+++ /dev/null
-From 6730377482c05a1742abb92f1463701f5d084a27 Mon Sep 17 00:00:00 2001
-From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
-Date: Wed, 15 Oct 2008 18:23:47 -0700
-Subject: [PATCH 086/134] Input: Generic GPIO Input device.
-MIME-Version: 1.0
-Content-Type: text/plain; charset=utf-8
-Content-Transfer-Encoding: 8bit
-
-Supports keyboard matrixces, direct inputs, direct outputs and axes connected to gpios.
-
-Signed-off-by: Arve Hjønnevåg <arve@android.com>
-Signed-off-by: Nick Pelly <npelly@google.com>
----
- drivers/input/misc/Kconfig | 5 +
- drivers/input/misc/Makefile | 1 +
- drivers/input/misc/gpio_axis.c | 180 +++++++++++++++++
- drivers/input/misc/gpio_event.c | 224 +++++++++++++++++++++
- drivers/input/misc/gpio_input.c | 343 ++++++++++++++++++++++++++++++++
- drivers/input/misc/gpio_matrix.c | 406 ++++++++++++++++++++++++++++++++++++++
- drivers/input/misc/gpio_output.c | 84 ++++++++
- include/linux/gpio_event.h | 154 ++++++++++++++
- 8 files changed, 1397 insertions(+), 0 deletions(-)
- create mode 100644 drivers/input/misc/gpio_axis.c
- create mode 100644 drivers/input/misc/gpio_event.c
- create mode 100644 drivers/input/misc/gpio_input.c
- create mode 100644 drivers/input/misc/gpio_matrix.c
- create mode 100644 drivers/input/misc/gpio_output.c
- create mode 100644 include/linux/gpio_event.h
-
---- a/drivers/input/misc/Kconfig
-+++ b/drivers/input/misc/Kconfig
-@@ -212,6 +212,11 @@ config INPUT_SGI_BTNS
- To compile this driver as a module, choose M here: the
- module will be called sgi_btns.
-
-+config INPUT_GPIO
-+ tristate "GPIO driver support"
-+ help
-+ Say Y here if you want to support gpio based keys, wheels etc...
-+
- config HP_SDC_RTC
- tristate "HP SDC Real Time Clock"
- depends on (GSC || HP300) && SERIO
---- a/drivers/input/misc/Makefile
-+++ b/drivers/input/misc/Makefile
-@@ -25,3 +25,5 @@ obj-$(CONFIG_INPUT_UINPUT) += uinput.o
- obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
- obj-$(CONFIG_INPUT_YEALINK) += yealink.o
- obj-$(CONFIG_INPUT_GPIO_BUTTONS) += gpio_buttons.o
-+obj-$(CONFIG_INPUT_GPIO) += gpio_event.o gpio_matrix.o gpio_input.o gpio_output.o gpio_axis.o
-+
---- /dev/null
-+++ b/drivers/input/misc/gpio_axis.c
-@@ -0,0 +1,180 @@
-+/* drivers/input/misc/gpio_axis.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/interrupt.h>
-+
-+struct gpio_axis_state {
-+ struct input_dev *input_dev;
-+ struct gpio_event_axis_info *info;
-+ uint32_t pos;
-+};
-+
-+uint16_t gpio_axis_4bit_gray_map_table[] = {
-+ [0x0] = 0x0, [0x1] = 0x1, /* 0000 0001 */
-+ [0x3] = 0x2, [0x2] = 0x3, /* 0011 0010 */
-+ [0x6] = 0x4, [0x7] = 0x5, /* 0110 0111 */
-+ [0x5] = 0x6, [0x4] = 0x7, /* 0101 0100 */
-+ [0xc] = 0x8, [0xd] = 0x9, /* 1100 1101 */
-+ [0xf] = 0xa, [0xe] = 0xb, /* 1111 1110 */
-+ [0xa] = 0xc, [0xb] = 0xd, /* 1010 1011 */
-+ [0x9] = 0xe, [0x8] = 0xf, /* 1001 1000 */
-+};
-+uint16_t gpio_axis_4bit_gray_map(struct gpio_event_axis_info *info, uint16_t in)
-+{
-+ return gpio_axis_4bit_gray_map_table[in];
-+}
-+
-+uint16_t gpio_axis_5bit_singletrack_map_table[] = {
-+ [0x10] = 0x00, [0x14] = 0x01, [0x1c] = 0x02, /* 10000 10100 11100 */
-+ [0x1e] = 0x03, [0x1a] = 0x04, [0x18] = 0x05, /* 11110 11010 11000 */
-+ [0x08] = 0x06, [0x0a] = 0x07, [0x0e] = 0x08, /* 01000 01010 01110 */
-+ [0x0f] = 0x09, [0x0d] = 0x0a, [0x0c] = 0x0b, /* 01111 01101 01100 */
-+ [0x04] = 0x0c, [0x05] = 0x0d, [0x07] = 0x0e, /* 00100 00101 00111 */
-+ [0x17] = 0x0f, [0x16] = 0x10, [0x06] = 0x11, /* 10111 10110 00110 */
-+ [0x02] = 0x12, [0x12] = 0x13, [0x13] = 0x14, /* 00010 10010 10011 */
-+ [0x1b] = 0x15, [0x0b] = 0x16, [0x03] = 0x17, /* 11011 01011 00011 */
-+ [0x01] = 0x18, [0x09] = 0x19, [0x19] = 0x1a, /* 00001 01001 11001 */
-+ [0x1d] = 0x1b, [0x15] = 0x1c, [0x11] = 0x1d, /* 11101 10101 10001 */
-+};
-+uint16_t gpio_axis_5bit_singletrack_map(
-+ struct gpio_event_axis_info *info, uint16_t in)
