/* * Eee PC WMI hotkey driver * * Copyright(C) 2010 Intel Corporation. * Copyright(C) 2010 Corentin Chary * * Portions based on wistron_btns.c: * Copyright (C) 2005 Miloslav Trmac * Copyright (C) 2005 Bernhard Rosenkraenzer * Copyright (C) 2005 Dmitry Torokhov * * 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 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define EEEPC_WMI_FILE "eeepc-wmi" MODULE_AUTHOR("Yong Wang "); MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver"); MODULE_LICENSE("GPL"); #define EEEPC_ACPI_HID "ASUS010" /* old _HID used in eeepc-laptop */ #define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000" #define EEEPC_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66" MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID); MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID); #define NOTIFY_BRNUP_MIN 0x11 #define NOTIFY_BRNUP_MAX 0x1f #define NOTIFY_BRNDOWN_MIN 0x20 #define NOTIFY_BRNDOWN_MAX 0x2e #define EEEPC_WMI_METHODID_DSTS 0x53544344 #define EEEPC_WMI_METHODID_DEVS 0x53564544 #define EEEPC_WMI_METHODID_CFVS 0x53564643 #define EEEPC_WMI_DEVID_WLAN 0x00010011 #define EEEPC_WMI_DEVID_BLUETOOTH 0x00010013 #define EEEPC_WMI_DEVID_WIMAX 0x00010017 #define EEEPC_WMI_DEVID_WWAN3G 0x00010019 #define EEEPC_WMI_DEVID_BACKLIGHT 0x00050011 #define EEEPC_WMI_DEVID_BRIGHTNESS 0x00050012 #define EEEPC_WMI_DEVID_CAMERA 0x00060013 #define EEEPC_WMI_DEVID_CARDREADER 0x00080013 #define EEEPC_WMI_DEVID_TPDLED 0x00100011 #define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001 #define EEEPC_WMI_DSTS_PRESENCE_BIT 0x00010000 #define EEEPC_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF #define EEEPC_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00 static bool hotplug_wireless; module_param(hotplug_wireless, bool, 0444); MODULE_PARM_DESC(hotplug_wireless, "Enable hotplug for wireless device. " "If your laptop needs that, please report to " "acpi4asus-user@lists.sourceforge.net."); static const struct key_entry eeepc_wmi_keymap[] = { /* Sleep already handled via generic ACPI code */ { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } }, { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } }, { KE_KEY, 0x30, { KEY_VOLUMEUP } }, { KE_KEY, 0x31, { KEY_VOLUMEDOWN } }, { KE_KEY, 0x32, { KEY_MUTE } }, { KE_KEY, 0x5c, { KEY_F15 } }, { KE_KEY, 0x5d, { KEY_WLAN } }, { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */ { KE_KEY, 0x88, { KEY_WLAN } }, { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } }, { KE_KEY, 0xe0, { KEY_PROG1 } }, { KE_KEY, 0xe1, { KEY_F14 } }, { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } }, { KE_END, 0}, }; struct bios_args { u32 dev_id; u32 ctrl_param; }; /* * eeepc-wmi/ - debugfs root directory * dev_id - current dev_id * ctrl_param - current ctrl_param * devs - call DEVS(dev_id, ctrl_param) and print result * dsts - call DSTS(dev_id) and print result */ struct eeepc_wmi_debug { struct dentry *root; u32 dev_id; u32 ctrl_param; }; struct eeepc_wmi { bool hotplug_wireless; struct input_dev *inputdev; struct backlight_device *backlight_device; struct platform_device *platform_device; struct led_classdev tpd_led; int tpd_led_wk; struct workqueue_struct *led_workqueue; struct work_struct tpd_led_work; struct rfkill *wlan_rfkill; struct rfkill *bluetooth_rfkill; struct rfkill *wimax_rfkill; struct rfkill *wwan3g_rfkill; struct hotplug_slot *hotplug_slot; struct mutex hotplug_lock; struct mutex wmi_lock; struct workqueue_struct *hotplug_workqueue; struct work_struct hotplug_work; struct eeepc_wmi_debug debug; }; static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc) { int err; eeepc->inputdev = input_allocate_device(); if (!eeepc->inputdev) return -ENOMEM; eeepc->inputdev->name = "Eee PC WMI hotkeys"; eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0"; eeepc->inputdev->id.bustype = BUS_HOST; eeepc->inputdev->dev.parent = &eeepc->platform_device->dev; err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL); if (err) goto err_free_dev; err = input_register_device(eeepc->inputdev); if (err) goto err_free_keymap; return 0; err_free_keymap: sparse_keymap_free(eeepc->inputdev); err_free_dev: input_free_device(eeepc->inputdev); return err; } static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc) { if (eeepc->inputdev) { sparse_keymap_free(eeepc->inputdev); input_unregister_device(eeepc->inputdev); } eeepc->inputdev = NULL; } static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval) { struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id }; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; acpi_status status; u32 tmp; status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, EEEPC_WMI_METHODID_DSTS, &input, &output); if (ACPI_FAILURE(status)) return status; obj = (union acpi_object *)output.pointer; if (obj && obj->type == ACPI_TYPE_INTEGER) tmp = (u32)obj->integer.value; else tmp = 0; if (retval) *retval = tmp; kfree(obj); return status; } static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval) { struct bios_args args = { .dev_id = dev_id, .ctrl_param = ctrl_param, }; struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; acpi_status status; if (!retval) { status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, EEEPC_WMI_METHODID_DEVS, &input, NULL); } else { struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; u32 tmp; status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, EEEPC_WMI_METHODID_DEVS, &input, &output); if (ACPI_FAILURE(status)) return status; obj = (union acpi_object *)output.pointer; if (obj && obj->type == ACPI_TYPE_INTEGER) tmp = (u32)obj->integer.value; else tmp = 0; *retval = tmp; kfree(obj); } return status; } /* Helper for special devices with magic return codes */ static int eeepc_wmi_get_devstate_bits(u32 dev_id, u32 mask) { u32 retval = 0; acpi_status status; status = eeepc_wmi_get_devstate(dev_id, &retval); if (ACPI_FAILURE(status)) return -EINVAL; if (!(retval & EEEPC_WMI_DSTS_PRESENCE_BIT)) return -ENODEV; return retval & mask; } static int eeepc_wmi_get_devstate_simple(u32 dev_id) { return eeepc_wmi_get_devstate_bits(dev_id, EEEPC_WMI_DSTS_STATUS_BIT); } /* * LEDs */ /* * These functions actually update the LED's, and are called from a * workqueue. By doing this as separate work rather than when the LED * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a * potentially bad time, such as a timer interrupt. */ static void tpd_led_update(struct work_struct *work) { int ctrl_param; struct eeepc_wmi *eeepc; eeepc = container_of(work, struct eeepc_wmi, tpd_led_work); ctrl_param = eeepc->tpd_led_wk; eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL); } static void tpd_led_set(struct led_classdev *led_cdev, enum led_brightness value) { struct eeepc_wmi *eeepc; eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); eeepc->tpd_led_wk = !!value; queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); } static int read_tpd_state(struct eeepc_wmi *eeepc) { return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED); } static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) { struct eeepc_wmi *eeepc; eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led); return read_tpd_state(eeepc); } static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc) { int rv; if (read_tpd_state(eeepc) < 0) return 0; eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); if (!eeepc->led_workqueue) return -ENOMEM; INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); eeepc->tpd_led.name = "eeepc::touchpad"; eeepc->tpd_led.brightness_set = tpd_led_set; eeepc->tpd_led.brightness_get = tpd_led_get; eeepc->tpd_led.max_brightness = 1; rv = led_classdev_register(&eeepc->platform_device->dev, &eeepc->tpd_led); if (rv) { destroy_workqueue(eeepc->led_workqueue); return rv; } return 0; } static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) { if (eeepc->tpd_led.dev) led_classdev_unregister(&eeepc->tpd_led); if (eeepc->led_workqueue) destroy_workqueue(eeepc->led_workqueue); } /* * PCI hotplug (for wlan rfkill) */ static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) { int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); if (result < 0) return false; return !result; } static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc) { struct pci_dev *dev; struct pci_bus *bus; bool blocked; bool absent; u32 l; mutex_lock(&eeepc->wmi_lock); blocked = eeepc_wlan_rfkill_blocked(eeepc); mutex_unlock(&eeepc->wmi_lock); mutex_lock(&eeepc->hotplug_lock); if (eeepc->wlan_rfkill) rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); if (eeepc->hotplug_slot) { bus = pci_find_bus(0, 1); if (!bus) { pr_warning("Unable to find PCI bus 1?\n"); goto out_unlock; } if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { pr_err("Unable to read PCI config space?