diff options
Diffstat (limited to 'target/linux/goldfish/patches-2.6.30/0086-Input-Generic-GPIO-Input-device.patch')
| -rw-r--r-- | target/linux/goldfish/patches-2.6.30/0086-Input-Generic-GPIO-Input-device.patch | 1460 |
1 files changed, 0 insertions, 1460 deletions
diff --git a/target/linux/goldfish/patches-2.6.30/0086-Input-Generic-GPIO-Input-device.patch b/target/linux/goldfish/patches-2.6.30/0086-Input-Generic-GPIO-Input-device.patch deleted file mode 100644 index 1025633802..0000000000 --- a/target/linux/goldfish/patches-2.6.30/0086-Input-Generic-GPIO-Input-device.patch +++ /dev/null @@ -1,1460 +0,0 @@ -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 |