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651c74c7 SB |
1 | /* |
2 | * arch/arm/mach-kirkwood/addr-map.c | |
3 | * | |
4 | * Address map functions for Marvell Kirkwood SoCs | |
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 | #include <linux/kernel.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/mbus.h> | |
14 | #include <linux/io.h> | |
a09e64fb | 15 | #include <mach/hardware.h> |
651c74c7 SB |
16 | #include "common.h" |
17 | ||
18 | /* | |
19 | * Generic Address Decode Windows bit settings | |
20 | */ | |
21 | #define TARGET_DDR 0 | |
22 | #define TARGET_DEV_BUS 1 | |
23 | #define TARGET_PCIE 4 | |
24 | #define ATTR_DEV_SPI_ROM 0x1e | |
25 | #define ATTR_DEV_BOOT 0x1d | |
26 | #define ATTR_DEV_NAND 0x2f | |
27 | #define ATTR_DEV_CS3 0x37 | |
28 | #define ATTR_DEV_CS2 0x3b | |
29 | #define ATTR_DEV_CS1 0x3d | |
30 | #define ATTR_DEV_CS0 0x3e | |
31 | #define ATTR_PCIE_IO 0xe0 | |
32 | #define ATTR_PCIE_MEM 0xe8 | |
33 | ||
34 | /* | |
35 | * Helpers to get DDR bank info | |
36 | */ | |
37 | #define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3)) | |
38 | #define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3)) | |
39 | ||
40 | /* | |
41 | * CPU Address Decode Windows registers | |
42 | */ | |
43 | #define WIN_OFF(n) (BRIDGE_VIRT_BASE + 0x0000 + ((n) << 4)) | |
44 | #define WIN_CTRL_OFF 0x0000 | |
45 | #define WIN_BASE_OFF 0x0004 | |
46 | #define WIN_REMAP_LO_OFF 0x0008 | |
47 | #define WIN_REMAP_HI_OFF 0x000c | |
48 | ||
49 | ||
50 | struct mbus_dram_target_info kirkwood_mbus_dram_info; | |
51 | ||
52 | static int __init cpu_win_can_remap(int win) | |
53 | { | |
54 | if (win < 4) | |
55 | return 1; | |
56 | ||
57 | return 0; | |
58 | } | |
59 | ||
60 | static void __init setup_cpu_win(int win, u32 base, u32 size, | |
61 | u8 target, u8 attr, int remap) | |
62 | { | |
63 | void __iomem *addr = (void __iomem *)WIN_OFF(win); | |
64 | u32 ctrl; | |
65 | ||
66 | base &= 0xffff0000; | |
67 | ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1; | |
68 | ||
69 | writel(base, addr + WIN_BASE_OFF); | |
70 | writel(ctrl, addr + WIN_CTRL_OFF); | |
71 | if (cpu_win_can_remap(win)) { | |
72 | if (remap < 0) | |
73 | remap = base; | |
74 | ||
75 | writel(remap & 0xffff0000, addr + WIN_REMAP_LO_OFF); | |
76 | writel(0, addr + WIN_REMAP_HI_OFF); | |
77 | } | |
78 | } | |
79 | ||
80 | void __init kirkwood_setup_cpu_mbus(void) | |
81 | { | |
82 | void __iomem *addr; | |
83 | int i; | |
84 | int cs; | |
85 | ||
86 | /* | |
87 | * First, disable and clear windows. | |
88 | */ | |
89 | for (i = 0; i < 8; i++) { | |
90 | addr = (void __iomem *)WIN_OFF(i); | |
91 | ||
92 | writel(0, addr + WIN_BASE_OFF); | |
93 | writel(0, addr + WIN_CTRL_OFF); | |
94 | if (cpu_win_can_remap(i)) { | |
95 | writel(0, addr + WIN_REMAP_LO_OFF); | |
96 | writel(0, addr + WIN_REMAP_HI_OFF); | |
97 | } | |
98 | } | |
99 | ||
100 | /* | |
101 | * Setup windows for PCIe IO+MEM space. | |
102 | */ | |
103 | setup_cpu_win(0, KIRKWOOD_PCIE_IO_PHYS_BASE, KIRKWOOD_PCIE_IO_SIZE, | |
104 | TARGET_PCIE, ATTR_PCIE_IO, KIRKWOOD_PCIE_IO_BUS_BASE); | |
105 | setup_cpu_win(1, KIRKWOOD_PCIE_MEM_PHYS_BASE, KIRKWOOD_PCIE_MEM_SIZE, | |
106 | TARGET_PCIE, ATTR_PCIE_MEM, -1); | |
107 | ||
108 | /* | |
109 | * Setup window for NAND controller. | |
110 | */ | |
111 | setup_cpu_win(2, KIRKWOOD_NAND_MEM_PHYS_BASE, KIRKWOOD_NAND_MEM_SIZE, | |
112 | TARGET_DEV_BUS, ATTR_DEV_NAND, -1); | |
113 | ||
114 | /* | |
115 | * Setup MBUS dram target info. | |
116 | */ | |
117 | kirkwood_mbus_dram_info.mbus_dram_target_id = TARGET_DDR; | |
118 | ||
119 | addr = (void __iomem *)DDR_WINDOW_CPU_BASE; | |
120 | ||
121 | for (i = 0, cs = 0; i < 4; i++) { | |
122 | u32 base = readl(addr + DDR_BASE_CS_OFF(i)); | |
123 | u32 size = readl(addr + DDR_SIZE_CS_OFF(i)); | |
124 | ||
125 | /* | |
126 | * Chip select enabled? | |
127 | */ | |
128 | if (size & 1) { | |
129 | struct mbus_dram_window *w; | |
130 | ||
131 | w = &kirkwood_mbus_dram_info.cs[cs++]; | |
132 | w->cs_index = i; | |
133 | w->mbus_attr = 0xf & ~(1 << i); | |
134 | w->base = base & 0xffff0000; | |
135 | w->size = (size | 0x0000ffff) + 1; | |
136 | } | |
137 | } | |
138 | kirkwood_mbus_dram_info.num_cs = cs; | |
139 | } |