Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master

1 files changed, 413 insertions, 0 deletions

diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
new file mode 100644
index 000000000000..b227eb469f49
--- /dev/null
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -0,0 +1,413 @@
+/*
+ * Eee PC WMI hotkey driver
+ *
+ * Copyright(C) 2010 Intel Corporation.
+ *
+ * Portions based on wistron_btns.c:
+ * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
+ * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
+ * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
+ *
+ *  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
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/platform_device.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+#define EEEPC_WMI_FILE  "eeepc-wmi"
+
+MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
+MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
+MODULE_LICENSE("GPL");
+
+#define EEEPC_WMI_EVENT_GUID    "ABBC0F72-8EA1-11D1-00A0-C90629100000"
+#define EEEPC_WMI_MGMT_GUID     "97845ED0-4E6D-11DE-8A39-0800200C9A66"
+
+MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
+MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID);
+
+#define NOTIFY_BRNUP_MIN        0x11
+#define NOTIFY_BRNUP_MAX        0x1f
+#define NOTIFY_BRNDOWN_MIN      0x20
+#define NOTIFY_BRNDOWN_MAX      0x2e
+
+#define EEEPC_WMI_METHODID_DEVS 0x53564544
+#define EEEPC_WMI_METHODID_DSTS 0x53544344
+
+#define EEEPC_WMI_DEVID_BACKLIGHT       0x00050012
+
+static const struct key_entry eeepc_wmi_keymap[] = {
+        /* Sleep already handled via generic ACPI code */
+        { KE_KEY, 0x5d, { KEY_WLAN } },
+        { KE_KEY, 0x32, { KEY_MUTE } },
+        { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
+        { KE_KEY, 0x30, { KEY_VOLUMEUP } },
+        { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
+        { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
+        { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
+        { KE_END, 0},
+};
+
+struct bios_args {
+        u32     dev_id;
+        u32     ctrl_param;
+};
+
+struct eeepc_wmi {
+        struct input_dev *inputdev;
+        struct backlight_device *backlight_device;
+};
+
+static struct platform_device *platform_device;
+
+static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc)
+{
+        int err;
+
+        eeepc->inputdev = input_allocate_device();
+        if (!eeepc->inputdev)
+                return -ENOMEM;
+
+        eeepc->inputdev->name = "Eee PC WMI hotkeys";
+        eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0";
+        eeepc->inputdev->id.bustype = BUS_HOST;
+        eeepc->inputdev->dev.parent = &platform_device->dev;
+
+        err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL);
+        if (err)
+                goto err_free_dev;
+
+        err = input_register_device(eeepc->inputdev);
+        if (err)
+                goto err_free_keymap;
+
+        return 0;
+
+err_free_keymap:
+        sparse_keymap_free(eeepc->inputdev);
+err_free_dev:
+        input_free_device(eeepc->inputdev);
+        return err;
+}
+
+static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc)
+{
+        if (eeepc->inputdev) {
+                sparse_keymap_free(eeepc->inputdev);
+                input_unregister_device(eeepc->inputdev);
+        }
+
+        eeepc->inputdev = NULL;
+}
+
+static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *ctrl_param)
+{
+        struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id };
+        struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+        union acpi_object *obj;
+        acpi_status status;
+        u32 tmp;
+
+        status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
+                        1, EEEPC_WMI_METHODID_DSTS, &input, &output);
+
+        if (ACPI_FAILURE(status))
+                return status;
+
+        obj = (union acpi_object *)output.pointer;
+        if (obj && obj->type == ACPI_TYPE_INTEGER)
+                tmp = (u32)obj->integer.value;
+        else
+                tmp = 0;
+
+        if (ctrl_param)
+                *ctrl_param = tmp;
+
+        kfree(obj);
+
+        return status;
+
+}
+
+static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param)
+{
+        struct bios_args args = {
+                .dev_id = dev_id,
+                .ctrl_param = ctrl_param,
+        };
+        struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
+        acpi_status status;
+
+        status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
+                        1, EEEPC_WMI_METHODID_DEVS, &input, NULL);
+
+        return status;
+}
+
+static int read_brightness(struct backlight_device *bd)
+{
+        static u32 ctrl_param;
+        acpi_status status;
+
+        status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &ctrl_param);
+
+        if (ACPI_FAILURE(status))
+                return -1;
+        else
+                return ctrl_param & 0xFF;
+}
+
+static int update_bl_status(struct backlight_device *bd)
+{
+
+        static u32 ctrl_param;
+        acpi_status status;
+
+        ctrl_param = bd->props.brightness;
+
+        status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, ctrl_param);
+
+        if (ACPI_FAILURE(status))
+                return -1;
+        else
+                return 0;
+}
+
+static const struct backlight_ops eeepc_wmi_bl_ops = {
+        .get_brightness = read_brightness,
+        .update_status = update_bl_status,
+};
+
+static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code)
+{
+        struct backlight_device *bd = eeepc->backlight_device;
+        int old = bd->props.brightness;
+        int new;
+
+        if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
+                new = code - NOTIFY_BRNUP_MIN + 1;
+        else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
+                new = code - NOTIFY_BRNDOWN_MIN;
