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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-30 08:17:44 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-30 08:17:44 +0200 |
commit | 2f7fa1be66dce77608330c5eb918d6360b5525f2 (patch) | |
tree | 05dbfe86d2b192389da11686fa380e7ae45be225 /drivers/input/keyboard | |
parent | Merge branch 'for-3.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff) | |
parent | Input: wacom - check for allocation failure in probe() (diff) | |
download | linux-2f7fa1be66dce77608330c5eb918d6360b5525f2.tar.xz linux-2f7fa1be66dce77608330c5eb918d6360b5525f2.zip |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull 2nd round of input updates from Dmitry Torokhov:
- update to Wacom driver to support wireless devices
- update to Sentelci touchpad driver to support newer hardware
- update to gpio-keys driver to support "interrupt-only" keys
- fixups to earlier commits
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: wacom - check for allocation failure in probe()
Input: tegra-kbc - allocate pdata before using it
Input: amijoy - add missing platform check
Input: wacom - wireless battery status
Input: wacom - create inputs when wireless connect
Input: wacom - wireless monitor framework
Input: wacom - isolate input registration
Input: sentelic - improve packet debugging information
Input: sentelic - minor code cleanup
Input: sentelic - enabling absolute coordinates output for newer hardware
Input: sentelic - refactor code for upcoming new hardware support
Input: gpio_keys - add support for interrupt only keys
Input: gpio_keys - consolidate key destructor code
Input: revert "gpio_keys - switch to using threaded IRQs"
Input: gpio_keys - constify platform data
Input: spear-keyboard - remove kbd_set_plat_data()
Diffstat (limited to 'drivers/input/keyboard')
-rw-r--r-- | drivers/input/keyboard/gpio_keys.c | 259 | ||||
-rw-r--r-- | drivers/input/keyboard/tegra-kbc.c | 1 |
2 files changed, 170 insertions, 90 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index ed1ed469d085..62bfce468f9f 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -28,14 +28,18 @@ #include <linux/gpio.h> #include <linux/of_platform.h> #include <linux/of_gpio.h> +#include <linux/spinlock.h> struct gpio_button_data { - struct gpio_keys_button *button; + const struct gpio_keys_button *button; struct input_dev *input; struct timer_list timer; struct work_struct work; - int timer_debounce; /* in msecs */ + unsigned int timer_debounce; /* in msecs */ + unsigned int irq; + spinlock_t lock; bool disabled; + bool key_pressed; }; struct gpio_keys_drvdata { @@ -114,7 +118,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata) /* * Disable IRQ and possible debouncing timer. */ - disable_irq(gpio_to_irq(bdata->button->gpio)); + disable_irq(bdata->irq); if (bdata->timer_debounce) del_timer_sync(&bdata->timer); @@ -135,7 +139,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata) static void gpio_keys_enable_button(struct gpio_button_data *bdata) { if (bdata->disabled) { - enable_irq(gpio_to_irq(bdata->button->gpio)); + enable_irq(bdata->irq); bdata->disabled = false; } } @@ -195,7 +199,7 @@ static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata, * @type: button type (%EV_KEY, %EV_SW) * * This function parses stringified bitmap from @buf and disables/enables - * GPIO buttons accordinly. Returns 0 on success and negative error + * GPIO buttons accordingly. Returns 0 on success and negative error * on failure. */ static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata, @@ -320,9 +324,9 @@ static struct attribute_group gpio_keys_attr_group = { .attrs = gpio_keys_attrs, }; -static void gpio_keys_report_event(struct gpio_button_data *bdata) +static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata) { - struct gpio_keys_button *button = bdata->button; + const struct gpio_keys_button *button = bdata->button; struct input_dev *input = bdata->input; unsigned int type = button->type ?: EV_KEY; int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0) ^ button->active_low; @@ -336,27 +340,26 @@ static void gpio_keys_report_event(struct gpio_button_data *bdata) input_sync(input); } -static void gpio_keys_work_func(struct work_struct *work) +static void gpio_keys_gpio_work_func(struct work_struct *work) { struct gpio_button_data *bdata = container_of(work, struct gpio_button_data, work); - gpio_keys_report_event(bdata); + gpio_keys_gpio_report_event(bdata); } -static void gpio_keys_timer(unsigned long _data) +static void gpio_keys_gpio_timer(unsigned long _data) { - struct gpio_button_data *data = (struct gpio_button_data *)_data; + struct gpio_button_data *bdata = (struct gpio_button_data *)_data; - schedule_work(&data->work); + schedule_work(&bdata->work); } -static irqreturn_t gpio_keys_isr(int irq, void *dev_id) +static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id) { struct gpio_button_data *bdata = dev_id; - struct gpio_keys_button *button = bdata->button; - BUG_ON(irq != gpio_to_irq(button->gpio)); + BUG_ON(irq != bdata->irq); if (bdata->timer_debounce) mod_timer(&bdata->timer, @@ -367,50 +370,133 @@ static irqreturn_t gpio_keys_isr(int irq, void *dev_id) return IRQ_HANDLED; } +static void gpio_keys_irq_timer(unsigned long _data) +{ + struct gpio_button_data *bdata = (struct gpio_button_data *)_data; + struct input_dev *input = bdata->input; + unsigned long flags; + + spin_lock_irqsave(&bdata->lock, flags); + if (bdata->key_pressed) { + input_event(input, EV_KEY, bdata->button->code, 0); + input_sync(input); + bdata->key_pressed = false; + } + spin_unlock_irqrestore(&bdata->lock, flags); +} + +static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id) +{ + struct gpio_button_data *bdata = dev_id; + const struct gpio_keys_button *button = bdata->button; + struct input_dev *input = bdata->input; + unsigned long flags; + + BUG_ON(irq != bdata->irq); + + spin_lock_irqsave(&bdata->lock, flags); + + if (!bdata->key_pressed) { + input_event(input, EV_KEY, button->code, 1); + input_sync(input); + + if (!bdata->timer_debounce) { + input_event(input, EV_KEY, button->code, 0); + input_sync(input); + goto out; + } + + bdata->key_pressed = true; + } + + if (bdata->timer_debounce) + mod_timer(&bdata->timer, + jiffies + msecs_to_jiffies(bdata->timer_debounce)); +out: + spin_unlock_irqrestore(&bdata->lock, flags); + return IRQ_HANDLED; +} + static int __devinit gpio_keys_setup_key(struct platform_device *pdev, + struct input_dev *input, struct gpio_button_data *bdata, - struct gpio_keys_button *button) + const struct gpio_keys_button *button) { const char *desc = button->desc ? button->desc : "gpio_keys"; struct device *dev = &pdev->dev; + irq_handler_t isr; unsigned long irqflags; int irq, error; - setup_timer(&bdata->timer, gpio_keys_timer, (unsigned long)bdata); - INIT_WORK(&bdata->work, gpio_keys_work_func); + bdata->input = input; + bdata->button = button; + spin_lock_init(&bdata->lock); - error = gpio_request(button->gpio, desc); - if (error < 0) { - dev_err(dev, "failed to request GPIO %d, error %d\n", - button->gpio, error); - goto fail2; - } + if (gpio_is_valid(button->gpio)) { - error = gpio_direction_input(button->gpio); - if (error < 0) { - dev_err(dev, "failed to configure" - " direction for GPIO %d, error %d\n", - button->gpio, error); - goto fail3; - } + error = gpio_request(button->gpio, desc); + if (error < 0) { + dev_err(dev, "Failed to request GPIO %d, error %d\n", + button->gpio, error); + return error; + } - if (button->debounce_interval) { - error = gpio_set_debounce(button->gpio, - button->debounce_interval * 1000); - /* use timer if gpiolib doesn't provide debounce */ - if (error < 0) - bdata->timer_debounce = button->debounce_interval; - } + error = gpio_direction_input(button->gpio); + if (error < 0) { + dev_err(dev, + "Failed to configure direction for GPIO %d, error %d\n", + button->gpio, error); + goto fail; + } - irq = gpio_to_irq(button->gpio); - if (irq < 0) { - error = irq; - dev_err(dev, "Unable to get irq number for GPIO %d, error %d\n", - button->gpio, error); - goto fail3; + if (button->debounce_interval) { + error = gpio_set_debounce(button->gpio, + button->debounce_interval * 1000); + /* use timer if gpiolib doesn't provide debounce */ + if (error < 0) + bdata->timer_debounce = + button->debounce_interval; + } + + irq = gpio_to_irq(button->gpio); + if (irq < 0) { + error = irq; + dev_err(dev, + "Unable to get irq number for GPIO %d, error %d\n", + button->gpio, error); + goto fail; + } + bdata->irq = irq; + + INIT_WORK(&bdata->work, gpio_keys_gpio_work_func); + setup_timer(&bdata->timer, + gpio_keys_gpio_timer, (unsigned long)bdata); + + isr = gpio_keys_gpio_isr; + irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; + + } else { + if (!button->irq) { + dev_err(dev, "No IRQ specified\n"); + return -EINVAL; + } + bdata->irq = button->irq; + + if (button->type && button->type != EV_KEY) { + dev_err(dev, "Only EV_KEY allowed for IRQ buttons.