1 files changed, 0 insertions, 337 deletions

diff --git a/drivers/staging/dream/gpio_input.c b/drivers/staging/dream/gpio_input.c
deleted file mode 100644
index ca29e5eb070..00000000000
--- a/drivers/staging/dream/gpio_input.c
+++ /dev/null
@@ -1,337 +0,0 @@
-/* drivers/input/misc/gpio_input.c
- *
- * Copyright (C) 2007 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/gpio.h>
-#include <linux/gpio_event.h>
-#include <linux/hrtimer.h>
-#include <linux/input.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-
-enum {
-	DEBOUNCE_UNSTABLE     = BIT(0),	/* Got irq, while debouncing */
-	DEBOUNCE_PRESSED      = BIT(1),
-	DEBOUNCE_NOTPRESSED   = BIT(2),
-	DEBOUNCE_WAIT_IRQ     = BIT(3),	/* Stable irq state */
-	DEBOUNCE_POLL         = BIT(4),	/* Stable polling state */
-
-	DEBOUNCE_UNKNOWN =
-		DEBOUNCE_PRESSED | DEBOUNCE_NOTPRESSED,
-};
-
-struct gpio_key_state {
-	struct gpio_input_state *ds;
-	uint8_t debounce;
-};
-
-struct gpio_input_state {
-	struct input_dev *input_dev;
-	const struct gpio_event_input_info *info;
-	struct hrtimer timer;
-	int use_irq;
-	int debounce_count;
-	spinlock_t irq_lock;
-	struct gpio_key_state key_state[0];
-};
-
-static enum hrtimer_restart gpio_event_input_timer_func(struct hrtimer *timer)
-{
-	int i;
-	int pressed;
-	struct gpio_input_state *ds =
-		container_of(timer, struct gpio_input_state, timer);
-	unsigned gpio_flags = ds->info->flags;
-	unsigned npolarity;
-	int nkeys = ds->info->keymap_size;
-	const struct gpio_event_direct_entry *key_entry;
-	struct gpio_key_state *key_state;
-	unsigned long irqflags;
-	uint8_t debounce;
-
-#if 0
-	key_entry = kp->keys_info->keymap;
-	key_state = kp->key_state;
-	for (i = 0; i < nkeys; i++, key_entry++, key_state++)
-		pr_info("gpio_read_detect_status %d %d\n", key_entry->gpio,
-			gpio_read_detect_status(key_entry->gpio));
-#endif
-	key_entry = ds->info->keymap;
-	key_state = ds->key_state;
-	spin_lock_irqsave(&ds->irq_lock, irqflags);
-	for (i = 0; i < nkeys; i++, key_entry++, key_state++) {
-		debounce = key_state->debounce;
-		if (debounce & DEBOUNCE_WAIT_IRQ)
-			continue;
-		if (key_state->debounce & DEBOUNCE_UNSTABLE) {
-			debounce = key_state->debounce = DEBOUNCE_UNKNOWN;
-			enable_irq(gpio_to_irq(key_entry->gpio));
-			pr_info("gpio_keys_scan_keys: key %x-%x, %d "
-				"(%d) continue debounce\n",
-				ds->info->type, key_entry->code,
-				i, key_entry->gpio);
-		}
-		npolarity = !(gpio_flags & GPIOEDF_ACTIVE_HIGH);
-		pressed = gpio_get_value(key_entry->gpio) ^ npolarity;
-		if (debounce & DEBOUNCE_POLL) {
-			if (pressed == !(debounce & DEBOUNCE_PRESSED)) {
-				ds->debounce_count++;
-				key_state->debounce = DEBOUNCE_UNKNOWN;
-				if (gpio_flags & GPIOEDF_PRINT_KEY_DEBOUNCE)
-					pr_info("gpio_keys_scan_keys: key %x-"
-						"%x, %d (%d) start debounce\n",
-						ds->info->type, key_entry->code,
-						i, key_entry->gpio);
-			}
-			continue;
-		}
-		if (pressed && (debounce & DEBOUNCE_NOTPRESSED)) {
-			if (gpio_flags & GPIOEDF_PRINT_KEY_DEBOUNCE)
-				pr_info("gpio_keys_scan_keys: key %x-%x, %d "
-					"(%d) debounce pressed 1\n",
-					ds->info->type, key_entry->code,
-					i, key_entry->gpio);
-			key_state->debounce = DEBOUNCE_PRESSED;
-			continue;
-		}
-		if (!pressed && (debounce & DEBOUNCE_PRESSED)) {
-			if (gpio_flags & GPIOEDF_PRINT_KEY_DEBOUNCE)
