diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h
index 23a6077..924cea2 100644
--- a/arch/arm/include/asm/global_data.h
+++ b/arch/arm/include/asm/global_data.h
@@ -87,6 +87,9 @@ typedef	struct	global_data {
 	unsigned long	post_log_res; /* success of POST test */
 	unsigned long	post_init_f_time; /* When post_init_f started */
 #endif
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/avr32/include/asm/global_data.h b/arch/avr32/include/asm/global_data.h
index 5c654bd..605b1a7 100644
--- a/arch/avr32/include/asm/global_data.h
+++ b/arch/avr32/include/asm/global_data.h
@@ -50,6 +50,9 @@ typedef	struct	global_data {
 #endif
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/blackfin/include/asm/global_data.h b/arch/blackfin/include/asm/global_data.h
index 67aa30f..eacfd17 100644
--- a/arch/blackfin/include/asm/global_data.h
+++ b/arch/blackfin/include/asm/global_data.h
@@ -56,9 +56,11 @@ typedef struct global_data {
 	unsigned long post_log_res; 	/* success of POST test */
 	unsigned long post_init_f_time;	/* When post_init_f started */
 #endif
-
 	void	**jt;			/* jump table */
 	char	env_buf[32];		/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/m68k/include/asm/global_data.h b/arch/m68k/include/asm/global_data.h
index 0ba2b43..fb171f8 100644
--- a/arch/m68k/include/asm/global_data.h
+++ b/arch/m68k/include/asm/global_data.h
@@ -68,6 +68,9 @@ typedef	struct	global_data {
 #endif
 	void		**jt;		/* Standalone app jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/microblaze/include/asm/global_data.h b/arch/microblaze/include/asm/global_data.h
index 6e8537c..a43ca0d 100644
--- a/arch/microblaze/include/asm/global_data.h
+++ b/arch/microblaze/include/asm/global_data.h
@@ -47,6 +47,9 @@ typedef	struct	global_data {
 	unsigned long	fb_base;	/* base address of frame buffer */
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/mips/include/asm/global_data.h b/arch/mips/include/asm/global_data.h
index f6cf9fe..436c0c7 100644
--- a/arch/mips/include/asm/global_data.h
+++ b/arch/mips/include/asm/global_data.h
@@ -61,6 +61,9 @@ typedef	struct	global_data {
 	unsigned long	env_valid;	/* Checksum of Environment valid? */
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/nios2/include/asm/global_data.h b/arch/nios2/include/asm/global_data.h
index 4b86fbd..714e2f8 100644
--- a/arch/nios2/include/asm/global_data.h
+++ b/arch/nios2/include/asm/global_data.h
@@ -42,6 +42,9 @@ typedef	struct	global_data {
 #endif
 	void		**jt;		/* Standalone app jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /* flags */
diff --git a/arch/powerpc/include/asm/global_data.h b/arch/powerpc/include/asm/global_data.h
index 01f1d4a..96f2ad8 100644
--- a/arch/powerpc/include/asm/global_data.h
+++ b/arch/powerpc/include/asm/global_data.h
@@ -184,6 +184,9 @@ typedef	struct	global_data {
 #endif
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/sh/include/asm/global_data.h b/arch/sh/include/asm/global_data.h
index 1b782fc..7b25d8f 100644
--- a/arch/sh/include/asm/global_data.h
+++ b/arch/sh/include/asm/global_data.h
@@ -42,6 +42,9 @@ typedef	struct global_data
 	unsigned long	env_valid;	/* Checksum of Environment valid */
 	void		**jt;		/* Standalone app jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 #define	GD_FLG_RELOC		0x00001	/* Code was relocated to RAM		*/
diff --git a/arch/sparc/include/asm/global_data.h b/arch/sparc/include/asm/global_data.h
index 613e2d8..6a86b69 100644
--- a/arch/sparc/include/asm/global_data.h
+++ b/arch/sparc/include/asm/global_data.h
@@ -76,6 +76,9 @@ typedef struct global_data {
 #endif
 	void	**jt;			/* jump table */
 	char	env_buf[32];		/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 /*
diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h
index 05a2139..4713b41 100644
--- a/arch/x86/include/asm/global_data.h
+++ b/arch/x86/include/asm/global_data.h
@@ -55,6 +55,9 @@ typedef	struct global_data {
 	unsigned long	reset_status;	/* reset status register at boot */
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_SYS_I2C)
+	void		*cur_adap;	/* current used i2c adapter */
+#endif
 } gd_t;
 
 extern gd_t *gd;
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index c123c72..ebedef2 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -45,6 +45,7 @@ COBJS-$(CONFIG_TEGRA2_I2C) += tegra2_i2c.o
 COBJS-$(CONFIG_TSI108_I2C) += tsi108_i2c.o
 COBJS-$(CONFIG_U8500_I2C) += u8500_i2c.o
 COBJS-$(CONFIG_SH_I2C) += sh_i2c.o
+COBJS-$(CONFIG_SYS_I2C) += i2c_core.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/i2c/i2c_core.c b/drivers/i2c/i2c_core.c
new file mode 100644
index 0000000..139f4c9
--- /dev/null
+++ b/drivers/i2c/i2c_core.c
@@ -0,0 +1,360 @@
+/*
+ * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * Multibus/multiadapter I2C core functions (wrappers)
+ */
+#include <common.h>
+#include <i2c.h>
+
+#ifdef CONFIG_TEGRA2_I2C
+extern struct i2c_adapter tegra_i2c_adap[];
+#endif
+
+struct i2c_adapter *i2c_adap[CONFIG_SYS_NUM_I2C_ADAPTERS] =
+			CONFIG_SYS_I2C_ADAPTERS;
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+struct i2c_bus	i2c_bus[CONFIG_SYS_NUM_I2C_BUSSES] = CONFIG_SYS_I2C_BUSSES;
+#endif
+
+static unsigned int i2c_cur_bus __attribute__((section(".data"))) =
+				CONFIG_SYS_SPD_BUS_NUM;
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void i2c_reloc_fixup(void)
+{
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+	int		i;
+	unsigned long	addr;
+
+	for (i = 0; i < CONFIG_SYS_NUM_I2C_ADAPTERS; i++) {
+		/* Adapter itself */
+		addr = (unsigned long)i2c_adap[i];
+		if (addr != 0)
+			addr += gd->reloc_off;
+
+		i2c_adap[i] = (struct i2c_adapter *)addr;
+		/* i2c_init() */
+		addr = (unsigned long)i2c_adap[i]->init;
+		if (addr != 0)
+			addr += gd->reloc_off;
+
+		i2c_adap[i]->init = (void (*)(int, int))addr;
+		/* i2c_probe() */
+		addr = (unsigned long)i2c_adap[i]->probe;
+		if (addr != 0)
+			addr += gd->reloc_off;
+
+		i2c_adap[i]->probe = (int (*)(u_int8_t))addr;
+		/* i2c_read() */
+		addr = (unsigned long)i2c_adap[i]->read;
+		if (addr != 0)
+			addr += gd->reloc_off;
+
+		i2c_adap[i]->read = (int (*)(u_int8_t, uint, int, u_int8_t *,
+					int))addr;
+		/* i2c_write() */
+		addr = (unsigned long)i2c_adap[i]->write;
+		if (addr != 0)
+			addr += gd->reloc_off;
+
+		i2c_adap[i]->write = (int (*)(u_int8_t, uint, int, u_int8_t *,
+					int))addr;
+		/* i2c_set_bus_speed() */
+		addr = (unsigned long)i2c_adap[i]->set_bus_speed;
+		if (addr != 0)
+			addr += gd->reloc_off;
+
+		i2c_adap[i]->set_bus_speed = (uint (*)(uint))addr;
+		/* name */
+		addr = (unsigned long)i2c_adap[i]->name;
+		if (addr != 0)
+			addr += gd->reloc_off;
+
+		i2c_adap[i]->name = (char *)addr;
+	}
+	gd->cur_adap += gd->reloc_off;
+#else
+	/*
+	 * we need this here to set after relocation gd->cur_adap
+	 * to the new relocated value.
+	 */
+	gd->cur_adap = NULL;
+	i2c_set_bus_num(i2c_cur_bus);
+#endif
+}
+
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+/*
+ * i2c_mux_set()
+ * -------------
+ *
+ * This turns on the given channel on I2C multiplexer chip connected to
+ * a given I2C adapter directly or via other multiplexers. In the latter
+ * case the entire multiplexer chain must be initialized first starting
+ * with the one connected directly to the adapter. When disabling a chain
+ * muxes must be programmed in reverse order, starting with the one
+ * farthest from the adapter.
