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authorJohn Otken <john@softadvances.com>2007-07-26 17:49:11 +0200
committerStefan Roese <sr@denx.de>2007-07-26 17:49:11 +0200
commitd4024bb72dd81695ec099b2199eda0d27c623e62 (patch)
tree401db21bb0c6665bb10ef70ece49a1479836483d /cpu/ppc4xx/start.S
parent9f24a808f17fc0f37b7fb4805f734741335caecc (diff)
ppc4xx: Add support for AMCC 405EP Taihu board
Signed-off-by: John Otken <john@softadvances.com>
Diffstat (limited to 'cpu/ppc4xx/start.S')
-rw-r--r--cpu/ppc4xx/start.S33
1 files changed, 33 insertions, 0 deletions
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 8ecaaea4d9..18d3445609 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -1869,6 +1869,11 @@ ppc405ep_init:
ori r3,r3,CFG_EBC_PB4CR@l
mtdcr ebccfgd,r3
#endif
+#ifdef CONFIG_TAIHU
+ mfdcr r4, CPC0_BOOT
+ andi. r5, r4, CPC0_BOOT_SEP@l
+ bne strap_0 /* serial eeprom present */
+#endif
#ifndef CFG_CPC0_PCI
li r3,CPC0_PCI_HOST_CFG_EN
@@ -1886,12 +1891,16 @@ ppc405ep_init:
beq ..pci_cfg_set /* if not set, then bypass reg write*/
#endif
ori r3,r3,CPC0_PCI_ARBIT_EN
+#ifdef CONFIG_TAIHU
+ ori r3,r3,CPC0_PCI_SPE
+#endif
#else /* CFG_CPC0_PCI */
li r3,CFG_CPC0_PCI
#endif /* CFG_CPC0_PCI */
..pci_cfg_set:
mtdcr CPC0_PCI, r3 /* Enable internal arbiter*/
+strap_0:
/*
!-----------------------------------------------------------------------
! Check to see if chip is in bypass mode.
@@ -1947,11 +1956,35 @@ ppc405ep_init:
..no_pllset:
#endif /* CONFIG_BUBINGA */
+#ifdef CONFIG_TAIHU
+ mfdcr r4, CPC0_BOOT
+ andi. r5, r4, CPC0_BOOT_SEP@l
+ bne strap_1 /* serial eeprom present */
+ addis r5,0,CPLD_REG0_ADDR@h
+ ori r5,r5,CPLD_REG0_ADDR@l
+ andi. r5, r5, 0x10
+ bne _pci_66mhz
+#endif /* CONFIG_TAIHU */
+
addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
ori r3,r3,PLLMR0_DEFAULT@l /* */
addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
ori r4,r4,PLLMR1_DEFAULT@l /* */
+#ifdef CONFIG_TAIHU
+ b 1f
+_pci_66mhz:
+ addis r3,0,PLLMR0_DEFAULT_PCI66@h
+ ori r3,r3,PLLMR0_DEFAULT_PCI66@l
+ addis r4,0,PLLMR1_DEFAULT_PCI66@h
+ ori r4,r4,PLLMR1_DEFAULT_PCI66@l
+ b 1f
+strap_1:
+ mfdcr r3, CPC0_PLLMR0
+ mfdcr r4, CPC0_PLLMR1
+1:
+#endif /* CONFIG_TAIHU */
+
b pll_write /* Write the CPC0_PLLMR with new value */
pll_done: