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Date: Sun, 5 Dec 2010 15:09:00 -0800
From: Colin Cross <ccross@...roid.com>
To: linux-tegra@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
Colin Cross <ccross@...roid.com>,
Erik Gilling <konkers@...roid.com>,
Olof Johansson <olof@...om.net>,
Russell King <linux@....linux.org.uk>,
linux-kernel@...r.kernel.org
Subject: [PATCH 13/21] ARM: tegra: irq: Add set_wake and set_type support for suspend
Signed-off-by: Colin Cross <ccross@...roid.com>
---
arch/arm/mach-tegra/include/mach/legacy_irq.h | 3 +-
arch/arm/mach-tegra/irq.c | 106 +++++++++++++++++++++++++
arch/arm/mach-tegra/legacy_irq.c | 4 +-
3 files changed, 110 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-tegra/include/mach/legacy_irq.h b/arch/arm/mach-tegra/include/mach/legacy_irq.h
index d898c0e..3a2bfab 100644
--- a/arch/arm/mach-tegra/include/mach/legacy_irq.h
+++ b/arch/arm/mach-tegra/include/mach/legacy_irq.h
@@ -31,5 +31,6 @@ int tegra_legacy_irq_set_wake(int irq, int enable);
void tegra_legacy_irq_set_lp1_wake_mask(void);
void tegra_legacy_irq_restore_mask(void);
void tegra_init_legacy_irq(void);
-
+void tegra_legacy_irq_suspend(void);
+void tegra_legacy_irq_resume(void);
#endif
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 8f47a9c..ced7007 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -54,6 +54,51 @@ static void pmc_32kwritel(u32 val, unsigned long offs)
udelay(130);
}
+int tegra_set_lp0_wake(int irq, int enable)
+{
+ int wake = tegra_irq_to_wake(irq);
+
+ if (wake < 0)
+ return -EINVAL;
+
+ if (enable)
+ tegra_lp0_wake_enb |= 1 << wake;
+ else
+ tegra_lp0_wake_enb &= ~(1 << wake);
+
+ return 0;
+}
+
+int tegra_set_lp0_wake_type(int irq, int flow_type)
+{
+ int wake = tegra_irq_to_wake(irq);
+
+ if (wake < 0)
+ return 0;
+
+ switch (flow_type) {
+ case IRQF_TRIGGER_FALLING:
+ case IRQF_TRIGGER_LOW:
+ tegra_lp0_wake_level &= ~(1 << wake);
+ tegra_lp0_wake_level_any &= ~(1 << wake);
+ break;
+ case IRQF_TRIGGER_HIGH:
+ case IRQF_TRIGGER_RISING:
+ tegra_lp0_wake_level |= 1 << wake;
+ tegra_lp0_wake_level_any &= ~(1 << wake);
+ break;
+
+ case IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING:
+ tegra_lp0_wake_level_any |= 1 << wake;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+
int tegra_set_lp1_wake(int irq, int enable)
{
return tegra_legacy_irq_set_wake(irq, enable);
@@ -97,6 +142,33 @@ void tegra_set_lp0_wake_pads(u32 wake_enb, u32 wake_level, u32 wake_any)
writel(wake_enb, pmc + PMC_WAKE_MASK);
}
+static void tegra_irq_handle_wake(void)
+{
+ int wake;
+ int irq;
+ struct irq_desc *desc;
+
+ unsigned long wake_status = readl(pmc + PMC_WAKE_STATUS);
+ for_each_set_bit(wake, &wake_status, sizeof(wake_status) * 8) {
+ irq = tegra_wake_to_irq(wake);
+ if (!irq) {
+ pr_info("Resume caused by WAKE%d\n", wake);
+ continue;
+ }
+
+ desc = irq_to_desc(irq);
+ if (!desc || !desc->action || !desc->action->name) {
+ pr_info("Resume caused by WAKE%d, irq %d\n", wake, irq);
+ continue;
+ }
+
+ pr_info("Resume caused by WAKE%d, %s\n", wake,
+ desc->action->name);
+
+ generic_handle_irq(irq);
+ }
+}
+
static void tegra_mask(unsigned int irq)
{
gic_mask_irq(irq);
@@ -109,11 +181,34 @@ static void tegra_unmask(unsigned int irq)
tegra_legacy_unmask_irq(irq);
}
+static int tegra_set_wake(unsigned int irq, unsigned int enable)
+{
+ int ret;
+ ret = tegra_set_lp1_wake(irq, enable);
+ if (ret)
+ return ret;
+
+ if (tegra_get_suspend_mode() == TEGRA_SUSPEND_LP0)
+ return tegra_set_lp0_wake(irq, enable);
+
+ return 0;
+}
+
+static int tegra_set_type(unsigned int irq, unsigned int flow_type)
+{
+ if (tegra_get_suspend_mode() == TEGRA_SUSPEND_LP0)
+ return tegra_set_lp0_wake_type(irq, flow_type);
+
+ return 0;
+}
+
static struct irq_chip tegra_irq = {
.name = "PPI",
.ack = gic_ack_irq,
.mask = tegra_mask,
.unmask = tegra_unmask,
+ .set_wake = tegra_set_wake,
+ .set_type = tegra_set_type,
#ifdef CONFIG_SMP
.set_affinity = gic_set_cpu,
#endif
@@ -136,3 +231,14 @@ void __init tegra_init_irq(void)
set_irq_flags(irq, IRQF_VALID);
}
}
+
+void tegra_irq_suspend(void)
+{
+ tegra_legacy_irq_suspend();
+}
+
+void tegra_irq_resume(void)
+{
+ tegra_legacy_irq_resume();
+ tegra_irq_handle_wake();
+}
diff --git a/arch/arm/mach-tegra/legacy_irq.c b/arch/arm/mach-tegra/legacy_irq.c
index 38eb719..5a6197b 100644
--- a/arch/arm/mach-tegra/legacy_irq.c
+++ b/arch/arm/mach-tegra/legacy_irq.c
@@ -179,7 +179,7 @@ static u32 cop_ier[NUM_ICTLRS];
static u32 cpu_ier[NUM_ICTLRS];
static u32 cpu_iep[NUM_ICTLRS];
-void tegra_irq_suspend(void)
+void tegra_legacy_irq_suspend(void)
{
unsigned long flags;
int i;
@@ -195,7 +195,7 @@ void tegra_irq_suspend(void)
local_irq_restore(flags);
}
-void tegra_irq_resume(void)
+void tegra_legacy_irq_resume(void)
{
unsigned long flags;
int i;
--
1.7.3.1
--
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