diff options
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.30/drivers')
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c | 167 |
1 files changed, 4 insertions, 163 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c index 0814d100ee..0fca17071f 100644 --- a/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c +++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c @@ -21,7 +21,6 @@ #include <linux/jiffies.h> #include <linux/module.h> #include <linux/slab.h> -#include <linux/workqueue.h> #include <mach/gpio.h> #include <asm/mach-types.h> @@ -35,21 +34,12 @@ extern int global_inside_suspend; struct gta02kbd { struct platform_device *pdev; struct input_dev *input; - struct device *cdev; - struct work_struct work; int aux_state; - int work_in_progress; - int hp_irq_count_in_work; - int hp_irq_count; - int jack_irq; }; -static struct class *gta02kbd_switch_class; - enum keys { GTA02_KEY_AUX, GTA02_KEY_HOLD, - GTA02_KEY_JACK, }; struct gta02kbd_key { @@ -60,7 +50,6 @@ struct gta02kbd_key { }; static irqreturn_t gta02kbd_aux_irq(int irq, void *dev_id); -static irqreturn_t gta02kbd_headphone_irq(int irq, void *dev_id); static irqreturn_t gta02kbd_default_key_irq(int irq, void *dev_id); @@ -75,10 +64,6 @@ static struct gta02kbd_key keys[] = { .isr = gta02kbd_default_key_irq, .input_key = KEY_PAUSE, }, - [GTA02_KEY_JACK] = { - .name = "GTA02 Headphone jack", - .isr = gta02kbd_headphone_irq, - }, }; /* This timer section filters AUX button IRQ bouncing */ @@ -154,106 +139,6 @@ static irqreturn_t gta02kbd_default_key_irq(int irq, void *dev_id) return IRQ_HANDLED; } - -static const char *event_array_jack[2][4] = { - [0] = { - "SWITCH_NAME=headset", - "SWITCH_STATE=0", - "EVENT=remove", - NULL - }, - [1] = { - "SWITCH_NAME=headset", - "SWITCH_STATE=1", - "EVENT=insert", - NULL - }, -}; - -static void gta02kbd_jack_event(struct device *dev, int num) -{ - kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, (char **)event_array_jack[!!num]); -} - - -static void gta02kbd_debounce_jack(struct work_struct *work) -{ - struct gta02kbd *kbd = container_of(work, struct gta02kbd, work); - unsigned long flags; - int loop = 0; - int level; - - do { - /* - * we wait out any multiple interrupt - * stuttering in 100ms lumps - */ - do { - kbd->hp_irq_count_in_work = kbd->hp_irq_count; - msleep(100); - } while (kbd->hp_irq_count != kbd->hp_irq_count_in_work); - /* - * no new interrupts on jack for 100ms... - * ok we will report it - */ - level = gpio_get_value(kbd->pdev->resource[GTA02_KEY_JACK].start); - input_report_switch(kbd->input, SW_HEADPHONE_INSERT, level); - input_sync(kbd->input); - gta02kbd_jack_event(kbd->cdev, level); - /* - * we go around the outer loop again if we detect that more - * interrupts came while we are servicing here. But we have - * to sequence it carefully with interrupts off - */ - local_save_flags(flags); - /* no interrupts during this work means we can exit the work */ - loop = !!(kbd->hp_irq_count != kbd->hp_irq_count_in_work); - if (!loop) - kbd->work_in_progress = 0; - local_irq_restore(flags); - /* - * interrupt that comes here will either queue a new work action - * since work_in_progress is cleared now, or be dealt with - * when we loop. - */ - } while (loop); -} - - -static irqreturn_t gta02kbd_headphone_irq(int irq, void *dev_id) -{ - struct gta02kbd *gta02kbd_data = dev_id; - - /* - * this interrupt is prone to bouncing and userspace doesn't like - * to have to deal with that kind of thing. So we do not accept - * that a jack interrupt is equal to a jack event. Instead we fire - * some work on the first interrupt, and it hangs about in 100ms units - * until no more interrupts come. Then it accepts the state it finds - * for jack insert and reports it once - */ - - gta02kbd_data->hp_irq_count++; - /* - * the first interrupt we see for a while, we fire the work item - * and record the interrupt count when we did that. If more interrupts - * come in the meanwhile, we can tell by the difference in that - * stored count and hp_irq_count which increments