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, 606 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-pxa/lubbock.c b/kernel/arch/arm/mach-pxa/lubbock.c
new file mode 100644
index 000000000..4ac9ab80d
--- /dev/null
+++ b/kernel/arch/arm/mach-pxa/lubbock.c
@@ -0,0 +1,606 @@
+/*
+ *  linux/arch/arm/mach-pxa/lubbock.c
+ *
+ *  Support for the Intel DBPXA250 Development Platform.
+ *
+ *  Author:	Nicolas Pitre
+ *  Created:	Jun 15, 2001
+ *  Copyright:	MontaVista Software Inc.
+ *
+ *  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/gpio.h>
+#include <linux/gpio/machine.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/syscore_ops.h>
+#include <linux/major.h>
+#include <linux/fb.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/smc91x.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
+#include <linux/spi/pxa2xx_spi.h>
+
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include <asm/irq.h>
+#include <asm/sizes.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/flash.h>
+
+#include <asm/hardware/sa1111.h>
+
+#include <mach/pxa25x.h>
+#include <mach/audio.h>
+#include <mach/lubbock.h>
+#include <mach/udc.h>
+#include <linux/platform_data/irda-pxaficp.h>
+#include <linux/platform_data/video-pxafb.h>
+#include <linux/platform_data/mmc-pxamci.h>
+#include <mach/pm.h>
+#include <mach/smemc.h>
+
+#include "generic.h"
+#include "clock.h"
+#include "devices.h"
+
+static unsigned long lubbock_pin_config[] __initdata = {
+	GPIO15_nCS_1,	/* CS1 - Flash */
+	GPIO78_nCS_2,	/* CS2 - Baseboard FGPA */
+	GPIO79_nCS_3,	/* CS3 - SMC ethernet */
+	GPIO80_nCS_4,	/* CS4 - SA1111 */
+
+	/* SSP data pins */
+	GPIO23_SSP1_SCLK,
+	GPIO25_SSP1_TXD,
+	GPIO26_SSP1_RXD,
+
+	/* AC97 */
+	GPIO28_AC97_BITCLK,
+	GPIO29_AC97_SDATA_IN_0,
+	GPIO30_AC97_SDATA_OUT,
+	GPIO31_AC97_SYNC,
+
+	/* LCD - 16bpp DSTN */
+	GPIOxx_LCD_DSTN_16BPP,
+
+	/* BTUART */
+	GPIO42_BTUART_RXD,
+	GPIO43_BTUART_TXD,
+	GPIO44_BTUART_CTS,
+	GPIO45_BTUART_RTS,
+
+	/* PC Card */
+	GPIO48_nPOE,
+	GPIO49_nPWE,
+	GPIO50_nPIOR,
+	GPIO51_nPIOW,
+	GPIO52_nPCE_1,
+	GPIO53_nPCE_2,
+	GPIO54_nPSKTSEL,
+	GPIO55_nPREG,
+	GPIO56_nPWAIT,
+	GPIO57_nIOIS16,
+
+	/* MMC */
+	GPIO6_MMC_CLK,
+	GPIO8_MMC_CS0,
+
+	/* wakeup */
+	GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
+};
+
+#define LUB_HEXLED		__LUB_REG(LUBBOCK_FPGA_PHYS + 0x010)
+#define LUB_MISC_WR		__LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
+
+void lubbock_set_hexled(uint32_t value)
+{
+	LUB_HEXLED = value;
+}
+
+void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(lubbock_set_misc_wr);
+
+static int lubbock_udc_is_connected(void)
+{
+	return (LUB_MISC_RD & (1 << 9)) == 0;
+}
+
+static struct pxa2xx_udc_mach_info udc_info __initdata = {
+	.udc_is_connected	= lubbock_udc_is_connected,
+	// no D+ pullup; lubbock can't connect/disconnect in software
+};
+
+static struct resource sa1111_resources[] = {
+	[0] = {
+		.start	= 0x10000000,
+		.end	= 0x10001fff,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= LUBBOCK_SA1111_IRQ,
+		.end	= LUBBOCK_SA1111_IRQ,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct sa1111_platform_data sa1111_info = {
+	.irq_base	= LUBBOCK_SA1111_IRQ_BASE,
+	.disable_devs	= SA1111_DEVID_SAC,
+};
+
+static struct platform_device sa1111_device = {
+	.name		= "sa1111",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(sa1111_resources),
+	.resource	= sa1111_resources,
+	.dev		= {
+		.platform_data	= &sa1111_info,
+	},
+};
+
+/* ADS7846 is connected through SSP ... and if your board has J5 populated,
+ * you can select it to replace the ucb1400 by switching the touchscreen cable
+ * (to J5) and poking board registers (as done below).  Else it's only useful
+ * for the temperature sensors.