+ *
+ * mux_id is the multiplexer chip type from defined in i2c.h. So far only
+ * NXP (Philips) PCA954x multiplexers are supported. Switches are NOT
+ * supported (anybody uses them?)
+ */
+
+static int i2c_mux_set(int adapter, int mux_id, int chip, int channel)
+{
+	u_int8_t	buf;
+
+	/* channel < 0 - turn off the mux */
+	if (channel < 0) {
+		buf = 0;
+		return i2c_adap[adapter]->write(chip, 0, 0, &buf, 1);
+	}
+
+	switch (mux_id) {
+	case I2C_MUX_PCA9540_ID:
+	case I2C_MUX_PCA9542_ID:
+		if (channel > 1)
+			return -1;
+		buf = (u_int8_t)((channel & 0x01) | (1 << 2));
+		break;
+	case I2C_MUX_PCA9544_ID:
+		if (channel > 3)
+			return -1;
+		buf = (u_int8_t)((channel & 0x03) | (1 << 2));
+		break;
+	case I2C_MUX_PCA9547_ID:
+		if (channel > 7)
+			return -1;
+		buf = (u_int8_t)((channel & 0x07) | (1 << 3));
+		break;
+	default:
+		return -1;
+	}
+
+	return i2c_adap[adapter]->write(chip, 0, 0, &buf, 1);
+}
+#endif
+
+/*
+ * i2c_init_bus():
+ * ---------------
+ *
+ * Initializes one bus. Will initialize the parent adapter. No current bus
+ * changes, no mux (if any) setup.
+ */
+static void i2c_init_bus(unsigned int bus_no, int speed, int slaveaddr)
+{
+	if (bus_no >= CONFIG_SYS_NUM_I2C_BUSSES)
+		return;
+
+	I2C_ADAP->init(speed, slaveaddr);
+
+	if (gd->flags & GD_FLG_RELOC) {
+		I2C_ADAP->init_done = 1;
+		I2C_ADAP->speed = speed;
+		I2C_ADAP->slaveaddr = slaveaddr;
+	}
+}
+
+/*
+ * i2c_init_all():
+ *
+ * not longer needed, will deleted. Actual init the SPD_BUS
+ * for compatibility.
+ * i2c_adap[] must be initialized beforehead with function pointers and
+ * data, including speed and slaveaddr.
+ */
+void i2c_init_all(void)
+{
+	i2c_set_bus_num(CONFIG_SYS_SPD_BUS_NUM);
+	return;
+}
+
+/*
+ * i2c_get_bus_num():
+ * ------------------
+ *
+ *  Returns index of currently active I2C bus.  Zero-based.
+ */
+unsigned int i2c_get_bus_num(void)
+{
+	return i2c_cur_bus;
+}
+
+/*
+ * i2c_set_bus_num():
+ * ------------------
+ *
+ *  Change the active I2C bus. Subsequent read/write calls will
+ *  go to this one. Sets all of the muxes in a proper condition
+ *  if that bus is behind muxes.
+ *  If previously selected bus is behind the muxes turns off all the
+ *  muxes along the path to that bus.
