release/src-rt-6.x.4708/linux/linux-2.6.36/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
  34 static void __init pSeries_request_regions(void)
  35 {
  36         if (!isa_io_base)
  37                 return;
  38
  39         request_region(0x20,0x20,"pic1");
  40         request_region(0xa0,0x20,"pic2");
  41         request_region(0x00,0x20,"dma1");
  42         request_region(0x40,0x20,"timer");
  43         request_region(0x80,0x10,"dma page reg");
  44         request_region(0xc0,0x20,"dma2");
  45 }
  46
  47 void __init pSeries_final_fixup(void)
  48 {
  49         pSeries_request_regions();
  50
  51         pci_addr_cache_build();
  52 }
  53
  54 /*
  55  * Assume the winbond 82c105 is the IDE controller on a
  56  * p610/p615/p630. We should probably be more careful in case
  57  * someone tries to plug in a similar adapter.
  58  */
  59 static void fixup_winbond_82c105(struct pci_dev* dev)
  60 {
  61         int i;
  62         unsigned int reg;
  63
  64         if (!machine_is(pseries))
  65                 return;
  66
  67         printk("Using INTC for W82c105 IDE controller.\n");
  68         pci_read_config_dword(dev, 0x40, &reg);
  69         /* Enable LEGIRQ to use INTC instead of ISA interrupts */
  70         pci_write_config_dword(dev, 0x40, reg | (1<<11));
  71
  72         for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
  73                 /* zap the 2nd function of the winbond chip */
  74                 if (dev->resource[i].flags & IORESOURCE_IO
  75                     && dev->bus->number == 0 && dev->devfn == 0x81)
  76                         dev->resource[i].flags &= ~IORESOURCE_IO;
  77                 if (dev->resource[i].start == 0 && dev->resource[i].end) {
  78                         dev->resource[i].flags = 0;
  79                         dev->resource[i].end = 0;
  80                 }
  81         }
  82 }
  83 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
  84                          fixup_winbond_82c105);