From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- drivers/acpi/button.c | 822 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 822 insertions(+) create mode 100644 drivers/acpi/button.c (limited to 'drivers/acpi/button.c') diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c new file mode 100644 index 000000000..3836ee75d --- /dev/null +++ b/drivers/acpi/button.c @@ -0,0 +1,822 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * button.c - ACPI Button Driver + * + * Copyright (C) 2001, 2002 Andy Grover + * Copyright (C) 2001, 2002 Paul Diefenbaugh + */ + +#define pr_fmt(fmt) "ACPI: button: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ACPI_BUTTON_CLASS "button" +#define ACPI_BUTTON_FILE_STATE "state" +#define ACPI_BUTTON_TYPE_UNKNOWN 0x00 +#define ACPI_BUTTON_NOTIFY_WAKE 0x02 +#define ACPI_BUTTON_NOTIFY_STATUS 0x80 + +#define ACPI_BUTTON_CLASS_POWER "button/power" +#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" +#define ACPI_BUTTON_TYPE_POWER 0x01 + +#define ACPI_BUTTON_CLASS_SLEEP "button/sleep" +#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" +#define ACPI_BUTTON_TYPE_SLEEP 0x03 + +#define ACPI_BUTTON_CLASS_LID "button/lid" +#define ACPI_BUTTON_SUBCLASS_LID "lid" +#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" +#define ACPI_BUTTON_TYPE_LID 0x05 + +enum { + ACPI_BUTTON_LID_INIT_IGNORE, + ACPI_BUTTON_LID_INIT_OPEN, + ACPI_BUTTON_LID_INIT_METHOD, + ACPI_BUTTON_LID_INIT_DISABLED, +}; + +static const char * const lid_init_state_str[] = { + [ACPI_BUTTON_LID_INIT_IGNORE] = "ignore", + [ACPI_BUTTON_LID_INIT_OPEN] = "open", + [ACPI_BUTTON_LID_INIT_METHOD] = "method", + [ACPI_BUTTON_LID_INIT_DISABLED] = "disabled", +}; + +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, ACPI_BUTTON_TYPE_LID}, + {ACPI_BUTTON_HID_SLEEP, ACPI_BUTTON_TYPE_SLEEP}, + {ACPI_BUTTON_HID_SLEEPF, ACPI_BUTTON_TYPE_SLEEP}, + {ACPI_BUTTON_HID_POWER, ACPI_BUTTON_TYPE_POWER}, + {ACPI_BUTTON_HID_POWERF, ACPI_BUTTON_TYPE_POWER}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, button_device_ids); + +/* Please keep this list sorted alphabetically by vendor and model */ +static const struct dmi_system_id dmi_lid_quirks[] = { + { + /* GP-electronic T701, _LID method points to a floating GPIO */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), + DMI_MATCH(DMI_PRODUCT_NAME, "T701"), + DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED, + }, + { + /* Nextbook Ares 8A tablet, _LID device always reports lid closed */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), + DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"), + DMI_MATCH(DMI_BIOS_VERSION, "M882"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED, + }, + { + /* + * Lenovo Yoga 9 14ITL5, initial notification of the LID device + * never happens. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "82BG"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Medion Akoya E2215T, notification of the LID device only + * happens on close, not on open and _LID always returns closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), + DMI_MATCH(DMI_PRODUCT_NAME, "E2215T"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Medion Akoya E2228T, notification of the LID device only + * happens on close, not on open and _LID always returns closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), + DMI_MATCH(DMI_PRODUCT_NAME, "E2228T"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Razer Blade Stealth 13 late 2019, notification of the LID device + * only happens on close, not on open and _LID always returns closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Razer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Razer Blade Stealth 13 Late 2019"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + { + /* + * Samsung galaxybook2 ,initial _LID device notification returns + * lid closed. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "750XED"), + }, + .