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, 350 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-davinci/devices.c b/kernel/arch/arm/mach-davinci/devices.c
new file mode 100644
index 000000000..6257aa452
--- /dev/null
+++ b/kernel/arch/arm/mach-davinci/devices.c
@@ -0,0 +1,350 @@
+/*
+ * mach-davinci/devices.c
+ *
+ * DaVinci platform device setup/initialization
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/reboot.h>
+
+#include <mach/hardware.h>
+#include <linux/platform_data/i2c-davinci.h>
+#include <mach/irqs.h>
+#include <mach/cputype.h>
+#include <mach/mux.h>
+#include <linux/platform_data/mmc-davinci.h>
+#include <mach/time.h>
+#include <linux/platform_data/edma.h>
+
+
+#include "davinci.h"
+#include "clock.h"
+
+#define DAVINCI_I2C_BASE	     0x01C21000
+#define DAVINCI_ATA_BASE	     0x01C66000
+#define DAVINCI_MMCSD0_BASE	     0x01E10000
+#define DM355_MMCSD0_BASE	     0x01E11000
+#define DM355_MMCSD1_BASE	     0x01E00000
+#define DM365_MMCSD0_BASE	     0x01D11000
+#define DM365_MMCSD1_BASE	     0x01D00000
+
+#define DAVINCI_DMA_MMCRXEVT	26
+#define DAVINCI_DMA_MMCTXEVT	27
+
+void __iomem  *davinci_sysmod_base;
+
+void davinci_map_sysmod(void)
+{
+	davinci_sysmod_base = ioremap_nocache(DAVINCI_SYSTEM_MODULE_BASE,
+					      0x800);
+	/*
+	 * Throw a bug since a lot of board initialization code depends
+	 * on system module availability. ioremap() failing this early
+	 * need careful looking into anyway.
+	 */
+	BUG_ON(!davinci_sysmod_base);
+}
+
+static struct resource i2c_resources[] = {
+	{
+		.start		= DAVINCI_I2C_BASE,
+		.end		= DAVINCI_I2C_BASE + 0x40,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= IRQ_I2C,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device davinci_i2c_device = {
+	.name           = "i2c_davinci",
+	.id             = 1,
+	.num_resources	= ARRAY_SIZE(i2c_resources),
+	.resource	= i2c_resources,
+};
+
+void __init davinci_init_i2c(struct davinci_i2c_platform_data *pdata)
+{
+	if (cpu_is_davinci_dm644x())
+		davinci_cfg_reg(DM644X_I2C);
+
+	davinci_i2c_device.dev.platform_data = pdata;
+	(void) platform_device_register(&davinci_i2c_device);
+}
+
+static struct resource ide_resources[] = {
+	{
+		.start		= DAVINCI_ATA_BASE,
+		.end		= DAVINCI_ATA_BASE + 0x7ff,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= IRQ_IDE,
+		.end		= IRQ_IDE,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static u64 ide_dma_mask = DMA_BIT_MASK(32);
+
+static struct platform_device ide_device = {
+	.name           = "palm_bk3710",
+	.id             = -1,
+	.resource       = ide_resources,
+	.num_resources  = ARRAY_SIZE(ide_resources),
+	.dev = {
+		.dma_mask		= &ide_dma_mask,
+		.coherent_dma_mask      = DMA_BIT_MASK(32),
+	},
+};
+
+void __init davinci_init_ide(void)
+{