-+{
-+ return gpio_axis_5bit_singletrack_map_table[in];
-+}
-+
-+static void gpio_event_update_axis(struct gpio_axis_state *as, int report)
-+{
-+ struct gpio_event_axis_info *ai = as->info;
-+ int i;
-+ int change;
-+ uint16_t state = 0;
-+ uint16_t pos;
-+ uint16_t old_pos = as->pos;
-+ for (i = ai->count - 1; i >= 0; i--)
-+ state = (state << 1) | gpio_get_value(ai->gpio[i]);
-+ pos = ai->map(ai, state);
-+ if (ai->flags & GPIOEAF_PRINT_RAW)
-+ pr_info("axis %d-%d raw %x, pos %d -> %d\n",
-+ ai->type, ai->code, state, old_pos, pos);
-+ if (report && pos != old_pos) {
-+ if (ai->type == EV_REL) {
-+ change = (ai->decoded_size + pos - old_pos) %
-+ ai->decoded_size;
-+ if (change > ai->decoded_size / 2)
-+ change -= ai->decoded_size;
-+ if (change == ai->decoded_size / 2) {
-+ if (ai->flags & GPIOEAF_PRINT_EVENT)
-+ pr_info("axis %d-%d unknown direction, "
-+ "pos %d -> %d\n", ai->type,
-+ ai->code, old_pos, pos);
-+ change = 0; /* no closest direction */
-+ }
-+ if (ai->flags & GPIOEAF_PRINT_EVENT)
-+ pr_info("axis %d-%d change %d\n",
-+ ai->type, ai->code, change);
-+ input_report_rel(as->input_dev, ai->code, change);
-+ } else {
-+ if (ai->flags & GPIOEAF_PRINT_EVENT)
-+ pr_info("axis %d-%d now %d\n",
-+ ai->type, ai->code, pos);
-+ input_event(as->input_dev, ai->type, ai->code, pos);
-+ }
-+ input_sync(as->input_dev);
-+ }
-+ as->pos = pos;
-+}
-+
-+static irqreturn_t gpio_axis_irq_handler(int irq, void *dev_id)
-+{
-+ struct gpio_axis_state *as = dev_id;
-+ gpio_event_update_axis(as, 1);
-+ return IRQ_HANDLED;
-+}
-+
-+int gpio_event_axis_func(struct input_dev *input_dev,
-+ struct gpio_event_info *info, void **data, int func)
-+{
-+ int ret;
-+ int i;
-+ int irq;
-+ struct gpio_event_axis_info *ai;
-+ struct gpio_axis_state *as;
-+
-+ ai = container_of(info, struct gpio_event_axis_info, info);
-+ if (func == GPIO_EVENT_FUNC_SUSPEND) {
-+ for (i = 0; i < ai->count; i++)
-+ disable_irq(gpio_to_irq(ai->gpio[i]));
-+ return 0;
-+ }
-+ if (func == GPIO_EVENT_FUNC_RESUME) {
-+ for (i = 0; i < ai->count; i++)
-+ enable_irq(gpio_to_irq(ai->gpio[i]));
-+ return 0;
-+ }
-+
-+ if (func == GPIO_EVENT_FUNC_INIT) {
-+ *data = as = kmalloc(sizeof(*as), GFP_KERNEL);
-+ if (as == NULL) {
-+ ret = -ENOMEM;
-+ goto err_alloc_axis_state_failed;
-+ }
-+ as->input_dev = input_dev;
-+ as->info = ai;
-+
-+ input_set_capability(input_dev, ai->type, ai->code);
-+ if (ai->type == EV_ABS) {
-+ input_set_abs_params(input_dev, ai->code, 0,
-+ ai->decoded_size - 1, 0, 0);
-+ }
-+ for (i = 0; i < ai->count; i++) {
-+ ret = gpio_request(ai->gpio[i], "gpio_event_axis");
-+ if (ret < 0)
-+ goto err_request_gpio_failed;
-+ ret = gpio_direction_input(ai->gpio[i]);
-+ if (ret < 0)
-+ goto err_gpio_direction_input_failed;
-+ ret = irq = gpio_to_irq(ai->gpio[i]);
-+ if (ret < 0)
-+ goto err_get_irq_num_failed;
-+ ret = request_irq(irq, gpio_axis_irq_handler,
-+ IRQF_TRIGGER_RISING |
-+ IRQF_TRIGGER_FALLING,
-+ "gpio_event_axis", as);
-+ if (ret < 0)
-+ goto err_request_irq_failed;
-+ }
-+ gpio_event_update_axis(as, 0);
-+ return 0;
-+ }
-+
-+ ret = 0;
-+ as = *data;
-+ for (i = ai->count - 1; i >= 0; i--) {
-+ free_irq(gpio_to_irq(ai->gpio[i]), as);
-+err_request_irq_failed:
-+err_get_irq_num_failed:
-+err_gpio_direction_input_failed:
-+ gpio_free(ai->gpio[i]);
-+err_request_gpio_failed:
-+ ;
-+ }
-+ kfree(as);
-+ *data = NULL;
-+err_alloc_axis_state_failed:
-+ return ret;
-+}
---- /dev/null
-+++ b/drivers/input/misc/gpio_event.c
-@@ -0,0 +1,224 @@
-+/* drivers/input/misc/gpio_event.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/earlysuspend.h>
-+#include <linux/module.h>
-+#include <linux/input.h>
-+#include <linux/gpio_event.h>
-+#include <linux/hrtimer.h>
-+#include <linux/platform_device.h>
-+
-+struct gpio_event {
-+ struct input_dev *input_dev;
-+ const struct gpio_event_platform_data *info;
-+ struct early_suspend early_suspend;
-+ void *state[0];
-+};
-+
-+static int gpio_input_event(
-+ struct input_dev *dev, unsigned int type, unsigned int code, int value)
-+{
-+ int i;
-+ int ret = 0;
-+ int tmp_ret;
-+ struct gpio_event_info **ii;
-+ struct gpio_event *ip = input_get_drvdata(dev);
-+
-+ for (i = 0, ii = ip->info->info; i < ip->info->info_count; i++, ii++) {
-+ if ((*ii)->event) {
-+ tmp_ret = (*ii)->event(ip->input_dev, *ii,
-+ &ip->state[i], type, code, value);
-+ if (tmp_ret)
-+ ret = tmp_ret;
-+ }
-+ }
-+ return ret;
-+}
-+
-+static int gpio_event_call_all_func(struct gpio_event *ip, int func)
-+{
-+ int i;
-+ int ret;
-+ struct gpio_event_info **ii;
-+
-+ if (func == GPIO_EVENT_FUNC_INIT || func == GPIO_EVENT_FUNC_RESUME) {
-+ ii = ip->info->info;
-+ for (i = 0; i < ip->info->info_count; i++, ii++) {
-+ if ((*ii)->func == NULL) {
-+ ret = -ENODEV;
-+ pr_err("gpio_event_probe: Incomplete pdata, "
-+ "no function\n");
-+ goto err_no_func;
-+ }
-+ ret = (*ii)->func(ip->input_dev, *ii, &ip->state[i],
-+ func);
-+ if (ret) {
-+ pr_err("gpio_event_probe: function failed\n");
-+ goto err_func_failed;
-+ }
-+ }
-+ return 0;
-+ }
-+
-+ ret = 0;
-+ i = ip->info->info_count;
-+ ii = ip->info->info + i;
-+ while (i > 0) {
-+ i--;
-+ ii--;
-+ (*ii)->func(ip->input_dev, *ii, &ip->state[i], func & ~1);
-+err_func_failed:
-+err_no_func:
-+ ;
-+ }
-+ return ret;
-+}
-+
-+#ifdef CONFIG_HAS_EARLYSUSPEND
-+void gpio_event_suspend(struct early_suspend *h)
-+{
-+ struct gpio_event *ip;
-+ ip = container_of(h, struct gpio_event, early_suspend);
-+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_SUSPEND);
-+ ip->info->power(ip->info, 0);
-+}
-+
-+void gpio_event_resume(struct early_suspend *h)
-+{
-+ struct gpio_event *ip;
-+ ip = container_of(h, struct gpio_event, early_suspend);
-+ ip->info->power(ip->info, 1);
-+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_RESUME);
-+}
-+#endif
-+
-+static int __init gpio_event_probe(struct platform_device *pdev)
-+{
-+ int err;
-+ struct gpio_event *ip;
-+ struct input_dev *input_dev;
-+ struct gpio_event_platform_data *event_info;
-+
-+ event_info = pdev->dev.platform_data;
-+ if (event_info == NULL) {
-+ pr_err("gpio_event_probe: No pdata\n");
-+ return -ENODEV;
-+ }
-+ if (event_info->name == NULL ||
-+ event_info->info == NULL ||
-+ event_info->info_count == 0) {
-+ pr_err("gpio_event_probe: Incomplete pdata\n");
-+ return -ENODEV;
-+ }
-+ ip = kzalloc(sizeof(*ip) +
-+ sizeof(ip->state[0]) * event_info->info_count, GFP_KERNEL);
-+ if (ip == NULL) {
-+ err = -ENOMEM;
-+ pr_err("gpio_event_probe: Failed to allocate private data\n");
-+ goto err_kp_alloc_failed;
-+ }
-+ platform_set_drvdata(pdev, ip);
-+
-+ input_dev = input_allocate_device();
-+ if (input_dev == NULL) {
-+ err = -ENOMEM;
-+ pr_err("gpio_event_probe: Failed to allocate input device\n");
-+ goto err_input_dev_alloc_failed;
-+ }
-+ input_set_drvdata(input_dev, ip);
-+ ip->input_dev = input_dev;
-+ ip->info = event_info;
-+ if (event_info->power) {
-+#ifdef CONFIG_HAS_EARLYSUSPEND
-+ ip->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
-+ ip->early_suspend.suspend = gpio_event_suspend;
-+ ip->early_suspend.resume = gpio_event_resume;
-+ register_early_suspend(&ip->early_suspend);
-+#endif
-+ ip->info->power(ip->info, 1);
-+ }
-+
-+ input_dev->name = ip->info->name;
-+ input_dev->event = gpio_input_event;
-+
-+ err = gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_INIT);
-+ if (err)
-+ goto err_call_all_func_failed;
-+
-+ err = input_register_device(input_dev);
-+ if (err) {
-+ pr_err("gpio_event_probe: Unable to register %s input device\n",
-+ input_dev->name);
-+ goto err_input_register_device_failed;
-+ }
-+
-+ return 0;
-+
-+err_input_register_device_failed:
-+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_UNINIT);
-+err_call_all_func_failed:
