M: Matthew Garrett <mjg59@srcf.ucam.org>
M: Pali Rohár <pali@kernel.org>
S: Maintained
-F: drivers/platform/x86/dell/dell-wmi.c
+F: drivers/platform/x86/dell/dell-wmi-base.c
DELTA ST MEDIA DRIVER
M: Hugues Fruchet <hugues.fruchet@foss.st.com>
dell-smbios-$(CONFIG_DELL_SMBIOS_SMM) += dell-smbios-smm.o
obj-$(CONFIG_DELL_SMO8800) += dell-smo8800.o
obj-$(CONFIG_DELL_WMI) += dell-wmi.o
+dell-wmi-objs := dell-wmi-base.o
obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o
obj-$(CONFIG_DELL_WMI_DESCRIPTOR) += dell-wmi-descriptor.o
obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Dell WMI hotkeys
+ *
+ * Copyright (C) 2008 Red Hat <mjg@redhat.com>
+ * Copyright (C) 2014-2015 Pali Rohár <pali@kernel.org>
+ *
+ * Portions based on wistron_btns.c:
+ * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
+ * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
+ * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
+ */
+
+#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 <linux/input/sparse-keymap.h>
+#include <linux/acpi.h>
+#include <linux/string.h>
+#include <linux/dmi.h>
+#include <linux/wmi.h>
+#include <acpi/video.h>
+#include "dell-smbios.h"
+#include "dell-wmi-descriptor.h"
+
+MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
+MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
+MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
+MODULE_LICENSE("GPL");
+
+#define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
+
+static bool wmi_requires_smbios_request;
+
+struct dell_wmi_priv {
+ struct input_dev *input_dev;
+ u32 interface_version;
+};
+
+static int __init dmi_matched(const struct dmi_system_id *dmi)
+{
+ wmi_requires_smbios_request = 1;
+ return 1;
+}
+
+static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = {
+ {
+ .callback = dmi_matched,
+ .ident = "Dell Inspiron M5110",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
+ },
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Dell Vostro V131",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
+ },
+ },
+ { }
+};
+
+/*
+ * Keymap for WMI events of type 0x0000
+ *
+ * Certain keys are flagged as KE_IGNORE. All of these are either
+ * notifications (rather than requests for change) or are also sent
+ * via the keyboard controller so should not be sent again.
+ */
+static const struct key_entry dell_wmi_keymap_type_0000[] = {
+ { KE_IGNORE, 0x003a, { KEY_CAPSLOCK } },
+
+ /* Key code is followed by brightness level */
+ { KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } },
+ { KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } },
+
+ /* Battery health status button */
+ { KE_KEY, 0xe007, { KEY_BATTERY } },
+
+ /* Radio devices state change, key code is followed by other values */
+ { KE_IGNORE, 0xe008, { KEY_RFKILL } },
+
+ { KE_KEY, 0xe009, { KEY_EJECTCD } },
+
+ /* Key code is followed by: next, active and attached devices */
+ { KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } },
+
+ /* Key code is followed by keyboard illumination level */
+ { KE_IGNORE, 0xe00c, { KEY_KBDILLUMTOGGLE } },
+
+ /* BIOS error detected */
+ { KE_IGNORE, 0xe00d, { KEY_RESERVED } },
+
+ /* Battery was removed or inserted */
+ { KE_IGNORE, 0xe00e, { KEY_RESERVED } },
+
+ /* Wifi Catcher */
+ { KE_KEY, 0xe011, { KEY_WLAN } },
+
+ /* Ambient light sensor toggle */
+ { KE_IGNORE, 0xe013, { KEY_RESERVED } },
+
+ { KE_IGNORE, 0xe020, { KEY_MUTE } },
+
+ /* Unknown, defined in ACPI DSDT */
+ /* { KE_IGNORE, 0xe023, { KEY_RESERVED } }, */
+
+ /* Untested, Dell Instant Launch key on Inspiron 7520 */
+ /* { KE_IGNORE, 0xe024, { KEY_RESERVED } }, */
+
+ /* Dell Instant Launch key */
+ { KE_KEY, 0xe025, { KEY_PROG4 } },
+
+ /* Audio panel key */
+ { KE_IGNORE, 0xe026, { KEY_RESERVED } },
+
+ /* LCD Display On/Off Control key */
+ { KE_KEY, 0xe027, { KEY_DISPLAYTOGGLE } },
+
+ /* Untested, Multimedia key on Dell Vostro 3560 */
+ /* { KE_IGNORE, 0xe028, { KEY_RESERVED } }, */
+
+ /* Dell Instant Launch key */
+ { KE_KEY, 0xe029, { KEY_PROG4 } },
+
+ /* Untested, Windows Mobility Center button on Inspiron 7520 */
+ /* { KE_IGNORE, 0xe02a, { KEY_RESERVED } }, */
+
+ /* Unknown, defined in ACPI DSDT */
+ /* { KE_IGNORE, 0xe02b, { KEY_RESERVED } }, */
+
+ /* Untested, Dell Audio With Preset Switch button on Inspiron 7520 */
+ /* { KE_IGNORE, 0xe02c, { 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 } },
+
+ /* NIC Link is Up */
+ { KE_IGNORE, 0xe043, { KEY_RESERVED } },
+
+ /* NIC Link is Down */
+ { KE_IGNORE, 0xe044, { KEY_RESERVED } },
+
+ /*
+ * This entry is very suspicious!
