src/mainboard/pcengines/apu2/irq_tables.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <commonlib/bsd/helpers.h>
   5 #include <device/pci_def.h>
   6 #include <string.h>
   7 #include <stdint.h>
   8 #include <arch/pirq_routing.h>
   9
  10 static void write_pirq_info(struct irq_info *pirq_info, u8 bus, u8 devfn,
  11                             u8 link0, u16 bitmap0, u8 link1, u16 bitmap1,
  12                             u8 link2, u16 bitmap2, u8 link3, u16 bitmap3,
  13                             u8 slot, u8 rfu)
  14 {
  15         pirq_info->bus = bus;
  16         pirq_info->devfn = devfn;
  17         pirq_info->irq[0].link = link0;
  18         pirq_info->irq[0].bitmap = bitmap0;
  19         pirq_info->irq[1].link = link1;
  20         pirq_info->irq[1].bitmap = bitmap1;
  21         pirq_info->irq[2].link = link2;
  22         pirq_info->irq[2].bitmap = bitmap2;
  23         pirq_info->irq[3].link = link3;
  24         pirq_info->irq[3].bitmap = bitmap3;
  25         pirq_info->slot = slot;
  26         pirq_info->rfu = rfu;
  27 }
  28
  29 unsigned long write_pirq_routing_table(unsigned long addr)
  30 {
  31         struct irq_routing_table *pirq;
  32         struct irq_info *pirq_info;
  33         u32 slot_num;
  34         u8 *v;
  35
  36         u8 sum = 0;
  37         int i;
  38
  39         /* Align the table to be 16 byte aligned. */
  40         addr = ALIGN_UP(addr, 16);
  41
  42         /* This table must be between 0xf0000 & 0x100000 */
  43         printk(BIOS_INFO, "Writing IRQ routing tables to 0x%lx...", addr);
  44
  45         pirq = (void *)(addr);
  46         v = (u8 *)(addr);
  47
  48         pirq->signature = PIRQ_SIGNATURE;
  49         pirq->version = PIRQ_VERSION;
  50
  51         pirq->rtr_bus = 0;
  52         pirq->rtr_devfn = PCI_DEVFN(0x14, 4);
  53
  54         pirq->exclusive_irqs = 0;
  55
  56         pirq->rtr_vendor = 0x1002;
  57         pirq->rtr_device = 0x4384;
  58
  59         pirq->miniport_data = 0;
  60
  61         memset(pirq->rfu, 0, sizeof(pirq->rfu));
  62
  63         pirq_info = (void *)(&pirq->checksum + 1);
  64         slot_num = 0;
  65
  66         /* pci bridge */
  67         write_pirq_info(pirq_info, 0, PCI_DEVFN(0x14, 4),
  68                         0x1, 0xdee8, 0x2, 0xdee8, 0x3, 0xdee8, 0x4, 0xdee8, 0,
  69                         0);
  70         pirq_info++;
  71
  72         slot_num++;
  73
  74         pirq->size = 32 + 16 * slot_num;
  75
  76         for (i = 0; i < pirq->size; i++)
  77                 sum += v[i];
  78
  79         sum = pirq->checksum - sum;
  80
  81         if (sum != pirq->checksum) {
  82                 pirq->checksum = sum;
  83         }
  84
  85         printk(BIOS_INFO, "%s done.\n", __func__);
  86
  87         return (unsigned long)pirq_info;
  88 }