1 files changed, 240 insertions, 0 deletions

diff --git a/arch/arm/mach-orion5x/addr-map.c b/arch/arm/mach-orion5x/addr-map.c
new file mode 100644
index 000000000000..6b179371e0a2
--- /dev/null
+++ b/arch/arm/mach-orion5x/addr-map.c
@@ -0,0 +1,240 @@
+/*
+ * arch/arm/mach-orion5x/addr-map.c
+ *
+ * Address map functions for Marvell Orion 5x SoCs
+ *
+ * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
+ *
+ * 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 <asm/hardware.h>
+#include <asm/io.h>
+#include "common.h"
+
+/*
+ * The Orion has fully programable address map. There's a separate address
+ * map for each of the device _master_ interfaces, e.g. CPU, PCI, PCIE, USB,
+ * Gigabit Ethernet, DMA/XOR engines, etc. Each interface has its own
+ * address decode windows that allow it to access any of the Orion resources.
+ *
+ * CPU address decoding --
+ * Linux assumes that it is the boot loader that already setup the access to
+ * DDR and internal registers.
+ * Setup access to PCI and PCI-E IO/MEM space is issued by this file.
+ * Setup access to various devices located on the device bus interface (e.g.
+ * flashes, RTC, etc) should be issued by machine-setup.c according to
+ * specific board population (by using orion5x_setup_*_win()).
+ *
+ * Non-CPU Masters address decoding --
+ * Unlike the CPU, we setup the access from Orion's master interfaces to DDR
+ * banks only (the typical use case).
+ * Setup access for each master to DDR is issued by common.c.
+ *
+ * Note: although orion_setbits() and orion_clrbits() are not atomic
+ * no locking is necessary here since code in this file is only called
+ * at boot time when there is no concurrency issues.
+ */
+
+/*
+ * Generic Address Decode Windows bit settings
+ */
+#define TARGET_DDR              0
+#define TARGET_DEV_BUS          1
+#define TARGET_PCI              3
+#define TARGET_PCIE             4
+#define ATTR_DDR_CS(n)          (((n) ==0) ? 0xe :      \
+                                ((n) == 1) ? 0xd :      \
+                                ((n) == 2) ? 0xb :      \
+                                ((n) == 3) ? 0x7 : 0xf)
+#define ATTR_PCIE_MEM           0x59
+#define ATTR_PCIE_IO            0x51
+#define ATTR_PCIE_WA            0x79
+#define ATTR_PCI_MEM            0x59
+#define ATTR_PCI_IO             0x51
+#define ATTR_DEV_CS0            0x1e
+#define ATTR_DEV_CS1            0x1d
+#define ATTR_DEV_CS2            0x1b
+#define ATTR_DEV_BOOT           0xf
+#define WIN_EN                  1
+
+/*
+ * Helpers to get DDR bank info
+ */
+#define DDR_BASE_CS(n)          ORION5X_DDR_REG(0x1500 + ((n) * 8))
+#define DDR_SIZE_CS(n)          ORION5X_DDR_REG(0x1504 + ((n) * 8))
+#define DDR_MAX_CS              4
+#define DDR_REG_TO_SIZE(reg)    (((reg) | 0xffffff) + 1)
+#define DDR_REG_TO_BASE(reg)    ((reg) & 0xff000000)
+#define DDR_BANK_EN             1
+
+/*
+ * CPU Address Decode Windows registers
+ */
+#define CPU_WIN_CTRL(n)         ORION5X_BRIDGE_REG(0x000 | ((n) << 4))
+#define CPU_WIN_BASE(n)         ORION5X_BRIDGE_REG(0x004 | ((n) << 4))
+#define CPU_WIN_REMAP_LO(n)     ORION5X_BRIDGE_REG(0x008 | ((n) << 4))
+#define CPU_WIN_REMAP_HI(n)     ORION5X_BRIDGE_REG(0x00c | ((n) << 4))
+
+/*
+ * Gigabit Ethernet Address Decode Windows registers
+ */
+#define ETH_WIN_BASE(win)       ORION5X_ETH_REG(0x200 + ((win) * 8))
+#define ETH_WIN_SIZE(win)       ORION5X_ETH_REG(0x204 + ((win) * 8))
+#define ETH_WIN_REMAP(win)      ORION5X_ETH_REG(0x280 + ((win) * 4))
+#define ETH_WIN_EN              ORION5X_ETH_REG(0x290)
+#define ETH_WIN_PROT            ORION5X_ETH_REG(0x294)
+#define ETH_MAX_WIN             6
+#define ETH_MAX_REMAP_WIN       4
+
+
+struct mbus_dram_target_info orion5x_mbus_dram_info;
+
+static int __init orion5x_cpu_win_can_remap(int win)
+{
+        u32 dev, rev;
+
+        orion5x_pcie_id(&dev, &rev);
+        if ((dev == MV88F5281_DEV_ID && win < 4)
+            || (dev == MV88F5182_DEV_ID && win < 2)
+            || (dev == MV88F5181_DEV_ID && win < 2))
+                return 1;
+
+        return 0;
+}
+
+static void __init setup_cpu_win(int win, u32 base, u32 size,
+                                 u8 target, u8 attr, int remap)
+{
+        orion5x_write(CPU_WIN_BASE(win), base & 0xffff0000);
+        orion5x_write(CPU_WIN_CTRL(win),
+                ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1);
+
+        if (orion5x_cpu_win_can_remap(win)) {
+                if (remap < 0)
+                        remap = base;
+
+                orion5x_write(CPU_WIN_REMAP_LO(win), remap & 0xffff0000);
+                orion5x_write(CPU_WIN_REMAP_HI(win), 0);
+        }
+}
+
+void __init orion5x_setup_cpu_mbus_bridge(void)
+{
+        int i;
+        int cs;
+
+        /*
+         * First, disable and clear windows.
