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>

7 files changed, 597 insertions, 0 deletions

diff --git a/kernel/arch/sh/boards/mach-sdk7786/Makefile b/kernel/arch/sh/boards/mach-sdk7786/Makefile
new file mode 100644
index 000000000..45d32e359
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-sdk7786/Makefile
@@ -0,0 +1,4 @@
+obj-y	:= fpga.o irq.o nmi.o setup.o
+
+obj-$(CONFIG_GPIOLIB)		+= gpio.o
+obj-$(CONFIG_HAVE_SRAM_POOL)	+= sram.o
diff --git a/kernel/arch/sh/boards/mach-sdk7786/fpga.c b/kernel/arch/sh/boards/mach-sdk7786/fpga.c
new file mode 100644
index 000000000..3e4ec66a0
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-sdk7786/fpga.c
@@ -0,0 +1,72 @@
+/*
+ * SDK7786 FPGA Support.
+ *
+ * Copyright (C) 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/bcd.h>
+#include <mach/fpga.h>
+#include <asm/sizes.h>
+
+#define FPGA_REGS_OFFSET	0x03fff800
+#define FPGA_REGS_SIZE		0x490
+
+/*
+ * The FPGA can be mapped in any of the generally available areas,
+ * so we attempt to scan for it using the fixed SRSTR read magic.
+ *
+ * Once the FPGA is located, the rest of the mapping data for the other
+ * components can be determined dynamically from its section mapping
+ * registers.
+ */
+static void __iomem *sdk7786_fpga_probe(void)
+{
+	unsigned long area;
+	void __iomem *base;
+
+	/*
+	 * Iterate over all of the areas where the FPGA could be mapped.
+	 * The possible range is anywhere from area 0 through 6, area 7
+	 * is reserved.
+	 */
+	for (area = PA_AREA0; area < PA_AREA7; area += SZ_64M) {
+		base = ioremap_nocache(area + FPGA_REGS_OFFSET, FPGA_REGS_SIZE);
+		if (!base) {
+			/* Failed to remap this area, move along. */
+			continue;
+		}
+
+		if (ioread16(base + SRSTR) == SRSTR_MAGIC)
+			return base;	/* Found it! */
+
+		iounmap(base);
+	}
+
+	return NULL;
+}
+
+void __iomem *sdk7786_fpga_base;
+
+void __init sdk7786_fpga_init(void)
+{
+	u16 version, date;
+
+	sdk7786_fpga_base = sdk7786_fpga_probe();
+	if (unlikely(!sdk7786_fpga_base)) {
+		panic("FPGA detection failed.\n");
+		return;
+	}
+
+	version = fpga_read_reg(FPGAVR);
+	date = fpga_read_reg(FPGADR);
+
+	pr_info("\tFPGA version:\t%d.%d (built on %d/%d/%d)\n",
+		bcd2bin(version >> 8) & 0xf, bcd2bin(version & 0xf),
+		((date >> 12) & 0xf) + 2000,
+		(date >> 8) & 0xf, bcd2bin(date & 0xff));
+}
diff --git a/kernel/arch/sh/boards/mach-sdk7786/gpio.c b/kernel/arch/sh/boards/mach-sdk7786/gpio.c
new file mode 100644
index 000000000..f71ce09d4
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-sdk7786/gpio.c
@@ -0,0 +1,49 @@
+/*
+ * SDK7786 FPGA USRGPIR Support.