+ *
+ *	bus - bus index, zero based
+ *
+ *	Returns: 0 on success, not 0 on failure
+ */
+int i2c_set_bus_num(unsigned int bus)
+{
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+	int		i;
+	u_int8_t	buf;
+#endif
+
+	if (bus >= CONFIG_SYS_NUM_I2C_BUSSES)
+		return -1;
+
+	if (gd->cur_adap == NULL)
+		gd->cur_adap = I2C_ADAP_NR(bus);
+	else if ((bus == i2c_cur_bus) &&
+		(I2C_ADAP->init_done > 0))
+		return 0;
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+	else {
+		/* Disconnect current bus (turn off muxes if any) */
+		if ((i2c_bus[i2c_cur_bus].next_hop[0].chip != 0) &&
+		    (I2C_ADAP->init_done != 0)) {
+			i = CONFIG_SYS_I2C_MAX_HOPS;
+			do {
+				u_int8_t	chip;
+
+				chip = i2c_bus[i2c_cur_bus].next_hop[--i].chip;
+				if (chip == 0)
+					continue;
+
+				I2C_ADAP->write(chip, 0, 0, &buf, 1);
+			} while (i > 0);
+		}
+	}
+#endif
+
+	gd->cur_adap = I2C_ADAP_NR(bus);
+	if (I2C_ADAP->init_done == 0)
+		i2c_init_bus(bus, I2C_ADAP->speed, I2C_ADAP->slaveaddr);
+
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+	/* Connect requested bus if behind muxes */
+	if (i2c_bus[bus].next_hop[0].chip != 0) {
+
+		/* Set all muxes along the path to that bus */
+		for (i = 0; i < CONFIG_SYS_I2C_MAX_HOPS; i++) {
+			int	ret;
+
+			if (i2c_bus[bus].next_hop[i].chip == 0)
+				break;
+
+			ret = i2c_mux_set(i2c_bus[bus].adapter,
+					i2c_bus[bus].next_hop[i].mux.id,
+					i2c_bus[bus].next_hop[i].chip,
+					i2c_bus[bus].next_hop[i].channel);
+			if (ret != 0) {
+				printf("%s: could not set mux: id: %d "\
+					"chip: %x channel: %d\n", __func__,
+					i2c_bus[bus].next_hop[i].mux.id,
+					i2c_bus[bus].next_hop[i].chip,
+					i2c_bus[bus].next_hop[i].channel);
+
+			}
+		}
+	}
+#endif
+
+	i2c_cur_bus = bus;
+	return 0;
+}
+
+/*
+ * Probe the given I2C chip address.  Returns 0 if a chip responded,
+ * not 0 on failure.
+ */
+int i2c_probe(u_int8_t chip)
+{
+	return I2C_ADAP->probe(chip);
+}
+
+/*
+ * 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
+ */
+int i2c_read(u_int8_t chip, unsigned int addr, int alen,
+				u_int8_t *buffer, int len)
+{
+	return I2C_ADAP->read(chip, addr, alen, buffer, len);
+}
+
+int i2c_write(u_int8_t chip, unsigned int addr, int alen,
+				u_int8_t *buffer, int len)
+{
+	return I2C_ADAP->write(chip, addr, alen, buffer, len);
+}
+
+unsigned int i2c_set_bus_speed(unsigned int speed)
+{
+	unsigned int ret;
+
+	if (I2C_ADAP->set_bus_speed == NULL)
+		return 0;
+	ret = I2C_ADAP->set_bus_speed(speed);
+	if (gd->flags & GD_FLG_RELOC)
+		I2C_ADAP->speed = ret;
+
+	return ret;
+}
+
+unsigned int i2c_get_bus_speed(void)
+{
+	struct i2c_adapter *cur = I2C_ADAP;
+	return cur->speed;
+}
+
+u_int8_t i2c_reg_read(u_int8_t addr, u_int8_t reg)
+{
+	u_int8_t buf;
+
+#ifdef CONFIG_8xx
+	/* MPC8xx needs this.  Maybe one day we can get rid of it. */
+	/* maybe it is now the time for it ... */
+	i2c_set_bus_num(i2c_cur_bus);
+#endif
+	i2c_read(addr, reg, 1, &buf, 1);
+
+#ifdef DEBUG
+	printf("%s: bus=%d addr=0x%02x, reg=0x%02x, val=0x%02x\n",
+		 __func__, i2c_cur_bus, addr, reg, buf);
+#endif
+
+	return buf;
+}
+
+void i2c_reg_write(u_int8_t addr, u_int8_t reg, u_int8_t val)
+{
+#ifdef CONFIG_8xx
+	/* MPC8xx needs this.  Maybe one day we can get rid of it. */
+	/* maybe it is now the time for it ... */
+	i2c_set_bus_num(i2c_cur_bus);
+#endif
+
+#ifdef DEBUG
+	printf("%s: bus=%d addr=0x%02x, reg=0x%02x, val=0x%02x\n",
+	       __func__, i2c_cur_bus, addr, reg, val);
+#endif
+
+	i2c_write(addr, reg, 1, &val, 1);
+}
+
+void __i2c_init(int speed, int slaveaddr)
+{
+	i2c_init_bus(i2c_cur_bus, speed, slaveaddr);
+}
+void i2c_init(int speed, int slaveaddr)
+	__attribute__((weak, alias("__i2c_init")));
diff --git a/include/i2c.h b/include/i2c.h
index ee31034..910552d 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -1,4 +1,8 @@
 /*
+ * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
+ * Copyright (C) 2009 Heiko Schocher <hs@denx.de>
+ * Changes for multibus/multiadapter I2C support.
