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, 624 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-orion5x/ts78xx-setup.c b/kernel/arch/arm/mach-orion5x/ts78xx-setup.c
new file mode 100644
index 000000000..1b704d35c
--- /dev/null
+++ b/kernel/arch/arm/mach-orion5x/ts78xx-setup.c
@@ -0,0 +1,624 @@
+/*
+ * arch/arm/mach-orion5x/ts78xx-setup.c
+ *
+ * Maintainer: Alexander Clouter <alex@digriz.org.uk>
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/mv643xx_eth.h>
+#include <linux/ata_platform.h>
+#include <linux/m48t86.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/timeriomem-rng.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <mach/orion5x.h>
+#include "common.h"
+#include "mpp.h"
+#include "ts78xx-fpga.h"
+
+/*****************************************************************************
+ * TS-78xx Info
+ ****************************************************************************/
+
+/*
+ * FPGA - lives where the PCI bus would be at ORION5X_PCI_MEM_PHYS_BASE
+ */
+#define TS78XX_FPGA_REGS_PHYS_BASE	0xe8000000
+#define TS78XX_FPGA_REGS_VIRT_BASE	IOMEM(0xff900000)
+#define TS78XX_FPGA_REGS_SIZE		SZ_1M
+
+static struct ts78xx_fpga_data ts78xx_fpga = {
+	.id		= 0,
+	.state		= 1,
+/*	.supports	= ... - populated by ts78xx_fpga_supports() */
+};
+
+/*****************************************************************************
+ * I/O Address Mapping
+ ****************************************************************************/
+static struct map_desc ts78xx_io_desc[] __initdata = {
+	{
+		.virtual	= (unsigned long)TS78XX_FPGA_REGS_VIRT_BASE,
+		.pfn		= __phys_to_pfn(TS78XX_FPGA_REGS_PHYS_BASE),
+		.length		= TS78XX_FPGA_REGS_SIZE,
+		.type		= MT_DEVICE,
+	},
+};
+
+static void __init ts78xx_map_io(void)
+{
+	orion5x_map_io();
+	iotable_init(ts78xx_io_desc, ARRAY_SIZE(ts78xx_io_desc));
+}
+
+/*****************************************************************************
+ * Ethernet
+ ****************************************************************************/
+static struct mv643xx_eth_platform_data ts78xx_eth_data = {
+	.phy_addr	= MV643XX_ETH_PHY_ADDR(0),
+};
+
+/*****************************************************************************
+ * SATA
+ ****************************************************************************/
+static struct mv_sata_platform_data ts78xx_sata_data = {
+	.n_ports	= 2,
+};
+
+/*****************************************************************************
+ * RTC M48T86 - nicked^Wborrowed from arch/arm/mach-ep93xx/ts72xx.c
+ ****************************************************************************/
+#define TS_RTC_CTRL	(TS78XX_FPGA_REGS_VIRT_BASE + 0x808)
+#define TS_RTC_DATA	(TS78XX_FPGA_REGS_VIRT_BASE + 0x80c)
+
+static unsigned char ts78xx_ts_rtc_readbyte(unsigned long addr)
+{
+	writeb(addr, TS_RTC_CTRL);
+	return readb(TS_RTC_DATA);
+}
+
+static void ts78xx_ts_rtc_writebyte(unsigned char value, unsigned long addr)
+{
+	writeb(addr, TS_RTC_CTRL);
+	writeb(value, TS_RTC_DATA);
+}
+
+static struct m48t86_ops ts78xx_ts_rtc_ops = {
+	.readbyte	= ts78xx_ts_rtc_readbyte,
+	.writebyte	= ts78xx_ts_rtc_writebyte,
+};
+
+static struct platform_device ts78xx_ts_rtc_device = {
+	.name		= "rtc-m48t86",
