
retVal = GD_DMA_Start((GD_HANDLE)dma->handle,des);
if (retVal != RT_EOK)
{
DMA_PRINT_ERR("GD_DMA_Start failed!\n");
return (-RT_ERROR);
}
break;
case DMA_CMD_STOP:
GD_DMA_Stop((GD_HANDLE)dma->handle);
break;
default:break;
}
return (RT_EOK);
}
/**
* This function register a dma device
*/
static rt_err_t rt_hw_dma_register(const char *name,rt_uint32_t flag)
{
rt_uint32_t ret;
struct rt_device *device;
device = &(_dma_device.parent);
device->type = RT_Device_Class_Miscellaneous;
device->rx_indicate = RT_NULL;
device->tx_complete = RT_NULL;
device->init = rt_dma_init;
device->open = rt_dma_open;
device->close = rt_dma_close;
device->read = RT_NULL;
device->write = RT_NULL;
device->control = rt_dma_control;
device->user_data = (void *)&_dma_device;
/* register a character device */
ret = rt_device_register(device, name, flag);
return ret;
}
void rt_gk_dma_init(void)
{
rt_uint32_t retVal = 0;
retVal = GD_DMA_Init();
if (retVal != RT_EOK)
{
DMA_PRINT_ERR("GD_DMA_Init failed!\n");
return;
}
rt_hw_dma_register("gk_dma",RT_DEVICE_FLAG_RDWR);
}
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