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Stefan Roese24c04972014-10-22 12:13:09 +02001/*
2 * Marvell MBUS common definitions.
3 *
4 * Copyright (C) 2008 Marvell Semiconductor
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10
11#ifndef __LINUX_MBUS_H
12#define __LINUX_MBUS_H
13
14struct resource;
15
16struct mbus_dram_target_info {
17 /*
18 * The 4-bit MBUS target ID of the DRAM controller.
19 */
20 u8 mbus_dram_target_id;
21
22 /*
23 * The base address, size, and MBUS attribute ID for each
24 * of the possible DRAM chip selects. Peripherals are
25 * required to support at least 4 decode windows.
26 */
27 int num_cs;
28 struct mbus_dram_window {
29 u8 cs_index;
30 u8 mbus_attr;
31 u32 base;
32 u32 size;
33 } cs[4];
34};
35
36struct mvebu_mbus_state {
37 void __iomem *mbuswins_base;
38 void __iomem *sdramwins_base;
39 struct dentry *debugfs_root;
40 struct dentry *debugfs_sdram;
41 struct dentry *debugfs_devs;
42 const struct mvebu_mbus_soc_data *soc;
43 int hw_io_coherency;
44};
45
46/* Flags for PCI/PCIe address decoding regions */
47#define MVEBU_MBUS_PCI_IO 0x1
48#define MVEBU_MBUS_PCI_MEM 0x2
49#define MVEBU_MBUS_PCI_WA 0x3
50
51/*
52 * Magic value that explicits that we don't need a remapping-capable
53 * address decoding window.
54 */
55#define MVEBU_MBUS_NO_REMAP (0xffffffff)
56
57/* Maximum size of a mbus window name */
58#define MVEBU_MBUS_MAX_WINNAME_SZ 32
59
60const struct mbus_dram_target_info *mvebu_mbus_dram_info(void);
61void mvebu_mbus_get_pcie_mem_aperture(struct resource *res);
62void mvebu_mbus_get_pcie_io_aperture(struct resource *res);
63int mvebu_mbus_add_window_remap_by_id(unsigned int target,
64 unsigned int attribute,
65 phys_addr_t base, size_t size,
66 phys_addr_t remap);
67int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
68 phys_addr_t base, size_t size);
69int mvebu_mbus_del_window(phys_addr_t base, size_t size);
70int mbus_dt_setup_win(struct mvebu_mbus_state *mbus,
71 u32 base, u32 size, u8 target, u8 attr);
72
73#endif /* __LINUX_MBUS_H */