+	.id		= -1,
+	.dev		= {
+		.platform_data	= &ts78xx_ts_rtc_ops,
+	},
+	.num_resources	= 0,
+};
+
+/*
+ * TS uses some of the user storage space on the RTC chip so see if it is
+ * present; as it's an optional feature at purchase time and not all boards
+ * will have it present
+ *
+ * I've used the method TS use in their rtc7800.c example for the detection
+ *
+ * TODO: track down a guinea pig without an RTC to see if we can work out a
+ *		better RTC detection routine
+ */
+static int ts78xx_ts_rtc_load(void)
+{
+	int rc;
+	unsigned char tmp_rtc0, tmp_rtc1;
+
+	tmp_rtc0 = ts78xx_ts_rtc_readbyte(126);
+	tmp_rtc1 = ts78xx_ts_rtc_readbyte(127);
+
+	ts78xx_ts_rtc_writebyte(0x00, 126);
+	ts78xx_ts_rtc_writebyte(0x55, 127);
+	if (ts78xx_ts_rtc_readbyte(127) == 0x55) {
+		ts78xx_ts_rtc_writebyte(0xaa, 127);
+		if (ts78xx_ts_rtc_readbyte(127) == 0xaa
+				&& ts78xx_ts_rtc_readbyte(126) == 0x00) {
+			ts78xx_ts_rtc_writebyte(tmp_rtc0, 126);
+			ts78xx_ts_rtc_writebyte(tmp_rtc1, 127);
+
+			if (ts78xx_fpga.supports.ts_rtc.init == 0) {
+				rc = platform_device_register(&ts78xx_ts_rtc_device);
+				if (!rc)
+					ts78xx_fpga.supports.ts_rtc.init = 1;
+			} else
+				rc = platform_device_add(&ts78xx_ts_rtc_device);
+
+			if (rc)
+				pr_info("RTC could not be registered: %d\n",
+					rc);
+			return rc;
+		}
+	}
+
+	pr_info("RTC not found\n");
+	return -ENODEV;
+};
+
+static void ts78xx_ts_rtc_unload(void)
+{
+	platform_device_del(&ts78xx_ts_rtc_device);
+}
+
+/*****************************************************************************
+ * NAND Flash
+ ****************************************************************************/
+#define TS_NAND_CTRL	(TS78XX_FPGA_REGS_VIRT_BASE + 0x800)	/* VIRT */
+#define TS_NAND_DATA	(TS78XX_FPGA_REGS_PHYS_BASE + 0x804)	/* PHYS */
+
+/*
+ * hardware specific access to control-lines
+ *
+ * ctrl:
+ * NAND_NCE: bit 0 -> bit 2
+ * NAND_CLE: bit 1 -> bit 1
+ * NAND_ALE: bit 2 -> bit 0
+ */
+static void ts78xx_ts_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
+			unsigned int ctrl)
+{
+	struct nand_chip *this = mtd->priv;
+
+	if (ctrl & NAND_CTRL_CHANGE) {
+		unsigned char bits;
+
+		bits = (ctrl & NAND_NCE) << 2;
+		bits |= ctrl & NAND_CLE;
+		bits |= (ctrl & NAND_ALE) >> 2;
+
+		writeb((readb(TS_NAND_CTRL) & ~0x7) | bits, TS_NAND_CTRL);
+	}
+
+	if (cmd != NAND_CMD_NONE)
+		writeb(cmd, this->IO_ADDR_W);
+}
+
+static int ts78xx_ts_nand_dev_ready(struct mtd_info *mtd)
+{
+	return readb(TS_NAND_CTRL) & 0x20;
+}
+
+static void ts78xx_ts_nand_write_buf(struct mtd_info *mtd,
+			const uint8_t *buf, int len)
+{
+	struct nand_chip *chip = mtd->priv;
+	void __iomem *io_base = chip->IO_ADDR_W;
+	unsigned long off = ((unsigned long)buf & 3);
+	int sz;
+
+	if (off) {
+		sz = min_t(int, 4 - off, len);
+		writesb(io_base, buf, sz);
+		buf += sz;
+		len -= sz;
+	}
+
+	sz = len >> 2;
+	if (sz) {
+		u32 *buf32 = (u32 *)buf;
+		writesl(io_base, buf32, sz);
+		buf += sz << 2;
+		len -= sz << 2;
+	}
+
+	if (len)
+		writesb(io_base, buf, len);
+}
+
+static void ts78xx_ts_nand_read_buf(struct mtd_info *mtd,
+			uint8_t *buf, int len)
+{
+	struct nand_chip *chip = mtd->priv;
+	void __iomem *io_base = chip->IO_ADDR_R;