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, + }, + {} +}; + +static int acpi_button_probe(struct platform_device *pdev); +static void acpi_button_remove(struct platform_device *pdev); + +#ifdef CONFIG_PM_SLEEP +static int acpi_button_suspend(struct device *dev); +static int acpi_button_resume(struct device *dev); +#else +#define acpi_button_suspend NULL +#define acpi_button_resume NULL +#endif +static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); + +static struct platform_driver acpi_button_driver = { + .probe = acpi_button_probe, + .remove = acpi_button_remove, + .driver = { + .name = "acpi-button", + .acpi_match_table = button_device_ids, + .pm = &acpi_button_pm, + }, +}; + +struct acpi_button { + struct acpi_device *adev; + struct device *dev; /* physical button device */ + unsigned int type; + struct input_dev *input; + const char *class; /* for netlink messages */ + char phys[32]; /* for input device */ + unsigned long pushed; + bool last_state; + ktime_t last_time; + bool suspended; + bool lid_state_initialized; + bool gpe_enabled; +}; + +static long lid_init_state = -1; + +static unsigned long lid_report_interval __read_mostly = 500; +module_param(lid_report_interval, ulong, 0644); +MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); + +/* FS Interface (/proc) */ +static struct proc_dir_entry *acpi_button_dir; +static struct proc_dir_entry *acpi_lid_dir; + +static int acpi_lid_evaluate_state(acpi_handle lid_handle) +{ + unsigned long long lid_state; + acpi_status status; + + status = acpi_evaluate_integer(lid_handle, "_LID", NULL, &lid_state); + if (ACPI_FAILURE(status)) + return -ENODEV; + + return !!lid_state; +} + +static void acpi_lid_notify_state(struct acpi_button *button, bool state) +{ + struct acpi_device *device = button->adev; + ktime_t next_report; + bool do_update; + + /* + * In lid_init_state=ignore mode, if user opens/closes lid + * frequently with "open" missing, and "last_time" is also updated + * frequently, "close" cannot be delivered to the userspace. + * So "last_time" is only updated after a timeout or an actual + * switch. + */ + do_update = lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || + button->last_state != state; + next_report = ktime_add(button->last_time, + ms_to_ktime(lid_report_interval)); + if (button->last_state == state && + ktime_after(ktime_get(), next_report)) { + /* Complain about the buggy firmware. */ + pr_warn_once(FW_BUG "Unexpected lid state reported by firmware\n"); + + /* + * Send the unreliable complement switch event: + * + * On most platforms, the lid device is reliable. However + * there are exceptions: + * 1. Platforms returning initial lid state as "close" by + * default after booting/resuming: + * https://bugzilla.kernel.org/show_bug.cgi?id=89211 + * https://bugzilla.kernel.org/show_bug.cgi?id=106151 + * 2. Platforms never reporting "open" events: + * https://bugzilla.kernel.org/show_bug.cgi?id=106941 + * On these buggy platforms, the usage model of the ACPI + * lid device actually is: + * 1. The initial returning value of _LID may not be + * reliable. + * 2. The open event may not be reliable. + * 3. The close event is reliable. + * + * But SW_LID is typed as input switch event, the input + * layer checks if the event is redundant. Hence if the + * state is not switched, the userspace cannot see this + * platform triggered reliable event. By inserting a + * complement switch event, it then is guaranteed that the + * platform triggered reliable one can always be seen by + * the userspace. + */ + if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { + do_update = true; + /* + * Do generate complement switch event for "close" + * as "close" is reliable and wrong "open" won't + * trigger unexpected behaviors. + * Do not generate complement switch event for + * "open" as "open" is not reliable and wrong + * "close" will trigger unexpected behaviors. + */ + if (!state) { + input_report_switch(button->input, + SW_LID, state); + input_sync(button->input); + } + } + } + /* Send the platform triggered reliable event */ + if (do_update) { + acpi_handle_debug(device->handle, "ACPI LID %s\n", + state ? "open" : "closed"); + input_report_switch(button->input, SW_LID, !state); + input_sync(button->input); + button->last_state = state; + button->last_time = ktime_get(); + } +} + +static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq, + void *offset) +{ + struct acpi_button *button = seq->private; + int state; + + state = acpi_lid_evaluate_state(button->adev->handle); + seq_printf(seq, "state: %s\n", + state < 0 ? "unsupported" : (state ? "open" : "closed")); + return 0; +} + +static int acpi_lid_add_fs(struct acpi_button *button) +{ + struct acpi_device *device = button->adev; + struct proc_dir_entry *entry = NULL; + + if (acpi_button_dir || acpi_lid_dir) { + pr_info("More than one Lid device found!