1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*
* arch/arm/mach-orion5x/addr-map.c
*
* Address map functions for Marvell Orion 5x SoCs
*
* Maintainer: Tzachi Perelstein <tzachi@marvell.com>
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mbus.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include "common.h"
/*
* The Orion has fully programable address map. There's a separate address
* map for each of the device _master_ interfaces, e.g. CPU, PCI, PCIe, USB,
* Gigabit Ethernet, DMA/XOR engines, etc. Each interface has its own
* address decode windows that allow it to access any of the Orion resources.
*
* CPU address decoding --
* Linux assumes that it is the boot loader that already setup the access to
* DDR and internal registers.
* Setup access to PCI and PCIe IO/MEM space is issued by this file.
* Setup access to various devices located on the device bus interface (e.g.
* flashes, RTC, etc) should be issued by machine-setup.c according to
* specific board population (by using orion5x_setup_*_win()).
*
* Non-CPU Masters address decoding --
* Unlike the CPU, we setup the access from Orion's master interfaces to DDR
* banks only (the typical use case).
* Setup access for each master to DDR is issued by platform device setup.
*/
/*
* Generic Address Decode Windows bit settings
*/
#define TARGET_DDR 0
#define TARGET_DEV_BUS 1
#define TARGET_PCI 3
#define TARGET_PCIE 4
#define ATTR_PCIE_MEM 0x59
#define ATTR_PCIE_IO 0x51
#define ATTR_PCIE_WA 0x79
#define ATTR_PCI_MEM 0x59
#define ATTR_PCI_IO 0x51
#define ATTR_DEV_CS0 0x1e
#define ATTR_DEV_CS1 0x1d
#define ATTR_DEV_CS2 0x1b
#define ATTR_DEV_BOOT 0xf
/*
* Helpers to get DDR bank info
*/
#define DDR_BASE_CS(n) ORION5X_DDR_REG(0x1500 + ((n) << 3))
#define DDR_SIZE_CS(n) ORION5X_DDR_REG(0x1504 + ((n) << 3))
/*
* CPU Address Decode Windows registers
*/
#define CPU_WIN_CTRL(n) ORION5X_BRIDGE_REG(0x000 | ((n) << 4))
#define CPU_WIN_BASE(n) ORION5X_BRIDGE_REG(0x004 | ((n) << 4))
#define CPU_WIN_REMAP_LO(n) ORION5X_BRIDGE_REG(0x008 | ((n) << 4))
#define CPU_WIN_REMAP_HI(n) ORION5X_BRIDGE_REG(0x00c | ((n) << 4))
struct mbus_dram_target_info orion5x_mbus_dram_info;
static int __initdata win_alloc_count;
static int __init orion5x_cpu_win_can_remap(int win)
{
u32 dev, rev;
orion5x_pcie_id(&dev, &rev);
if ((dev == MV88F5281_DEV_ID && win < 4)
|| (dev == MV88F5182_DEV_ID && win < 2)
|| (dev == MV88F5181_DEV_ID && win < 2))
return 1;
return 0;
}
static void __init setup_cpu_win(int win, u32 base, u32 size,
u8 target, u8 attr, int remap)
{
if (win >= 8) {
printk(KERN_ERR "setup_cpu_win: trying to allocate "
"window %d\n", win);
return;
}
writel(base & 0xffff0000, CPU_WIN_BASE(win));
writel(((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1,
CPU_WIN_CTRL(win));
if (orion5x_cpu_win_can_remap(win)) {
if (remap < 0)
remap = base;
writel(remap & 0xffff0000, CPU_WIN_REMAP_LO(win));
writel(0, CPU_WIN_REMAP_HI(win));
}
}
void __init orion5x_setup_cpu_mbus_bridge(void)
{
int i;
int cs;
/*
* First, disable and clear windows.
*/
for (i = 0; i < 8; i++) {
writel(0, CPU_WIN_BASE(i));
writel(0, CPU_WIN_CTRL(i));
if (orion5x_cpu_win_can_remap(i)) {
writel(0, CPU_WIN_REMAP_LO(i));
writel(0, CPU_WIN_REMAP_HI(i));
}
}
/*
* Setup windows for PCI+PCIe IO+MEM space.
*/
setup_cpu_win(0, ORION5X_PCIE_IO_PHYS_BASE, ORION5X_PCIE_IO_SIZE,
TARGET_PCIE, ATTR_PCIE_IO, ORION5X_PCIE_IO_BUS_BASE);
setup_cpu_win(1, ORION5X_PCI_IO_PHYS_BASE, ORION5X_PCI_IO_SIZE,
TARGET_PCI, ATTR_PCI_IO, ORION5X_PCI_IO_BUS_BASE);
setup_cpu_win(2, ORION5X_PCIE_MEM_PHYS_BASE, ORION5X_PCIE_MEM_SIZE,
TARGET_PCIE, ATTR_PCIE_MEM, -1);
setup_cpu_win(3, ORION5X_PCI_MEM_PHYS_BASE, ORION5X_PCI_MEM_SIZE,
TARGET_PCI, ATTR_PCI_MEM, -1);
win_alloc_count = 4;
/*
* Setup MBUS dram target info.
*/
orion5x_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
for (i = 0, cs = 0; i < 4; i++) {
u32 base = readl(DDR_BASE_CS(i));
u32 size = readl(DDR_SIZE_CS(i));
/*
* Chip select enabled?
*/
if (size & 1) {
struct mbus_dram_window *w;
w = &orion5x_mbus_dram_info.cs[cs++];
w->cs_index = i;
w->mbus_attr = 0xf & ~(1 << i);
w->base = base & 0xffff0000;
w->size = (size | 0x0000ffff) + 1;
}
}
orion5x_mbus_dram_info.num_cs = cs;
}
void __init orion5x_setup_dev_boot_win(u32 base, u32 size)
{
setup_cpu_win(win_alloc_count++, base, size,
TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
}
void __init orion5x_setup_dev0_win(u32 base, u32 size)
{
setup_cpu_win(win_alloc_count++, base, size,
TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
}
void __init orion5x_setup_dev1_win(u32 base, u32 size)
{
setup_cpu_win(win_alloc_count++, base, size,
TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
}
void __init orion5x_setup_dev2_win(u32 base, u32 size)
{
setup_cpu_win(win_alloc_count++, base, size,
TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
}
void __init orion5x_setup_pcie_wa_win(u32 base, u32 size)
{
setup_cpu_win(win_alloc_count++, base, size,
TARGET_PCIE, ATTR_PCIE_WA, -1);
}
|