+ * Originally Matthew Garrett created this dell-wmi driver specially for
+ * "button with a picture of a battery" which has event code 0xe045.
+ * Later Mario Limonciello from Dell told us that event code 0xe045 is
+ * reported by Num Lock and should be ignored because key is send also
+ * by keyboard controller.
+ * So for now we will ignore this event to prevent potential double
+ * Num Lock key press.
+ */
+ { KE_IGNORE, 0xe045, { KEY_NUMLOCK } },
+
+ /* Scroll lock and also going to tablet mode on portable devices */
+ { KE_IGNORE, 0xe046, { KEY_SCROLLLOCK } },
+
+ /* Untested, going from tablet mode on portable devices */
+ /* { KE_IGNORE, 0xe047, { KEY_RESERVED } }, */
+
+ /* Dell Support Center key */
+ { KE_IGNORE, 0xe06e, { KEY_RESERVED } },
+
+ { KE_IGNORE, 0xe0f7, { KEY_MUTE } },
+ { KE_IGNORE, 0xe0f8, { KEY_VOLUMEDOWN } },
+ { KE_IGNORE, 0xe0f9, { KEY_VOLUMEUP } },
+};
+
+struct dell_bios_keymap_entry {
+ u16 scancode;
+ u16 keycode;
+};
+
+struct dell_bios_hotkey_table {
+ struct dmi_header header;
+ struct dell_bios_keymap_entry keymap[];
+
+};
+
+struct dell_dmi_results {
+ int err;
+ int keymap_size;
+ struct key_entry *keymap;
+};
+
+/* Uninitialized entries here are KEY_RESERVED == 0. */
+static const u16 bios_to_linux_keycode[256] = {
+ [0] = KEY_MEDIA,
+ [1] = KEY_NEXTSONG,
+ [2] = KEY_PLAYPAUSE,
+ [3] = KEY_PREVIOUSSONG,
+ [4] = KEY_STOPCD,
+ [5] = KEY_UNKNOWN,
+ [6] = KEY_UNKNOWN,
+ [7] = KEY_UNKNOWN,
+ [8] = KEY_WWW,
+ [9] = KEY_UNKNOWN,
+ [10] = KEY_VOLUMEDOWN,
+ [11] = KEY_MUTE,
+ [12] = KEY_VOLUMEUP,
+ [13] = KEY_UNKNOWN,
+ [14] = KEY_BATTERY,
+ [15] = KEY_EJECTCD,
+ [16] = KEY_UNKNOWN,
+ [17] = KEY_SLEEP,
+ [18] = KEY_PROG1,
+ [19] = KEY_BRIGHTNESSDOWN,
+ [20] = KEY_BRIGHTNESSUP,
+ [21] = KEY_BRIGHTNESS_AUTO,
+ [22] = KEY_KBDILLUMTOGGLE,
+ [23] = KEY_UNKNOWN,
+ [24] = KEY_SWITCHVIDEOMODE,
+ [25] = KEY_UNKNOWN,
+ [26] = KEY_UNKNOWN,
+ [27] = KEY_SWITCHVIDEOMODE,
+ [28] = KEY_UNKNOWN,
+ [29] = KEY_UNKNOWN,
+ [30] = KEY_PROG2,
+ [31] = KEY_UNKNOWN,
+ [32] = KEY_UNKNOWN,
+ [33] = KEY_UNKNOWN,
+ [34] = KEY_UNKNOWN,
+ [35] = KEY_UNKNOWN,
+ [36] = KEY_UNKNOWN,
+ [37] = KEY_UNKNOWN,
+ [38] = KEY_MICMUTE,
+ [255] = KEY_PROG3,
+};
+
+/*
+ * Keymap for WMI events of type 0x0010
+ *
+ * These are applied if the 0xB2 DMI hotkey table is present and doesn't
+ * override them.
+ */
+static const struct key_entry dell_wmi_keymap_type_0010[] = {
+ /* Fn-lock switched to function keys */
+ { KE_IGNORE, 0x0, { KEY_RESERVED } },
+
+ /* Fn-lock switched to multimedia keys */
+ { KE_IGNORE, 0x1, { KEY_RESERVED } },
+
+ /* Keyboard backlight change notification */
+ { KE_IGNORE, 0x3f, { KEY_RESERVED } },
+
+ /* Backlight brightness level */
+ { KE_KEY, 0x57, { KEY_BRIGHTNESSDOWN } },
+ { KE_KEY, 0x58, { KEY_BRIGHTNESSUP } },
+
+ /* Mic mute */
+ { KE_KEY, 0x150, { KEY_MICMUTE } },
+
+ /* Fn-lock */
+ { KE_IGNORE, 0x151, { KEY_RESERVED } },
+
+ /* Change keyboard illumination */
+ { KE_IGNORE, 0x152, { KEY_KBDILLUMTOGGLE } },
+
+ /*
+ * Radio disable (notify only -- there is no model for which the
+ * WMI event is supposed to trigger an action).
