src/mainboard/bcom/winnet100/irq_tables.c

   1 /*
   2  * This file is part of the LinuxBIOS 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 /*
  44  * The USB controller should be connected to IRQ11,
  45  * the network controller should be connected to IRQ15.
  46  */
  47 #define IRQ_BITMAP_LINK0 0x0800
  48 #define IRQ_BITMAP_LINK1 0x0400
  49 #define IRQ_BITMAP_LINK2 0x8000
  50 #define IRQ_BITMAP_LINK3 0x0200
  51
  52 /** Reserved interrupt channels for PCI. */
  53 #define IRQ_DEVOTED_TO_PCI (IRQ_BITMAP_LINK0 | IRQ_BITMAP_LINK2)
  54
  55 /**
  56  * Routing description.
  57  * Documentation at: http://www.microsoft.com/whdc/archive/pciirq.mspx
  58  */
  59 const struct irq_routing_table intel_irq_routing_table = {
  60         .signature = PIRQ_SIGNATURE,    /* u32 signature */
  61         .version = PIRQ_VERSION,        /* u16 version */
  62         .size = 32+16*IRQ_SLOT_COUNT,   /* There can be total IRQ_SLOT_COUNT devices on the bus */
  63         .rtr_bus = 0x00,                /* Where the interrupt router lies (bus) */
  64         .rtr_devfn = (0x12<<3)|0x0,     /* Where the interrupt router lies (dev) */
  65         .exclusive_irqs = IRQ_DEVOTED_TO_PCI,   /* IRQs devoted exclusively to PCI usage */
  66         .rtr_vendor = 0x1078,           /* Vendor */
  67         .rtr_device = 0x0100,           /* Device */
  68         .miniport_data = 0,             /* Crap (miniport) */
  69         .checksum = 0xBF+16,
  70         .slots = {
  71                 /*
  72                  * Definition for "slot#1". There is no real slot,
  73                  * the USB device is embedded...
  74                  */
  75                 [0] = {
  76                         .bus = 0x00,
  77                         .devfn = (0x13 << 3) | 0x0,
  78                         .irq = {
  79                                 [0] = {
  80                                         .link = 0x01,   /* INT A */
  81                                         .bitmap = IRQ_BITMAP_LINK0,
  82                                 },
  83                                 [1] = {
  84                                         .link = 0x02,   /* INT B */
  85                                         .bitmap = IRQ_BITMAP_LINK1,
  86                                 },
  87                                 [2] = {
  88                                         .link = 0x03,   /* INT C */
  89                                         .bitmap = IRQ_BITMAP_LINK2,
  90                                 },
  91                                 [3] = {
  92                                         .link = 0x04,   /* INT D */
  93                                         .bitmap = IRQ_BITMAP_LINK3,
  94                                 }
  95                         },
  96                         .slot = 0x0,
  97                 },
  98
  99                 /*
 100                  * Definition for "slot#3". There is no real slot,
 101                  * the network device is soldered...
 102                  */
 103                 [1] = {
 104                         .bus = 0x00,
 105                         .devfn = (0x0f << 3) | 0x0,
 106                         .irq = {
 107                                 [0] = {
 108                                         .link = 0x03,
 109                                         .bitmap = IRQ_BITMAP_LINK2,
 110                                 },
 111                                 [1] = {
 112                                         .link = 0x04,
 113                                         .bitmap = IRQ_BITMAP_LINK3,
 114                                 },
 115                                 [2] = {
 116                                         .link = 0x01,
 117                                         .bitmap = IRQ_BITMAP_LINK0,
 118                                 },
 119                                 [3] = {
 120                                         .link = 0x02,
 121                                         .bitmap = IRQ_BITMAP_LINK1,
 122                                 }
 123                         },
 124                         .slot = 0x0,
 125                 }
 126         }
 127 };
 128
 129 /**
 130  * Copy the IRQ routing table to memory.
 131  *
 132  * @param[in] addr Destination address (between 0xF0000...0x100000).
 133  * @return TODO.
 134  */
 135 unsigned long write_pirq_routing_table(unsigned long addr)
 136 {
 137         return copy_pirq_routing_table(addr);
 138 }