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path: root/drivers/input/misc/sirfsoc-onkey.c
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Diffstat (limited to 'drivers/input/misc/sirfsoc-onkey.c')
-rw-r--r--drivers/input/misc/sirfsoc-onkey.c111
1 files changed, 83 insertions, 28 deletions
diff --git a/drivers/input/misc/sirfsoc-onkey.c b/drivers/input/misc/sirfsoc-onkey.c
index e8897c36d21..e4104f9b2e6 100644
--- a/drivers/input/misc/sirfsoc-onkey.c
+++ b/drivers/input/misc/sirfsoc-onkey.c
@@ -1,7 +1,8 @@
/*
* Power key driver for SiRF PrimaII
*
- * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company.
+ * Copyright (c) 2013 - 2014 Cambridge Silicon Radio Limited, a CSR plc group
+ * company.
*
* Licensed under GPLv2 or later.
*/
@@ -13,16 +14,41 @@
#include <linux/input.h>
#include <linux/rtc/sirfsoc_rtciobrg.h>
#include <linux/of.h>
+#include <linux/workqueue.h>
struct sirfsoc_pwrc_drvdata {
u32 pwrc_base;
struct input_dev *input;
+ struct delayed_work work;
};
#define PWRC_ON_KEY_BIT (1 << 0)
#define PWRC_INT_STATUS 0xc
#define PWRC_INT_MASK 0x10
+#define PWRC_PIN_STATUS 0x14
+#define PWRC_KEY_DETECT_UP_TIME 20 /* ms*/
+
+static int sirfsoc_pwrc_is_on_key_down(struct sirfsoc_pwrc_drvdata *pwrcdrv)
+{
+ u32 state = sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base +
+ PWRC_PIN_STATUS);
+ return !(state & PWRC_ON_KEY_BIT); /* ON_KEY is active low */
+}
+
+static void sirfsoc_pwrc_report_event(struct work_struct *work)
+{
+ struct sirfsoc_pwrc_drvdata *pwrcdrv =
+ container_of(work, struct sirfsoc_pwrc_drvdata, work.work);
+
+ if (sirfsoc_pwrc_is_on_key_down(pwrcdrv)) {
+ schedule_delayed_work(&pwrcdrv->work,
+ msecs_to_jiffies(PWRC_KEY_DETECT_UP_TIME));
+ } else {
+ input_event(pwrcdrv->input, EV_KEY, KEY_POWER, 0);
+ input_sync(pwrcdrv->input);
+ }
+}
static irqreturn_t sirfsoc_pwrc_isr(int irq, void *dev_id)
{
@@ -34,21 +60,44 @@ static irqreturn_t sirfsoc_pwrc_isr(int irq, void *dev_id)
sirfsoc_rtc_iobrg_writel(int_status & ~PWRC_ON_KEY_BIT,
pwrcdrv->pwrc_base + PWRC_INT_STATUS);
- /*
- * For a typical Linux system, we report KEY_SUSPEND to trigger apm-power.c
- * to queue a SUSPEND APM event
- */
- input_event(pwrcdrv->input, EV_PWR, KEY_SUSPEND, 1);
+ input_event(pwrcdrv->input, EV_KEY, KEY_POWER, 1);
input_sync(pwrcdrv->input);
-
- /*
- * Todo: report KEY_POWER event for Android platforms, Android PowerManager
- * will handle the suspend and powerdown/hibernation
- */
+ schedule_delayed_work(&pwrcdrv->work,
+ msecs_to_jiffies(PWRC_KEY_DETECT_UP_TIME));
return IRQ_HANDLED;
}
+static void sirfsoc_pwrc_toggle_interrupts(struct sirfsoc_pwrc_drvdata *pwrcdrv,
+ bool enable)
+{
+ u32 int_mask;
+
+ int_mask = sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base + PWRC_INT_MASK);
+ if (enable)
+ int_mask |= PWRC_ON_KEY_BIT;
+ else
+ int_mask &= ~PWRC_ON_KEY_BIT;
+ sirfsoc_rtc_iobrg_writel(int_mask, pwrcdrv->pwrc_base + PWRC_INT_MASK);
+}
+
+static int sirfsoc_pwrc_open(struct input_dev *input)
+{
+ struct sirfsoc_pwrc_drvdata *pwrcdrv = input_get_drvdata(input);
+
+ sirfsoc_pwrc_toggle_interrupts(pwrcdrv, true);
+
+ return 0;
+}
+
