/*
- * 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 <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/input.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#define PREFIX "ACPI: "
-#define ACPI_BUTTON_COMPONENT 0x00080000
-#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
#define ACPI_BUTTON_CLASS "button"
+#define ACPI_BUTTON_FILE_INFO "info"
+#define ACPI_BUTTON_FILE_STATE "state"
+#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
#define ACPI_BUTTON_NOTIFY_STATUS 0x80
#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_HID_POWER "PNP0C0C"
+#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"
#define ACPI_BUTTON_TYPE_LID 0x05
#define _COMPONENT ACPI_BUTTON_COMPONENT
-ACPI_MODULE_NAME ("acpi_button")
+ACPI_MODULE_NAME("button");
MODULE_AUTHOR("Paul Diefenbaugh");
-MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME);
+MODULE_DESCRIPTION("ACPI Button Driver");
MODULE_LICENSE("GPL");
+static const struct acpi_device_id button_device_ids[] = {
+ {ACPI_BUTTON_HID_LID, 0},
+ {ACPI_BUTTON_HID_SLEEP, 0},
+ {ACPI_BUTTON_HID_SLEEPF, 0},
+ {ACPI_BUTTON_HID_POWER, 0},
+ {ACPI_BUTTON_HID_POWERF, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, button_device_ids);
-static int acpi_button_add (struct acpi_device *device);
-static int acpi_button_remove (struct acpi_device *device, int type);
+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);
static struct acpi_driver acpi_button_driver = {
- .name = ACPI_BUTTON_DRIVER_NAME,
- .class = ACPI_BUTTON_CLASS,
- .ids = "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E",
- .ops = {
- .add = acpi_button_add,
- .remove = acpi_button_remove,
- },
+ .name = "button",
+ .class = ACPI_BUTTON_CLASS,
+ .ids = button_device_ids,
+ .ops = {
+ .add = acpi_button_add,
+ .resume = acpi_button_resume,
+ .remove = acpi_button_remove,
+ .notify = acpi_button_notify,
+ },
};
struct acpi_button {
- acpi_handle handle;
- struct acpi_device *device; /* Fixed button kludge */
- u8 type;
- unsigned long pushed;
+ unsigned int type;
+ struct input_dev *input;
+ char phys[32]; /* for input device */
+ unsigned long pushed;
+};
+
+static const struct file_operations acpi_button_info_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_button_info_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
};
+static const struct file_operations acpi_button_state_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_button_state_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
+static struct acpi_device *lid_device;
+
/* --------------------------------------------------------------------------
- Driver Interface
+ FS Interface (/proc)
-------------------------------------------------------------------------- */
-static void
-acpi_button_notify (
- acpi_handle handle,
- u32 event,
- void *data)
+static struct proc_dir_entry *acpi_button_dir;
+
+static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_button *button = (struct acpi_button *) data;
+ struct acpi_device *device = seq->private;
- ACPI_FUNCTION_TRACE("acpi_button_notify");
+ seq_printf(seq, "type: %s\n",
+ acpi_device_name(device));
+ return 0;
+}
- if (!button || !button->device)
- return_VOID;
+static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
+}
- switch (event) {
- case ACPI_BUTTON_NOTIFY_STATUS:
- acpi_bus_generate_event(button->device, event, ++button->pushed);
+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;
+
+ status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
+ seq_printf(seq, "state: %s\n",
+ ACPI_FAILURE(status) ? "unsupported" :
+ (state ? "open" : "closed"));
+ return 0;
+}
+
+static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
+}
+
+static struct proc_dir_entry *acpi_power_dir;
+static struct proc_dir_entry *acpi_sleep_dir;
+static struct proc_dir_entry *acpi_lid_dir;
+
+static int acpi_button_add_fs(struct acpi_device *device)
+{
+ struct acpi_button *button = acpi_driver_data(device);
+ struct proc_dir_entry *entry = NULL;
+
+ switch (button->type) {
+ case ACPI_BUTTON_TYPE_POWER:
+ if (!acpi_power_dir)
+ acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
+ acpi_button_dir);
+ entry = acpi_power_dir;
break;
- default:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Unsupported event [0x%x]\n", event));
+ case ACPI_BUTTON_TYPE_SLEEP:
+ if (!acpi_sleep_dir)
+ acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
