[PATCH 2/3] UBUNTU: SAUCE: Add WMI hotkeys support for Dell All-In-One series
Eric Miao
eric.miao at canonical.com
Sun Nov 21 12:31:07 UTC 2010
On Sat, Nov 20, 2010 at 3:16 AM, Colin King <colin.king at canonical.com> wrote:
> From: Colin Ian King <colin.king at canonical.com>
>
> Enable WMI hotkeys on event GUID 284A0E6B-380E-472A-921F-E52786257FB4. This driver
> enables the volume up and down keys.
>
> BugLink: http://bugs.launchpad.net/bugs/676997
>
> Signed-off-by: Eric Miao <eric.miao at canonical.com>
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
Looks good. Acked.
> ---
> drivers/platform/x86/Kconfig | 12 ++
> drivers/platform/x86/Makefile | 1 +
> drivers/platform/x86/dell-wmi-aio.c | 221 +++++++++++++++++++++++++++++++++++
> 3 files changed, 234 insertions(+), 0 deletions(-)
> create mode 100644 drivers/platform/x86/dell-wmi-aio.c
>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 3c02cf2..7730b4d 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -97,6 +97,18 @@ config DELL_WMI
> To compile this driver as a module, choose M here: the module will
> be called dell-wmi.
>
> +config DELL_WMI_AIO
> + tristate "WMI Hotkeys for Dell All-In-One series"
> + depends on ACPI_WMI
> + depends on INPUT
> + ---help---
> + Say Y here if you want to support WMI-based hotkeys on Dell
> + All-In-One machines.
> +
> + To compile this driver as a module, choose M here: the module will
> + be called dell-wmi.
> +
> +
> config FUJITSU_LAPTOP
> tristate "Fujitsu Laptop Extras"
> depends on ACPI
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index 7318fc2..590a8ba 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -10,6 +10,7 @@ obj-$(CONFIG_ACPI_CMPC) += classmate-laptop.o
> obj-$(CONFIG_COMPAL_LAPTOP) += compal-laptop.o
> obj-$(CONFIG_DELL_LAPTOP) += dell-laptop.o
> obj-$(CONFIG_DELL_WMI) += dell-wmi.o
> +obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o
> obj-$(CONFIG_ACER_WMI) += acer-wmi.o
> obj-$(CONFIG_ACERHDF) += acerhdf.o
> obj-$(CONFIG_HP_WMI) += hp-wmi.o
> diff --git a/drivers/platform/x86/dell-wmi-aio.c b/drivers/platform/x86/dell-wmi-aio.c
> new file mode 100644
> index 0000000..5e2bc18
> --- /dev/null
> +++ b/drivers/platform/x86/dell-wmi-aio.c
> @@ -0,0 +1,221 @@
> +/*
> + * WMI hotkeys support for Dell All-In-One series
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * 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.
> + *
> + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/types.h>
> +#include <linux/input.h>
> +#include <acpi/acpi_drivers.h>
> +#include <linux/acpi.h>
> +#include <linux/string.h>
> +
> +#define AIO_PREFIX "dell-wmi-aio: "
> +
> +MODULE_DESCRIPTION("WMI hotkeys driver for Dell All-In-One series");
> +MODULE_LICENSE("GPL");
> +
> +#define EVENT_GUID "284A0E6B-380E-472A-921F-E52786257FB4"
> +
> +MODULE_ALIAS("wmi:"EVENT_GUID);
> +
> +/* Temporary workaround until the WMI sysfs interface goes in.
> + Borrowed from acer-wmi */
> +MODULE_ALIAS("dmi:*:*Dell*:*:");
> +
> +struct key_entry {
> + char type; /* See KE_* below */
> + u16 code;
> + u16 keycode;
> +};
> +
> +enum { KE_KEY, KE_SW, KE_IGNORE, KE_END };
> +
> +/*
> + * Certain keys are flagged as KE_IGNORE. All of these are either
> + * notifications (rather than requests for change) or are also sent
> + * via the keyboard controller so should not be sent again.