+	if (cpu_is_davinci_dm644x()) {
+		davinci_cfg_reg(DM644X_HPIEN_DISABLE);
+		davinci_cfg_reg(DM644X_ATAEN);
+		davinci_cfg_reg(DM644X_HDIREN);
+	} else if (cpu_is_davinci_dm646x()) {
+		/* IRQ_DM646X_IDE is the same as IRQ_IDE */
+		davinci_cfg_reg(DM646X_ATAEN);
+	} else {
+		WARN_ON(1);
+		return;
+	}
+
+	platform_device_register(&ide_device);
+}
+
+#if IS_ENABLED(CONFIG_MMC_DAVINCI)
+
+static u64 mmcsd0_dma_mask = DMA_BIT_MASK(32);
+
+static struct resource mmcsd0_resources[] = {
+	{
+		/* different on dm355 */
+		.start = DAVINCI_MMCSD0_BASE,
+		.end   = DAVINCI_MMCSD0_BASE + SZ_4K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	/* IRQs:  MMC/SD, then SDIO */
+	{
+		.start = IRQ_MMCINT,
+		.flags = IORESOURCE_IRQ,
+	}, {
+		/* different on dm355 */
+		.start = IRQ_SDIOINT,
+		.flags = IORESOURCE_IRQ,
+	},
+	/* DMA channels: RX, then TX */
+	{
+		.start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCRXEVT),
+		.flags = IORESOURCE_DMA,
+	}, {
+		.start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCTXEVT),
+		.flags = IORESOURCE_DMA,
+	},
+};
+
+static struct platform_device davinci_mmcsd0_device = {
+	.name = "dm6441-mmc",
+	.id = 0,
+	.dev = {
+		.dma_mask = &mmcsd0_dma_mask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+	},
+	.num_resources = ARRAY_SIZE(mmcsd0_resources),
+	.resource = mmcsd0_resources,
+};
+
+static u64 mmcsd1_dma_mask = DMA_BIT_MASK(32);
+
+static struct resource mmcsd1_resources[] = {
+	{
+		.start = DM355_MMCSD1_BASE,
+		.end   = DM355_MMCSD1_BASE + SZ_4K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	/* IRQs:  MMC/SD, then SDIO */
+	{
+		.start = IRQ_DM355_MMCINT1,
+		.flags = IORESOURCE_IRQ,
+	}, {
+		.start = IRQ_DM355_SDIOINT1,
+		.flags = IORESOURCE_IRQ,
+	},
+	/* DMA channels: RX, then TX */
+	{
+		.start = EDMA_CTLR_CHAN(0, 30),	/* rx */
+		.flags = IORESOURCE_DMA,
+	}, {
+		.start = EDMA_CTLR_CHAN(0, 31),	/* tx */
+		.flags = IORESOURCE_DMA,
+	},
+};
+
+static struct platform_device davinci_mmcsd1_device = {
+	.name = "dm6441-mmc",
+	.id = 1,
+	.dev = {
+		.dma_mask = &mmcsd1_dma_mask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+	},
+	.num_resources = ARRAY_SIZE(mmcsd1_resources),
+	.resource = mmcsd1_resources,
+};
+
+
+void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
+{
+	struct platform_device	*pdev = NULL;
+
+	if (WARN_ON(cpu_is_davinci_dm646x()))
+		return;
+
+	/* REVISIT: update PINMUX, ARM_IRQMUX, and EDMA_EVTMUX here too;
+	 * for example if MMCSD1 is used for SDIO, maybe DAT2 is unused.
+	 *
+	 * FIXME dm6441 (no MMC/SD), dm357 (one), and dm335 (two) are
+	 * not handled right here ...
+	 */
+	switch (module) {
+	case 1:
+		if (cpu_is_davinci_dm355()) {
+			/* REVISIT we may not need all these pins if e.g. this
+			 * is a hard-wired SDIO device...