+ */
+static struct pxa2xx_spi_master pxa_ssp_master_info = {
+	.num_chipselect	= 1,
+};
+
+static int lubbock_ads7846_pendown_state(void)
+{
+	/* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
+	return 0;
+}
+
+static struct ads7846_platform_data ads_info = {
+	.model			= 7846,
+	.vref_delay_usecs	= 100,		/* internal, no cap */
+	.get_pendown_state	= lubbock_ads7846_pendown_state,
+	// .x_plate_ohms		= 500,	/* GUESS! */
+	// .y_plate_ohms		= 500,	/* GUESS! */
+};
+
+static void ads7846_cs(u32 command)
+{
+	static const unsigned	TS_nCS = 1 << 11;
+	lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
+}
+
+static struct pxa2xx_spi_chip ads_hw = {
+	.tx_threshold		= 1,
+	.rx_threshold		= 2,
+	.cs_control		= ads7846_cs,
+};
+
+static struct spi_board_info spi_board_info[] __initdata = { {
+	.modalias	= "ads7846",
+	.platform_data	= &ads_info,
+	.controller_data = &ads_hw,
+	.irq		= LUBBOCK_BB_IRQ,
+	.max_speed_hz	= 120000 /* max sample rate at 3V */
+				* 26 /* command + data + overhead */,
+	.bus_num	= 1,
+	.chip_select	= 0,
+},
+};
+
+static struct resource smc91x_resources[] = {
+	[0] = {
+		.name	= "smc91x-regs",
+		.start	= 0x0c000c00,
+		.end	= 0x0c0fffff,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= LUBBOCK_ETH_IRQ,
+		.end	= LUBBOCK_ETH_IRQ,
+		.flags	= IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
+	},
+	[2] = {
+		.name	= "smc91x-attrib",
+		.start	= 0x0e000000,
+		.end	= 0x0e0fffff,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct smc91x_platdata lubbock_smc91x_info = {
+	.flags	= SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
+};
+
+static struct platform_device smc91x_device = {
+	.name		= "smc91x",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(smc91x_resources),
+	.resource	= smc91x_resources,
+	.dev		= {
+		.platform_data = &lubbock_smc91x_info,
+	},
+};
+
+static struct resource flash_resources[] = {
+	[0] = {
+		.start	= 0x00000000,
+		.end	= SZ_64M - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= 0x04000000,
+		.end	= 0x04000000 + SZ_64M - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct mtd_partition lubbock_partitions[] = {
+	{
+		.name =		"Bootloader",
+		.size =		0x00040000,
+		.offset =	0,
+		.mask_flags =	MTD_WRITEABLE  /* force read-only */
+	},{
+		.name =		"Kernel",
+		.size =		0x00100000,
+		.offset =	0x00040000,
+	},{
+		.name =		"Filesystem",
+		.size =		MTDPART_SIZ_FULL,
+		.offset =	0x00140000
+	}
+};
+
+static struct flash_platform_data lubbock_flash_data[2] = {
+	{
+		.map_name	= "cfi_probe",
+		.parts		= lubbock_partitions,
+		.nr_parts	= ARRAY_SIZE(lubbock_partitions),
+	}, {
+		.map_name	= "cfi_probe",
+		.parts		= NULL,
+		.nr_parts	= 0,
+	}
+};
+
+static struct platform_device lubbock_flash_device[2] = {
+	{
+		.name		= "pxa2xx-flash",
+		.id		= 0,
+		.dev = {
+			.platform_data = &lubbock_flash_data[0],
+		},
+		.resource = &flash_resources[0],
+		.num_resources = 1,
+	},
+	{
+		.name		= "pxa2xx-flash",
+		.id		= 1,
+		.dev = {
+			.platform_data = &lubbock_flash_data[1],
+		},
+		.resource = &flash_resources[1],
+		.num_resources = 1,
+	},
+};
+
+static struct resource lubbock_cplds_resources[] = {
+	[0] = {
+		.start	= LUBBOCK_FPGA_PHYS + 0xc0,
+		.end	= LUBBOCK_FPGA_PHYS + 0xe0 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= PXA_GPIO_TO_IRQ(0),
+		.end	= PXA_GPIO_TO_IRQ(0),
+		.flags	= IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
+	},
+	[2] = {
