From patchwork Tue Feb 1 13:47:40 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anirudh Ghayal X-Patchwork-Id: 522661 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p11Dncim014830 for ; Tue, 1 Feb 2011 13:49:39 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756938Ab1BANsj (ORCPT ); Tue, 1 Feb 2011 08:48:39 -0500 Received: from wolverine01.qualcomm.com ([199.106.114.254]:27629 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756929Ab1BANsh (ORCPT ); Tue, 1 Feb 2011 08:48:37 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6243"; a="72780264" Received: from pdmz-ns-mip.qualcomm.com (HELO mostmsg01.qualcomm.com) ([199.106.114.10]) by wolverine01.qualcomm.com with ESMTP/TLS/ADH-AES256-SHA; 01 Feb 2011 05:48:37 -0800 Received: from aghayal-linux.in.qualcomm.com (pdmz-snip-v218.qualcomm.com [192.168.218.1]) by mostmsg01.qualcomm.com (Postfix) with ESMTPA id 57AD210004D1; Tue, 1 Feb 2011 05:48:23 -0800 (PST) From: Anirudh Ghayal To: linux-kernel@vger.kernel.org Cc: linux-input@vger.kernel.org, rtc-linux@googlegroups.com, linux-arm-msm@vger.kernel.org, Trilok Soni , Dmitry Torokhov Subject: [RFC v2 PATCH 4/7] input: pmic8058_pwrkey: Add support for power key Date: Tue, 1 Feb 2011 19:17:40 +0530 Message-Id: <1296568063-12010-5-git-send-email-aghayal@codeaurora.org> X-Mailer: git-send-email 1.7.3.5 In-Reply-To: <1296568063-12010-1-git-send-email-aghayal@codeaurora.org> References: <1296568063-12010-1-git-send-email-aghayal@codeaurora.org> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 01 Feb 2011 13:49:39 +0000 (UTC) diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index b0c6772..d70a7be 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -330,6 +330,17 @@ config INPUT_PWM_BEEPER To compile this driver as a module, choose M here: the module will be called pwm-beeper. +config INPUT_PMIC8058_PWRKEY + tristate "PMIC8058 power key support" + depends on PMIC8058 + help + Say Y here if you want support for the PMIC8058 power key. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called pmic8058-pwrkey. + config INPUT_GPIO_ROTARY_ENCODER tristate "Rotary encoders connected to GPIO pins" depends on GPIOLIB && GENERIC_GPIO diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 9b47971..0348704 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_INPUT_PCF8574) += pcf8574_keypad.o obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o obj-$(CONFIG_INPUT_POWERMATE) += powermate.o obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o +obj-$(CONFIG_INPUT_PMIC8058_PWRKEY) += pmic8058-pwrkey.o obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o diff --git a/drivers/input/misc/pmic8058-pwrkey.c b/drivers/input/misc/pmic8058-pwrkey.c new file mode 100644 index 0000000..029483e --- /dev/null +++ b/drivers/input/misc/pmic8058-pwrkey.c @@ -0,0 +1,318 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define PON_CNTL_1 0x1C +#define PON_CNTL_PULL_UP BIT(7) +#define PON_CNTL_TRIG_DELAY_MASK (0x7) + +/** + * struct pmic8058_pwrkey - pmic8058 pwrkey information + * @key_press_irq: key press irq number + * @pm_chip: pmic8058 parent + * @timer: timer for end key simulation + * @key_pressed: flag to keep track for power key reporting + * @pdata: platform data + * @lock: protect key press update and end key simulation + */ +struct pmic8058_pwrkey { + struct input_dev *pwr; + int key_press_irq; + struct pm8058_chip *pm_chip; + struct timer_list timer; + bool key_pressed; + const struct pmic8058_pwrkey_pdata *pdata; + spinlock_t lock; +}; + +static void pmic8058_pwrkey_timer(unsigned long handle) +{ + unsigned long flags; + struct pmic8058_pwrkey *pwrkey = (struct pmic8058_pwrkey *)handle; + + spin_lock_irqsave(&pwrkey->lock, flags); + pwrkey->key_pressed = true; + + input_report_key(pwrkey->pwr, KEY_POWER, 1); + input_sync(pwrkey->pwr); + spin_unlock_irqrestore(&pwrkey->lock, flags); +} + +static irqreturn_t pwrkey_press_irq(int irq, void *_pwrkey) +{ + struct pmic8058_pwrkey *pwrkey = _pwrkey; + const struct pmic8058_pwrkey_pdata *pdata = pwrkey->pdata; + unsigned long flags; + + /* no pwrkey time duration, means no end key simulation */ + if (!pwrkey->pdata->pwrkey_time_ms) { + input_report_key(pwrkey->pwr, KEY_POWER, 1); + input_sync(pwrkey->pwr); + return IRQ_HANDLED; + } + + spin_lock_irqsave(&pwrkey->lock, flags); + + input_report_key(pwrkey->pwr, KEY_SCROLLLOCK, 1); + input_sync(pwrkey->pwr); + + mod_timer(&pwrkey->timer, jiffies + + msecs_to_jiffies(pdata->pwrkey_time_ms)); + spin_unlock_irqrestore(&pwrkey->lock, flags); + + return IRQ_HANDLED; +} + +static irqreturn_t pwrkey_release_irq(int irq, void *_pwrkey) +{ + struct pmic8058_pwrkey *pwrkey = _pwrkey; + unsigned long flags; + + /* no pwrkey time, means no delay in pwr key reporting */ + if (!pwrkey->pdata->pwrkey_time_ms) { + input_report_key(pwrkey->pwr, KEY_POWER, 0); + input_sync(pwrkey->pwr); + return IRQ_HANDLED; + } + + spin_lock_irqsave(&pwrkey->lock, flags); + del_timer_sync(&pwrkey->timer); + + if (pwrkey->key_pressed) { + pwrkey->key_pressed = false; + input_report_key(pwrkey->pwr, KEY_POWER, 0); + input_sync(pwrkey->pwr); + } + + input_report_key(pwrkey->pwr, KEY_SCREENLOCK, 0); + input_sync(pwrkey->pwr); + + spin_unlock_irqrestore(&pwrkey->lock, flags); + + return IRQ_HANDLED; +} + +#ifdef CONFIG_PM +static int pmic8058_pwrkey_suspend(struct device *dev) +{ + struct pmic8058_pwrkey *pwrkey = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(pwrkey->key_press_irq); + + return 0; +} + +static int pmic8058_pwrkey_resume(struct device *dev) +{ + struct pmic8058_pwrkey *pwrkey = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(pwrkey->key_press_irq); + + return 0; +} + +static const struct dev_pm_ops pm8058_pwr_key_pm_ops = { + .suspend = pmic8058_pwrkey_suspend, + .resume = pmic8058_pwrkey_resume, +}; +#endif + +static int __devinit pmic8058_pwrkey_probe(struct platform_device *pdev) +{ + struct input_dev *pwr; + int key_release_irq = platform_get_irq(pdev, 0); + int key_press_irq = platform_get_irq(pdev, 1); + int err; + unsigned int delay; + u8 pon_cntl; + struct pmic8058_pwrkey *pwrkey; + struct pmic8058_pwrkey_pdata *pdata = pdev->dev.platform_data; + struct pm8058_chip *pm_chip; + + pm_chip = platform_get_drvdata(pdev); + if (pm_chip == NULL) { + dev_err(&pdev->dev, "no parent data passed in\n"); + return -EINVAL; + } + + if (!pdata) { + dev_err(&pdev->dev, "power key platform data not supplied\n"); + return -EINVAL; + } + + if (pdata->kpd_trigger_delay_us > 62500) { + dev_err(&pdev->dev, "invalid pwr key trigger delay\n"); + return -EINVAL; + } + + if (pdata->pwrkey_time_ms && + (pdata->pwrkey_time_ms < 500 || pdata->pwrkey_time_ms > 1000)) { + dev_err(&pdev->dev, "invalid pwr key time supplied\n"); + return -EINVAL; + } + + pwrkey = kzalloc(sizeof(*pwrkey), GFP_KERNEL); + if (!pwrkey) + return -ENOMEM; + + pwrkey->pm_chip = pm_chip; + pwrkey->pdata = pdata; + + pwr = input_allocate_device(); + if (!pwr) { + dev_dbg(&pdev->dev, "Can't allocate power button\n"); + err = -ENOMEM; + goto free_pwrkey; + } + + input_set_capability(pwr, EV_KEY, KEY_POWER); + input_set_capability(pwr, EV_KEY, KEY_SCROLLLOCK); + + pwr->name = "pmic8058_pwrkey"; + pwr->phys = "pmic8058_pwrkey/input0"; + pwr->dev.parent = &pdev->dev; + + delay = (pdata->kpd_trigger_delay_us << 10) / USEC_PER_SEC; + delay = 1 + ilog2(delay); + + err = pm8058_read(pwrkey->pm_chip, PON_CNTL_1, &pon_cntl, 1); + if (err < 