/*
+ * (C) Copyright 2009
+ * Changes for multibus/multiadapter I2C support.
+ *
* (C) Copyright 2001, 2002
*
#include <ioports.h>
#include <asm/io.h>
#endif
-#ifdef CONFIG_AT91RM9200 /* need this for the at91rm9200 */
+#if defined(CONFIG_AVR32)
+#include <asm/arch/portmux.h>
+#endif
+#if defined(CONFIG_AT91FAMILY)
#include <asm/io.h>
#include <asm/arch/hardware.h>
-#endif
-#ifdef CONFIG_AT91SAM9263 /* only valid for AT91SAM9263 */
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_pio.h>
+#ifdef CONFIG_AT91_LEGACY
#include <asm/arch/gpio.h>
-#include <asm/arch/io.h>
+#endif
#endif
#ifdef CONFIG_IXP425 /* only valid for IXP425 */
#include <asm/arch/ixp425.h>
#endif
-#ifdef CONFIG_LPC2292
-#include <asm/arch/hardware.h>
-#endif
#if defined(CONFIG_MPC852T) || defined(CONFIG_MPC866)
#include <asm/io.h>
#endif
#include <i2c.h>
+#if defined(CONFIG_SOFT_I2C_GPIO_SCL)
+# include <asm/gpio.h>
+
+# ifndef I2C_GPIO_SYNC
+# define I2C_GPIO_SYNC
+# endif
+
+# ifndef I2C_INIT
+# define I2C_INIT \
+ do { \
+ gpio_request(CONFIG_SOFT_I2C_GPIO_SCL, "soft_i2c"); \
+ gpio_request(CONFIG_SOFT_I2C_GPIO_SDA, "soft_i2c"); \
+ } while (0)
+# endif
+
+# ifndef I2C_ACTIVE
+# define I2C_ACTIVE do { } while (0)
+# endif
+
+# ifndef I2C_TRISTATE
+# define I2C_TRISTATE do { } while (0)
+# endif
+
+# ifndef I2C_READ
+# define I2C_READ gpio_get_value(CONFIG_SOFT_I2C_GPIO_SDA)
+# endif
+
+# ifndef I2C_SDA
+# define I2C_SDA(bit) \
+ do { \
+ if (bit) \
+ gpio_direction_input(CONFIG_SOFT_I2C_GPIO_SDA); \
+ else \
+ gpio_direction_output(CONFIG_SOFT_I2C_GPIO_SDA, 0); \
+ I2C_GPIO_SYNC; \
+ } while (0)
+# endif
+
+# ifndef I2C_SCL
+# define I2C_SCL(bit) \
+ do { \
+ gpio_direction_output(CONFIG_SOFT_I2C_GPIO_SCL, bit); \
+ I2C_GPIO_SYNC; \
+ } while (0)
+# endif
+
+# ifndef I2C_DELAY
+# define I2C_DELAY udelay(5) /* 1/4 I2C clock duration */
+# endif
+
+#endif
+
/* #define DEBUG_I2C */
-#ifdef DEBUG_I2C
DECLARE_GLOBAL_DATA_PTR;
+
+#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
+
+#if !defined(CONFIG_SYS_SOFT_I2C_SPEED)
+#define CONFIG_SYS_SOFT_I2C_SPEED CONFIG_SYS_I2C_SPEED
+#endif
+#if !defined(CONFIG_SYS_SOFT_I2C_SLAVE)
+#define CONFIG_SYS_SOFT_I2C_SLAVE CONFIG_SYS_I2C_SLAVE
#endif
/*-----------------------------------------------------------------------
* Definitions
*/
-
#define RETRIES 0
#define I2C_ACK 0 /* PD_SDA level to ack a byte */
#ifdef DEBUG_I2C
#define PRINTD(fmt,args...) do { \
- if (gd->have_console) \
printf (fmt ,##args); \
} while (0)
#else
#define PRINTD(fmt,args...)
#endif
-#if defined(CONFIG_I2C_MULTI_BUS)
-static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = 0;
-#endif /* CONFIG_I2C_MULTI_BUS */
-
/*-----------------------------------------------------------------------
* Local functions
*/
return(nack); /* not a nack is an ack */
}
-#if defined(CONFIG_I2C_MULTI_BUS)
-/*
- * Functions for multiple I2C bus handling
- */
-unsigned int i2c_get_bus_num(void)
-{
- return i2c_bus_num;
-}
-
-int i2c_set_bus_num(unsigned int bus)
-{
-#if defined(CONFIG_I2C_MUX)
- if (bus < CONFIG_SYS_MAX_I2C_BUS) {
- i2c_bus_num = bus;
- } else {
- int ret;
-
- ret = i2x_mux_select_mux(bus);
- if (ret == 0)
- i2c_bus_num = bus;
- else
- return ret;
- }
-#else
- if (bus >= CONFIG_SYS_MAX_I2C_BUS)
- return -1;
- i2c_bus_num = bus;
-#endif
- return 0;
-}
-#endif
-
/*-----------------------------------------------------------------------
* if ack == I2C_ACK, ACK the byte so can continue reading, else
* send I2C_NOACK to end the read.
return(data);
}
-/*=====================================================================*/
-/* Public Functions */
-/*=====================================================================*/
-
/*-----------------------------------------------------------------------
* Initialization
*/
-void i2c_init (int speed, int slaveaddr)
+static void soft_i2c_init(struct i2c_adapter *adap, int speed, int slaveaddr)
{
#if defined(CONFIG_SYS_I2C_INIT_BOARD)
/* call board specific i2c bus reset routine before accessing the */
* completion of EEPROM writes since the chip stops responding until
* the write completes (typically 10mSec).
*/
-int i2c_probe(uchar addr)
+static int soft_i2c_probe(struct i2c_adapter *adap, uint8_t addr)
{
int rc;
/*-----------------------------------------------------------------------
* Read bytes
*/
-int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
+static int soft_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
+ int alen, uchar *buffer, int len)
{
int shift;
PRINTD("i2c_read: chip %02X addr %02X alen %d buffer %p len %d\n",
/*-----------------------------------------------------------------------
* Write bytes
*/
-int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
+static int soft_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
+ int alen, uchar *buffer, int len)
{
int shift, failures = 0;
send_stop();
return(failures);
}
+
+/*
+ * Register soft i2c adapters
+ */
+U_BOOT_I2C_ADAP_COMPLETE(soft0, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED, CONFIG_SYS_I2C_SOFT_SLAVE,
+ 0)
+#if defined(I2C_SOFT_DECLARATIONS2)
+U_BOOT_I2C_ADAP_COMPLETE(soft1, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_2,
+ CONFIG_SYS_I2C_SOFT_SLAVE_2,
+ 1)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS3)
+U_BOOT_I2C_ADAP_COMPLETE(soft2, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_3,
+ CONFIG_SYS_I2C_SOFT_SLAVE_3,
+ 2)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS4)
+U_BOOT_I2C_ADAP_COMPLETE(soft3, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_4,
+ CONFIG_SYS_I2C_SOFT_SLAVE_4,
+ 3)
+#endif
projects / J-u-boot.git / blobdiff