diff options
Diffstat (limited to 'drivers/acpi/button.c')
| -rw-r--r-- | drivers/acpi/button.c | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c new file mode 100644 index 000000000000..ec4430e3053f --- /dev/null +++ b/drivers/acpi/button.c @@ -0,0 +1,558 @@ +/* + * acpi_button.c - ACPI Button Driver ($Revision: 30 $) + * + * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> + * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#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 <acpi/acpi_bus.h> +#include <acpi/acpi_drivers.h> + + +#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_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_TYPE_SLEEP 0x03 +#define ACPI_BUTTON_TYPE_SLEEPF 0x04 + +#define ACPI_BUTTON_SUBCLASS_LID "lid" +#define ACPI_BUTTON_HID_LID "PNP0C0D" +#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" +#define ACPI_BUTTON_TYPE_LID 0x05 + +#define _COMPONENT ACPI_BUTTON_COMPONENT +ACPI_MODULE_NAME ("acpi_button") + +MODULE_AUTHOR("Paul Diefenbaugh"); +MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME); +MODULE_LICENSE("GPL"); + + +static int acpi_button_add (struct acpi_device *device); +static int acpi_button_remove (struct acpi_device *device, int type); +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, + }, +}; + +struct acpi_button { + acpi_handle handle; + struct acpi_device *device; /* Fixed button kludge */ + u8 type; + unsigned long pushed; +}; + +static struct file_operations acpi_button_info_fops = { + .open = acpi_button_info_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations acpi_button_state_fops = { + .open = acpi_button_state_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +/* -------------------------------------------------------------------------- + FS Interface (/proc) + -------------------------------------------------------------------------- */ + +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 *) seq->private; + + ACPI_FUNCTION_TRACE("acpi_button_info_seq_show"); + + if (!button || !button->device) + return_VALUE(0); + + seq_printf(seq, "type: %s\n", + acpi_device_name(button->device)); + + return_VALUE(0); +} + +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); +} + +static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) +{ + struct acpi_button *button = (struct acpi_button *) seq->private; + acpi_status status; + unsigned long state; + + ACPI_FUNCTION_TRACE("acpi_button_state_seq_show"); + + if (!button || !button->device) + return_VALUE(0); + + status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state); + if (ACPI_FAILURE(status)) { + seq_printf(seq, "state: unsupported\n"); + } + else{ + seq_printf(seq, "state: %s\n", (state ? "open" : "closed")); + } + + return_VALUE(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 int +acpi_button_add_fs ( + struct acpi_device *device) +{ + struct proc_dir_entry *entry = NULL; + struct acpi_button *button = NULL; + + ACPI_FUNCTION_TRACE("acpi_button_add_fs"); + + if (!device || !acpi_driver_data(device)) + return_VALUE(-EINVAL); + + button = acpi_driver_data(device); + + switch (button->type) { + case ACPI_BUTTON_TYPE_POWER: + case ACPI_BUTTON_TYPE_POWERF: + entry = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, + acpi_button_dir); + break; + case ACPI_BUTTON_TYPE_SLEEP: + case ACPI_BUTTON_TYPE_SLEEPF: + entry = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, + acpi_button_dir); + break; + case ACPI_BUTTON_TYPE_LID: + entry = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, + acpi_button_dir); + break; + } + + if (!entry) + return_VALUE(-ENODEV); + entry->owner = THIS_MODULE; + + acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry); + if (!acpi_device_dir(device)) + return_VALUE(-ENODEV); + acpi_device_dir(device)->owner = THIS_MODULE; + + /* 'info' [R] */ + entry = create_proc_entry(ACPI_BUTTON_FILE_INFO, + S_IRUGO, acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to create '%s' fs entry\n", + ACPI_BUTTON_FILE_INFO)); + else { + entry->proc_fops = &acpi_button_info_fops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + + /* show lid state [R] */ + if (button->type == ACPI_BUTTON_TYPE_LID) { + entry = create_proc_entry(ACPI_BUTTON_FILE_STATE, + S_IRUGO, acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to create '%s' fs entry\n", + ACPI_BUTTON_FILE_INFO)); + else { + entry->proc_fops = &acpi_button_state_fops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + } + + return_VALUE(0); +} + + +static int +acpi_button_remove_fs ( + struct acpi_device *device) +{ + struct acpi_button *button = NULL; + + ACPI_FUNCTION_TRACE("acpi_button_remove_fs"); + + 