> + */
> +
> +static struct key_entry dell_wmi_aio_keymap[] = {
> + { KE_KEY, 0xc0, KEY_VOLUMEUP },
> + { KE_KEY, 0xc1, KEY_VOLUMEDOWN },
> + { KE_END, 0 }
> +};
> +
> +static struct input_dev *dell_wmi_aio_input_dev;
> +
> +static struct key_entry *dell_wmi_aio_get_entry_by_scancode(int code)
> +{
> + struct key_entry *key;
> +
> + for (key = dell_wmi_aio_keymap; key->type != KE_END; key++)
> + if (code == key->code)
> + return key;
> +
> + return NULL;
> +}
> +
> +static struct key_entry *dell_wmi_aio_get_entry_by_keycode(int keycode)
> +{
> + struct key_entry *key;
> +
> + for (key = dell_wmi_aio_keymap; key->type != KE_END; key++)
> + if (key->type == KE_KEY && keycode == key->keycode)
> + return key;
> +
> + return NULL;
> +}
> +
> +static int dell_wmi_aio_getkeycode(struct input_dev *dev, int scancode,
> + int *keycode)
> +{
> + struct key_entry *key = dell_wmi_aio_get_entry_by_scancode(scancode);
> +
> + if (key && key->type == KE_KEY) {
> + *keycode = key->keycode;
> + return 0;
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int dell_wmi_aio_setkeycode(struct input_dev *dev, int scancode, int keycode)
> +{
> + struct key_entry *key;
> + int old_keycode;
> +
> + if (keycode < 0 || keycode > KEY_MAX)
> + return -EINVAL;
> +
> + key = dell_wmi_aio_get_entry_by_scancode(scancode);
> + if (key && key->type == KE_KEY) {
> + old_keycode = key->keycode;
> + key->keycode = keycode;
> + set_bit(keycode, dev->keybit);
> + if (!dell_wmi_aio_get_entry_by_keycode(old_keycode))
> + clear_bit(old_keycode, dev->keybit);
> + return 0;
> + }
> + return -EINVAL;
> +}
> +
> +static void dell_wmi_aio_notify(u32 value, void *context)
> +{
> + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
> + static struct key_entry *key;
> + union acpi_object *obj;
> + acpi_status status;
> +
> + status = wmi_get_event_data(value, &response);
> + if (status != AE_OK) {
> + pr_info(AIO_PREFIX "bad event status 0x%x\n", status);
> + return;
> + }
> +
> + obj = (union acpi_object *)response.pointer;
> +
> + if (obj && obj->type == ACPI_TYPE_INTEGER) {
> + int scancode = obj->integer.value;
> +
> + key = dell_wmi_aio_get_entry_by_scancode(scancode);
> + if (key) {
> + input_report_key(dell_wmi_aio_input_dev, key->keycode, 1);
> + input_sync(dell_wmi_aio_input_dev);
> + input_report_key(dell_wmi_aio_input_dev, key->keycode, 0);
> + input_sync(dell_wmi_aio_input_dev);
> + } else if (scancode)
> + pr_info(AIO_PREFIX "Unknown key %x pressed\n", scancode);
> + }
> + kfree(obj);
> +}
> +
> +static int __init dell_wmi_aio_input_setup(void)
> +{
> + struct key_entry *key;
> + int err;
> +
> + dell_wmi_aio_input_dev = input_allocate_device();
> +
> + if (!dell_wmi_aio_input_dev)
> + return -ENOMEM;
> +
> + dell_wmi_aio_input_dev->name = "Dell AIO WMI hotkeys";
> + dell_wmi_aio_input_dev->phys = "wmi/input0";
> + dell_wmi_aio_input_dev->id.bustype = BUS_HOST;
> + dell_wmi_aio_input_dev->getkeycode = dell_wmi_aio_getkeycode;
> + dell_wmi_aio_input_dev->setkeycode = dell_wmi_aio_setkeycode;
> +
> + for (key = dell_wmi_aio_keymap; key->type != KE_END; key++) {
> + switch (key->type) {
> + case KE_KEY:
> + set_bit(EV_KEY, dell_wmi_aio_input_dev->evbit);
> + set_bit(key->keycode, dell_wmi_aio_input_dev->keybit);
> + break;
> + case KE_SW:
> + set_bit(EV_SW, dell_wmi_aio_input_dev->evbit);
> + set_bit(key->keycode, dell_wmi_aio_input_dev->swbit);
> + break;
> + }
> + }
> +
> + err = input_register_device(dell_wmi_aio_input_dev);
> +
> + if (err) {
> + input_free_device(dell_wmi_aio_input_dev);
> + return err;
> + }
> +
> + return 0;
> +}
> +
> +static int __init dell_wmi_aio_init(void)
> +{
> + int err;
> +
> + if (wmi_has_guid(EVENT_GUID)) {
> + err = dell_wmi_aio_input_setup();
> +
> + if (err)
> + return err;
> +
> + err = wmi_install_notify_handler(EVENT_GUID,
> + dell_wmi_aio_notify, NULL);
> + if (err) {
> + input_unregister_device(dell_wmi_aio_input_dev);
> + pr_err(AIO_PREFIX "Unable to register"
> + " notify handler - %d\n", err);
> + return err;
> + }
> +
> + } else
> + pr_warning(AIO_PREFIX "No known WMI GUID found\n");
> +
> + return 0;
> +}
> +
> +static void __exit dell_wmi_aio_exit(void)
> +{
> + if (wmi_has_guid(EVENT_GUID)) {
> + wmi_remove_notify_handler(EVENT_GUID);
> + input_unregister_device(dell_wmi_aio_input_dev);
> + }
> +}
> +
> +module_init(dell_wmi_aio_init);
> +module_exit(dell_wmi_aio_exit);
> --
> 1.7.0.4
>
>
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