+ */
+ { KE_IGNORE, 0x153, { KEY_RFKILL } },
+
+ /* RGB keyboard backlight control */
+ { KE_IGNORE, 0x154, { KEY_RESERVED } },
+
+ /*
+ * Stealth mode toggle. This will "disable all lights and sounds".
+ * The action is performed by the BIOS and EC; the WMI event is just
+ * a notification. On the XPS 13 9350, this is Fn+F7, and there's
+ * a BIOS setting to enable and disable the hotkey.
+ */
+ { KE_IGNORE, 0x155, { KEY_RESERVED } },
+
+ /* Rugged magnetic dock attach/detach events */
+ { KE_IGNORE, 0x156, { KEY_RESERVED } },
+ { KE_IGNORE, 0x157, { KEY_RESERVED } },
+
+ /* Rugged programmable (P1/P2/P3 keys) */
+ { KE_KEY, 0x850, { KEY_PROG1 } },
+ { KE_KEY, 0x851, { KEY_PROG2 } },
+ { KE_KEY, 0x852, { KEY_PROG3 } },
+
+ /*
+ * Radio disable (notify only -- there is no model for which the
+ * WMI event is supposed to trigger an action).
+ */
+ { KE_IGNORE, 0xe008, { KEY_RFKILL } },
+
+ /* Fn-lock */
+ { KE_IGNORE, 0xe035, { KEY_RESERVED } },
+};
+
+/*
+ * Keymap for WMI events of type 0x0011
+ */
+static const struct key_entry dell_wmi_keymap_type_0011[] = {
+ /* Battery unplugged */
+ { KE_IGNORE, 0xfff0, { KEY_RESERVED } },
+
+ /* Battery inserted */
+ { KE_IGNORE, 0xfff1, { KEY_RESERVED } },
+
+ /*
+ * Detachable keyboard detached / undocked
+ * Note SW_TABLET_MODE is already reported through the intel_vbtn
+ * driver for this, so we ignore it.
+ */
+ { KE_IGNORE, 0xfff2, { KEY_RESERVED } },
+
+ /* Detachable keyboard attached / docked */
+ { KE_IGNORE, 0xfff3, { KEY_RESERVED } },
+
+ /* Keyboard backlight level changed */
+ { KE_IGNORE, KBD_LED_OFF_TOKEN, { KEY_RESERVED } },
+ { KE_IGNORE, KBD_LED_ON_TOKEN, { KEY_RESERVED } },
+ { KE_IGNORE, KBD_LED_AUTO_TOKEN, { KEY_RESERVED } },
+ { KE_IGNORE, KBD_LED_AUTO_25_TOKEN, { KEY_RESERVED } },
+ { KE_IGNORE, KBD_LED_AUTO_50_TOKEN, { KEY_RESERVED } },
+ { KE_IGNORE, KBD_LED_AUTO_75_TOKEN, { KEY_RESERVED } },
+ { KE_IGNORE, KBD_LED_AUTO_100_TOKEN, { KEY_RESERVED } },
+};
+
+/*
+ * Keymap for WMI events of type 0x0012
+ * They are events with extended data
+ */
+static const struct key_entry dell_wmi_keymap_type_0012[] = {
+ /* Fn-lock button pressed */
+ { KE_IGNORE, 0xe035, { KEY_RESERVED } },
+};
+
+static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code)
+{
+ struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+ const struct key_entry *key;
+
+ key = sparse_keymap_entry_from_scancode(priv->input_dev,
+ (type << 16) | code);
+ if (!key) {
+ pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n",
+ type, code);
+ return;
+ }
+
+ pr_debug("Key with type 0x%04x and code 0x%04x pressed\n", type, code);
+
+ /* Don't report brightness notifications that will also come via ACPI */
+ if ((key->keycode == KEY_BRIGHTNESSUP ||
+ key->keycode == KEY_BRIGHTNESSDOWN) &&
+ acpi_video_handles_brightness_key_presses())
+ return;
+
+ if (type == 0x0000 && code == 0xe025 && !wmi_requires_smbios_request)
+ return;
+
+ if (key->keycode == KEY_KBDILLUMTOGGLE)
+ dell_laptop_call_notifier(
+ DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, NULL);
+
+ sparse_keymap_report_entry(priv->input_dev, key, 1, true);
+}
+
+static void dell_wmi_notify(struct wmi_device *wdev,
+ union acpi_object *obj)
+{
+ struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+ u16 *buffer_entry, *buffer_end;
+ acpi_size buffer_size;
+ int len, i;
+
+ if (obj->type != ACPI_TYPE_BUFFER) {
+ pr_warn("bad response type %x\n", obj->type);
+ return;
+ }
+
+ pr_debug("Received WMI event (%*ph)\n",
+ obj->buffer.length, obj->buffer.pointer);
+
+ buffer_entry = (u16 *)obj->buffer.pointer;
+ buffer_size = obj->buffer.length/2;
+ buffer_end = buffer_entry + buffer_size;
+
+ /*
+ * BIOS/ACPI on devices with WMI interface version 0 does not clear
+ * buffer before filling it. So next time when BIOS/ACPI send WMI event
+ * which is smaller as previous then it contains garbage in buffer from
+ * previous event.
