patch-2.4.20 linux-2.4.20/arch/ppc/platforms/gemini_pci.c

• Lines: 123
• Date: Thu Nov 28 15:53:11 2002
• Orig file: linux-2.4.19/arch/ppc/platforms/gemini_pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/ppc/platforms/gemini_pci.c linux-2.4.20/arch/ppc/platforms/gemini_pci.c
@@ -0,0 +1,122 @@
+/*
+ * BK Id: %F% %I% %G% %U% %#%
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+
+#include <asm/machdep.h>
+#include <platforms/gemini.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pci-bridge.h>
+
+#define pci_config_addr(bus,dev,offset) \
+        (0x80000000 | (bus<<16) | (dev<<8) | offset)
+
+
+int
+gemini_pcibios_read_config_byte(struct pci_dev *dev, int offset, u8 *val)
+{
+	unsigned long reg;
+	reg = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
+					   (offset & ~(0x3))));
+	*val = ((reg >> ((offset & 0x3) << 3)) & 0xff);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int
+gemini_pcibios_read_config_word(struct pci_dev *dev, int offset, u16 *val)
+{
+	unsigned long reg;
+	reg = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
+					   (offset & ~(0x3))));
+	*val = ((reg >> ((offset & 0x3) << 3)) & 0xffff);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int
+gemini_pcibios_read_config_dword(struct pci_dev *dev, int offset, u32 *val)
+{
+	*val = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
+					    (offset & ~(0x3))));
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int
+gemini_pcibios_write_config_byte(struct pci_dev *dev, int offset, u8 val)
+{
+	unsigned long reg;
+	int shifts = offset & 0x3;
+	unsigned int addr = pci_config_addr(dev->bus->number, dev->devfn,
+					    (offset & ~(0x3)));
+
+	reg = grackle_read(addr);
+	reg = (reg & ~(0xff << (shifts << 3))) | (val << (shifts << 3));
+	grackle_write(addr, reg );
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int
+gemini_pcibios_write_config_word(struct pci_dev *dev, int offset, u16 val)
+{
+	unsigned long reg;
+	int shifts = offset & 0x3;
+	unsigned int addr = pci_config_addr(dev->bus->number, dev->devfn,
+					    (offset & ~(0x3)));
+
+	reg = grackle_read(addr);
+	reg = (reg & ~(0xffff << (shifts << 3))) | (val << (shifts << 3));
+	grackle_write(addr, reg );
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int
+gemini_pcibios_write_config_dword(struct pci_dev *dev, int offset, u32 val)
+{
+	grackle_write(pci_config_addr(dev->bus->number, dev->devfn,
+				      (offset & ~(0x3))), val);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops gemini_pci_ops =
+{
+	gemini_pcibios_read_config_byte,
+	gemini_pcibios_read_config_word,
+	gemini_pcibios_read_config_dword,
+	gemini_pcibios_write_config_byte,
+	gemini_pcibios_write_config_word,
+	gemini_pcibios_write_config_dword
+};
+
+void __init gemini_pcibios_fixup(void)
+{
+	int i;
+	struct pci_dev *dev;
+	
+	pci_for_each_dev(dev) {
+		for(i = 0; i < 6; i++) {
+			if (dev->resource[i].flags & IORESOURCE_IO) {
+				dev->resource[i].start |= (0xfe << 24);
+				dev->resource[i].end |= (0xfe << 24);
+			}
+		}
+	}
+}
+
+
+/* The "bootloader" for Synergy boards does none of this for us, so we need to
+   lay it all out ourselves... --Dan */
+void __init gemini_find_bridges(void)
+{
+	struct pci_controller* hose;
+	
+	ppc_md.pcibios_fixup = gemini_pcibios_fixup;
+
+	hose = pcibios_alloc_controller();
+	if (!hose)
+		return;
+	hose->ops = &gemini_pci_ops;
+}