From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Subject: [PATCH 1/3] platform: x86: dell-rbtn: Dell Airplane Mode Switch driver Date: Sun, 23 Nov 2014 16:09:19 +0100 Message-ID: <1416755361-17357-2-git-send-email-pali.rohar@gmail.com> References: <1416755361-17357-1-git-send-email-pali.rohar@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <1416755361-17357-1-git-send-email-pali.rohar@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Matthew Garrett , Darren Hart Cc: platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, Gabriele Mazzotta , Alex Hung , =?UTF-8?q?Pali=20Roh=C3=A1r?= List-Id: platform-driver-x86.vger.kernel.org This is an ACPI driver for Dell laptops which receive HW switch events. It exports rfkill device dell-rbtn which provide correct hard rfkill st= ate. It does not provide support for setting soft rfkill state yet. Signed-off-by: Pali Roh=C3=A1r --- drivers/platform/x86/Kconfig | 13 +++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/dell-rbtn.c | 179 ++++++++++++++++++++++++++++++= ++++++++ 3 files changed, 193 insertions(+) create mode 100644 drivers/platform/x86/dell-rbtn.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfi= g index 4dcfb71..5a2ba64 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -137,6 +137,19 @@ config DELL_SMO8800 To compile this driver as a module, choose M here: the module will be called dell-smo8800. =20 +config DELL_RBTN + tristate "Dell Airplane Mode Switch driver" + depends on ACPI + depends on RFKILL + ---help--- + Say Y here if you want to support Dell Airplane Mode Switch ACPI + device on Dell laptops. Sometimes it has names: DELLABCE or DELRBTN= =2E + This driver register rfkill device and receives HW rfkill events + (when wifi/bluetooth was enabled) and set correct hard rfkill state= =2E + + To compile this driver as a module, choose M here: the module will + be called dell-rbtn. + =20 config FUJITSU_LAPTOP tristate "Fujitsu Laptop Extras" diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makef= ile index f82232b..b3e54ed 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_DELL_LAPTOP) +=3D dell-laptop.o obj-$(CONFIG_DELL_WMI) +=3D dell-wmi.o obj-$(CONFIG_DELL_WMI_AIO) +=3D dell-wmi-aio.o obj-$(CONFIG_DELL_SMO8800) +=3D dell-smo8800.o +obj-$(CONFIG_DELL_RBTN) +=3D dell-rbtn.o obj-$(CONFIG_ACER_WMI) +=3D acer-wmi.o obj-$(CONFIG_ACERHDF) +=3D acerhdf.o obj-$(CONFIG_HP_ACCEL) +=3D hp_accel.o diff --git a/drivers/platform/x86/dell-rbtn.c b/drivers/platform/x86/de= ll-rbtn.c new file mode 100644 index 0000000..f1f039a --- /dev/null +++ b/drivers/platform/x86/dell-rbtn.c @@ -0,0 +1,179 @@ +/* + Dell Airplane Mode Switch driver + Copyright (C) 2014 Pali Roh=C3=A1r + + This program is free software; you can redistribute it and/or modi= fy + it under the terms of the GNU General Public License as published = by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + 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 +#include +#include + +/*** helper functions ***/ + +static int rbtn_check(struct acpi_device *device) +{ + acpi_status status; + unsigned long long output; + + status =3D acpi_evaluate_integer(device->handle, "CRBT", NULL, &outpu= t); + if (ACPI_FAILURE(status)) + return -EINVAL; + + if (output > 3) + return -EINVAL; + + return 0; +} + + +/*** rfkill ops ***/ + +static void rbtn_query(struct rfkill *rfkill, void *data) +{ + struct acpi_device *device =3D data; + acpi_status status; + unsigned long long output; + + status =3D acpi_evaluate_integer(device->handle, "GRBT", NULL, &outpu= t); + if (ACPI_FAILURE(status)) + return; + + rfkill_set_states(rfkill, !output, !output); +} + +static int rbtn_set_block(void *data, bool blocked) +{ + /* FIXME: setting soft rfkill cause problems, so disable it for now *= / + return -EINVAL; +} + +struct rfkill_ops rbtn_ops =3D { + .query =3D rbtn_query, + .set_block =3D rbtn_set_block, +}; + + +/*** acpi driver ***/ + +static int rbtn_add(struct acpi_device *device); +static int rbtn_remove(struct acpi_device *device); +static void rbtn_notify(struct acpi_device *device, u32 event); + +static const struct acpi_device_id rbtn_ids[] =3D { + { "DELRBTN", 0 }, + { "DELLABCE", 0 }, + { "", 0 }, +}; + +static struct acpi_driver rbtn_driver =3D { + .name =3D "dell-rbtn", + .ids =3D rbtn_ids, + .ops =3D { + .add =3D rbtn_add, + .remove =3D rbtn_remove, + .notify =3D rbtn_notify, + }, + .owner =3D THIS_MODULE, +}; + + +/*** rfkill enable/disable ***/ + +static int rbtn_enable(struct acpi_device *device) +{ + struct rfkill *rfkill =3D device->driver_data; + int ret; + + if (rfkill) + return 0; + + /* NOTE: rbtn controls all radio devices, not only WLAN + but rfkill interface does not support "ANY" type + so "WLAN" type is used + */ + rfkill =3D rfkill_alloc("dell-rbtn", &device->dev, RFKILL_TYPE_WLAN, + &rbtn_ops, device); + if (!rfkill) + return -ENOMEM; + + ret =3D rfkill_register(rfkill); + if (ret) { + rfkill_destroy(rfkill); + return ret; + } + + device->driver_data =3D rfkill; + return 0; +} + +static void rbtn_disable(struct acpi_device *device) +{ + struct rfkill *rfkill =3D device->driver_data; + + if (!rfkill) + return; + + rfkill_unregister(rfkill); + rfkill_destroy(rfkill); + device->driver_data =3D NULL; +} + + +/*** acpi driver functions ***/ + +static int rbtn_add(struct acpi_device *device) +{ + int ret; + + ret =3D rbtn_check(device); + if (ret < 0) + return ret; + + return rbtn_enable(device); +} + +static int rbtn_remove(struct acpi_device *device) +{ + rbtn_disable(device); + return 0; +} + +static void rbtn_notify(struct acpi_device *device, u32 event) +{ + struct rfkill *rfkill =3D device->driver_data; + + if (event =3D=3D 0x80) + rbtn_query(rfkill, device); + else + dev_info(&device->dev, "Received unknown event (0x%x)\n", event); +} + + +/*** module functions ***/ + +static int __init rbtn_init(void) +{ + return acpi_bus_register_driver(&rbtn_driver); +} + +static void __exit rbtn_exit(void) +{ + acpi_bus_unregister_driver(&rbtn_driver); +} + +module_init(rbtn_init); +module_exit(rbtn_exit); + +MODULE_DEVICE_TABLE(acpi, rbtn_ids); +MODULE_DESCRIPTION("Dell Airplane Mode Switch driver"); +MODULE_AUTHOR("Pali Roh=C3=A1r "); +MODULE_LICENSE("GPL"); --=20 1.7.9.5