/*
- * acpi_button.c - ACPI Button Driver ($Revision: 30 $)
+ * button.c - ACPI Button Driver
*
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#define PREFIX "ACPI: "
+
#define ACPI_BUTTON_CLASS "button"
#define ACPI_BUTTON_FILE_INFO "info"
#define ACPI_BUTTON_FILE_STATE "state"
#define ACPI_BUTTON_SUBCLASS_POWER "power"
#define ACPI_BUTTON_HID_POWER "PNP0C0C"
-#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
-#define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
+#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
#define ACPI_BUTTON_TYPE_POWER 0x01
-#define ACPI_BUTTON_TYPE_POWERF 0x02
#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
-#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
-#define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
+#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
#define ACPI_BUTTON_TYPE_SLEEP 0x03
-#define ACPI_BUTTON_TYPE_SLEEPF 0x04
#define ACPI_BUTTON_SUBCLASS_LID "lid"
#define ACPI_BUTTON_HID_LID "PNP0C0D"
static int acpi_button_add(struct acpi_device *device);
static int acpi_button_remove(struct acpi_device *device, int type);
static int acpi_button_resume(struct acpi_device *device);
+static void acpi_button_notify(struct acpi_device *device, u32 event);
static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
.add = acpi_button_add,
.resume = acpi_button_resume,
.remove = acpi_button_remove,
+ .notify = acpi_button_notify,
},
};
struct acpi_button {
- struct acpi_device *device; /* Fixed button kludge */
unsigned int type;
struct input_dev *input;
char phys[32]; /* for input device */
.release = single_release,
};
+static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
+static struct acpi_device *lid_device;
+
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_button *button = seq->private;
-
- if (!button || !button->device)
- return 0;
+ struct acpi_device *device = seq->private;
seq_printf(seq, "type: %s\n",
- acpi_device_name(button->device));
-
+ acpi_device_name(device));
return 0;
}
static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_button *button = seq->private;
+ struct acpi_device *device = seq->private;
acpi_status status;
unsigned long long state;
- if (!button || !button->device)
- return 0;
-
- status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
+ status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
seq_printf(seq, "state: %s\n",
ACPI_FAILURE(status) ? "unsupported" :
(state ? "open" : "closed"));
static int acpi_button_add_fs(struct acpi_device *device)
{
+ struct acpi_button *button = acpi_driver_data(device);
struct proc_dir_entry *entry = NULL;
- struct acpi_button *button;
-
- if (!device || !acpi_driver_data(device))
- return -EINVAL;
-
- button = acpi_driver_data(device);
switch (button->type) {
case ACPI_BUTTON_TYPE_POWER:
- case ACPI_BUTTON_TYPE_POWERF:
if (!acpi_power_dir)
acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
acpi_button_dir);
entry = acpi_power_dir;
break;
case ACPI_BUTTON_TYPE_SLEEP:
- case ACPI_BUTTON_TYPE_SLEEPF:
if (!acpi_sleep_dir)
acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
acpi_button_dir);
if (!entry)
return -ENODEV;
- entry->owner = THIS_MODULE;
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
if (!acpi_device_dir(device))
return -ENODEV;
- acpi_device_dir(device)->owner = THIS_MODULE;
/* 'info' [R] */
entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
S_IRUGO, acpi_device_dir(device),
- &acpi_button_info_fops,
- acpi_driver_data(device));
+ &acpi_button_info_fops, device);
if (!entry)
return -ENODEV;
if (button->type == ACPI_BUTTON_TYPE_LID) {
entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
S_IRUGO, acpi_device_dir(device),
- &acpi_button_state_fops,
- acpi_driver_data(device));
+ &acpi_button_state_fops, device);
if (!entry)
return -ENODEV;
}
/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
-static int acpi_lid_send_state(struct acpi_button *button)
