[ARM] mv78xx0: Add Marvell RD-78x00-mASA Reference Design support
[linux-2.6] / arch / arm / mach-mv78xx0 / addr-map.c
1 /*
2  * arch/arm/mach-mv78xx0/addr-map.c
3  *
4  * Address map functions for Marvell MV78xx0 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>
15 #include "common.h"
16
17 /*
18  * Generic Address Decode Windows bit settings
19  */
20 #define TARGET_DDR              0
21 #define TARGET_DEV_BUS          1
22 #define TARGET_PCIE0            4
23 #define TARGET_PCIE1            8
24 #define TARGET_PCIE(i)          ((i) ? TARGET_PCIE1 : TARGET_PCIE0)
25 #define ATTR_DEV_SPI_ROM        0x1f
26 #define ATTR_DEV_BOOT           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(l)         (0xf0 & ~(0x10 << (l)))
32 #define ATTR_PCIE_MEM(l)        (0xf8 & ~(0x10 << (l)))
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 WIN0_OFF(n)             (BRIDGE_VIRT_BASE + 0x0000 + ((n) << 4))
44 #define WIN8_OFF(n)             (BRIDGE_VIRT_BASE + 0x0900 + (((n) - 8) << 4))
45 #define WIN_CTRL_OFF            0x0000
46 #define WIN_BASE_OFF            0x0004
47 #define WIN_REMAP_LO_OFF        0x0008
48 #define WIN_REMAP_HI_OFF        0x000c
49
50
51 struct mbus_dram_target_info mv78xx0_mbus_dram_info;
52
53 static void __init __iomem *win_cfg_base(int win)
54 {
55         /*
56          * Find the control register base address for this window.
57          *
58          * BRIDGE_VIRT_BASE points to the right (CPU0's or CPU1's)
59          * MBUS bridge depending on which CPU core we're running on,
60          * so we don't need to take that into account here.
61          */
62
63         return (void __iomem *)((win < 8) ? WIN0_OFF(win) : WIN8_OFF(win));
64 }
65
66 static int __init cpu_win_can_remap(int win)
67 {
68         if (win < 8)
69                 return 1;
70
71         return 0;
72 }
73
74 static void __init setup_cpu_win(int win, u32 base, u32 size,
75                                  u8 target, u8 attr, int remap)
76 {
77         void __iomem *addr = win_cfg_base(win);
78         u32 ctrl;
79
80         base &= 0xffff0000;
81         ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1;
82
83         writel(base, addr + WIN_BASE_OFF);
84         writel(ctrl, addr + WIN_CTRL_OFF);
85         if (cpu_win_can_remap(win)) {
86                 if (remap < 0)
87                         remap = base;
88
89                 writel(remap & 0xffff0000, addr + WIN_REMAP_LO_OFF);
90                 writel(0, addr + WIN_REMAP_HI_OFF);
91         }
92 }
93
94 void __init mv78xx0_setup_cpu_mbus(void)
95 {
96         void __iomem *addr;
97         int i;
98         int cs;
99
100         /*
101          * First, disable and clear windows.
102          */
103         for (i = 0; i < 14; i++) {
104                 addr = win_cfg_base(i);
105
106                 writel(0, addr + WIN_BASE_OFF);
107                 writel(0, addr + WIN_CTRL_OFF);
108                 if (cpu_win_can_remap(i)) {
109                         writel(0, addr + WIN_REMAP_LO_OFF);
110                         writel(0, addr + WIN_REMAP_HI_OFF);
111                 }
112         }
113
114         /*
115          * Setup MBUS dram target info.
116          */
117         mv78xx0_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
118
119         if (mv78xx0_core_index() == 0)
120                 addr = (void __iomem *)DDR_WINDOW_CPU0_BASE;
121         else
122                 addr = (void __iomem *)DDR_WINDOW_CPU1_BASE;
123
124         for (i = 0, cs = 0; i < 4; i++) {
125                 u32 base = readl(addr + DDR_BASE_CS_OFF(i));
126                 u32 size = readl(addr + DDR_SIZE_CS_OFF(i));
127
128                 /*
129                  * Chip select enabled?
130                  */
131                 if (size & 1) {
132                         struct mbus_dram_window *w;
133
134                         w = &mv78xx0_mbus_dram_info.cs[cs++];
135                         w->cs_index = i;
136                         w->mbus_attr = 0xf & ~(1 << i);
137                         w->base = base & 0xffff0000;
138                         w->size = (size | 0x0000ffff) + 1;
139                 }
140         }
141         mv78xx0_mbus_dram_info.num_cs = cs;
142 }
143
144 void __init mv78xx0_setup_pcie_io_win(int window, u32 base, u32 size,
145                                       int maj, int min)
146 {
147         setup_cpu_win(window, base, size, TARGET_PCIE(maj),
148                       ATTR_PCIE_IO(min), -1);
149 }
150
151 void __init mv78xx0_setup_pcie_mem_win(int window, u32 base, u32 size,
152                                        int maj, int min)
153 {
154         setup_cpu_win(window, base, size, TARGET_PCIE(maj),
155                       ATTR_PCIE_MEM(min), -1);
156 }