+			 */
+			davinci_cfg_reg(DM355_SD1_CMD);
+			davinci_cfg_reg(DM355_SD1_CLK);
+			davinci_cfg_reg(DM355_SD1_DATA0);
+			davinci_cfg_reg(DM355_SD1_DATA1);
+			davinci_cfg_reg(DM355_SD1_DATA2);
+			davinci_cfg_reg(DM355_SD1_DATA3);
+		} else if (cpu_is_davinci_dm365()) {
+			/* Configure pull down control */
+			unsigned v;
+
+			v = __raw_readl(DAVINCI_SYSMOD_VIRT(SYSMOD_PUPDCTL1));
+			__raw_writel(v & ~0xfc0,
+					DAVINCI_SYSMOD_VIRT(SYSMOD_PUPDCTL1));
+
+			mmcsd1_resources[0].start = DM365_MMCSD1_BASE;
+			mmcsd1_resources[0].end = DM365_MMCSD1_BASE +
+							SZ_4K - 1;
+			mmcsd1_resources[2].start = IRQ_DM365_SDIOINT1;
+			davinci_mmcsd1_device.name = "da830-mmc";
+		} else
+			break;
+
+		pdev = &davinci_mmcsd1_device;
+		break;
+	case 0:
+		if (cpu_is_davinci_dm355()) {
+			mmcsd0_resources[0].start = DM355_MMCSD0_BASE;
+			mmcsd0_resources[0].end = DM355_MMCSD0_BASE + SZ_4K - 1;
+			mmcsd0_resources[2].start = IRQ_DM355_SDIOINT0;
+
+			/* expose all 6 MMC0 signals:  CLK, CMD, DATA[0..3] */
+			davinci_cfg_reg(DM355_MMCSD0);
+
+			/* enable RX EDMA */
+			davinci_cfg_reg(DM355_EVT26_MMC0_RX);
+		} else if (cpu_is_davinci_dm365()) {
+			mmcsd0_resources[0].start = DM365_MMCSD0_BASE;
+			mmcsd0_resources[0].end = DM365_MMCSD0_BASE +
+							SZ_4K - 1;
+			mmcsd0_resources[2].start = IRQ_DM365_SDIOINT0;
+			davinci_mmcsd0_device.name = "da830-mmc";
+		} else if (cpu_is_davinci_dm644x()) {
+			/* REVISIT: should this be in board-init code? */
+			/* Power-on 3.3V IO cells */
+			__raw_writel(0,
+				DAVINCI_SYSMOD_VIRT(SYSMOD_VDD3P3VPWDN));
+			/*Set up the pull regiter for MMC */
+			davinci_cfg_reg(DM644X_MSTK);
+		}
+
+		pdev = &davinci_mmcsd0_device;
+		break;
+	}
+
+	if (WARN_ON(!pdev))
+		return;
+
+	pdev->dev.platform_data = config;
+	platform_device_register(pdev);
+}
+
+#else
+
+void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
+{
+}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static struct resource wdt_resources[] = {
+	{
+		.start	= DAVINCI_WDOG_BASE,
+		.end	= DAVINCI_WDOG_BASE + SZ_1K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+struct platform_device davinci_wdt_device = {
+	.name		= "davinci-wdt",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(wdt_resources),
+	.resource	= wdt_resources,
+};
+
+void davinci_restart(enum reboot_mode mode, const char *cmd)
+{
+	davinci_watchdog_reset(&davinci_wdt_device);
+}
+
+int davinci_init_wdt(void)
+{
+	return platform_device_register(&davinci_wdt_device);
+}
+
+static struct platform_device davinci_gpio_device = {
+	.name	= "davinci_gpio",
+	.id	= -1,
+};
+
+int davinci_gpio_register(struct resource *res, int size, void *pdata)
+{
+	davinci_gpio_device.resource = res;
+	davinci_gpio_device.num_resources = size;
+	davinci_gpio_device.dev.platform_data = pdata;
+	return platform_device_register(&davinci_gpio_device);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*-------------------------------------------------------------------------*/
+
+struct davinci_timer_instance davinci_timer_instance[2] = {
+	{
+		.base		= DAVINCI_TIMER0_BASE,
+		.bottom_irq	= IRQ_TINT0_TINT12,
+		.top_irq	= IRQ_TINT0_TINT34,
+	},
+	{
+		.base		= DAVINCI_TIMER1_BASE,
+		.bottom_irq	= IRQ_TINT1_TINT12,
+		.top_irq	= IRQ_TINT1_TINT34,
+	},
+};
+