+ *
+ * BIOS/ACPI on devices with WMI interface version 1 clears buffer and
+ * sometimes send more events in buffer at one call.
+ *
+ * So to prevent reading garbage from buffer we will process only first
+ * one event on devices with WMI interface version 0.
+ */
+ if (priv->interface_version == 0 && buffer_entry < buffer_end)
+ if (buffer_end > buffer_entry + buffer_entry[0] + 1)
+ buffer_end = buffer_entry + buffer_entry[0] + 1;
+
+ while (buffer_entry < buffer_end) {
+
+ len = buffer_entry[0];
+ if (len == 0)
+ break;
+
+ len++;
+
+ if (buffer_entry + len > buffer_end) {
+ pr_warn("Invalid length of WMI event\n");
+ break;
+ }
+
+ pr_debug("Process buffer (%*ph)\n", len*2, buffer_entry);
+
+ switch (buffer_entry[1]) {
+ case 0x0000: /* One key pressed or event occurred */
+ case 0x0012: /* Event with extended data occurred */
+ if (len > 2)
+ dell_wmi_process_key(wdev, buffer_entry[1],
+ buffer_entry[2]);
+ /* Extended data is currently ignored */
+ break;
+ case 0x0010: /* Sequence of keys pressed */
+ case 0x0011: /* Sequence of events occurred */
+ for (i = 2; i < len; ++i)
+ dell_wmi_process_key(wdev, buffer_entry[1],
+ buffer_entry[i]);
+ break;
+ default: /* Unknown event */
+ pr_info("Unknown WMI event type 0x%x\n",
+ (int)buffer_entry[1]);
+ break;
+ }
+
+ buffer_entry += len;
+
+ }
+
+}
+
+static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ if (keymap[i].code == scancode)
+ return true;
+
+ return false;
+}
+
+static void handle_dmi_entry(const struct dmi_header *dm, void *opaque)
+{
+ struct dell_dmi_results *results = opaque;
+ struct dell_bios_hotkey_table *table;
+ int hotkey_num, i, pos = 0;
+ struct key_entry *keymap;
+
+ if (results->err || results->keymap)
+ return; /* We already found the hotkey table. */
+
+ /* The Dell hotkey table is type 0xB2. Scan until we find it. */
+ if (dm->type != 0xb2)
+ return;
+
+ table = container_of(dm, struct dell_bios_hotkey_table, header);
+
+ hotkey_num = (table->header.length -
+ sizeof(struct dell_bios_hotkey_table)) /
+ sizeof(struct dell_bios_keymap_entry);
+ if (hotkey_num < 1) {
+ /*
+ * Historically, dell-wmi would ignore a DMI entry of
+ * fewer than 7 bytes. Sizes between 4 and 8 bytes are
+ * nonsensical (both the header and all entries are 4
+ * bytes), so we approximate the old behavior by
+ * ignoring tables with fewer than one entry.
+ */
+ return;
+ }
+
+ keymap = kcalloc(hotkey_num, sizeof(struct key_entry), GFP_KERNEL);
+ if (!keymap) {
+ results->err = -ENOMEM;
+ return;
+ }
+
+ for (i = 0; i < hotkey_num; i++) {
+ const struct dell_bios_keymap_entry *bios_entry =
+ &table->keymap[i];
+
+ /* Uninitialized entries are 0 aka KEY_RESERVED. */
+ u16 keycode = (bios_entry->keycode <
+ ARRAY_SIZE(bios_to_linux_keycode)) ?
+ bios_to_linux_keycode[bios_entry->keycode] :
+ (bios_entry->keycode == 0xffff ? KEY_UNKNOWN : KEY_RESERVED);
+
+ /*
+ * Log if we find an entry in the DMI table that we don't
+ * understand. If this happens, we should figure out what
+ * the entry means and add it to bios_to_linux_keycode.
