summaryrefslogtreecommitdiff
path: root/cpu/mpc8220/speed.c
diff options
context:
space:
mode:
Diffstat (limited to 'cpu/mpc8220/speed.c')
-rw-r--r--cpu/mpc8220/speed.c58
1 files changed, 30 insertions, 28 deletions
diff --git a/cpu/mpc8220/speed.c b/cpu/mpc8220/speed.c
index bd79911..0c3df7c 100644
--- a/cpu/mpc8220/speed.c
+++ b/cpu/mpc8220/speed.c
@@ -42,30 +42,30 @@ int get_clocks (void)
DECLARE_GLOBAL_DATA_PTR;
pllcfg_t bus2core[] = {
- {0x10, 2, 8}, /* 1 */
- {0x08, 2, 4},
- {0x60, 3, 8}, /* 1.5 */
+ {0x02, 2, 8}, /* 1 */
+ {0x01, 2, 4},
+ {0x0C, 3, 8}, /* 1.5 */
{0x00, 3, 4},
- {0xc0, 3, 2},
- {0x28, 4, 4}, /* 2 */
- {0x20, 4, 2},
- {0x88, 5, 4}, /* 2.5 */
- {0x30, 5, 2},
- {0x80, 6, 4}, /* 3 */
- {0x40, 6, 2},
- {0x70, 7, 2}, /* 3.5 */
- {0x50, 8, 2}, /* 4 */
- {0x38, 9, 2}, /* 4.5 */
- {0x58, 10, 2}, /* 5 */
- {0x48, 11, 2}, /* 5.5 */
- {0x68, 12, 2}, /* 6 */
- {0x90, 13, 2}, /* 6.5 */
- {0xa0, 14, 2}, /* 7 */
- {0xb0, 15, 2}, /* 7.5 */
- {0xe0, 16, 2} /* 8 */
+ {0x18, 3, 2},
+ {0x05, 4, 4}, /* 2 */
+ {0x04, 4, 2},
+ {0x11, 5, 4}, /* 2.5 */
+ {0x06, 5, 2},
+ {0x10, 6, 4}, /* 3 */
+ {0x08, 6, 2},
+ {0x0E, 7, 2}, /* 3.5 */
+ {0x0A, 8, 2}, /* 4 */
+ {0x07, 9, 2}, /* 4.5 */
+ {0x0B, 10, 2}, /* 5 */
+ {0x09, 11, 2}, /* 5.5 */
+ {0x0D, 12, 2}, /* 6 */
+ {0x12, 13, 2}, /* 6.5 */
+ {0x14, 14, 2}, /* 7 */
+ {0x16, 15, 2}, /* 7.5 */
+ {0x1C, 16, 2} /* 8 */
};
u32 hid1;
- int i, size;
+ int i, size, pci2bus;
#if !defined(CFG_MPC8220_CLKIN)
#error clock measuring not implemented yet - define CFG_MPC8220_CLKIN
@@ -73,9 +73,12 @@ int get_clocks (void)
gd->inp_clk = CFG_MPC8220_CLKIN;
- /* Bus clock is fixed at 120Mhz for now */
- /* will do dynamic in the future */
- gd->bus_clk = CFG_MPC8220_CLKIN * 4;
+ /* Read XLB to PCI(INP) clock multiplier */
+ pci2bus = (*((volatile u32 *)PCI_REG_PCIGSCR) &
+ PCI_REG_PCIGSCR_PCI2XLB_CLK_MASK)>>PCI_REG_PCIGSCR_PCI2XLB_CLK_BIT;
+
+ /* XLB bus clock */
+ gd->bus_clk = CFG_MPC8220_CLKIN * pci2bus;
/* PCI clock is same as input clock */
gd->pci_clk = CFG_MPC8220_CLKIN;
@@ -88,14 +91,13 @@ int get_clocks (void)
asm volatile ("mfspr %0, 1009":"=r" (hid1):);
size = sizeof (bus2core) / sizeof (pllcfg_t);
- hid1 >>= 24;
+
+ hid1 >>= 27;
for (i = 0; i < size; i++)
if (hid1 == bus2core[i].hid1) {
gd->cpu_clk = (bus2core[i].multi * gd->bus_clk) >> 1;
- /* Input Multiplier is determined by MPLL,
- hardcoded for now at 16 */
- gd->vco_clk = gd->pci_clk * 16;
+ gd->vco_clk = CFG_MPC8220_SYSPLL_VCO_MULTIPLIER * (gd->pci_clk * bus2core[i].vco_div)/2;
break;
}