142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/*
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* arch/ppc64/kernel/pSeries_pci.c
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*
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* Copyright (C) 2001 Dave Engebretsen, IBM Corporation
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* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
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*
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* pSeries specific routines for PCI.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/string.h>
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#include <asm/pci-bridge.h>
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#include <asm/prom.h>
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#include <asm/ppc-pci.h>
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static int __initdata s7a_workaround = -1;
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#if 0
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void pcibios_name_device(struct pci_dev *dev)
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{
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struct device_node *dn;
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/*
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* Add IBM loc code (slot) as a prefix to the device names for service
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*/
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dn = pci_device_to_OF_node(dev);
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if (dn) {
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char *loc_code = get_property(dn, "ibm,loc-code", 0);
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if (loc_code) {
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int loc_len = strlen(loc_code);
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if (loc_len < sizeof(dev->dev.name)) {
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memmove(dev->dev.name+loc_len+1, dev->dev.name,
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sizeof(dev->dev.name)-loc_len-1);
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memcpy(dev->dev.name, loc_code, loc_len);
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dev->dev.name[loc_len] = ' ';
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dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
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}
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}
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}
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
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#endif
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static void __init check_s7a(void)
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{
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struct device_node *root;
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char *model;
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s7a_workaround = 0;
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root = of_find_node_by_path("/");
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if (root) {
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model = get_property(root, "model", NULL);
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if (model && !strcmp(model, "IBM,7013-S7A"))
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s7a_workaround = 1;
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of_node_put(root);
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}
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}
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void __devinit pSeries_irq_bus_setup(struct pci_bus *bus)
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{
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struct pci_dev *dev;
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if (s7a_workaround < 0)
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check_s7a();
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list_for_each_entry(dev, &bus->devices, bus_list) {
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pci_read_irq_line(dev);
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if (s7a_workaround) {
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if (dev->irq > 16) {
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dev->irq -= 3;
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pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
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dev->irq);
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}
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}
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}
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}
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static void __init pSeries_request_regions(void)
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{
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if (!isa_io_base)
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return;
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request_region(0x20,0x20,"pic1");
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request_region(0xa0,0x20,"pic2");
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request_region(0x00,0x20,"dma1");
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request_region(0x40,0x20,"timer");
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request_region(0x80,0x10,"dma page reg");
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request_region(0xc0,0x20,"dma2");
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}
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void __init pSeries_final_fixup(void)
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{
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phbs_remap_io();
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pSeries_request_regions();
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pci_addr_cache_build();
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}
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/*
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* Assume the winbond 82c105 is the IDE controller on a
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* p610. We should probably be more careful in case
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* someone tries to plug in a similar adapter.
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*/
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static void fixup_winbond_82c105(struct pci_dev* dev)
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{
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int i;
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unsigned int reg;
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if (!(systemcfg->platform & PLATFORM_PSERIES))
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return;
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printk("Using INTC for W82c105 IDE controller.\n");
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pci_read_config_dword(dev, 0x40, ®);
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/* Enable LEGIRQ to use INTC instead of ISA interrupts */
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pci_write_config_dword(dev, 0x40, reg | (1<<11));
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for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
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/* zap the 2nd function of the winbond chip */
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if (dev->resource[i].flags & IORESOURCE_IO
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&& dev->bus->number == 0 && dev->devfn == 0x81)
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dev->resource[i].flags &= ~IORESOURCE_IO;
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}
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
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fixup_winbond_82c105);
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