+ *
+ * Copyright (C) 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <mach/fpga.h>
+
+#define NR_FPGA_GPIOS	8
+
+static const char *usrgpir_gpio_names[NR_FPGA_GPIOS] = {
+	"in0", "in1", "in2", "in3", "in4", "in5", "in6", "in7",
+};
+
+static int usrgpir_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+	/* always in */
+	return 0;
+}
+
+static int usrgpir_gpio_get(struct gpio_chip *chip, unsigned gpio)
+{
+	return !!(fpga_read_reg(USRGPIR) & (1 << gpio));
+}
+
+static struct gpio_chip usrgpir_gpio_chip = {
+	.label			= "sdk7786-fpga",
+	.names			= usrgpir_gpio_names,
+	.direction_input	= usrgpir_gpio_direction_input,
+	.get			= usrgpir_gpio_get,
+	.base			= -1, /* don't care */
+	.ngpio			= NR_FPGA_GPIOS,
+};
+
+static int __init usrgpir_gpio_setup(void)
+{
+	return gpiochip_add(&usrgpir_gpio_chip);
+}
+device_initcall(usrgpir_gpio_setup);
diff --git a/kernel/arch/sh/boards/mach-sdk7786/irq.c b/kernel/arch/sh/boards/mach-sdk7786/irq.c
new file mode 100644
index 000000000..46943a0da
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-sdk7786/irq.c
@@ -0,0 +1,48 @@
+/*
+ * SDK7786 FPGA IRQ Controller Support.
+ *
+ * Copyright (C) 2010  Matt Fleming
+ * Copyright (C) 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/irq.h>
+#include <mach/fpga.h>
+#include <mach/irq.h>
+
+enum {
+	ATA_IRQ_BIT		= 1,
+	SPI_BUSY_BIT		= 2,
+	LIRQ5_BIT		= 3,
+	LIRQ6_BIT		= 4,
+	LIRQ7_BIT		= 5,
+	LIRQ8_BIT		= 6,
+	KEY_IRQ_BIT		= 7,
+	PEN_IRQ_BIT		= 8,
+	ETH_IRQ_BIT		= 9,
+	RTC_ALARM_BIT		= 10,
+	CRYSTAL_FAIL_BIT	= 12,
+	ETH_PME_BIT		= 14,
+};
+
+void __init sdk7786_init_irq(void)
+{
+	unsigned int tmp;
+
+	/* Enable priority encoding for all IRLs */
+	fpga_write_reg(fpga_read_reg(INTMSR) | 0x0303, INTMSR);
+
+	/* Clear FPGA interrupt status registers */
+	fpga_write_reg(0x0000, INTASR);
+	fpga_write_reg(0x0000, INTBSR);
+
+	/* Unmask FPGA interrupts */
+	tmp = fpga_read_reg(INTAMR);
+	tmp &= ~(1 << ETH_IRQ_BIT);
+	fpga_write_reg(tmp, INTAMR);
+
+	plat_irq_setup_pins(IRQ_MODE_IRL7654_MASK);
+	plat_irq_setup_pins(IRQ_MODE_IRL3210_MASK);
+}
diff --git a/kernel/arch/sh/boards/mach-sdk7786/nmi.c b/kernel/arch/sh/boards/mach-sdk7786/nmi.c
new file mode 100644
index 000000000..edcfa1f56
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-sdk7786/nmi.c
@@ -0,0 +1,83 @@
+/*
+ * SDK7786 FPGA NMI Support.
+ *
+ * Copyright (C) 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <mach/fpga.h>
+
+enum {
+	NMI_MODE_MANUAL,
+	NMI_MODE_AUX,
+	NMI_MODE_MASKED,
+	NMI_MODE_ANY,
+	NMI_MODE_UNKNOWN,
+};
+
+/*
+ * Default to the manual NMI switch.
