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Diffstat (limited to 'cpu/ppc4xx/440spe_pcie.c')
-rw-r--r--cpu/ppc4xx/440spe_pcie.c141
1 files changed, 124 insertions, 17 deletions
diff --git a/cpu/ppc4xx/440spe_pcie.c b/cpu/ppc4xx/440spe_pcie.c
index d6c4be5..158f1c5 100644
--- a/cpu/ppc4xx/440spe_pcie.c
+++ b/cpu/ppc4xx/440spe_pcie.c
@@ -1,5 +1,5 @@
/*
- * (C) Copyright 2006
+ * (C) Copyright 2006 - 2007
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright (c) 2005 Cisco Systems. All rights reserved.
@@ -40,19 +40,81 @@ enum {
LNKW_X8 = 0x8
};
+static u8* pcie_get_base(struct pci_controller *hose, unsigned int devfn)
+{
+ u8 *base = (u8*)hose->cfg_data;
+
+ /* use local configuration space for the first bus */
+ if (PCI_BUS(devfn) == 0) {
+ if (hose->cfg_data == (u8*)CFG_PCIE0_CFGBASE)
+ base = (u8*)CFG_PCIE0_XCFGBASE;
+ if (hose->cfg_data == (u8*)CFG_PCIE1_CFGBASE)
+ base = (u8*)CFG_PCIE1_XCFGBASE;
+ if (hose->cfg_data == (u8*)CFG_PCIE2_CFGBASE)
+ base = (u8*)CFG_PCIE2_XCFGBASE;
+ }
+
+ return base;
+}
+
+static void pcie_dmer_disable(void)
+{
+ mtdcr (DCRN_PEGPL_CFG(DCRN_PCIE0_BASE),
+ mfdcr (DCRN_PEGPL_CFG(DCRN_PCIE0_BASE)) | GPL_DMER_MASK_DISA);
+ mtdcr (DCRN_PEGPL_CFG(DCRN_PCIE1_BASE),
+ mfdcr (DCRN_PEGPL_CFG(DCRN_PCIE1_BASE)) | GPL_DMER_MASK_DISA);
+ mtdcr (DCRN_PEGPL_CFG(DCRN_PCIE2_BASE),
+ mfdcr (DCRN_PEGPL_CFG(DCRN_PCIE2_BASE)) | GPL_DMER_MASK_DISA);
+}
+
+static void pcie_dmer_enable(void)
+{
+ mtdcr (DCRN_PEGPL_CFG (DCRN_PCIE0_BASE),
+ mfdcr (DCRN_PEGPL_CFG(DCRN_PCIE0_BASE)) & ~GPL_DMER_MASK_DISA);
+ mtdcr (DCRN_PEGPL_CFG (DCRN_PCIE1_BASE),
+ mfdcr (DCRN_PEGPL_CFG(DCRN_PCIE1_BASE)) & ~GPL_DMER_MASK_DISA);
+ mtdcr (DCRN_PEGPL_CFG (DCRN_PCIE2_BASE),
+ mfdcr (DCRN_PEGPL_CFG(DCRN_PCIE2_BASE)) & ~GPL_DMER_MASK_DISA);
+}
+
static int pcie_read_config(struct pci_controller *hose, unsigned int devfn,
int offset, int len, u32 *val) {
+ u8 *address;
*val = 0;
+
/*
- * 440SPE implements only one function per port
+ * Bus numbers are relative to hose->first_busno
*/
- if (!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 1)))
+ devfn -= PCI_BDF(hose->first_busno, 0, 0);
+
+ /*
+ * NOTICE: configuration space ranges are currenlty mapped only for
+ * the first 16 buses, so such limit must be imposed. In case more
+ * buses are required the TLB settings in board/amcc/<board>/init.S
+ * need to be altered accordingly (one bus takes 1 MB of memory space).
+ */
+ if (PCI_BUS(devfn) >= 16)
return 0;
- devfn = PCI_BDF(0,0,0);
+ /*
+ * Only single device/single function is supported for the primary and
+ * secondary buses of the 440SPe host bridge.
+ */
+ if ((!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 0))) &&
+ ((PCI_BUS(devfn) == 0) || (PCI_BUS(devfn) == 1)))
+ return 0;
+
+ address = pcie_get_base(hose, devfn);
offset += devfn << 4;
+ /*
+ * Reading from configuration space of non-existing device can
+ * generate transaction errors. For the read duration we suppress
+ * assertion of machine check exceptions to avoid those.
