[ARM] add Marvell Kirkwood (88F6000) SoC support

The Marvell Kirkwood (88F6000) is a family of ARM SoCs based on a
Shiva CPU core, and features a DDR2 controller, a x1 PCIe interface,
a USB 2.0 interface, a SPI controller, a crypto accelerator, a TS
interface, and IDMA/XOR engines, and depending on the model, also
features one or two Gigabit Ethernet interfaces, two SATA II
interfaces, one or two TWSI interfaces, one or two UARTs, a
TDM/SLIC interface, a NAND controller, an I2S/SPDIF interface, and
an SDIO interface.

This patch adds supports for the Marvell DB-88F6281-BP Development
Board and the RD-88F6192-NAS and the RD-88F6281 Reference Designs,
enabling support for the PCIe interface, the USB interface, the
ethernet interfaces, the SATA interfaces, the TWSI interfaces, the
UARTs, and the NAND controller.

Signed-off-by: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

arch/arm/Kconfig

@@ -352,6 +352,16 @@ config ARCH_L7200
 	  If you have any questions or comments about the Linux kernel port
 	  to this board, send e-mail to <sjhill@cotw.com>.
 
+config ARCH_KIRKWOOD
+	bool "Marvell Kirkwood"
+	select PCI
+	select GENERIC_TIME
+	select GENERIC_CLOCKEVENTS
+	select PLAT_ORION
+	help
+	  Support for the following Marvell Kirkwood series SoCs:
+	  88F6180, 88F6192 and 88F6281.
+
 config ARCH_KS8695
 	bool "Micrel/Kendin KS8695"
 	select GENERIC_GPIO
@@ -530,6 +540,8 @@ source "arch/arm/mach-omap2/Kconfig"
 
 source "arch/arm/mach-orion5x/Kconfig"
 
+source "arch/arm/mach-kirkwood/Kconfig"
+
 source "arch/arm/plat-s3c24xx/Kconfig"
 source "arch/arm/plat-s3c/Kconfig"
 

arch/arm/Makefile

@@ -135,6 +135,7 @@ endif
  machine-$(CONFIG_ARCH_NETX)	   := netx
  machine-$(CONFIG_ARCH_NS9XXX)	   := ns9xxx
  machine-$(CONFIG_ARCH_DAVINCI)	   := davinci
+ machine-$(CONFIG_ARCH_KIRKWOOD)   := kirkwood
  machine-$(CONFIG_ARCH_KS8695)     := ks8695
   incdir-$(CONFIG_ARCH_MXC)	   := mxc
  machine-$(CONFIG_ARCH_MX3)	   := mx3

arch/arm/mach-kirkwood/Kconfig

@@ -0,0 +1,25 @@
+if ARCH_KIRKWOOD
+
+menu "Marvell Kirkwood Implementations"
+
+config MACH_DB88F6281_BP
+	bool "Marvell DB-88F6281-BP Development Board"
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Marvell DB-88F6281-BP Development Board.
+
+config MACH_RD88F6192_NAS
+	bool "Marvell RD-88F6192-NAS Reference Board"
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Marvell RD-88F6192-NAS Reference Board.
+
+config MACH_RD88F6281
+	bool "Marvell RD-88F6281 Reference Board"
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Marvell RD-88F6281 Reference Board.
+
+endmenu
+
+endif

arch/arm/mach-kirkwood/Makefile

@@ -0,0 +1,5 @@
+obj-y				+= common.o addr-map.o irq.o pcie.o
+
+obj-$(CONFIG_MACH_DB88F6281_BP)		+= db88f6281-bp-setup.o
+obj-$(CONFIG_MACH_RD88F6192_NAS)	+= rd88f6192-nas-setup.o
+obj-$(CONFIG_MACH_RD88F6192_NAS)	+= rd88f6281-setup.o

arch/arm/mach-kirkwood/Makefile.boot

@@ -0,0 +1,3 @@
+   zreladdr-y	:= 0x00008000
+params_phys-y	:= 0x00000100
+initrd_phys-y	:= 0x00800000

arch/arm/mach-kirkwood/addr-map.c

@@ -0,0 +1,139 @@
+/*
+ * 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 <asm/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 __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);
+
+	/*
+	 * 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;
+}