diff options
Diffstat (limited to 'drivers/acpi/button.c')
| -rw-r--r-- | drivers/acpi/button.c | 531 |
1 files changed, 326 insertions, 205 deletions
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 0f45d45f05a..db35594d4df 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -1,5 +1,5 @@ /* - * 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> @@ -26,28 +26,31 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> -#include <acpi/acpi_bus.h> -#include <acpi/acpi_drivers.h> +#include <linux/types.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/input.h> +#include <linux/slab.h> +#include <linux/acpi.h> +#include <acpi/button.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" @@ -55,261 +58,379 @@ #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); +static void acpi_button_notify(struct acpi_device *device, u32 event); -static int acpi_button_add (struct acpi_device *device); -static int acpi_button_remove (struct acpi_device *device, int type); +#ifdef CONFIG_PM_SLEEP +static int acpi_button_resume(struct device *dev); +#else +#define acpi_button_resume NULL +#endif +static SIMPLE_DEV_PM_OPS(acpi_button_pm, NULL, acpi_button_resume); 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, + .remove = acpi_button_remove, + .notify = acpi_button_notify, + }, + .drv.pm = &acpi_button_pm, }; 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 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 struct proc_dir_entry *acpi_lid_dir; + +static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) { - struct acpi_button *button = (struct acpi_button *) data; + 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; +} - ACPI_FUNCTION_TRACE("acpi_button_notify"); +static int acpi_button_state_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode)); +} - if (!button || !button->device) - return_VOID; +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, +}; - 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; +static int acpi_button_add_fs(struct acpi_device *device) +{ + struct acpi_button *button = acpi_driver_data(device); + struct proc_dir_entry *entry = NULL; + int ret = 0; + + /* procfs I/F for ACPI lid device only */ + if (button->type != ACPI_BUTTON_TYPE_LID) + return 0; + + if (acpi_button_dir || acpi_lid_dir) { + printk(KERN_ERR PREFIX "More than one Lid device found!\n"); + return -EEXIST; } - return_VOID; -} + /* create /proc/acpi/button */ + acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); + if (!acpi_button_dir) + return -ENODEV; + /* create /proc/acpi/button/lid */ + acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); + if (!acpi_lid_dir) { + ret = -ENODEV; + goto remove_button_dir; + } + + /* create /proc/acpi/button/lid/LID/ */ + acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); + if (!acpi_device_dir(device)) { + ret = -ENODEV; + goto remove_lid_dir; + } -static acpi_status -acpi_button_notify_fixed ( - void *data) + /* create /proc/acpi/button/lid/LID/state */ + entry = proc_create_data(ACPI_BUTTON_FILE_STATE, + S_IRUGO, acpi_device_dir(device), + &acpi_button_state_fops, device); + if (!entry) { + ret = -ENODEV; + goto remove_dev_dir; + } + +done: + return ret; + +remove_dev_dir: + remove_proc_entry(acpi_device_bid(device), + acpi_lid_dir); + acpi_device_dir(device) = NULL; +remove_lid_dir: + remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); +remove_button_dir: + remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + goto done; +} + +static int acpi_button_remove_fs(struct acpi_device *device) { - struct acpi_button *button = (struct acpi_button *) data; - - ACPI_FUNCTION_TRACE("acpi_button_notify_fixed"); + struct acpi_button *button = acpi_driver_data(device); - BUG_ON(!button); + if (button->type != ACPI_BUTTON_TYPE_LID) + return 0; - acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button); + remove_proc_entry(ACPI_BUTTON_FILE_STATE, + acpi_device_dir(device)); + remove_proc_entry(acpi_device_bid(device), + acpi_lid_dir); + acpi_device_dir(device) = NULL; + remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); + remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); - return_ACPI_STATUS(AE_OK); + 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); -static int -acpi_button_add ( - struct acpi_device *device) +int acpi_lid_notifier_unregister(struct notifier_block *nb) { - int result = 0; - acpi_status status = AE_OK; - struct acpi_button *button = NULL; + return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); +} +EXPORT_SYMBOL(acpi_lid_notifier_unregister); - ACPI_FUNCTION_TRACE("acpi_button_add"); +int