/*
* arch/arm/mach-loki/addr-map.c
*
* Address map functions for Marvell Loki (88RC8480) 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_PCIE0 3
#define TARGET_PCIE1 4
#define ATTR_DEV_BOOT 0x0f
#define ATTR_DEV_CS2 0x1b
#define ATTR_DEV_CS1 0x1d
#define ATTR_DEV_CS0 0x1e
#define ATTR_PCIE_IO 0x51
#define ATTR_PCIE_MEM 0x59
/*
* Helpers to get DDR bank info
*/
#define DDR_SIZE_CS(n) DDR_REG(0x1500 + ((n) << 3))
#define DDR_BASE_CS(n) DDR_REG(0x1504 + ((n) << 3))
/*
* CPU Address Decode Windows registers
*/
#define BRIDGE_REG(x) (BRIDGE_VIRT_BASE | (x))
#define CPU_WIN_CTRL(n) BRIDGE_REG(0x000 | ((n) << 4))
#define CPU_WIN_BASE(n) BRIDGE_REG(0x004 | ((n) << 4))
#define CPU_WIN_REMAP_LO(n) BRIDGE_REG(0x008 | ((n) << 4))
#define CPU_WIN_REMAP_HI(n) BRIDGE_REG(0x00c | ((n) << 4))
struct mbus_dram_target_info loki_mbus_dram_info;
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) | (1 << 5) | target;
writel(base, CPU_WIN_BASE(win));
writel(ctrl, CPU_WIN_CTRL(win));
if (win < 2) {
if (remap < 0)
remap = base;
writel(remap & 0xffff0000, CPU_WIN_REMAP_LO(win));
writel(0, CPU_WIN_REMAP_HI(win));
}
}
void __init loki_setup_cpu_mbus(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 (i < 2) {
writel(0, CPU_WIN_REMAP_LO(i));
writel(0, CPU_WIN_REMAP_HI(i));
}
}
/*
* Setup windows for PCIe IO+MEM space.
*/
setup_cpu_win(2, LOKI_PCIE0_MEM_PHYS_BASE, LOKI_PCIE0_MEM_SIZE,
TARGET_PCIE0, ATTR_PCIE_MEM, -1);
setup_cpu_win(3, LOKI_PCIE1_MEM_PHYS_BASE, LOKI_PCIE1_MEM_SIZE,
TARGET_PCIE1, ATTR_PCIE_MEM, -1);
/*
* Setup MBUS dram target info.
*/
loki_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 = &loki_mbus_dram_info.cs[cs++];
w->cs_index = i;
w->mbus_attr = 0xf & ~(1 << i);
w->base = base & 0xffff0000;
w->size = (size | 0x0000ffff) + 1;
}
}
loki_mbus_dram_info.num_cs = cs;
}
void __init loki_setup_dev_boot_win(u32 base, u32 size)
{
setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
}
