client_template.addr = addr;	  int ret;    if ((wm8971_codec.wm8971_2w_client = kmalloc(sizeof(struct i2c_client),GFP_KERNEL)) == NULL)      {        printk("kmalloc error \n");        return -ENOMEM;	  	}    memcpy(wm8971_codec.wm8971_2w_client, &client_template, sizeof(struct i2c_client));    i2c_set_clientdata(wm8971_codec.wm8971_2w_client,(void*)&wm8971_codec);    /*    wm8971_codec.wm8971_2w_client->data = (void*)&wm8971_codec;    */	if (wm8971_reset(wm8971_codec.wm8971_2w_client) != 0) {				kfree (wm8971_codec.wm8971_2w_client);		err("cannot reset the WM8971");				return -EIO;	}   ret=i2c_attach_client(wm8971_codec.wm8971_2w_client);        return ret;}

/* * Detach WM8971 2 wire client  */static int wm8971_detach(struct i2c_client *client){		i2c_detach_client(client);	kfree(client);		return 0;}
static int wm8971_reset(struct i2c_client *client){	return wm8971_2w_write (client, WM8971_RESET, 0);}
/*  * Probe Bulverde I2C adapter for WM8971 */static int wm8971_probe(struct i2c_adapter *adap){			if (adap->id == (I2C_ALGO_PXA)) {		return i2c_probe(adap, &addr_data, wm8971_attach);	}		return 0;}


static u16 wm8971_read_reg_cache(u8 reg){	return wm8971_reg[reg - 1];}

static void wm8971_write_reg_cache(u8 reg, u16 value){	wm8971_reg[reg - 1] = value;}


static int wm8971_2w_write(struct i2c_client *client, u8 reg, u16 value){	u8 data[2];	int i;	//printk("1.this is wm8971_2w_write function\n");	/* data is 	 *   D15..D9 WM971 register offset	 *   D8...D0 register data	 */	data[0] = (reg << 1) | ((value >> 8) & 0x0001);	data[1] = value & 0x00ff;	wm8971_write_reg_cache (reg, value);	//printk("2.this is wm8971_2w_write function\n");	i=i2c_master_send(client, data, 2);	//printk("3.this is wm8971_2w_write function\n");	if (i == 2)		return 0;	else		return -1;}
/* * Set WM8971 ADC and DAC sample rates and * enable SSP port 2 at the correct speed. *  * returns sample rate on success, else error. */static int wm8971_set_adcdac_rate(int val){	int ret = val;	//u16 clock;		//clock = wm8971_read_reg_cache(WM8971_CLOCK) & 0x3f;		switch (val) {		#if 0		case 8000: /* ADC/DAC 8kHz */			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_SRATE, WM8971_A8D8) != 0)				ret = -EIO;			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_CLOCK, WM8971_VD8K | clock) !=0)				ret = -EIO;			if (wm8971_psp_open(WM8971_SSP_8K) != 0)				ret = -EIO;			if (hifi)				wm8971_i2s_open(WM8971_I2S_8K);			break;		case 12000:	 /* ADC/DAC 12kHz */			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_SRATE, WM8971_A12D12) != 0)				ret = -EIO;			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_CLOCK, WM8971_VD12K | clock) !=0)				ret = -EIO;			if (wm8971_psp_open(WM8971_SSP_12K) != 0)				ret = -EIO;			if (hifi)				wm8971_i2s_open(WM8971_I2S_12K);			break;		case 16000:	 /* ADC/DAC 16kHz */			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_SRATE, WM8971_A16D16) != 0)				ret = -EIO;			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_CLOCK, WM8971_VD16K | clock) !=0)				ret = -EIO;			if (wm8971_psp_open(WM8971_SSP_16K) != 0)				ret = -EIO;			if (hifi)				wm8971_i2s_open(WM8971_I2S_16K);			break;		case 24000:	 /* ADC/DAC 24kHz - Voice DAC only*/			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_SRATE, WM8971_A24D24) != 0)				ret = -EIO;			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_CLOCK, WM8971_VD24K | clock) !=0)				ret = -EIO;			if (wm8971_psp_open(WM8971_SSP_24K) != 0)				ret = -EIO;			break;					#endif		case 44100:		  		  if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_SRATE, 0x0020) != 0)				ret = -EIO;						if (wm8971_psp_open(WM8971_SSP_24K) != 0)				ret = -EIO;			break;			//	#if 0			case 48000:	 /* ADC/DAC 48kHz */						if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_SRATE, WM8971_VD48K) != 0)				ret = -EIO;			//			if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_CLOCK, WM8971_VD48K | clock) !=0)//				ret = -EIO;						//if (wm8971_psp_open(WM8971_SSP_44_1K) != 0)			//	ret = -EIO;						//if (hifi)				wm8971_i2s_open(WM8971_I2S_441K);						break;		//	#endif		default:			/* desired rate is not permitted */			ret = -EPERM;			break;	}			//if (ret != -EIO)	//	ssp_enable(&wm8971_codec.ssp);			return  ret;}