\n"); + return -EEXIST; + } + + /* 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) + 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)) + goto remove_lid_dir; + + /* create /proc/acpi/button/lid/LID/state */ + entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, + acpi_device_dir(device), acpi_button_state_seq_show, + button); + if (!entry) + goto remove_dev_dir; + + return 0; + +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); + acpi_lid_dir = NULL; +remove_button_dir: + remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + acpi_button_dir = NULL; + return -ENODEV; +} + +static void acpi_lid_remove_fs(void *data) +{ + struct acpi_button *button = data; + struct acpi_device *device = button->adev; + + 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); + acpi_lid_dir = NULL; + remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); + acpi_button_dir = NULL; +} + +static int devm_acpi_lid_add_fs(struct device *dev, struct acpi_button *button) +{ + int ret; + + ret = acpi_lid_add_fs(button); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, acpi_lid_remove_fs, button); +} + +static acpi_handle saved_lid_handle; +static DEFINE_MUTEX(acpi_lid_lock); + +static void acpi_lid_save(struct acpi_device *adev) +{ + guard(mutex)(&acpi_lid_lock); + + saved_lid_handle = adev->handle; +} + +static void acpi_lid_forget(struct acpi_device *adev) +{ + guard(mutex)(&acpi_lid_lock); + + if (saved_lid_handle == adev->handle) + saved_lid_handle = NULL; +} + +/* Driver Interface */ +int acpi_lid_open(void) +{ + guard(mutex)(&acpi_lid_lock); + + if (!saved_lid_handle) + return -ENODEV; + + return acpi_lid_evaluate_state(saved_lid_handle); +} +EXPORT_SYMBOL(acpi_lid_open); + +static void acpi_lid_update_state(struct acpi_button *button, bool signal_wakeup) +{ + int state; + + state = acpi_lid_evaluate_state(button->adev->handle); + if (state < 0) + return; + + if (state && signal_wakeup) + acpi_pm_wakeup_event(button->dev); + + acpi_lid_notify_state(button, state); +} + +static void acpi_lid_initialize_state(struct acpi_button *button) +{ + switch (lid_init_state) { + case ACPI_BUTTON_LID_INIT_OPEN: + acpi_lid_notify_state(button, true); + break; + case ACPI_BUTTON_LID_INIT_METHOD: + acpi_lid_update_state(button, false); + break; + case ACPI_BUTTON_LID_INIT_IGNORE: + default: + break; + } + + button->lid_state_initialized = true; +} + +static void acpi_lid_notify(acpi_handle handle, u32 event, void *data) +{ + struct acpi_button *button = data; + struct acpi_device *device = button->adev; + + if (event != ACPI_BUTTON_NOTIFY_STATUS) { + acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", + event); + return; + } + + if (!button->lid_state_initialized) + return; + + acpi_lid_update_state(button, true); +} + +static void acpi_button_notify(acpi_handle handle, u32 event, void *data) +{ + struct acpi_button *button = data; + struct acpi_device *device = button->adev; + struct input_dev *input; + int keycode; + + switch (event) { + case ACPI_BUTTON_NOTIFY_STATUS: + break; + case ACPI_BUTTON_NOTIFY_WAKE: + break; + default: + acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", + event); + return; + } + + acpi_pm_wakeup_event(button->dev); + + if (button->suspended || event == ACPI_BUTTON_NOTIFY_WAKE) + return; + + input = button->input; + 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_netlink_event(button->class, dev_name(&device->dev), + event, ++button->pushed); +} + +static void acpi_button_notify_run(void *data) +{ + acpi_button_notify(NULL, ACPI_BUTTON_NOTIFY_STATUS, data); +} + +static u32 acpi_button_event(void *data) +{ + acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_button_notify_run, data); + return