+ */
+static unsigned int __initdata nmi_mode = NMI_MODE_ANY;
+
+static int __init nmi_mode_setup(char *str)
+{
+	if (!str)
+		return 0;
+
+	if (strcmp(str, "manual") == 0)
+		nmi_mode = NMI_MODE_MANUAL;
+	else if (strcmp(str, "aux") == 0)
+		nmi_mode = NMI_MODE_AUX;
+	else if (strcmp(str, "masked") == 0)
+		nmi_mode = NMI_MODE_MASKED;
+	else if (strcmp(str, "any") == 0)
+		nmi_mode = NMI_MODE_ANY;
+	else {
+		nmi_mode = NMI_MODE_UNKNOWN;
+		pr_warning("Unknown NMI mode %s\n", str);
+	}
+
+	printk("Set NMI mode to %d\n", nmi_mode);
+	return 0;
+}
+early_param("nmi_mode", nmi_mode_setup);
+
+void __init sdk7786_nmi_init(void)
+{
+	unsigned int source, mask, tmp;
+
+	switch (nmi_mode) {
+	case NMI_MODE_MANUAL:
+		source = NMISR_MAN_NMI;
+		mask = NMIMR_MAN_NMIM;
+		break;
+	case NMI_MODE_AUX:
+		source = NMISR_AUX_NMI;
+		mask = NMIMR_AUX_NMIM;
+		break;
+	case NMI_MODE_ANY:
+		source = NMISR_MAN_NMI | NMISR_AUX_NMI;
+		mask = NMIMR_MAN_NMIM | NMIMR_AUX_NMIM;
+		break;
+	case NMI_MODE_MASKED:
+	case NMI_MODE_UNKNOWN:
+	default:
+		source = mask = 0;
+		break;
+	}
+
+	/* Set the NMI source */
+	tmp = fpga_read_reg(NMISR);
+	tmp &= ~NMISR_MASK;
+	tmp |= source;
+	fpga_write_reg(tmp, NMISR);
+
+	/* And the IRQ masking */
+	fpga_write_reg(NMIMR_MASK ^ mask, NMIMR);
+}
diff --git a/kernel/arch/sh/boards/mach-sdk7786/setup.c b/kernel/arch/sh/boards/mach-sdk7786/setup.c
new file mode 100644
index 000000000..c29268bfd
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-sdk7786/setup.c
@@ -0,0 +1,269 @@
+/*
+ * Renesas Technology Europe SDK7786 Support.
+ *
+ * Copyright (C) 2010  Matt Fleming
+ * Copyright (C) 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/regulator/fixed.h>
+#include <linux/regulator/machine.h>
+#include <linux/smsc911x.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <mach/fpga.h>
+#include <mach/irq.h>
+#include <asm/machvec.h>
+#include <asm/heartbeat.h>
+#include <asm/sizes.h>
+#include <asm/clock.h>
+#include <asm/reboot.h>
+#include <asm/smp-ops.h>
+
+static struct resource heartbeat_resource = {
+	.start		= 0x07fff8b0,
+	.end		= 0x07fff8b0 + sizeof(u16) - 1,
+	.flags		= IORESOURCE_MEM | IORESOURCE_MEM_16BIT,
+};
+
+static struct platform_device heartbeat_device = {
+	.name		= "heartbeat",
+	.id		= -1,
+	.num_resources	= 1,
+	.resource	= &heartbeat_resource,
+};
+
+/* Dummy supplies, where voltage doesn't matter */
+static struct regulator_consumer_supply dummy_supplies[] = {
+	REGULATOR_SUPPLY("vddvario", "smsc911x"),
+	REGULATOR_SUPPLY("vdd33a", "smsc911x"),
+};
+
+static struct resource smsc911x_resources[] = {
+	[0] = {
+		.name		= "smsc911x-memory",
+		.start		= 0x07ffff00,
+		.end		= 0x07ffff00 + SZ_256 - 1,
+		.flags		= IORESOURCE_MEM,
+	},
+	[1] = {
+		.name		= "smsc911x-irq",
+		.start		= evt2irq(0x2c0),
+		.end		= evt2irq(0x2c0),
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct smsc911x_platform_config smsc911x_config = {
+	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
+	.irq_type	= SMSC911X_IRQ_TYPE_OPEN_DRAIN,
+	.flags		= SMSC911X_USE_32BIT,
+	.phy_interface	= PHY_INTERFACE_MODE_MII,
+};
+
+static struct platform_device smsc911x_device = {
+	.name		= "smsc911x",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(smsc911x_resources),
+	.resource	= smsc911x_resources,
+	.dev = {
+		.platform_data = &smsc911x_config,
+	},
+};
+
+static struct resource smbus_fpga_resource = {
+	.start		= 0x07fff9e0,
+	.end		= 0x07fff9e0 + SZ_32 - 1,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device smbus_fpga_device = {
+	.name		= "i2c-sdk7786",
+	.id		= 0,
+	.num_resources	= 1,
+	.resource	= &smbus_fpga_resource,
+};
+
+static struct resource smbus_pcie_resource = {
+	.start		= 0x07fffc30,
+	.end		= 0x07fffc30 + SZ_32 - 1,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device smbus_pcie_device = {
+	.name		= "i2c-sdk7786",
+	.id		= 1,
+	.num_resources	= 1,
+	.resource	= &smbus_pcie_resource,
+};
+
+static struct i2c_board_info __initdata sdk7786_i2c_devices[] = {
+	{
+		I2C_BOARD_INFO("max6900", 0x68),
+	},
+};
+
+static struct platform_device *sh7786_devices[] __initdata = {
+	&heartbeat_device,
+	&smsc911x_device,
+	&smbus_fpga_device,
+	&smbus_pcie_device,
+};
+
+static int sdk7786_i2c_setup(void)
+{
+	unsigned int tmp;
+
+	/*
+	 * Hand over I2C control to the FPGA.
