1 files changed, 137 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 1fdbe708d43d..50a8dfb9a0cf 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