+		.start	= LUBBOCK_IRQ(0),
+		.end	= LUBBOCK_IRQ(6),
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device lubbock_cplds_device = {
+	.name		= "pxa_cplds_irqs",
+	.id		= -1,
+	.resource	= &lubbock_cplds_resources[0],
+	.num_resources	= 3,
+};
+
+
+static struct platform_device *devices[] __initdata = {
+	&sa1111_device,
+	&smc91x_device,
+	&lubbock_flash_device[0],
+	&lubbock_flash_device[1],
+	&lubbock_cplds_device,
+};
+
+static struct pxafb_mode_info sharp_lm8v31_mode = {
+	.pixclock	= 270000,
+	.xres		= 640,
+	.yres		= 480,
+	.bpp		= 16,
+	.hsync_len	= 1,
+	.left_margin	= 3,
+	.right_margin	= 3,
+	.vsync_len	= 1,
+	.upper_margin	= 0,
+	.lower_margin	= 0,
+	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	.cmap_greyscale	= 0,
+};
+
+static struct pxafb_mach_info sharp_lm8v31 = {
+	.modes		= &sharp_lm8v31_mode,
+	.num_modes	= 1,
+	.cmap_inverse	= 0,
+	.cmap_static	= 0,
+	.lcd_conn	= LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
+			  LCD_AC_BIAS_FREQ(255),
+};
+
+#define	MMC_POLL_RATE		msecs_to_jiffies(1000)
+
+static void lubbock_mmc_poll(unsigned long);
+static irq_handler_t mmc_detect_int;
+
+static struct timer_list mmc_timer = {
+	.function	= lubbock_mmc_poll,
+};
+
+static void lubbock_mmc_poll(unsigned long data)
+{
+	unsigned long flags;
+
+	/* clear any previous irq state, then ... */
+	local_irq_save(flags);
+	LUB_IRQ_SET_CLR &= ~(1 << 0);
+	local_irq_restore(flags);
+
+	/* poll until mmc/sd card is removed */
+	if (LUB_IRQ_SET_CLR & (1 << 0))
+		mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
+	else {
+		(void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
+		enable_irq(LUBBOCK_SD_IRQ);
+	}
+}
+
+static irqreturn_t lubbock_detect_int(int irq, void *data)
+{
+	/* IRQ is level triggered; disable, and poll for removal */
+	disable_irq(irq);
+	mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
+
+	return mmc_detect_int(irq, data);
+}
+
+static int lubbock_mci_init(struct device *dev,
+		irq_handler_t detect_int,
+		void *data)
+{
+	/* detect card insert/eject */
+	mmc_detect_int = detect_int;
+	init_timer(&mmc_timer);
+	mmc_timer.data = (unsigned long) data;
+	return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
+			   0, "lubbock-sd-detect", data);
+}
+
+static int lubbock_mci_get_ro(struct device *dev)
+{
+	return (LUB_MISC_RD & (1 << 2)) != 0;
+}
+
+static void lubbock_mci_exit(struct device *dev, void *data)
+{
+	free_irq(LUBBOCK_SD_IRQ, data);
+	del_timer_sync(&mmc_timer);
+}
+
+static struct pxamci_platform_data lubbock_mci_platform_data = {
+	.ocr_mask		= MMC_VDD_32_33|MMC_VDD_33_34,
+	.detect_delay_ms	= 10,
+	.init 			= lubbock_mci_init,
+	.get_ro			= lubbock_mci_get_ro,
+	.exit 			= lubbock_mci_exit,
+	.gpio_card_detect	= -1,
+	.gpio_card_ro		= -1,
+	.gpio_power		= -1,
+};
+
+static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	if (mode & IR_SIRMODE) {
+		LUB_MISC_WR &= ~(1 << 4);
+	} else if (mode & IR_FIRMODE) {
+		LUB_MISC_WR |= 1 << 4;
+	}
+	pxa2xx_transceiver_mode(dev, mode);
+	local_irq_restore(flags);
+}
+
+static struct pxaficp_platform_data lubbock_ficp_platform_data = {
+	.gpio_pwdown		= -1,
+	.transceiver_cap	= IR_SIRMODE | IR_FIRMODE,
+	.transceiver_mode	= lubbock_irda_transceiver_mode,
+};
+
+static void __init lubbock_init(void)
+{
+	int flashboot = (LUB_CONF_SWITCHES & 1);
+
+	pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
+
+	pxa_set_ffuart_info(NULL);
+	pxa_set_btuart_info(NULL);