-+ if (event_info->power) {
-+#ifdef CONFIG_HAS_EARLYSUSPEND
-+ unregister_early_suspend(&ip->early_suspend);
-+#endif
-+ ip->info->power(ip->info, 0);
-+ }
-+ input_free_device(input_dev);
-+err_input_dev_alloc_failed:
-+ kfree(ip);
-+err_kp_alloc_failed:
-+ return err;
-+}
-+
-+static int gpio_event_remove(struct platform_device *pdev)
-+{
-+ struct gpio_event *ip = platform_get_drvdata(pdev);
-+
-+ gpio_event_call_all_func(ip, GPIO_EVENT_FUNC_UNINIT);
-+ if (ip->info->power) {
-+#ifdef CONFIG_HAS_EARLYSUSPEND
-+ unregister_early_suspend(&ip->early_suspend);
-+#endif
-+ ip->info->power(ip->info, 0);
-+ }
-+ input_unregister_device(ip->input_dev);
-+ kfree(ip);
-+ return 0;
-+}
-+
-+static struct platform_driver gpio_event_driver = {
-+ .probe = gpio_event_probe,
-+ .remove = gpio_event_remove,
-+ .driver = {
-+ .name = GPIO_EVENT_DEV_NAME,
-+ },
-+};
-+
-+static int __devinit gpio_event_init(void)
-+{
-+ return platform_driver_register(&gpio_event_driver);
-+}
-+
-+static void __exit gpio_event_exit(void)
-+{
-+ platform_driver_unregister(&gpio_event_driver);
-+}
-+
-+module_init(gpio_event_init);
-+module_exit(gpio_event_exit);
-+
-+MODULE_DESCRIPTION("GPIO Event Driver");
-+MODULE_LICENSE("GPL");
-+
---- /dev/null
-+++ b/drivers/input/misc/gpio_input.c
-@@ -0,0 +1,343 @@
-+/* 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/wakelock.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 wake_lock wake_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);
-+ else
-+ wake_unlock(&ds->wake_lock);
-+
-+ 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) {
-+ wake_lock(&ds->wake_lock);
-+ 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;
-+ wake_lock_init(&ds->wake_lock, WAKE_LOCK_SUSPEND, "gpio_input");
-+ 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:
-+ ;
-+ }
-+ wake_lock_destroy(&ds->wake_lock);
-+ kfree(ds);
-+err_ds_alloc_failed:
-+ return ret;
-+}
---- /dev/null
-+++ b/drivers/input/misc/gpio_matrix.c
-@@ -0,0 +1,406 @@
-+/* drivers/input/misc/gpio_matrix.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/interrupt.h>
-+#include <linux/wakelock.h>
-+
-+struct gpio_kp {
-+ struct input_dev *input_dev;
-+ struct gpio_event_matrix_info *keypad_info;
-+ struct hrtimer timer;
-+ struct wake_lock wake_lock;
-+ int current_output;
-+ unsigned int use_irq:1;
-+ unsigned int key_state_changed:1;
-+ unsigned int last_key_state_changed:1;
-+ unsigned int some_keys_pressed:2;
-+ unsigned long keys_pressed[0];
-+};
-+
-+static void clear_phantom_key(struct gpio_kp *kp, int out, int in)
-+{
-+ struct gpio_event_matrix_info *mi = kp->keypad_info;
-+ int key_index = out * mi->ninputs + in;
-+ unsigned short keycode = mi->keymap[key_index];;
-+
-+ if (!test_bit(keycode, kp->input_dev->key)) {
-+ if (mi->flags & GPIOKPF_PRINT_PHANTOM_KEYS)
-+ pr_info("gpiomatrix: phantom key %x, %d-%d (%d-%d) "
-+ "cleared\n", keycode, out, in,
-+ mi->output_gpios[out], mi->input_gpios[in]);
-+ __clear_bit(key_index, kp->keys_pressed);
-+ } else {
-+ if (mi->flags & GPIOKPF_PRINT_PHANTOM_KEYS)
-+ pr_info("gpiomatrix: phantom key %x, %d-%d (%d-%d) "
-+ "not cleared\n", keycode, out, in,
-+ mi->output_gpios[out], mi->input_gpios[in]);
-+ }
-+}
-+
-+static int restore_keys_for_input(struct gpio_kp *kp, int out, int in)
-+{
-+ int rv = 0;
-+ int key_index;
-+
-+ key_index = out * kp->keypad_info->ninputs + in;
-+ while (out < kp->keypad_info->noutputs) {
-+ if (test_bit(key_index, kp->keys_pressed)) {
-+ rv = 1;
-+ clear_phantom_key(kp, out, in);
-+ }
-+ key_index += kp->keypad_info->ninputs;
-+ out++;
-+ }
-+ return rv;
-+}
-+
-+static void remove_phantom_keys(struct gpio_kp *kp)
-+{
-+ int out, in, inp;
-+ int key_index;
-+
-+ if (kp->some_keys_pressed < 3)
-+ return;
-+
-+ for (out = 0; out < kp->keypad_info->noutputs; out++) {
-+ inp = -1;
-+ key_index = out * kp->keypad_info->ninputs;
