LXR linux/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
  34void 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}   
  56DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
  57#endif
  58
  59static 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
  72void __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 */
  84static 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}
 108DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
 109                         fixup_winbond_82c105);
 110