*/
#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)
+#ifdef CONFIG_I2C_MULTI_BUS
+#define MAX_I2C_BUS 2
+#define I2C_MULTI_BUS 1
#else
-#define CFG_MAX_I2C_BUS 1
-#define I2C_GET_BUS() 0
-#define I2C_SET_BUS(a)
+#define MAX_I2C_BUS 1
+#define I2C_MULTI_BUS 0
+#endif
+
+#if !defined(CONFIG_SYS_MAX_I2C_BUS)
+#define CONFIG_SYS_MAX_I2C_BUS MAX_I2C_BUS
+#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;
+
+# elif (defined(CONFIG_AT91RM9200) || \
+ defined(CONFIG_AT91SAM9260) || defined(CONFIG_AT91SAM9261) || \
+ defined(CONFIG_AT91SAM9263)) && !defined(CONFIG_AT91_LEGACY)
+# define I2C_SOFT_DECLARATIONS at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
+# 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
/*
* 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);
+#ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT
+void i2c_board_late_init(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;
+
+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
/*
/*
* 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
* 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(unsigned int bus);
*
* 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(unsigned int);
unsigned int i2c_get_bus_speed(void);
+/* NOTE: These two functions MUST be always_inline to avoid code growth! */
+static inline unsigned int I2C_GET_BUS(void) __attribute__((always_inline));
+static inline unsigned int I2C_GET_BUS(void)
+{
+ return I2C_MULTI_BUS ? i2c_get_bus_num() : 0;
+}
+
+static inline void I2C_SET_BUS(unsigned int bus) __attribute__((always_inline));
+static inline void I2C_SET_BUS(unsigned int bus)
+{
+ if (I2C_MULTI_BUS)
+ i2c_set_bus_num(bus);
+}
+
+/* Multi I2C definitions */
+enum {
+ I2C_0, I2C_1, I2C_2, I2C_3, I2C_4, I2C_5, I2C_6, I2C_7,
+ I2C_8, I2C_9, I2C_10,
+};
+
+/* Multi I2C busses handling */
+#ifdef CONFIG_SOFT_I2C_MULTI_BUS
+extern int get_multi_scl_pin(void);
+extern int get_multi_sda_pin(void);
+extern int multi_i2c_init(void);
+#endif
+
+/**
+ * Get FDT values for i2c bus.
+ *
+ * @param blob Device tree blbo
+ * @return the number of I2C bus
+ */
+void board_i2c_init(const void *blob);
+
+/**
+ * Find the I2C bus number by given a FDT I2C node.
+ *
+ * @param blob Device tree blbo
+ * @param node FDT I2C node to find
+ * @return the number of I2C bus (zero based), or -1 on error
+ */
+int i2c_get_bus_num_fdt(int node);
+
+/**
+ * Reset the I2C bus represented by the given a FDT I2C node.
+ *
+ * @param blob Device tree blbo
+ * @param node FDT I2C node to find
+ * @return 0 if port was reset, -1 if not found
+ */
+int i2c_reset_port_fdt(const void *blob, int node);
#endif /* _I2C_H_ */
projects / karo-tx-uboot.git / blobdiff