From patchwork Wed May 22 16:13:18 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Barry Song <21cnbao@gmail.com> X-Patchwork-Id: 2602461 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 225CBDF215 for ; Wed, 22 May 2013 16:13:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755417Ab3EVQN3 (ORCPT ); Wed, 22 May 2013 12:13:29 -0400 Received: from mail-pb0-f43.google.com ([209.85.160.43]:54954 "EHLO mail-pb0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751543Ab3EVQN2 (ORCPT ); Wed, 22 May 2013 12:13:28 -0400 Received: by mail-pb0-f43.google.com with SMTP id ma3so1878596pbc.16 for ; Wed, 22 May 2013 09:13:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer; bh=hcrICgx5KPGlhm+HWnOoJo4eig9LOvlhOdO8k2TuyZI=; b=VEpUP2tuKyknhNWwXjsufQC+q4VWCnkkecqIcHrhh4RX8XhQt1gbvdCUUhaVWFMdS1 Q9V4wY7QSRDIGYhk33DL+kfHbJeOXtdhWrMxy2vyksoKoZrOudlCXY/jPfB75pxqxmgo fvFszQOHls9aUtziMAKHQhyCcFXIr6tdFbC08c6v5QLqSy/hGQSxSSjLxpNrh4pmTTtZ aDBu2TP3QhEj0z7oPngerZ5VXy6rk7Po25yNdQhvriyJfrmEhCFd+l7AmofOd4oj/oYi tv+US0nj+1UUQKXJpd39zMVntBgNO3PTlNa6IjRRtcZeeSY6R0VxRYB7Ywl/217q1x4v vZAQ== X-Received: by 10.66.89.65 with SMTP id bm1mr8857439pab.179.1369239207884; Wed, 22 May 2013 09:13:27 -0700 (PDT) Received: from localhost.localdomain ([221.5.111.161]) by mx.google.com with ESMTPSA id fn9sm8703536pab.2.2013.05.22.09.13.23 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 22 May 2013 09:13:27 -0700 (PDT) From: Barry Song <21cnbao@gmail.com> To: dtor@mail.ru, dmitry.torokhov@gmail.com Cc: linux-input@vger.kernel.org, workgroup.linux@csr.com, linux-arm-kernel@lists.infradead.org, Binghua Duan , Xianglong Du , Barry Song Subject: [PATCH] input: sirfsoc_pwrc: add onkey input driver for CSR SiRFprimaII PWRC Date: Thu, 23 May 2013 00:13:18 +0800 Message-Id: <1369239198-11059-1-git-send-email-Baohua.Song@csr.com> X-Mailer: git-send-email 1.8.2.3 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Binghua Duan there is an embedded PWRC(power controller) in SiRFprimaII and SiRFatlasVI, we have an ONKEY button which can generate interrupt to IRQ controller. in a typical user scenarios, at the runtime, if users touch the key, we put system to s2ram status. Signed-off-by: Binghua Duan Signed-off-by: Xianglong Du Signed-off-by: Barry Song --- drivers/input/misc/Kconfig | 10 +++ drivers/input/misc/Makefile | 1 + drivers/input/misc/sirfsoc_onkey.c | 176 +++++++++++++++++++++++++++++++++++++ 3 files changed, 187 insertions(+) create mode 100644 drivers/input/misc/sirfsoc_onkey.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index bb698e1..1d91d1b 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -637,4 +637,14 @@ config INPUT_XEN_KBDDEV_FRONTEND To compile this driver as a module, choose M here: the module will be called xen-kbdfront. +config INPUT_SIRFSOC_ONKEY + bool "CSR SiRFSoC power on/off/suspend key support" + depends on ARCH_SIRF + default y + help + Say Y here if you want to support for the SiRFSoC power on/off/suspend key + in Linux, after you press the onkey, system will suspend. + + If unsure, say N. + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index d7fc17f..1d66f03 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -60,3 +60,4 @@ obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o obj-$(CONFIG_INPUT_YEALINK) += yealink.o +obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc_onkey.o diff --git a/drivers/input/misc/sirfsoc_onkey.c b/drivers/input/misc/sirfsoc_onkey.c new file mode 100644 index 0000000..3e48db9 --- /dev/null +++ b/drivers/input/misc/sirfsoc_onkey.c @@ -0,0 +1,176 @@ +/* + * Power key driver for SiRF PrimaII + * + * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct sirfsoc_pwrc_drvdata { + u32 pwrc_base; + int irq; + struct input_dev *input; +}; + +#define PWRC_ON_KEY_BIT (1 << 0) + +#define PWRC_INT_STATUS 0xc +#define