+	unsigned long off = ((unsigned long)buf & 3);
+	int sz;
+
+	if (off) {
+		sz = min_t(int, 4 - off, len);
+		readsb(io_base, buf, sz);
+		buf += sz;
+		len -= sz;
+	}
+
+	sz = len >> 2;
+	if (sz) {
+		u32 *buf32 = (u32 *)buf;
+		readsl(io_base, buf32, sz);
+		buf += sz << 2;
+		len -= sz << 2;
+	}
+
+	if (len)
+		readsb(io_base, buf, len);
+}
+
+static struct mtd_partition ts78xx_ts_nand_parts[] = {
+	{
+		.name		= "mbr",
+		.offset		= 0,
+		.size		= SZ_128K,
+		.mask_flags	= MTD_WRITEABLE,
+	}, {
+		.name		= "kernel",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_4M,
+	}, {
+		.name		= "initrd",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= SZ_4M,
+	}, {
+		.name		= "rootfs",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= MTDPART_SIZ_FULL,
+	}
+};
+
+static struct platform_nand_data ts78xx_ts_nand_data = {
+	.chip	= {
+		.nr_chips		= 1,
+		.partitions		= ts78xx_ts_nand_parts,
+		.nr_partitions		= ARRAY_SIZE(ts78xx_ts_nand_parts),
+		.chip_delay		= 15,
+		.bbt_options		= NAND_BBT_USE_FLASH,
+	},
+	.ctrl	= {
+		/*
+		 * The HW ECC offloading functions, used to give about a 9%
+		 * performance increase for 'dd if=/dev/mtdblockX' and 5% for
+		 * nanddump.  This all however was changed by git commit
+		 * e6cf5df1838c28bb060ac45b5585e48e71bbc740 so now there is
+		 * no performance advantage to be had so we no longer bother
+		 */
+		.cmd_ctrl		= ts78xx_ts_nand_cmd_ctrl,
+		.dev_ready		= ts78xx_ts_nand_dev_ready,
+		.write_buf		= ts78xx_ts_nand_write_buf,
+		.read_buf		= ts78xx_ts_nand_read_buf,
+	},
+};
+
+static struct resource ts78xx_ts_nand_resources
+			= DEFINE_RES_MEM(TS_NAND_DATA, 4);
+
+static struct platform_device ts78xx_ts_nand_device = {
+	.name		= "gen_nand",
+	.id		= -1,
+	.dev		= {
+		.platform_data	= &ts78xx_ts_nand_data,
+	},
+	.resource	= &ts78xx_ts_nand_resources,
+	.num_resources	= 1,
+};
+
+static int ts78xx_ts_nand_load(void)
+{
+	int rc;
+
+	if (ts78xx_fpga.supports.ts_nand.init == 0) {
+		rc = platform_device_register(&ts78xx_ts_nand_device);
+		if (!rc)
+			ts78xx_fpga.supports.ts_nand.init = 1;
+	} else
+		rc = platform_device_add(&ts78xx_ts_nand_device);
+
+	if (rc)
+		pr_info("NAND could not be registered: %d\n", rc);
+	return rc;
+};
+
+static void ts78xx_ts_nand_unload(void)
+{
+	platform_device_del(&ts78xx_ts_nand_device);
+}
+
+/*****************************************************************************
+ * HW RNG
+ ****************************************************************************/
+#define TS_RNG_DATA	(TS78XX_FPGA_REGS_PHYS_BASE | 0x044)
+
+static struct resource ts78xx_ts_rng_resource
+			= DEFINE_RES_MEM(TS_RNG_DATA, 4);
+
+static struct timeriomem_rng_data ts78xx_ts_rng_data = {
+	.period		= 1000000, /* one second */
+};
+
+static struct platform_device ts78xx_ts_rng_device = {
+	.name		= "timeriomem_rng",
+	.id		= -1,
+	.dev		= {
+		.platform_data	= &ts78xx_ts_rng_data,
+	},
+	.resource	= &ts78xx_ts_rng_resource,
+	.num_resources	= 1,
+};
+
+static int ts78xx_ts_rng_load(void)
+{
+	int rc;
+
+	if (ts78xx_fpga.supports.ts_rng.init == 0) {
+		rc = platform_device_register(&ts78xx_ts_rng_device);
+		if (!rc)
+			ts78xx_fpga.supports.ts_rng.init = 1;
+	} else
+		rc = platform_device_add(&ts78xx_ts_rng_device);
