Add command for handling DDR ECC registers on MPC8349EE MDS board.

[oweals/u-boot.git] / common / soft_i2c.c

diff --git a/common/soft_i2c.c b/common/soft_i2c.c
index 63574044ad0de900897c6d7d02a3a277a3f0886f..b3642dafc24564b44b151db1e4f0cffd50b3473e 100644 (file)
--- a/common/soft_i2c.c
+++ b/common/soft_i2c.c
@@ -29,6 +29,10 @@
 #ifdef CONFIG_MPC8260                  /* only valid for MPC8260 */
 #include <ioports.h>
 #endif
+#ifdef CONFIG_AT91RM9200DK             /* need this for the at91rm9200dk */
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#endif
 #include <i2c.h>
 
 #if defined(CONFIG_SOFT_I2C)
@@ -83,8 +87,12 @@ static void send_reset(void)
 #endif
        int j;
 
-       I2C_ACTIVE;
+       I2C_SCL(1);
        I2C_SDA(1);
+#ifdef I2C_INIT
+       I2C_INIT;
+#endif
+       I2C_TRISTATE;
        for(j = 0; j < 9; j++) {
                I2C_SCL(0);
                I2C_DELAY;
@@ -156,13 +164,10 @@ static void send_ack(int ack)
        volatile immap_t *immr = (immap_t *)CFG_IMMR;
 #endif
 
-       I2C_ACTIVE;
        I2C_SCL(0);
        I2C_DELAY;
-
-       I2C_SDA(ack);
-
        I2C_ACTIVE;
+       I2C_SDA(ack);
        I2C_DELAY;
        I2C_SCL(1);
        I2C_DELAY;
@@ -262,18 +267,11 @@ static uchar read_byte(int ack)
  */
 void i2c_init (int speed, int slaveaddr)
 {
-#ifdef CONFIG_8xx
-       volatile immap_t *immr = (immap_t *)CFG_IMMR;
-#endif
-
-#ifdef I2C_INIT
-       I2C_INIT;
-#endif
        /*
-         * WARNING: Do NOT save speed in a static variable: if the
-         * I2C routines are called before RAM is initialized (to read
-         * the DIMM SPD, for instance), RAM won't be usable and your
-         * system will crash.
+        * WARNING: Do NOT save speed in a static variable: if the
+        * I2C routines are called before RAM is initialized (to read
+        * the DIMM SPD, for instance), RAM won't be usable and your
+        * system will crash.
         */
        send_reset ();
 }
@@ -287,7 +285,10 @@ int i2c_probe(uchar addr)
 {
        int rc;
 
-       /* perform 1 byte read transaction */
+       /*
+        * perform 1 byte write transaction with just address byte
+        * (fake write)
+        */
        send_start();
        rc = write_byte ((addr << 1) | 0);
        send_stop();
@@ -398,7 +399,7 @@ int  i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
  */
 uchar i2c_reg_read(uchar i2c_addr, uchar reg)
 {
-       char buf;
+       uchar buf;
 
        i2c_read(i2c_addr, reg, 1, &buf, 1);