+int acpi_lid_notifier_register(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
+}
+EXPORT_SYMBOL(acpi_lid_notifier_register);
+
+int acpi_lid_notifier_unregister(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
+}
+EXPORT_SYMBOL(acpi_lid_notifier_unregister);
+
+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;
+}
+EXPORT_SYMBOL(acpi_lid_open);
+
+static int acpi_lid_send_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(button->device->handle, "_LID", NULL,
- &state);
+ status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
if (ACPI_FAILURE(status))
return -ENODEV;
+
/* input layer checks if event is redundant */
input_report_switch(button->input, SW_LID, !state);
input_sync(button->input);
- return 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 void acpi_button_notify(acpi_handle handle, u32 event, void *data)
+static void acpi_button_notify(struct acpi_device *device, u32 event)
{
- struct acpi_button *button = data;
+ struct acpi_button *button = acpi_driver_data(device);
struct input_dev *input;
- if (!button || !button->device)
- return;
-
switch (event) {
+ case ACPI_FIXED_HARDWARE_EVENT:
+ event = ACPI_BUTTON_NOTIFY_STATUS;
+ /* fall through */
case ACPI_BUTTON_NOTIFY_STATUS:
input = button->input;
if (button->type == ACPI_BUTTON_TYPE_LID) {
- acpi_lid_send_state(button);
+ acpi_lid_send_state(device);
} else {
int keycode = test_bit(KEY_SLEEP, input->keybit) ?
KEY_SLEEP : KEY_POWER;
input_sync(input);
}
- acpi_bus_generate_proc_event(button->device, event,
- ++button->pushed);
+ acpi_bus_generate_proc_event(device, event, ++button->pushed);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
-
- return;
-}
-
-static acpi_status acpi_button_notify_fixed(void *data)
-{
- struct acpi_button *button = data;
-
- if (!button)
- return AE_BAD_PARAMETER;
-
- acpi_button_notify(button->device->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
-
- return AE_OK;
-}
-
-static int acpi_button_install_notify_handlers(struct acpi_button *button)
-{
- acpi_status status;
-
- switch (button->type) {
- case ACPI_BUTTON_TYPE_POWERF:
- status =
- acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
- acpi_button_notify_fixed,
- button);
- break;
- case ACPI_BUTTON_TYPE_SLEEPF:
- status =
- acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
- acpi_button_notify_fixed,
- button);
- break;
- default:
- status = acpi_install_notify_handler(button->device->handle,
- ACPI_DEVICE_NOTIFY,
- acpi_button_notify,
- button);
- break;
- }
-
- return ACPI_FAILURE(status) ? -ENODEV : 0;
}
static int acpi_button_resume(struct acpi_device *device)
{
- struct acpi_button *button;
- if (!device)
- return -EINVAL;
- button = acpi_driver_data(device);
- if (button && button->type == ACPI_BUTTON_TYPE_LID)
- return acpi_lid_send_state(button);
- return 0;
-}
+ struct acpi_button *button = acpi_driver_data(device);
-static void acpi_button_remove_notify_handlers(struct acpi_button *button)
-{
- switch (button->type) {
- case ACPI_BUTTON_TYPE_POWERF:
- acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
- acpi_button_notify_fixed);
- break;
- case ACPI_BUTTON_TYPE_SLEEPF:
- acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
- acpi_button_notify_fixed);
- break;
- default:
- acpi_remove_notify_handler(button->device->handle,
- ACPI_DEVICE_NOTIFY,
- acpi_button_notify);
- break;
- }
+ if (button->type == ACPI_BUTTON_TYPE_LID)
+ return acpi_lid_send_state(device);
+ return 0;
}
static int acpi_button_add(struct acpi_device *device)
{
- int error;
struct acpi_button *button;
struct input_dev *input;
-
- if (!device)
- return -EINVAL;
+ char *hid, *name, *class;
+ int error;
button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
if (!button)
return -ENOMEM;
- button->device = device;
device->driver_data = button;
button->input = input = input_allocate_device();
goto err_free_button;
}
- /*
- * Determine the button type (via hid), as fixed-feature buttons
- * need to be handled a bit differently than generic-space.