+	pxa_set_stuart_info(NULL);
+
+	clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
+	pxa_set_udc_info(&udc_info);
+	pxa_set_fb_info(NULL, &sharp_lm8v31);
+	pxa_set_mci_info(&lubbock_mci_platform_data);
+	pxa_set_ficp_info(&lubbock_ficp_platform_data);
+	pxa_set_ac97_info(NULL);
+
+	lubbock_flash_data[0].width = lubbock_flash_data[1].width =
+		(__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
+	/* Compensate for the nROMBT switch which swaps the flash banks */
+	printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
+	       flashboot?"Flash":"ROM", flashboot);
+
+	lubbock_flash_data[flashboot^1].name = "application-flash";
+	lubbock_flash_data[flashboot].name = "boot-rom";
+	(void) platform_add_devices(devices, ARRAY_SIZE(devices));
+
+	pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
+	spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+}
+
+static struct map_desc lubbock_io_desc[] __initdata = {
+  	{	/* CPLD */
+		.virtual	=  LUBBOCK_FPGA_VIRT,
+		.pfn		= __phys_to_pfn(LUBBOCK_FPGA_PHYS),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE
+	}
+};
+
+static void __init lubbock_map_io(void)
+{
+	pxa25x_map_io();
+	iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
+
+	PCFR |= PCFR_OPDE;
+}
+
+/*
+ * Driver for the 8 discrete LEDs available for general use:
+ * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
+ * so be sure to not monkey with them here.
+ */
+
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+struct lubbock_led {
+	struct led_classdev	cdev;
+	u8			mask;
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static const struct {
+	const char *name;
+	const char *trigger;
+} lubbock_leds[] = {
+	{ "lubbock:D28", "default-on", },
+	{ "lubbock:D27", "cpu0", },
+	{ "lubbock:D26", "heartbeat" },
+	{ "lubbock:D25", },
+	{ "lubbock:D24", },
+	{ "lubbock:D23", },
+	{ "lubbock:D22", },
+	{ "lubbock:D21", },
+};
+
+static void lubbock_led_set(struct led_classdev *cdev,
+			      enum led_brightness b)
+{
+	struct lubbock_led *led = container_of(cdev,
+					 struct lubbock_led, cdev);
+	u32 reg = LUB_DISC_BLNK_LED;
+
+	if (b != LED_OFF)
+		reg |= led->mask;
+	else
+		reg &= ~led->mask;
+
+	LUB_DISC_BLNK_LED = reg;
+}
+
+static enum led_brightness lubbock_led_get(struct led_classdev *cdev)
+{
+	struct lubbock_led *led = container_of(cdev,
+					 struct lubbock_led, cdev);
+	u32 reg = LUB_DISC_BLNK_LED;
+
+	return (reg & led->mask) ? LED_FULL : LED_OFF;
+}
+
+static int __init lubbock_leds_init(void)
+{
+	int i;
+
+	if (!machine_is_lubbock())
+		return -ENODEV;
+
+	/* All ON */
+	LUB_DISC_BLNK_LED |= 0xff;
+	for (i = 0; i < ARRAY_SIZE(lubbock_leds); i++) {
+		struct lubbock_led *led;
+
+		led = kzalloc(sizeof(*led), GFP_KERNEL);
+		if (!led)
+			break;
+
+		led->cdev.name = lubbock_leds[i].name;
+		led->cdev.brightness_set = lubbock_led_set;
+		led->cdev.brightness_get = lubbock_led_get;
+		led->cdev.default_trigger = lubbock_leds[i].trigger;
+		led->mask = BIT(i);
+
+		if (led_classdev_register(NULL, &led->cdev) < 0) {
+			kfree(led);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(lubbock_leds_init);
+#endif
+
+MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
+	/* Maintainer: MontaVista Software Inc. */
+	.map_io		= lubbock_map_io,
+	.nr_irqs	= LUBBOCK_NR_IRQS,
+	.init_irq	= pxa25x_init_irq,
+	.handle_irq	= pxa25x_handle_irq,
+	.init_time	= pxa_timer_init,
+	.init_machine	= lubbock_init,
+	.restart	= pxa_restart,
+MACHINE_END