* 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_END, 0},
};
-static struct input_dev *eeepc_wmi_input_dev;
+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("EEEPC WMI: bad event status 0x%x\n", status);
+ pr_err("bad event status 0x%x\n", status);
return;
}
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)
+ else if (code >= NOTIFY_BRNDOWN_MIN &&
+ code <= NOTIFY_BRNDOWN_MAX)
code = NOTIFY_BRNDOWN_MIN;
- if (!sparse_keymap_report_event(eeepc_wmi_input_dev,
+ 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("EEEPC WMI: Unknown key %x pressed\n", code);
+ pr_info("Unknown key %x pressed\n", code);
}
kfree(obj);
}
-static int eeepc_wmi_input_setup(void)
+static int __devinit eeepc_wmi_platform_probe(struct platform_device *device)
{
+ struct eeepc_wmi *eeepc;
int err;
+ acpi_status status;
- eeepc_wmi_input_dev = input_allocate_device();
- if (!eeepc_wmi_input_dev)
- return -ENOMEM;
-
- eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys";
- eeepc_wmi_input_dev->phys = "wmi/input0";
- eeepc_wmi_input_dev->id.bustype = BUS_HOST;
+ eeepc = platform_get_drvdata(device);
- err = sparse_keymap_setup(eeepc_wmi_input_dev, eeepc_wmi_keymap, NULL);
+ err = eeepc_wmi_input_init(eeepc);
if (err)
- goto err_free_dev;
+ goto error_input;
- err = input_register_device(eeepc_wmi_input_dev);
- if (err)
- goto err_free_keymap;
+ 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;
-err_free_keymap:
- sparse_keymap_free(eeepc_wmi_input_dev);
-err_free_dev:
- input_free_device(eeepc_wmi_input_dev);
+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;
- acpi_status status;
- if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
- pr_warning("EEEPC WMI: No known WMI GUID found\n");
+ 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;
}
- err = eeepc_wmi_input_setup();
- if (err)
- return err;
+ eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
+ if (!eeepc)
+ return -ENOMEM;
- status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
- eeepc_wmi_notify, NULL);
- if (ACPI_FAILURE(status)) {
- sparse_keymap_free(eeepc_wmi_input_dev);
- input_unregister_device(eeepc_wmi_input_dev);
- pr_err("EEEPC WMI: Unable to register notify handler - %d\n",
- status);
- return -ENODEV;
+ 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)
{
- wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
- sparse_keymap_free(eeepc_wmi_input_dev);
- input_unregister_device(eeepc_wmi_input_dev);
+ 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);
git.openpandora.org / pandora-kernel.git / blobdiff