\n"); goto out_unlock; } absent = (l == 0xffffffff); if (blocked != absent) { pr_warning("BIOS says wireless lan is %s, " "but the pci device is %s\n", blocked ? "blocked" : "unblocked", absent ? "absent" : "present"); pr_warning("skipped wireless hotplug as probably " "inappropriate for this model\n"); goto out_unlock; } if (!blocked) { dev = pci_get_slot(bus, 0); if (dev) { /* Device already present */ pci_dev_put(dev); goto out_unlock; } dev = pci_scan_single_device(bus, 0); if (dev) { pci_bus_assign_resources(bus); if (pci_bus_add_device(dev)) pr_err("Unable to hotplug wifi\n"); } } else { dev = pci_get_slot(bus, 0); if (dev) { pci_remove_bus_device(dev); pci_dev_put(dev); } } } out_unlock: mutex_unlock(&eeepc->hotplug_lock); } static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) { struct eeepc_wmi *eeepc = data; if (event != ACPI_NOTIFY_BUS_CHECK) return; /* * We can't call directly eeepc_rfkill_hotplug because most * of the time WMBC is still being executed and not reetrant. * There is currently no way to tell ACPICA that we want this * method to be serialized, we schedule a eeepc_rfkill_hotplug * call later, in a safer context. */ queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work); } static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc, char *node) { acpi_status status; acpi_handle handle; status = acpi_get_handle(NULL, node, &handle); if (ACPI_SUCCESS(status)) { status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, eeepc_rfkill_notify, eeepc); if (ACPI_FAILURE(status)) pr_warning("Failed to register notify on %s\n", node); } else return -ENODEV; return 0; } static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, char *node) { acpi_status status = AE_OK; acpi_handle handle; status = acpi_get_handle(NULL, node, &handle); if (ACPI_SUCCESS(status)) { status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, eeepc_rfkill_notify); if (ACPI_FAILURE(status)) pr_err("Error removing rfkill notify handler %s\n", node); } } static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); if (result < 0) return result; *value = !!result; return 0; } static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) { kfree(hotplug_slot->info); kfree(hotplug_slot); } static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { .owner = THIS_MODULE, .get_adapter_status = eeepc_get_adapter_status, .get_power_status = eeepc_get_adapter_status, }; static void eeepc_hotplug_work(struct work_struct *work) { struct eeepc_wmi *eeepc; eeepc = container_of(work, struct eeepc_wmi, hotplug_work); eeepc_rfkill_hotplug(eeepc); } static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc) { int ret = -ENOMEM; struct pci_bus *bus = pci_find_bus(0, 1); if (!bus) { pr_err("Unable to find wifi PCI bus\n"); return -ENODEV; } eeepc->hotplug_workqueue = create_singlethread_workqueue("hotplug_workqueue"); if (!eeepc->hotplug_workqueue) goto error_workqueue; INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work); eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); if (!eeepc->hotplug_slot) goto error_slot; eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); if (!eeepc->hotplug_slot->info) goto error_info; eeepc->hotplug_slot->private = eeepc; eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; eeepc_get_adapter_status(eeepc->hotplug_slot, &eeepc->hotplug_slot->info->adapter_status); ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); if (ret) { pr_err("Unable to register hotplug slot - %d\n", ret); goto error_register; } return 0; error_register: kfree(eeepc->hotplug_slot->info); error_info: kfree(eeepc->hotplug_slot); eeepc->hotplug_slot = NULL; error_slot: destroy_workqueue(eeepc->hotplug_workqueue); error_workqueue: return ret; } /* * Rfkill devices */ static int eeepc_rfkill_set(void *data, bool blocked) { int dev_id = (unsigned long)data; u32 ctrl_param = !blocked; acpi_status status; status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL); if (ACPI_FAILURE(status)) return -EIO; return 0; } static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) { int dev_id = (unsigned long)data; int result; result = eeepc_wmi_get_devstate_simple(dev_id); if (result < 0) return ; rfkill_set_sw_state(rfkill, !result); } static int eeepc_rfkill_wlan_set(void *data, bool blocked) { struct eeepc_wmi *eeepc = data; int ret; /* * This