\n"); + return -EINVAL; + } + + bdata->timer_debounce = button->debounce_interval; + setup_timer(&bdata->timer, + gpio_keys_irq_timer, (unsigned long)bdata); + + isr = gpio_keys_irq_isr; + irqflags = 0; } - irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; + input_set_capability(input, button->type ?: EV_KEY, button->code); + /* * If platform has specified that the button can be disabled, * we don't want it to share the interrupt line. @@ -418,18 +504,19 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev, if (!button->can_disable) irqflags |= IRQF_SHARED; - error = request_threaded_irq(irq, NULL, gpio_keys_isr, irqflags, desc, bdata); + error = request_any_context_irq(bdata->irq, isr, irqflags, desc, bdata); if (error < 0) { dev_err(dev, "Unable to claim irq %d; error %d\n", - irq, error); - goto fail3; + bdata->irq, error); + goto fail; } return 0; -fail3: - gpio_free(button->gpio); -fail2: +fail: + if (gpio_is_valid(button->gpio)) + gpio_free(button->gpio); + return error; } @@ -547,9 +634,19 @@ static int gpio_keys_get_devtree_pdata(struct device *dev, #endif +static void gpio_remove_key(struct gpio_button_data *bdata) +{ + free_irq(bdata->irq, bdata); + if (bdata->timer_debounce) + del_timer_sync(&bdata->timer); + cancel_work_sync(&bdata->work); + if (gpio_is_valid(bdata->button->gpio)) + gpio_free(bdata->button->gpio); +} + static int __devinit gpio_keys_probe(struct platform_device *pdev) { - struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; + const struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; struct gpio_keys_drvdata *ddata; struct device *dev = &pdev->dev; struct gpio_keys_platform_data alt_pdata; @@ -599,21 +696,15 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) __set_bit(EV_REP, input->evbit); for (i = 0; i < pdata->nbuttons; i++) { - struct gpio_keys_button *button = &pdata->buttons[i]; + const struct gpio_keys_button *button = &pdata->buttons[i]; struct gpio_button_data *bdata = &ddata->data[i]; - unsigned int type = button->type ?: EV_KEY; - - bdata->input = input; - bdata->button = button; - error = gpio_keys_setup_key(pdev, bdata, button); + error = gpio_keys_setup_key(pdev, input, bdata, button); if (error) goto fail2; if (button->wakeup) wakeup = 1; - - input_set_capability(input, type, button->code); } error = sysfs_create_group(&pdev->dev.kobj, &gpio_keys_attr_group); @@ -630,9 +721,12 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) goto fail3; } - /* get current state of buttons */ - for (i = 0; i < pdata->nbuttons; i++) - gpio_keys_report_event(&ddata->data[i]); + /* get current state of buttons that are connected to GPIOs */ + for (i = 0; i < pdata->nbuttons; i++) { + struct gpio_button_data *bdata = &ddata->data[i]; + if (gpio_is_valid(bdata->button->gpio)) + gpio_keys_gpio_report_event(bdata); + } input_sync(input); device_init_wakeup(&pdev->dev, wakeup); @@ -642,13 +736,8 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) fail3: sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group); fail2: - while (--i >= 0) { - free_irq(gpio_to_irq(pdata->buttons[i].gpio), &ddata->data[i]); - if (ddata->data[i].timer_debounce) - del_timer_sync(&ddata->data[i].timer); - cancel_work_sync(&ddata->data[i].work); - gpio_free(pdata->buttons[i].gpio); - } + while (--i >= 0) + gpio_remove_key(&ddata->data[i]); platform_set_drvdata(pdev, NULL); fail1: @@ -671,14 +760,8 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 0); - for (i = 0; i < ddata->n_buttons; i++) { - int irq = gpio_to_irq(ddata->data[i].button->gpio); - free_irq(irq, &ddata->data[i]); - if (ddata->data[i].timer_debounce) - del_timer_sync(&ddata->data[i].timer); - cancel_work_sync(&ddata->data[i].work); - gpio_free(ddata->data[i].button->gpio); - } + for (i = 0; i < ddata->n_buttons; i++) + gpio_remove_key(&ddata->data[i]); input_unregister_device(input); @@ -703,11 +786,9 @@ static int gpio_keys_suspend(struct device *dev) if (device_may_wakeup(dev)) { for (i = 0; i < ddata->n_buttons; i++) { - struct gpio_keys_button *button = ddata->data[i].button; - if (button->wakeup) { - int irq = gpio_to_irq(button->gpio); - enable_irq_wake(irq); - } + struct gpio_button_data *bdata = &ddata->data[i]; + if (bdata->button->wakeup) + enable_irq_wake(bdata->irq); } } @@ -720,14 +801,12 @@ static int gpio_keys_resume(struct device *dev) int i; for (i = 0; i < ddata->n_buttons; i++) { + struct gpio_button_data *bdata = &ddata->data[i]; + if (bdata->button->wakeup && device_may_wakeup(dev)) + disable_irq_wake(bdata->irq); - struct gpio_keys_button *button = ddata->data[i].button; - if (button->wakeup && device_may_wakeup(dev)) { - int irq = gpio_to_irq(button->gpio); - disable_irq_wake(irq); - } - - gpio_keys_report_event(&ddata->data[i]); + if (gpio_is_valid(bdata->button->gpio)) + gpio_keys_gpio_report_event(bdata); } input_sync(ddata->input); diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c index 21c42f852343..fe4ac95ca6c8 100644 --- a/drivers/input/keyboard/tegra-kbc.c +++ b/drivers/input/keyboard/tegra-kbc.c @@ -630,6 +630,7 @@ tegra_kbc_dt_parse_pdata(struct platform_device *pdev) if (!np) return NULL; + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); if (!pdata) return NULL; |