ACPI_INTERRUPT_HANDLED; +} + +#ifdef CONFIG_PM_SLEEP +static int acpi_button_suspend(struct device *dev) +{ + struct acpi_button *button = dev_get_drvdata(dev); + + button->suspended = true; + return 0; +} + +static int acpi_button_resume(struct device *dev) +{ + struct acpi_button *button = dev_get_drvdata(dev); + struct input_dev *input; + + button->suspended = false; + if (button->type == ACPI_BUTTON_TYPE_LID) { + button->last_state = !!acpi_lid_evaluate_state(ACPI_HANDLE(dev)); + button->last_time = ktime_get(); + acpi_lid_initialize_state(button); + } + + if (button->type == ACPI_BUTTON_TYPE_POWER) { + input = button->input; + input_report_key(input, KEY_WAKEUP, 1); + input_sync(input); + input_report_key(input, KEY_WAKEUP, 0); + input_sync(input); + } + return 0; +} +#endif + +static int acpi_lid_input_open(struct input_dev *input) +{ + struct acpi_button *button = input_get_drvdata(input); + + button->last_state = !!acpi_lid_evaluate_state(button->adev->handle); + button->last_time = ktime_get(); + acpi_lid_initialize_state(button); + + return 0; +} + +static acpi_notify_handler acpi_button_notify_handler(struct acpi_button *button) +{ + if (button->type == ACPI_BUTTON_TYPE_LID) + return acpi_lid_notify; + + return acpi_button_notify; +} + +static void acpi_button_wakeup_cleanup(void *data) +{ + device_init_wakeup(data, false); +} + +static int devm_acpi_button_init_wakeup(struct device *dev) +{ + device_init_wakeup(dev, true); + return devm_add_action_or_reset(dev, acpi_button_wakeup_cleanup, dev); +} + +static void acpi_button_remove_event_handler(void *data) +{ + struct acpi_button *button = data; + struct acpi_device *adev = button->adev; + + switch (adev->device_type) { + case ACPI_BUS_TYPE_POWER_BUTTON: + acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, + acpi_button_event); + break; + + case ACPI_BUS_TYPE_SLEEP_BUTTON: + acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, + acpi_button_event); + break; + + default: + if (button->gpe_enabled) { + dev_dbg(button->dev, "Disabling ACPI GPE%02llx\n", + adev->wakeup.gpe_number); + acpi_disable_gpe(adev->wakeup.gpe_device, + adev->wakeup.gpe_number); + } + acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY, + acpi_button_notify_handler(button)); + break; + } + acpi_os_wait_events_complete(); +} + +static int acpi_button_add_fixed_event_handler(u32 event, + struct acpi_button *button) +{ + acpi_status status; + + status = acpi_install_fixed_event_handler(event, acpi_button_event, button); + if (ACPI_FAILURE(status)) + return -ENODEV; + + return 0; +} + +static int acpi_button_add_event_handler(struct acpi_button *button) +{ + struct acpi_device *adev = button->adev; + acpi_status status; + + if (adev->device_type == ACPI_BUS_TYPE_POWER_BUTTON) + return acpi_button_add_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, + button); + + if (adev->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) + return acpi_button_add_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, + button); + + status = acpi_install_notify_handler(adev->handle, ACPI_ALL_NOTIFY, + acpi_button_notify_handler(button), + button); + if (ACPI_FAILURE(status)) + return -ENODEV; + + if (!adev->wakeup.flags.valid) + return 0; + + /* + * If the wakeup GPE has a handler method, enable it in case it is also + * used for signaling runtime events. + */ + status = acpi_enable_gpe_cond(adev->wakeup.gpe_device, + adev->wakeup.gpe_number, + ACPI_GPE_DISPATCH_METHOD); + button->gpe_enabled = ACPI_SUCCESS(status); + if (button->gpe_enabled) + dev_dbg(button->dev, "Enabled ACPI GPE%02llx\n", + adev->wakeup.gpe_number); + + return 0; +} + +static int devm_acpi_button_add_event_handler(struct device *dev, + struct acpi_button *button) +{ + int ret; + + ret = acpi_button_add_event_handler(button); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, acpi_button_remove_event_handler, + button); +} + +static int acpi_button_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct acpi_device *device = ACPI_COMPANION(dev); + const struct acpi_device_id *id; + struct acpi_button *button; + struct input_dev *input; + u8 button_type; + int