ARM: add base support for Marvell Dove SoC

The Marvell Dove (88AP510) is a high-performance, highly integrated,
low power SoC with high-end ARM-compatible processor (known as PJ4),
graphics processing unit, high-definition video decoding acceleration
hardware, and a broad range of peripherals.

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

1 files changed, 149 insertions, 0 deletions

diff --git a/arch/arm/mach-dove/addr-map.c b/arch/arm/mach-dove/addr-map.c
new file mode 100644
index 000000000000..00be4fc26dd7
--- /dev/null
+++ b/arch/arm/mach-dove/addr-map.c
@@ -0,0 +1,149 @@
+/*
+ * arch/arm/mach-dove/addr-map.c
+ *
+ * Address map functions for Marvell Dove 88AP510 SoC
+ *
+ * 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/mach/arch.h>
+#include <asm/setup.h>
+#include "common.h"
+
+/*
+ * Generic Address Decode Windows bit settings
+ */
+#define TARGET_DDR		0x0
+#define TARGET_BOOTROM		0x1
+#define TARGET_CESA		0x3
+#define TARGET_PCIE0		0x4
+#define TARGET_PCIE1		0x8
+#define TARGET_SCRATCHPAD	0xd
+
+#define ATTR_CESA		0x01
+#define ATTR_BOOTROM		0xfd
+#define ATTR_DEV_SPI0_ROM	0xfe
+#define ATTR_DEV_SPI1_ROM	0xfb
+#define ATTR_PCIE_IO		0xe0
+#define ATTR_PCIE_MEM		0xe8
+#define ATTR_SCRATCHPAD		0x0
+
+/*
+ * CPU Address Decode Windows registers
+ */
+#define WIN_CTRL(n)	(BRIDGE_VIRT_BASE + ((n) << 4) + 0x0)
+#define WIN_BASE(n)	(BRIDGE_VIRT_BASE + ((n) << 4) + 0x4)
+#define WIN_REMAP_LO(n)	(BRIDGE_VIRT_BASE + ((n) << 4) + 0x8)
+#define WIN_REMAP_HI(n)	(BRIDGE_VIRT_BASE + ((n) << 4) + 0xc)
+
+struct mbus_dram_target_info dove_mbus_dram_info;
+
+static inline void __iomem *ddr_map_sc(int i)
+{
+	return (void __iomem *)(DOVE_MC_VIRT_BASE + 0x100 + ((i) << 4));
+}
+
+static int 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)
+{
+	u32 ctrl;
+
+	base &= 0xffff0000;
+	ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1;
+
+	writel(base, WIN_BASE(win));
+	writel(ctrl, WIN_CTRL(win));
+	if (cpu_win_can_remap(win)) {
+		if (remap < 0)
+			remap = base;
+		writel(remap & 0xffff0000, WIN_REMAP_LO(win));
+		writel(0, WIN_REMAP_HI(win));
+	}
+}
+
+void __init dove_setup_cpu_mbus(void)
+{
+	int i;
+	int cs;
+
+	/*
+	 * First, disable and clear windows.
+	 */
+	for (i = 0; i < 8; i++) {
+		writel(0, WIN_BASE(i));
+		writel(0, WIN_CTRL(i));
+		if (cpu_win_can_remap(i)) {
+			writel(0, WIN_REMAP_LO(i));
+			writel(0, WIN_REMAP_HI(i));
+		}
+	}
+
+	/*
+	 * Setup windows for PCIe IO+MEM space.
+	 */
+	setup_cpu_win(0, DOVE_PCIE0_IO_PHYS_BASE, DOVE_PCIE0_IO_SIZE,
+		      TARGET_PCIE0, ATTR_PCIE_IO, DOVE_PCIE0_IO_BUS_BASE);
+	setup_cpu_win(1, DOVE_PCIE1_IO_PHYS_BASE, DOVE_PCIE1_IO_SIZE,
+		      TARGET_PCIE1, ATTR_PCIE_IO, DOVE_PCIE1_IO_BUS_BASE);
+	setup_cpu_win(2, DOVE_PCIE0_MEM_PHYS_BASE, DOVE_PCIE0_MEM_SIZE,
+		      TARGET_PCIE0, ATTR_PCIE_MEM, -1);
+	setup_cpu_win(3, DOVE_PCIE1_MEM_PHYS_BASE, DOVE_PCIE1_MEM_SIZE,
+		      TARGET_PCIE1, ATTR_PCIE_MEM, -1);
+
+	/*
+	 * Setup window for CESA engine.
+	 */
+	setup_cpu_win(4, DOVE_CESA_PHYS_BASE, DOVE_CESA_SIZE,
+		      TARGET_CESA, ATTR_CESA, -1);
+
+	/*
+	 * Setup the Window to the BootROM for Standby and Sleep Resume
+	 */
+	setup_cpu_win(5, DOVE_BOOTROM_PHYS_BASE, DOVE_BOOTROM_SIZE,
+		      TARGET_BOOTROM, ATTR_BOOTROM, -1);
+
+	/*
+	 * Setup the Window to the PMU Scratch Pad space
+	 */
+	setup_cpu_win(6, DOVE_SCRATCHPAD_PHYS_BASE, DOVE_SCRATCHPAD_SIZE,
+		      TARGET_SCRATCHPAD, ATTR_SCRATCHPAD, -1);
+
+	/*
+	 * Setup MBUS dram target info.
+	 */
+	dove_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
+
+	for (i = 0, cs = 0; i < 2; i++) {
+		u32 map = readl(ddr_map_sc(i));
+
+		/*
+		 * Chip select enabled?
+		 */
+		if (map & 1) {
+			struct mbus_dram_window *w;
+
+			w = &dove_mbus_dram_info.cs[cs++];
+			w->cs_index = i;
+			w->mbus_attr = 0; /* CS address decoding done inside */
+					  /* the DDR controller, no need to  */
+					  /* provide attributes */
+			w->base = map & 0xff800000;
+			w->size = 0x100000 << (((map & 0x000f0000) >> 16) - 4);
+		}
+	}
+	dove_mbus_dram_info.num_cs = cs;
+}