#define i2c_get_ops(dev) ((struct dm_i2c_ops *)(dev)->driver->ops)
+/**
+ * struct i2c_mux_ops - operations for an I2C mux
+ *
+ * The current mux state is expected to be stored in the mux itself since
+ * it is the only thing that knows how to make things work. The mux can
+ * record the current state and then avoid switching unless it is necessary.
+ * So select() can be skipped if the mux is already in the correct state.
+ * Also deselect() can be made a nop if required.
+ */
+struct i2c_mux_ops {
+ /**
+ * select() - select one of of I2C buses attached to a mux
+ *
+ * This will be called when there is no bus currently selected by the
+ * mux. This method does not need to deselect the old bus since
+ * deselect() will be already have been called if necessary.
+ *
+ * @mux: Mux device
+ * @bus: I2C bus to select
+ * @channel: Channel number correponding to the bus to select
+ * @return 0 if OK, -ve on error
+ */
+ int (*select)(struct udevice *mux, struct udevice *bus, uint channel);
+
+ /**
+ * deselect() - select one of of I2C buses attached to a mux
+ *
+ * This is used to deselect the currently selected I2C bus.
+ *
+ * @mux: Mux device
+ * @bus: I2C bus to deselect
+ * @channel: Channel number correponding to the bus to deselect
+ * @return 0 if OK, -ve on error
+ */
+ int (*deselect)(struct udevice *mux, struct udevice *bus, uint channel);
+};
+
+#define i2c_mux_get_ops(dev) ((struct i2c_mux_ops *)(dev)->driver->ops)
+
/**
* i2c_get_chip() - get a device to use to access a chip on a bus
*
struct udevice **devp);
/**
- * i2c_get_chip() - get a device to use to access a chip on a bus number
+ * i2c_get_chip_for_busnum() - get a device to use to access a chip on
+ * a bus number
*
* This returns the device for the given chip address on a particular bus
* number.
* @node: Node offset to read from
* @spi: Place to put the decoded information
*/
-int i2c_chip_ofdata_to_platdata(const void *blob, int node,
- struct dm_i2c_chip *chip);
+int i2c_chip_ofdata_to_platdata(struct udevice *dev, struct dm_i2c_chip *chip);
/**
* i2c_dump_msgs() - Dump a list of I2C messages
#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
#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) || \
+# if (defined(CONFIG_AT91RM9200) || \
defined(CONFIG_AT91SAM9260) || defined(CONFIG_AT91SAM9261) || \
defined(CONFIG_AT91SAM9263))
# define I2C_SOFT_DECLARATIONS at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA;
# 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
* Initialization, must be called once on start up, may be called
* repeatedly to change the speed and slave addresses.
*/
+#ifdef CONFIG_SYS_I2C_EARLY_INIT
+void i2c_early_init_f(void);
+#endif
void i2c_init(int speed, int slaveaddr);
void i2c_init_board(void);
-#ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT
-void i2c_board_late_init(void);
-#endif
#ifdef CONFIG_SYS_I2C
/*
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);
-#if defined(CONFIG_SYS_I2C_SOFT)
-void i2c_soft_init(void);
-void i2c_soft_active(void);
-void i2c_soft_tristate(void);
-int i2c_soft_read(void);
-void i2c_soft_sda(int bit);
-void i2c_soft_scl(int bit);
-void i2c_soft_delay(void);
-#endif
#else
/*
{
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
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);
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.
*
projects / people / ms / u-boot.git / blobdiff