-+ for (in = 0; in < kp->keypad_info->ninputs; in++, key_index++) {
-+ if (test_bit(key_index, kp->keys_pressed)) {
-+ if (inp == -1) {
-+ inp = in;
-+ continue;
-+ }
-+ if (inp >= 0) {
-+ if (!restore_keys_for_input(kp, out + 1,
-+ inp))
-+ break;
-+ clear_phantom_key(kp, out, inp);
-+ inp = -2;
-+ }
-+ restore_keys_for_input(kp, out, in);
-+ }
-+ }
-+ }
-+}
-+
-+static void report_key(struct gpio_kp *kp, int key_index, int out, int in)
-+{
-+ struct gpio_event_matrix_info *mi = kp->keypad_info;
-+ int pressed = test_bit(key_index, kp->keys_pressed);
-+ unsigned short keycode = mi->keymap[key_index];
-+ if (pressed != test_bit(keycode, kp->input_dev->key)) {
-+ if (keycode == KEY_RESERVED) {
-+ if (mi->flags & GPIOKPF_PRINT_UNMAPPED_KEYS)
-+ pr_info("gpiomatrix: unmapped key, %d-%d "
-+ "(%d-%d) changed to %d\n",
-+ out, in, mi->output_gpios[out],
-+ mi->input_gpios[in], pressed);
-+ } else {
-+ if (mi->flags & GPIOKPF_PRINT_MAPPED_KEYS)
-+ pr_info("gpiomatrix: key %x, %d-%d (%d-%d) "
-+ "changed to %d\n", keycode,
-+ out, in, mi->output_gpios[out],
-+ mi->input_gpios[in], pressed);
-+ input_report_key(kp->input_dev, keycode, pressed);
-+ }
-+ }
-+}
-+
-+static enum hrtimer_restart gpio_keypad_timer_func(struct hrtimer *timer)
-+{
-+ int out, in;
-+ int key_index;
-+ int gpio;
-+ struct gpio_kp *kp = container_of(timer, struct gpio_kp, timer);
-+ struct gpio_event_matrix_info *mi = kp->keypad_info;
-+ unsigned gpio_keypad_flags = mi->flags;
-+ unsigned polarity = !!(gpio_keypad_flags & GPIOKPF_ACTIVE_HIGH);
-+
-+ out = kp->current_output;
-+ if (out == mi->noutputs) {
-+ out = 0;
-+ kp->last_key_state_changed = kp->key_state_changed;
-+ kp->key_state_changed = 0;
-+ kp->some_keys_pressed = 0;
-+ } else {
-+ key_index = out * mi->ninputs;
-+ for (in = 0; in < mi->ninputs; in++, key_index++) {
-+ gpio = mi->input_gpios[in];
-+ if (gpio_get_value(gpio) ^ !polarity) {
-+ if (kp->some_keys_pressed < 3)
-+ kp->some_keys_pressed++;
-+ kp->key_state_changed |= !__test_and_set_bit(
-+ key_index, kp->keys_pressed);
-+ } else
-+ kp->key_state_changed |= __test_and_clear_bit(
-+ key_index, kp->keys_pressed);
-+ }
-+ gpio = mi->output_gpios[out];
-+ if (gpio_keypad_flags & GPIOKPF_DRIVE_INACTIVE)
-+ gpio_set_value(gpio, !polarity);
-+ else
-+ gpio_direction_input(gpio);
-+ out++;
-+ }
-+ kp->current_output = out;
-+ if (out < mi->noutputs) {
-+ gpio = mi->output_gpios[out];
-+ if (gpio_keypad_flags & GPIOKPF_DRIVE_INACTIVE)
-+ gpio_set_value(gpio, polarity);
-+ else
-+ gpio_direction_output(gpio, polarity);
-+ hrtimer_start(timer, mi->settle_time, HRTIMER_MODE_REL);
-+ return HRTIMER_NORESTART;
-+ }
-+ if (gpio_keypad_flags & GPIOKPF_DEBOUNCE) {
-+ if (kp->key_state_changed) {
-+ hrtimer_start(&kp->timer, mi->debounce_delay,
-+ HRTIMER_MODE_REL);
-+ return HRTIMER_NORESTART;
-+ }
-+ kp->key_state_changed = kp->last_key_state_changed;
-+ }
-+ if (kp->key_state_changed) {
-+ if (gpio_keypad_flags & GPIOKPF_REMOVE_SOME_PHANTOM_KEYS)
-+ remove_phantom_keys(kp);
-+ key_index = 0;
-+ for (out = 0; out < mi->noutputs; out++)
-+ for (in = 0; in < mi->ninputs; in++, key_index++)
-+ report_key(kp, key_index, out, in);
-+ }
-+ if (!kp->use_irq || kp->some_keys_pressed) {
-+ hrtimer_start(timer, mi->poll_time, HRTIMER_MODE_REL);
-+ return HRTIMER_NORESTART;
-+ }
-+
-+ /* No keys are pressed, reenable interrupt */
-+ for (out = 0; out < mi->noutputs; out++) {
-+ if (gpio_keypad_flags & GPIOKPF_DRIVE_INACTIVE)
-+ gpio_set_value(mi->output_gpios[out], polarity);
-+ else
-+ gpio_direction_output(mi->output_gpios[out], polarity);
-+ }
-+ for (in = 0; in < mi->ninputs; in++)
-+ enable_irq(gpio_to_irq(mi->input_gpios[in]));
-+ wake_unlock(&kp->wake_lock);
-+ return HRTIMER_NORESTART;
-+}
-+
-+static irqreturn_t gpio_keypad_irq_handler(int irq_in, void *dev_id)
-+{
-+ int i;
-+ struct gpio_kp *kp = dev_id;
-+ struct gpio_event_matrix_info *mi = kp->keypad_info;
