diff options
Diffstat (limited to 'drivers/platform/x86/dell-wmi.c')
| -rw-r--r-- | drivers/platform/x86/dell-wmi.c | 335 |
1 files changed, 197 insertions, 138 deletions
diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c index 0f900cc9fa7..390e8e33d5e 100644 --- a/drivers/platform/x86/dell-wmi.c +++ b/drivers/platform/x86/dell-wmi.c @@ -23,14 +23,18 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> +#include <linux/slab.h> #include <linux/types.h> #include <linux/input.h> -#include <acpi/acpi_drivers.h> +#include <linux/input/sparse-keymap.h> #include <linux/acpi.h> #include <linux/string.h> +#include <linux/dmi.h> MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver"); @@ -38,15 +42,9 @@ MODULE_LICENSE("GPL"); #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492" -MODULE_ALIAS("wmi:"DELL_EVENT_GUID); - -struct key_entry { - char type; /* See KE_* below */ - u16 code; - u16 keycode; -}; +static int acpi_video; -enum { KE_KEY, KE_SW, KE_IGNORE, KE_END }; +MODULE_ALIAS("wmi:"DELL_EVENT_GUID); /* * Certain keys are flagged as KE_IGNORE. All of these are either @@ -54,205 +52,266 @@ enum { KE_KEY, KE_SW, KE_IGNORE, KE_END }; * via the keyboard controller so should not be sent again. */ -static struct key_entry dell_wmi_keymap[] = { - {KE_KEY, 0xe045, KEY_PROG1}, - {KE_KEY, 0xe009, KEY_EJECTCD}, +static const struct key_entry dell_wmi_legacy_keymap[] __initconst = { + { KE_IGNORE, 0x003a, { KEY_CAPSLOCK } }, + + { KE_KEY, 0xe045, { KEY_PROG1 } }, + { KE_KEY, 0xe009, { KEY_EJECTCD } }, /* These also contain the brightness level at offset 6 */ - {KE_KEY, 0xe006, KEY_BRIGHTNESSUP}, - {KE_KEY, 0xe005, KEY_BRIGHTNESSDOWN}, + { KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } }, + { KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } }, /* Battery health status button */ - {KE_KEY, 0xe007, KEY_BATTERY}, + { KE_KEY, 0xe007, { KEY_BATTERY } }, /* This is actually for all radios. Although physically a * switch, the notification does not provide an indication of * state and so it should be reported as a key */ - {KE_KEY, 0xe008, KEY_WLAN}, + { KE_KEY, 0xe008, { KEY_WLAN } }, /* The next device is at offset 6, the active devices are at offset 8 and the attached devices at offset 10 */ - {KE_KEY, 0xe00b, KEY_DISPLAYTOGGLE}, + { KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } }, - {KE_IGNORE, 0xe00c, KEY_KBDILLUMTOGGLE}, + { KE_IGNORE, 0xe00c, { KEY_KBDILLUMTOGGLE } }, /* BIOS error detected */ - {KE_IGNORE, 0xe00d, KEY_RESERVED}, + { KE_IGNORE, 0xe00d, { KEY_RESERVED } }, /* Wifi Catcher */ - {KE_KEY, 0xe011, KEY_PROG2}, + { KE_KEY, 0xe011, {KEY_PROG2 } }, /* Ambient light sensor toggle */ - {KE_IGNORE, 0xe013, KEY_RESERVED}, - - {KE_IGNORE, 0xe020, KEY_MUTE}, - {KE_IGNORE, 0xe02e, KEY_VOLUMEDOWN}, - {KE_IGNORE, 0xe030, KEY_VOLUMEUP}, - {KE_IGNORE, 0xe033, KEY_KBDILLUMUP}, - {KE_IGNORE, 0xe034, KEY_KBDILLUMDOWN}, - {KE_IGNORE, 0xe03a, KEY_CAPSLOCK}, - {KE_IGNORE, 0xe045, KEY_NUMLOCK}, - {KE_IGNORE, 0xe046, KEY_SCROLLLOCK}, - {KE_END, 0} + { KE_IGNORE, 0xe013, { KEY_RESERVED } }, + + { KE_IGNORE, 0xe020, { KEY_MUTE } }, + + /* Shortcut and audio panel keys */ + { KE_IGNORE, 0xe025, { KEY_RESERVED } }, + { KE_IGNORE, 0xe026, { KEY_RESERVED } }, + + { KE_IGNORE, 0xe02e, { KEY_VOLUMEDOWN } }, + { KE_IGNORE, 0xe030, { KEY_VOLUMEUP } }, + { KE_IGNORE, 0xe033, { KEY_KBDILLUMUP } }, + { KE_IGNORE, 0xe034, { KEY_KBDILLUMDOWN } }, + { KE_IGNORE, 0xe03a, { KEY_CAPSLOCK } }, + { KE_IGNORE, 0xe045, { KEY_NUMLOCK } }, + { KE_IGNORE, 0xe046, { KEY_SCROLLLOCK } }, + { KE_IGNORE, 0xe0f7, { KEY_MUTE } }, + { KE_IGNORE, 0xe0f8, { KEY_VOLUMEDOWN } }, + { KE_IGNORE, 0xe0f9, { KEY_VOLUMEUP } }, + { KE_END, 0 } }; -static struct input_dev *dell_wmi_input_dev; - -static struct key_entry *dell_wmi_get_entry_by_scancode(int code) -{ - struct key_entry *key; +static bool dell_new_hk_type; - for (key = dell_wmi_keymap; key->type != KE_END; key++) - if (code == key->code) - return key; +struct dell_bios_keymap_entry { + u16 