/*
 * (C) Copyright 2007-2013
 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
 * Jerry Wang <wangflord@allwinnertech.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include  "usbc_i.h"


/*
***********************************************************************************
*                     USBC_Dma_Set_ChannalPara
*
* Description:
*    查询fifo是否为空
*
* Arguments:
*    hUSB    :  input.  USBC_open_otg获得的句柄, 记录了USBC所需要的一些关键数据
*
*
* Returns:
*
* note:
*    无
*
***********************************************************************************
*/
int USBC_Dma_Set_ChannalPara(__hdle hUSB, __u32 dma_chan, __u32 trans_dir, __u32 ep_type)
{
    __usbc_otg_t *usbc_otg = (__usbc_otg_t *)hUSB;
	uint  reg_val;

	if(usbc_otg == NULL)
	{
		return -1;
	}

	reg_val = readl((const volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_CONFIG + 0x10 * dma_chan));
	reg_val &= ~((1 << 4) | (0xf << 0));
	reg_val |=  ((trans_dir & 1) << 4);
	reg_val |=  ((ep_type & 0xf) << 0);
	writel(reg_val, (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_CONFIG + 0x10 * dma_chan));

	return 0;
}
/*
***********************************************************************************
*                     USBC_Dma_Set_PktLen
*
* Description:
*    查询fifo是否为空
*
* Arguments:
*    hUSB    :  input.  USBC_open_otg获得的句柄, 记录了USBC所需要的一些关键数据
*
*
* Returns:
*
* note:
*    无
*
***********************************************************************************
*/
int USBC_Dma_Set_PktLen(__hdle hUSB, __u32 dma_chan, __u32 pkt_len)
{
    __usbc_otg_t *usbc_otg = (__usbc_otg_t *)hUSB;
    uint  reg_val;

    if(usbc_otg == NULL)
    {
    	return -1;
    }

    reg_val = readl((const volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_CONFIG + 0x10 * dma_chan));
    reg_val &= ~(0x7ff << 16);
    //1650 burst len: datawidth is 32bit = 4byte,so burst len = pkt_len/4 
    //reg_val |=  (((pkt_len/4) & 0x7ff) << 16);

    //1667 burst len :  datawidth is 8bit, so burst len = 1byte
    reg_val |=  (((pkt_len) & 0x7ff) << 16);
    writel(reg_val, (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_CONFIG + 0x10 * dma_chan));

	return 0;
}
/*
***********************************************************************************
*                     USBC_Dma_Start
*
* Description:
*    查询fifo是否为空
*
* Arguments:
*    hUSB    :  input.  USBC_open_otg获得的句柄, 记录了USBC所需要的一些关键数据
*
*
* Returns:
*
* note:
*    无
*
***********************************************************************************
*/
int USBC_Dma_Start(__hdle hUSB, __u32 dma_chan, __u32 addr, __u32 pkt_len)
{
    __usbc_otg_t *usbc_otg = (__usbc_otg_t *)hUSB;
    uint  reg_val;

    if(usbc_otg == NULL)
    {
    	return -1;
    }

    if(pkt_len & 0x03)
    {
    	return -1;
    }

    reg_val  = readl((const volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_ENABLE));
    reg_val |=  (1 << (dma_chan & 0xff));
    writel(reg_val, (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_ENABLE));

    writel(addr,    (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_ADDR + 0x10 * dma_chan));
    //1650 datawidth is 32 bit.so size=len/4
    //writel(pkt_len/4, usbc_otg->base_addr + USBC_REG_o_DMA_SIZE + 0x10 * dma_chan);

    //1667 datawidth is 8bit 
    writel(pkt_len, (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_SIZE + 0x10 * dma_chan));

    reg_val = readl((const volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_CONFIG + 0x10 * dma_chan));
    reg_val |= (1U << 31);

    writel(reg_val, (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_CONFIG + 0x10 * dma_chan));

	return 0;
}
/*
***********************************************************************************
*                     USBC_Dma_Int_Stop
*
* Description:
*    查询fifo是否为空
*
* Arguments:
*    hUSB    :  input.  USBC_open_otg获得的句柄, 记录了USBC所需要的一些关键数据
*
*
* Returns:
*
* note:
*    无
*
***********************************************************************************
*/
int USBC_Dma_Int_Stop(__hdle hUSB, __u32 dma_chan)
{
    __usbc_otg_t *usbc_otg = (__usbc_otg_t *)hUSB;
	uint  reg_val;

	if(usbc_otg == NULL)
	{
		return -1;
	}

	reg_val  = readl((const volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_ENABLE));
	reg_val &= ~(1 << (dma_chan & 0xff));
	writel(reg_val, (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_ENABLE));

	return 0;
}
/*
***********************************************************************************
*                     USBC_Dma_Int_Query
*
* Description:
*    查询fifo是否为空
*
* Arguments:
*    hUSB    :  input.  USBC_open_otg获得的句柄, 记录了USBC所需要的一些关键数据
*
*
* Returns:
*
* note:
*    无
*
***********************************************************************************
*/
int USBC_Dma_Int_Query(__hdle hUSB)
{
    __usbc_otg_t *usbc_otg = (__usbc_otg_t *)hUSB;

	if(usbc_otg == NULL)
	{
		return -1;
	}

	return readl((const volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_STATUS));
}
/*
***********************************************************************************
*                     USBC_Dma_Int_Clear
*
* Description:
*    查询fifo是否为空
*
* Arguments:
*    hUSB    :  input.  USBC_open_otg获得的句柄, 记录了USBC所需要的一些关键数据
*
*
* Returns:
*
* note:
*    无
*
***********************************************************************************
*/
int USBC_Dma_Int_Clear(__hdle hUSB)
{
    __usbc_otg_t *usbc_otg = (__usbc_otg_t *)hUSB;

	if(usbc_otg == NULL)
	{
		return -1;
	}

	writel(0xff, (volatile void __iomem *)(usbc_otg->base_addr + USBC_REG_o_DMA_STATUS));

	return 0;
}