+	 */
+	tmp = fpga_read_reg(SBCR);
+	tmp &= ~SCBR_I2CCEN;
+	tmp |= SCBR_I2CMEN;
+	fpga_write_reg(tmp, SBCR);
+
+	return i2c_register_board_info(0, sdk7786_i2c_devices,
+				       ARRAY_SIZE(sdk7786_i2c_devices));
+}
+
+static int __init sdk7786_devices_setup(void)
+{
+	int ret;
+
+	ret = platform_add_devices(sh7786_devices, ARRAY_SIZE(sh7786_devices));
+	if (unlikely(ret != 0))
+		return ret;
+
+	return sdk7786_i2c_setup();
+}
+device_initcall(sdk7786_devices_setup);
+
+static int sdk7786_mode_pins(void)
+{
+	return fpga_read_reg(MODSWR);
+}
+
+/*
+ * FPGA-driven PCIe clocks
+ *
+ * Historically these include the oscillator, clock B (slots 2/3/4) and
+ * clock A (slot 1 and the CPU clock). Newer revs of the PCB shove
+ * everything under a single PCIe clocks enable bit that happens to map
+ * to the same bit position as the oscillator bit for earlier FPGA
+ * versions.
+ *
+ * Given that the legacy clocks have the side-effect of shutting the CPU
+ * off through the FPGA along with the PCI slots, we simply leave them in
+ * their initial state and don't bother registering them with the clock
+ * framework.
+ */
+static int sdk7786_pcie_clk_enable(struct clk *clk)
+{
+	fpga_write_reg(fpga_read_reg(PCIECR) | PCIECR_CLKEN, PCIECR);
+	return 0;
+}
+
+static void sdk7786_pcie_clk_disable(struct clk *clk)
+{
+	fpga_write_reg(fpga_read_reg(PCIECR) & ~PCIECR_CLKEN, PCIECR);
+}
+
+static struct sh_clk_ops sdk7786_pcie_clk_ops = {
+	.enable		= sdk7786_pcie_clk_enable,
+	.disable	= sdk7786_pcie_clk_disable,
+};
+
+static struct clk sdk7786_pcie_clk = {
+	.ops		= &sdk7786_pcie_clk_ops,
+};
+
+static struct clk_lookup sdk7786_pcie_cl = {
+	.con_id		= "pcie_plat_clk",
+	.clk		= &sdk7786_pcie_clk,
+};
+
+static int sdk7786_clk_init(void)
+{
+	struct clk *clk;
+	int ret;
+
+	/*
+	 * Only handle the EXTAL case, anyone interfacing a crystal
+	 * resonator will need to provide their own input clock.
+	 */
+	if (test_mode_pin(MODE_PIN9))
+		return -EINVAL;
+
+	clk = clk_get(NULL, "extal");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+	ret = clk_set_rate(clk, 33333333);
+	clk_put(clk);
+
+	/*
+	 * Setup the FPGA clocks.
