pci.c

Go to the documentation of this file.

/*
 * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
 * Copyright (C) 2003 Anton Blanchard <[email protected]>, IBM
 *
 * pSeries specific routines for PCI.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *    
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/string.h>

#include <asm/eeh.h>
#include <asm/pci-bridge.h>
#include <asm/prom.h>
#include <asm/ppc-pci.h>

#if 0
void pcibios_name_device(struct pci_dev *dev)
{
    struct device_node *dn;

    /*
     * Add IBM loc code (slot) as a prefix to the device names for service
     */
    dn = pci_device_to_OF_node(dev);
    if (dn) {
        const char *loc_code = of_get_property(dn, "ibm,loc-code", 0);
        if (loc_code) {
            int loc_len = strlen(loc_code);
            if (loc_len < sizeof(dev->dev.name)) {
                memmove(dev->dev.name+loc_len+1, dev->dev.name,
                    sizeof(dev->dev.name)-loc_len-1);
                memcpy(dev->dev.name, loc_code, loc_len);
                dev->dev.name[loc_len] = ' ';
                dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
            }
        }
    }
}   
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
#endif

static void __init pSeries_request_regions(void)
{
    if (!isa_io_base)
        return;

    request_region(0x20,0x20,"pic1");
    request_region(0xa0,0x20,"pic2");
    request_region(0x00,0x20,"dma1");
    request_region(0x40,0x20,"timer");
    request_region(0x80,0x10,"dma page reg");
    request_region(0xc0,0x20,"dma2");
}

void __init pSeries_final_fixup(void)
{
    pSeries_request_regions();

    eeh_addr_cache_build();
}

/*
 * Assume the winbond 82c105 is the IDE controller on a
 * p610/p615/p630. We should probably be more careful in case
 * someone tries to plug in a similar adapter.
 */
static void fixup_winbond_82c105(struct pci_dev* dev)
{
    int i;
    unsigned int reg;

    if (!machine_is(pseries))
        return;

    printk("Using INTC for W82c105 IDE controller.\n");
    pci_read_config_dword(dev, 0x40, &reg);
    /* Enable LEGIRQ to use INTC instead of ISA interrupts */
    pci_write_config_dword(dev, 0x40, reg | (1<<11));

    for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
        /* zap the 2nd function of the winbond chip */
        if (dev->resource[i].flags & IORESOURCE_IO
            && dev->bus->number == 0 && dev->devfn == 0x81)
            dev->resource[i].flags &= ~IORESOURCE_IO;
        if (dev->resource[i].start == 0 && dev->resource[i].end) {
            dev->resource[i].flags = 0;
            dev->resource[i].end = 0;
        }
    }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
             fixup_winbond_82c105);