Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754675AbbL0NVz (ORCPT ); Sun, 27 Dec 2015 08:21:55 -0500 Received: from mail-yk0-f176.google.com ([209.85.160.176]:36161 "EHLO mail-yk0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752815AbbL0NVx convert rfc822-to-8bit (ORCPT ); Sun, 27 Dec 2015 08:21:53 -0500 MIME-Version: 1.0 In-Reply-To: <1451141797-1066-2-git-send-email-jprvita@endlessm.com> References: <1451141797-1066-1-git-send-email-jprvita@endlessm.com> <1451141797-1066-2-git-send-email-jprvita@endlessm.com> Date: Sun, 27 Dec 2015 15:21:52 +0200 Message-ID: Subject: Re: [PATCH 1/4] platform/x86: Add Asus Wireless Radio Control driver From: Andy Shevchenko To: =?UTF-8?Q?Jo=C3=A3o_Paulo_Rechi_Vita?= Cc: Darren Hart , Corentin Chary , platform-driver-x86@vger.kernel.org, acpi4asus-user@lists.sourceforge.net, "linux-kernel@vger.kernel.org" , =?UTF-8?Q?Jo=C3=A3o_Paulo_Rechi_Vita?= Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8135 Lines: 261 On Sat, Dec 26, 2015 at 4:56 PM, João Paulo Rechi Vita wrote: > Some Asus notebooks like the Asus E202SA and the Asus X555UB have a > separate ACPI device for notifications from the airplane mode hotkey. > This device is called "Wireless Radio Control" in Asus websites and ASHS > in the DSDT, and its ACPI _HID is ATK4002 in the two models mentioned > above. > > For these models, when the airplane mode hotkey (Fn+F2) is pressed, a > query 0x0B is started in the Embedded Controller, and all this query does > is a notify ASHS with the value 0x88 (for acpi_osi >= "Windows 2012"): > > Scope (_SB.PCI0.SBRG.EC0) > { > (...) > Method (_Q0B, 0, NotSerialized) // _Qxx: EC Query > { > If ((MSOS () >= OSW8)) > { > Notify (ASHS, 0x88) // Device-Specific > } > Else > { > (...) > } > } > } > > Signed-off-by: João Paulo Rechi Vita > --- > MAINTAINERS | 6 ++ > drivers/platform/x86/Kconfig | 15 +++++ > drivers/platform/x86/Makefile | 1 + > drivers/platform/x86/asus-wireless.c | 105 +++++++++++++++++++++++++++++++++++ > 4 files changed, 127 insertions(+) > create mode 100644 drivers/platform/x86/asus-wireless.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index c984136..e1860f2 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -1791,6 +1791,12 @@ S: Maintained > F: drivers/platform/x86/asus*.c > F: drivers/platform/x86/eeepc*.c > > +ASUS WIRELESS RADIO CONTROL DRIVER > +M: João Paulo Rechi Vita > +L: platform-driver-x86@vger.kernel.org > +S: Maintained > +F: drivers/platform/x86/asus-wireless.c > + > ASYNCHRONOUS TRANSFERS/TRANSFORMS (IOAT) API > R: Dan Williams > W: http://sourceforge.net/projects/xscaleiop > diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig > index d0bfcf8..d3a088b 100644 > --- a/drivers/platform/x86/Kconfig > +++ b/drivers/platform/x86/Kconfig > @@ -587,6 +587,21 @@ config EEEPC_WMI > If you have an ACPI-WMI compatible Eee PC laptop (>= 1000), say Y or M > here. > > +config ASUS_WIRELESS > + tristate "Asus Wireless Radio Control Driver" > + depends on ACPI > + depends on INPUT > + default m > + ---help--- > + The Asus Wireless Radio Control handles the airplane mode hotkey > + present on some Asus laptops. > + > + Say Y or M here if you have an ASUS notebook with an airplane mode > + hotkey. > + > + If you choose to compile this driver as a module the module will be > + called asus-wireless. > + > config ACPI_WMI > tristate "WMI" > depends on ACPI > diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile > index 4410e91..8b8df29 100644 > --- a/drivers/platform/x86/Makefile > +++ b/drivers/platform/x86/Makefile > @@ -5,6 +5,7 @@ > obj-$(CONFIG_ASUS_LAPTOP) += asus-laptop.o > obj-$(CONFIG_ASUS_WMI) += asus-wmi.o > obj-$(CONFIG_ASUS_NB_WMI) += asus-nb-wmi.o > +obj-$(CONFIG_ASUS_WIRELESS) += asus-wireless.o > obj-$(CONFIG_EEEPC_LAPTOP) += eeepc-laptop.o > obj-$(CONFIG_EEEPC_WMI) += eeepc-wmi.o > obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o > diff --git a/drivers/platform/x86/asus-wireless.c b/drivers/platform/x86/asus-wireless.c > new file mode 100644 > index 0000000..ef7dba5 > --- /dev/null > +++ b/drivers/platform/x86/asus-wireless.c > @@ -0,0 +1,105 @@ > +/* > + * Asus Wireless Radio Control Driver > + * > + * Copyright (C) 2015 Endless Mobile, Inc. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include Didn't notice exatcly how this one is used. > + > +#define ASUS_WIRELESS_MODULE_NAME "Asus Wireless Radio Control Driver" > + > +struct asus_wireless_data { > + struct input_dev *inputdev; > +}; > + > +static void asus_wireless_notify(struct acpi_device *device, u32 event) > +{ > + struct asus_wireless_data *data = acpi_driver_data(device); > + > + pr_debug("event=0x%X\n", event); dev_, please. > + if (event != 0x88) { > + pr_info("Unknown ASHS event: 0x%X\n", event); Ditto. Moreover, this is apparently not an info, I can put it either to debug or to warn depending how much those I produced in erroneous state. > + return; > + } > + input_report_key(data->inputdev, KEY_RFKILL, 1); > + input_report_key(data->inputdev, KEY_RFKILL, 0); > + input_sync(data->inputdev); > +} > + > +static int asus_wireless_add(struct acpi_device *device) > +{ > + struct asus_wireless_data *data; > + int err = -ENOMEM; > + > + pr_info(ASUS_WIRELESS_MODULE_NAME"\n"); Kinda useless, > + data = kzalloc(sizeof(*data), GFP_KERNEL); devm_kzalloc(); > + if (!data) > + return -ENOMEM; > + device->driver_data = data; > + > + data->inputdev = input_allocate_device(); Use devm_* > + if (!data->inputdev) > + goto fail; > + > + data->inputdev->name = "Asus Wireless Radio Control"; > + data->inputdev->phys = "asus-wireless/input0"; > + data->inputdev->id.bustype = BUS_HOST; > + data->inputdev->id.vendor = PCI_VENDOR_ID_ASUSTEK; > + data->inputdev->dev.parent = &device->dev; > + set_bit(EV_REP, data->inputdev->evbit); > + set_bit(KEY_RFKILL, data->inputdev->keybit); > + > + err = input_register_device(data->inputdev); > + if (err) > + goto fail; > + return 0; > + > +fail: > + device->driver->ops.remove(device); Better to show explicitly what you do here. Currently I might say it's a strange way I've ever seen to express the error path. > + return err; > +} > + > +static int asus_wireless_remove(struct acpi_device *device) > +{ > + struct asus_wireless_data *data = acpi_driver_data(device); > + > + pr_info("Removing "ASUS_WIRELESS_MODULE_NAME"\n"); Kinda useless. > + if (data->inputdev) How is it possible? > + input_unregister_device(data->inputdev); Redundant after switching to devm_ > + kfree(data); Ditto. > + return 0; > +} > + > +static const struct acpi_device_id device_ids[] = { > + {"ATK4002", 0}, > + {"", 0}, > +}; > +MODULE_DEVICE_TABLE(acpi, device_ids); > + > +static struct acpi_driver asus_wireless_driver = { > + .name = ASUS_WIRELESS_MODULE_NAME, > + .class = "hotkey", > + .ids = device_ids, > + .ops = { > + .add = asus_wireless_add, > + .remove = asus_wireless_remove, > + .notify = asus_wireless_notify, > + }, > +}; > +module_acpi_driver(asus_wireless_driver); > + > +MODULE_DESCRIPTION(ASUS_WIRELESS_MODULE_NAME); > +MODULE_AUTHOR("João Paulo Rechi Vita "); > +MODULE_LICENSE("GPL"); > -- > 2.5.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- With Best Regards, Andy Shevchenko -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/