every interrupt - */ - if (!gta02kbd_data->work_in_progress) { - gta02kbd_data->jack_irq = irq; - gta02kbd_data->hp_irq_count_in_work = - gta02kbd_data->hp_irq_count; - if (!schedule_work(>a02kbd_data->work)) - printk(KERN_ERR - "Unable to schedule headphone debounce\n"); - else - gta02kbd_data->work_in_progress = 1; - } - - return IRQ_HANDLED; -} - #ifdef CONFIG_PM static int gta02kbd_suspend(struct platform_device *dev, pm_message_t state) { @@ -272,23 +157,6 @@ static int gta02kbd_resume(struct platform_device *dev) #define gta02kbd_resume NULL #endif -static ssize_t gta02kbd_switch_name_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", "gta02 Headset Jack"); -} - -static ssize_t gta02kbd_switch_state_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct gta02kbd *kbd = dev_get_drvdata(dev); - return sprintf(buf, "%d\n", - gpio_get_value(kbd->pdev->resource[GTA02_KEY_JACK].start)); -} - -static DEVICE_ATTR(name, S_IRUGO , gta02kbd_switch_name_show, NULL); -static DEVICE_ATTR(state, S_IRUGO , gta02kbd_switch_state_show, NULL); - static int gta02kbd_probe(struct platform_device *pdev) { struct gta02kbd *gta02kbd; @@ -297,6 +165,9 @@ static int gta02kbd_probe(struct platform_device *pdev) int irq; int n; + if (pdev->resource[0].flags != 0) + return -EINVAL; + gta02kbd = kzalloc(sizeof(struct gta02kbd), GFP_KERNEL); input_dev = input_allocate_device(); if (!gta02kbd || !input_dev) { @@ -308,15 +179,10 @@ static int gta02kbd_probe(struct platform_device *pdev) gta02kbd->pdev = pdev; timer_kbd = gta02kbd; - if (pdev->resource[0].flags != 0) - return -EINVAL; - platform_set_drvdata(pdev, gta02kbd); gta02kbd->input = input_dev; - INIT_WORK(>a02kbd->work, gta02kbd_debounce_jack); - input_dev->name = "GTA02 Buttons"; input_dev->phys = "gta02kbd/input0"; input_dev->id.bustype = BUS_HOST; @@ -326,7 +192,6 @@ static int gta02kbd_probe(struct platform_device *pdev) input_dev->dev.parent = &pdev->dev; input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_SW); - set_bit(SW_HEADPHONE_INSERT, input_dev->swbit); set_bit(KEY_PHONE, input_dev->keybit); set_bit(KEY_PAUSE, input_dev->keybit); @@ -334,21 +199,6 @@ static int gta02kbd_probe(struct platform_device *pdev) if (rc) goto out_register; - gta02kbd->cdev = device_create(gta02kbd_switch_class, - &pdev->dev, 0, gta02kbd, "headset"); - if (unlikely(IS_ERR(gta02kbd->cdev))) { - rc = PTR_ERR(gta02kbd->cdev); - goto out_device_create; - } - - rc = device_create_file(gta02kbd->cdev, &dev_attr_name); - if(rc) - goto out_device_create_file; - - rc = device_create_file(gta02kbd->cdev, &dev_attr_state); - if(rc) - goto out_device_create_file; - /* register GPIO IRQs */ for(n = 0; n < min(pdev->num_resources, ARRAY_SIZE(keys)); n++) { @@ -371,18 +221,15 @@ static int gta02kbd_probe(struct platform_device *pdev) free_irq(gpio_to_irq(pdev->resource[n].start), gta02kbd); } - goto out_device_create_file; + goto out_device_create; } keys[n].irq = irq; } - enable_irq_wake(keys[GTA02_KEY_JACK].irq); return 0; -out_device_create_file: - device_unregister(gta02kbd->cdev); out_device_create: input_unregister_device(gta02kbd->input); out_register: @@ -397,11 +244,9 @@ static int gta02kbd_remove(struct platform_device *pdev) { struct gta02kbd *gta02kbd = platform_get_drvdata(pdev); - free_irq(gpio_to_irq(pdev->resource[2].start), gta02kbd); free_irq(gpio_to_irq(pdev->resource[1].start), gta02kbd); free_irq(gpio_to_irq(pdev->resource[0].start), gta02kbd); - device_unregister(gta02kbd->cdev); input_unregister_device(gta02kbd->input); input_free_device(gta02kbd->input); platform_set_drvdata(pdev, NULL); @@ -422,16 +267,12 @@ static struct platform_driver gta02kbd_driver = { static int __devinit gta02kbd_init(void) { - gta02kbd_switch_class = class_create(THIS_MODULE, "switch"); - if (IS_ERR(gta02kbd_switch_class)) - return PTR_ERR(gta02kbd_switch_class); return platform_driver_register(>a02kbd_driver); } static void __exit gta02kbd_exit(void) { platform_driver_unregister(>a02kbd_driver); - class_destroy(gta02kbd_switch_class); } module_init(gta02kbd_init); |