1 files changed, 157 insertions, 0 deletions
diff --git a/arch/arm/kernel/dec21285.c b/arch/arm/kernel/dec21285.c
new file mode 100644
index 000000000..11ea39e7a
--- /dev/null
+++ b/arch/arm/kernel/dec21285.c
@@ -0,0 +1,157 @@
+/*
+ * arch/arm/kernel/dec21285.c: PCI functions for DEC 21285
+ *
+ * Copyright (C) 1998 Russell King
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+int pcibios_present(void)
+{
+	return 1;
+}
+
+static unsigned long pcibios_base_address(unsigned char dev_fn)
+{
+	int slot = PCI_SLOT(dev_fn);
+
+	if (slot < 4)
+		return 0xf8000000 + (1 << (19 - slot));
+	else
+		return 0;
+}
+
+int pcibios_read_config_byte(unsigned char bus, unsigned char dev_fn,
+			     unsigned char where, unsigned char *val)
+{
+	unsigned long addr = pcibios_base_address(dev_fn);
+	unsigned char v;
+
+	if (addr)
+		__asm__("ldr%?b	%0, [%1, %2]"
+			: "=r" (v)
+			: "r" (addr), "r" (where));
+	else
+		v = 0xff;
+	*val = v;
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int pcibios_read_config_word(unsigned char bus, unsigned char dev_fn,
+			     unsigned char where, unsigned short *val)
+{
+	unsigned long addr = pcibios_base_address(dev_fn);
+	unsigned short v;
+
+	if (addr)
+		__asm__("ldr%?h	%0, [%1, %2]"
+			: "=r" (v)
+			: "r" (addr), "r" (where));
+	else
+		v = 0xffff;
+	*val = v;
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int pcibios_read_config_dword(unsigned char bus, unsigned char dev_fn,
+			      unsigned char where, unsigned int *val)
+{
+	unsigned long addr = pcibios_base_address(dev_fn);
+	unsigned int v;
+
+	if (addr)
+		__asm__("ldr%?	%0, [%1, %2]"
+			: "=r" (v)
+			: "r" (addr), "r" (where));
+	else
+		v = 0xffffffff;
+	*val = v;
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int pcibios_write_config_byte(unsigned char bus, unsigned char dev_fn,
+			     unsigned char where, unsigned char val)
+{
+	unsigned long addr = pcibios_base_address(dev_fn);
+
+	if (addr)
+		__asm__("str%?b	%0, [%1, %2]"
+			: : "r" (val), "r" (addr), "r" (where));
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int pcibios_write_config_word(unsigned char bus, unsigned char dev_fn,
+			      unsigned char where, unsigned short val)
+{
+	unsigned long addr = pcibios_base_address(dev_fn);
+
+	if (addr)
+		__asm__("str%?h	%0, [%1, %2]"
+			: : "r" (val), "r" (addr), "r" (where));
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int pcibios_write_config_dword(unsigned char bus, unsigned char dev_fn,
+			       unsigned char where, unsigned int val)
+{
+	unsigned long addr = pcibios_base_address(dev_fn);
+
+	if (addr)
+		__asm__("str%?	%0, [%1, %2]"
+			: : "r" (val), "r" (addr), "r" (where));
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int irq[] = { 18, 8, 9, 11 };
+
+__initfunc(void pcibios_fixup(void))
+{
+	struct pci_dev *dev;
+	unsigned char pin;
+	unsigned int cmd;
+
+	for (dev = pci_devices; dev; dev = dev->next) {
+		pcibios_read_config_byte(dev->bus->number,
+					 dev->devfn,
+					 PCI_INTERRUPT_PIN,
+					 &pin);
+
+		dev->irq = irq[(PCI_SLOT(dev->devfn) + pin) & 3];
+
+		pcibios_write_config_byte(dev->bus->number,
+					  dev->devfn,
+					  PCI_INTERRUPT_LINE,
+					  dev->irq);
+
+		printk("PCI: %02x:%02x [%04x/%04x] pin %d irq %d\n",
+			dev->bus->number, dev->devfn,
+			dev->vendor, dev->device,
+			pin, dev->irq);
+
+		/* Turn on bus mastering - boot loader doesn't - perhaps it should! */
+		pcibios_read_config_byte(dev->bus->number, dev->devfn, PCI_COMMAND, &cmd);
+		pcibios_write_config_byte(dev->bus->number, dev->devfn, PCI_COMMAND, cmd | PCI_COMMAND_MASTER);
+	}
+}
+
+__initfunc(void pcibios_init(void))
+{
+	int rev;
+
+	rev = *(unsigned char *)0xfe000008;
+	printk("DEC21285 PCI revision %02X\n", rev);
+}
+
+__initfunc(void pcibios_fixup_bus(struct pci_bus *bus))
+{
+}
+
+__initfunc(void pcibios_fixup_bus(struct pci_bus *bus))
+{
+}
+
+__initfunc(char *pcibios_setup(char *str))
+{
+	return str;
+}