imported Freescale specific U-Boot additions for i.MX28,... release L2.6.31_10.08.01

[karo-tx-uboot.git] / cpu / 74xx_7xx / speed.c

diff --git a/cpu/74xx_7xx/speed.c b/cpu/74xx_7xx/speed.c
index 2dc510746d69e2c678b45c6536143623138a8901..f2fdcd5dc3dbe352e03728cf0fade7fb184a667b 100755 (executable)
--- a/cpu/74xx_7xx/speed.c
+++ b/cpu/74xx_7xx/speed.c
@@ -31,6 +31,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+extern unsigned long get_board_bus_clk (void);
+
 static const int hid1_multipliers_x_10[] = {
        25,     /* 0000 - 2.5x */
        75,     /* 0001 - 7.5x */
@@ -50,6 +52,42 @@ static const int hid1_multipliers_x_10[] = {
        0       /* 1111 - off */
 };
 
+/* PLL_CFG[0:4] table for cpu 7448/7447A/7455/7457 */
+static const int hid1_74xx_multipliers_x_10[] = {
+       115,    /* 00000 - 11.5x  */
+       170,    /* 00001 - 17x    */
+       75,     /* 00010 -  7.5x  */
+       150,    /* 00011 - 15x    */
+       70,     /* 00100 -  7x    */
+       180,    /* 00101 - 18x    */
+       10,     /* 00110 - bypass */
+       200,    /* 00111 - 20x    */
+       20,     /* 01000 -  2x    */
+       210,    /* 01001 - 21x    */
+       65,     /* 01010 -  6.5x  */
+       130,    /* 01011 - 13x    */
+       85,     /* 01100 -  8.5x  */
+       240,    /* 01101 - 24x    */
+       95,     /* 01110 -  9.5x  */
+       90,     /* 01111 -  9x    */
+       30,     /* 10000 -  3x    */
+       105,    /* 10001 - 10.5x  */
+       55,     /* 10010 -  5.5x  */
+       110,    /* 10011 - 11x    */
+       40,     /* 10100 -  4x    */
+       100,    /* 10101 - 10x    */
+       50,     /* 10110 -  5x    */
+       120,    /* 10111 - 12x    */
+       80,     /* 11000 -  8x    */
+       140,    /* 11001 - 14x    */
+       60,     /* 11010 -  6x    */
+       160,    /* 11011 - 16x    */
+       135,    /* 11100 - 13.5x  */
+       280,    /* 11101 - 28x    */
+       0,      /* 11110 - off    */
+       125     /* 11111 - 12.5x  */
+};
+
 static const int hid1_fx_multipliers_x_10[] = {
        00,     /* 0000 - off */
        00,     /* 0001 - off */
@@ -89,21 +127,30 @@ int get_clocks (void)
 {
        ulong clock = 0;
 
+#ifdef CONFIG_SYS_BUS_CLK
+       gd->bus_clk = CONFIG_SYS_BUS_CLK;       /* bus clock is a fixed frequency */
+#else
+       gd->bus_clk = get_board_bus_clk ();     /* bus clock is configurable */
+#endif
+
        /* calculate the clock frequency based upon the CPU type */
        switch (get_cpu_type()) {
+       case CPU_7447A:
+       case CPU_7448:
        case CPU_7455:
        case CPU_7457:
                /*
-                * It is assumed that the PLL_EXT line is zero.
                 * Make sure division is done before multiplication to prevent 32-bit
                 * arithmetic overflows which will cause a negative number
                 */
-               clock = (CFG_BUS_CLK / 10) * hid1_multipliers_x_10[(get_hid1 () >> 13) & 0xF];
+               clock = (gd->bus_clk / 10) *
+                       hid1_74xx_multipliers_x_10[(get_hid1 () >> 12) & 0x1F];
                break;
 
        case CPU_750GX:
        case CPU_750FX:
-               clock = CFG_BUS_CLK * hid1_fx_multipliers_x_10[get_hid1 () >> 27] / 10;
+               clock = (gd->bus_clk / 10) *
+                       hid1_fx_multipliers_x_10[get_hid1 () >> 27];
                break;
 
        case CPU_7450:
@@ -120,7 +167,8 @@ int get_clocks (void)
                 * Make sure division is done before multiplication to prevent 32-bit
                 * arithmetic overflows which will cause a negative number
                 */
-               clock = (CFG_BUS_CLK / 10) * hid1_multipliers_x_10[get_hid1 () >> 28];
+               clock = (gd->bus_clk / 10) *
+                       hid1_multipliers_x_10[get_hid1 () >> 28];
                break;
 
        case CPU_UNKNOWN:
@@ -130,7 +178,6 @@ int get_clocks (void)
        }
 
        gd->cpu_clk = clock;
-       gd->bus_clk = CFG_BUS_CLK;
 
        return (0);
 }