imported Ka-Ro specific additions to U-Boot 2009.08 for TX28

[karo-tx-uboot.git] / cpu / mpc8260 / i2c.c

diff --git a/cpu/mpc8260/i2c.c b/cpu/mpc8260/i2c.c
index 34bd3897f6d8fe302614dd002426345d37bac081..d2bdcc2d827f99e1560a334f996a9f1f860c79ba 100755 (executable)
--- a/cpu/mpc8260/i2c.c
+++ b/cpu/mpc8260/i2c.c
@@ -36,6 +36,10 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = 0;
+#endif /* CONFIG_I2C_MULTI_BUS */
+
 /* uSec to wait between polls of the i2c */
 #define DELAY_US       100
 /* uSec to wait for the CPM to start processing the buffer */
@@ -50,13 +54,10 @@ DECLARE_GLOBAL_DATA_PTR;
 /*-----------------------------------------------------------------------
  * Set default values
  */
-#ifndef        CFG_I2C_SPEED
-#define        CFG_I2C_SPEED   50000
+#ifndef        CONFIG_SYS_I2C_SPEED
+#define        CONFIG_SYS_I2C_SPEED    50000
 #endif
 
-#ifndef        CFG_I2C_SLAVE
-#define        CFG_I2C_SLAVE   0xFE
-#endif
 /*-----------------------------------------------------------------------
  */
 
@@ -172,7 +173,7 @@ i2c_roundrate(int hz, int speed, int filter, int modval,
  */
 static int i2c_setrate(int hz, int speed)
 {
-    immap_t    *immap = (immap_t *)CFG_IMMR ;
+    immap_t    *immap = (immap_t *)CONFIG_SYS_IMMR ;
     volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
     int brgval,
          modval,       /* 0-3 */
@@ -191,10 +192,10 @@ static int i2c_setrate(int hz, int speed)
 
                        if ((diff >= 0) && (diff < bestspeed_diff))
                        {
-                               bestspeed_diff  = diff ;
-                               bestspeed_modval        = modval;
-                               bestspeed_brgval        = brgval;
-                               bestspeed_filter        = filter;
+                               bestspeed_diff  = diff ;
+                               bestspeed_modval        = modval;
+                               bestspeed_brgval        = brgval;
+                               bestspeed_filter        = filter;
                        }
                }
        }
@@ -215,7 +216,7 @@ static int i2c_setrate(int hz, int speed)
 
 void i2c_init(int speed, int slaveadd)
 {
-       volatile immap_t *immap = (immap_t *)CFG_IMMR ;
+       volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
        volatile cpm8260_t *cp = (cpm8260_t *)&immap->im_cpm;
        volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
        volatile iic_t *iip;
@@ -223,7 +224,7 @@ void i2c_init(int speed, int slaveadd)
        volatile I2C_BD *rxbd, *txbd;
        uint dpaddr;
 
-#ifdef CFG_I2C_INIT_BOARD
+#ifdef CONFIG_SYS_I2C_INIT_BOARD
        /* call board specific i2c bus reset routine before accessing the   */
        /* environment, which might be in a chip on that bus. For details   */
        /* about this problem see doc/I2C_Edge_Conditions.                  */
@@ -242,7 +243,7 @@ void i2c_init(int speed, int slaveadd)
        /*
         * initialise data in dual port ram:
         *
-        *        dpaddr -> parameter ram (64 bytes)
+        *        dpaddr -> parameter ram (64 bytes)
         *         rbase -> rx BD         (NUM_RX_BDS * sizeof(I2C_BD) bytes)
         *         tbase -> tx BD         (NUM_TX_BDS * sizeof(I2C_BD) bytes)
         *                  tx buffer     (MAX_TX_SPACE bytes)
@@ -266,7 +267,7 @@ void i2c_init(int speed, int slaveadd)
         * divide BRGCLK by 1)
         */
        PRINTD(("[I2C] Setting rate...\n"));
-       i2c_setrate (gd->brg_clk, CFG_I2C_SPEED) ;
+       i2c_setrate (gd->brg_clk, CONFIG_SYS_I2C_SPEED) ;
 
        /* Set I2C controller in master mode */
        i2c->i2c_i2com = 0x01;
@@ -305,7 +306,7 @@ void i2c_init(int speed, int slaveadd)
 static
 void i2c_newio(i2c_state_t *state)
 {
-       volatile immap_t *immap = (immap_t *)CFG_IMMR ;
+       volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
        volatile iic_t *iip;
        uint dpaddr;
 
@@ -490,7 +491,7 @@ int i2c_receive(i2c_state_t *state,
 static
 int i2c_doio(i2c_state_t *state)
 {
-       volatile immap_t *immap = (immap_t *)CFG_IMMR ;
+       volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
        volatile iic_t *iip;
        volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
        volatile I2C_BD *txbd, *rxbd;
@@ -663,7 +664,7 @@ i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
        xaddr[2] = (addr >>  8) & 0xFF;
        xaddr[3] =  addr        & 0xFF;
 
-#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW
+#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
         /*
          * EEPROM chips that implement "address overflow" are ones
          * like Catalyst 24WC04/08/16 which has 9/10/11 bits of address
@@ -675,7 +676,7 @@ i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
          * be one byte because the extra address bits are hidden in the
          * chip address.
          */
-       chip |= ((addr >> (alen * 8)) & CFG_I2C_EEPROM_ADDR_OVERFLOW);
+       chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
 #endif
 
        i2c_newio(&state);
@@ -712,7 +713,7 @@ i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
        xaddr[2] = (addr >>  8) & 0xFF;
        xaddr[3] =  addr        & 0xFF;
 
-#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW
+#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
         /*
          * EEPROM chips that implement "address overflow" are ones
          * like Catalyst 24WC04/08/16 which has 9/10/11 bits of address
@@ -724,7 +725,7 @@ i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
          * be one byte because the extra address bits are hidden in the
          * chip address.
          */
-       chip |= ((addr >> (alen * 8)) & CFG_I2C_EEPROM_ADDR_OVERFLOW);
+       chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
 #endif
 
        i2c_newio(&state);
@@ -749,20 +750,36 @@ i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
        return 0;
 }
 
-uchar
-i2c_reg_read(uchar chip, uchar reg)
+#if defined(CONFIG_I2C_MULTI_BUS)
+/*
+ * Functions for multiple I2C bus handling
+ */
+unsigned int i2c_get_bus_num(void)
 {
-       uchar buf;
-
-       i2c_read(chip, reg, 1, &buf, 1);
-
-       return (buf);
+       return i2c_bus_num;
 }
 
-void
-i2c_reg_write(uchar chip, uchar reg, uchar val)
+int i2c_set_bus_num(unsigned int bus)
 {
-       i2c_write(chip, reg, 1, &val, 1);
+#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 /* CONFIG_I2C_MULTI_BUS */
 #endif /* CONFIG_HARD_I2C */