+ */
+ if (keycode == KEY_RESERVED) {
+ pr_info("firmware scancode 0x%x maps to unrecognized keycode 0x%x\n",
+ bios_entry->scancode, bios_entry->keycode);
+ continue;
+ }
+
+ if (keycode == KEY_KBDILLUMTOGGLE)
+ keymap[pos].type = KE_IGNORE;
+ else
+ keymap[pos].type = KE_KEY;
+ keymap[pos].code = bios_entry->scancode;
+ keymap[pos].keycode = keycode;
+
+ pos++;
+ }
+
+ results->keymap = keymap;
+ results->keymap_size = pos;
+}
+
+static int dell_wmi_input_setup(struct wmi_device *wdev)
+{
+ struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+ struct dell_dmi_results dmi_results = {};
+ struct key_entry *keymap;
+ int err, i, pos = 0;
+
+ priv->input_dev = input_allocate_device();
+ if (!priv->input_dev)
+ return -ENOMEM;
+
+ priv->input_dev->name = "Dell WMI hotkeys";
+ priv->input_dev->id.bustype = BUS_HOST;
+ priv->input_dev->dev.parent = &wdev->dev;
+
+ if (dmi_walk(handle_dmi_entry, &dmi_results)) {
+ /*
+ * Historically, dell-wmi ignored dmi_walk errors. A failure
+ * is certainly surprising, but it probably just indicates
+ * a very old laptop.
+ */
+ pr_warn("no DMI; using the old-style hotkey interface\n");
+ }
+
+ if (dmi_results.err) {
+ err = dmi_results.err;
+ goto err_free_dev;
+ }
+
+ keymap = kcalloc(dmi_results.keymap_size +
+ ARRAY_SIZE(dell_wmi_keymap_type_0000) +
+ ARRAY_SIZE(dell_wmi_keymap_type_0010) +
+ ARRAY_SIZE(dell_wmi_keymap_type_0011) +
+ ARRAY_SIZE(dell_wmi_keymap_type_0012) +
+ 1,
+ sizeof(struct key_entry), GFP_KERNEL);
+ if (!keymap) {
+ kfree(dmi_results.keymap);
+ err = -ENOMEM;
+ goto err_free_dev;
+ }
+
+ /* Append table with events of type 0x0010 which comes from DMI */
+ for (i = 0; i < dmi_results.keymap_size; i++) {
+ keymap[pos] = dmi_results.keymap[i];
+ keymap[pos].code |= (0x0010 << 16);
+ pos++;
+ }
+
+ kfree(dmi_results.keymap);
+
+ /* Append table with extra events of type 0x0010 which are not in DMI */
+ for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0010); i++) {
+ const struct key_entry *entry = &dell_wmi_keymap_type_0010[i];
+
+ /*
+ * Check if we've already found this scancode. This takes
+ * quadratic time, but it doesn't matter unless the list
+ * of extra keys gets very long.
+ */
+ if (dmi_results.keymap_size &&
+ have_scancode(entry->code | (0x0010 << 16),
+ keymap, dmi_results.keymap_size)
+ )
+ continue;
+
+ keymap[pos] = *entry;
+ keymap[pos].code |= (0x0010 << 16);
+ pos++;
+ }
+
+ /* Append table with events of type 0x0011 */
+ for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0011); i++) {
+ keymap[pos] = dell_wmi_keymap_type_0011[i];
+ keymap[pos].code |= (0x0011 << 16);
+ pos++;
+ }
+
+ /* Append table with events of type 0x0012 */
+ for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) {
+ keymap[pos] = dell_wmi_keymap_type_0012[i];
+ keymap[pos].code |= (0x0012 << 16);
+ pos++;
+ }
+
+ /*
+ * Now append also table with "legacy" events of type 0x0000. Some of
+ * them are reported also on laptops which have scancodes in DMI.
+ */
+ for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0000); i++) {
+ keymap[pos] = dell_wmi_keymap_type_0000[i];
+ pos++;
+ }
+
+ keymap[pos].type = KE_END;
+
+ err = sparse_keymap_setup(priv->input_dev, keymap, NULL);
+ /*
+ * Sparse keymap library makes a copy of keymap so we don't need the
+ * original one that was allocated.
