summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/pseries/pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/platforms/pseries/pci.c')
-rw-r--r--arch/powerpc/platforms/pseries/pci.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
new file mode 100644
index 00000000000..c198656a3bb
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/pci.c
@@ -0,0 +1,142 @@
+/*
+ * arch/ppc64/kernel/pSeries_pci.c
+ *
+ * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
+ * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, 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/pci-bridge.h>
+#include <asm/prom.h>
+#include <asm/ppc-pci.h>
+
+static int __devinitdata s7a_workaround = -1;
+
+#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) {
+ char *loc_code = 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 __devinit check_s7a(void)
+{
+ struct device_node *root;
+ char *model;
+
+ s7a_workaround = 0;
+ root = of_find_node_by_path("/");
+ if (root) {
+ model = get_property(root, "model", NULL);
+ if (model && !strcmp(model, "IBM,7013-S7A"))
+ s7a_workaround = 1;
+ of_node_put(root);
+ }
+}
+
+void __devinit pSeries_irq_bus_setup(struct pci_bus *bus)
+{
+ struct pci_dev *dev;
+
+ if (s7a_workaround < 0)
+ check_s7a();
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ pci_read_irq_line(dev);
+ if (s7a_workaround) {
+ if (dev->irq > 16) {
+ dev->irq -= 3;
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
+ dev->irq);
+ }
+ }
+ }
+}
+
+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)
+{
+ phbs_remap_io();
+ pSeries_request_regions();
+
+ pci_addr_cache_build();
+}
+
+/*
+ * Assume the winbond 82c105 is the IDE controller on a
+ * p610. 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 (!(systemcfg->platform & PLATFORM_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;
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
+ fixup_winbond_82c105);