Merge with http://opensource.freescale.com/pub/scm/u-boot-83xx.git

1 files changed, 91 insertions, 39 deletions

diff --git a/drivers/fsl_i2c.c b/drivers/fsl_i2c.c
index 65c2743..c929096 100644
--- a/drivers/fsl_i2c.c
+++ b/drivers/fsl_i2c.c
@@ -28,29 +28,52 @@
 #include <asm/fsl_i2c.h>	/* HW definitions */
 
 #define I2C_TIMEOUT	(CFG_HZ / 4)
-#define I2C		((struct fsl_i2c *)(CFG_IMMR + CFG_I2C_OFFSET))
 
+#define I2C_READ_BIT  1
+#define I2C_WRITE_BIT 0
+
+/* Initialize the bus pointer to whatever one the SPD EEPROM is on.
+ * Default is bus 0.  This is necessary because the DDR initialization
+ * runs from ROM, and we can't switch buses because we can't modify
+ * the global variables.
+ */
+#ifdef CFG_SPD_BUS_NUM
+static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = CFG_SPD_BUS_NUM;
+#else
+static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = 0;
+#endif
+
+static volatile struct fsl_i2c *i2c_dev[2] = {
+	(struct fsl_i2c *) (CFG_IMMR + CFG_I2C_OFFSET),
+#ifdef CFG_I2C2_OFFSET
+	(struct fsl_i2c *) (CFG_IMMR + CFG_I2C2_OFFSET)
+#endif
+};
 
 void
 i2c_init(int speed, int slaveadd)
 {
-	/* stop I2C controller */
-	writeb(0x0, &I2C->cr);
-
-	/* set clock */
-	writeb(0x3f, &I2C->fdr);
-
-	/* set default filter */
-	writeb(0x10, &I2C->dfsrr);
-
-	/* write slave address */
-	writeb(slaveadd, &I2C->adr);
-
-	/* clear status register */
-	writeb(0x0, &I2C->sr);
-
-	/* start I2C controller */
-	writeb(I2C_CR_MEN, &I2C->cr);
+	volatile struct fsl_i2c *dev;
+
+	dev = (struct fsl_i2c *) (CFG_IMMR + CFG_I2C_OFFSET);
+
+	writeb(0, &dev->cr);			/* stop I2C controller */
+	writeb(0x3F, &dev->fdr);		/* set bus speed */
+	writeb(0x3F, &dev->dfsrr);		/* set default filter */
+	writeb(slaveadd << 1, &dev->adr);	/* write slave address */
+	writeb(0x0, &dev->sr);			/* clear status register */
+	writeb(I2C_CR_MEN, &dev->cr);		/* start I2C controller */
+
+#ifdef	CFG_I2C2_OFFSET
+	dev = (struct fsl_i2c *) (CFG_IMMR + CFG_I2C2_OFFSET);
+
+	writeb(0, &dev->cr);			/* stop I2C controller */
+	writeb(0x3F, &dev->fdr);		/* set bus speed */
+	writeb(0x3F, &dev->dfsrr);		/* set default filter */
+	writeb(slaveadd, &dev->adr);		/* write slave address */
+	writeb(0x0, &dev->sr);			/* clear status register */
+	writeb(I2C_CR_MEN, &dev->cr);		/* start I2C controller */
+#endif	/* CFG_I2C2_OFFSET */
 }
 
 static __inline__ int
@@ -58,7 +81,7 @@ i2c_wait4bus(void)
 {
 	ulong timeval = get_timer(0);
 
-	while (readb(&I2C->sr) & I2C_SR_MBB) {
+	while (readb(&i2c_dev[i2c_bus_num]->sr) & I2C_SR_MBB) {
 		if (get_timer(timeval) > I2C_TIMEOUT) {
 			return -1;
 		}
@@ -74,11 +97,11 @@ i2c_wait(int write)
 	ulong timeval = get_timer(0);
 
 	do {
-		csr = readb(&I2C->sr);
+		csr = readb(&i2c_dev[i2c_bus_num]->sr);
 		if (!(csr & I2C_SR_MIF))
 			continue;
 
-		writeb(0x0, &I2C->sr);
+		writeb(0x0, &i2c_dev[i2c_bus_num]->sr);
 
 		if (csr & I2C_SR_MAL) {
 			debug("i2c_wait: MAL\n");
@@ -90,7 +113,7 @@ i2c_wait(int write)
 			return -1;
 		}
 
-		if (write == I2C_WRITE && (csr & I2C_SR_RXAK)) {
+		if (write == I2C_WRITE_BIT && (csr & I2C_SR_RXAK)) {
 			debug("i2c_wait: No RXACK\n");
 			return -1;
 		}
@@ -107,11 +130,11 @@ i2c_write_addr (u8 dev, u8 dir, int rsta)
 {
 	writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX
 	       | (rsta ? I2C_CR_RSTA : 0),
-	       &I2C->cr);
+	       &i2c_dev[i2c_bus_num]->cr);
 
-	writeb((dev << 1) | dir, &I2C->dr);
+	writeb((dev << 1) | dir, &i2c_dev[i2c_bus_num]->dr);
 
-	if (i2c_wait(I2C_WRITE) < 0)
+	if (i2c_wait(I2C_WRITE_BIT) < 0)
 		return 0;
 
 	return 1;
@@ -123,12 +146,12 @@ __i2c_write(u8 *data, int length)
 	int i;
 
 	writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX,
-	       &I2C->cr);
+	       &i2c_dev[i2c_bus_num]->cr);
 
 	for (i = 0; i < length; i++) {
-		writeb(data[i], &I2C->dr);
+		writeb(data[i], &i2c_dev[i2c_bus_num]->dr);
 
-		if (i2c_wait(I2C_WRITE) < 0)
+		if (i2c_wait(I2C_WRITE_BIT) < 0)
 			break;
 	}
 
@@ -141,25 +164,25 @@ __i2c_read(u8 *data, int length)
 	int i;
 
 	writeb(I2C_CR_MEN | I2C_CR_MSTA | ((length == 1) ? I2C_CR_TXAK : 0),
-	       &I2C->cr);
+	       &i2c_dev[i2c_bus_num]->cr);
 
 	/* dummy read */
-	readb(&I2C->dr);
+	readb(&i2c_dev[i2c_bus_num]->dr);
 
 	for (i = 0; i < length; i++) {
-		if (i2c_wait(I2C_READ) < 0)
+		if (i2c_wait(I2C_READ_BIT) < 0)
 			break;
 
 		/* Generate ack on last next to last byte */
 		if (i == length - 2)
 			writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_TXAK,
-			       &I2C->cr);
+			       &i2c_dev[i2c_bus_num]->cr);
 
 		/* Generate stop on last byte */
 		if (i == length - 1)
-			writeb(I2C_CR_MEN | I2C_CR_TXAK, &I2C->cr);
+			writeb(I2C_CR_MEN | I2C_CR_TXAK, &i2c_dev[i2c_bus_num]->cr);
 
-		data[i] = readb(&I2C->dr);
+		data[i] = readb(&i2c_dev[i2c_bus_num]->dr);
 	}
 
 	return i;
@@ -172,13 +195,13 @@ i2c_read(u8 dev, uint addr, int alen, u8 *data, int length)
 	u8 *a = (u8*)&addr;
 
 	if (i2c_wait4bus() >= 0
-	    && i2c_write_addr(dev, I2C_WRITE, 0) != 0
+	    && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0
 	    && __i2c_write(&a[4 - alen], alen) == alen
-	    && i2c_write_addr(dev, I2C_READ, 1) != 0) {
+	    && i2c_write_addr(dev, I2C_READ_BIT, 1) != 0) {
 		i = __i2c_read(data, length);
 	}
 
-	writeb(I2C_CR_MEN, &I2C->cr);
+	writeb(I2C_CR_MEN, &i2c_dev[i2c_bus_num]->cr);
 
 	if (i == length)
 	    return 0;
@@ -193,12 +216,12 @@ i2c_write(u8 dev, uint addr, int alen, u8 *data, int length)
 	u8 *a = (u8*)&addr;
 
 	if (i2c_wait4bus() >= 0
-	    && i2c_write_addr(dev, I2C_WRITE, 0) != 0
+	    && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0
 	    && __i2c_write(&a[4 - alen], alen) == alen) {
 		i = __i2c_write(data, length);
 	}
 
-	writeb(I2C_CR_MEN, &I2C->cr);
+	writeb(I2C_CR_MEN, &i2c_dev[i2c_bus_num]->cr);
 
 	if (i == length)
 	    return 0;
@@ -237,5 +260,34 @@ i2c_reg_write(uchar i2c_addr, uchar reg, uchar val)
 	i2c_write(i2c_addr, reg, 1, &val, 1);
 }
 
+int i2c_set_bus_num(unsigned int bus)
+{
+#ifdef CFG_I2C2_OFFSET
+	if (bus > 1) {
+#else
+	if (bus > 0) {
+#endif
+		return -1;
+	}
+
+	i2c_bus_num = bus;
+
+	return 0;
+}
+
+int i2c_set_bus_speed(unsigned int speed)
+{
+	return -1;
+}
+
+unsigned int i2c_get_bus_num(void)
+{
+	return i2c_bus_num;
+}
+
+unsigned int i2c_get_bus_speed(void)
+{
+	return 0;
+}
 #endif /* CONFIG_HARD_I2C */
 #endif /* CONFIG_FSL_I2C */