+ *
  * (C) Copyright 2001
  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
  *
@@ -46,16 +50,20 @@
  */
 #define I2C_RXTX_LEN	128	/* maximum tx/rx buffer length */
 
-#ifdef	CONFIG_I2C_MULTI_BUS
-#define	MAX_I2C_BUS			2
-#define	I2C_MULTI_BUS			1
-#else
-#define	MAX_I2C_BUS			1
-#define	I2C_MULTI_BUS			0
+#ifndef CONFIG_SYS_NUM_I2C_ADAPTERS
+#define CONFIG_SYS_NUM_I2C_ADAPTERS	1
 #endif
 
-#if !defined(CONFIG_SYS_MAX_I2C_BUS)
-#define CONFIG_SYS_MAX_I2C_BUS		MAX_I2C_BUS
+#if !defined(CONFIG_SYS_I2C_MAX_HOPS) || (CONFIG_SYS_I2C_MAX_HOPS == 0)
+#define CONFIG_SYS_I2C_DIRECT_BUS	1
+#if !defined(CONFIG_SYS_NUM_I2C_BUSSES)
+#define CONFIG_SYS_NUM_I2C_BUSSES	CONFIG_SYS_NUM_I2C_ADAPTERS
+#endif
+#else
+#undef CONFIG_SYS_I2C_DIRECT_BUS
+#ifndef CONFIG_SYS_NUM_I2C_BUSSES
+#define CONFIG_SYS_NUM_I2C_BUSSES	1
+#endif
 #endif
 
 /* define the I2C bus number for RTC and DTT if not already done */
@@ -69,6 +77,65 @@
 #define CONFIG_SYS_SPD_BUS_NUM		0
 #endif
 
+struct i2c_adapter {
+	void		(*init)(int speed, int slaveaddr);
+	int		(*probe)(u_int8_t chip);
+	int		(*read)(u_int8_t chip, uint addr, int alen,
+				u_int8_t *buffer, int len);
+	int		(*write)(u_int8_t chip, uint addr, int alen,
+				u_int8_t *buffer, int len);
+	uint		(*set_bus_speed)(uint speed);
+
+	int		speed;
+	int		slaveaddr;
+	int		init_done;
+	int		hwadapnr;
+	char		*name;
+};
+
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+#define	I2C_ADAP_NR(bus)	i2c_adap[i2c_bus[(bus)].adapter]
+#else
+#define	I2C_ADAP_NR(bus)	i2c_adap[bus]
+#endif
+#define	I2C_ADAP		((struct i2c_adapter *)gd->cur_adap)
+
+#define I2C_ADAP_HWNR		(I2C_ADAP->hwadapnr)
+
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+#define I2C_MUX_PCA9540_ID	1
+#define I2C_MUX_PCA9540		{I2C_MUX_PCA9540_ID, "PCA9540B"}
+#define I2C_MUX_PCA9542_ID	2
+#define I2C_MUX_PCA9542		{I2C_MUX_PCA9542_ID, "PCA9542A"}
+#define I2C_MUX_PCA9544_ID	3
+#define I2C_MUX_PCA9544		{I2C_MUX_PCA9544_ID, "PCA9544A"}
+#define I2C_MUX_PCA9547_ID	4
+#define I2C_MUX_PCA9547		{I2C_MUX_PCA9547_ID, "PCA9547A"}
+
+struct i2c_mux {
+	int	id;
+	char	name[16];
+};
+
+struct i2c_next_hop {
+	i2c_mux_t		mux;
+	u_int8_t		chip;
+	u_int8_t		channel;
+};
+
+struct i2c_bus_hose {
+	int		adapter;
+	i2c_next_hop_t	next_hop[CONFIG_SYS_I2C_MAX_HOPS];
+};
+
+#define I2C_NULL_HOP	{{-1, ""}, 0, 0}
+
+extern i2c_bus_t	i2c_bus[];
+#endif
+
+extern struct i2c_adapter	*i2c_adap[];
+extern struct i2c_adapter	*cur_adap_nr;
+
 #ifndef I2C_SOFT_DECLARATIONS
 # if defined(CONFIG_MPC8260)
 #  define I2C_SOFT_DECLARATIONS volatile ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, I2C_PORT);
@@ -108,7 +175,7 @@
  * repeatedly to change the speed and slave addresses.