static int wm8971_i2s_open(int speed){
	
	GPCR0 |= 0xC0000000;			//0x40E00024
  GPDR0 &= 0x0fffffff;
  GPDR0 |= 1U<<30|1U<<31|1U<<28;
  GAFR0_U = (GAFR0_U & 0x00FFFFFF) | 0x59000000;	
  //GAFR1_L = (GAFR1_L&0xfffffffc)|0x1;	SACR0&=0x0;
	SACR0 |= (0xe<<12)|(0x1<<8)|(0x1<<2);
  SACR1=0;
	SACR1&=~((0x1<<4)|(0x1<<3)|(0x1<<0));
  SAIMR=0;
	SACR1|=0x1<<3;
	SADIV = speed;
  SACR0|=0x1<<0;	//SACR0 |= SACR0_RFTH(14) | SACR0_TFTH(1) | SACR0_BCKD;	//SACR1 &= ~(SACR1_DRPL | SACR1_DREC | SACR1_AMSL);	//SAIMR |= SAIMR_RFS | SAIMR_TFS;	//SADIV = speed;	//SACR0 |= SACR0_ENB;	return 0;}

static void wm8971_i2s_close(){	SACR0 &= ~SACR0_ENB;	CKEN &= ~CKEN8_I2S;}

#ifdef CONFIG_PM/*  * WM8971 Power Management */static int wm8971_pm_event(struct pm_dev *dev, pm_request_t rqst, void *data){	switch(rqst) {		case PM_SUSPEND:			wm8971_suspend();			break;		case PM_RESUME:			wm8971_resume();			break;	}	return 0;}/* * Power down the codec *//* PM NOT TESTED */static void wm8971_suspend(void){	/* powerdown everything, set Vmid to 500kOhm */	if ((wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_PWR1, 0x0100) != 0) &&		(wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_PWR2, 0x0000) != 0))			err("could not powerdown WM8971");}/* * Power up the Codec */static void wm8971_resume(void){	/* powerup everything, set Vmid to 50kOhm */	if (wm8971_power_up())			err("could not powerup WM8971");}#endif#ifdef CONFIG_PROC_FSstatic int wm8971_read_proc (char *page, char **start, off_t off,		    int count, int *eof, void *data){	int len = 0, i;		struct wm8971_codec_t* c;  	if ((c = data) == NULL)		return -ENODEV;		/* driver version */	len = sprintf (page+len, "Wolfson WM8971 Version %s\n", WM8971_VERSION);		/* reg dump */	for (i = 0; i<43; i++) 		len = sprintf (page+len, "0x%2.2x %3x\n", i, wm8971_read_reg_cache(i));		return len;}#endif


/*have not been configed below*/
static int wm8971_power_up(void){		//u16 pwr = 0xf0;				/* set Vmid to 5kOhm, enable VREF  */	if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_PWR1, 0x00f0) != 0)		return -EIO;	  	/* enable LOUT 1, ROUT1.... */	if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_PWR2, 0x0180) != 0)		return -EIO;		/* let WM8971 powerup and then set Vmid to 50kOhm */	mdelay(1);	if (wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_PWR2, 0x01f8) != 0)		return -EIO;			return 0;}

static int wm8971_power_down(){ 	if ((wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_PWR1, 0x0000) != 0) &&		(wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_PWR2, 0x0000) != 0)) {			err("could not powerdown WM8971");			return -EIO;		}			return 0;}

/*  * initiliase the WM8971 */static int wm8971_init(void){	int ret = 0;	CKEN |= CKEN8_I2S;		/* power up the device */	if ((ret = wm8971_power_up()) != 0) {				ret = -EIO;		goto out;	}			/* set up GPIO and alternate functions for SSP2/I2S */	//GAFR0_U=(GAFR0_U&0xFFC03FFF)|0x3FC000;		//set_GPIO_mode(GPIO28_BITCLK_I2S_MD);	//set_GPIO_mode(GPIO29_SDATA_IN_I2S_MD);	//set_GPIO_mode(GPIO30_SDATA_OUT_I2S_MD); // not sure of correct GPIO for SSP2 RX	//set_GPIO_mode(GPIO31_SYNC_I2S_MD);			wm8971_i2s_open(WM8971_I2S_441K);	/* set up default ADC/DAC sample rate *///	if ((ret = wm8971_set_adcdac_rate(WM8971_DEFAULT_SRATE)) != WM8971_DEFAULT_SRATE) {//		err("could not set WM8971 sample rate to %d", WM8971_DEFAULT_SRATE);//		ret = -EIO;//		goto out;//	} ret=0;  	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_LINVOL, 0x0097);		ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_RINVOL, 0x0097);		ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_LOUT1V, 0x0040);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_ROUT1V, 0x0040);		ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_LDAC, 0x0000);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_RDAC, 0x0000);		//ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_LDAC, 0x01fb);	//ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_RDAC, 0x01fb);		ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_LOUT1V, 0x0179);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_ROUT1V, 0x0179);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_ADCDAC, 0x0000);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_AUDIO, 0x0002);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_SRATE, 0x0020);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_LDAC,  0x01e5);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_RDAC,  0x01e5);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_BASS,  0x000f);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_TREBLE,0x000f);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_ALC1,  0x007b);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_ALC2,  0x0000);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_ALC3,  0x0032);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_NGATE, 0x0000);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_LADC,  0x00c3);	ret += wm8971_2w_write(wm8971_codec.wm8971_2w_client, WM8971_RADC,  0x00c3);