+ */
+ kfree(keymap);
+ if (err)
+ goto err_free_dev;
+
+ err = input_register_device(priv->input_dev);
+ if (err)
+ goto err_free_dev;
+
+ return 0;
+
+ err_free_dev:
+ input_free_device(priv->input_dev);
+ return err;
+}
+
+static void dell_wmi_input_destroy(struct wmi_device *wdev)
+{
+ struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+
+ input_unregister_device(priv->input_dev);
+}
+
+/*
+ * According to Dell SMBIOS documentation:
+ *
+ * 17 3 Application Program Registration
+ *
+ * cbArg1 Application ID 1 = 0x00010000
+ * cbArg2 Application ID 2
+ * QUICKSET/DCP = 0x51534554 "QSET"
+ * ALS Driver = 0x416c7353 "AlsS"
+ * Latitude ON = 0x4c6f6e52 "LonR"
+ * cbArg3 Application version or revision number
+ * cbArg4 0 = Unregister application
+ * 1 = Register application
+ * cbRes1 Standard return codes (0, -1, -2)
+ */
+
+static int dell_wmi_events_set_enabled(bool enable)
+{
+ struct calling_interface_buffer *buffer;
+ int ret;
+
+ buffer = kzalloc(sizeof(struct calling_interface_buffer), GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+ buffer->cmd_class = CLASS_INFO;
+ buffer->cmd_select = SELECT_APP_REGISTRATION;
+ buffer->input[0] = 0x10000;
+ buffer->input[1] = 0x51534554;
+ buffer->input[3] = enable;
+ ret = dell_smbios_call(buffer);
+ if (ret == 0)
+ ret = buffer->output[0];
+ kfree(buffer);
+
+ return dell_smbios_error(ret);
+}
+
+static int dell_wmi_probe(struct wmi_device *wdev, const void *context)
+{
+ struct dell_wmi_priv *priv;
+ int ret;
+
+ ret = dell_wmi_get_descriptor_valid();
+ if (ret)
+ return ret;
+
+ priv = devm_kzalloc(
+ &wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ dev_set_drvdata(&wdev->dev, priv);
+
+ if (!dell_wmi_get_interface_version(&priv->interface_version))
+ return -EPROBE_DEFER;
+
+ return dell_wmi_input_setup(wdev);
+}
+
+static void dell_wmi_remove(struct wmi_device *wdev)
+{
+ dell_wmi_input_destroy(wdev);
+}
+static const struct wmi_device_id dell_wmi_id_table[] = {
+ { .guid_string = DELL_EVENT_GUID },
+ { },
+};
+
+static struct wmi_driver dell_wmi_driver = {
+ .driver = {
+ .name = "dell-wmi",
+ },
+ .id_table = dell_wmi_id_table,
+ .probe = dell_wmi_probe,
+ .remove = dell_wmi_remove,
+ .notify = dell_wmi_notify,
+};
+
+static int __init dell_wmi_init(void)
+{
+ int err;
+
+ dmi_check_system(dell_wmi_smbios_list);
+
+ if (wmi_requires_smbios_request) {
+ err = dell_wmi_events_set_enabled(true);
+ if (err) {
+ pr_err("Failed to enable WMI events\n");
+ return err;
+ }
+ }
+
+ return wmi_driver_register(&dell_wmi_driver);
+}
+late_initcall(dell_wmi_init);
+
+static void __exit dell_wmi_exit(void)
+{
+ if (wmi_requires_smbios_request)
+ dell_wmi_events_set_enabled(false);
+
+ wmi_driver_unregister(&dell_wmi_driver);
+}
+module_exit(dell_wmi_exit);
+
+MODULE_DEVICE_TABLE(wmi, dell_wmi_id_table);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Dell WMI hotkeys
- *
- * Copyright (C) 2008 Red Hat <mjg@redhat.com>
- * Copyright (C) 2014-2015 Pali Rohár <pali@kernel.org>
- *
- * Portions based on wistron_btns.c:
- * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
- * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
- * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
- */
-
-#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 <linux/input/sparse-keymap.h>
-#include <linux/acpi.h>
-#include <linux/string.h>
-#include <linux/dmi.h>
-#include <linux/wmi.h>
-#include <acpi/video.h>
-#include "dell-smbios.h"
-#include "dell-wmi-descriptor.h"
-
-MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
-MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
-MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
-MODULE_LICENSE("GPL");
-
-#define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
-
-static bool wmi_requires_smbios_request;
-
-struct dell_wmi_priv {
- struct input_dev *input_dev;
- u32 interface_version;
-};
-
-static int __init dmi_matched(const struct dmi_system_id *dmi)
-{
- wmi_requires_smbios_request = 1;
- return 1;
-}
-
-static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = {
- {
- .callback = dmi_matched,
- .ident = "Dell Inspiron M5110",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
- },
- },
- {
- .callback = dmi_matched,
- .ident = "Dell Vostro V131",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
- },
- },
- { }
-};
-
-/*
- * Keymap for WMI events of type 0x0000
- *
- * Certain keys are flagged as KE_IGNORE. All of these are either
- * notifications (rather than requests for change) or are also sent
- * via the keyboard controller so should not be sent again.
