/* * HP WMI hotkeys * * Copyright (C) 2008 Red Hat * * 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 */ #include #include #include #include #include #include #include #include #include #include #include MODULE_AUTHOR("Matthew Garrett "); MODULE_DESCRIPTION("HP laptop WMI hotkeys driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C"); MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C" #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4" #define HPWMI_DISPLAY_QUERY 0x1 #define HPWMI_HDDTEMP_QUERY 0x2 #define HPWMI_ALS_QUERY 0x3 #define HPWMI_HARDWARE_QUERY 0x4 #define HPWMI_WIRELESS_QUERY 0x5 #define HPWMI_HOTKEY_QUERY 0xc #define PREFIX "HP WMI: " #define UNIMP "Unimplemented " enum hp_wmi_radio { HPWMI_WIFI = 0, HPWMI_BLUETOOTH = 1, HPWMI_WWAN = 2, }; enum hp_wmi_event_ids { HPWMI_DOCK_EVENT = 1, HPWMI_PARK_HDD = 2, HPWMI_SMART_ADAPTER = 3, HPWMI_BEZEL_BUTTON = 4, HPWMI_WIRELESS = 5, HPWMI_CPU_BATTERY_THROTTLE = 6, HPWMI_LOCK_SWITCH = 7, }; static int __devinit hp_wmi_bios_setup(struct platform_device *device); static int __exit hp_wmi_bios_remove(struct platform_device *device); static int hp_wmi_resume_handler(struct device *device); struct bios_args { u32 signature; u32 command; u32 commandtype; u32 datasize; u32 data; }; struct bios_return { u32 sigpass; u32 return_code; }; enum hp_return_value { HPWMI_RET_WRONG_SIGNATURE = 0x02, HPWMI_RET_UNKNOWN_COMMAND = 0x03, HPWMI_RET_UNKNOWN_CMDTYPE = 0x04, HPWMI_RET_INVALID_PARAMETERS = 0x05, }; static const struct key_entry hp_wmi_keymap[] = { { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } }, { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } }, { KE_KEY, 0x20e6, { KEY_PROG1 } }, { KE_KEY, 0x20e8, { KEY_MEDIA } }, { KE_KEY, 0x2142, { KEY_MEDIA } }, { KE_KEY, 0x213b, { KEY_INFO } }, { KE_KEY, 0x2169, { KEY_DIRECTION } }, { KE_KEY, 0x231b, { KEY_HELP } }, { KE_END, 0 } }; static struct input_dev *hp_wmi_input_dev; static struct platform_device *hp_wmi_platform_dev; static struct rfkill *wifi_rfkill; static struct rfkill *bluetooth_rfkill; static struct rfkill *wwan_rfkill; static const struct dev_pm_ops hp_wmi_pm_ops = { .resume = hp_wmi_resume_handler, .restore = hp_wmi_resume_handler, }; static struct platform_driver hp_wmi_driver = { .driver = { .name = "hp-wmi", .owner = THIS_MODULE, .pm = &hp_wmi_pm_ops, }, .probe = hp_wmi_bios_setup, .remove = hp_wmi_bios_remove, }; /* * hp_wmi_perform_query * * query: The commandtype -> What should be queried * write: The command -> 0 read, 1 write, 3 ODM specific * buffer: Buffer used as input and/or output * insize: Size of input buffer * outsize: Size of output buffer * * returns zero on success * an HP WMI query specific error code (which is positive) * -EINVAL if the query was not successful at all * -EINVAL if the output buffer size exceeds buffersize * * Note: The buffersize must at least be the maximum of the input and output * size. E.g. Battery info query (0x7) is defined to have 1 byte input * and 128 byte output. The caller would do: * buffer = kzalloc(128, GFP_KERNEL); * ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128) */ static int hp_wmi_perform_query(int query, int write, void *buffer, int insize, int outsize) { struct bios_return *bios_return; int actual_outsize; union acpi_object *obj; struct bios_args args = { .signature = 0x55434553, .command = write ? 0x2 : 0x1, .commandtype = query, .datasize = insize, .data = 0, }; struct acpi_buffer input = { sizeof(struct bios_args), &args }; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; if (WARN_ON(insize > sizeof(args.data))) return -EINVAL; memcpy(&args.data, buffer, insize); wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output); obj = output.pointer; if (!obj) return -EINVAL; else if (obj->type != ACPI_TYPE_BUFFER) { kfree(obj); return -EINVAL; } bios_return = (struct bios_return *)obj->buffer.pointer; if (bios_return->return_code) { if (bios_return->return_code != HPWMI_RET_UNKNOWN_CMDTYPE) printk(KERN_WARNING PREFIX "query 