diff options
Diffstat (limited to 'cpu/mpc8220/speed.c')
| -rw-r--r-- | cpu/mpc8220/speed.c | 58 |
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; } |