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Diffstat (limited to 'cpu/ppc4xx/4xx_pci.c')
-rw-r--r--cpu/ppc4xx/4xx_pci.c253
1 files changed, 239 insertions, 14 deletions
diff --git a/cpu/ppc4xx/4xx_pci.c b/cpu/ppc4xx/4xx_pci.c
index fa521f0..eed4534 100644
--- a/cpu/ppc4xx/4xx_pci.c
+++ b/cpu/ppc4xx/4xx_pci.c
@@ -73,23 +73,30 @@
#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>
#ifdef CONFIG_PCI
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.
*
@@ -105,15 +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)
{
@@ -231,7 +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;
@@ -478,6 +478,231 @@ void pci_init_board(void)
static struct pci_controller ppc440_hose = {0};
+/*
+ * This routine is called to determine if a pci scan should be
+ * performed. With various hardware environments (especially cPCI and
+ * PPMC) it's insufficient to depend on the state of the arbiter enable
+ * bit in the strap register, or generic host/adapter assumptions.
+ *
+ * Rather than hard-code a bad assumption in the general 440 code, the
+ * 440 pci code requires the board to decide at runtime.
+ *
+ * Return 0 for adapter mode, non-zero for host (monarch) mode.
+ *
+ * Weak default implementation: "Normal" boards implement the PCI
+ * host functionality. This can be overridden for PCI adapter boards.
+ */
+int __is_pci_host(struct pci_controller *hose)
+{
+ return 1;
+}
+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
+ *
+ * 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.
+ */
+void __pci_target_init(struct pci_controller *hose)
+{
+ /*
+ * Set up Direct MMIO registers
+ */
+
+ /*
+ * PowerPC440 EP PCI Master configuration.
+ * Map one 1Gig range of PLB/processor addresses to PCI memory space.
+ * PLB address 0xA0000000-0xDFFFFFFF ==> PCI address 0xA0000000-0xDFFFFFFF
+ * Use byte reversed out routines to handle endianess.
+ * Make this region non-prefetchable.
+ */
+ /* PMM0 Mask/Attribute - disabled b4 setting */
+ out_le32((void *)PCIL0_PMM0MA, 0x00000000);
+ /* PMM0 Local Address */
+ out_le32((void *)PCIL0_PMM0LA, CONFIG_SYS_PCI_MEMBASE);
+ /* PMM0 PCI Low Address */
+ out_le32((void *)PCIL0_PMM0PCILA, CONFIG_SYS_PCI_MEMBASE);
+ /* PMM0 PCI High Address */
+ out_le32((void *)PCIL0_PMM0PCIHA, 0x00000000);
+ /* 512M + No prefetching, and enable region */
+ out_le32((void *)PCIL0_PMM0MA, 0xE0000001);
+
+ /* PMM1 Mask/Attribute - disabled b4 setting */
+ out_le32((void *)PCIL0_PMM1MA, 0x00000000);
+ /* PMM1 Local Address */
+ out_le32((void *)PCIL0_PMM1LA, CONFIG_SYS_PCI_MEMBASE2);
+ /* PMM1 PCI Low Address */
+ out_le32((void *)PCIL0_PMM1PCILA, CONFIG_SYS_PCI_MEMBASE2);
+ /* PMM1 PCI High Address */
+ out_le32((void *)PCIL0_PMM1PCIHA, 0x00000000);
+ /* 512M + No prefetching, and enable region */
+ out_le32((void *)PCIL0_PMM1MA, 0xE0000001);
+
+ out_le32((void *)PCIL0_PTM1MS, 0x00000001); /* Memory Size/Attribute */
+ out_le32((void *)PCIL0_PTM1LA, 0); /* Local Addr. Reg */
+ out_le32((void *)PCIL0_PTM2MS, 0); /* Memory Size/Attribute */
+ out_le32((void *)PCIL0_PTM2LA, 0); /* Local Addr. Reg */
+
+ /*
+ * Set up Configuration registers
+ */
+
+ /* Program the board's subsystem id/vendor id */
+ pci_write_config_word(0, PCI_SUBSYSTEM_VENDOR_ID,
+ CONFIG_SYS_PCI_SUBSYS_VENDORID);
+ pci_write_config_word(0, PCI_SUBSYSTEM_ID, CONFIG_SYS_PCI_SUBSYS_ID);
+
+ /* Configure command register as bus master */
+ pci_write_config_word(0, PCI_COMMAND, PCI_COMMAND_MASTER);
+
+ /* 240nS PCI clock */
+ pci_write_config_word(0, PCI_LATENCY_TIMER, 1);
+
+ /* No error reporting */
+ pci_write_config_word(0, PCI_ERREN, 0);
+
+ 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)
+{
+ /*
+ * Disable everything
+ */
+ out_le32((void *)PCIL0_PIM0SA, 0); /* disable */
+ out_le32((void *)PCIL0_PIM1SA, 0); /* disable */
+ out_le32((void *)PCIL0_PIM2SA, 0); /* disable */
+ out_le32((void *)PCIL0_EROMBA, 0); /* disable expansion rom */
+
+ /*
+ * Map all of SDRAM to PCI address 0x0000_0000. Note that the 440
+ * strapping options do not support sizes such as 128/256 MB.
+ */
+ out_le32((void *)PCIL0_PIM0LAL, CONFIG_SYS_SDRAM_BASE);
+ out_le32((void *)PCIL0_PIM0LAH, 0);
+ out_le32((void *)PCIL0_PIM0SA, ~(gd->ram_size - 1) | 1);
+ out_le32((void *)PCIL0_BAR0, 0);
+
+ /*
+ * Program the board's subsystem id/vendor id
+ */
+ out_le16((void *)PCIL0_SBSYSVID, CONFIG_SYS_PCI_SUBSYS_VENDORID);
+ out_le16((void *)PCIL0_SBSYSID, CONFIG_SYS_PCI_SUBSYS_DEVICEID);
+
+ 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 */
+
+int pci_pre_init(struct pci_controller *hose)
+ __attribute__((weak, alias("__pci_pre_init")));
+
+#if defined(CONFIG_SYS_PCI_MASTER_INIT)
+void __pci_master_init(struct pci_controller *hose)
+{
+ u16 reg;
+
+ /*
+ * Write the PowerPC440 EP PCI Configuration regs.
+ * Enable PowerPC440 EP to be a master on the PCI bus (PMM).
+ * Enable PowerPC440 EP to act as a PCI memory target (PTM).
+ */
+ pci_read_config_word(0, PCI_COMMAND, &reg);
+ pci_write_config_word(0, PCI_COMMAND, reg |
+ PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+}
+void pci_master_init(struct pci_controller *hose)
+ __attribute__((weak, alias("__pci_master_init")));
+#endif /* CONFIG_SYS_PCI_MASTER_INIT */
int pci_440_init (struct pci_controller *hose)
{
@@ -548,7 +773,7 @@ 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;