0x%x returned " "error 0x%x\n", query, bios_return->return_code); kfree(obj); return bios_return->return_code; } if (!outsize) { /* ignore output data */ kfree(obj); return 0; } actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return))); memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize); memset(buffer + actual_outsize, 0, outsize - actual_outsize); kfree(obj); return 0; } static int hp_wmi_display_state(void) { int state = 0; int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state, sizeof(state), sizeof(state)); if (ret) return -EINVAL; return state; } static int hp_wmi_hddtemp_state(void) { int state = 0; int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state, sizeof(state), sizeof(state)); if (ret) return -EINVAL; return state; } static int hp_wmi_als_state(void) { int state = 0; int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state, sizeof(state), sizeof(state)); if (ret) return -EINVAL; return state; } static int hp_wmi_dock_state(void) { int state = 0; int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state, sizeof(state), sizeof(state)); if (ret) return -EINVAL; return state & 0x1; } static int hp_wmi_tablet_state(void) { int state = 0; int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state, sizeof(state), sizeof(state)); if (ret) return ret; return (state & 0x4) ? 1 : 0; } static int hp_wmi_set_block(void *data, bool blocked) { enum hp_wmi_radio r = (enum hp_wmi_radio) data; int query = BIT(r + 8) | ((!blocked) << r); int ret; ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, &query, sizeof(query), 0); if (ret) return -EINVAL; return 0; } static const struct rfkill_ops hp_wmi_rfkill_ops = { .set_block = hp_wmi_set_block, }; static bool hp_wmi_get_sw_state(enum hp_wmi_radio r) { int wireless = 0; int mask; hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless, sizeof(wireless), sizeof(wireless)); /* TBD: Pass error */ mask = 0x200 << (r * 8); if (wireless & mask) return false; else return true; } static bool hp_wmi_get_hw_state(enum hp_wmi_radio r) { int wireless = 0; int mask; hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless, sizeof(wireless), sizeof(wireless)); /* TBD: Pass error */ mask = 0x800 << (r * 8); if (wireless & mask) return false; else return true; } static ssize_t show_display(struct device *dev, struct device_attribute *attr, char *buf) { int value = hp_wmi_display_state(); if (value < 0) return -EINVAL; return sprintf(buf, "%d\n", value); } static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr, char *buf) { int value = hp_wmi_hddtemp_state(); if (value < 0) return -EINVAL; return sprintf(buf, "%d\n", value); } static ssize_t show_als(struct device *dev, struct device_attribute *attr, char *buf) { int value = hp_wmi_als_state(); if (value < 0) return -EINVAL; return sprintf(buf, "%d\n", value); } static ssize_t show_dock(struct device *dev, struct device_attribute *attr, char *buf) { int value = hp_wmi_dock_state(); if (value < 0) return -EINVAL; return sprintf(buf, "%d\n", value); } static ssize_t show_tablet(struct device *dev, struct device_attribute *attr, char *buf) { int value = hp_wmi_tablet_state(); if (value < 0) return -EINVAL; return sprintf(buf, "%d\n", value); } static ssize_t set_als(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { u32 tmp = simple_strtoul(buf, NULL, 10); int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp, sizeof(tmp), sizeof(tmp)); if (ret) return -EINVAL; return count; } static DEVICE_ATTR(display, S_IRUGO, show_display, NULL); static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL); static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als); static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL); static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL); static void hp_wmi_notify(u32 value, void *context) { struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; u32 event_id, event_data; int key_code = 0, ret; u32 *location; acpi_status status; status = wmi_get_event_data(value, &response); if (status != AE_OK) { printk(KERN_INFO PREFIX "bad event status 0x%x\n", status); return; } obj = (union acpi_object *)response.pointer; if (!obj) return; if (obj->type != ACPI_TYPE_BUFFER) { printk(KERN_INFO "hp-wmi: Unknown response received %d\n", obj->type); kfree(obj); return; } /* * Depending on ACPI version the concatenation of id and event data * inside _WED function will result in a 8 or 16 byte buffer. */ location = (u32 *)obj->buffer.pointer; if (obj->buffer.length == 8) { event_id = *location; event_data = *(location + 1); } else if (obj->buffer.length == 16) { event_id = *location; event_data = *(location + 2); } else { printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n", obj->buffer.length); kfree(obj); return; } kfree(obj); switch (event_id) { case HPWMI_DOCK_EVENT: input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state()); input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, hp_wmi_tablet_state()); input_sync(hp_wmi_input_dev); break; case HPWMI_PARK_HDD: break; case HPWMI_SMART_ADAPTER: break; case HPWMI_BEZEL_BUTTON: ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0, &key_code, sizeof(key_code), sizeof(key_code)); if (ret) break; if (!sparse_keymap_report_event(hp_wmi_input_dev, key_code, 1, true)) printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n", key_code); break; case HPWMI_WIRELESS: if (wifi_rfkill) rfkill_set_states(wifi_rfkill, hp_wmi_get_sw_state(HPWMI_WIFI), hp_wmi_get_hw_state(HPWMI_WIFI)); if (bluetooth_rfkill) rfkill_set_states(bluetooth_rfkill, hp_wmi_get_sw_state(HPWMI_BLUETOOTH), hp_wmi_get_hw_state(HPWMI_BLUETOOTH)); if (wwan_rfkill) rfkill_set_states(wwan_rfkill, hp_wmi_get_sw_state(HPWMI_WWAN), hp_wmi_get_hw_state(HPWMI_WWAN)); break; case HPWMI_CPU_BATTERY_THROTTLE: printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell" " battery event detected\n"); break; case HPWMI_LOCK_SWITCH: break; default: printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n", event_id, event_data); break; } } static int __init hp_wmi_input_setup(void) { acpi_status status; int err; hp_wmi_input_dev = input_allocate_device(); if (!hp_wmi_input_dev) return -ENOMEM; hp_wmi_input_dev->name = "HP WMI hotkeys"; hp_wmi_input_dev->phys = "wmi/input0"; hp_wmi_input_dev->id.bustype = BUS_HOST; __set_bit(EV_SW, hp_wmi_input_dev->evbit); __set_bit(SW_DOCK, hp_wmi_input_dev->swbit); __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit); err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL); if (err) goto err_free_dev; /* Set initial hardware state */ input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state()); input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, hp_wmi_tablet_state()); input_sync(hp_wmi_input_dev); status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL); if (ACPI_FAILURE(status)) { err = -EIO; goto err_free_keymap; } err = input_register_device(hp_wmi_input_dev); if (err) goto err_uninstall_notifier; return 0; err_uninstall_notifier: wmi_remove_notify_handler(HPWMI_EVENT_GUID); err_free_keymap: sparse_keymap_free(hp_wmi_input_dev); err_free_dev: input_free_device(hp_wmi_input_dev); return err; } static void hp_wmi_input_destroy(void) { wmi_remove_notify_handler(HPWMI_EVENT_GUID); sparse_keymap_free(hp_wmi_input_dev); input_unregister_device(hp_wmi_input_dev); } static void cleanup_sysfs(struct platform_device *device) { device_remove_file(&device->dev, &dev_attr_display); device_remove_file(&device->dev, &dev_attr_hddtemp); device_remove_file(&device->dev, &dev_attr_als); device_remove_file(&device->dev, &dev_attr_dock); device_remove_file(&device->dev, &dev_attr_tablet); } static int __devinit hp_wmi_bios_setup(struct platform_device *device) { int err; int wireless = 0; err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless, sizeof(wireless), sizeof(wireless)); if (err) return err; err = device_create_file(&device->dev, &dev_attr_display); if (err) goto add_sysfs_error; err = device_create_file(&device->dev, &dev_attr_hddtemp); if (err) goto add_sysfs_error; err = device_create_file(&device->dev, &dev_attr_als); if (err) goto add_sysfs_error; err = device_create_file(&device->dev, &dev_attr_dock); if (err) goto add_sysfs_error; err = device_create_file(&device->dev, &dev_attr_tablet); if (err) goto add_sysfs_error; if (wireless & 0x1) { wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev, RFKILL_TYPE_WLAN, &hp_wmi_rfkill_ops, (void *) HPWMI_WIFI); rfkill_init_sw_state(wifi_rfkill, hp_wmi_get_sw_state(HPWMI_WIFI)); rfkill_set_hw_state(wifi_rfkill, hp_wmi_get_hw_state(HPWMI_WIFI)); err = rfkill_register(wifi_rfkill); if (err) goto register_wifi_error; } if (wireless & 0x2) { bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev, RFKILL_TYPE_BLUETOOTH, &hp_wmi_rfkill_ops, (void *) HPWMI_BLUETOOTH); rfkill_init_sw_state(bluetooth_rfkill, hp_wmi_get_sw_state(HPWMI_BLUETOOTH)); rfkill_set_hw_state(bluetooth_rfkill, hp_wmi_get_hw_state(HPWMI_BLUETOOTH)); err = rfkill_register(bluetooth_rfkill); if (err) goto register_bluetooth_error; } if (wireless & 0x4) { wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev, RFKILL_TYPE_WWAN, &hp_wmi_rfkill_ops, (void *) HPWMI_WWAN); rfkill_init_sw_state(wwan_rfkill, hp_wmi_get_sw_state(HPWMI_WWAN)); rfkill_set_hw_state(wwan_rfkill, hp_wmi_get_hw_state(HPWMI_WWAN)); err = rfkill_register(wwan_rfkill); if (err) goto register_wwan_err; } return 0; register_wwan_err: rfkill_destroy(wwan_rfkill); if (bluetooth_rfkill) rfkill_unregister(bluetooth_rfkill); register_bluetooth_error: rfkill_destroy(bluetooth_rfkill); if (wifi_rfkill) rfkill_unregister(wifi_rfkill); register_wifi_error: rfkill_destroy(wifi_rfkill); add_sysfs_error: cleanup_sysfs(device); return err; } static int __exit hp_wmi_bios_remove(struct platform_device *device) { cleanup_sysfs(device); if (wifi_rfkill) { rfkill_unregister(wifi_rfkill); rfkill_destroy(wifi_rfkill); } if (bluetooth_rfkill) { rfkill_unregister(bluetooth_rfkill); rfkill_destroy(bluetooth_rfkill); } if (wwan_rfkill) { rfkill_unregister(wwan_rfkill); rfkill_destroy(wwan_rfkill); } return 0; } static int hp_wmi_resume_handler(struct device *device) { /* * Hardware state may have changed while suspended, so trigger * input events for the current state. As this is a switch, * the input layer will only actually pass it on if the state * changed. */ if (hp_wmi_input_dev) { input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state()); input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, hp_wmi_tablet_state()); input_sync(hp_wmi_input_dev); } if (wifi_rfkill) rfkill_set_states(wifi_rfkill, hp_wmi_get_sw_state(HPWMI_WIFI), hp_wmi_get_hw_state(HPWMI_WIFI)); if (bluetooth_rfkill) rfkill_set_states(bluetooth_rfkill, hp_wmi_get_sw_state(HPWMI_BLUETOOTH), hp_wmi_get_hw_state(HPWMI_BLUETOOTH)); if (wwan_rfkill) rfkill_set_states(wwan_rfkill, hp_wmi_get_sw_state(HPWMI_WWAN), hp_wmi_get_hw_state(HPWMI_WWAN)); return 0; } static int __init hp_wmi_init(void) { int err; int event_capable = wmi_has_guid(HPWMI_EVENT_GUID); int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID); if (event_capable) { err = hp_wmi_input_setup(); if (err) return err; } if (bios_capable) { err = platform_driver_register(&hp_wmi_driver); if (err) goto err_driver_reg; hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1); if (!hp_wmi_platform_dev) { err = -ENOMEM; goto err_device_alloc; } err = platform_device_add(hp_wmi_platform_dev); if (err) goto err_device_add; } if (!bios_capable && !event_capable) return -ENODEV; return 0; err_device_add: platform_device_put(hp_wmi_platform_dev); err_device_alloc: platform_driver_unregister(&hp_wmi_driver); err_driver_reg: if (event_capable) hp_wmi_input_destroy(); return err; } static void __exit hp_wmi_exit(void) { if (wmi_has_guid(HPWMI_EVENT_GUID)) hp_wmi_input_destroy(); if (hp_wmi_platform_dev) { platform_device_unregister(hp_wmi_platform_dev); platform_driver_unregister(&hp_wmi_driver); } } module_init(hp_wmi_init); module_exit(hp_wmi_exit);