board/mpl/common/pci.c

   1 /*-----------------------------------------------------------------------------+
   2 |
   3 |       This source code has been made available to you by IBM on an AS-IS
   4 |       basis.  Anyone receiving this source is licensed under IBM
   5 |       copyrights to use it in any way he or she deems fit, including
   6 |       copying it, modifying it, compiling it, and redistributing it either
   7 |       with or without modifications.  No license under IBM patents or
   8 |       patent applications is to be implied by the copyright license.
   9 |
  10 |       Any user of this software should understand that IBM cannot provide
  11 |       technical support for this software and will not be responsible for
  12 |       any consequences resulting from the use of this software.
  13 |
  14 |       Any person who transfers this source code or any derivative work
  15 |       must include the IBM copyright notice, this paragraph, and the
  16 |       preceding two paragraphs in the transferred software.
  17 |
  18 |       COPYRIGHT   I B M   CORPORATION 1995
  19 |       LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
  20 +-----------------------------------------------------------------------------*/
  21 /*
  22  * Adapted for PIP405 03.07.01
  23  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
  24  *
  25  * TODO: Clean-up
  26  */
  27
  28 #include <common.h>
  29 #include <pci.h>
  30 #include "isa.h"
  31
  32 #ifdef CONFIG_405GP
  33 #ifdef CONFIG_PCI
  34
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 #include "piix4_pci.h"
  38 #include "pci_parts.h"
  39
  40 void pci_pip405_write_regs(struct pci_controller *hose, pci_dev_t dev,
  41                            struct pci_config_table *entry)
  42 {
  43         struct pci_pip405_config_entry *table;
  44         int i;
  45
  46         table = (struct pci_pip405_config_entry*) entry->priv[0];
  47
  48         for (i=0; table[i].width; i++)
  49         {
  50 #ifdef DEBUG
  51                 printf("Reg 0x%02X Value 0x%08lX Width %02d written\n",
  52                        table[i].index, table[i].val, table[i].width);
  53 #endif
  54
  55                 switch(table[i].width)
  56                 {
  57                 case 1: pci_hose_write_config_byte(hose, dev, table[i].index, table[i].val); break;
  58                 case 2: pci_hose_write_config_word(hose, dev, table[i].index, table[i].val); break;
  59                 case 4: pci_hose_write_config_dword(hose, dev, table[i].index, table[i].val); break;
  60                 }
  61         }
  62 }
  63
  64
  65 static void pci_pip405_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
  66 {
  67         unsigned char int_line = 0xff;
  68         unsigned char pin;
  69         /*
  70          * Write pci interrupt line register
  71          */
  72         if(PCI_DEV(dev)==0) /* Device0 = PPC405 -> skip */
  73                 return;
  74         pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
  75         if ((pin == 0) || (pin > 4))
  76             return;
  77
  78         int_line = ((PCI_DEV(dev) + (pin-1) + 10) % 4) + 28;
  79         pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, int_line);
  80 #ifdef DEBUG
  81         printf("Fixup IRQ: dev %d (%x) int line %d 0x%x\n",
  82                PCI_DEV(dev),dev,int_line,int_line);
  83 #endif
  84 }
  85
  86 extern void pci_405gp_init(struct pci_controller *hose);
  87
  88
  89 static struct pci_controller hose = {
  90   config_table: pci_pip405_config_table,
  91   fixup_irq: pci_pip405_fixup_irq,
  92 };
  93
  94
  95 static void reloc_pci_cfg_table(struct pci_config_table *table)
  96 {
  97         unsigned long addr;
  98
  99         for (; table && table->vendor; table++) {
 100                 addr = (ulong) (table->config_device) + gd->reloc_off;
 101 #ifdef DEBUG
 102                 printf ("device \"%d\": 0x%08lx => 0x%08lx\n",
 103                                 table->device, (ulong) (table->config_device), addr);
 104 #endif
 105                 table->config_device =
 106                         (void (*)(struct pci_controller* hose, pci_dev_t dev,
 107                               struct pci_config_table *))addr;
 108                 table->priv[0]+=gd->reloc_off;
 109         }
 110 }
 111
 112 void pci_init_board(void)
 113 {
 114         /*we want the ptrs to RAM not flash (ie don't use init list)*/
 115         hose.fixup_irq    = pci_pip405_fixup_irq;
 116         hose.config_table = pci_pip405_config_table;
 117         reloc_pci_cfg_table(hose.config_table);
 118 #ifdef DEBUG
 119         printf("Init PCI: fixup_irq=%p config_table=%p hose=%p\n",pci_pip405_fixup_irq,pci_pip405_config_table,hose);
 120 #endif
 121         pci_405gp_init(&hose);
 122 }
 123
 124 #endif /* CONFIG_PCI */
 125 #endif /* CONFIG_405GP */