148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/*
|
|
* 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_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
|
|
|
|
/*
|
|
* 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 __initdata win_alloc_count;
|
|
|
|
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, -1);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
win_alloc_count = 3;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
void __init kirkwood_setup_sram_win(u32 base, u32 size)
|
|
{
|
|
setup_cpu_win(win_alloc_count++, base, size, 0x03, 0x00, -1);
|
|
}
|