PWRC_INT_MASK 0x10 + +static irqreturn_t sirfsoc_pwrc_isr(int irq, void *dev_id) +{ + struct sirfsoc_pwrc_drvdata *pwrcdrv = + (struct sirfsoc_pwrc_drvdata *)dev_id; + u32 int_status; + int_status = sirfsoc_rtc_iobrg_readl( + pwrcdrv->pwrc_base + PWRC_INT_STATUS); + sirfsoc_rtc_iobrg_writel(int_status & (~PWRC_ON_KEY_BIT), + pwrcdrv->pwrc_base + PWRC_INT_STATUS); + + /* + * For a typical Linux system, we report KEY_SUSPEND to trigger apm-power.c + * to queue a SUSPEND APM event + */ + input_event(pwrcdrv->input, EV_PWR, KEY_SUSPEND, 1); + input_sync(pwrcdrv->input); + + /* + * Todo: report KEY_POWER event for Android platforms, Android PowerManager + * will handle the suspend and powerdown/hibernation + */ + + return IRQ_HANDLED; +} + +static const struct of_device_id sirfsoc_pwrc_of_match[] = { + { .compatible = "sirf,prima2-pwrc" }, + {}, +} +MODULE_DEVICE_TABLE(of, sirfsoc_pwrc_of_match); + +static int sirfsoc_pwrc_probe(struct platform_device *pdev) +{ + int ret; + struct sirfsoc_pwrc_drvdata *pwrcdrv = NULL; + struct device_node *np = pdev->dev.of_node; + + pwrcdrv = devm_kzalloc(&pdev->dev, + sizeof(struct sirfsoc_pwrc_drvdata), GFP_KERNEL); + if (!pwrcdrv) { + dev_info(&pdev->dev, "kzalloc fail!\n"); + return -ENOMEM; + } + + /* + * we can't use of_iomap because pwrc is not mapped in memory, the so-called base + * address is only offset in rtciobrg + */ + ret = of_property_read_u32(np, "reg", &pwrcdrv->pwrc_base); + if (ret) { + dev_err(&pdev->dev, "unable to find base address of pwrc node in dtb\n"); + return ret; + } + + pwrcdrv->input = devm_input_allocate_device(&pdev->dev); + if (!pwrcdrv->input) + return -ENOMEM; + + pwrcdrv->input->name = "sirfsoc pwrckey"; + pwrcdrv->input->phys = "pwrc/input0"; + + platform_set_drvdata(pdev, pwrcdrv); + + pwrcdrv->irq = platform_get_irq(pdev, 0); + ret = devm_request_irq(&pdev->dev, pwrcdrv->irq, + sirfsoc_pwrc_isr, IRQF_SHARED, + "sirfsoc_pwrc_int", pwrcdrv); + + sirfsoc_rtc_iobrg_writel( + sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base + PWRC_INT_MASK) + | PWRC_ON_KEY_BIT, pwrcdrv->pwrc_base + PWRC_INT_MASK); + if (ret) { + dev_err(&pdev->dev, "pwrc: Unable to claim irq %d; error %d\n", + pwrcdrv->irq, ret); + return ret; + } + + pwrcdrv->input->evbit[0] = BIT_MASK(EV_PWR) | BIT_MASK(EV_KEY); + set_bit(KEY_POWER, pwrcdrv->input->keybit); + + ret = input_register_device(pwrcdrv->input); + if (ret) { + dev_err(&pdev->dev, + "pwrc: Unable to register input device,error: %d\n", + ret); + return ret; + } + + device_init_wakeup(&pdev->dev, 1); + + return 0; +} + +static int sirfsoc_pwrc_remove(struct platform_device *pdev) +{ + device_init_wakeup(&pdev->dev, 0); + + return 0; +} + +#ifdef CONFIG_PM +static int pwrc_suspend(struct device *dev) +{ + return 0; +} + +static int pwrc_resume(struct device *dev) +{ + struct sirfsoc_pwrc_drvdata *pwrcdrv = dev_get_drvdata(dev); + + /* + * Do not mask pwrc interrupt as we want pwrc work as a wakeup source + * if users touch X_ONKEY_B, see arch/arm/mach-prima2/pm.c + */ + sirfsoc_rtc_iobrg_writel( + sirfsoc_rtc_iobrg_readl( + pwrcdrv->pwrc_base + PWRC_INT_MASK) | PWRC_ON_KEY_BIT, + pwrcdrv->pwrc_base + PWRC_INT_MASK); + + return 0; +} + +static const struct dev_pm_ops sirfsoc_pwrc_pm_ops = { + .suspend = pwrc_suspend, + .resume = pwrc_resume, +}; +#endif + +static struct platform_driver sirfsoc_pwrc_driver = { + .probe = sirfsoc_pwrc_probe, + .remove = sirfsoc_pwrc_remove, + .driver = { + .name = "sirfsoc-pwrc", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &sirfsoc_pwrc_pm_ops, +#endif + .of_match_table = of_match_ptr(sirfsoc_pwrc_of_match), + } +}; + +module_platform_driver(sirfsoc_pwrc_driver); + +MODULE_LICENSE("GPLv2"); +MODULE_AUTHOR("Binghua Duan , " + "Xianglong Du "); +MODULE_DESCRIPTION("CSR Prima2 PWRC Driver"); +MODULE_ALIAS("platform:sirfsoc-pwrc");