galaxy5200: Add default environment variables

[karo-tx-uboot.git] / include / i2c.h

diff --git a/include/i2c.h b/include/i2c.h
index 97e006163a9ab8261442ce75661b8f560cadd9d2..b75476980bf2292cdc01658f4821f18c5687084e 100644 (file)
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -46,15 +46,90 @@
  */
 #define I2C_RXTX_LEN   128     /* maximum tx/rx buffer length */
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+#if !defined(CONFIG_SYS_MAX_I2C_BUS)
+#define CONFIG_SYS_MAX_I2C_BUS         2
+#endif
+#define I2C_GET_BUS()          i2c_get_bus_num()
+#define I2C_SET_BUS(a)         i2c_set_bus_num(a)
+#else
+#define CONFIG_SYS_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(CONFIG_SYS_RTC_BUS_NUM)
+#define CONFIG_SYS_RTC_BUS_NUM         0
+#endif
+#if !defined(CONFIG_SYS_DTT_BUS_NUM)
+#define CONFIG_SYS_DTT_BUS_NUM         0
+#endif
+#if !defined(CONFIG_SYS_SPD_BUS_NUM)
+#define CONFIG_SYS_SPD_BUS_NUM         0
+#endif
+
+#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);
+# elif defined(CONFIG_8xx)
+#  define I2C_SOFT_DECLARATIONS        volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
+# else
+#  define I2C_SOFT_DECLARATIONS
+# endif
+#endif
+
+#ifdef CONFIG_8xx
+/* Set default value for the I2C bus speed on 8xx. In the
+ * future, we'll define these in all 8xx board config files.
+ */
+#ifndef        CONFIG_SYS_I2C_SPEED
+#define        CONFIG_SYS_I2C_SPEED    50000
+#endif
+#endif
+
+/*
+ * Many boards/controllers/drivers don't support an I2C slave interface so
+ * provide a default slave address for them for use in common code.  A real
+ * value for CONFIG_SYS_I2C_SLAVE should be defined for any board which does
+ * support a slave interface.
+ */
+#ifndef        CONFIG_SYS_I2C_SLAVE
+#define        CONFIG_SYS_I2C_SLAVE    0xfe
+#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
+#ifdef CONFIG_SYS_I2C_INIT_BOARD
 void i2c_init_board(void);
 #endif
 
+#if defined(CONFIG_I2C_MUX)
+
+typedef struct _mux {
+       uchar   chip;
+       uchar   channel;
+       char    *name;
+       struct _mux     *next;
+} I2C_MUX;
+
+typedef struct _mux_device {
+       int     busid;
+       I2C_MUX *mux;   /* List of muxes, to reach the device */
+       struct _mux_device      *next;
+} I2C_MUX_DEVICE;
+
+int    i2c_mux_add_device(I2C_MUX_DEVICE *dev);
+
+I2C_MUX_DEVICE *i2c_mux_search_device(int id);
+I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf);
+int i2x_mux_select_mux(int bus);
+int i2c_mux_ident_muxstring_f (uchar *buf);
+#endif
+
 /*
  * Probe the given I2C chip address.  Returns 0 if a chip responded,
  * not 0 on failure.
@@ -79,8 +154,38 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len);
 /*
  * Utility routines to read/write registers.
  */
-uchar i2c_reg_read (uchar chip, uchar reg);
-void  i2c_reg_write(uchar chip, uchar reg, uchar val);
+static inline u8 i2c_reg_read(u8 addr, u8 reg)
+{
+       u8 buf;
+
+#ifdef CONFIG_8xx
+       /* MPC8xx needs this.  Maybe one day we can get rid of it. */
+       i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#endif
+
+#ifdef DEBUG
+       printf("%s: addr=0x%02x, reg=0x%02x\n", __func__, addr, reg);
+#endif
+
+       i2c_read(addr, reg, 1, &buf, 1);
+
+       return buf;
+}
+
+static inline void i2c_reg_write(u8 addr, u8 reg, u8 val)
+{
+#ifdef CONFIG_8xx
+       /* MPC8xx needs this.  Maybe one day we can get rid of it. */
+       i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#endif
+
+#ifdef DEBUG
+       printf("%s: addr=0x%02x, reg=0x%02x, val=0x%02x\n",
+              __func__, addr, reg, val);
+#endif
+
+       i2c_write(addr, reg, 1, &val, 1);
+}
 
 /*
  * Functions for setting the current I2C bus and its speed
@@ -92,12 +197,12 @@ void  i2c_reg_write(uchar chip, uchar reg, uchar val);
  *  Change the active I2C bus.  Subsequent read/write calls will
  *  go to this one.
  *
- *     bus - bus index, zero based
+ *     bus - bus index, zero based
  *
- *     Returns: 0 on success, not 0 on failure
+ *     Returns: 0 on success, not 0 on failure
  *
  */
-int            i2c_set_bus_num(uchar bus);
+int i2c_set_bus_num(unsigned int bus);
 
 /*
  * i2c_get_bus_num:
@@ -105,19 +210,19 @@ int               i2c_set_bus_num(uchar bus);
  *  Returns index of currently active I2C bus.  Zero-based.
  */
 
-uchar  i2c_get_bus_num(void);
+unsigned int i2c_get_bus_num(void);
 
 /*
  * i2c_set_bus_speed:
  *
  *  Change the speed of the active I2C bus
  *
- *     speed - bus speed in Hz
+ *     speed - bus speed in Hz
  *
- *     Returns: 0 on success, not 0 on failure
+ *     Returns: 0 on success, not 0 on failure
  *
  */
-int            i2c_set_bus_speed(int);
+int i2c_set_bus_speed(unsigned int);
 
 /*
  * i2c_get_bus_speed:
@@ -125,6 +230,6 @@ int         i2c_set_bus_speed(int);
  *  Returns speed of currently active I2C bus in Hz
  */
 
-int            i2c_get_bus_speed(void);
+unsigned int i2c_get_bus_speed(void);
 
 #endif /* _I2C_H_ */