diff options
Diffstat (limited to 'drivers/acpi/button.c')
| -rw-r--r-- | drivers/acpi/button.c | 549 |
1 files changed, 549 insertions, 0 deletions
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c new file mode 100644 index 0000000..171fd91 --- /dev/null +++ b/drivers/acpi/button.c @@ -0,0 +1,549 @@ +/* + * 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 <linux/input.h> +#include <acpi/acpi_bus.h> +#include <acpi/acpi_drivers.h> + +#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("button"); + +MODULE_AUTHOR("Paul Diefenbaugh"); +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_resume(struct acpi_device *device); +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 = "button", + .class = ACPI_BUTTON_CLASS, + .ids = button_device_ids, + .ops = { + .add = acpi_button_add, + .resume = acpi_button_resume, + .remove = acpi_button_remove, + }, +}; + +struct acpi_button { + struct acpi_device *device; /* Fixed button kludge */ + 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, +}; + +/* -------------------------------------------------------------------------- + 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 = seq->private; + + if (!button || !button->device) + return 0; + + seq_printf(seq, "type: %s\n", + acpi_device_name(button->device)); + + return 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 = 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); + 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 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); + 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; + 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)); + 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, + acpi_driver_data(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 0; +} + +/* -------------------------------------------------------------------------- + Driver Interface + -------------------------------------------------------------------------- */ +static int acpi_lid_send_state(struct acpi_button *button) +{ + unsigned long long state; + acpi_status status; + + status = acpi_evaluate_integer(button->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; +} + +static void acpi_button_notify(acpi_handle handle, u32 event, void *data) +{ + struct acpi_button *button = data; + struct input_dev *input; + + if (!button || !button->device) + return; + + switch (event) { + case ACPI_BUTTON_NOTIFY_STATUS: + input = button->input; + if (button->type == ACPI_BUTTON_TYPE_LID) { + acpi_lid_send_state(button); + } 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(button->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; +} + +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; + } +} + +static int acpi_button_add(struct acpi_device *device) +{ + int error; + struct acpi_button *button; + struct input_dev *input; + + if (!device) + return -EINVAL; + + 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(); + if (!input) { + error = -ENOMEM; + 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)) { + 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 { + printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", + acpi_device_hid(device)); + error = -ENODEV; + goto err_free_input; + } + + error = acpi_button_add_fs(device); + 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", acpi_device_hid(device)); + + input->name = acpi_device_name(device); + 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_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; + + case ACPI_BUTTON_TYPE_LID: + input->evbit[0] = BIT_MASK(EV_SW); + set_bit(SW_LID, input->swbit); + break; + } + + error = input_register_device(input); + if (error) + goto err_remove_handlers; + if (button->type == ACPI_BUTTON_TYPE_LID) + acpi_lid_send_state(button); + + 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); + device->wakeup.state.enabled = 1; + } + + printk(KERN_INFO PREFIX "%s [%s]\n", + acpi_device_name(device), 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: + input_free_device(input); + err_free_button: + kfree(button); + return error; +} + +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); + + acpi_button_remove_notify_handlers(button); + acpi_button_remove_fs(device); + input_unregister_device(button->input); + kfree(button); + + return 0; +} + +static int __init acpi_button_init(void) +{ + int result; + + 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); + return -ENODEV; + } + + return 0; +} + +static void __exit acpi_button_exit(void) +{ + acpi_bus_unregister_driver(&acpi_button_driver); + + 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); +module_exit(acpi_button_exit); |
