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 common.c.
39 * Note: although orion_setbits() and orion_clrbits() are not atomic
40 * no locking is necessary here since code in this file is only called
41 * at boot time when there is no concurrency issues.
45 * Generic Address Decode Windows bit settings
48 #define TARGET_DEV_BUS 1
51 #define ATTR_DDR_CS(n) (((n) ==0) ? 0xe : \
54 ((n) == 3) ? 0x7 : 0xf)
55 #define ATTR_PCIE_MEM 0x59
56 #define ATTR_PCIE_IO 0x51
57 #define ATTR_PCIE_WA 0x79
58 #define ATTR_PCI_MEM 0x59
59 #define ATTR_PCI_IO 0x51
60 #define ATTR_DEV_CS0 0x1e
61 #define ATTR_DEV_CS1 0x1d
62 #define ATTR_DEV_CS2 0x1b
63 #define ATTR_DEV_BOOT 0xf
67 * Helpers to get DDR bank info
69 #define DDR_BASE_CS(n) ORION5X_DDR_REG(0x1500 + ((n) * 8))
70 #define DDR_SIZE_CS(n) ORION5X_DDR_REG(0x1504 + ((n) * 8))
72 #define DDR_REG_TO_SIZE(reg) (((reg) | 0xffffff) + 1)
73 #define DDR_REG_TO_BASE(reg) ((reg) & 0xff000000)
77 * CPU Address Decode Windows registers
79 #define CPU_WIN_CTRL(n) ORION5X_BRIDGE_REG(0x000 | ((n) << 4))
80 #define CPU_WIN_BASE(n) ORION5X_BRIDGE_REG(0x004 | ((n) << 4))
81 #define CPU_WIN_REMAP_LO(n) ORION5X_BRIDGE_REG(0x008 | ((n) << 4))
82 #define CPU_WIN_REMAP_HI(n) ORION5X_BRIDGE_REG(0x00c | ((n) << 4))
85 struct mbus_dram_target_info orion5x_mbus_dram_info;
87 static int __init orion5x_cpu_win_can_remap(int win)
91 orion5x_pcie_id(&dev, &rev);
92 if ((dev == MV88F5281_DEV_ID && win < 4)
93 || (dev == MV88F5182_DEV_ID && win < 2)
94 || (dev == MV88F5181_DEV_ID && win < 2))
100 static void __init setup_cpu_win(int win, u32 base, u32 size,
101 u8 target, u8 attr, int remap)
103 orion5x_write(CPU_WIN_BASE(win), base & 0xffff0000);
104 orion5x_write(CPU_WIN_CTRL(win),
105 ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1);
107 if (orion5x_cpu_win_can_remap(win)) {
111 orion5x_write(CPU_WIN_REMAP_LO(win), remap & 0xffff0000);
112 orion5x_write(CPU_WIN_REMAP_HI(win), 0);
116 void __init orion5x_setup_cpu_mbus_bridge(void)
122 * First, disable and clear windows.
124 for (i = 0; i < 8; i++) {
125 orion5x_write(CPU_WIN_BASE(i), 0);
126 orion5x_write(CPU_WIN_CTRL(i), 0);
127 if (orion5x_cpu_win_can_remap(i)) {
128 orion5x_write(CPU_WIN_REMAP_LO(i), 0);
129 orion5x_write(CPU_WIN_REMAP_HI(i), 0);
134 * Setup windows for PCI+PCIe IO+MEM space.
136 setup_cpu_win(0, ORION5X_PCIE_IO_PHYS_BASE, ORION5X_PCIE_IO_SIZE,
137 TARGET_PCIE, ATTR_PCIE_IO, ORION5X_PCIE_IO_BUS_BASE);
138 setup_cpu_win(1, ORION5X_PCI_IO_PHYS_BASE, ORION5X_PCI_IO_SIZE,
139 TARGET_PCI, ATTR_PCI_IO, ORION5X_PCI_IO_BUS_BASE);
140 setup_cpu_win(2, ORION5X_PCIE_MEM_PHYS_BASE, ORION5X_PCIE_MEM_SIZE,
141 TARGET_PCIE, ATTR_PCIE_MEM, -1);
142 setup_cpu_win(3, ORION5X_PCI_MEM_PHYS_BASE, ORION5X_PCI_MEM_SIZE,
143 TARGET_PCI, ATTR_PCI_MEM, -1);
146 * Setup MBUS dram target info.
148 orion5x_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
150 for (i = 0, cs = 0; i < 4; i++) {
151 u32 base = readl(DDR_BASE_CS(i));
152 u32 size = readl(DDR_SIZE_CS(i));
155 * Chip select enabled?
158 struct mbus_dram_window *w;
160 w = &orion5x_mbus_dram_info.cs[cs++];
162 w->mbus_attr = 0xf & ~(1 << i);
163 w->base = base & 0xff000000;
164 w->size = (size | 0x00ffffff) + 1;
167 orion5x_mbus_dram_info.num_cs = cs;
170 void __init orion5x_setup_dev_boot_win(u32 base, u32 size)
172 setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
175 void __init orion5x_setup_dev0_win(u32 base, u32 size)
177 setup_cpu_win(5, base, size, TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
180 void __init orion5x_setup_dev1_win(u32 base, u32 size)
182 setup_cpu_win(6, base, size, TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
185 void __init orion5x_setup_dev2_win(u32 base, u32 size)
187 setup_cpu_win(7, base, size, TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
190 void __init orion5x_setup_pcie_wa_win(u32 base, u32 size)
192 setup_cpu_win(7, base, size, TARGET_PCIE, ATTR_PCIE_WA, -1);