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, 361 insertions, 0 deletions

diff --git a/kernel/arch/blackfin/mach-bf609/pm.c b/kernel/arch/blackfin/mach-bf609/pm.c
new file mode 100644
index 000000000..b1bfcf434
--- /dev/null
+++ b/kernel/arch/blackfin/mach-bf609/pm.c
@@ -0,0 +1,361 @@
+/*
+ * Blackfin bf609 power management
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2
+ */
+
+#include <linux/suspend.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/syscore_ops.h>
+
+#include <asm/dpmc.h>
+#include <asm/pm.h>
+#include <mach/pm.h>
+#include <asm/blackfin.h>
+#include <asm/mem_init.h>
+
+/***********************************************************/
+/*                                                         */
+/* Wakeup Actions for DPM_RESTORE                          */
+/*                                                         */
+/***********************************************************/
+#define BITP_ROM_WUA_CHKHDR             24
+#define BITP_ROM_WUA_DDRLOCK            7
+#define BITP_ROM_WUA_DDRDLLEN           6
+#define BITP_ROM_WUA_DDR                5
+#define BITP_ROM_WUA_CGU                4
+#define BITP_ROM_WUA_MEMBOOT            2
+#define BITP_ROM_WUA_EN                 1
+
+#define BITM_ROM_WUA_CHKHDR             (0xFF000000)
+#define ENUM_ROM_WUA_CHKHDR_AD                  0xAD000000
+
+#define BITM_ROM_WUA_DDRLOCK            (0x00000080)
+#define BITM_ROM_WUA_DDRDLLEN           (0x00000040)
+#define BITM_ROM_WUA_DDR                (0x00000020)
+#define BITM_ROM_WUA_CGU                (0x00000010)
+#define BITM_ROM_WUA_MEMBOOT            (0x00000002)
+#define BITM_ROM_WUA_EN                 (0x00000001)
+
+/***********************************************************/
+/*                                                         */
+/* Syscontrol                                              */
+/*                                                         */
+/***********************************************************/
+#define BITP_ROM_SYSCTRL_CGU_LOCKINGEN  28    /* unlocks CGU_CTL register */
+#define BITP_ROM_SYSCTRL_WUA_OVERRIDE   24
+#define BITP_ROM_SYSCTRL_WUA_DDRDLLEN   20    /* Saves the DDR DLL and PADS registers to the DPM registers */
+#define BITP_ROM_SYSCTRL_WUA_DDR        19    /* Saves the DDR registers to the DPM registers */
+#define BITP_ROM_SYSCTRL_WUA_CGU        18    /* Saves the CGU registers into DPM registers */
+#define BITP_ROM_SYSCTRL_WUA_DPMWRITE   17    /* Saves the Syscontrol structure structure contents into DPM registers */
+#define BITP_ROM_SYSCTRL_WUA_EN         16    /* reads current PLL and DDR configuration into structure */
+#define BITP_ROM_SYSCTRL_DDR_WRITE      13    /* writes the DDR registers from Syscontrol structure for wakeup initialization of DDR */
+#define BITP_ROM_SYSCTRL_DDR_READ       12    /* Read the DDR registers into the Syscontrol structure for storing prior to hibernate */
+#define BITP_ROM_SYSCTRL_CGU_AUTODIS    11    /* Disables auto handling of UPDT and ALGN fields */
+#define BITP_ROM_SYSCTRL_CGU_CLKOUTSEL  7    /* access CGU_CLKOUTSEL register */
+#define BITP_ROM_SYSCTRL_CGU_DIV        6    /* access CGU_DIV register */
+#define BITP_ROM_SYSCTRL_CGU_STAT       5    /* access CGU_STAT register */
+#define BITP_ROM_SYSCTRL_CGU_CTL        4    /* access CGU_CTL register */
+#define BITP_ROM_SYSCTRL_CGU_RTNSTAT    2    /* Update structure STAT field upon error */