+
+	if (rc)
+		pr_info("RNG could not be registered: %d\n", rc);
+	return rc;
+};
+
+static void ts78xx_ts_rng_unload(void)
+{
+	platform_device_del(&ts78xx_ts_rng_device);
+}
+
+/*****************************************************************************
+ * FPGA 'hotplug' support code
+ ****************************************************************************/
+static void ts78xx_fpga_devices_zero_init(void)
+{
+	ts78xx_fpga.supports.ts_rtc.init = 0;
+	ts78xx_fpga.supports.ts_nand.init = 0;
+	ts78xx_fpga.supports.ts_rng.init = 0;
+}
+
+static void ts78xx_fpga_supports(void)
+{
+	/* TODO: put this 'table' into ts78xx-fpga.h */
+	switch (ts78xx_fpga.id) {
+	case TS7800_REV_1:
+	case TS7800_REV_2:
+	case TS7800_REV_3:
+	case TS7800_REV_4:
+	case TS7800_REV_5:
+	case TS7800_REV_6:
+	case TS7800_REV_7:
+	case TS7800_REV_8:
+	case TS7800_REV_9:
+		ts78xx_fpga.supports.ts_rtc.present = 1;
+		ts78xx_fpga.supports.ts_nand.present = 1;
+		ts78xx_fpga.supports.ts_rng.present = 1;
+		break;
+	default:
+		/* enable devices if magic matches */
+		switch ((ts78xx_fpga.id >> 8) & 0xffffff) {
+		case TS7800_FPGA_MAGIC:
+			pr_warn("unrecognised FPGA revision 0x%.2x\n",
+				ts78xx_fpga.id & 0xff);
+			ts78xx_fpga.supports.ts_rtc.present = 1;
+			ts78xx_fpga.supports.ts_nand.present = 1;
+			ts78xx_fpga.supports.ts_rng.present = 1;
+			break;
+		default:
+			ts78xx_fpga.supports.ts_rtc.present = 0;
+			ts78xx_fpga.supports.ts_nand.present = 0;
+			ts78xx_fpga.supports.ts_rng.present = 0;
+		}
+	}
+}
+
+static int ts78xx_fpga_load_devices(void)
+{
+	int tmp, ret = 0;
+
+	if (ts78xx_fpga.supports.ts_rtc.present == 1) {
+		tmp = ts78xx_ts_rtc_load();
+		if (tmp)
+			ts78xx_fpga.supports.ts_rtc.present = 0;
+		ret |= tmp;
+	}
+	if (ts78xx_fpga.supports.ts_nand.present == 1) {
+		tmp = ts78xx_ts_nand_load();
+		if (tmp)
+			ts78xx_fpga.supports.ts_nand.present = 0;
+		ret |= tmp;
+	}
+	if (ts78xx_fpga.supports.ts_rng.present == 1) {
+		tmp = ts78xx_ts_rng_load();
+		if (tmp)
+			ts78xx_fpga.supports.ts_rng.present = 0;
+		ret |= tmp;
+	}
+
+	return ret;
+}
+
+static int ts78xx_fpga_unload_devices(void)
+{
+	int ret = 0;
+
+	if (ts78xx_fpga.supports.ts_rtc.present == 1)
+		ts78xx_ts_rtc_unload();
+	if (ts78xx_fpga.supports.ts_nand.present == 1)
+		ts78xx_ts_nand_unload();
+	if (ts78xx_fpga.supports.ts_rng.present == 1)
+		ts78xx_ts_rng_unload();
+
+	return ret;
+}
+
+static int ts78xx_fpga_load(void)
+{
+	ts78xx_fpga.id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
+
+	pr_info("FPGA magic=0x%.6x, rev=0x%.2x\n",
+			(ts78xx_fpga.id >> 8) & 0xffffff,
+			ts78xx_fpga.id & 0xff);
+
+	ts78xx_fpga_supports();
+
+	if (ts78xx_fpga_load_devices()) {
+		ts78xx_fpga.state = -1;
+		return -EBUSY;
+	}
+
+	return 0;
+};
+
+static int ts78xx_fpga_unload(void)
+{
+	unsigned int fpga_id;
+
+	fpga_id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
+
+	/*
+	 * There does not seem to be a feasible way to block access to the GPIO
+	 * pins from userspace (/dev/mem).  This if clause should hopefully warn
+	 * those foolish enough not to follow 'policy' :)
+	 *
+	 * UrJTAG SVN since r1381 can be used to reprogram the FPGA
+	 */
+	if (ts78xx_fpga.id != fpga_id) {