+static void sirfsoc_pwrc_close(struct input_dev *input)
+{
+ struct sirfsoc_pwrc_drvdata *pwrcdrv = input_get_drvdata(input);
+
+ sirfsoc_pwrc_toggle_interrupts(pwrcdrv, false);
+ cancel_delayed_work_sync(&pwrcdrv->work);
+}
+
static const struct of_device_id sirfsoc_pwrc_of_match[] = {
{ .compatible = "sirf,prima2-pwrc" },
{},
@@ -70,7 +119,7 @@ static int sirfsoc_pwrc_probe(struct platform_device *pdev)
}
/*
- * we can't use of_iomap because pwrc is not mapped in memory,
+ * We can't use of_iomap because pwrc is not mapped in memory,
* the so-called base address is only offset in rtciobrg
*/
error = of_property_read_u32(np, "reg", &pwrcdrv->pwrc_base);
@@ -86,11 +135,22 @@ static int sirfsoc_pwrc_probe(struct platform_device *pdev)
pwrcdrv->input->name = "sirfsoc pwrckey";
pwrcdrv->input->phys = "pwrc/input0";
- pwrcdrv->input->evbit[0] = BIT_MASK(EV_PWR);
+ pwrcdrv->input->evbit[0] = BIT_MASK(EV_KEY);
+ input_set_capability(pwrcdrv->input, EV_KEY, KEY_POWER);
+
+ INIT_DELAYED_WORK(&pwrcdrv->work, sirfsoc_pwrc_report_event);
+
+ pwrcdrv->input->open = sirfsoc_pwrc_open;
+ pwrcdrv->input->close = sirfsoc_pwrc_close;
+
+ input_set_drvdata(pwrcdrv->input, pwrcdrv);
+
+ /* Make sure the device is quiesced */
+ sirfsoc_pwrc_toggle_interrupts(pwrcdrv, false);
irq = platform_get_irq(pdev, 0);
error = devm_request_irq(&pdev->dev, irq,
- sirfsoc_pwrc_isr, IRQF_SHARED,
+ sirfsoc_pwrc_isr, 0,
"sirfsoc_pwrc_int", pwrcdrv);
if (error) {
dev_err(&pdev->dev, "unable to claim irq %d, error: %d\n",
@@ -98,11 +158,6 @@ static int sirfsoc_pwrc_probe(struct platform_device *pdev)
return error;
}
- sirfsoc_rtc_iobrg_writel(
- sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base + PWRC_INT_MASK) |
- PWRC_ON_KEY_BIT,
- pwrcdrv->pwrc_base + PWRC_INT_MASK);
-
error = input_register_device(pwrcdrv->input);
if (error) {
dev_err(&pdev->dev,
@@ -111,7 +166,7 @@ static int sirfsoc_pwrc_probe(struct platform_device *pdev)
return error;
}
- platform_set_drvdata(pdev, pwrcdrv);
+ dev_set_drvdata(&pdev->dev, pwrcdrv);
device_init_wakeup(&pdev->dev, 1);
return 0;
@@ -125,25 +180,25 @@ static int sirfsoc_pwrc_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM_SLEEP
-static int pwrc_resume(struct device *dev)
+static int sirfsoc_pwrc_resume(struct device *dev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct sirfsoc_pwrc_drvdata *pwrcdrv = platform_get_drvdata(pdev);
+ struct sirfsoc_pwrc_drvdata *pwrcdrv = dev_get_drvdata(dev);
+ struct input_dev *input = pwrcdrv->input;
/*
* Do not mask pwrc interrupt as we want pwrc work as a wakeup source
* if users touch X_ONKEY_B, see arch/arm/mach-prima2/pm.c
*/
- sirfsoc_rtc_iobrg_writel(
- sirfsoc_rtc_iobrg_readl(
- pwrcdrv->pwrc_base + PWRC_INT_MASK) | PWRC_ON_KEY_BIT,
- pwrcdrv->pwrc_base + PWRC_INT_MASK);
+ mutex_lock(&input->mutex);
+ if (input->users)
+ sirfsoc_pwrc_toggle_interrupts(pwrcdrv, true);
+ mutex_unlock(&input->mutex);
return 0;
}
#endif
-static SIMPLE_DEV_PM_OPS(sirfsoc_pwrc_pm_ops, NULL, pwrc_resume);
+static SIMPLE_DEV_PM_OPS(sirfsoc_pwrc_pm_ops, NULL, sirfsoc_pwrc_resume);
static struct platform_driver sirfsoc_pwrc_driver = {
.probe = sirfsoc_pwrc_probe,