handler is enabled only if hotplug is enabled. * In this case, the eeepc_wmi_set_devstate() will * trigger a wmi notification and we need to wait * this call to finish before being able to call * any wmi method */ mutex_lock(&eeepc->wmi_lock); ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked); mutex_unlock(&eeepc->wmi_lock); return ret; } static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data) { eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN); } static const struct rfkill_ops eeepc_rfkill_wlan_ops = { .set_block = eeepc_rfkill_wlan_set, .query = eeepc_rfkill_wlan_query, }; static const struct rfkill_ops eeepc_rfkill_ops = { .set_block = eeepc_rfkill_set, .query = eeepc_rfkill_query, }; static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, struct rfkill **rfkill, const char *name, enum rfkill_type type, int dev_id) { int result = eeepc_wmi_get_devstate_simple(dev_id); if (result < 0) return result; if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, &eeepc_rfkill_wlan_ops, eeepc); else *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, &eeepc_rfkill_ops, (void *)(long)dev_id); if (!*rfkill) return -EINVAL; rfkill_init_sw_state(*rfkill, !result); result = rfkill_register(*rfkill); if (result) { rfkill_destroy(*rfkill); *rfkill = NULL; return result; } return 0; } static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc) { eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); if (eeepc->wlan_rfkill) { rfkill_unregister(eeepc->wlan_rfkill); rfkill_destroy(eeepc->wlan_rfkill); eeepc->wlan_rfkill = NULL; } /* * Refresh pci hotplug in case the rfkill state was changed after * eeepc_unregister_rfkill_notifier() */ eeepc_rfkill_hotplug(eeepc); if (eeepc->hotplug_slot) pci_hp_deregister(eeepc->hotplug_slot); if (eeepc->hotplug_workqueue) destroy_workqueue(eeepc->hotplug_workqueue); if (eeepc->bluetooth_rfkill) { rfkill_unregister(eeepc->bluetooth_rfkill); rfkill_destroy(eeepc->bluetooth_rfkill); eeepc->bluetooth_rfkill = NULL; } if (eeepc->wimax_rfkill) { rfkill_unregister(eeepc->wimax_rfkill); rfkill_destroy(eeepc->wimax_rfkill); eeepc->wimax_rfkill = NULL; } if (eeepc->wwan3g_rfkill) { rfkill_unregister(eeepc->wwan3g_rfkill); rfkill_destroy(eeepc->wwan3g_rfkill); eeepc->wwan3g_rfkill = NULL; } } static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc) { int result = 0; mutex_init(&eeepc->hotplug_lock); mutex_init(&eeepc->wmi_lock); result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, "eeepc-wlan", RFKILL_TYPE_WLAN, EEEPC_WMI_DEVID_WLAN); if (result && result != -ENODEV) goto exit; result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, EEEPC_WMI_DEVID_BLUETOOTH); if (result && result != -ENODEV) goto exit; result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, "eeepc-wimax", RFKILL_TYPE_WIMAX, EEEPC_WMI_DEVID_WIMAX); if (result && result != -ENODEV) goto exit; result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, "eeepc-wwan3g", RFKILL_TYPE_WWAN, EEEPC_WMI_DEVID_WWAN3G); if (result && result != -ENODEV) goto exit; if (!eeepc->hotplug_wireless) goto exit; result = eeepc_setup_pci_hotplug(eeepc); /* * If we get -EBUSY then something else is handling the PCI hotplug - * don't fail in this case */ if (result == -EBUSY) result = 0; eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); /* * Refresh pci hotplug in case the rfkill state was changed during * setup. */ eeepc_rfkill_hotplug(eeepc); exit: if (result && result != -ENODEV) eeepc_wmi_rfkill_exit(eeepc); if (result == -ENODEV) result = 0; return result; } /* * Backlight */ static int read_backlight_power(void) { int ret = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BACKLIGHT); if (ret < 0) return ret; return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; } static int read_brightness(struct backlight_device *bd) { u32 retval; acpi_status status; status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, &retval); if (ACPI_FAILURE(status)) return -EIO; else return retval & EEEPC_WMI_DSTS_BRIGHTNESS_MASK; } static int update_bl_status(struct backlight_device *bd) { u32 ctrl_param; acpi_status status; int power; ctrl_param = bd->props.brightness; status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, ctrl_param, NULL); if (ACPI_FAILURE(status)) return -EIO; power = read_backlight_power(); if (power != -ENODEV && bd->props.power != power) { ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK); status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, ctrl_param, NULL); if (ACPI_FAILURE(status)) return -EIO; } return 0; } static const struct backlight_ops eeepc_wmi_bl_ops = { .get_brightness = read_brightness, .update_status = update_bl_status, }; static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) { struct backlight_device *bd = eeepc->backlight_device; int old = bd->props.brightness; int new = old; if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) new = code - NOTIFY_BRNUP_MIN + 1; else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) new = code - NOTIFY_BRNDOWN_MIN; bd->props.brightness = new; backlight_update_status(bd); backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); return old; } static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) { struct backlight_device *bd; struct backlight_properties props; int max; int power; max = eeepc_wmi_get_devstate_bits(EEEPC_WMI_DEVID_BRIGHTNESS, EEEPC_WMI_DSTS_MAX_BRIGTH_MASK); power = read_backlight_power(); if (max < 0 && power < 0) { /* Try to keep the original error */ if (max == -ENODEV && power == -ENODEV) return -ENODEV; if (max != -ENODEV) return max; else return power; } if (max == -ENODEV) max = 0; if (power == -ENODEV) power = FB_BLANK_UNBLANK; memset(&props, 0, sizeof(struct backlight_properties)); props.max_brightness = max; bd = backlight_device_register(EEEPC_WMI_FILE, &eeepc->platform_device->dev, eeepc, &eeepc_wmi_bl_ops, &props); if (IS_ERR(bd)) { pr_err("Could not register backlight device\n"); return PTR_ERR(bd); } eeepc->backlight_device = bd; bd->props.brightness = read_brightness(bd); bd->props.power = power; backlight_update_status(bd); return 0; } static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) { if (eeepc->backlight_device) backlight_device_unregister(eeepc->backlight_device); eeepc->backlight_device = NULL; } static void eeepc_wmi_notify(u32 value, void *context) { struct eeepc_wmi *eeepc = context; struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; acpi_status status; int code; int orig_code; status = wmi_get_event_data(value, &response); if (status != AE_OK) { pr_err("bad event status 0x%x\n", status); return; } obj = (union acpi_object *)response.pointer; if (obj && obj->type == ACPI_TYPE_INTEGER) { code = obj->integer.value; orig_code = code; if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) code = NOTIFY_BRNUP_MIN; else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) code = NOTIFY_BRNDOWN_MIN; if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { if (!acpi_video_backlight_support()) eeepc_wmi_backlight_notify(eeepc, orig_code); } if (!sparse_keymap_report_event(eeepc->inputdev, code, 1, true)) pr_info("Unknown key %x pressed\n", code); } kfree(obj); } /* * Sys helpers */ static int parse_arg(const char *buf, unsigned long count, int *val) { if (!count) return 0; if (sscanf(buf, "%i", val) != 1) return -EINVAL; return count; } static ssize_t store_sys_wmi(int devid, const char *buf, size_t count) { acpi_status status; u32 retval; int rv, value; value = eeepc_wmi_get_devstate_simple(devid); if (value == -ENODEV) /* Check device presence */ return value; rv = parse_arg(buf, count, &value); status = eeepc_wmi_set_devstate(devid, value, &retval); if (ACPI_FAILURE(status)) return -EIO; return rv; } static ssize_t show_sys_wmi(int devid, char *buf) { int value = eeepc_wmi_get_devstate_simple(devid); if (value < 0) return value; return sprintf(buf, "%d\n", value); } #define EEEPC_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ static ssize_t show_##_name(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ return show_sys_wmi(_cm, buf); \ } \ static ssize_t store_##_name(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t count) \ { \ return store_sys_wmi(_cm, buf, count); \ } \ static struct device_attribute dev_attr_##_name = { \ .attr = { \ .name = __stringify(_name), \ .mode = _mode }, \ .show = show_##_name, \ .store = store_##_name, \ } EEEPC_WMI_CREATE_DEVICE_ATTR(camera, 0644, EEEPC_WMI_DEVID_CAMERA); EEEPC_WMI_CREATE_DEVICE_ATTR(cardr, 0644, EEEPC_WMI_DEVID_CARDREADER); static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int value; struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; acpi_status status; if (!count || sscanf(buf, "%i", &value) != 1) return -EINVAL; if (value < 