board/mpl/common/pci.c

   1 /*
   2  * SPDX-License-Identifier:     GPL-2.0 IBM-pibs
   3  */
   4 /*
   5  * Adapted for PIP405 03.07.01
   6  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
   7  *
   8  * TODO: Clean-up
   9  */
  10
  11 #include <common.h>
  12 #include <pci.h>
  13 #include "isa.h"
  14
  15 #ifdef CONFIG_405GP
  16 #ifdef CONFIG_PCI
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 #include "piix4_pci.h"
  21 #include "pci_parts.h"
  22
  23 void pci_405gp_init(struct pci_controller *hose);
  24
  25 void pci_pip405_write_regs(struct pci_controller *hose, pci_dev_t dev,
  26                 struct pci_config_table *entry)
  27 {
  28         struct pci_pip405_config_entry *table;
  29         int i;
  30
  31         table = (struct pci_pip405_config_entry *)entry->priv[0];
  32
  33         for (i = 0; table[i].width; i++) {
  34 #ifdef DEBUG
  35                 printf("Reg 0x%02X Value 0x%08lX Width %02d written\n",
  36                        table[i].index, table[i].val, table[i].width);
  37 #endif
  38
  39                 switch (table[i].width) {
  40                 case 1:
  41                     pci_hose_write_config_byte(hose, dev,
  42                                                table[i].index, table[i].val);
  43                     break;
  44                 case 2:
  45                     pci_hose_write_config_word(hose, dev,
  46                                                table[i].index, table[i].val);
  47                     break;
  48                 case 4:
  49                     pci_hose_write_config_dword(hose, dev,
  50                                                 table[i].index, table[i].val);
  51                     break;
  52                 }
  53         }
  54 }
  55
  56
  57 static void pci_pip405_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
  58 {
  59         unsigned char int_line = 0xff;
  60         unsigned char pin;
  61         /*
  62          * Write pci interrupt line register
  63          */
  64         if (PCI_DEV(dev) == 0) /* Device0 = PPC405 -> skip */
  65                 return;
  66         pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
  67         if ((pin == 0) || (pin > 4))
  68                 return;
  69
  70         int_line = ((PCI_DEV(dev) + (pin-1) + 10) % 4) + 28;
  71         pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, int_line);
  72 #ifdef DEBUG
  73         printf("Fixup IRQ: dev %d (%x) int line %d 0x%x\n",
  74                PCI_DEV(dev), dev, int_line, int_line);
  75 #endif
  76 }
  77
  78
  79 static struct pci_controller hose = {
  80 config_table: pci_pip405_config_table,
  81 fixup_irq : pci_pip405_fixup_irq,
  82 };
  83
  84
  85 void pci_init_board(void)
  86 {
  87         /*we want the ptrs to RAM not flash (ie don't use init list)*/
  88         hose.fixup_irq    = pci_pip405_fixup_irq;
  89         hose.config_table = pci_pip405_config_table;
  90 #ifdef DEBUG
  91         printf("Init PCI: fixup_irq=%p config_table=%p hose=%p\n",
  92                pci_pip405_fixup_irq, pci_pip405_config_table, hose);
  93 #endif
  94         pci_405gp_init(&hose);
  95 }
  96
  97 #endif /* CONFIG_PCI */
  98 #endif /* CONFIG_405GP */