2 * arch/arm/mach-orion5x/addr-map.c
4 * Address map functions for Marvell Orion 5x SoCs
6 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/mbus.h>
16 #include <asm/hardware.h>
21 * The Orion has fully programable address map. There's a separate address
22 * map for each of the device _master_ interfaces, e.g. CPU, PCI, PCIe, USB,
23 * Gigabit Ethernet, DMA/XOR engines, etc. Each interface has its own
24 * address decode windows that allow it to access any of the Orion resources.
26 * CPU address decoding --
27 * Linux assumes that it is the boot loader that already setup the access to
28 * DDR and internal registers.
29 * Setup access to PCI and PCIe IO/MEM space is issued by this file.
30 * Setup access to various devices located on the device bus interface (e.g.
31 * flashes, RTC, etc) should be issued by machine-setup.c according to
32 * specific board population (by using orion5x_setup_*_win()).
34 * Non-CPU Masters address decoding --
35 * Unlike the CPU, we setup the access from Orion's master interfaces to DDR
36 * banks only (the typical use case).
37 * Setup access for each master to DDR is issued by platform device setup.
41 * Generic Address Decode Windows bit settings
44 #define TARGET_DEV_BUS 1
47 #define ATTR_PCIE_MEM 0x59
48 #define ATTR_PCIE_IO 0x51
49 #define ATTR_PCIE_WA 0x79
50 #define ATTR_PCI_MEM 0x59
51 #define ATTR_PCI_IO 0x51
52 #define ATTR_DEV_CS0 0x1e
53 #define ATTR_DEV_CS1 0x1d
54 #define ATTR_DEV_CS2 0x1b
55 #define ATTR_DEV_BOOT 0xf
58 * Helpers to get DDR bank info
60 #define DDR_BASE_CS(n) ORION5X_DDR_REG(0x1500 + ((n) << 3))
61 #define DDR_SIZE_CS(n) ORION5X_DDR_REG(0x1504 + ((n) << 3))
64 * CPU Address Decode Windows registers
66 #define CPU_WIN_CTRL(n) ORION5X_BRIDGE_REG(0x000 | ((n) << 4))
67 #define CPU_WIN_BASE(n) ORION5X_BRIDGE_REG(0x004 | ((n) << 4))
68 #define CPU_WIN_REMAP_LO(n) ORION5X_BRIDGE_REG(0x008 | ((n) << 4))
69 #define CPU_WIN_REMAP_HI(n) ORION5X_BRIDGE_REG(0x00c | ((n) << 4))
72 struct mbus_dram_target_info orion5x_mbus_dram_info;
74 static int __init orion5x_cpu_win_can_remap(int win)
78 orion5x_pcie_id(&dev, &rev);
79 if ((dev == MV88F5281_DEV_ID && win < 4)
80 || (dev == MV88F5182_DEV_ID && win < 2)
81 || (dev == MV88F5181_DEV_ID && win < 2))
87 static void __init setup_cpu_win(int win, u32 base, u32 size,
88 u8 target, u8 attr, int remap)
90 orion5x_write(CPU_WIN_BASE(win), base & 0xffff0000);
91 orion5x_write(CPU_WIN_CTRL(win),
92 ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1);
94 if (orion5x_cpu_win_can_remap(win)) {
98 orion5x_write(CPU_WIN_REMAP_LO(win), remap & 0xffff0000);
99 orion5x_write(CPU_WIN_REMAP_HI(win), 0);
103 void __init orion5x_setup_cpu_mbus_bridge(void)
109 * First, disable and clear windows.
111 for (i = 0; i < 8; i++) {
112 orion5x_write(CPU_WIN_BASE(i), 0);
113 orion5x_write(CPU_WIN_CTRL(i), 0);
114 if (orion5x_cpu_win_can_remap(i)) {
115 orion5x_write(CPU_WIN_REMAP_LO(i), 0);
116 orion5x_write(CPU_WIN_REMAP_HI(i), 0);
121 * Setup windows for PCI+PCIe IO+MEM space.
123 setup_cpu_win(0, ORION5X_PCIE_IO_PHYS_BASE, ORION5X_PCIE_IO_SIZE,
124 TARGET_PCIE, ATTR_PCIE_IO, ORION5X_PCIE_IO_BUS_BASE);
125 setup_cpu_win(1, ORION5X_PCI_IO_PHYS_BASE, ORION5X_PCI_IO_SIZE,
126 TARGET_PCI, ATTR_PCI_IO, ORION5X_PCI_IO_BUS_BASE);
127 setup_cpu_win(2, ORION5X_PCIE_MEM_PHYS_BASE, ORION5X_PCIE_MEM_SIZE,
128 TARGET_PCIE, ATTR_PCIE_MEM, -1);
129 setup_cpu_win(3, ORION5X_PCI_MEM_PHYS_BASE, ORION5X_PCI_MEM_SIZE,
130 TARGET_PCI, ATTR_PCI_MEM, -1);
133 * Setup MBUS dram target info.
135 orion5x_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
137 for (i = 0, cs = 0; i < 4; i++) {
138 u32 base = readl(DDR_BASE_CS(i));
139 u32 size = readl(DDR_SIZE_CS(i));
142 * Chip select enabled?
145 struct mbus_dram_window *w;
147 w = &orion5x_mbus_dram_info.cs[cs++];
149 w->mbus_attr = 0xf & ~(1 << i);
150 w->base = base & 0xff000000;
151 w->size = (size | 0x00ffffff) + 1;
154 orion5x_mbus_dram_info.num_cs = cs;
157 void __init orion5x_setup_dev_boot_win(u32 base, u32 size)
159 setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
162 void __init orion5x_setup_dev0_win(u32 base, u32 size)
164 setup_cpu_win(5, base, size, TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
167 void __init orion5x_setup_dev1_win(u32 base, u32 size)
169 setup_cpu_win(6, base, size, TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
172 void __init orion5x_setup_dev2_win(u32 base, u32 size)
174 setup_cpu_win(7, base, size, TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
177 void __init orion5x_setup_pcie_wa_win(u32 base, u32 size)
179 setup_cpu_win(7, base, size, TARGET_PCIE, ATTR_PCIE_WA, -1);