diff options
Diffstat (limited to 'cpu/ppc4xx/4xx_pci.c')
| -rw-r--r-- | cpu/ppc4xx/4xx_pci.c | 125 |
1 files changed, 103 insertions, 22 deletions
diff --git a/cpu/ppc4xx/4xx_pci.c b/cpu/ppc4xx/4xx_pci.c index 20e134b..01b9cf7 100644 --- a/cpu/ppc4xx/4xx_pci.c +++ b/cpu/ppc4xx/4xx_pci.c @@ -73,9 +73,7 @@ #include <common.h> #include <command.h> -#if !defined(CONFIG_440) #include <asm/4xx_pci.h> -#endif #include <asm/processor.h> #include <asm/io.h> #include <pci.h> @@ -84,13 +82,21 @@ DECLARE_GLOBAL_DATA_PTR; +#if defined(CONFIG_405GP) || defined(CONFIG_405EP) + +#if defined(CONFIG_PMC405) +ushort pmc405_pci_subsys_deviceid(void); +#endif + +/*#define DEBUG*/ + /* * Board-specific pci initialization * Platform code can reimplement pci_pre_init() if needed */ int __pci_pre_init(struct pci_controller *hose) { -#if defined (CONFIG_405EP) +#if defined(CONFIG_405EP) /* * Enable the internal PCI arbiter by default. * @@ -106,15 +112,8 @@ int __pci_pre_init(struct pci_controller *hose) return 1; } -int pci_pre_init(struct pci_controller *hose) __attribute__((weak, alias("__pci_pre_init"))); - -#if defined(CONFIG_405GP) || defined(CONFIG_405EP) - -#if defined(CONFIG_PMC405) -ushort pmc405_pci_subsys_deviceid(void); -#endif - -/*#define DEBUG*/ +int pci_pre_init(struct pci_controller *hose) + __attribute__((weak, alias("__pci_pre_init"))); int __is_pci_host(struct pci_controller *hose) { @@ -232,7 +231,7 @@ void pci_405gp_init(struct pci_controller *hose) pciauto_region_init(hose->pci_fb); /* Let board change/modify hose & do initial checks */ - if (pci_pre_init (hose) == 0) { + if (pci_pre_init(hose) == 0) { printf("PCI: Board-specific initialization failed.\n"); printf("PCI: Configuration aborted.\n"); return; @@ -500,16 +499,17 @@ int __is_pci_host(struct pci_controller *hose) int is_pci_host(struct pci_controller *hose) __attribute__((weak, alias("__is_pci_host"))); +#if defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \ + defined(CONFIG_440GR) || defined(CONFIG_440GRX) + +#if defined(CONFIG_SYS_PCI_TARGET_INIT) /* - * pci_target_init + * pci_target_init * - * The bootstrap configuration provides default settings for the pci - * inbound map (PIM). But the bootstrap config choices are limited and - * may not be sufficient for a given board. + * The bootstrap configuration provides default settings for the pci + * inbound map (PIM). But the bootstrap config choices are limited and + * may not be sufficient for a given board. */ -#if defined(CONFIG_SYS_PCI_TARGET_INIT) -#if defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \ - defined(CONFIG_440GR) || defined(CONFIG_440GRX) void __pci_target_init(struct pci_controller *hose) { /* @@ -570,7 +570,68 @@ void __pci_target_init(struct pci_controller *hose) pci_write_config_dword(0, PCI_BRDGOPT2, 0x00000101); } +#endif /* CONFIG_SYS_PCI_TARGET_INIT */ + +/* + * pci_pre_init + * + * This routine is called just prior to registering the hose and