-+ unsigned gpio_keypad_flags = mi->flags;
-+
-+ if (!kp->use_irq) /* ignore interrupt while registering the handler */
-+ return IRQ_HANDLED;
-+
-+ for (i = 0; i < mi->ninputs; i++)
-+ disable_irq(gpio_to_irq(mi->input_gpios[i]));
-+ for (i = 0; i < mi->noutputs; i++) {
-+ if (gpio_keypad_flags & GPIOKPF_DRIVE_INACTIVE)
-+ gpio_set_value(mi->output_gpios[i],
-+ !(gpio_keypad_flags & GPIOKPF_ACTIVE_HIGH));
-+ else
-+ gpio_direction_input(mi->output_gpios[i]);
-+ }
-+ wake_lock(&kp->wake_lock);
-+ hrtimer_start(&kp->timer, ktime_set(0, 0), HRTIMER_MODE_REL);
-+ return IRQ_HANDLED;
-+}
-+
-+static int gpio_keypad_request_irqs(struct gpio_kp *kp)
-+{
-+ int i;
-+ int err;
-+ unsigned int irq;
-+ unsigned long request_flags;
-+ struct gpio_event_matrix_info *mi = kp->keypad_info;
-+
-+ switch (mi->flags & (GPIOKPF_ACTIVE_HIGH|GPIOKPF_LEVEL_TRIGGERED_IRQ)) {
-+ default:
-+ request_flags = IRQF_TRIGGER_FALLING;
-+ break;
-+ case GPIOKPF_ACTIVE_HIGH:
-+ request_flags = IRQF_TRIGGER_RISING;
-+ break;
-+ case GPIOKPF_LEVEL_TRIGGERED_IRQ:
-+ request_flags = IRQF_TRIGGER_LOW;
-+ break;
-+ case GPIOKPF_LEVEL_TRIGGERED_IRQ | GPIOKPF_ACTIVE_HIGH:
-+ request_flags = IRQF_TRIGGER_HIGH;
-+ break;
-+ }
-+
-+ for (i = 0; i < mi->ninputs; i++) {
-+ err = irq = gpio_to_irq(mi->input_gpios[i]);
-+ if (err < 0)
-+ goto err_gpio_get_irq_num_failed;
-+ err = request_irq(irq, gpio_keypad_irq_handler, request_flags,
-+ "gpio_kp", kp);
-+ if (err) {
-+ pr_err("gpiomatrix: request_irq failed for input %d, "
-+ "irq %d\n", mi->input_gpios[i], irq);
-+ goto err_request_irq_failed;
-+ }
-+ err = set_irq_wake(irq, 1);
-+ if (err) {
-+ pr_err("gpiomatrix: set_irq_wake failed for input %d, "
-+ "irq %d\n", mi->input_gpios[i], irq);
-+ }
-+ disable_irq(irq);
-+ }
-+ return 0;
-+
-+ for (i = mi->noutputs - 1; i >= 0; i--) {
-+ free_irq(gpio_to_irq(mi->input_gpios[i]), kp);
-+err_request_irq_failed:
-+err_gpio_get_irq_num_failed:
-+ ;
-+ }
-+ return err;
-+}
-+
-+int gpio_event_matrix_func(struct input_dev *input_dev,
-+ struct gpio_event_info *info, void **data, int func)
-+{
-+ int i;
-+ int err;
-+ int key_count;
-+ struct gpio_kp *kp;
-+ struct gpio_event_matrix_info *mi;
-+
-+ mi = container_of(info, struct gpio_event_matrix_info, info);
-+ if (func == GPIO_EVENT_FUNC_SUSPEND || func == GPIO_EVENT_FUNC_RESUME) {
-+ /* TODO: disable scanning */
-+ return 0;
-+ }
-+
-+ if (func == GPIO_EVENT_FUNC_INIT) {
-+ if (mi->keymap == NULL ||
-+ mi->input_gpios == NULL ||
-+ mi->output_gpios == NULL) {
-+ err = -ENODEV;
-+ pr_err("gpiomatrix: Incomplete pdata\n");
-+ goto err_invalid_platform_data;
-+ }
-+ key_count = mi->ninputs * mi->noutputs;
-+
-+ *data = kp = kzalloc(sizeof(*kp) + sizeof(kp->keys_pressed[0]) *
-+ BITS_TO_LONGS(key_count), GFP_KERNEL);
-+ if (kp == NULL) {
-+ err = -ENOMEM;
-+ pr_err("gpiomatrix: Failed to allocate private data\n");
-+ goto err_kp_alloc_failed;
-+ }
-+ kp->input_dev = input_dev;
-+ kp->keypad_info = mi;
-+ set_bit(EV_KEY, input_dev->evbit);
-+ for (i = 0; i < key_count; i++) {
-+ if (mi->keymap[i])
-+ set_bit(mi->keymap[i] & KEY_MAX,
-+ input_dev->keybit);
-+ }
-+
-+ for (i = 0; i < mi->noutputs; i++) {
-+ if (gpio_cansleep(mi->output_gpios[i])) {
-+ pr_err("gpiomatrix: unsupported output gpio %d,"
-+ " can sleep\n", mi->output_gpios[i]);
-+ err = -EINVAL;
-+ goto err_request_output_gpio_failed;
-+ }
-+ err = gpio_request(mi->output_gpios[i], "gpio_kp_out");
-+ if (err) {
-+ pr_err("gpiomatrix: gpio_request failed for "
-+ "output %d\n", mi->output_gpios[i]);
-+ goto err_request_output_gpio_failed;
-+ }
-+ if (mi->flags & GPIOKPF_DRIVE_INACTIVE)
-+ err = gpio_direction_output(mi->output_gpios[i],
-+ !(mi->flags & GPIOKPF_ACTIVE_HIGH));
-+ else
-+ err = gpio_direction_input(mi->output_gpios[i]);
-+ if (err) {
-+ pr_err("gpiomatrix: gpio_configure failed for "
