LXR uboot/arch/x86/cpu/queensbay/irq.c

   1/*
   2 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
   3 * Copyright (C) 2015 Google, Inc
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <common.h>
   9#include <dm.h>
  10#include <asm/io.h>
  11#include <asm/irq.h>
  12#include <asm/pci.h>
  13#include <asm/arch/device.h>
  14#include <asm/arch/tnc.h>
  15
  16int queensbay_irq_router_probe(struct udevice *dev)
  17{
  18        struct tnc_rcba *rcba;
  19        u32 base;
  20
  21        dm_pci_read_config32(dev->parent, LPC_RCBA, &base);
  22        base &= ~MEM_BAR_EN;
  23        rcba = (struct tnc_rcba *)base;
  24
  25        /* Make sure all internal PCI devices are using INTA */
  26        writel(INTA, &rcba->d02ip);
  27        writel(INTA, &rcba->d03ip);
  28        writel(INTA, &rcba->d27ip);
  29        writel(INTA, &rcba->d31ip);
  30        writel(INTA, &rcba->d23ip);
  31        writel(INTA, &rcba->d24ip);
  32        writel(INTA, &rcba->d25ip);
  33        writel(INTA, &rcba->d26ip);
  34
  35        /*
  36         * Route TunnelCreek PCI device interrupt pin to PIRQ
  37         *
  38         * Since PCIe downstream ports received INTx are routed to PIRQ
  39         * A/B/C/D directly and not configurable, we have to route PCIe
  40         * root ports' INTx to PIRQ A/B/C/D as well. For other devices
  41         * on TunneCreek, route them to PIRQ E/F/G/H.
  42         */
  43        writew(PIRQE, &rcba->d02ir);
  44        writew(PIRQF, &rcba->d03ir);
  45        writew(PIRQG, &rcba->d27ir);
  46        writew(PIRQH, &rcba->d31ir);
  47        writew(PIRQA, &rcba->d23ir);
  48        writew(PIRQB, &rcba->d24ir);
  49        writew(PIRQC, &rcba->d25ir);
  50        writew(PIRQD, &rcba->d26ir);
  51
  52        return irq_router_common_init(dev);
  53}
  54
  55static const struct udevice_id queensbay_irq_router_ids[] = {
  56        { .compatible = "intel,queensbay-irq-router" },
  57        { }
  58};
  59
  60U_BOOT_DRIVER(queensbay_irq_router_drv) = {
  61        .name           = "queensbay_intel_irq",
  62        .id             = UCLASS_IRQ,
  63        .of_match       = queensbay_irq_router_ids,
  64        .probe          = queensbay_irq_router_probe,
  65};
  66