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/*
* arch/arm/mach-kirkwood/addr-map.c
*
* Address map functions for Marvell Kirkwood SoCs
*
* 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 <mach/hardware.h>
#include "common.h"
/*
* Generic Address Decode Windows bit settings
*/
#define TARGET_DDR 0
#define TARGET_DEV_BUS 1
#define TARGET_SRAM 3
#define TARGET_PCIE 4
#define ATTR_DEV_SPI_ROM 0x1e
#define ATTR_DEV_BOOT 0x1d
#define ATTR_DEV_NAND 0x2f
#define ATTR_DEV_CS3 0x37
#define ATTR_DEV_CS2 0x3b
#define ATTR_DEV_CS1 0x3d
#define ATTR_DEV_CS0 0x3e
#define ATTR_PCIE_IO 0xe0
#define ATTR_PCIE_MEM 0xe8
#define ATTR_SRAM 0x01
/*
* Helpers to get DDR bank info
*/
#define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3))
#define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3))
/*
* CPU Address Decode Windows registers
*/
#define WIN_OFF(n) (BRIDGE_VIRT_BASE + 0x0000 + ((n) << 4))
#define WIN_CTRL_OFF 0x0000
#define WIN_BASE_OFF 0x0004
#define WIN_REMAP_LO_OFF 0x0008
#define WIN_REMAP_HI_OFF 0x000c
struct mbus_dram_target_info kirkwood_mbus_dram_info;
static int __init 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)
{
void __iomem *addr = (void __iomem *)WIN_OFF(win);
u32 ctrl;
base &= 0xffff0000;
ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1;
writel(base, addr + WIN_BASE_OFF);
writel(ctrl, addr + WIN_CTRL_OFF);
if (cpu_win_can_remap(win)) {
if (remap < 0)
remap = base;
writel(remap & 0xffff0000, addr + WIN_REMAP_LO_OFF);
writel(0, addr + WIN_REMAP_HI_OFF);
}
}
void __init kirkwood_setup_cpu_mbus(void)
{
void __iomem *addr;
int i;
int cs;
/*
* First, disable and clear windows.
*/
for (i = 0; i < 8; i++) {
addr = (void __iomem *)WIN_OFF(i);
writel(0, addr + WIN_BASE_OFF);
writel(0, addr + WIN_CTRL_OFF);
if (cpu_win_can_remap(i)) {
writel(0, addr + WIN_REMAP_LO_OFF);
writel(0, addr + WIN_REMAP_HI_OFF);
}
}
/*
* Setup windows for PCIe IO+MEM space.
*/
setup_cpu_win(0, KIRKWOOD_PCIE_IO_PHYS_BASE, KIRKWOOD_PCIE_IO_SIZE,
TARGET_PCIE, ATTR_PCIE_IO, KIRKWOOD_PCIE_IO_BUS_BASE);
setup_cpu_win(1, KIRKWOOD_PCIE_MEM_PHYS_BASE, KIRKWOOD_PCIE_MEM_SIZE,
TARGET_PCIE, ATTR_PCIE_MEM, KIRKWOOD_PCIE_MEM_BUS_BASE);
/*
* Setup window for NAND controller.
*/
setup_cpu_win(2, KIRKWOOD_NAND_MEM_PHYS_BASE, KIRKWOOD_NAND_MEM_SIZE,
TARGET_DEV_BUS, ATTR_DEV_NAND, -1);
/*
* Setup window for SRAM.
*/
setup_cpu_win(3, KIRKWOOD_SRAM_PHYS_BASE, KIRKWOOD_SRAM_SIZE,
TARGET_SRAM, ATTR_SRAM, -1);
/*
* Setup MBUS dram target info.
*/
kirkwood_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
addr = (void __iomem *)DDR_WINDOW_CPU_BASE;
for (i = 0, cs = 0; i < 4; i++) {
u32 base = readl(addr + DDR_BASE_CS_OFF(i));
u32 size = readl(addr + DDR_SIZE_CS_OFF(i));
/*
* Chip select enabled?
*/
if (size & 1) {
struct mbus_dram_window *w;
w = &kirkwood_mbus_dram_info.cs[cs++];
w->cs_index = i;
w->mbus_attr = 0xf & ~(1 << i);
w->base = base & 0xffff0000;
w->size = (size | 0x0000ffff) + 1;
}
}
kirkwood_mbus_dram_info.num_cs = cs;
}
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