Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 244 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-omap2/board-flash.c b/kernel/arch/arm/mach-omap2/board-flash.c
new file mode 100644
index 000000000..70b21cc27
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/board-flash.c
@@ -0,0 +1,244 @@
+/*
+ * board-flash.c
+ * Modified from mach-omap2/board-3430sdp-flash.c
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Copyright (C) 2009 Texas Instruments
+ *
+ * Vimal Singh <vimalsingh@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/omap-gpmc.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/io.h>
+
+#include <linux/platform_data/mtd-nand-omap2.h>
+#include <linux/platform_data/mtd-onenand-omap2.h>
+
+#include "soc.h"
+#include "common.h"
+#include "board-flash.h"
+
+#define REG_FPGA_REV			0x10
+#define REG_FPGA_DIP_SWITCH_INPUT2	0x60
+#define MAX_SUPPORTED_GPMC_CONFIG	3
+
+#define DEBUG_BASE		0x08000000 /* debug board */
+
+/* various memory sizes */
+#define FLASH_SIZE_SDPV1	SZ_64M	/* NOR flash (64 Meg aligned) */
+#define FLASH_SIZE_SDPV2	SZ_128M	/* NOR flash (256 Meg aligned) */
+
+static struct physmap_flash_data board_nor_data = {
+	.width		= 2,
+};
+
+static struct resource board_nor_resource = {
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device board_nor_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.dev		= {
+			.platform_data = &board_nor_data,
+	},
+	.num_resources	= 1,
+	.resource	= &board_nor_resource,
+};
+
+static void
+__init board_nor_init(struct mtd_partition *nor_parts, u8 nr_parts, u8 cs)
+{
+	int err;
+
+	board_nor_data.parts	= nor_parts;
+	board_nor_data.nr_parts	= nr_parts;
+
+	/* Configure start address and size of NOR device */
+	if (omap_rev() >= OMAP3430_REV_ES1_0) {
+		err = gpmc_cs_request(cs, FLASH_SIZE_SDPV2 - 1,
+				(unsigned long *)&board_nor_resource.start);
+		board_nor_resource.end = board_nor_resource.start
+					+ FLASH_SIZE_SDPV2 - 1;
+	} else {
+		err = gpmc_cs_request(cs, FLASH_SIZE_SDPV1 - 1,
+				(unsigned long *)&board_nor_resource.start);
+		board_nor_resource.end = board_nor_resource.start
+					+ FLASH_SIZE_SDPV1 - 1;
+	}
+	if (err < 0) {
+		pr_err("NOR: Can't request GPMC CS\n");
+		return;
+	}
+	if (platform_device_register(&board_nor_device) < 0)
+		pr_err("Unable to register NOR device\n");
+}
+
+#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
+		defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
+static struct omap_onenand_platform_data board_onenand_data = {
+	.dma_channel	= -1,   /* disable DMA in OMAP OneNAND driver */
+};
+
+void
+__init board_onenand_init(struct mtd_partition *onenand_parts,
+				u8 nr_parts, u8 cs)
+{
+	board_onenand_data.cs		= cs;
+	board_onenand_data.parts	= onenand_parts;
+	board_onenand_data.nr_parts	= nr_parts;
+
+	gpmc_onenand_init(&board_onenand_data);
+}
+#endif /* CONFIG_MTD_ONENAND_OMAP2 || CONFIG_MTD_ONENAND_OMAP2_MODULE */
+
+#if defined(CONFIG_MTD_NAND_OMAP2) || \
+		defined(CONFIG_MTD_NAND_OMAP2_MODULE)
+
+/* Note that all values in this struct are in nanoseconds */
+struct gpmc_timings nand_default_timings[1] = {
+	{
+		.sync_clk = 0,
+
+		.cs_on = 0,
+		.cs_rd_off = 36,
+		.cs_wr_off = 36,
+
+		.we_on = 6,
+		.oe_on = 6,
+
+		.adv_on = 6,
+		.adv_rd_off = 24,
+		.adv_wr_off = 36,
+
+		.we_off = 30,
+		.oe_off = 48,
+
+		.access = 54,
+		.rd_cycle = 72,
+		.wr_cycle = 72,
+
+		.wr_access = 30,
+		.wr_data_mux_bus = 0,
+	},
+};
+
+static struct omap_nand_platform_data board_nand_data;
+
+void
+__init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs,
+				int nand_type, struct gpmc_timings *gpmc_t)
+{
+	board_nand_data.cs		= cs;
+	board_nand_data.parts		= nand_parts;
+	board_nand_data.nr_parts	= nr_parts;
+	board_nand_data.devsize		= nand_type;
+
+	board_nand_data.ecc_opt = OMAP_ECC_HAM1_CODE_SW;
+	gpmc_nand_init(&board_nand_data, gpmc_t);
+}
+#endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */
+
+/**
+ * get_gpmc0_type - Reads the FPGA DIP_SWITCH_INPUT_REGISTER2 to get
+ * the various cs values.