+
+        bd->props.brightness = new;
+        backlight_update_status(bd);
+        backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
+
+        return old;
+}
+
+static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc)
+{
+        struct backlight_device *bd;
+        struct backlight_properties props;
+
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = 15;
+        bd = backlight_device_register(EEEPC_WMI_FILE,
+                                       &platform_device->dev, eeepc,
+                                       &eeepc_wmi_bl_ops, &props);
+        if (IS_ERR(bd)) {
+                pr_err("Could not register backlight device\n");
+                return PTR_ERR(bd);
+        }
+
+        eeepc->backlight_device = bd;
+
+        bd->props.brightness = read_brightness(bd);
+        bd->props.power = FB_BLANK_UNBLANK;
+        backlight_update_status(bd);
+
+        return 0;
+}
+
+static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc)
+{
+        if (eeepc->backlight_device)
+                backlight_device_unregister(eeepc->backlight_device);
+
+        eeepc->backlight_device = NULL;
+}
+
+static void eeepc_wmi_notify(u32 value, void *context)
+{
+        struct eeepc_wmi *eeepc = context;
+        struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
+        union acpi_object *obj;
+        acpi_status status;
+        int code;
+        int orig_code;
+
+        status = wmi_get_event_data(value, &response);
+        if (status != AE_OK) {
+                pr_err("bad event status 0x%x\n", status);
+                return;
+        }
+
+        obj = (union acpi_object *)response.pointer;
+
+        if (obj && obj->type == ACPI_TYPE_INTEGER) {
+                code = obj->integer.value;
+                orig_code = code;
+
+                if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
+                        code = NOTIFY_BRNUP_MIN;
+                else if (code >= NOTIFY_BRNDOWN_MIN &&
+                         code <= NOTIFY_BRNDOWN_MAX)
+                        code = NOTIFY_BRNDOWN_MIN;
+
+                if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
+                        if (!acpi_video_backlight_support())
+                                eeepc_wmi_backlight_notify(eeepc, orig_code);
+                }
+
+                if (!sparse_keymap_report_event(eeepc->inputdev,
+                                                code, 1, true))
+                        pr_info("Unknown key %x pressed\n", code);
+        }
+
+        kfree(obj);
+}
+
+static int __devinit eeepc_wmi_platform_probe(struct platform_device *device)
+{
+        struct eeepc_wmi *eeepc;
+        int err;
+        acpi_status status;
+
+        eeepc = platform_get_drvdata(device);
+
+        err = eeepc_wmi_input_init(eeepc);
+        if (err)
+                goto error_input;
+
+        if (!acpi_video_backlight_support()) {
+                err = eeepc_wmi_backlight_init(eeepc);
+                if (err)
+                        goto error_backlight;
+        } else
+                pr_info("Backlight controlled by ACPI video driver\n");
+
+        status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
+                                        eeepc_wmi_notify, eeepc);
+        if (ACPI_FAILURE(status)) {
+                pr_err("Unable to register notify handler - %d\n",
+                        status);
+                err = -ENODEV;
+                goto error_wmi;
+        }
+
+        return 0;
+
+error_wmi:
+        eeepc_wmi_backlight_exit(eeepc);
+error_backlight:
+        eeepc_wmi_input_exit(eeepc);
+error_input:
+        return err;
+}
+
+static int __devexit eeepc_wmi_platform_remove(struct platform_device *device)
+{
+        struct eeepc_wmi *eeepc;
+
+        eeepc = platform_get_drvdata(device);
+        wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
+        eeepc_wmi_backlight_exit(eeepc);
+        eeepc_wmi_input_exit(eeepc);
+
+        return 0;
+}
+
+static struct platform_driver platform_driver = {
+        .driver = {
+                .name = EEEPC_WMI_FILE,
+                .owner = THIS_MODULE,
+        },
+        .probe = eeepc_wmi_platform_probe,
+        .remove = __devexit_p(eeepc_wmi_platform_remove),
+};
+
+static int __init eeepc_wmi_init(void)
+{
+        struct eeepc_wmi *eeepc;
+        int err;
+
+        if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) ||
+            !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) {
+                pr_warning("No known WMI GUID found\n");
+                return -ENODEV;
+        }
+
+        eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
+        if (!eeepc)
+                return -ENOMEM;
+
+        platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1);
+        if (!platform_device) {
+                pr_warning("Unable to allocate platform device\n");
+                err = -ENOMEM;
+                goto fail_platform;
+        }
+
+        err = platform_device_add(platform_device);
+        if (err) {
+                pr_warning("Unable to add platform device\n");
+                goto put_dev;
+        }
+
+        platform_set_drvdata(platform_device, eeepc);
+
+        err = platform_driver_register(&platform_driver);
+        if (err) {
+                pr_warning("Unable to register platform driver\n");
+                goto del_dev;
+        }
+
+        return 0;
+
+del_dev:
+        platform_device_del(platform_device);
+put_dev:
+        platform_device_put(platform_device);
+fail_platform:
+        kfree(eeepc);
+
+        return err;
+}
+
+static void __exit eeepc_wmi_exit(void)
+{
+        struct eeepc_wmi *eeepc;
+
+        eeepc = platform_get_drvdata(platform_device);
+        platform_driver_unregister(&platform_driver);
+        platform_device_unregister(platform_device);
+        kfree(eeepc);
+}
+
+module_init(eeepc_wmi_init);
+module_exit(eeepc_wmi_exit);