From 0ac8b1f437aa71c205f498d068d9d097cf72ce03 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 19 Jan 2016 21:32:31 -0700 Subject: dm: x86: queensbay: Add an interrupt driver Add a driver for interrupts on queensbay and move the code currently in cpu_irq_init() into its probe() method. Signed-off-by: Simon Glass Reviewed-by: Bin Meng Tested-by: Bin Meng --- arch/x86/cpu/queensbay/irq.c | 65 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 arch/x86/cpu/queensbay/irq.c (limited to 'arch/x86/cpu/queensbay/irq.c') diff --git a/arch/x86/cpu/queensbay/irq.c b/arch/x86/cpu/queensbay/irq.c new file mode 100644 index 0000000000..44369f7ec7 --- /dev/null +++ b/arch/x86/cpu/queensbay/irq.c @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2014, Bin Meng + * Copyright (C) 2015 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include + +int queensbay_irq_router_probe(struct udevice *dev) +{ + struct tnc_rcba *rcba; + u32 base; + + base = x86_pci_read_config32(TNC_LPC, LPC_RCBA); + base &= ~MEM_BAR_EN; + rcba = (struct tnc_rcba *)base; + + /* Make sure all internal PCI devices are using INTA */ + writel(INTA, &rcba->d02ip); + writel(INTA, &rcba->d03ip); + writel(INTA, &rcba->d27ip); + writel(INTA, &rcba->d31ip); + writel(INTA, &rcba->d23ip); + writel(INTA, &rcba->d24ip); + writel(INTA, &rcba->d25ip); + writel(INTA, &rcba->d26ip); + + /* + * Route TunnelCreek PCI device interrupt pin to PIRQ + * + * Since PCIe downstream ports received INTx are routed to PIRQ + * A/B/C/D directly and not configurable, we have to route PCIe + * root ports' INTx to PIRQ A/B/C/D as well. For other devices + * on TunneCreek, route them to PIRQ E/F/G/H. + */ + writew(PIRQE, &rcba->d02ir); + writew(PIRQF, &rcba->d03ir); + writew(PIRQG, &rcba->d27ir); + writew(PIRQH, &rcba->d31ir); + writew(PIRQA, &rcba->d23ir); + writew(PIRQB, &rcba->d24ir); + writew(PIRQC, &rcba->d25ir); + writew(PIRQD, &rcba->d26ir); + + return irq_router_common_init(dev); +} + +static const struct udevice_id queensbay_irq_router_ids[] = { + { .compatible = "intel,queensbay-irq-router" }, + { } +}; + +U_BOOT_DRIVER(queensbay_irq_router_drv) = { + .name = "queensbay_intel_irq", + .id = UCLASS_IRQ, + .of_match = queensbay_irq_router_ids, + .probe = queensbay_irq_router_probe, +}; -- cgit