+#define BITP_ROM_SYSCTRL_WRITE          1    /* write registers */
+#define BITP_ROM_SYSCTRL_READ           0    /* read registers */
+
+#define BITM_ROM_SYSCTRL_CGU_READ       (0x00000001)    /* Read CGU registers */
+#define BITM_ROM_SYSCTRL_CGU_WRITE      (0x00000002)    /* Write registers */
+#define BITM_ROM_SYSCTRL_CGU_RTNSTAT    (0x00000004)    /* Update structure STAT field upon error or after a write operation */
+#define BITM_ROM_SYSCTRL_CGU_CTL        (0x00000010)    /* Access CGU_CTL register */
+#define BITM_ROM_SYSCTRL_CGU_STAT       (0x00000020)    /* Access CGU_STAT register */
+#define BITM_ROM_SYSCTRL_CGU_DIV        (0x00000040)    /* Access CGU_DIV register */
+#define BITM_ROM_SYSCTRL_CGU_CLKOUTSEL  (0x00000080)    /* Access CGU_CLKOUTSEL register */
+#define BITM_ROM_SYSCTRL_CGU_AUTODIS    (0x00000800)    /* Disables auto handling of UPDT and ALGN fields */
+#define BITM_ROM_SYSCTRL_DDR_READ       (0x00001000)    /* Reads the contents of the DDR registers and stores them into the structure */
+#define BITM_ROM_SYSCTRL_DDR_WRITE      (0x00002000)    /* Writes the DDR registers from the structure, only really intented for wakeup functionality and not for full DDR configuration */
+#define BITM_ROM_SYSCTRL_WUA_EN         (0x00010000)    /* Wakeup entry or exit opertation enable */
+#define BITM_ROM_SYSCTRL_WUA_DPMWRITE   (0x00020000)    /* When set indicates a restore of the PLL and DDR is to be performed otherwise a save is required */
+#define BITM_ROM_SYSCTRL_WUA_CGU        (0x00040000)    /* Only applicable for a PLL and DDR save operation to the DPM, saves the current settings if cleared or the contents of the structure if set */
+#define BITM_ROM_SYSCTRL_WUA_DDR        (0x00080000)    /* Only applicable for a PLL and DDR save operation to the DPM, saves the current settings if cleared or the contents of the structure if set */
+#define BITM_ROM_SYSCTRL_WUA_DDRDLLEN   (0x00100000)    /* Enables saving/restoring of the DDR DLLCTL register */
+#define BITM_ROM_SYSCTRL_WUA_OVERRIDE   (0x01000000)
+#define BITM_ROM_SYSCTRL_CGU_LOCKINGEN  (0x10000000)    /* Unlocks the CGU_CTL register */
+
+
+/* Structures for the syscontrol() function */
+struct STRUCT_ROM_SYSCTRL {
+	uint32_t ulCGU_CTL;
+	uint32_t ulCGU_STAT;
+	uint32_t ulCGU_DIV;
+	uint32_t ulCGU_CLKOUTSEL;
+	uint32_t ulWUA_Flags;
+	uint32_t ulWUA_BootAddr;
+	uint32_t ulWUA_User;
+	uint32_t ulDDR_CTL;
+	uint32_t ulDDR_CFG;
+	uint32_t ulDDR_TR0;
+	uint32_t ulDDR_TR1;
+	uint32_t ulDDR_TR2;
+	uint32_t ulDDR_MR;
+	uint32_t ulDDR_EMR1;
+	uint32_t ulDDR_EMR2;
+	uint32_t ulDDR_PADCTL;
+	uint32_t ulDDR_DLLCTL;
+	uint32_t ulReserved;
+};
+
+struct bfin_pm_data {
+	uint32_t magic;
+	uint32_t resume_addr;
+	uint32_t sp;
+};
+
+struct bfin_pm_data bf609_pm_data;
+
+struct STRUCT_ROM_SYSCTRL configvalues;
+uint32_t dactionflags;
+
+#define FUNC_ROM_SYSCONTROL 0xC8000080
+__attribute__((l1_data))
+static uint32_t (* const bfrom_SysControl)(uint32_t action_flags, struct STRUCT_ROM_SYSCTRL *settings, void *reserved) = (void *)FUNC_ROM_SYSCONTROL;
+
+__attribute__((l1_text))
+void bfin_cpu_suspend(void)
+{
+	__asm__ __volatile__( \
+			".align 8;" \
+			"idle;" \
+			: : \
+			);
+}
+
+__attribute__((l1_text))
+void bf609_ddr_sr(void)
+{
+	dmc_enter_self_refresh();
+}
+
+__attribute__((l1_text))
+void bf609_ddr_sr_exit(void)
+{
+	dmc_exit_self_refresh();
+
+	/* After wake up from deep sleep and exit DDR from self refress mode,
+	 * should wait till CGU PLL is locked.