acpi_lid_open(void) +{ + acpi_status status; + unsigned long long state; - if (!device) - return_VALUE(-EINVAL); + if (!lid_device) + return -ENODEV; - 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; - } + status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL, + &state); + if (ACPI_FAILURE(status)) + return -ENODEV; - 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; - } + return !!state; +} +EXPORT_SYMBOL(acpi_lid_open); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error installing notify handler\n")); - result = -ENODEV; - goto end; - } +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; - 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; + 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); + + 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; +} - printk(KERN_INFO PREFIX "%s [%s]\n", - acpi_device_name(device), acpi_device_bid(device)); +static void acpi_button_notify(struct acpi_device *device, u32 event) +{ + struct acpi_button *button = acpi_driver_data(device); + struct input_dev *input; -end: - if (result) { - kfree(button); + 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); + + pm_wakeup_event(&device->dev, 0); + acpi_bus_generate_netlink_event( + device->pnp.device_class, + dev_name(&device->dev), + event, ++button->pushed); + } + break; + default: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Unsupported event [0x%x]\n", event)); + break; } - - return_VALUE(result); } +#ifdef CONFIG_PM_SLEEP +static int acpi_button_resume(struct device *dev) +{ + struct acpi_device *device = to_acpi_device(dev); + struct acpi_button *button = acpi_driver_data(device); + + if (button->type == ACPI_BUTTON_TYPE_LID) + return acpi_lid_send_state(device); + return 0; +} +#endif -static int -acpi_button_remove (struct acpi_device *device, int type) +static int acpi_button_add(struct acpi_device *device) { - acpi_status status = 0; - struct acpi_button *button = NULL; + struct acpi_button *button; + struct input_dev *input; + const char *hid = acpi_device_hid(device); + char *name, *class; + int error; - ACPI_FUNCTION_TRACE("acpi_button_remove"); + button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); + if (!button) + return -ENOMEM; - if (!device || !acpi_driver_data(device)) - return_VALUE(-EINVAL); + device->driver_data = button; - button = acpi_driver_data(device); + button->input = input = input_allocate_device(); + if (!input) { + error = -ENOMEM; + goto err_free_button; + } - /* 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; + 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(hid, ACPI_BUTTON_HID_SLEEP) || + !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { + button->type = ACPI_BUTTON_TYPE_SLEEP; + strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); + sprintf(class, "%s/%s", + ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); + } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { + button->type = ACPI_BUTTON_TYPE_LID; + 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; } - if (ACPI_FAILURE(status)) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error removing notify handler\n")); + error = acpi_button_add_fs(device); + if (error) + goto err_free_input; - kfree(button); + snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); - return_VALUE(0); -} + 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_POWER: + input_set_capability(input, EV_KEY, KEY_POWER); + break; -static int __init -acpi_button_init (void) -{ - int result = 0; + case ACPI_BUTTON_TYPE_SLEEP: + input_set_capability(input, EV_KEY, KEY_SLEEP); + break; - ACPI_FUNCTION_TRACE("acpi_button_init"); + case ACPI_BUTTON_TYPE_LID: + input_set_capability(input, EV_SW, SW_LID); + break; + } - result = acpi_bus_register_driver(&acpi_button_driver); - if (result < 0) { - return_VALUE(-ENODEV); + 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; } - return_VALUE(0); + printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); + return 0; + + err_remove_fs: + acpi_button_remove_fs(device); + err_free_input: + input_free_device(input); + err_free_button: + kfree(button); + return error; } -static void __exit -acpi_button_exit (void) +static int acpi_button_remove(struct acpi_device *device) { - ACPI_FUNCTION_TRACE("acpi_button_exit"); - - acpi_bus_unregister_driver(&acpi_button_driver); + struct acpi_button *button = acpi_driver_data(device); - return_VOID; + acpi_button_remove_fs(device); + input_unregister_device(button->input); + kfree(button); + return 0; } -module_init(acpi_button_init); -module_exit(acpi_button_exit); +module_acpi_driver(acpi_button_driver); |