-				pr_info("gpio_keys_scan_keys: key %x-%x, %d "
-					"(%d) debounce pressed 0\n",
-					ds->info->type, key_entry->code,
-					i, key_entry->gpio);
-			key_state->debounce = DEBOUNCE_NOTPRESSED;
-			continue;
-		}
-		/* key is stable */
-		ds->debounce_count--;
-		if (ds->use_irq)
-			key_state->debounce |= DEBOUNCE_WAIT_IRQ;
-		else
-			key_state->debounce |= DEBOUNCE_POLL;
-		if (gpio_flags & GPIOEDF_PRINT_KEYS)
-			pr_info("gpio_keys_scan_keys: key %x-%x, %d (%d) "
-				"changed to %d\n", ds->info->type,
-				key_entry->code, i, key_entry->gpio, pressed);
-		input_event(ds->input_dev, ds->info->type,
-			    key_entry->code, pressed);
-	}
-
-#if 0
-	key_entry = kp->keys_info->keymap;
-	key_state = kp->key_state;
-	for (i = 0; i < nkeys; i++, key_entry++, key_state++) {
-		pr_info("gpio_read_detect_status %d %d\n", key_entry->gpio,
-			gpio_read_detect_status(key_entry->gpio));
-	}
-#endif
-
-	if (ds->debounce_count)
-		hrtimer_start(timer, ds->info->debounce_time, HRTIMER_MODE_REL);
-	else if (!ds->use_irq)
-		hrtimer_start(timer, ds->info->poll_time, HRTIMER_MODE_REL);
-
-	spin_unlock_irqrestore(&ds->irq_lock, irqflags);
-
-	return HRTIMER_NORESTART;
-}
-
-static irqreturn_t gpio_event_input_irq_handler(int irq, void *dev_id)
-{
-	struct gpio_key_state *ks = dev_id;
-	struct gpio_input_state *ds = ks->ds;
-	int keymap_index = ks - ds->key_state;
-	const struct gpio_event_direct_entry *key_entry;
-	unsigned long irqflags;
-	int pressed;
-
-	if (!ds->use_irq)
-		return IRQ_HANDLED;
-
-	key_entry = &ds->info->keymap[keymap_index];
-
-	if (ds->info->debounce_time.tv64) {
-		spin_lock_irqsave(&ds->irq_lock, irqflags);
-		if (ks->debounce & DEBOUNCE_WAIT_IRQ) {
-			ks->debounce = DEBOUNCE_UNKNOWN;
-			if (ds->debounce_count++ == 0) {
-				hrtimer_start(
-					&ds->timer, ds->info->debounce_time,
-					HRTIMER_MODE_REL);
-			}
-			if (ds->info->flags & GPIOEDF_PRINT_KEY_DEBOUNCE)
-				pr_info("gpio_event_input_irq_handler: "
-					"key %x-%x, %d (%d) start debounce\n",
-					ds->info->type, key_entry->code,
-					keymap_index, key_entry->gpio);
-		} else {
-			disable_irq(irq);
-			ks->debounce = DEBOUNCE_UNSTABLE;
-		}
-		spin_unlock_irqrestore(&ds->irq_lock, irqflags);
-	} else {
-		pressed = gpio_get_value(key_entry->gpio) ^
-			!(ds->info->flags & GPIOEDF_ACTIVE_HIGH);
-		if (ds->info->flags & GPIOEDF_PRINT_KEYS)
-			pr_info("gpio_event_input_irq_handler: key %x-%x, %d "
-				"(%d) changed to %d\n",
-				ds->info->type, key_entry->code, keymap_index,
-				key_entry->gpio, pressed);
-		input_event(ds->input_dev, ds->info->type,
-			    key_entry->code, pressed);
-	}
-	return IRQ_HANDLED;
-}
-
-static int gpio_event_input_request_irqs(struct gpio_input_state *ds)
-{
-	int i;
-	int err;
-	unsigned int irq;
-	unsigned long req_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
-
-	for (i = 0; i < ds->info->keymap_size; i++) {
-		err = irq = gpio_to_irq(ds->info->keymap[i].gpio);
-		if (err < 0)
-			goto err_gpio_get_irq_num_failed;
-		err = request_irq(irq, gpio_event_input_irq_handler,
-				  req_flags, "gpio_keys", &ds->key_state[i]);
-		if (err) {
-			pr_err("gpio_event_input_request_irqs: request_irq "
-				"failed for input %d, irq %d\n",
-				ds->info->keymap[i].gpio, irq);
-			goto err_request_irq_failed;
-		}
-		enable_irq_wake(irq);
-	}
-	return 0;
-
-	for (i = ds->info->keymap_size - 1; i >= 0; i--) {