+	 */
+	while (bfin_read32(CGU0_STAT) & CLKSALGN)
+		continue;
+}
+
+__attribute__((l1_text))
+void bf609_resume_ccbuf(void)
+{
+	bfin_write32(DPM0_CCBF_EN, 3);
+	bfin_write32(DPM0_CTL, 2);
+
+	while ((bfin_read32(DPM0_STAT) & 0xf) != 1);
+}
+
+__attribute__((l1_text))
+void bfin_hibernate_syscontrol(void)
+{
+	configvalues.ulWUA_Flags = (0xAD000000 | BITM_ROM_WUA_EN
+		| BITM_ROM_WUA_CGU | BITM_ROM_WUA_DDR | BITM_ROM_WUA_DDRDLLEN);
+
+	dactionflags = (BITM_ROM_SYSCTRL_WUA_EN
+		| BITM_ROM_SYSCTRL_WUA_DPMWRITE | BITM_ROM_SYSCTRL_WUA_CGU
+		| BITM_ROM_SYSCTRL_WUA_DDR | BITM_ROM_SYSCTRL_WUA_DDRDLLEN);
+
+	bfrom_SysControl(dactionflags, &configvalues, NULL);
+
+	bfin_write32(DPM0_RESTORE5, bfin_read32(DPM0_RESTORE5) | 4);
+}
+
+asmlinkage void enter_deepsleep(void);
+
+__attribute__((l1_text))
+void bfin_deepsleep(unsigned long mask, unsigned long pol_mask)
+{
+	bfin_write32(DPM0_WAKE_EN, mask);
+	bfin_write32(DPM0_WAKE_POL, pol_mask);
+	SSYNC();
+	enter_deepsleep();
+}
+
+void bfin_hibernate(unsigned long mask, unsigned long pol_mask)
+{
+	bfin_write32(DPM0_WAKE_EN, mask);
+	bfin_write32(DPM0_WAKE_POL, pol_mask);
+	bfin_write32(DPM0_PGCNTR, 0x0000FFFF);
+	bfin_write32(DPM0_HIB_DIS, 0xFFFF);
+
+	bf609_hibernate();
+}
+
+void bf609_cpu_pm_enter(suspend_state_t state)
+{
+	int error;
+	unsigned long wakeup = 0;
+	unsigned long wakeup_pol = 0;
+
+#ifdef CONFIG_PM_BFIN_WAKE_PA15
+	wakeup |= PA15WE;
+# if CONFIG_PM_BFIN_WAKE_PA15_POL
+	wakeup_pol |= PA15WE;
+# endif
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_PB15
+	wakeup |= PB15WE;
+# if CONFIG_PM_BFIN_WAKE_PB15_POL
+	wakeup_pol |= PB15WE;
+# endif
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_PC15
+	wakeup |= PC15WE;
+# if CONFIG_PM_BFIN_WAKE_PC15_POL
+	wakeup_pol |= PC15WE;
+# endif
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_PD06
+	wakeup |= PD06WE;
+# if CONFIG_PM_BFIN_WAKE_PD06_POL
+	wakeup_pol |= PD06WE;
+# endif
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_PE12
+	wakeup |= PE12WE;
+# if CONFIG_PM_BFIN_WAKE_PE12_POL
+	wakeup_pol |= PE12WE;
+# endif
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_PG04
+	wakeup |= PG04WE;
+# if CONFIG_PM_BFIN_WAKE_PG04_POL
+	wakeup_pol |= PG04WE;
+# endif
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_PG13
+	wakeup |= PG13WE;
+# if CONFIG_PM_BFIN_WAKE_PG13_POL
+	wakeup_pol |= PG13WE;
+# endif
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_USB
+	wakeup |= USBWE;