+		pr_err("FPGA magic/rev mismatch\n"
+			"TS-78xx FPGA: was 0x%.6x/%.2x but now 0x%.6x/%.2x\n",
+			(ts78xx_fpga.id >> 8) & 0xffffff, ts78xx_fpga.id & 0xff,
+			(fpga_id >> 8) & 0xffffff, fpga_id & 0xff);
+		ts78xx_fpga.state = -1;
+		return -EBUSY;
+	}
+
+	if (ts78xx_fpga_unload_devices()) {
+		ts78xx_fpga.state = -1;
+		return -EBUSY;
+	}
+
+	return 0;
+};
+
+static ssize_t ts78xx_fpga_show(struct kobject *kobj,
+			struct kobj_attribute *attr, char *buf)
+{
+	if (ts78xx_fpga.state < 0)
+		return sprintf(buf, "borked\n");
+
+	return sprintf(buf, "%s\n", (ts78xx_fpga.state) ? "online" : "offline");
+}
+
+static ssize_t ts78xx_fpga_store(struct kobject *kobj,
+			struct kobj_attribute *attr, const char *buf, size_t n)
+{
+	int value, ret;
+
+	if (ts78xx_fpga.state < 0) {
+		pr_err("FPGA borked, you must powercycle ASAP\n");
+		return -EBUSY;
+	}
+
+	if (strncmp(buf, "online", sizeof("online") - 1) == 0)
+		value = 1;
+	else if (strncmp(buf, "offline", sizeof("offline") - 1) == 0)
+		value = 0;
+	else
+		return -EINVAL;
+
+	if (ts78xx_fpga.state == value)
+		return n;
+
+	ret = (ts78xx_fpga.state == 0)
+		? ts78xx_fpga_load()
+		: ts78xx_fpga_unload();
+
+	if (!(ret < 0))
+		ts78xx_fpga.state = value;
+
+	return n;
+}
+
+static struct kobj_attribute ts78xx_fpga_attr =
+	__ATTR(ts78xx_fpga, 0644, ts78xx_fpga_show, ts78xx_fpga_store);
+
+/*****************************************************************************
+ * General Setup
+ ****************************************************************************/
+static unsigned int ts78xx_mpp_modes[] __initdata = {
+	MPP0_UNUSED,
+	MPP1_GPIO,		/* JTAG Clock */
+	MPP2_GPIO,		/* JTAG Data In */
+	MPP3_GPIO,		/* Lat ECP2 256 FPGA - PB2B */
+	MPP4_GPIO,		/* JTAG Data Out */
+	MPP5_GPIO,		/* JTAG TMS */
+	MPP6_GPIO,		/* Lat ECP2 256 FPGA - PB31A_CLK4+ */
+	MPP7_GPIO,		/* Lat ECP2 256 FPGA - PB22B */
+	MPP8_UNUSED,
+	MPP9_UNUSED,
+	MPP10_UNUSED,
+	MPP11_UNUSED,
+	MPP12_UNUSED,
+	MPP13_UNUSED,
+	MPP14_UNUSED,
+	MPP15_UNUSED,
+	MPP16_UART,
+	MPP17_UART,
+	MPP18_UART,
+	MPP19_UART,
+	/*
+	 * MPP[20] PCI Clock Out 1
+	 * MPP[21] PCI Clock Out 0
+	 * MPP[22] Unused
+	 * MPP[23] Unused
+	 * MPP[24] Unused
+	 * MPP[25] Unused
+	 */
+	0,
+};
+
+static void __init ts78xx_init(void)
+{
+	int ret;
+
+	/*
+	 * Setup basic Orion functions. Need to be called early.
+	 */
+	orion5x_init();
+
+	orion5x_mpp_conf(ts78xx_mpp_modes);
+
+	/*
+	 * Configure peripherals.
+	 */
+	orion5x_ehci0_init();
+	orion5x_ehci1_init();
+	orion5x_eth_init(&ts78xx_eth_data);
+	orion5x_sata_init(&ts78xx_sata_data);
+	orion5x_uart0_init();
+	orion5x_uart1_init();
+	orion5x_xor_init();
+
+	/* FPGA init */
+	ts78xx_fpga_devices_zero_init();
+	ret = ts78xx_fpga_load();
+	ret = sysfs_create_file(firmware_kobj, &ts78xx_fpga_attr.attr);
+	if (ret)
+		pr_err("sysfs_create_file failed: %d\n", ret);
+}
+
+MACHINE_START(TS78XX, "Technologic Systems TS-78xx SBC")
+	/* Maintainer: Alexander Clouter <alex@digriz.org.uk> */
+	.atag_offset	= 0x100,
+	.init_machine	= ts78xx_init,
+	.map_io		= ts78xx_map_io,
+	.init_early	= orion5x_init_early,
+	.init_irq	= orion5x_init_irq,
+	.init_time	= orion5x_timer_init,
+	.restart	= orion5x_restart,
+MACHINE_END