diff options
| author | Jayachandran C <jayachandranc@netlogicmicro.com> | 2011-05-07 01:37:31 +0530 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-05-19 09:55:41 +0100 |
| commit | 9b130f8004e51c65b20b0f0e17cdee073a719047 (patch) | |
| tree | 3562752ebe2168361a09dd16baace9b6884672d8 /arch/mips/netlogic | |
| parent | f9cab74fd9b0cf19f52a989694e7a1d8213af3a1 (diff) | |
MIPS: XLR, XLS: Add PCI support.
Adds pci/pci-xlr.c to support for XLR PCI/PCI-X interface and XLS PCIe
interface.
Update irq.c to ack PCI interrupts, use irq handler data to do the
PCI/PCIe bus ack.
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2337/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/netlogic')
| -rw-r--r-- | arch/mips/netlogic/xlr/irq.c | 86 |
1 files changed, 85 insertions, 1 deletions
diff --git a/arch/mips/netlogic/xlr/irq.c b/arch/mips/netlogic/xlr/irq.c index 2033f5656f6..1446d58e364 100644 --- a/arch/mips/netlogic/xlr/irq.c +++ b/arch/mips/netlogic/xlr/irq.c @@ -83,14 +83,71 @@ static void xlr_pic_mask(struct irq_data *d) spin_unlock_irqrestore(&nlm_pic_lock, flags); } +#ifdef CONFIG_PCI +/* Extra ACK needed for XLR on chip PCI controller */ +static void xlr_pci_ack(struct irq_data *d) +{ + nlm_reg_t *pci_mmio = netlogic_io_mmio(NETLOGIC_IO_PCIX_OFFSET); + + netlogic_read_reg(pci_mmio, (0x140 >> 2)); +} + +/* Extra ACK needed for XLS on chip PCIe controller */ +static void xls_pcie_ack(struct irq_data *d) +{ + nlm_reg_t *pcie_mmio_le = netlogic_io_mmio(NETLOGIC_IO_PCIE_1_OFFSET); + + switch (d->irq) { + case PIC_PCIE_LINK0_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x90 >> 2), 0xffffffff); + break; + case PIC_PCIE_LINK1_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x94 >> 2), 0xffffffff); + break; + case PIC_PCIE_LINK2_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x190 >> 2), 0xffffffff); + break; + case PIC_PCIE_LINK3_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x194 >> 2), 0xffffffff); + break; + } +} + +/* For XLS B silicon, the 3,4 PCI interrupts are different */ +static void xls_pcie_ack_b(struct irq_data *d) +{ + nlm_reg_t *pcie_mmio_le = netlogic_io_mmio(NETLOGIC_IO_PCIE_1_OFFSET); + + switch (d->irq) { + case PIC_PCIE_LINK0_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x90 >> 2), 0xffffffff); + break; + case PIC_PCIE_LINK1_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x94 >> 2), 0xffffffff); + break; + case PIC_PCIE_XLSB0_LINK2_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x190 >> 2), 0xffffffff); + break; + case PIC_PCIE_XLSB0_LINK3_IRQ: + netlogic_write_reg(pcie_mmio_le, (0x194 >> 2), 0xffffffff); + break; + } +} +#endif + static void xlr_pic_ack(struct irq_data *d) { unsigned long flags; nlm_reg_t *mmio; int irq = d->irq; + void *hd = irq_data_get_irq_handler_data(d); WARN(!PIC_IRQ_IS_IRT(irq), "Bad irq %d", irq); + if (hd) { + void (*extra_ack)(void *) = hd; + extra_ack(d); + } mmio = netlogic_io_mmio(NETLOGIC_IO_PIC_OFFSET); spin_lock_irqsave(&nlm_pic_lock, flags); netlogic_write_reg(mmio, PIC_INT_ACK, (1 << (irq - PIC_IRQ_BASE))); @@ -162,6 +219,33 @@ void __init init_xlr_irqs(void) nlm_irq_mask |= ((1ULL << IRQ_IPI_SMP_FUNCTION) | (1ULL << IRQ_IPI_SMP_RESCHEDULE)); #endif + +#ifdef CONFIG_PCI + /* + * For PCI interrupts, we need to ack the PIC controller too, overload + * irq handler data to do this + */ + if (nlm_chip_is_xls()) { + if (nlm_chip_is_xls_b()) { + irq_set_handler_data(PIC_PCIE_LINK0_IRQ, + xls_pcie_ack_b); + irq_set_handler_data(PIC_PCIE_LINK1_IRQ, + xls_pcie_ack_b); + irq_set_handler_data(PIC_PCIE_XLSB0_LINK2_IRQ, + xls_pcie_ack_b); + irq_set_handler_data(PIC_PCIE_XLSB0_LINK3_IRQ, + xls_pcie_ack_b); + } else { + irq_set_handler_data(PIC_PCIE_LINK0_IRQ, xls_pcie_ack); + irq_set_handler_data(PIC_PCIE_LINK1_IRQ, xls_pcie_ack); + irq_set_handler_data(PIC_PCIE_LINK2_IRQ, xls_pcie_ack); + irq_set_handler_data(PIC_PCIE_LINK3_IRQ, xls_pcie_ack); + } + } else { + /* XLR PCI controller ACK */ + irq_set_handler_data(PIC_PCIE_XLSB0_LINK3_IRQ, xlr_pci_ack); + } +#endif /* unmask all PIC related interrupts. If no handler is installed by the * drivers, it'll just ack the interrupt and return */ @@ -199,7 +283,7 @@ asmlinkage void plat_irq_dispatch(void) return; } - /* TODO use dcltz: optimize below code */ + /* use dcltz: optimize below code */ for (i = 63; i != -1; i--) { if (eirr & (1ULL << i)) break; |