src/mainboard/bcom/winnet100/irq_tables.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2007 Juergen Beisert <juergen@kreuzholzen.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * Interrupt routing description for BCOM's Winnet100 board.
  24  * It was not possible to read back the pirq-Table. In the 0xF segment was
  25  * no string like $PIRQ...
  26  * But the already running 2.4.21 kernel provides eth0 IRQ15 and USB IRQ 11.
  27  * The Realtek was device 0.f.0, the USB 0.13.0.
  28  *
  29  * This is the physical routing on this board:
  30  *
  31  *    5530       USB      Network
  32  * northbridge  device     device
  33  *              00.13.0   00.0f.00
  34  * ------------------------------------
  35  *   INTA#      INTA#      n.c.
  36  *   INTB#       n.c.      n.c.
  37  *   INTC#       n.c.     INTA#
  38  *   INTD#       n.c.      n.c.
  39  */
  40
  41 #include <arch/pirq_routing.h>
  42
  43 #define INT_A 0x01
  44 #define INT_B 0x02
  45 #define INT_C 0x03
  46 #define INT_D 0x04
  47
  48 /*
  49  * The USB controller should be connected to IRQ11,
  50  * the network controller should be connected to IRQ15.
  51  */
  52 #define IRQ_BITMAP_LINK0 0x0800
  53 #define IRQ_BITMAP_LINK1 0x0400
  54 #define IRQ_BITMAP_LINK2 0x8000
  55 #define IRQ_BITMAP_LINK3 0x0200
  56
  57 /** Reserved interrupt channels for exclusive PCI usage. */
  58 #define IRQ_DEVOTED_TO_PCI (IRQ_BITMAP_LINK0 | IRQ_BITMAP_LINK2)
  59
  60 /**
  61  * Routing description.
  62  * Documentation at: http://www.microsoft.com/whdc/archive/pciirq.mspx
  63  */
  64 const struct irq_routing_table intel_irq_routing_table = {
  65         .signature = PIRQ_SIGNATURE,    /* PIRQ signature */
  66         .version = PIRQ_VERSION,        /* PIRQ version */
  67         .size = 32 +16 * IRQ_SLOT_COUNT,/* Max. IRQ_SLOT_COUNT devices */
  68         .rtr_bus = 0x00,                /* Interrupt router bus */
  69         .rtr_devfn = (0x12 << 3) | 0x0, /* Interrupt router device */
  70         .exclusive_irqs = IRQ_DEVOTED_TO_PCI,   /* IRQs devoted to PCI */
  71         .rtr_vendor = 0x1078,           /* Vendor */
  72         .rtr_device = 0x0100,           /* Device */
  73         .miniport_data = 0,             /* Crap (miniport) */
  74         .checksum = 0xbf + 16,          /* Checksum */
  75         .slots = {
  76                 /*
  77                  * Definition for "slot#1". There is no real slot,
  78                  * the USB device is embedded...
  79                  */
  80                 [0] = {
  81                         .bus = 0x00,
  82                         .devfn = (0x13 << 3) | 0x0,
  83                         .irq = {
  84                                 /*      Link   Bitmap */
  85                                 [0] = { INT_A, IRQ_BITMAP_LINK0 },
  86                                 [1] = { INT_B, IRQ_BITMAP_LINK1 },
  87                                 [2] = { INT_C, IRQ_BITMAP_LINK2 },
  88                                 [3] = { INT_D, IRQ_BITMAP_LINK3 },
  89                         },
  90                         .slot = 0x0,
  91                 },
  92
  93                 /*
  94                  * Definition for "slot#3". There is no real slot,
  95                  * the network device is soldered...
  96                  */
  97                 [1] = {
  98                         .bus = 0x00,
  99                         .devfn = (0x0f << 3) | 0x0,
 100                         .irq = {
 101                                 /*      Link   Bitmap */
 102                                 [0] = { INT_C, IRQ_BITMAP_LINK2 },
 103                                 [1] = { INT_D, IRQ_BITMAP_LINK3 },
 104                                 [2] = { INT_A, IRQ_BITMAP_LINK0 },
 105                                 [3] = { INT_B, IRQ_BITMAP_LINK1 },
 106                         },
 107                         .slot = 0x0,
 108                 }
 109         }
 110 };
 111
 112 /**
 113  * Copy the IRQ routing table to memory.
 114  *
 115  * @param[in] addr Destination address (between 0xF0000...0x100000).
 116  * @return TODO.
 117  */
 118 unsigned long write_pirq_routing_table(unsigned long addr)
 119 {
 120         return copy_pirq_routing_table(addr);
 121 }