error = 0; + + id = acpi_match_acpi_device(button_device_ids, device); + if (!id || strcmp(acpi_device_hid(device), id->id)) + return dev_err_probe(dev, -ENODEV, "Unsupported device\n"); + + button_type = id->driver_data; + if (button_type == ACPI_BUTTON_TYPE_LID && + lid_init_state == ACPI_BUTTON_LID_INIT_DISABLED) + return -ENODEV; + + button = devm_kzalloc(dev, sizeof(*button), GFP_KERNEL); + if (!button) + return -ENOMEM; + + platform_set_drvdata(pdev, button); + + button->dev = dev; + button->adev = device; + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + button->input = input; + button->type = button_type; + + switch (button_type) { + case ACPI_BUTTON_TYPE_LID: + button->class = ACPI_BUTTON_CLASS_LID; + + input->name = ACPI_BUTTON_DEVICE_NAME_LID; + input_set_capability(input, EV_SW, SW_LID); + input->open = acpi_lid_input_open; + + error = devm_acpi_lid_add_fs(dev, button); + if (error) + return error; + + break; + + case ACPI_BUTTON_TYPE_POWER: + button->class = ACPI_BUTTON_CLASS_POWER; + + input->name = ACPI_BUTTON_DEVICE_NAME_POWER; + input_set_capability(input, EV_KEY, KEY_POWER); + input_set_capability(input, EV_KEY, KEY_WAKEUP); + break; + + case ACPI_BUTTON_TYPE_SLEEP: + button->class = ACPI_BUTTON_CLASS_SLEEP; + + input->name = ACPI_BUTTON_DEVICE_NAME_SLEEP; + input_set_capability(input, EV_KEY, KEY_SLEEP); + break; + + default: + return dev_err_probe(dev, -ENODEV, "Unrecognized button type\n"); + } + + snprintf(button->phys, sizeof(button->phys), "%s/button/input0", + acpi_device_hid(device)); + + input->phys = button->phys; + input->id.bustype = BUS_HOST; + input->id.product = button_type; + + input_set_drvdata(input, button); + error = input_register_device(input); + if (error) + return error; + + error = devm_acpi_button_init_wakeup(dev); + if (error) + return error; + + error = devm_acpi_button_add_event_handler(dev, button); + if (error) + return error; + + if (button_type == ACPI_BUTTON_TYPE_LID) { + /* + * This assumes there's only one lid device, or if there are + * more we only care about the last one... + */ + acpi_lid_save(device); + } + + pr_info("%s [%s]\n", input->name, acpi_device_bid(device)); + + return 0; +} + +static void acpi_button_remove(struct platform_device *pdev) +{ + struct acpi_button *button = platform_get_drvdata(pdev); + + if (button->type == ACPI_BUTTON_TYPE_LID) + acpi_lid_forget(button->adev); +} + +static int param_set_lid_init_state(const char *val, + const struct kernel_param *kp) +{ + int i; + + i = sysfs_match_string(lid_init_state_str, val); + if (i < 0) + return i; + + lid_init_state = i; + pr_info("Initial lid state set to '%s'\n", lid_init_state_str[i]); + return 0; +} + +static int param_get_lid_init_state(char *buf, const struct kernel_param *kp) +{ + int i, c = 0; + + for (i = 0; i < ARRAY_SIZE(lid_init_state_str); i++) + if (i == lid_init_state) + c += sprintf(buf + c, "[%s] ", lid_init_state_str[i]); + else + c += sprintf(buf + c, "%s ", lid_init_state_str[i]); + + buf[c - 1] = '\n'; /* Replace the final space with a newline */ + + return c; +} + +module_param_call(lid_init_state, + param_set_lid_init_state, param_get_lid_init_state, + NULL, 0644); +MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); + +static int __init acpi_button_init(void) +{ + const struct dmi_system_id *dmi_id; + + if (lid_init_state == -1) { + dmi_id = dmi_first_match(dmi_lid_quirks); + if (dmi_id) + lid_init_state = (long)dmi_id->driver_data; + else + lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; + } + + /* + * Modules such as nouveau.ko and i915.ko have a link time dependency + * on acpi_lid_open(), and would therefore not be loadable on ACPI + * capable kernels booted in non-ACPI mode if the return value of + * platform_driver_register() is returned from here with ACPI disabled + * when this driver is built as a module. + */ + if (acpi_disabled) + return 0; + + return platform_driver_register(&acpi_button_driver); +} + +static void __exit acpi_button_exit(void) +{ + if (!acpi_disabled) + platform_driver_unregister(&acpi_button_driver); +} + +module_init(acpi_button_init); +module_exit(acpi_button_exit); -- cgit v1.3.1