- */
- if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
+ hid = acpi_device_hid(device);
+ name = acpi_device_name(device);
+ class = acpi_device_class(device);
+
+ if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
+ !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
button->type = ACPI_BUTTON_TYPE_POWER;
- strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
- sprintf(acpi_device_class(device), "%s/%s",
- ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
- } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
- button->type = ACPI_BUTTON_TYPE_POWERF;
- strcpy(acpi_device_name(device),
- ACPI_BUTTON_DEVICE_NAME_POWERF);
- sprintf(acpi_device_class(device), "%s/%s",
+ strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
+ sprintf(class, "%s/%s",
ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
- } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
+ } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
+ !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
button->type = ACPI_BUTTON_TYPE_SLEEP;
- strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
- sprintf(acpi_device_class(device), "%s/%s",
+ strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
+ sprintf(class, "%s/%s",
ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
- } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
- button->type = ACPI_BUTTON_TYPE_SLEEPF;
- strcpy(acpi_device_name(device),
- ACPI_BUTTON_DEVICE_NAME_SLEEPF);
- sprintf(acpi_device_class(device), "%s/%s",
- ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
- } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
+ } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
button->type = ACPI_BUTTON_TYPE_LID;
- strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
- sprintf(acpi_device_class(device), "%s/%s",
+ strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
+ sprintf(class, "%s/%s",
ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
} else {
- printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
- acpi_device_hid(device));
+ printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
error = -ENODEV;
goto err_free_input;
}
if (error)
goto err_free_input;
- error = acpi_button_install_notify_handlers(button);
- if (error)
- goto err_remove_fs;
+ snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
- snprintf(button->phys, sizeof(button->phys),
- "%s/button/input0", acpi_device_hid(device));
-
- input->name = acpi_device_name(device);
+ input->name = name;
input->phys = button->phys;
input->id.bustype = BUS_HOST;
input->id.product = button->type;
switch (button->type) {
case ACPI_BUTTON_TYPE_POWER:
- case ACPI_BUTTON_TYPE_POWERF:
input->evbit[0] = BIT_MASK(EV_KEY);
set_bit(KEY_POWER, input->keybit);
break;
case ACPI_BUTTON_TYPE_SLEEP:
- case ACPI_BUTTON_TYPE_SLEEPF:
input->evbit[0] = BIT_MASK(EV_KEY);
set_bit(KEY_SLEEP, input->keybit);
break;
error = input_register_device(input);
if (error)
- goto err_remove_handlers;
- if (button->type == ACPI_BUTTON_TYPE_LID)
- acpi_lid_send_state(button);
+ goto err_remove_fs;
+ if (button->type == ACPI_BUTTON_TYPE_LID) {
+ acpi_lid_send_state(device);
+ /*
+ * This assumes there's only one lid device, or if there are
+ * more we only care about the last one...
+ */
+ lid_device = device;
+ }
if (device->wakeup.flags.valid) {
/* Button's GPE is run-wake GPE */
device->wakeup.state.enabled = 1;
}
- printk(KERN_INFO PREFIX "%s [%s]\n",
- acpi_device_name(device), acpi_device_bid(device));
-
+ printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
return 0;
- err_remove_handlers:
- acpi_button_remove_notify_handlers(button);
err_remove_fs:
acpi_button_remove_fs(device);
err_free_input:
static int acpi_button_remove(struct acpi_device *device, int type)
{
- struct acpi_button *button;
-
- if (!device || !acpi_driver_data(device))
- return -EINVAL;
-
- button = acpi_driver_data(device);
+ struct acpi_button *button = acpi_driver_data(device);
- acpi_button_remove_notify_handlers(button);
acpi_button_remove_fs(device);
input_unregister_device(button->input);
kfree(button);
-
return 0;
}
acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
if (!acpi_button_dir)
return -ENODEV;
- acpi_button_dir->owner = THIS_MODULE;
+
result = acpi_bus_register_driver(&acpi_button_driver);
if (result < 0) {
remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff