diff options
Diffstat (limited to 'cpu/ppc4xx/440spe_pcie.c')
| -rw-r--r-- | cpu/ppc4xx/440spe_pcie.c | 111 |
1 files changed, 87 insertions, 24 deletions
diff --git a/cpu/ppc4xx/440spe_pcie.c b/cpu/ppc4xx/440spe_pcie.c index 2d0b406..158f1c5 100644 --- a/cpu/ppc4xx/440spe_pcie.c +++ b/cpu/ppc4xx/440spe_pcie.c @@ -40,6 +40,23 @@ 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), @@ -60,18 +77,35 @@ static void pcie_dmer_enable(void) 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; + + /* + * Bus numbers are relative to hose->first_busno + */ + devfn -= PCI_BDF(hose->first_busno, 0, 0); + /* - * 440SPE implements only one function per port + * 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_FUNC(devfn) == 0) && (PCI_DEV(devfn) == 1))) + 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; /* @@ -101,13 +135,24 @@ static int pcie_read_config(struct pci_controller *hose, unsigned int devfn, static int pcie_write_config(struct pci_controller *hose, unsigned int devfn, int offset, int len, u32 val) { + u8 *address; + /* - * 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); + + /* + * Same constraints as in pcie_read_config(). + */ + 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; /* @@ -137,7 +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; } @@ -794,12 +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: @@ -822,14 +867,9 @@ void ppc440spe_setup_pcie_rootpoint(struct pci_controller *hose, int port) /* * Set bus numbers on our root port */ - if (ppc440spe_revB()) { - out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0); - out_8((u8 *)mbase + PCI_SECONDARY_BUS, 1); - out_8((u8 *)mbase + PCI_SUBORDINATE_BUS, 1); - } else { - out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0); - out_8((u8 *)mbase + PCI_SECONDARY_BUS, 0); - } + out_8((u8 *)mbase + PCI_PRIMARY_BUS, 0); + out_8((u8 *)mbase + PCI_SECONDARY_BUS, 1); + out_8((u8 *)mbase + PCI_SUBORDINATE_BUS, 1); /* * Set up outbound translation to hose->mem_space from PLB @@ -886,6 +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) @@ -963,8 +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; |