/*
?*?The?code?contained?herein?is?licensed?under?the?GNU?General?Public
?*?License.?You?may?obtain?a?copy?of?the?GNU?General?Public?License
?*?Version?2?or?later?at?the?following?locations:
?*
?*?http://www.opensource.org/licenses/gpl-license.html
?*?http://www.gnu.org/copyleft/gpl.html
?*/


/*
?*?Copyright?2006-2012?Freescale?Semiconductor?Inc.?All?rights?reserved.
?*/

/*
?*?The?code?contained?herein?is?licensed?under?the?GNU?General?Public
?*?License.?You?may?obtain?a?copy?of?the?GNU?General?Public?License
?*?Version?2?or?later?at?the?following?locations:
?*
?*?http://www.opensource.org/licenses/gpl-license.html
?*?http://www.gnu.org/copyleft/gpl.html
?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?
#include?

#include?
#include?
//#include?

#define?DEBUG
#define?DEF_SG_QTY?3
#ifdef?DEBUG
/*?If?you?are?writing?a?driver?please?use?dev_dbg?instead?*/
	#define?dev_printk（fmt?args...）??printk（KERN_DEBUG?fmt?##?args）
#else
	static?/*inline*/?int?__attribute__?（（format?（printf?1?2）））?dev_printk（const?char?*?fmt?...）
	{
		return?0;
	}
#endif

static?int?gMajor;?/*?major?number?of?device?*/
static?struct?class?*dma_tm_class;
u32?*wbuf[DEF_SG_QTY];
u32?*rbuf[DEF_SG_QTY];

struct?dma_chan?*dma_m2m_chan;

struct?completion?dma_m2m_ok;

struct?scatterlist?sg[DEF_SG_QTY]?sg2[DEF_SG_QTY];

#define?SDMA_BUF_SIZE??40960



static?bool?dma_m2m_filter（struct?dma_chan?*chan?void?*param）
{
	if?（!imx_dma_is_general_purpose（chan））
		return?false;
	chan->private?=?param;
	return?true;
}

int?sdma_open（struct?inode?*?inode?struct?file?*?filp）
{
	int?i;
	dma_cap_mask_t?dma_m2m_mask;
	struct?imx_dma_data?m2m_dma_data?=?{0};

	init_completion（&dma_m2m_ok）;

	dma_cap_zero（dma_m2m_mask）;
	dma_cap_set（DMA_SLAVE?dma_m2m_mask）;
	m2m_dma_data.peripheral_type?=?IMX_DMATYPE_MEMORY;
	m2m_dma_data.priority?=?DMA_PRIO_HIGH;

	dma_m2m_chan?=?dma_request_channel（dma_m2m_mask?dma_m2m_filter?&m2m_dma_data）;
	if?（!dma_m2m_chan）?{
		dev_printk（“Error?opening?the?SDMA?memory?to?memory?channel\n“）;
		return?-EINVAL;
	}

	for（i=0;?i		wbuf[i]?=?kzalloc（SDMA_BUF_SIZE?GFP_DMA）;
		if（!wbuf[i]）?{
			dev_printk（“error?wbuf[%d]?!!!!!!!!!!!\n“?i）;
			return?-1;
		}
	}

	dev_printk（“kzalloc?%d?wbuf?succeed\n“?DEF_SG_QTY）;






	for（i=0;?i		rbuf[i]?=?kzalloc（SDMA_BUF_SIZE?GFP_DMA）;
		if（!rbuf[i]）?{
			dev_printk（“error?rbuf[%d]?!!!!!!!!!!!\n“?i）;
			return?-1;
		}
	}
	dev_printk（“kzalloc?%d?rbuf?succeed\n“?DEF_SG_QTY）;
	return?0;
}

int?sdma_release（struct?inode?*?inode?struct?file?*?filp）
{
	int?i;
	dma_release_channel（dma_m2m_cha