summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-tegra/irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-tegra/irq.c')
-rw-r--r--arch/arm/mach-tegra/irq.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 1fdbe708d43..50a8dfb9a0c 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -4,6 +4,8 @@
* Author:
* Colin Cross <ccross@google.com>
*
+ * Copyright (C) 2010, NVIDIA Corporation
+ *
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
@@ -27,8 +29,143 @@
#include "board.h"
+#define INT_SYS_NR (INT_GPIO_BASE - INT_PRI_BASE)
+#define INT_SYS_SZ (INT_SEC_BASE - INT_PRI_BASE)
+#define PPI_NR ((INT_SYS_NR+INT_SYS_SZ-1)/INT_SYS_SZ)
+
+#define APBDMA_IRQ_STA_CPU 0x14
+#define APBDMA_IRQ_MASK_SET 0x20
+#define APBDMA_IRQ_MASK_CLR 0x24
+
+#define ICTLR_CPU_IER 0x20
+#define ICTLR_CPU_IER_SET 0x24
+#define ICTLR_CPU_IER_CLR 0x28
+#define ICTLR_CPU_IEP_CLASS 0x2c
+#define ICTLR_COP_IER 0x30
+#define ICTLR_COP_IER_SET 0x34
+#define ICTLR_COP_IER_CLR 0x38
+#define ICTLR_COP_IEP_CLASS 0x3c
+
+static void (*gic_mask_irq)(unsigned int irq);
+static void (*gic_unmask_irq)(unsigned int irq);
+
+#define irq_to_ictlr(irq) (((irq)-32) >> 5)
+static void __iomem *tegra_ictlr_base = IO_ADDRESS(TEGRA_PRIMARY_ICTLR_BASE);
+#define ictlr_to_virt(ictlr) (tegra_ictlr_base + (ictlr)*0x100)
+
+static void tegra_mask(unsigned int irq)
+{
+ void __iomem *addr = ictlr_to_virt(irq_to_ictlr(irq));
+ gic_mask_irq(irq);
+ writel(1<<(irq&31), addr+ICTLR_CPU_IER_CLR);
+}
+
+static void tegra_unmask(unsigned int irq)
+{
+ void __iomem *addr = ictlr_to_virt(irq_to_ictlr(irq));
+ gic_unmask_irq(irq);
+ writel(1<<(irq&31), addr+ICTLR_CPU_IER_SET);
+}
+
+#ifdef CONFIG_PM
+
+static int tegra_set_wake(unsigned int irq, unsigned int on)
+{
+ return 0;
+}
+#endif
+
+static struct irq_chip tegra_irq = {
+ .name = "PPI",
+ .mask = tegra_mask,
+ .unmask = tegra_unmask,
+#ifdef CONFIG_PM
+ .set_wake = tegra_set_wake,
+#endif
+};
+
void __init tegra_init_irq(void)
{
+ struct irq_chip *gic;
+ unsigned int i;
+
+ for (i = 0; i < PPI_NR; i++) {
+ writel(~0, ictlr_to_virt(i) + ICTLR_CPU_IER_CLR);
+ writel(0, ictlr_to_virt(i) + ICTLR_CPU_IEP_CLASS);
+ }
+
gic_dist_init(0, IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE), 29);
gic_cpu_init(0, IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x100));
+
+ gic = get_irq_chip(29);
+ gic_unmask_irq = gic->unmask;
+ gic_mask_irq = gic->mask;
+ tegra_irq.ack = gic->ack;
+#ifdef CONFIG_SMP
+ tegra_irq.set_affinity = gic->set_affinity;
+#endif
+
+ for (i = INT_PRI_BASE; i < INT_GPIO_BASE; i++) {
+ set_irq_chip(i, &tegra_irq);
+ set_irq_handler(i, handle_level_irq);
+ set_irq_flags(i, IRQF_VALID);
+ }
+}
+
+#ifdef CONFIG_PM
+static u32 cop_ier[PPI_NR];
+static u32 cpu_ier[PPI_NR];
+static u32 cpu_iep[PPI_NR];
+
+void tegra_irq_suspend(void)
+{
+ unsigned long flags;
+ int i;
+
+ for (i = INT_PRI_BASE; i < INT_GPIO_BASE; i++) {
+ struct irq_desc *desc = irq_to_desc(i);
+ if (!desc)
+ continue;
+ if (desc->status & IRQ_WAKEUP) {
+ pr_debug("irq %d is wakeup\n", i);
+ continue;
+ }
+ disable_irq(i);
+ }
+
+ local_irq_save(flags);
+ for (i = 0; i < PPI_NR; i++) {
+ void __iomem *ictlr = ictlr_to_virt(i);
+ cpu_ier[i] = readl(ictlr + ICTLR_CPU_IER);
+ cpu_iep[i] = readl(ictlr + ICTLR_CPU_IEP_CLASS);
+ cop_ier[i] = readl(ictlr + ICTLR_COP_IER);
+ writel(~0, ictlr + ICTLR_COP_IER_CLR);
+ }
+ local_irq_restore(flags);
+}
+
+void tegra_irq_resume(void)
+{
+ unsigned long flags;
+ int i;
+
+ local_irq_save(flags);
+ for (i = 0; i < PPI_NR; i++) {
+ void __iomem *ictlr = ictlr_to_virt(i);
+ writel(cpu_iep[i], ictlr + ICTLR_CPU_IEP_CLASS);
+ writel(~0ul, ictlr + ICTLR_CPU_IER_CLR);
+ writel(cpu_ier[i], ictlr + ICTLR_CPU_IER_SET);
+ writel(0, ictlr + ICTLR_COP_IEP_CLASS);
+ writel(~0ul, ictlr + ICTLR_COP_IER_CLR);
+ writel(cop_ier[i], ictlr + ICTLR_COP_IER_SET);
+ }
+ local_irq_restore(flags);
+
+ for (i = INT_PRI_BASE; i < INT_GPIO_BASE; i++) {
+ struct irq_desc *desc = irq_to_desc(i);
+ if (!desc || (desc->status & IRQ_WAKEUP))
+ continue;
+ enable_irq(i);
+ }
}
+#endif