-+ "output %d\n", mi->output_gpios[i]);
-+ goto err_output_gpio_configure_failed;
-+ }
-+ }
-+ for (i = 0; i < mi->ninputs; i++) {
-+ err = gpio_request(mi->input_gpios[i], "gpio_kp_in");
-+ if (err) {
-+ pr_err("gpiomatrix: gpio_request failed for "
-+ "input %d\n", mi->input_gpios[i]);
-+ goto err_request_input_gpio_failed;
-+ }
-+ err = gpio_direction_input(mi->input_gpios[i]);
-+ if (err) {
-+ pr_err("gpiomatrix: gpio_direction_input failed"
-+ " for input %d\n", mi->input_gpios[i]);
-+ goto err_gpio_direction_input_failed;
-+ }
-+ }
-+ kp->current_output = mi->noutputs;
-+ kp->key_state_changed = 1;
-+
-+ hrtimer_init(&kp->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-+ kp->timer.function = gpio_keypad_timer_func;
-+ wake_lock_init(&kp->wake_lock, WAKE_LOCK_SUSPEND, "gpio_kp");
-+ err = gpio_keypad_request_irqs(kp);
-+ kp->use_irq = err == 0;
-+
-+ pr_info("GPIO Matrix Keypad Driver: Start keypad matrix for %s "
-+ "in %s mode\n", input_dev->name,
-+ kp->use_irq ? "interrupt" : "polling");
-+
-+ if (kp->use_irq)
-+ wake_lock(&kp->wake_lock);
-+ hrtimer_start(&kp->timer, ktime_set(0, 0), HRTIMER_MODE_REL);
-+
-+ return 0;
-+ }
-+
-+ err = 0;
-+ kp = *data;
-+
-+ if (kp->use_irq)
-+ for (i = mi->noutputs - 1; i >= 0; i--)
-+ free_irq(gpio_to_irq(mi->input_gpios[i]), kp);
-+
-+ hrtimer_cancel(&kp->timer);
-+ wake_lock_destroy(&kp->wake_lock);
-+ for (i = mi->noutputs - 1; i >= 0; i--) {
-+err_gpio_direction_input_failed:
-+ gpio_free(mi->input_gpios[i]);
-+err_request_input_gpio_failed:
-+ ;
-+ }
-+ for (i = mi->noutputs - 1; i >= 0; i--) {
-+err_output_gpio_configure_failed:
-+ gpio_free(mi->output_gpios[i]);
-+err_request_output_gpio_failed:
-+ ;
-+ }
-+ kfree(kp);
-+err_kp_alloc_failed:
-+err_invalid_platform_data:
-+ return err;
-+}
---- /dev/null
-+++ b/drivers/input/misc/gpio_output.c
-@@ -0,0 +1,84 @@
-+/* drivers/input/misc/gpio_output.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>
-+
-+int gpio_event_output_event(
-+ struct input_dev *input_dev, struct gpio_event_info *info, void **data,
-+ unsigned int type, unsigned int code, int value)
-+{
-+ int i;
-+ struct gpio_event_output_info *oi;
-+ oi = container_of(info, struct gpio_event_output_info, info);
-+ if (type != oi->type)
-+ return 0;
-+ if (!(oi->flags & GPIOEDF_ACTIVE_HIGH))
-+ value = !value;
-+ for (i = 0; i < oi->keymap_size; i++)
-+ if (code == oi->keymap[i].code)
-+ gpio_set_value(oi->keymap[i].gpio, value);
-+ return 0;
-+}
-+
-+int gpio_event_output_func(
-+ struct input_dev *input_dev, struct gpio_event_info *info, void **data,
-+ int func)
-+{
-+ int ret;
-+ int i;
-+ struct gpio_event_output_info *oi;
-+ oi = container_of(info, struct gpio_event_output_info, info);
-+
-+ if (func == GPIO_EVENT_FUNC_SUSPEND || func == GPIO_EVENT_FUNC_RESUME)
-+ return 0;
-+
-+ if (func == GPIO_EVENT_FUNC_INIT) {
-+ int output_level = !(oi->flags & GPIOEDF_ACTIVE_HIGH);
-+ for (i = 0; i < oi->keymap_size; i++)
-+ input_set_capability(input_dev, oi->type,
-+ oi->keymap[i].code);
-+
-+ for (i = 0; i < oi->keymap_size; i++) {
-+ ret = gpio_request(oi->keymap[i].gpio,
-+ "gpio_event_output");
-+ if (ret) {
-+ pr_err("gpio_event_output_func: gpio_request "
-+ "failed for %d\n", oi->keymap[i].gpio);
-+ goto err_gpio_request_failed;
-+ }
-+ ret = gpio_direction_output(oi->keymap[i].gpio,
-+ output_level);
-+ if (ret) {
-+ pr_err("gpio_event_output_func: "
-+ "gpio_direction_output failed for %d\n",
-+ oi->keymap[i].gpio);
-+ goto err_gpio_direction_output_failed;
-+ }
-+ }
-+ return 0;
-+ }
-+
-+ ret = 0;
-+ for (i = oi->keymap_size - 1; i >= 0; i--) {
-+err_gpio_direction_output_failed:
-+ gpio_free(oi->keymap[i].gpio);
-+err_gpio_request_failed:
-+ ;
-+ }
-+ return ret;
-+}
-+
---- /dev/null
-+++ b/include/linux/gpio_event.h
-@@ -0,0 +1,154 @@
-+/* include/linux/gpio_event.h
-+ *
-+ * 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.
