/*
* Copyright (C) 2007 Lennert Buytenhek <buytenh@wantstofly.org>
- * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
.endm
.macro get_irqnr_preamble, base, tmp
+#ifndef CONFIG_MXC_TZIC
ldr \base, =avic_base
ldr \base, [\base]
#ifdef CONFIG_MXC_IRQ_PRIOR
ldr r4, [\base, #AVIC_NIMASK]
#endif
+#elif defined CONFIG_MXC_TZIC
+ ldr \base, =tzic_base
+ ldr \base, [\base]
+#endif /* CONFIG_MXC_TZIC */
.endm
.macro arch_ret_to_user, tmp1, tmp2
@ and returns its number in irqnr
@ and returns if an interrupt occured in irqstat
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+#ifndef CONFIG_MXC_TZIC
@ Load offset & priority of the highest priority
@ interrupt pending from AVIC_NIVECSR
ldr \irqstat, [\base, #0x40]
bicne \tmp, \irqstat, #0xFFFFFFE0
strne \tmp, [\base, #AVIC_NIMASK]
streq r4, [\base, #AVIC_NIMASK]
+#endif
+#elif defined CONFIG_MXC_TZIC
+ @ Load offset & priority of the highest priority
+ @ interrupt pending.
+ @ 0xD80 is HIPND0 register
+ mov \irqnr, #0
+ mov \irqstat, #0x0D80
+1000:
+ ldr \tmp, [\irqstat, \base]
+ cmp \tmp, #0
+ bne 1001f
+ addeq \irqnr, \irqnr, #32
+ addeq \irqstat, \irqstat, #4
+ cmp \irqnr, #128
+ blo 1000b
+ b 2001f
+1001: mov \irqstat, #1
+1002: tst \tmp, \irqstat
+ bne 2002f
+ movs \tmp, \tmp, lsr #1
+ addne \irqnr, \irqnr, #1
+ bne 1002b
+2001:
+ mov \irqnr, #0
+2002:
+ movs \irqnr, \irqnr
#endif
.endm
--- /dev/null
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+
+#include <asm/mach/irq.h>
+
+#include <mach/hardware.h>
+
+/*
+ *****************************************
+ * TZIC Registers *
+ *****************************************
+ */
+
+#define TZIC_INTCNTL 0x0000 /* Control register */
+#define TZIC_INTTYPE 0x0004 /* Controller Type register */
+#define TZIC_IMPID 0x0008 /* Distributor Implementer Identification */
+#define TZIC_PRIOMASK 0x000C /* Priority Mask Reg */
+#define TZIC_SYNCCTRL 0x0010 /* Synchronizer Control register */
+#define TZIC_DSMINT 0x0014 /* DSM interrupt Holdoffregister */
+#define TZIC_INTSEC0(i) (0x0080 + ((i) << 2)) /* Interrupt Security Reg 0 */
+#define TZIC_ENSET0(i) (0x0100 + ((i) << 2)) /* Enable Set Reg 0 */
+#define TZIC_ENCLEAR0(i) (0x0180 + ((i) << 2)) /* Enable Clear Reg 0 */
+#define TZIC_SRCSET0 0x0200 /* Source Set Register 0 */
+#define TZIC_SRCCLAR0 0x0280 /* Source Clear Register 0 */
+#define TZIC_PRIORITY0 0x0400 /* Priority Register 0 */
+#define TZIC_PND0 0x0D00 /* Pending Register 0 */
+#define TZIC_HIPND0 0x0D80 /* High Priority Pending Register */
+#define TZIC_WAKEUP0(i) (0x0E00 + ((i) << 2)) /* Wakeup Config Register */
+#define TZIC_SWINT 0x0F00 /* Software Interrupt Rigger Register */
+#define TZIC_ID0 0x0FD0 /* Indentification Register 0 */
+
+void __iomem *tzic_base; /* Used as irq controller base in entry-macro.S */
+
+/**
+ * tzic_mask_irq() - Disable interrupt number "irq" in the TZIC
+ *
+ * @param irq interrupt source number
+ */
+static void tzic_mask_irq(unsigned int irq)
+{
+ int index, off;
+
+ index = irq >> 5;
+ off = irq & 0x1F;
+ __raw_writel(1 << off, tzic_base + TZIC_ENCLEAR0(index));
+}
+
+/**
+ * tzic_unmask_irq() - Enable interrupt number "irq" in the TZIC
+ *
+ * @param irq interrupt source number
+ */
+static void tzic_unmask_irq(unsigned int irq)
+{
+ int index, off;
+
+ index = irq >> 5;
+ off = irq & 0x1F;
+ __raw_writel(1 << off, tzic_base + TZIC_ENSET0(index));
+}
+
+static unsigned int wakeup_intr[4];
+
+/**
+ * tzic_set_wake_irq() - Set interrupt number "irq" in the TZIC as a wake-up source.