- */
-static const struct key_entry dell_wmi_keymap_type_0000[] = {
- { KE_IGNORE, 0x003a, { KEY_CAPSLOCK } },
-
- /* Key code is followed by brightness level */
- { KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } },
- { KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } },
-
- /* Battery health status button */
- { KE_KEY, 0xe007, { KEY_BATTERY } },
-
- /* Radio devices state change, key code is followed by other values */
- { KE_IGNORE, 0xe008, { KEY_RFKILL } },
-
- { KE_KEY, 0xe009, { KEY_EJECTCD } },
-
- /* Key code is followed by: next, active and attached devices */
- { KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } },
-
- /* Key code is followed by keyboard illumination level */
- { KE_IGNORE, 0xe00c, { KEY_KBDILLUMTOGGLE } },
-
- /* BIOS error detected */
- { KE_IGNORE, 0xe00d, { KEY_RESERVED } },
-
- /* Battery was removed or inserted */
- { KE_IGNORE, 0xe00e, { KEY_RESERVED } },
-
- /* Wifi Catcher */
- { KE_KEY, 0xe011, { KEY_WLAN } },
-
- /* Ambient light sensor toggle */
- { KE_IGNORE, 0xe013, { KEY_RESERVED } },
-
- { KE_IGNORE, 0xe020, { KEY_MUTE } },
-
- /* Unknown, defined in ACPI DSDT */
- /* { KE_IGNORE, 0xe023, { KEY_RESERVED } }, */
-
- /* Untested, Dell Instant Launch key on Inspiron 7520 */
- /* { KE_IGNORE, 0xe024, { KEY_RESERVED } }, */
-
- /* Dell Instant Launch key */
- { KE_KEY, 0xe025, { KEY_PROG4 } },
-
- /* Audio panel key */
- { KE_IGNORE, 0xe026, { KEY_RESERVED } },
-
- /* LCD Display On/Off Control key */
- { KE_KEY, 0xe027, { KEY_DISPLAYTOGGLE } },
-
- /* Untested, Multimedia key on Dell Vostro 3560 */
- /* { KE_IGNORE, 0xe028, { KEY_RESERVED } }, */
-
- /* Dell Instant Launch key */
- { KE_KEY, 0xe029, { KEY_PROG4 } },
-
- /* Untested, Windows Mobility Center button on Inspiron 7520 */
- /* { KE_IGNORE, 0xe02a, { KEY_RESERVED } }, */
-
- /* Unknown, defined in ACPI DSDT */
- /* { KE_IGNORE, 0xe02b, { KEY_RESERVED } }, */
-
- /* Untested, Dell Audio With Preset Switch button on Inspiron 7520 */
- /* { KE_IGNORE, 0xe02c, { 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 } },
-
- /* NIC Link is Up */
- { KE_IGNORE, 0xe043, { KEY_RESERVED } },
-
- /* NIC Link is Down */
- { KE_IGNORE, 0xe044, { KEY_RESERVED } },
-
- /*
- * This entry is very suspicious!
- * Originally Matthew Garrett created this dell-wmi driver specially for
- * "button with a picture of a battery" which has event code 0xe045.
- * Later Mario Limonciello from Dell told us that event code 0xe045 is
- * reported by Num Lock and should be ignored because key is send also
- * by keyboard controller.
- * So for now we will ignore this event to prevent potential double
- * Num Lock key press.
- */
- { KE_IGNORE, 0xe045, { KEY_NUMLOCK } },
-
- /* Scroll lock and also going to tablet mode on portable devices */
- { KE_IGNORE, 0xe046, { KEY_SCROLLLOCK } },
-
- /* Untested, going from tablet mode on portable devices */
- /* { KE_IGNORE, 0xe047, { KEY_RESERVED } }, */
-
- /* Dell Support Center key */
- { KE_IGNORE, 0xe06e, { KEY_RESERVED } },
-
- { KE_IGNORE, 0xe0f7, { KEY_MUTE } },
- { KE_IGNORE, 0xe0f8, { KEY_VOLUMEDOWN } },
- { KE_IGNORE, 0xe0f9, { KEY_VOLUMEUP } },
-};
-
-struct dell_bios_keymap_entry {
- u16 scancode;
- u16 keycode;
-};
-
-struct dell_bios_hotkey_table {
- struct dmi_header header;
- struct dell_bios_keymap_entry keymap[];
-
-};
-
-struct dell_dmi_results {
- int err;
- int keymap_size;
- struct key_entry *keymap;
-};
-
-/* Uninitialized entries here are KEY_RESERVED == 0. */
-static const u16 bios_to_linux_keycode[256] = {
- [0] = KEY_MEDIA,
- [1] = KEY_NEXTSONG,
- [2] = KEY_PLAYPAUSE,
- [3] = KEY_PREVIOUSSONG,
- [4] = KEY_STOPCD,
- [5] = KEY_UNKNOWN,
- [6] = KEY_UNKNOWN,
- [7] = KEY_UNKNOWN,
- [8] = KEY_WWW,
- [9] = KEY_UNKNOWN,
- [10] = KEY_VOLUMEDOWN,
- [11] = KEY_MUTE,
- [12] = KEY_VOLUMEUP,
- [13] = KEY_UNKNOWN,
- [14] = KEY_BATTERY,
- [15] = KEY_EJECTCD,
- [16] = KEY_UNKNOWN,
- [17] = KEY_SLEEP,
- [18] = KEY_PROG1,
- [19] = KEY_BRIGHTNESSDOWN,
- [20] = KEY_BRIGHTNESSUP,
- [21] = KEY_BRIGHTNESS_AUTO,
- [22] = KEY_KBDILLUMTOGGLE,
- [23] = KEY_UNKNOWN,
- [24] = KEY_SWITCHVIDEOMODE,
- [25] = KEY_UNKNOWN,
- [26] = KEY_UNKNOWN,
- [27] = KEY_SWITCHVIDEOMODE,
- [28] = KEY_UNKNOWN,
- [29] = KEY_UNKNOWN,
- [30] = KEY_PROG2,
- [31] = KEY_UNKNOWN,
- [32] = KEY_UNKNOWN,
- [33] = KEY_UNKNOWN,
- [34] = KEY_UNKNOWN,
- [35] = KEY_UNKNOWN,
- [36] = KEY_UNKNOWN,
- [37] = KEY_UNKNOWN,
- [38] = KEY_MICMUTE,
- [255] = KEY_PROG3,
-};
-
-/*
- * Keymap for WMI events of type 0x0010
- *
- * These are applied if the 0xB2 DMI hotkey table is present and doesn't
- * override them.