-+ *
-+ */
-+
-+#ifndef _LINUX_GPIO_EVENT_H
-+#define _LINUX_GPIO_EVENT_H
-+
-+#include <linux/input.h>
-+
-+enum {
-+ GPIO_EVENT_FUNC_UNINIT = 0x0,
-+ GPIO_EVENT_FUNC_INIT = 0x1,
-+ GPIO_EVENT_FUNC_SUSPEND = 0x2,
-+ GPIO_EVENT_FUNC_RESUME = 0x3,
-+};
-+struct gpio_event_info {
-+ int (*func)(struct input_dev *input_dev,
-+ struct gpio_event_info *info,
-+ void **data, int func);
-+ int (*event)(struct input_dev *input_dev,
-+ struct gpio_event_info *info,
-+ void **data, unsigned int type,
-+ unsigned int code, int value); /* out events */
-+};
-+
-+struct gpio_event_platform_data {
-+ const char *name;
-+ struct gpio_event_info **info;
-+ size_t info_count;
-+ int (*power)(const struct gpio_event_platform_data *pdata, bool on);
-+};
-+
-+#define GPIO_EVENT_DEV_NAME "gpio-event"
-+
-+/* Key matrix */
-+
-+enum gpio_event_matrix_flags {
-+ /* unset: drive active output low, set: drive active output high */
-+ GPIOKPF_ACTIVE_HIGH = 1U << 0,
-+ GPIOKPF_DEBOUNCE = 1U << 1,
-+ GPIOKPF_REMOVE_SOME_PHANTOM_KEYS = 1U << 2,
-+ GPIOKPF_REMOVE_PHANTOM_KEYS = GPIOKPF_REMOVE_SOME_PHANTOM_KEYS |
-+ GPIOKPF_DEBOUNCE,
-+ GPIOKPF_DRIVE_INACTIVE = 1U << 3,
-+ GPIOKPF_LEVEL_TRIGGERED_IRQ = 1U << 4,
-+ GPIOKPF_PRINT_UNMAPPED_KEYS = 1U << 16,
-+ GPIOKPF_PRINT_MAPPED_KEYS = 1U << 17,
-+ GPIOKPF_PRINT_PHANTOM_KEYS = 1U << 18,
-+};
-+
-+extern int gpio_event_matrix_func(struct input_dev *input_dev,
-+ struct gpio_event_info *info, void **data, int func);
-+struct gpio_event_matrix_info {
-+ /* initialize to gpio_event_matrix_func */
-+ struct gpio_event_info info;
-+ /* size must be ninputs * noutputs */
-+ const unsigned short *keymap;
-+ unsigned int *input_gpios;
-+ unsigned int *output_gpios;
-+ unsigned int ninputs;
-+ unsigned int noutputs;
-+ /* time to wait before reading inputs after driving each output */
-+ ktime_t settle_time;
-+ /* time to wait before scanning the keypad a second time */
-+ ktime_t debounce_delay;
-+ ktime_t poll_time;
-+ unsigned flags;
-+};
-+
-+/* Directly connected inputs and outputs */
-+
-+enum gpio_event_direct_flags {
-+ GPIOEDF_ACTIVE_HIGH = 1U << 0,
-+/* GPIOEDF_USE_DOWN_IRQ = 1U << 1, */
-+/* GPIOEDF_USE_IRQ = (1U << 2) | GPIOIDF_USE_DOWN_IRQ, */
-+ GPIOEDF_PRINT_KEYS = 1U << 8,
-+ GPIOEDF_PRINT_KEY_DEBOUNCE = 1U << 9,
-+};
-+
-+struct gpio_event_direct_entry {
-+ uint32_t gpio:23;
-+ uint32_t code:9;
-+};
-+
-+/* inputs */
-+extern int gpio_event_input_func(struct input_dev *input_dev,
-+ struct gpio_event_info *info, void **data, int func);
-+struct gpio_event_input_info {
-+ /* initialize to gpio_event_input_func */
-+ struct gpio_event_info info;
-+ ktime_t debounce_time;
-+ ktime_t poll_time;
-+ uint16_t flags;
-+ uint16_t type;
-+ const struct gpio_event_direct_entry *keymap;
-+ size_t keymap_size;
-+};
-+
-+/* outputs */
-+extern int gpio_event_output_func(struct input_dev *input_dev,
-+ struct gpio_event_info *info, void **data, int func);
-+extern int gpio_event_output_event(struct input_dev *input_dev,
-+ struct gpio_event_info *info, void **data,
-+ unsigned int type, unsigned int code, int value);
-+struct gpio_event_output_info {
-+ /* initialize to gpio_event_output_func and gpio_event_output_event */
-+ struct gpio_event_info info;
-+ uint16_t flags;
-+ uint16_t type;
-+ const struct gpio_event_direct_entry *keymap;
-+ size_t keymap_size;
-+};
-+
-+
-+/* axes */
-+
-+enum gpio_event_axis_flags {
-+ GPIOEAF_PRINT_UNKNOWN_DIRECTION = 1U << 16,
-+ GPIOEAF_PRINT_RAW = 1U << 17,
-+ GPIOEAF_PRINT_EVENT = 1U << 18,
-+};
-+
-+extern int gpio_event_axis_func(struct input_dev *input_dev,
-+ struct gpio_event_info *info, void **data, int func);
-+struct gpio_event_axis_info {
-+ /* initialize to gpio_event_axis_func */
-+ struct gpio_event_info info;
-+ uint8_t count;
-+ uint8_t type; /* EV_REL or EV_ABS */
-+ uint16_t code;
-+ uint16_t decoded_size;
-+ uint16_t (*map)(struct gpio_event_axis_info *info, uint16_t in);
-+ uint32_t *gpio;
-+ uint32_t flags;
-+};
-+#define gpio_axis_2bit_gray_map gpio_axis_4bit_gray_map
-+#define gpio_axis_3bit_gray_map gpio_axis_4bit_gray_map
-+uint16_t gpio_axis_4bit_gray_map(
-+ struct gpio_event_axis_info *info, uint16_t in);
-+uint16_t gpio_axis_5bit_singletrack_map(
-+ struct gpio_event_axis_info *info, uint16_t in);
-+
-+#endif
projects / openwrt / staging / chunkeey.git / blobdiff