From 32d00d0f933ea5d21c3cd0809461ebbf7ab89cef Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Thu, 24 Jul 2008 00:25:13 +0900 Subject: [MIPS] TXx9: PCI fixes for tx3927/tx4927 * Fix tx3927 pci ops for Type-1 configuration * Fix abort checking of tx3927 pci ops * Flush write buffer to avoid spurious PCI error interrupt * Add a quirk for FPCIB backplane Signed-off-by: Atsushi Nemoto Signed-off-by: Ralf Baechle --- arch/mips/pci/ops-tx3927.c | 46 +++++++++++++++++++--------------------------- 1 file changed, 19 insertions(+), 27 deletions(-) (limited to 'arch/mips/pci/ops-tx3927.c') diff --git a/arch/mips/pci/ops-tx3927.c b/arch/mips/pci/ops-tx3927.c index 8a17a39e5bf..c6bd79e71e2 100644 --- a/arch/mips/pci/ops-tx3927.c +++ b/arch/mips/pci/ops-tx3927.c @@ -41,41 +41,41 @@ #include #include -static inline int mkaddr(unsigned char bus, unsigned char dev_fn, - unsigned char where) +static int mkaddr(struct pci_bus *bus, unsigned char devfn, unsigned char where) { - if (bus == 0 && dev_fn >= PCI_DEVFN(TX3927_PCIC_MAX_DEVNU, 0)) - return PCIBIOS_DEVICE_NOT_FOUND; - - tx3927_pcicptr->ica = ((bus & 0xff) << 0x10) | - ((dev_fn & 0xff) << 0x08) | - (where & 0xfc); + if (bus->parent == NULL && + devfn >= PCI_DEVFN(TX3927_PCIC_MAX_DEVNU, 0)) + return -1; + tx3927_pcicptr->ica = + ((bus->number & 0xff) << 0x10) | + ((devfn & 0xff) << 0x08) | + (where & 0xfc) | (bus->parent ? 1 : 0); /* clear M_ABORT and Disable M_ABORT Int. */ tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; tx3927_pcicptr->pcistatim &= ~PCI_STATUS_REC_MASTER_ABORT; - - return PCIBIOS_SUCCESSFUL; + return 0; } static inline int check_abort(void) { - if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT) + if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT) { tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; tx3927_pcicptr->pcistatim |= PCI_STATUS_REC_MASTER_ABORT; + /* flush write buffer */ + iob(); return PCIBIOS_DEVICE_NOT_FOUND; - + } return PCIBIOS_SUCCESSFUL; } static int tx3927_pci_read_config(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val) { - int ret; - - ret = mkaddr(bus->number, devfn, where); - if (ret) - return ret; + if (mkaddr(bus, devfn, where)) { + *val = 0xffffffff; + return PCIBIOS_DEVICE_NOT_FOUND; + } switch (size) { case 1: @@ -97,11 +97,8 @@ static int tx3927_pci_read_config(struct pci_bus *bus, unsigned int devfn, static int tx3927_pci_write_config(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val) { - int ret; - - ret = mkaddr(bus->number, devfn, where); - if (ret) - return ret; + if (mkaddr(bus, devfn, where)) + return PCIBIOS_DEVICE_NOT_FOUND; switch (size) { case 1: @@ -117,11 +114,6 @@ static int tx3927_pci_write_config(struct pci_bus *bus, unsigned int devfn, tx3927_pcicptr->icd = cpu_to_le32(val); } - if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT) - tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; - tx3927_pcicptr->pcistatim |= PCI_STATUS_REC_MASTER_ABORT; - return PCIBIOS_DEVICE_NOT_FOUND; - return check_abort(); } -- cgit v1.2.3