scancode; + u16 keycode; +}; - return NULL; -} +struct dell_bios_hotkey_table { + struct dmi_header header; + struct dell_bios_keymap_entry keymap[]; -static struct key_entry *dell_wmi_get_entry_by_keycode(int keycode) -{ - struct key_entry *key; +}; - for (key = dell_wmi_keymap; key->type != KE_END; key++) - if (key->type == KE_KEY && keycode == key->keycode) - return key; +static const struct dell_bios_hotkey_table *dell_bios_hotkey_table; + +static const u16 bios_to_linux_keycode[256] __initconst = { + + KEY_MEDIA, KEY_NEXTSONG, KEY_PLAYPAUSE, KEY_PREVIOUSSONG, + KEY_STOPCD, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, + KEY_WWW, KEY_UNKNOWN, KEY_VOLUMEDOWN, KEY_MUTE, + KEY_VOLUMEUP, KEY_UNKNOWN, KEY_BATTERY, KEY_EJECTCD, + KEY_UNKNOWN, KEY_SLEEP, KEY_PROG1, KEY_BRIGHTNESSDOWN, + KEY_BRIGHTNESSUP, KEY_UNKNOWN, KEY_KBDILLUMTOGGLE, + KEY_UNKNOWN, KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, + KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, KEY_PROG2, + KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, + KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_MICMUTE, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_PROG3 +}; - return NULL; -} +static struct input_dev *dell_wmi_input_dev; -static int dell_wmi_getkeycode(struct input_dev *dev, int scancode, - int *keycode) +static void dell_wmi_notify(u32 value, void *context) { - struct key_entry *key = dell_wmi_get_entry_by_scancode(scancode); + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + acpi_status status; - if (key && key->type == KE_KEY) { - *keycode = key->keycode; - return 0; + status = wmi_get_event_data(value, &response); + if (status != AE_OK) { + pr_info("bad event status 0x%x\n", status); + return; } - return -EINVAL; -} + obj = (union acpi_object *)response.pointer; -static int dell_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) -{ - struct key_entry *key; - int old_keycode; - - if (keycode < 0 || keycode > KEY_MAX) - return -EINVAL; - - key = dell_wmi_get_entry_by_scancode(scancode); - if (key && key->type == KE_KEY) { - old_keycode = key->keycode; - key->keycode = keycode; - set_bit(keycode, dev->keybit); - if (!dell_wmi_get_entry_by_keycode(old_keycode)) - clear_bit(old_keycode, dev->keybit); - return 0; + if (obj && obj->type == ACPI_TYPE_BUFFER) { + const struct key_entry *key; + int reported_key; + u16 *buffer_entry = (u16 *)obj->buffer.pointer; + + if (dell_new_hk_type && (buffer_entry[1] != 0x10)) { + pr_info("Received unknown WMI event (0x%x)\n", + buffer_entry[1]); + kfree(obj); + return; + } + + if (dell_new_hk_type || buffer_entry[1] == 0x0) + reported_key = (int)buffer_entry[2]; + else + reported_key = (int)buffer_entry[1] & 0xffff; + + key = sparse_keymap_entry_from_scancode(dell_wmi_input_dev, + reported_key); + if (!key) { + pr_info("Unknown key %x pressed\n", reported_key); + } else if ((key->keycode == KEY_BRIGHTNESSUP || + key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) { + /* Don't report brightness notifications that will also + * come via ACPI */ + ; + } else { + sparse_keymap_report_entry(dell_wmi_input_dev, key, + 1, true); + } } - return -EINVAL; + kfree(obj); } -static void dell_wmi_notify(u32 value, void *context) +static const struct key_entry * __init dell_wmi_prepare_new_keymap(void) { - struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; - static struct key_entry *key; - union acpi_object *obj; - - wmi_get_event_data(value, &response); + int hotkey_num = (dell_bios_hotkey_table->header.length - 4) / + sizeof(struct dell_bios_keymap_entry); + struct key_entry *keymap; + int i; + + keymap = kcalloc(hotkey_num + 1, sizeof(struct key_entry), GFP_KERNEL); + if (!keymap) + return NULL; + + for (i = 0; i < hotkey_num; i++) { + const struct dell_bios_keymap_entry *bios_entry = + &dell_bios_hotkey_table->keymap[i]; + keymap[i].type = KE_KEY; + keymap[i].code = bios_entry->scancode; + keymap[i].keycode = bios_entry->keycode < 256 ? + bios_to_linux_keycode[bios_entry->keycode] : + KEY_RESERVED; + } - obj = (union acpi_object *)response.pointer; + keymap[hotkey_num].type = KE_END; - if (obj && obj->type == ACPI_TYPE_BUFFER) { - int *buffer = (int *)obj->buffer.pointer; - /* - * The upper bytes of the event may contain - * additional information, so mask them off for the - * scancode lookup - */ - key = dell_wmi_get_entry_by_scancode(buffer[1] & 0xFFFF); - if (key) { - input_report_key(dell_wmi_input_dev, key->keycode, 1); - input_sync(dell_wmi_input_dev); - input_report_key(dell_wmi_input_dev, key->keycode, 0); - input_sync(dell_wmi_input_dev); - } else if (buffer[1] & 0xFFFF) - printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n", - buffer[1] & 0xFFFF); - } + return keymap; } static int __init dell_wmi_input_setup(void) { - struct key_entry *key; int err; dell_wmi_input_dev = input_allocate_device(); - if (!dell_wmi_input_dev) return -ENOMEM; dell_wmi_input_dev->name = "Dell WMI hotkeys"; dell_wmi_input_dev->phys = "wmi/input0"; dell_wmi_input_dev->id.bustype = BUS_HOST; - dell_wmi_input_dev->getkeycode = dell_wmi_getkeycode; - dell_wmi_input_dev->setkeycode = dell_wmi_setkeycode; - - for (key = dell_wmi_keymap; key->type != KE_END; key++) { - switch (key->type) { - case KE_KEY: - set_bit(EV_KEY, dell_wmi_input_dev->evbit); - set_bit(key->keycode, dell_wmi_input_dev->keybit); - break; - case KE_SW: - set_bit(EV_SW, dell_wmi_input_dev->evbit); - set_bit(key->keycode, dell_wmi_input_dev->swbit); - break; + + if (dell_new_hk_type) { + const struct key_entry *keymap = dell_wmi_prepare_new_keymap(); + if (!keymap) { + err = -ENOMEM; + goto err_free_dev; } - } - err = input_register_device(dell_wmi_input_dev); + err = sparse_keymap_setup(dell_wmi_input_dev, keymap, NULL); - if (err) { - input_free_device(dell_wmi_input_dev); - return err; + /* + * Sparse keymap library makes a copy of keymap so we + * don't need the original one that was allocated. + */ + kfree(keymap); + } else { + err = sparse_keymap_setup(dell_wmi_input_dev, + dell_wmi_legacy_keymap, NULL); } + if (err) + goto err_free_dev; + + err = input_register_device(dell_wmi_input_dev); + if (err) + goto err_free_keymap; return 0; + + err_free_keymap: + sparse_keymap_free(dell_wmi_input_dev); + err_free_dev: + input_free_device(dell_wmi_input_dev); + return err; +} + +static void dell_wmi_input_destroy(void) +{ + sparse_keymap_free(dell_wmi_input_dev); + input_unregister_device(dell_wmi_input_dev); +} + +static void __init find_hk_type(const struct dmi_header *dm, void *dummy) +{ + if (dm->type == 0xb2 && dm->length > 6) { + dell_new_hk_type = true; + dell_bios_hotkey_table = + container_of(dm, struct dell_bios_hotkey_table, header); + } } static int __init dell_wmi_init(void) { int err; + acpi_status status; - if (wmi_has_guid(DELL_EVENT_GUID)) { - err = dell_wmi_input_setup(); + if (!wmi_has_guid(DELL_EVENT_GUID)) { + pr_warn("No known WMI GUID found\n"); + return -ENODEV; + } - if (err) - return err; + dmi_walk(find_hk_type, NULL); + acpi_video = acpi_video_backlight_support(); - err = wmi_install_notify_handler(DELL_EVENT_GUID, - dell_wmi_notify, NULL); - if (err) { - input_unregister_device(dell_wmi_input_dev); - printk(KERN_ERR "dell-wmi: Unable to register" - " notify handler - %d\n", err); - return err; - } + err = dell_wmi_input_setup(); + if (err) + return err; - } else - printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n"); + status = wmi_install_notify_handler(DELL_EVENT_GUID, + dell_wmi_notify, NULL); + if (ACPI_FAILURE(status)) { + dell_wmi_input_destroy(); + pr_err("Unable to register notify handler - %d\n", status); + return -ENODEV; + } return 0; } +module_init(dell_wmi_init); static void __exit dell_wmi_exit(void) { - if (wmi_has_guid(DELL_EVENT_GUID)) { - wmi_remove_notify_handler(DELL_EVENT_GUID); - input_unregister_device(dell_wmi_input_dev); - } + wmi_remove_notify_handler(DELL_EVENT_GUID); + dell_wmi_input_destroy(); } - -module_init(dell_wmi_init); module_exit(dell_wmi_exit); |