1 files changed, 93 insertions, 0 deletions
diff --git a/arch/mips/pci/ops-marvell.c b/arch/mips/pci/ops-marvell.c
new file mode 100644
index 000000000000..1ac5c59199d1
--- /dev/null
+++ b/arch/mips/pci/ops-marvell.c
@@ -0,0 +1,93 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003, 2004 Ralf Baechle (ralf@linux-mips.org)
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+
+#include <asm/marvell.h>
+
+static int mv_read_config(struct pci_bus *bus, unsigned int devfn,
+	int where, int size, u32 * val)
+{
+	struct mv_pci_controller *mvbc = bus->sysdata;
+	unsigned long address_reg, data_reg;
+	u32 address;
+
+	address_reg = mvbc->config_addr;
+	data_reg = mvbc->config_vreg;
+
+	/* Accessing device 31 crashes those Marvells.  Since years.
+	   Will they ever make sane controllers ... */
+	if (PCI_SLOT(devfn) == 31)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	address = (bus->number << 16) | (devfn << 8) |
+	          (where & 0xfc) | 0x80000000;
+
+	/* start the configuration cycle */
+	MV_WRITE(address_reg, address);
+
+	switch (size) {
+	case 1:
+		*val = MV_READ_8(data_reg + (where & 0x3));
+		break;
+
+	case 2:
+		*val = MV_READ_16(data_reg + (where & 0x3));
+		break;
+
+	case 4:
+		*val = MV_READ(data_reg);
+		break;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int mv_write_config(struct pci_bus *bus, unsigned int devfn,
+	int where, int size, u32 val)
+{
+	struct mv_pci_controller *mvbc = bus->sysdata;
+	unsigned long address_reg, data_reg;
+	u32 address;
+
+	address_reg = mvbc->config_addr;
+	data_reg = mvbc->config_vreg;
+
+	/* Accessing device 31 crashes those Marvells.  Since years.
+	   Will they ever make sane controllers ... */
+	if (PCI_SLOT(devfn) == 31)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	address = (bus->number << 16) | (devfn << 8) |
+	          (where & 0xfc) | 0x80000000;
+
+	/* start the configuration cycle */
+	MV_WRITE(address_reg, address);
+
+	switch (size) {
+	case 1:
+		MV_WRITE_8(data_reg + (where & 0x3), val);
+		break;
+
+	case 2:
+		MV_WRITE_16(data_reg + (where & 0x3), val);
+		break;
+
+	case 4:
+		MV_WRITE(data_reg, val);
+		break;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+struct pci_ops mv_pci_ops = {
+	.read	= mv_read_config,
+	.write	= mv_write_config
+};