+# if CONFIG_PM_BFIN_WAKE_USB_POL
+	wakeup_pol |= USBWE;
+# endif
+#endif
+
+	error = irq_set_irq_wake(255, 1);
+	if(error < 0)
+		printk(KERN_DEBUG "Unable to get irq wake\n");
+	error = irq_set_irq_wake(231, 1);
+	if (error < 0)
+		printk(KERN_DEBUG "Unable to get irq wake\n");
+
+	if (state == PM_SUSPEND_STANDBY)
+		bfin_deepsleep(wakeup, wakeup_pol);
+	else {
+		bfin_hibernate(wakeup, wakeup_pol);
+	}
+
+}
+
+int bf609_cpu_pm_prepare(void)
+{
+	return 0;
+}
+
+void bf609_cpu_pm_finish(void)
+{
+
+}
+
+static struct bfin_cpu_pm_fns bf609_cpu_pm = {
+	.enter          = bf609_cpu_pm_enter,
+	.prepare        = bf609_cpu_pm_prepare,
+	.finish         = bf609_cpu_pm_finish,
+};
+
+#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
+static int smc_pm_syscore_suspend(void)
+{
+	bf609_nor_flash_exit(NULL);
+	return 0;
+}
+
+static void smc_pm_syscore_resume(void)
+{
+	bf609_nor_flash_init(NULL);
+}
+
+static struct syscore_ops smc_pm_syscore_ops = {
+	.suspend        = smc_pm_syscore_suspend,
+	.resume         = smc_pm_syscore_resume,
+};
+#endif
+
+static irqreturn_t test_isr(int irq, void *dev_id)
+{
+	printk(KERN_DEBUG "gpio irq %d\n", irq);
+	if (irq == 231)
+		bfin_sec_raise_irq(BFIN_SYSIRQ(IRQ_SOFT1));
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t dpm0_isr(int irq, void *dev_id)
+{
+	bfin_write32(DPM0_WAKE_STAT, bfin_read32(DPM0_WAKE_STAT));
+	bfin_write32(CGU0_STAT, bfin_read32(CGU0_STAT));
+	return IRQ_HANDLED;
+}
+
+static int __init bf609_init_pm(void)
+{
+	int irq;
+	int error;
+
+#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
+	register_syscore_ops(&smc_pm_syscore_ops);
+#endif
+
+#ifdef CONFIG_PM_BFIN_WAKE_PE12
+	irq = gpio_to_irq(GPIO_PE12);
+	if (irq < 0) {
+		error = irq;
+		printk(KERN_DEBUG "Unable to get irq number for GPIO %d, error %d\n",
+				GPIO_PE12, error);
+	}
+
+	error = request_irq(irq, test_isr, IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND
+				| IRQF_FORCE_RESUME, "gpiope12", NULL);
+	if(error < 0)
+		printk(KERN_DEBUG "Unable to get irq\n");
+#endif
+
+	error = request_irq(IRQ_CGU_EVT, dpm0_isr, IRQF_NO_SUSPEND |
+				IRQF_FORCE_RESUME, "cgu0 event", NULL);
+	if(error < 0)
+		printk(KERN_DEBUG "Unable to get irq\n");
+
+	error = request_irq(IRQ_DPM, dpm0_isr, IRQF_NO_SUSPEND |
+				IRQF_FORCE_RESUME, "dpm0 event", NULL);
+	if (error < 0)
+		printk(KERN_DEBUG "Unable to get irq\n");
+
+	bfin_cpu_pm = &bf609_cpu_pm;
+	return 0;
+}
+
+late_initcall(bf609_init_pm);