2 * arch/ppc64/kernel/pSeries_pci.c
4 * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
7 * pSeries specific routines for PCI.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/init.h>
25 #include <linux/ioport.h>
26 #include <linux/kernel.h>
27 #include <linux/pci.h>
28 #include <linux/string.h>
30 #include <asm/pci-bridge.h>
32 #include <asm/ppc-pci.h>
34 static int __devinitdata s7a_workaround = -1;
37 void pcibios_name_device(struct pci_dev *dev)
39 struct device_node *dn;
42 * Add IBM loc code (slot) as a prefix to the device names for service
44 dn = pci_device_to_OF_node(dev);
46 char *loc_code = get_property(dn, "ibm,loc-code", 0);
48 int loc_len = strlen(loc_code);
49 if (loc_len < sizeof(dev->dev.name)) {
50 memmove(dev->dev.name+loc_len+1, dev->dev.name,
51 sizeof(dev->dev.name)-loc_len-1);
52 memcpy(dev->dev.name, loc_code, loc_len);
53 dev->dev.name[loc_len] = ' ';
54 dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
59 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
62 static void __devinit check_s7a(void)
64 struct device_node *root;
68 root = of_find_node_by_path("/");
70 model = get_property(root, "model", NULL);
71 if (model && !strcmp(model, "IBM,7013-S7A"))
77 void __devinit pSeries_irq_bus_setup(struct pci_bus *bus)
81 if (s7a_workaround < 0)
83 list_for_each_entry(dev, &bus->devices, bus_list) {
84 pci_read_irq_line(dev);
88 pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
95 static void __init pSeries_request_regions(void)
100 request_region(0x20,0x20,"pic1");
101 request_region(0xa0,0x20,"pic2");
102 request_region(0x00,0x20,"dma1");
103 request_region(0x40,0x20,"timer");
104 request_region(0x80,0x10,"dma page reg");
105 request_region(0xc0,0x20,"dma2");
108 void __init pSeries_final_fixup(void)
110 pSeries_request_regions();
112 pci_addr_cache_build();
116 * Assume the winbond 82c105 is the IDE controller on a
117 * p610. We should probably be more careful in case
118 * someone tries to plug in a similar adapter.
120 static void fixup_winbond_82c105(struct pci_dev* dev)
125 if (!platform_is_pseries())
128 printk("Using INTC for W82c105 IDE controller.\n");
129 pci_read_config_dword(dev, 0x40, ®);
130 /* Enable LEGIRQ to use INTC instead of ISA interrupts */
131 pci_write_config_dword(dev, 0x40, reg | (1<<11));
133 for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
134 /* zap the 2nd function of the winbond chip */
135 if (dev->resource[i].flags & IORESOURCE_IO
136 && dev->bus->number == 0 && dev->devfn == 0x81)
137 dev->resource[i].flags &= ~IORESOURCE_IO;
140 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
141 fixup_winbond_82c105);