#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
#define ACPI_BUTTON_TYPE_LID 0x05
+#define ACPI_BUTTON_LID_INIT_IGNORE 0x00
+#define ACPI_BUTTON_LID_INIT_OPEN 0x01
+#define ACPI_BUTTON_LID_INIT_METHOD 0x02
+
#define _COMPONENT ACPI_BUTTON_COMPONENT
ACPI_MODULE_NAME("button");
static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
static struct acpi_device *lid_device;
+static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD;
/* --------------------------------------------------------------------------
FS Interface (/proc)
static struct proc_dir_entry *acpi_button_dir;
static struct proc_dir_entry *acpi_lid_dir;
+static int acpi_lid_evaluate_state(struct acpi_device *device)
+{
+ unsigned long long lid_state;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ return lid_state ? 1 : 0;
+}
+
+static int acpi_lid_notify_state(struct acpi_device *device, int state)
+{
+ struct acpi_button *button = acpi_driver_data(device);
+ int ret;
+
+ /* input layer checks if event is redundant */
+ input_report_switch(button->input, SW_LID, !state);
+ input_sync(button->input);
+
+ if (state)
+ pm_wakeup_event(&device->dev, 0);
+
+ ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
+ if (ret == NOTIFY_DONE)
+ ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
+ device);
+ if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {
+ /*
+ * It is also regarded as success if the notifier_chain
+ * returns NOTIFY_OK or NOTIFY_DONE.
+ */
+ ret = 0;
+ }
+ return ret;
+}
+
static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
{
struct acpi_device *device = seq->private;
- acpi_status status;
- unsigned long long state;
+ int state;
- status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
+ state = acpi_lid_evaluate_state(device);
seq_printf(seq, "state: %s\n",
- ACPI_FAILURE(status) ? "unsupported" :
- (state ? "open" : "closed"));
+ state < 0 ? "unsupported" : (state ? "open" : "closed"));
return 0;
}
int acpi_lid_open(void)
{
- acpi_status status;
- unsigned long long state;
-
if (!lid_device)
return -ENODEV;
- status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
- &state);
- if (ACPI_FAILURE(status))
- return -ENODEV;
-
- return !!state;
+ return acpi_lid_evaluate_state(lid_device);
}
EXPORT_SYMBOL(acpi_lid_open);
-static int acpi_lid_send_state(struct acpi_device *device)
+static int acpi_lid_update_state(struct acpi_device *device)
{
- struct acpi_button *button = acpi_driver_data(device);
- unsigned long long state;
- acpi_status status;
- int ret;
-
- status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
- if (ACPI_FAILURE(status))
- return -ENODEV;
+ int state;
- /* input layer checks if event is redundant */
- input_report_switch(button->input, SW_LID, !state);
- input_sync(button->input);
+ state = acpi_lid_evaluate_state(device);
+ if (state < 0)
+ return state;
- if (state)
- pm_wakeup_event(&device->dev, 0);
+ return acpi_lid_notify_state(device, state);
+}
- ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
- if (ret == NOTIFY_DONE)
- ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
- device);
- if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {
- /*
- * It is also regarded as success if the notifier_chain
- * returns NOTIFY_OK or NOTIFY_DONE.
- */
- ret = 0;
+static void acpi_lid_initialize_state(struct acpi_device *device)
+{
+ switch (lid_init_state) {
+ case ACPI_BUTTON_LID_INIT_OPEN:
+ (void)acpi_lid_notify_state(device, 1);
+ break;
+ case ACPI_BUTTON_LID_INIT_METHOD:
+ (void)acpi_lid_update_state(device);
+ break;
+ case ACPI_BUTTON_LID_INIT_IGNORE:
+ default:
+ break;
}
- return ret;
}
static void acpi_button_notify(struct acpi_device *device, u32 event)
case ACPI_BUTTON_NOTIFY_STATUS:
input = button->input;
if (button->type == ACPI_BUTTON_TYPE_LID) {
- acpi_lid_send_state(device);
+ acpi_lid_update_state(device);
} else {
int keycode;
button->suspended = false;
if (button->type == ACPI_BUTTON_TYPE_LID)
- return acpi_lid_send_state(device);
+ acpi_lid_initialize_state(device);
return 0;
}
#endif
if (error)
goto err_remove_fs;
if (button->type == ACPI_BUTTON_TYPE_LID) {
- acpi_lid_send_state(device);
+ acpi_lid_initialize_state(device);
/*
* This assumes there's only one lid device, or if there are
* more we only care about the last one...
return 0;
}
+static int param_set_lid_init_state(const char *val, struct kernel_param *kp)
+{
+ int result = 0;
+
+ if (!strncmp(val, "open", sizeof("open") - 1)) {
+ lid_init_state = ACPI_BUTTON_LID_INIT_OPEN;
+ pr_info("Notify initial lid state as open\n");
+ } else if (!strncmp(val, "method", sizeof("method") - 1)) {
+ lid_init_state = ACPI_BUTTON_LID_INIT_METHOD;
+ pr_info("Notify initial lid state with _LID return value\n");
+ } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) {
+ lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE;
+ pr_info("Do not notify initial lid state\n");
+ } else
+ result = -EINVAL;
+ return result;
+}
+
+static int param_get_lid_init_state(char *buffer, struct kernel_param *kp)
+{
+ switch (lid_init_state) {
+ case ACPI_BUTTON_LID_INIT_OPEN:
+ return sprintf(buffer, "open");
+ case ACPI_BUTTON_LID_INIT_METHOD:
+ return sprintf(buffer, "method");
+ case ACPI_BUTTON_LID_INIT_IGNORE:
+ return sprintf(buffer, "ignore");
+ default:
+ return sprintf(buffer, "invalid");
+ }
+ return 0;
+}
+
+module_param_call(lid_init_state,
+ param_set_lid_init_state, param_get_lid_init_state,
+ NULL, 0644);
+MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state");
+
module_acpi_driver(acpi_button_driver);
projects / linux-2.6-block.git / blobdiff