0 || value > 2) return -EINVAL; status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); if (ACPI_FAILURE(status)) return -EIO; else return count; } static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); static struct attribute *platform_attributes[] = { &dev_attr_cpufv.attr, &dev_attr_camera.attr, &dev_attr_cardr.attr, NULL }; static mode_t eeepc_sysfs_is_visible(struct kobject *kobj, struct attribute *attr, int idx) { bool supported = true; int devid = -1; if (attr == &dev_attr_camera.attr) devid = EEEPC_WMI_DEVID_CAMERA; else if (attr == &dev_attr_cardr.attr) devid = EEEPC_WMI_DEVID_CARDREADER; if (devid != -1) supported = eeepc_wmi_get_devstate_simple(devid) != -ENODEV; return supported ? attr->mode : 0; } static struct attribute_group platform_attribute_group = { .is_visible = eeepc_sysfs_is_visible, .attrs = platform_attributes }; static void eeepc_wmi_sysfs_exit(struct platform_device *device) { sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); } static int eeepc_wmi_sysfs_init(struct platform_device *device) { return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); } /* * Platform device */ static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc) { return eeepc_wmi_sysfs_init(eeepc->platform_device); } static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc) { eeepc_wmi_sysfs_exit(eeepc->platform_device); } /* * debugfs */ struct eeepc_wmi_debugfs_node { struct eeepc_wmi *eeepc; char *name; int (*show)(struct seq_file *m, void *data); }; static int show_dsts(struct seq_file *m, void *data) { struct eeepc_wmi *eeepc = m->private; acpi_status status; u32 retval = -1; status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval); if (ACPI_FAILURE(status)) return -EIO; seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval); return 0; } static int show_devs(struct seq_file *m, void *data) { struct eeepc_wmi *eeepc = m->private; acpi_status status; u32 retval = -1; status = eeepc_wmi_set_devstate(eeepc->debug.dev_id, eeepc->debug.ctrl_param, &retval); if (ACPI_FAILURE(status)) return -EIO; seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id, eeepc->debug.ctrl_param, retval); return 0; } static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = { { NULL, "devs", show_devs }, { NULL, "dsts", show_dsts }, }; static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file) { struct eeepc_wmi_debugfs_node *node = inode->i_private; return single_open(file, node->show, node->eeepc); } static const struct file_operations eeepc_wmi_debugfs_io_ops = { .owner = THIS_MODULE, .open = eeepc_wmi_debugfs_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc) { debugfs_remove_recursive(eeepc->debug.root); } static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc) { struct dentry *dent; int i; eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL); if (!eeepc->debug.root) { pr_err("failed to create debugfs directory"); goto error_debugfs; } dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR, eeepc->debug.root, &eeepc->debug.dev_id); if (!dent) goto error_debugfs; dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR, eeepc->debug.root, &eeepc->debug.ctrl_param); if (!dent) goto error_debugfs; for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) { struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i]; node->eeepc = eeepc; dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, eeepc->debug.root, node, &eeepc_wmi_debugfs_io_ops); if (!dent) { pr_err("failed to create debug file: %s\n", node->name); goto error_debugfs; } } return 0; error_debugfs: eeepc_wmi_debugfs_exit(eeepc); return -ENOMEM; } /* * WMI Driver */ static void eeepc_dmi_check(struct eeepc_wmi *eeepc) { const char *model; model = dmi_get_system_info(DMI_PRODUCT_NAME); if (!model) return; /* * Whitelist for wlan hotplug * * Eeepc 1000H needs the current hotplug code to handle * Fn+F2 correctly. We may add other Eeepc here later, but * it seems that most of the laptops supported by eeepc-wmi * don't need to be on this list */ if (strcmp(model, "1000H") == 0) { eeepc->hotplug_wireless = true; pr_info("wlan hotplug enabled\n"); } } static int __init eeepc_wmi_add(struct platform_device *pdev) { struct eeepc_wmi *eeepc; acpi_status status; int err; eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL); if (!eeepc) return -ENOMEM; eeepc->platform_device = pdev; platform_set_drvdata(eeepc->platform_device, eeepc); eeepc->hotplug_wireless = hotplug_wireless; eeepc_dmi_check(eeepc); err = eeepc_wmi_platform_init(eeepc); if (err) goto fail_platform; err = eeepc_wmi_input_init(eeepc); if (err) goto fail_input; err = eeepc_wmi_led_init(eeepc); if (err) goto fail_leds; err = eeepc_wmi_rfkill_init(eeepc); if (err) goto fail_rfkill; if (!acpi_video_backlight_support()) { err = eeepc_wmi_backlight_init(eeepc); if (err && err != -ENODEV) goto fail_backlight; } else pr_info("Backlight controlled by ACPI video driver\n"); status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, eeepc_wmi_notify, eeepc); if (ACPI_FAILURE(status)) { pr_err("Unable to register notify handler - %d\n", status); err = -ENODEV; goto fail_wmi_handler; } err = eeepc_wmi_debugfs_init(eeepc); if (err) goto fail_debugfs; return 0; fail_debugfs: wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); fail_wmi_handler: eeepc_wmi_backlight_exit(eeepc); fail_backlight: eeepc_wmi_rfkill_exit(eeepc); fail_rfkill: eeepc_wmi_led_exit(eeepc); fail_leds: eeepc_wmi_input_exit(eeepc); fail_input: eeepc_wmi_platform_exit(eeepc); fail_platform: kfree(eeepc); return err; } static int __exit eeepc_wmi_remove(struct platform_device *device) { struct eeepc_wmi *eeepc; eeepc = platform_get_drvdata(device); wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); eeepc_wmi_backlight_exit(eeepc); eeepc_wmi_input_exit(eeepc); eeepc_wmi_led_exit(eeepc); eeepc_wmi_rfkill_exit(eeepc); eeepc_wmi_debugfs_exit(eeepc); eeepc_wmi_platform_exit(eeepc); kfree(eeepc); return 0; } /* * Platform driver - hibernate/resume callbacks */ static int eeepc_hotk_thaw(struct device *device) { struct eeepc_wmi *eeepc = dev_get_drvdata(device); if (eeepc->wlan_rfkill) { bool wlan; /* * Work around bios bug - acpi _PTS turns off the wireless led * during suspend. Normally it restores it on resume, but * we should kick it ourselves in case hibernation is aborted. */ wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL); } return 0; } static int eeepc_hotk_restore(struct device *device) { struct eeepc_wmi *eeepc = dev_get_drvdata(device); int bl; /* Refresh both wlan rfkill state and pci hotplug */ if (eeepc->wlan_rfkill) eeepc_rfkill_hotplug(eeepc); if (eeepc->bluetooth_rfkill) { bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH); rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl); } if (eeepc->wimax_rfkill) { bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WIMAX); rfkill_set_sw_state(eeepc->wimax_rfkill, bl); } if (eeepc->wwan3g_rfkill) { bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G); rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl); } return 0; } static const struct dev_pm_ops eeepc_pm_ops = { .thaw = eeepc_hotk_thaw, .restore = eeepc_hotk_restore, }; static struct platform_driver platform_driver = { .remove = __exit_p(eeepc_wmi_remove), .driver = { .name = EEEPC_WMI_FILE, .owner = THIS_MODULE, .pm = &eeepc_pm_ops, }, }; static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level, void *context, void **retval) { pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID); *(bool *)context = true; return AE_CTRL_TERMINATE; } static int __init eeepc_wmi_check_atkd(void) { acpi_status status; bool found = false; status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device, &found, NULL); if (ACPI_FAILURE(status) || !found) return 0; return -1; } static int __init eeepc_wmi_probe(struct platform_device *pdev) { if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { pr_warning("No known WMI GUID found\n"); return -ENODEV; } if (eeepc_wmi_check_atkd()) { pr_warning("WMI device present, but legacy ATKD device is also " "present and enabled."); pr_warning("You probably booted with acpi_osi=\"Linux\" or " "acpi_osi=\"!Windows 2009\""); pr_warning("Can't load eeepc-wmi, use default acpi_osi " "(preferred) or eeepc-laptop"); return -ENODEV; } return eeepc_wmi_add(pdev); } static struct platform_device *platform_device; static int __init eeepc_wmi_init(void) { platform_device = platform_create_bundle(&platform_driver, eeepc_wmi_probe, NULL, 0, NULL, 0); if (IS_ERR(platform_device)) return PTR_ERR(platform_device); return 0; } static void __exit eeepc_wmi_exit(void) { platform_device_unregister(platform_device); platform_driver_unregister(&platform_driver); } module_init(eeepc_wmi_init); module_exit(eeepc_wmi_exit);