Loading...
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 | /*
* arch/arm/mach-dove/addr-map.c
*
* Address map functions for Marvell Dove 88AP510 SoC
*
* 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 <linux/io.h>
#include <asm/mach/arch.h>
#include <asm/setup.h>
#include "common.h"
/*
* Generic Address Decode Windows bit settings
*/
#define TARGET_DDR 0x0
#define TARGET_BOOTROM 0x1
#define TARGET_CESA 0x3
#define TARGET_PCIE0 0x4
#define TARGET_PCIE1 0x8
#define TARGET_SCRATCHPAD 0xd
#define ATTR_CESA 0x01
#define ATTR_BOOTROM 0xfd
#define ATTR_DEV_SPI0_ROM 0xfe
#define ATTR_DEV_SPI1_ROM 0xfb
#define ATTR_PCIE_IO 0xe0
#define ATTR_PCIE_MEM 0xe8
#define ATTR_SCRATCHPAD 0x0
/*
* CPU Address Decode Windows registers
*/
#define WIN_CTRL(n) (BRIDGE_VIRT_BASE + ((n) << 4) + 0x0)
#define WIN_BASE(n) (BRIDGE_VIRT_BASE + ((n) << 4) + 0x4)
#define WIN_REMAP_LO(n) (BRIDGE_VIRT_BASE + ((n) << 4) + 0x8)
#define WIN_REMAP_HI(n) (BRIDGE_VIRT_BASE + ((n) << 4) + 0xc)
struct mbus_dram_target_info dove_mbus_dram_info;
static inline void __iomem *ddr_map_sc(int i)
{
return (void __iomem *)(DOVE_MC_VIRT_BASE + 0x100 + ((i) << 4));
}
static int cpu_win_can_remap(int win)
{
if (win < 4)
return 1;
return 0;
}
static void __init setup_cpu_win(int win, u32 base, u32 size,
u8 target, u8 attr, int remap)
{
u32 ctrl;
base &= 0xffff0000;
ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1;
writel(base, WIN_BASE(win));
writel(ctrl, WIN_CTRL(win));
if (cpu_win_can_remap(win)) {
if (remap < 0)
remap = base;
writel(remap & 0xffff0000, WIN_REMAP_LO(win));
writel(0, WIN_REMAP_HI(win));
}
}
void __init dove_setup_cpu_mbus(void)
{
int i;
int cs;
/*
* First, disable and clear windows.
*/
for (i = 0; i < 8; i++) {
writel(0, WIN_BASE(i));
writel(0, WIN_CTRL(i));
if (cpu_win_can_remap(i)) {
writel(0, WIN_REMAP_LO(i));
writel(0, WIN_REMAP_HI(i));
}
}
/*
* Setup windows for PCIe IO+MEM space.
*/
setup_cpu_win(0, DOVE_PCIE0_IO_PHYS_BASE, DOVE_PCIE0_IO_SIZE,
TARGET_PCIE0, ATTR_PCIE_IO, DOVE_PCIE0_IO_BUS_BASE);
setup_cpu_win(1, DOVE_PCIE1_IO_PHYS_BASE, DOVE_PCIE1_IO_SIZE,
TARGET_PCIE1, ATTR_PCIE_IO, DOVE_PCIE1_IO_BUS_BASE);
setup_cpu_win(2, DOVE_PCIE0_MEM_PHYS_BASE, DOVE_PCIE0_MEM_SIZE,
TARGET_PCIE0, ATTR_PCIE_MEM, -1);
setup_cpu_win(3, DOVE_PCIE1_MEM_PHYS_BASE, DOVE_PCIE1_MEM_SIZE,
TARGET_PCIE1, ATTR_PCIE_MEM, -1);
/*
* Setup window for CESA engine.
*/
setup_cpu_win(4, DOVE_CESA_PHYS_BASE, DOVE_CESA_SIZE,
TARGET_CESA, ATTR_CESA, -1);
/*
* Setup the Window to the BootROM for Standby and Sleep Resume
*/
setup_cpu_win(5, DOVE_BOOTROM_PHYS_BASE, DOVE_BOOTROM_SIZE,
TARGET_BOOTROM, ATTR_BOOTROM, -1);
/*
* Setup the Window to the PMU Scratch Pad space
*/
setup_cpu_win(6, DOVE_SCRATCHPAD_PHYS_BASE, DOVE_SCRATCHPAD_SIZE,
TARGET_SCRATCHPAD, ATTR_SCRATCHPAD, -1);
/*
* Setup MBUS dram target info.
*/
dove_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
for (i = 0, cs = 0; i < 2; i++) {
u32 map = readl(ddr_map_sc(i));
/*
* Chip select enabled?
*/
if (map & 1) {
struct mbus_dram_window *w;
w = &dove_mbus_dram_info.cs[cs++];
w->cs_index = i;
w->mbus_attr = 0; /* CS address decoding done inside */
/* the DDR controller, no need to */
/* provide attributes */
w->base = map & 0xff800000;
w->size = 0x100000 << (((map & 0x000f0000) >> 16) - 4);
}
}
dove_mbus_dram_info.num_cs = cs;
}
|