diff options
Diffstat (limited to 'cpu/ppc4xx')
| -rw-r--r-- | cpu/ppc4xx/4xx_pci.c | 25 | ||||
| -rw-r--r-- | cpu/ppc4xx/cpu_init.c | 5 |
2 files changed, 23 insertions, 7 deletions
diff --git a/cpu/ppc4xx/4xx_pci.c b/cpu/ppc4xx/4xx_pci.c index 31ca85dc55..4b5d636bd1 100644 --- a/cpu/ppc4xx/4xx_pci.c +++ b/cpu/ppc4xx/4xx_pci.c @@ -87,6 +87,20 @@ DECLARE_GLOBAL_DATA_PTR; */ int __pci_pre_init(struct pci_controller *hose) { +#if defined (CONFIG_405EP) + /* + * Enable the internal PCI arbiter by default. + * + * On 405EP CPUs the internal arbiter can be controlled + * by the I2C strapping EEPROM. If you want to do so + * or if you want to disable the arbiter pci_pre_init() + * must be reimplemented without enabling the arbiter. + * The arbiter is enabled in this place because of + * compatibility reasons. + */ + mtdcr(cpc0_pci, mfdcr(cpc0_pci) | CPC0_PCI_ARBIT_EN); +#endif /* CONFIG_405EP */ + return 1; } int pci_pre_init(struct pci_controller *hose) __attribute__((weak, alias("__pci_pre_init"))); @@ -323,8 +337,15 @@ void pci_405gp_init(struct pci_controller *hose) } #endif -#if defined(CONFIG_405EP) /* on ppc405ep vendor id is not set */ - pci_write_config_word(PCIDEVID_405GP, PCI_VENDOR_ID, 0x1014); /* IBM */ +#if defined(CONFIG_405EP) + /* + * on ppc405ep vendor/device id is not set + * The user manual says 0x1014 (IBM) / 0x0156 (405GP!) + * are the correct values. + */ + pci_write_config_word(PCIDEVID_405GP, PCI_VENDOR_ID, PCI_VENDOR_ID_IBM); + pci_write_config_word(PCIDEVID_405GP, + PCI_DEVICE_ID, PCI_DEVICE_ID_IBM_405GP); #endif /* diff --git a/cpu/ppc4xx/cpu_init.c b/cpu/ppc4xx/cpu_init.c index 577d33fead..bbd795de2a 100644 --- a/cpu/ppc4xx/cpu_init.c +++ b/cpu/ppc4xx/cpu_init.c @@ -174,11 +174,6 @@ cpu_init_f (void) * Set EMAC noise filter bits */ mtdcr(cpc0_epctl, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE); - - /* - * Enable the internal PCI arbiter - */ - mtdcr(cpc0_pci, mfdcr(cpc0_pci) | CPC0_PCI_HOST_CFG_EN | CPC0_PCI_ARBIT_EN); #endif /* CONFIG_405EP */ #if defined(CONFIG_SYS_4xx_GPIO_TABLE) |