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); + + + switch (button->type) { + case ACPI_BUTTON_TYPE_POWER: + case ACPI_BUTTON_TYPE_POWERF: + remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, + acpi_button_dir); + break; + case ACPI_BUTTON_TYPE_SLEEP: + case ACPI_BUTTON_TYPE_SLEEPF: + remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, + acpi_button_dir); + break; + case ACPI_BUTTON_TYPE_LID: + remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, + acpi_button_dir); + break; + } + acpi_device_dir(device) = NULL; + } + + return_VALUE(0); +} + + +/* -------------------------------------------------------------------------- + Driver Interface + -------------------------------------------------------------------------- */ + +static void +acpi_button_notify ( + acpi_handle handle, + u32 event, + void *data) +{ + struct acpi_button *button = (struct acpi_button *) data; + + ACPI_FUNCTION_TRACE("acpi_button_notify"); + + if (!button || !button->device) + return_VOID; + + switch (event) { + case ACPI_BUTTON_NOTIFY_STATUS: + acpi_bus_generate_event(button->device, event, ++button->pushed); + break; + default: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Unsupported event [0x%x]\n", event)); + break; + } + + return_VOID; +} + + +static acpi_status +acpi_button_notify_fixed ( + void *data) +{ + struct acpi_button *button = (struct acpi_button *) data; + + ACPI_FUNCTION_TRACE("acpi_button_notify_fixed"); + + if (!button) + return_ACPI_STATUS(AE_BAD_PARAMETER); + + acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button); + + return_ACPI_STATUS(AE_OK); +} + + +static int +acpi_button_add ( + struct acpi_device *device) +{ + int result = 0; + acpi_status status = AE_OK; + struct acpi_button *button = NULL; + + static struct acpi_device *power_button; + static struct acpi_device *sleep_button; + static struct acpi_device *lid_button; + + ACPI_FUNCTION_TRACE("acpi_button_add"); + + if (!device) + return_VALUE(-EINVAL); + + button = kmalloc(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); + } + 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", + ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); + } + else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) { + 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", + ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); + } + else if (!strcmp(acpi_device_hid(device), 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", + ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); + } + else { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unsupported hid [%s]\n", + acpi_device_hid(device))); + result = -ENODEV; + goto end; + } + + /* + * Ensure only one button of each type is used. + */ + switch (button->type) { + case ACPI_BUTTON_TYPE_POWER: + case ACPI_BUTTON_TYPE_POWERF: + if (!power_button) + power_button = device; + else { + kfree(button); + return_VALUE(-ENODEV); + } + break; + case ACPI_BUTTON_TYPE_SLEEP: + case ACPI_BUTTON_TYPE_SLEEPF: + if (!sleep_button) + sleep_button = device; + else { + kfree(button); + return_VALUE(-ENODEV); + } + break; + case ACPI_BUTTON_TYPE_LID: + if (!lid_button) + lid_button = device; + else { + kfree(button); + return_VALUE(-ENODEV); + } + break; + } + + result = acpi_button_add_fs(device); + if (result) + goto end; + + 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->handle, + ACPI_DEVICE_NOTIFY, + acpi_button_notify, + button); + break; + } + + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Error installing notify handler\n")); + result = -ENODEV; + goto end; + } + + 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); + device->wakeup.state.enabled = 1; + } + + printk(KERN_INFO PREFIX "%s [%s]\n", + acpi_device_name(device), acpi_device_bid(device)); + +end: + if (result) { + acpi_button_remove_fs(device); + kfree(button); + } + + return_VALUE(result); +} + + +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")); + + acpi_button_remove_fs(device); + + kfree(button); + + return_VALUE(0); +} + + +static int __init +acpi_button_init (void) +{ + int result = 0; + + ACPI_FUNCTION_TRACE("acpi_button_init"); + + acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); + if (!acpi_button_dir) + return_VALUE(-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); + return_VALUE(-ENODEV); + } + + return_VALUE(0); +} + + +static void __exit +acpi_button_exit (void) +{ + ACPI_FUNCTION_TRACE("acpi_button_exit"); + + acpi_bus_unregister_driver(&acpi_button_driver); + + remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + + return_VOID; +} + + +module_init(acpi_button_init); +module_exit(acpi_button_exit); |