  */
 void i2c_init(int speed, int slaveaddr);
-void i2c_init_board(void);
+int i2c_init_board(void);
 #ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT
 void i2c_board_late_init(void);
 #endif
@@ -134,6 +201,104 @@ int i2x_mux_select_mux(int bus);
 int i2c_mux_ident_muxstring_f (uchar *buf);
 #endif
 
+#ifdef CONFIG_SYS_I2C
+/*
+ * Initialization, must be called once on start up, may be called
+ * repeatedly to change the speed and slave addresses.
+ */
+void i2c_init(unsigned int speed, int slaveaddr);
+#ifdef CONFIG_SYS_I2C_INIT_BOARD
+void i2c_init_board(void);
+#endif
+
+/*
+ * i2c_get_bus_num:
+ *
+ *  Returns index of currently active I2C bus.  Zero-based.
+ */
+unsigned int i2c_get_bus_num(void);
+
+/*
+ * i2c_set_bus_num:
+ *
+ *  Change the active I2C bus.  Subsequent read/write calls will
+ *  go to this one.
+ *
+ *	bus - bus index, zero based
+ *
+ *	Returns: 0 on success, not 0 on failure
+ *
+ */
+int i2c_set_bus_num(unsigned int bus);
+
+/*
+ * i2c_init_all():
+ *
+ * Initializes all I2C adapters in the system. All i2c_adap structures must
+ * be initialized beforehead with function pointers and data, including
+ * speed and slaveaddr. Returns 0 on success, non-0 on failure.
+ */
+void i2c_init_all(void);
+
+/*
+ * Probe the given I2C chip address.  Returns 0 if a chip responded,
+ * not 0 on failure.
+ */
+int i2c_probe(u_int8_t chip);
+
+/*
+ * 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
+ */
+int i2c_read(u_int8_t chip, unsigned int addr, int alen,
+				u_int8_t *buffer, int len);
+
+int i2c_write(u_int8_t chip, unsigned int addr, int alen,
+				u_int8_t *buffer, int len);
+
+/*
+ * Utility routines to read/write registers.
+ */
+u_int8_t i2c_reg_read(u_int8_t addr, u_int8_t reg);
+
+void i2c_reg_write(u_int8_t addr, u_int8_t reg, u_int8_t val);
+
+/*
+ * i2c_set_bus_speed:
+ *
+ *  Change the speed of the active I2C bus
+ *
+ *	speed - bus speed in Hz
+ *
+ *	Returns: new bus speed
+ *
+ */
+unsigned int i2c_set_bus_speed(unsigned int speed);
+
+/*
+ * i2c_get_bus_speed:
+ *
+ *  Returns speed of currently active I2C bus in Hz
+ */
+
+unsigned int i2c_get_bus_speed(void);
+
+/*
+ * i2c_reloc_fixup:
+ *
+ * Adjusts I2C pointers after U-Boot is relocated to DRAM
+ */
+void i2c_reloc_fixup(void);
+#else
+
 /*
  * Probe the given I2C chip address.  Returns 0 if a chip responded,
  * not 0 on failure.
@@ -235,6 +400,22 @@ int i2c_set_bus_speed(unsigned int);
  */
 
 unsigned int i2c_get_bus_speed(void);
+#endif /* CONFIG_SYS_I2C */
+
+/*
+ * only for backwardcompatibility, should go away if we switched
+ * completely to new multibus support.
+ */
+#if (CONFIG_SYS_NUM_I2C_BUSSES > 1) || defined(CONFIG_I2C_MULTI_BUS)
+# if !defined(CONFIG_SYS_MAX_I2C_BUS)
+#  define CONFIG_SYS_MAX_I2C_BUS		2
+# endif
+# define I2C_MULTI_BUS				0
+#else
+# define CONFIG_SYS_MAX_I2C_BUS		1
+# define I2C_MULTI_BUS				0
+#endif
+
 
 /* NOTE: These two functions MUST be always_inline to avoid code growth! */
 static inline unsigned int I2C_GET_BUS(void) __attribute__((always_inline));