+ acpi_button_dir);
+ entry = acpi_sleep_dir;
break;
+ case ACPI_BUTTON_TYPE_LID:
+ if (!acpi_lid_dir)
+ acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
+ acpi_button_dir);
+ entry = acpi_lid_dir;
+ break;
+ }
+
+ if (!entry)
+ return -ENODEV;
+
+ acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
+ if (!acpi_device_dir(device))
+ return -ENODEV;
+
+ /* 'info' [R] */
+ entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
+ S_IRUGO, acpi_device_dir(device),
+ &acpi_button_info_fops, device);
+ if (!entry)
+ return -ENODEV;
+
+ /* show lid state [R] */
+ 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, device);
+ if (!entry)
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int acpi_button_remove_fs(struct acpi_device *device)
+{
+ struct acpi_button *button = acpi_driver_data(device);
+
+ if (acpi_device_dir(device)) {
+ if (button->type == ACPI_BUTTON_TYPE_LID)
+ remove_proc_entry(ACPI_BUTTON_FILE_STATE,
+ acpi_device_dir(device));
+ remove_proc_entry(ACPI_BUTTON_FILE_INFO,
+ acpi_device_dir(device));
+
+ remove_proc_entry(acpi_device_bid(device),
+ acpi_device_dir(device)->parent);
+ acpi_device_dir(device) = NULL;
}
- return_VOID;
+ return 0;
+}
+
+/* --------------------------------------------------------------------------
+ Driver Interface
+ -------------------------------------------------------------------------- */
+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);
-static acpi_status
-acpi_button_notify_fixed (
- void *data)
+int acpi_lid_open(void)
{
- struct acpi_button *button = (struct acpi_button *) data;
-
- ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");
+ acpi_status status;
+ unsigned long long state;
- BUG_ON(!button);
+ if (!lid_device)
+ return -ENODEV;
- acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
+ status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
+ &state);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
- return_ACPI_STATUS(AE_OK);
+ 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(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);
+
+ 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_add (
- struct acpi_device *device)
+static void acpi_button_notify(struct acpi_device *device, u32 event)
{
- int result = 0;
- acpi_status status = AE_OK;
- struct acpi_button *button = NULL;
+ struct acpi_button *button = acpi_driver_data(device);
+ struct input_dev *input;
- ACPI_FUNCTION_TRACE("acpi_button_add");
+ 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(device);
+ } else {
+ int keycode = test_bit(KEY_SLEEP, input->keybit) ?
+ KEY_SLEEP : KEY_POWER;
+
+ input_report_key(input, keycode, 1);
+ input_sync(input);
+ input_report_key(input, keycode, 0);
+ input_sync(input);
+ }
+
+ acpi_bus_generate_proc_event(device, event, ++button->pushed);
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+}
- if (!device)
- return_VALUE(-EINVAL);
+static int acpi_button_resume(struct acpi_device *device)
+{
+ struct acpi_button *button = acpi_driver_data(device);
+
+ if (button->type == ACPI_BUTTON_TYPE_LID)
+ return acpi_lid_send_state(device);
+ return 0;
+}
- button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
+static int acpi_button_add(struct acpi_device *device)
+{
+ struct acpi_button *button;
+ struct input_dev *input;
+ char *hid, *name, *class;
+ int error;
+
+ button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
if (!button)
- return_VALUE(-ENOMEM);
- memset(button, 0, sizeof(struct acpi_button));
-
- button->device = device;
- button->handle = device->handle;
- acpi_driver_data(device) = 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)) {
- 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);
+ return -ENOMEM;
+
+ device->driver_data = button;
+
+ button->input = input = input_allocate_device();
+ if (!input) {
+ error = -ENOMEM;
+ goto err_free_button;
}
- 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",
+
+ 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(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",
- 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",
+ 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_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", hid);
+ error = -ENODEV;
+ goto err_free_input;
}
- else {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unsupported hid [%s]\n",
- acpi_device_hid(device)));
- result = -ENODEV;
- goto end;
- }
+
+ error = acpi_button_add_fs(device);
+ if (error)
+ goto err_free_input;
+
+ snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
+
+ input->name = name;
+ input->phys = button->phys;
+ input->id.bustype = BUS_HOST;
+ input->id.product = button->type;
+ input->dev.parent = &device->dev;
switch (button->type) {
- case ACPI_BUTTON_TYPE_POWERF:
- status = acpi_install_fixed_event_handler (
- ACPI_EVENT_POWER_BUTTON,
- acpi_button_notify_fixed,
- button);
+ case ACPI_BUTTON_TYPE_POWER:
+ input->evbit[0] = BIT_MASK(EV_KEY);
+ set_bit(KEY_POWER, input->keybit);
break;
- case ACPI_BUTTON_TYPE_SLEEPF:
- status = acpi_install_fixed_event_handler (
- ACPI_EVENT_SLEEP_BUTTON,
- acpi_button_notify_fixed,
- button);
+
+ case ACPI_BUTTON_TYPE_SLEEP:
+ input->evbit[0] = BIT_MASK(EV_KEY);
+ set_bit(KEY_SLEEP, input->keybit);
break;
- default:
- status = acpi_install_notify_handler (
- button->handle,
- ACPI_DEVICE_NOTIFY,
- acpi_button_notify,
- button);
+
+ case ACPI_BUTTON_TYPE_LID:
+ input->evbit[0] = BIT_MASK(EV_SW);
+ set_bit(SW_LID, input->swbit);
break;
}
- if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error installing notify handler\n"));
- result = -ENODEV;
- goto end;
+ error = input_register_device(input);
+ if (error)
+ 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 */
- acpi_set_gpe_type(device->wakeup.gpe_device,
- device->wakeup.gpe_number, ACPI_GPE_TYPE_WAKE_RUN);
- acpi_enable_gpe(device->wakeup.gpe_device,
- device->wakeup.gpe_number, ACPI_NOT_ISR);
+ acpi_set_gpe_type(device->wakeup.gpe_device,
+ device->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
+ acpi_enable_gpe(device->wakeup.gpe_device,
+ device->wakeup.gpe_number);
device->wakeup.state.enabled = 1;
}
- printk(KERN_INFO PREFIX "%s [%s]\n",
- acpi_device_name(device), acpi_device_bid(device));
-
-end:
- if (result) {
- kfree(button);
- }
+ printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
+ return 0;
- return_VALUE(result);
+ err_remove_fs:
+ acpi_button_remove_fs(device);
+ err_free_input:
+ input_free_device(input);
+ err_free_button:
+ kfree(button);
+ return error;
}
-
-static int
-acpi_button_remove (struct acpi_device *device, int type)
+static int acpi_button_remove(struct acpi_device *device, int type)
{
- acpi_status status = 0;
- struct acpi_button *button = NULL;
-
- ACPI_FUNCTION_TRACE("acpi_button_remove");
-
- if (!device || !acpi_driver_data(device))
- return_VALUE(-EINVAL);
-
- button = acpi_driver_data(device);
-
- /* Unregister for device notifications. */
- switch (button->type) {
- case ACPI_BUTTON_TYPE_POWERF:
- status = acpi_remove_fixed_event_handler(
- ACPI_EVENT_POWER_BUTTON, acpi_button_notify_fixed);
- break;
- case ACPI_BUTTON_TYPE_SLEEPF:
- status = acpi_remove_fixed_event_handler(
- ACPI_EVENT_SLEEP_BUTTON, acpi_button_notify_fixed);
- break;
- default:
- status = acpi_remove_notify_handler(button->handle,
- ACPI_DEVICE_NOTIFY, acpi_button_notify);
- break;
- }
-
- if (ACPI_FAILURE(status))
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error removing notify handler\n"));
+ struct acpi_button *button = acpi_driver_data(device);
+ acpi_button_remove_fs(device);
+ input_unregister_device(button->input);
kfree(button);
-
- return_VALUE(0);
+ return 0;
}
-
-static int __init
-acpi_button_init (void)
+static int __init acpi_button_init(void)
{
- int result = 0;
+ int result;
- ACPI_FUNCTION_TRACE("acpi_button_init");
+ acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
+ if (!acpi_button_dir)
+ return -ENODEV;
result = acpi_bus_register_driver(&acpi_button_driver);
if (result < 0) {
- return_VALUE(-ENODEV);
+ remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
+ return -ENODEV;
}
- return_VALUE(0);
+ return 0;
}
-static void __exit
-acpi_button_exit (void)
+static void __exit acpi_button_exit(void)
{
- ACPI_FUNCTION_TRACE("acpi_button_exit");
-
acpi_bus_unregister_driver(&acpi_button_driver);
- return_VOID;
+ if (acpi_power_dir)
+ remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
+ if (acpi_sleep_dir)
+ remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
+ if (acpi_lid_dir)
+ remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
+ remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
}
module_init(acpi_button_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff