ARM: tegra: irq: Add support for suspend wake sources
Signed-off-by: Colin Cross <ccross@android.com>
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 5f065f9..7fb7349 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -18,6 +18,7 @@
*/
#include <linux/kernel.h>
+#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
@@ -26,74 +27,104 @@
#include <asm/hardware/gic.h>
#include <mach/iomap.h>
+#include <mach/legacy_irq.h>
#include <mach/suspend.h>
#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 PMC_CTRL 0x0
+#define PMC_CTRL_LATCH_WAKEUPS (1 << 5)
+#define PMC_WAKE_MASK 0xc
+#define PMC_WAKE_LEVEL 0x10
+#define PMC_WAKE_STATUS 0x14
+#define PMC_SW_WAKE_STATUS 0x18
+#define PMC_DPD_SAMPLE 0x20
-#define APBDMA_IRQ_STA_CPU 0x14
-#define APBDMA_IRQ_MASK_SET 0x20
-#define APBDMA_IRQ_MASK_CLR 0x24
+static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
-#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 u32 tegra_lp0_wake_enb;
+static u32 tegra_lp0_wake_level;
+static u32 tegra_lp0_wake_level_any;
static void (*tegra_gic_mask_irq)(struct irq_data *d);
static void (*tegra_gic_unmask_irq)(struct irq_data *d);
-#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)
+/* ensures that sufficient time is passed for a register write to
+ * serialize into the 32KHz domain */
+static void pmc_32kwritel(u32 val, unsigned long offs)
+{
+ writel(val, pmc + offs);
+ udelay(130);
+}
+
+int tegra_set_lp1_wake(int irq, int enable)
+{
+ return tegra_legacy_irq_set_wake(irq, enable);
+}
+
+void tegra_set_lp0_wake_pads(u32 wake_enb, u32 wake_level, u32 wake_any)
+{
+ u32 temp;
+ u32 status;
+ u32 lvl;
+
+ wake_level &= wake_enb;
+ wake_any &= wake_enb;
+
+ wake_level |= (tegra_lp0_wake_level & tegra_lp0_wake_enb);
+ wake_any |= (tegra_lp0_wake_level_any & tegra_lp0_wake_enb);
+
+ wake_enb |= tegra_lp0_wake_enb;
+
+ pmc_32kwritel(0, PMC_SW_WAKE_STATUS);
+ temp = readl(pmc + PMC_CTRL);
+ temp |= PMC_CTRL_LATCH_WAKEUPS;
+ pmc_32kwritel(temp, PMC_CTRL);
+ temp &= ~PMC_CTRL_LATCH_WAKEUPS;
+ pmc_32kwritel(temp, PMC_CTRL);
+ status = readl(pmc + PMC_SW_WAKE_STATUS);
+ lvl = readl(pmc + PMC_WAKE_LEVEL);
+
+ /* flip the wakeup trigger for any-edge triggered pads
+ * which are currently asserting as wakeups */
+ lvl ^= status;
+ lvl &= wake_any;
+
+ wake_level |= lvl;
+
+ writel(wake_level, pmc + PMC_WAKE_LEVEL);
+ /* Enable DPD sample to trigger sampling pads data and direction
+ * in which pad will be driven during lp0 mode*/
+ writel(0x1, pmc + PMC_DPD_SAMPLE);
+
+ writel(wake_enb, pmc + PMC_WAKE_MASK);
+}
static void tegra_mask(struct irq_data *d)
{
- void __iomem *addr = ictlr_to_virt(irq_to_ictlr(d->irq));
tegra_gic_mask_irq(d);
- writel(1 << (d->irq & 31), addr+ICTLR_CPU_IER_CLR);
+ tegra_legacy_mask_irq(d->irq);
}
static void tegra_unmask(struct irq_data *d)
{
- void __iomem *addr = ictlr_to_virt(irq_to_ictlr(d->irq));
tegra_gic_unmask_irq(d);
- writel(1<<(d->irq&31), addr+ICTLR_CPU_IER_SET);
+ tegra_legacy_unmask_irq(d->irq);
}
-#ifdef CONFIG_PM
-
-static int tegra_set_wake(struct irq_data *d, unsigned int on)
-{
- return 0;
-}
-#endif
-
static struct irq_chip tegra_irq = {
- .name = "PPI",
- .irq_mask = tegra_mask,
- .irq_unmask = tegra_unmask,
-#ifdef CONFIG_PM
- .irq_set_wake = tegra_set_wake,
-#endif
+ .name = "PPI",
+ .irq_mask = tegra_mask,
+ .irq_unmask = tegra_unmask,
};
void __init tegra_init_irq(void)
{
struct irq_chip *gic;
unsigned int i;
+ int irq;
- 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);
- }
+ tegra_init_legacy_irq();
gic_init(0, 29, IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE),
IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x100));
@@ -106,67 +137,10 @@
tegra_irq.irq_set_affinity = gic->irq_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);
+ for (i = 0; i < INT_MAIN_NR; i++) {
+ irq = INT_PRI_BASE + i;
+ set_irq_chip(irq, &tegra_irq);
+ set_irq_handler(irq, handle_level_irq);
+ set_irq_flags(irq, 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