gives + * the board the opportunity to check things. Returning a value of zero + * indicates that things are bad & PCI initialization should be aborted. + * + * Different boards may wish to customize the pci controller structure + * (add regions, override default access routines, etc) or perform + * certain pre-initialization actions. + * + */ +int __pci_pre_init(struct pci_controller *hose) +{ + u32 reg; + + /* + * Set priority for all PLB3 devices to 0. + * Set PLB3 arbiter to fair mode. + */ + mfsdr(SD0_AMP1, reg); + mtsdr(SD0_AMP1, (reg & 0x000000FF) | 0x0000FF00); + reg = mfdcr(PLB3_ACR); + mtdcr(PLB3_ACR, reg | 0x80000000); + + /* + * Set priority for all PLB4 devices to 0. + */ + mfsdr(SD0_AMP0, reg); + mtsdr(SD0_AMP0, (reg & 0x000000FF) | 0x0000FF00); + reg = mfdcr(PLB4_ACR) | 0xa0000000; + mtdcr(PLB4_ACR, reg); + + /* + * Set Nebula PLB4 arbiter to fair mode. + */ + /* Segment0 */ + reg = (mfdcr(PLB0_ACR) & ~PLB0_ACR_PPM_MASK) | PLB0_ACR_PPM_FAIR; + reg = (reg & ~PLB0_ACR_HBU_MASK) | PLB0_ACR_HBU_ENABLED; + reg = (reg & ~PLB0_ACR_RDP_MASK) | PLB0_ACR_RDP_4DEEP; + reg = (reg & ~PLB0_ACR_WRP_MASK) | PLB0_ACR_WRP_2DEEP; + mtdcr(PLB0_ACR, reg); + + /* Segment1 */ + reg = (mfdcr(PLB1_ACR) & ~PLB1_ACR_PPM_MASK) | PLB1_ACR_PPM_FAIR; + reg = (reg & ~PLB1_ACR_HBU_MASK) | PLB1_ACR_HBU_ENABLED; + reg = (reg & ~PLB1_ACR_RDP_MASK) | PLB1_ACR_RDP_4DEEP; + reg = (reg & ~PLB1_ACR_WRP_MASK) | PLB1_ACR_WRP_2DEEP; + mtdcr(PLB1_ACR, reg); + +#if defined(CONFIG_SYS_PCI_BOARD_FIXUP_IRQ) + hose->fixup_irq = board_pci_fixup_irq; +#endif + + return 1; +} + #else /* defined(CONFIG_440EP) ... */ + +#if defined(CONFIG_SYS_PCI_TARGET_INIT) void __pci_target_init(struct pci_controller * hose) { /* @@ -599,11 +660,31 @@ void __pci_target_init(struct pci_controller * hose) out_le16((void *)PCIL0_CMD, in_le16((void *)PCIL0_CMD) | PCI_COMMAND_MEMORY); } +#endif /* CONFIG_SYS_PCI_TARGET_INIT */ + +int __pci_pre_init(struct pci_controller *hose) +{ + /* + * This board is always configured as the host & requires the + * PCI arbiter to be enabled. + */ + if (!pci_arbiter_enabled()) { + printf("PCI: PCI Arbiter disabled!\n"); + return 0; + } + + return 1; +} + #endif /* defined(CONFIG_440EP) ... */ + +#if defined(CONFIG_SYS_PCI_TARGET_INIT) void pci_target_init(struct pci_controller * hose) __attribute__((weak, alias("__pci_target_init"))); +#endif /* CONFIG_SYS_PCI_TARGET_INIT */ -#endif /* defined(CONFIG_SYS_PCI_TARGET_INIT) */ +int pci_pre_init(struct pci_controller *hose) + __attribute__((weak, alias("__pci_pre_init"))); int pci_440_init (struct pci_controller *hose) { @@ -674,7 +755,7 @@ int pci_440_init (struct pci_controller *hose) pci_setup_indirect(hose, PCIL0_CFGADR, PCIL0_CFGDATA); /* Let board change/modify hose & do initial checks */ - if (pci_pre_init (hose) == 0) { + if (pci_pre_init(hose) == 0) { printf("PCI: Board-specific initialization failed.\n"); printf("PCI: Configuration aborted.\n"); return -1; |