From 50f601cca8985615f9e3de4c34887448ade8a64b Mon Sep 17 00:00:00 2001
From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Date: Sun, 29 Mar 2009 23:01:40 +0200
Subject: s3c44b0: move i2c driver to drivers/i2c

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 cpu/s3c44b0/cpu.c | 291 ------------------------------------------------------
 1 file changed, 291 deletions(-)

(limited to 'cpu/s3c44b0')

diff --git a/cpu/s3c44b0/cpu.c b/cpu/s3c44b0/cpu.c
index 2960f2f3a..0c4469137 100644
--- a/cpu/s3c44b0/cpu.c
+++ b/cpu/s3c44b0/cpu.c
@@ -220,294 +220,3 @@ void rtc_reset (void)
 	BCDSEC = 0;
 	RTCCON &= 1;
 }
-
-
-/*
-	I2C stuff
-*/
-
-/*
- * Initialization, must be called once on start up, may be called
- * repeatedly to change the speed and slave addresses.
- */
-void i2c_init(int speed, int slaveaddr)
-{
-	/*
-		setting up I2C support
-	*/
-	unsigned int save_F,save_PF,rIICCON,rPCONA,rPDATA,rPCONF,rPUPF;
-
-	save_F = PCONF;
-	save_PF = PUPF;
-
-	rPCONF = ((save_F & ~(0xF))| 0xa);
-	rPUPF = (save_PF | 0x3);
-	PCONF = rPCONF; /*PF0:IICSCL, PF1:IICSDA*/
-	PUPF = rPUPF; /* Disable pull-up */
-
-	/* Configuring pin for WC pin of EEprom */
-	rPCONA = PCONA;
-	rPCONA &= ~(1<<9);
-	PCONA = rPCONA;
-
-	rPDATA = PDATA;
-	rPDATA &= ~(1<<9);
-	PDATA = rPDATA;
-
-	/*
-		Enable ACK, IICCLK=MCLK/16, enable interrupt
-		75MHz/16/(12+1) = 390625 Hz
-	*/
-	rIICCON=(1<<7)|(0<<6)|(1<<5)|(0xC);
-	IICCON = rIICCON;
-
-	IICADD = slaveaddr;
-}
-
-/*
- * Probe the given I2C chip address.  Returns 0 if a chip responded,
- * not 0 on failure.
- */
-int i2c_probe(uchar chip)
-{
-	/*
-		not implemented
-	*/
-
-	printf("i2c_probe chip %d\n", (int) chip);
-	return -1;
-}
-
-/*
- * Read/Write interface:
- *   chip:    I2C chip address, range 0..127
- *   addr:    Memory (register) address within the chip
- *   alen:    Number of bytes to use for addr (typically 1, 2 for larger
- *              memories, 0 for register type devices with only one
- *              register)
- *   buffer:  Where to read/write the data
- *   len:     How many bytes to read/write
- *
- *   Returns: 0 on success, not 0 on failure
- */
-
-#define S3C44B0X_rIIC_INTPEND               (1<<4)
-#define S3C44B0X_rIIC_LAST_RECEIV_BIT       (1<<0)
-#define S3C44B0X_rIIC_INTERRUPT_ENABLE      (1<<5)
-#define S3C44B0_IIC_TIMEOUT 100
-
-int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
-
-	int k, j, temp;
-	u32 rIICSTAT;
-
-	/*
-		send the device offset
-	*/
-
-	rIICSTAT = 0xD0;
-	IICSTAT = rIICSTAT;
-
-	IICDS = chip;	/* this is a write operation... */
-
-	rIICSTAT |= (1<<5);
-	IICSTAT = rIICSTAT;
-
-	for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-		temp = IICCON;
-		if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-		break;
-		udelay(2000);
-	}
-	if (k==S3C44B0_IIC_TIMEOUT)
-		return -1;
-
-	/* wait and check ACK */
-	temp = IICSTAT;
-	if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
-		return -1;
-
-	IICDS = addr;
-	IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
-	/* wait and check ACK */
-	for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-		temp = IICCON;
-		if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-		break;
-		udelay(2000);
-	}
-	if (k==S3C44B0_IIC_TIMEOUT)
-		return -1;
-
-	temp = IICSTAT;
-	if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
-		return -1;
-
-	/*
-		now we can start with the read operation...
-	*/
-
-	IICDS = chip | 0x01;	/* this is a read operation... */
-
-	rIICSTAT = 0x90; /*master recv*/
-	rIICSTAT |= (1<<5);
-	IICSTAT = rIICSTAT;
-
-	IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
-	/* wait and check ACK */
-	for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-		temp = IICCON;
-		if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-		break;
-		udelay(2000);
-	}
-	if (k==S3C44B0_IIC_TIMEOUT)
-		return -1;
-
-	temp = IICSTAT;
-	if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
-		return -1;
-
-	for (j=0; j<len-1; j++) {
-
-	/*clear pending bit to resume */
-
-	temp = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-	IICCON = temp;
-
-	/* wait and check ACK */
-	for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-		temp = IICCON;
-		if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-		break;
-		udelay(2000);
-	}
-	if (k==S3C44B0_IIC_TIMEOUT)
-		return -1;
-
-
-		buffer[j] = IICDS; /*save readed data*/
-
-    } /*end for(j)*/
-
-	/*
-		reading the last data
-		unset ACK generation
-	*/
-	temp = IICCON & ~(S3C44B0X_rIIC_INTPEND | (1<<7));
-	IICCON = temp;
-
-	/* wait but NOT check ACK */
-	for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-		temp = IICCON;
-		if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-		break;
-		udelay(2000);
-	}
-	if (k==S3C44B0_IIC_TIMEOUT)
-		return -1;
-
-	buffer[j] = IICDS; /*save readed data*/
-
-	rIICSTAT = 0x90; /*master recv*/
-
-	/* Write operation Terminate sending STOP */
-	IICSTAT = rIICSTAT;
-	/*Clear Int Pending Bit to RESUME*/
-	temp = IICCON;
-	IICCON = temp & (~S3C44B0X_rIIC_INTPEND);
-
-	IICCON = IICCON | (1<<7);	/*restore ACK generation*/
-
-	return 0;
-}
-
-int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
-	int j, k;
-	u32 rIICSTAT, temp;
-
-
-	/*
-		send the device offset
-	*/
-
-	rIICSTAT = 0xD0;
-	IICSTAT = rIICSTAT;
-
-	IICDS = chip;	/* this is a write operation... */
-
-	rIICSTAT |= (1<<5);
-	IICSTAT = rIICSTAT;
-
-	IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
-	/* wait and check ACK */
-	for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-		temp = IICCON;
-		if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-		break;
-		udelay(2000);
-	}
-	if (k==S3C44B0_IIC_TIMEOUT)
-		return -1;
-
-	temp = IICSTAT;
-	if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
-		return -1;
-
-	IICDS = addr;
-	IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
-	/* wait and check ACK */
-	for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-		temp = IICCON;
-		if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-		break;
-		udelay(2000);
-	}
-	if (k==S3C44B0_IIC_TIMEOUT)
-	  return -1;
-
-	temp = IICSTAT;
-	if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
-		return -1;
-
-	/*
-		now we can start with the read write operation
-	*/
-	for (j=0; j<len; j++) {
-
-		IICDS = buffer[j]; /*prerare data to write*/
-
-		/*clear pending bit to resume*/
-
-		temp = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-		IICCON = temp;
-
-		/* wait but NOT check ACK */
-		for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
-			temp = IICCON;
-			if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
-			break;
-
-			udelay(2000);
-		}
-
-		if (k==S3C44B0_IIC_TIMEOUT)
-			return -1;
-
-	} /* end for(j) */
-
-	/* sending stop to terminate */
-	rIICSTAT = 0xD0;  /*master send*/
-	IICSTAT = rIICSTAT;
-	/*Clear Int Pending Bit to RESUME*/
-	temp = IICCON;
-	IICCON = temp & (~S3C44B0X_rIIC_INTPEND);
-
-	return 0;
-}
-- 
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