-		free_irq(gpio_to_irq(ds->info->keymap[i].gpio),
-			 &ds->key_state[i]);
-err_request_irq_failed:
-err_gpio_get_irq_num_failed:
-		;
-	}
-	return err;
-}
-
-int gpio_event_input_func(struct input_dev *input_dev,
-			struct gpio_event_info *info, void **data, int func)
-{
-	int ret;
-	int i;
-	unsigned long irqflags;
-	struct gpio_event_input_info *di;
-	struct gpio_input_state *ds = *data;
-
-	di = container_of(info, struct gpio_event_input_info, info);
-
-	if (func == GPIO_EVENT_FUNC_SUSPEND) {
-		spin_lock_irqsave(&ds->irq_lock, irqflags);
-		if (ds->use_irq)
-			for (i = 0; i < di->keymap_size; i++)
-				disable_irq(gpio_to_irq(di->keymap[i].gpio));
-		spin_unlock_irqrestore(&ds->irq_lock, irqflags);
-		hrtimer_cancel(&ds->timer);
-		return 0;
-	}
-	if (func == GPIO_EVENT_FUNC_RESUME) {
-		spin_lock_irqsave(&ds->irq_lock, irqflags);
-		if (ds->use_irq)
-			for (i = 0; i < di->keymap_size; i++)
-				enable_irq(gpio_to_irq(di->keymap[i].gpio));
-		hrtimer_start(&ds->timer, ktime_set(0, 0), HRTIMER_MODE_REL);
-		spin_unlock_irqrestore(&ds->irq_lock, irqflags);
-		return 0;
-	}
-
-	if (func == GPIO_EVENT_FUNC_INIT) {
-		if (ktime_to_ns(di->poll_time) <= 0)
-			di->poll_time = ktime_set(0, 20 * NSEC_PER_MSEC);
-
-		*data = ds = kzalloc(sizeof(*ds) + sizeof(ds->key_state[0]) *
-					di->keymap_size, GFP_KERNEL);
-		if (ds == NULL) {
-			ret = -ENOMEM;
-			pr_err("gpio_event_input_func: "
-				"Failed to allocate private data\n");
-			goto err_ds_alloc_failed;
-		}
-		ds->debounce_count = di->keymap_size;
-		ds->input_dev = input_dev;
-		ds->info = di;
-		spin_lock_init(&ds->irq_lock);
-
-		for (i = 0; i < di->keymap_size; i++) {
-			input_set_capability(input_dev, di->type,
-					     di->keymap[i].code);
-			ds->key_state[i].ds = ds;
-			ds->key_state[i].debounce = DEBOUNCE_UNKNOWN;
-		}
-
-		for (i = 0; i < di->keymap_size; i++) {
-			ret = gpio_request(di->keymap[i].gpio, "gpio_kp_in");
-			if (ret) {
-				pr_err("gpio_event_input_func: gpio_request "
-					"failed for %d\n", di->keymap[i].gpio);
-				goto err_gpio_request_failed;
-			}
-			ret = gpio_direction_input(di->keymap[i].gpio);
-			if (ret) {
-				pr_err("gpio_event_input_func: "
-					"gpio_direction_input failed for %d\n",
-					di->keymap[i].gpio);
-				goto err_gpio_configure_failed;
-			}
-		}
-
-		ret = gpio_event_input_request_irqs(ds);
-
-		spin_lock_irqsave(&ds->irq_lock, irqflags);
-		ds->use_irq = ret == 0;
-
-		pr_info("GPIO Input Driver: Start gpio inputs for %s in %s "
-			"mode\n",
-			input_dev->name, ret == 0 ? "interrupt" : "polling");
-
-		hrtimer_init(&ds->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-		ds->timer.function = gpio_event_input_timer_func;
-		hrtimer_start(&ds->timer, ktime_set(0, 0), HRTIMER_MODE_REL);
-		spin_unlock_irqrestore(&ds->irq_lock, irqflags);
-		return 0;
-	}
-
-	ret = 0;
-	spin_lock_irqsave(&ds->irq_lock, irqflags);
-	hrtimer_cancel(&ds->timer);
-	if (ds->use_irq) {
-		for (i = di->keymap_size - 1; i >= 0; i--) {
-			free_irq(gpio_to_irq(di->keymap[i].gpio),
-				 &ds->key_state[i]);
-		}
-	}
-	spin_unlock_irqrestore(&ds->irq_lock, irqflags);
-
-	for (i = di->keymap_size - 1; i >= 0; i--) {
-err_gpio_configure_failed:
-		gpio_free(di->keymap[i].gpio);
-err_gpio_request_failed:
-		;
-	}
-	kfree(ds);
-err_ds_alloc_failed:
-	return ret;
-}