0) { + dev_err(&pdev->dev, "failed reading PON_CNTL_1 err=%d\n", err); + goto free_input_dev; + } + + + pon_cntl &= ~PON_CNTL_TRIG_DELAY_MASK; + pon_cntl |= (delay & PON_CNTL_TRIG_DELAY_MASK); + pon_cntl |= (pdata->pull_up ? PON_CNTL_PULL_UP : ~PON_CNTL_PULL_UP); + err = pm8058_write(pwrkey->pm_chip, PON_CNTL_1, &pon_cntl, 1); + if (err < 0) { + dev_err(&pdev->dev, "failed writing PON_CNTL_1 err=%d\n", err); + goto free_input_dev; + } + + setup_timer(&pwrkey->timer, pmic8058_pwrkey_timer, + (unsigned long) pwrkey); + + spin_lock_init(&pwrkey->lock); + + err = input_register_device(pwr); + if (err) { + dev_dbg(&pdev->dev, "Can't register power key: %d\n", err); + goto free_input_dev; + } + + pwrkey->key_press_irq = key_press_irq; + pwrkey->pwr = pwr; + + platform_set_drvdata(pdev, pwrkey); + + err = request_any_context_irq(key_press_irq, pwrkey_press_irq, + IRQF_TRIGGER_RISING, "pmic8058_pwrkey_press", pwrkey); + if (err < 0) { + dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n", + key_press_irq, err); + goto unreg_input_dev; + } + + err = request_any_context_irq(key_release_irq, pwrkey_release_irq, + IRQF_TRIGGER_RISING, "pmic8058_pwrkey_release", + pwrkey); + if (err < 0) { + dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n", + key_release_irq, err); + + goto free_press_irq; + } + + device_init_wakeup(&pdev->dev, pdata->wakeup); + + return 0; + +free_press_irq: + free_irq(key_press_irq, NULL); +unreg_input_dev: + input_unregister_device(pwr); + pwr = NULL; +free_input_dev: + input_free_device(pwr); +free_pwrkey: + kfree(pwrkey); + return err; +} + +static int __devexit pmic8058_pwrkey_remove(struct platform_device *pdev) +{ + struct pmic8058_pwrkey *pwrkey = platform_get_drvdata(pdev); + int key_release_irq = platform_get_irq(pdev, 0); + int key_press_irq = platform_get_irq(pdev, 1); + + device_init_wakeup(&pdev->dev, 0); + + free_irq(key_press_irq, pwrkey); + free_irq(key_release_irq, pwrkey); + del_timer_sync(&pwrkey->timer); + input_unregister_device(pwrkey->pwr); + kfree(pwrkey); + + return 0; +} + +static struct platform_driver pmic8058_pwrkey_driver = { + .probe = pmic8058_pwrkey_probe, + .remove = __devexit_p(pmic8058_pwrkey_remove), + .driver = { + .name = "pm8058-pwrkey", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &pm8058_pwr_key_pm_ops, +#endif + }, +}; + +static int __init pmic8058_pwrkey_init(void) +{ + return platform_driver_register(&pmic8058_pwrkey_driver); +} +module_init(pmic8058_pwrkey_init); + +static void __exit pmic8058_pwrkey_exit(void) +{ + platform_driver_unregister(&pmic8058_pwrkey_driver); +} +module_exit(pmic8058_pwrkey_exit); + +MODULE_ALIAS("platform:pmic8058_pwrkey"); +MODULE_DESCRIPTION("PMIC8058 Power Key driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Trilok Soni "); diff --git a/include/linux/input/pmic8058-pwrkey.h b/include/linux/input/pmic8058-pwrkey.h new file mode 100644 index 0000000..e41c616 --- /dev/null +++ b/include/linux/input/pmic8058-pwrkey.h @@ -0,0 +1,37 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef __PMIC8058_PWRKEY_H__ +#define __PMIC8058_PWRKEY_H__ +/** + * struct pmic8058_pwrkey_pdata - platform data for pwrkey driver + * @pull up: power on register control for pull up/down configuration + * @pwrkey_time_ms: time after which power key event should be generated, if + * key is released before then end key is reported. + * Supply zero for only power key reporting. + * @kpd_trigger_delay_us: time delay for power key state change interrupt + * trigger. + * @wakeup: configure power key as wakeup source + */ +struct pmic8058_pwrkey_pdata { + bool pull_up; + u16 pwrkey_time_ms; + u32 kpd_trigger_delay_us; + u32 wakeup; +}; + +#endif /* __PMIC8058_PWRKEY_H__ */