+	 */
+	ret = clk_register(&sdk7786_pcie_clk);
+	if (unlikely(ret)) {
+		pr_err("FPGA clock registration failed\n");
+		return ret;
+	}
+
+	clkdev_add(&sdk7786_pcie_cl);
+
+	return 0;
+}
+
+static void sdk7786_restart(char *cmd)
+{
+	fpga_write_reg(0xa5a5, SRSTR);
+}
+
+static void sdk7786_power_off(void)
+{
+	fpga_write_reg(fpga_read_reg(PWRCR) | PWRCR_PDWNREQ, PWRCR);
+
+	/*
+	 * It can take up to 20us for the R8C to do its job, back off and
+	 * wait a bit until we've been shut off. Even though newer FPGA
+	 * versions don't set the ACK bit, the latency issue remains.
+	 */
+	while ((fpga_read_reg(PWRCR) & PWRCR_PDWNACK) == 0)
+		cpu_sleep();
+}
+
+/* Initialize the board */
+static void __init sdk7786_setup(char **cmdline_p)
+{
+	pr_info("Renesas Technology Europe SDK7786 support:\n");
+
+	regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
+
+	sdk7786_fpga_init();
+	sdk7786_nmi_init();
+
+	pr_info("\tPCB revision:\t%d\n", fpga_read_reg(PCBRR) & 0xf);
+
+	machine_ops.restart = sdk7786_restart;
+	pm_power_off = sdk7786_power_off;
+
+	register_smp_ops(&shx3_smp_ops);
+}
+
+/*
+ * The Machine Vector
+ */
+static struct sh_machine_vector mv_sdk7786 __initmv = {
+	.mv_name		= "SDK7786",
+	.mv_setup		= sdk7786_setup,
+	.mv_mode_pins		= sdk7786_mode_pins,
+	.mv_clk_init		= sdk7786_clk_init,
+	.mv_init_irq		= sdk7786_init_irq,
+};
diff --git a/kernel/arch/sh/boards/mach-sdk7786/sram.c b/kernel/arch/sh/boards/mach-sdk7786/sram.c
new file mode 100644
index 000000000..c81c3abbe
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-sdk7786/sram.c
@@ -0,0 +1,72 @@
+/*
+ * SDK7786 FPGA SRAM Support.
+ *
+ * Copyright (C) 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/io.h>
+#include <linux/string.h>
+#include <mach/fpga.h>
+#include <asm/sram.h>
+#include <asm/sizes.h>
+
+static int __init fpga_sram_init(void)
+{
+	unsigned long phys;
+	unsigned int area;
+	void __iomem *vaddr;
+	int ret;
+	u16 data;
+
+	/* Enable FPGA SRAM */
+	data = fpga_read_reg(LCLASR);
+	data |= LCLASR_FRAMEN;
+	fpga_write_reg(data, LCLASR);
+
+	/*
+	 * FPGA_SEL determines the area mapping
+	 */
+	area = (data & LCLASR_FPGA_SEL_MASK) >> LCLASR_FPGA_SEL_SHIFT;
+	if (unlikely(area == LCLASR_AREA_MASK)) {
+		pr_err("FPGA memory unmapped.\n");
+		return -ENXIO;
+	}
+
+	/*
+	 * The memory itself occupies a 2KiB range at the top of the area
+	 * immediately below the system registers.
+	 */
+	phys = (area << 26) + SZ_64M - SZ_4K;
+
+	/*
+	 * The FPGA SRAM resides in translatable physical space, so set
+	 * up a mapping prior to inserting it in to the pool.
+	 */
+	vaddr = ioremap(phys, SZ_2K);
+	if (unlikely(!vaddr)) {
+		pr_err("Failed remapping FPGA memory.\n");
+		return -ENXIO;
+	}
+
+	pr_info("Adding %dKiB of FPGA memory at 0x%08lx-0x%08lx "
+		"(area %d) to pool.\n",
+		SZ_2K >> 10, phys, phys + SZ_2K - 1, area);
+
+	ret = gen_pool_add(sram_pool, (unsigned long)vaddr, SZ_2K, -1);
+	if (unlikely(ret < 0)) {
+		pr_err("Failed adding memory\n");
+		iounmap(vaddr);
+		return ret;
+	}
+
+	return 0;
+}
+postcore_initcall(fpga_sram_init);