+ *
+ * @param irq interrupt source number
+ * @param enable enable as wake-up if equal to non-zero
+ * disble as wake-up if equal to zero
+ *
+ * @return This function returns 0 on success.
+ */
+static int tzic_set_wake_irq(unsigned int irq, unsigned int enable)
+{
+ unsigned int index, off;
+
+ index = irq >> 5;
+ off = irq & 0x1F;
+
+ if (index > 3)
+ return -EINVAL;
+
+ if (enable)
+ wakeup_intr[index] |= (1 << off);
+ else
+ wakeup_intr[index] &= ~(1 << off);
+
+ return 0;
+}
+
+static struct irq_chip mxc_tzic_chip = {
+ .name = "MXC_TZIC",
+ .ack = tzic_mask_irq,
+ .mask = tzic_mask_irq,
+ .unmask = tzic_unmask_irq,
+ .set_wake = tzic_set_wake_irq,
+};
+
+/*
+ * This function initializes the TZIC hardware and disables all the
+ * interrupts. It registers the interrupt enable and disable functions
+ * to the kernel for each interrupt source.
+ */
+void __init tzic_init_irq(void __iomem *irqbase)
+{
+ int i;
+
+ tzic_base = irqbase;
+ /* put the TZIC into the reset value with
+ * all interrupts disabled
+ */
+ i = __raw_readl(tzic_base + TZIC_INTCNTL);
+
+ __raw_writel(0x80010001, tzic_base + TZIC_INTCNTL);
+ __raw_writel(0x1f, tzic_base + TZIC_PRIOMASK);
+ __raw_writel(0x02, tzic_base + TZIC_SYNCCTRL);
+
+ for (i = 0; i < 4; i++)
+ __raw_writel(0xFFFFFFFF, tzic_base + TZIC_INTSEC0(i));
+
+ /* disable all interrupts */
+ for (i = 0; i < 4; i++)
+ __raw_writel(0xFFFFFFFF, tzic_base + TZIC_ENCLEAR0(i));
+
+ /* all IRQ no FIQ Warning :: No selection */
+
+ for (i = 0; i < MXC_INTERNAL_IRQS; i++) {
+ set_irq_chip(i, &mxc_tzic_chip);
+ set_irq_handler(i, handle_level_irq);
+ set_irq_flags(i, IRQF_VALID);
+ }
+
+ pr_info("TrustZone Interrupt Controller (TZIC) initialized\n");
+}
+
+/**
+ * tzic_enable_wake() - enable wakeup interrupt
+ *
+ * @param is_idle 1 if called in idle loop (ENSET0 register);
+ * 0 to be used when called from low power entry
+ * @return 0 if successful; non-zero otherwise
+ */
+int tzic_enable_wake(int is_idle)
+{
+ unsigned int i, v;
+
+ __raw_writel(1, tzic_base + TZIC_DSMINT);
+ if (unlikely(__raw_readl(tzic_base + TZIC_DSMINT) == 0))
+ return -EAGAIN;
+
+ for (i = 0; i < 4; i++) {
+ v = is_idle ? __raw_readl(TZIC_ENSET0(i)) : wakeup_intr[i];
+ __raw_writel(v, TZIC_WAKEUP0(i));
+ }
+
+ return 0;
+}
git.openpandora.org / pandora-kernel.git / commitdiff