arch/powerpc/platforms/pseries/pci.c

   1 /*
   2  * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
   3  * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
   4  *
   5  * pSeries specific routines for PCI.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22 #include <linux/init.h>
  23 #include <linux/ioport.h>
  24 #include <linux/kernel.h>
  25 #include <linux/pci.h>
  26 #include <linux/string.h>
  27
  28 #include <asm/eeh.h>
  29 #include <asm/pci-bridge.h>
  30 #include <asm/prom.h>
  31 #include <asm/ppc-pci.h>
  32
  33 #if 0
  34 void pcibios_name_device(struct pci_dev *dev)
  35 {
  36         struct device_node *dn;
  37
  38         /*
  39          * Add IBM loc code (slot) as a prefix to the device names for service
  40          */
  41         dn = pci_device_to_OF_node(dev);
  42         if (dn) {
  43                 const char *loc_code = of_get_property(dn, "ibm,loc-code", 0);
  44                 if (loc_code) {
  45                         int loc_len = strlen(loc_code);
  46                         if (loc_len < sizeof(dev->dev.name)) {
  47                                 memmove(dev->dev.name+loc_len+1, dev->dev.name,
  48                                         sizeof(dev->dev.name)-loc_len-1);
  49                                 memcpy(dev->dev.name, loc_code, loc_len);
  50                                 dev->dev.name[loc_len] = ' ';
  51                                 dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
  52                         }
  53                 }
  54         }
  55 }
  56 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
  57 #endif
  58
  59 static void __init pSeries_request_regions(void)
  60 {
  61         if (!isa_io_base)
  62                 return;
  63
  64         request_region(0x20,0x20,"pic1");
  65         request_region(0xa0,0x20,"pic2");
  66         request_region(0x00,0x20,"dma1");
  67         request_region(0x40,0x20,"timer");
  68         request_region(0x80,0x10,"dma page reg");
  69         request_region(0xc0,0x20,"dma2");
  70 }
  71
  72 void __init pSeries_final_fixup(void)
  73 {
  74         pSeries_request_regions();
  75
  76         pci_addr_cache_build();
  77 }
  78
  79 /*
  80  * Assume the winbond 82c105 is the IDE controller on a
  81  * p610/p615/p630. We should probably be more careful in case
  82  * someone tries to plug in a similar adapter.
  83  */
  84 static void fixup_winbond_82c105(struct pci_dev* dev)
  85 {
  86         int i;
  87         unsigned int reg;
  88
  89         if (!machine_is(pseries))
  90                 return;
  91
  92         printk("Using INTC for W82c105 IDE controller.\n");
  93         pci_read_config_dword(dev, 0x40, &reg);
  94         /* Enable LEGIRQ to use INTC instead of ISA interrupts */
  95         pci_write_config_dword(dev, 0x40, reg | (1<<11));
  96
  97         for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
  98                 /* zap the 2nd function of the winbond chip */
  99                 if (dev->resource[i].flags & IORESOURCE_IO
 100                     && dev->bus->number == 0 && dev->devfn == 0x81)
 101                         dev->resource[i].flags &= ~IORESOURCE_IO;
 102                 if (dev->resource[i].start == 0 && dev->resource[i].end) {
 103                         dev->resource[i].flags = 0;
 104                         dev->resource[i].end = 0;
 105                 }
 106         }
 107 }
 108 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
 109                          fixup_winbond_82c105);