+ */
+static u8 get_gpmc0_type(void)
+{
+	u8 cs = 0;
+	void __iomem *fpga_map_addr;
+
+	fpga_map_addr = ioremap(DEBUG_BASE, 4096);
+	if (!fpga_map_addr)
+		return -ENOMEM;
+
+	if (!(readw_relaxed(fpga_map_addr + REG_FPGA_REV)))
+		/* we dont have an DEBUG FPGA??? */
+		/* Depend on #defines!! default to strata boot return param */
+		goto unmap;
+
+	/* S8-DIP-OFF = 1, S8-DIP-ON = 0 */
+	cs = readw_relaxed(fpga_map_addr + REG_FPGA_DIP_SWITCH_INPUT2) & 0xf;
+
+	/* ES2.0 SDP's onwards 4 dip switches are provided for CS */
+	if (omap_rev() >= OMAP3430_REV_ES1_0)
+		/* change (S8-1:4=DS-2:0) to (S8-4:1=DS-2:0) */
+		cs = ((cs & 8) >> 3) | ((cs & 4) >> 1) |
+			((cs & 2) << 1) | ((cs & 1) << 3);
+	else
+		/* change (S8-1:3=DS-2:0) to (S8-3:1=DS-2:0) */
+		cs = ((cs & 4) >> 2) | (cs & 2) | ((cs & 1) << 2);
+unmap:
+	iounmap(fpga_map_addr);
+	return cs;
+}
+
+/**
+ * board_flash_init - Identify devices connected to GPMC and register.
+ *
+ * @return - void.
+ */
+void __init board_flash_init(struct flash_partitions partition_info[],
+			char chip_sel_board[][GPMC_CS_NUM], int nand_type)
+{
+	u8		cs = 0;
+	u8		norcs = GPMC_CS_NUM + 1;
+	u8		nandcs = GPMC_CS_NUM + 1;
+	u8		onenandcs = GPMC_CS_NUM + 1;
+	u8		idx;
+	unsigned char	*config_sel = NULL;
+
+	/* REVISIT: Is this return correct idx for 2430 SDP?
+	 * for which cs configuration matches for 2430 SDP?
+	 */
+	idx = get_gpmc0_type();
+	if (idx >= MAX_SUPPORTED_GPMC_CONFIG) {
+		pr_err("%s: Invalid chip select: %d\n", __func__, cs);
+		return;
+	}
+	config_sel = (unsigned char *)(chip_sel_board[idx]);
+
+	while (cs < GPMC_CS_NUM) {
+		switch (config_sel[cs]) {
+		case PDC_NOR:
+			if (norcs > GPMC_CS_NUM)
+				norcs = cs;
+			break;
+		case PDC_NAND:
+			if (nandcs > GPMC_CS_NUM)
+				nandcs = cs;
+			break;
+		case PDC_ONENAND:
+			if (onenandcs > GPMC_CS_NUM)
+				onenandcs = cs;
+			break;
+		}
+		cs++;
+	}
+
+	if (norcs > GPMC_CS_NUM)
+		pr_err("NOR: Unable to find configuration in GPMC\n");
+	else
+		board_nor_init(partition_info[0].parts,
+				partition_info[0].nr_parts, norcs);
+
+	if (onenandcs > GPMC_CS_NUM)
+		pr_err("OneNAND: Unable to find configuration in GPMC\n");
+	else
+		board_onenand_init(partition_info[1].parts,
+					partition_info[1].nr_parts, onenandcs);
+
+	if (nandcs > GPMC_CS_NUM)
+		pr_err("NAND: Unable to find configuration in GPMC\n");
+	else
+		board_nand_init(partition_info[2].parts,
+			partition_info[2].nr_parts, nandcs,
+			nand_type, nand_default_timings);
+}