bus: mvebu: add mbus driver

This imports the Marvell mbus driver from Linux. The mbus is the
main downstream bus found on all Marvell Orion SoCs. The driver
deals with re-configurable address windows which are currently
parsed from DT. Also enable the driver as default on all MVEBU
SoCs. While at it, also reorder drivers/bus/{Kconfig,Makefile}
alphabetically.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 61 insertions, 0 deletions

diff --git a/include/linux/mbus.h b/include/linux/mbus.h
new file mode 100644
index 0000000000..578ff33146
--- /dev/null
+++ b/include/linux/mbus.h
@@ -0,0 +1,61 @@
+/*
+ * Marvell MBUS common definitions.
+ *
+ * Copyright (C) 2008 Marvell Semiconductor
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __LINUX_MBUS_H
+#define __LINUX_MBUS_H
+
+struct resource;
+
+struct mbus_dram_target_info {
+	/*
+	 * The 4-bit MBUS target ID of the DRAM controller.
+	 */
+	u8		mbus_dram_target_id;
+
+	/*
+	 * The base address, size, and MBUS attribute ID for each
+	 * of the possible DRAM chip selects.  Peripherals are
+	 * required to support at least 4 decode windows.
+	 */
+	int		num_cs;
+	struct mbus_dram_window {
+		u8	cs_index;
+		u8	mbus_attr;
+		u32	base;
+		u32	size;
+	} cs[4];
+};
+
+/* Flags for PCI/PCIe address decoding regions */
+#define MVEBU_MBUS_PCI_IO  0x1
+#define MVEBU_MBUS_PCI_MEM 0x2
+#define MVEBU_MBUS_PCI_WA  0x3
+
+/*
+ * Magic value that explicits that we don't need a remapping-capable
+ * address decoding window.
+ */
+#define MVEBU_MBUS_NO_REMAP (0xffffffff)
+
+/* Maximum size of a mbus window name */
+#define MVEBU_MBUS_MAX_WINNAME_SZ 32
+
+const struct mbus_dram_target_info *mvebu_mbus_dram_info(void);
+void mvebu_mbus_get_pcie_mem_aperture(struct resource *res);
+void mvebu_mbus_get_pcie_io_aperture(struct resource *res);
+int mvebu_mbus_add_window_remap_by_id(unsigned int target,
+				      unsigned int attribute,
+				      phys_addr_t base, size_t size,
+				      phys_addr_t remap);
+int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
+				phys_addr_t base, size_t size);
+int mvebu_mbus_del_window(phys_addr_t base, size_t size);
+
+#endif /* __LINUX_MBUS_H */