+ */
+ pcie_dmer_disable ();
+
switch (len) {
case 1:
*val = in_8(hose->cfg_data + offset);
@@ -61,24 +123,43 @@ static int pcie_read_config(struct pci_controller *hose, unsigned int devfn,
*val = in_le16((u16 *)(hose->cfg_data + offset));
break;
default:
- *val = in_le32((u32 *)(hose->cfg_data + offset));
+ *val = in_le32((u32*)(hose->cfg_data + offset));
break;
}
+
+ pcie_dmer_enable ();
+
return 0;
}
static int pcie_write_config(struct pci_controller *hose, unsigned int devfn,
int offset, int len, u32 val) {
+ u8 *address;
+
+ /*
+ * Bus numbers are relative to hose->first_busno
+ */
+ devfn -= PCI_BDF(hose->first_busno, 0, 0);
+
/*
- * 440SPE implements only one function per port
+ * Same constraints as in pcie_read_config().
*/
- if (!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 1)))
+ if (PCI_BUS(devfn) >= 16)
return 0;
- devfn = PCI_BDF(0,0,0);
+ if ((!((PCI_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 0))) &&
+ ((PCI_BUS(devfn) == 0) || (PCI_BUS(devfn) == 1)))
+ return 0;
+
+ address = pcie_get_base(hose, devfn);
offset += devfn << 4;
+ /*
+ * Suppress MCK exceptions, similar to pcie_read_config()
+ */
+ pcie_dmer_disable ();
+
switch (len) {
case 1:
out_8(hose->cfg_data + offset, val);
@@ -90,6 +171,9 @@ static int pcie_write_config(struct pci_controller *hose, unsigned int devfn,
out_le32((u32 *)(hose->cfg_data + offset), val);
break;
}
+
+ pcie_dmer_enable ();
+
return 0;
}
@@ -98,7 +182,7 @@ int pcie_read_config_byte(struct pci_controller *hose,pci_dev_t dev,int offset,u
u32 v;
int rv;
- rv = pcie_read_config(hose, dev, offset, 1, &v);
+ rv = pcie_read_config(hose, dev, offset, 1, &v);
*val = (u8)v;
return rv;
}
@@ -755,12 +839,12 @@ void ppc440spe_setup_pcie_rootpoint(struct pci_controller *hose, int port)
volatile void *rmbase = NULL;
pci_set_ops(hose,
- pcie_read_config_byte,
- pcie_read_config_word,
- pcie_read_config_dword,
- pcie_write_config_byte,
- pcie_write_config_word,
- pcie_write_config_dword);
+ pcie_read_config_byte,
+ pcie_read_config_word,
+ pcie_read_config_dword,
+ pcie_write_config_byte,
+ pcie_write_config_word,
+ pcie_write_config_dword);
switch (port) {
case 0:
@@ -842,6 +926,29 @@ void ppc440spe_setup_pcie_rootpoint(struct pci_controller *hose, int port)
in_le16((u16 *)(mbase + PCI_COMMAND)) |
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
printf("PCIE:%d successfully set as rootpoint\n",port);
+
+ /* Set Device and Vendor Id */
+ switch (port) {
+ case 0:
+ out_le16(mbase + 0x200, 0xaaa0);
+ out_le16(mbase + 0x202, 0xbed0);
+ break;
+ case 1:
+ out_le16(mbase + 0x200, 0xaaa1);
+ out_le16(mbase + 0x202, 0xbed1);
+ break;
+ case 2:
+ out_le16(mbase + 0x200, 0xaaa2);
+ out_le16(mbase + 0x202, 0xbed2);
+ break;
+ default:
+ out_le16(mbase + 0x200, 0xaaa3);
+ out_le16(mbase + 0x202, 0xbed3);
+ }
+
+ /* Set Class Code to PCI-PCI bridge and Revision Id to 1 */
+ out_le32(mbase + 0x208, 0x06040001);
+
}
int ppc440spe_setup_pcie_endpoint(struct pci_controller *hose, int port)
@@ -919,8 +1026,8 @@ int ppc440spe_setup_pcie_endpoint(struct pci_controller *hose, int port)
/* Enable I/O, Mem, and Busmaster cycles */
out_le16((u16 *)(mbase + PCI_COMMAND),
- in_le16((u16 *)(mbase + PCI_COMMAND)) |
- PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+ in_le16((u16 *)(mbase + PCI_COMMAND)) |
+ PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
out_le16(mbase + 0x200,0xcaad); /* Setting vendor ID */
out_le16(mbase + 0x202,0xfeed); /* Setting device ID */
attempts = 10;
generated by cgit v1.1 at 2024-11-07 05:14:46 +0000