+         */
+        for (i = 0; i < 8; i++) {
+                orion5x_write(CPU_WIN_BASE(i), 0);
+                orion5x_write(CPU_WIN_CTRL(i), 0);
+                if (orion5x_cpu_win_can_remap(i)) {
+                        orion5x_write(CPU_WIN_REMAP_LO(i), 0);
+                        orion5x_write(CPU_WIN_REMAP_HI(i), 0);
+                }
+        }
+
+        /*
+         * Setup windows for PCI+PCIe IO+MEM space.
+         */
+        setup_cpu_win(0, ORION5X_PCIE_IO_PHYS_BASE, ORION5X_PCIE_IO_SIZE,
+                TARGET_PCIE, ATTR_PCIE_IO, ORION5X_PCIE_IO_BUS_BASE);
+        setup_cpu_win(1, ORION5X_PCI_IO_PHYS_BASE, ORION5X_PCI_IO_SIZE,
+                TARGET_PCI, ATTR_PCI_IO, ORION5X_PCI_IO_BUS_BASE);
+        setup_cpu_win(2, ORION5X_PCIE_MEM_PHYS_BASE, ORION5X_PCIE_MEM_SIZE,
+                TARGET_PCIE, ATTR_PCIE_MEM, -1);
+        setup_cpu_win(3, ORION5X_PCI_MEM_PHYS_BASE, ORION5X_PCI_MEM_SIZE,
+                TARGET_PCI, ATTR_PCI_MEM, -1);
+
+        /*
+         * Setup MBUS dram target info.
+         */
+        orion5x_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 = &orion5x_mbus_dram_info.cs[cs++];
+                        w->cs_index = i;
+                        w->mbus_attr = 0xf & ~(1 << i);
+                        w->base = base & 0xff000000;
+                        w->size = (size | 0x00ffffff) + 1;
+                }
+        }
+        orion5x_mbus_dram_info.num_cs = cs;
+}
+
+void __init orion5x_setup_dev_boot_win(u32 base, u32 size)
+{
+        setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
+}
+
+void __init orion5x_setup_dev0_win(u32 base, u32 size)
+{
+        setup_cpu_win(5, base, size, TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
+}
+
+void __init orion5x_setup_dev1_win(u32 base, u32 size)
+{
+        setup_cpu_win(6, base, size, TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
+}
+
+void __init orion5x_setup_dev2_win(u32 base, u32 size)
+{
+        setup_cpu_win(7, base, size, TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
+}
+
+void __init orion5x_setup_pcie_wa_win(u32 base, u32 size)
+{
+        setup_cpu_win(7, base, size, TARGET_PCIE, ATTR_PCIE_WA, -1);
+}
+
+void __init orion5x_setup_eth_wins(void)
+{
+        int i;
+
+        /*
+         * First, disable and clear windows
+         */
+        for (i = 0; i < ETH_MAX_WIN; i++) {
+                orion5x_write(ETH_WIN_BASE(i), 0);
+                orion5x_write(ETH_WIN_SIZE(i), 0);
+                orion5x_setbits(ETH_WIN_EN, 1 << i);
+                orion5x_clrbits(ETH_WIN_PROT, 0x3 << (i * 2));
+                if (i < ETH_MAX_REMAP_WIN)
+                        orion5x_write(ETH_WIN_REMAP(i), 0);
+        }
+
+        /*
+         * Setup windows for DDR banks.
+         */
+        for (i = 0; i < DDR_MAX_CS; i++) {
+                u32 base, size;
+                size = orion5x_read(DDR_SIZE_CS(i));
+                base = orion5x_read(DDR_BASE_CS(i));
+                if (size & DDR_BANK_EN) {
+                        base = DDR_REG_TO_BASE(base);
+                        size = DDR_REG_TO_SIZE(size);
+                        orion5x_write(ETH_WIN_SIZE(i), (size-1) & 0xffff0000);
+                        orion5x_write(ETH_WIN_BASE(i), (base & 0xffff0000) |
+                                        (ATTR_DDR_CS(i) << 8) |
+                                        TARGET_DDR);
+                        orion5x_clrbits(ETH_WIN_EN, 1 << i);
+                        orion5x_setbits(ETH_WIN_PROT, 0x3 << (i * 2));
+                }
+        }
+}