Merge with /home/hs/jupiter/u-boot

[oweals/u-boot.git] / include / i2c.h

diff --git a/include/i2c.h b/include/i2c.h
index 43d76fd818550d48c3679e489850580cb7547b2b..6e6c84531277e7683ac3dc98e05bee929054df06 100644 (file)
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -46,11 +46,35 @@
  */
 #define I2C_RXTX_LEN   128     /* maximum tx/rx buffer length */
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+#define CFG_MAX_I2C_BUS                2
+#define I2C_GET_BUS()          i2c_get_bus_num()
+#define I2C_SET_BUS(a)         i2c_set_bus_num(a)
+#else
+#define CFG_MAX_I2C_BUS                1
+#define I2C_GET_BUS()          0
+#define I2C_SET_BUS(a)
+#endif
+
+/* define the I2C bus number for RTC and DTT if not already done */
+#if !defined(CFG_RTC_BUS_NUM)
+#define CFG_RTC_BUS_NUM                0
+#endif
+#if !defined(CFG_DTT_BUS_NUM)
+#define CFG_DTT_BUS_NUM                0
+#endif
+#if !defined(CFG_SPD_BUS_NUM)
+#define CFG_SPD_BUS_NUM                0
+#endif
+
 /*
  * 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);
+#ifdef CFG_I2C_INIT_BOARD
+void i2c_init_board(void);
+#endif
 
 /*
  * Probe the given I2C chip address.  Returns 0 if a chip responded,
@@ -79,4 +103,49 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len);
 uchar i2c_reg_read (uchar chip, uchar reg);
 void  i2c_reg_write(uchar chip, uchar reg, uchar val);
 
+/*
+ * Functions for setting the current I2C bus and its speed
+ */
+
+/*
+ * 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_get_bus_num:
+ *
+ *  Returns index of currently active I2C bus.  Zero-based.
+ */
+
+unsigned int i2c_get_bus_num(void);
+
+/*
+ * i2c_set_bus_speed:
+ *
+ *  Change the speed of the active I2C bus
+ *
+ *     speed - bus speed in Hz
+ *
+ *     Returns: 0 on success, not 0 on failure
+ *
+ */
+int i2c_set_bus_speed(unsigned int);
+
+/*
+ * i2c_get_bus_speed:
+ *
+ *  Returns speed of currently active I2C bus in Hz
+ */
+
+unsigned int i2c_get_bus_speed(void);
+
 #endif /* _I2C_H_ */