diff options
Diffstat (limited to 'drivers/input/misc/sirfsoc-onkey.c')
| -rw-r--r-- | drivers/input/misc/sirfsoc-onkey.c | 116 |
1 files changed, 85 insertions, 31 deletions
diff --git a/drivers/input/misc/sirfsoc-onkey.c b/drivers/input/misc/sirfsoc-onkey.c index 0621c367049..fed5102e180 100644 --- a/drivers/input/misc/sirfsoc-onkey.c +++ b/drivers/input/misc/sirfsoc-onkey.c @@ -1,29 +1,54 @@ /* * 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. */ #include <linux/module.h> -#include <linux/init.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/platform_device.h> #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) { @@ -35,21 +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" }, {}, @@ -71,7 +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); @@ -87,11 +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", @@ -99,11 +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, @@ -112,7 +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; @@ -126,25 +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, @@ -153,13 +207,13 @@ static struct platform_driver sirfsoc_pwrc_driver = { .name = "sirfsoc-pwrc", .owner = THIS_MODULE, .pm = &sirfsoc_pwrc_pm_ops, - .of_match_table = of_match_ptr(sirfsoc_pwrc_of_match), + .of_match_table = sirfsoc_pwrc_of_match, } }; module_platform_driver(sirfsoc_pwrc_driver); -MODULE_LICENSE("GPLv2"); +MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Binghua Duan <Binghua.Duan@csr.com>, Xianglong Du <Xianglong.Du@csr.com>"); MODULE_DESCRIPTION("CSR Prima2 PWRC Driver"); MODULE_ALIAS("platform:sirfsoc-pwrc"); |