- */
-static const struct key_entry dell_wmi_keymap_type_0010[] = {
- /* Fn-lock switched to function keys */
- { KE_IGNORE, 0x0, { KEY_RESERVED } },
-
- /* Fn-lock switched to multimedia keys */
- { KE_IGNORE, 0x1, { KEY_RESERVED } },
-
- /* Keyboard backlight change notification */
- { KE_IGNORE, 0x3f, { KEY_RESERVED } },
-
- /* Backlight brightness level */
- { KE_KEY, 0x57, { KEY_BRIGHTNESSDOWN } },
- { KE_KEY, 0x58, { KEY_BRIGHTNESSUP } },
-
- /* Mic mute */
- { KE_KEY, 0x150, { KEY_MICMUTE } },
-
- /* Fn-lock */
- { KE_IGNORE, 0x151, { KEY_RESERVED } },
-
- /* Change keyboard illumination */
- { KE_IGNORE, 0x152, { KEY_KBDILLUMTOGGLE } },
-
- /*
- * Radio disable (notify only -- there is no model for which the
- * WMI event is supposed to trigger an action).
- */
- { KE_IGNORE, 0x153, { KEY_RFKILL } },
-
- /* RGB keyboard backlight control */
- { KE_IGNORE, 0x154, { KEY_RESERVED } },
-
- /*
- * Stealth mode toggle. This will "disable all lights and sounds".
- * The action is performed by the BIOS and EC; the WMI event is just
- * a notification. On the XPS 13 9350, this is Fn+F7, and there's
- * a BIOS setting to enable and disable the hotkey.
- */
- { KE_IGNORE, 0x155, { KEY_RESERVED } },
-
- /* Rugged magnetic dock attach/detach events */
- { KE_IGNORE, 0x156, { KEY_RESERVED } },
- { KE_IGNORE, 0x157, { KEY_RESERVED } },
-
- /* Rugged programmable (P1/P2/P3 keys) */
- { KE_KEY, 0x850, { KEY_PROG1 } },
- { KE_KEY, 0x851, { KEY_PROG2 } },
- { KE_KEY, 0x852, { KEY_PROG3 } },
-
- /*
- * Radio disable (notify only -- there is no model for which the
- * WMI event is supposed to trigger an action).
- */
- { KE_IGNORE, 0xe008, { KEY_RFKILL } },
-
- /* Fn-lock */
- { KE_IGNORE, 0xe035, { KEY_RESERVED } },
-};
-
-/*
- * Keymap for WMI events of type 0x0011
- */
-static const struct key_entry dell_wmi_keymap_type_0011[] = {
- /* Battery unplugged */
- { KE_IGNORE, 0xfff0, { KEY_RESERVED } },
-
- /* Battery inserted */
- { KE_IGNORE, 0xfff1, { KEY_RESERVED } },
-
- /*
- * Detachable keyboard detached / undocked
- * Note SW_TABLET_MODE is already reported through the intel_vbtn
- * driver for this, so we ignore it.
- */
- { KE_IGNORE, 0xfff2, { KEY_RESERVED } },
-
- /* Detachable keyboard attached / docked */
- { KE_IGNORE, 0xfff3, { KEY_RESERVED } },
-
- /* Keyboard backlight level changed */
- { KE_IGNORE, KBD_LED_OFF_TOKEN, { KEY_RESERVED } },
- { KE_IGNORE, KBD_LED_ON_TOKEN, { KEY_RESERVED } },
- { KE_IGNORE, KBD_LED_AUTO_TOKEN, { KEY_RESERVED } },
- { KE_IGNORE, KBD_LED_AUTO_25_TOKEN, { KEY_RESERVED } },
- { KE_IGNORE, KBD_LED_AUTO_50_TOKEN, { KEY_RESERVED } },
- { KE_IGNORE, KBD_LED_AUTO_75_TOKEN, { KEY_RESERVED } },
- { KE_IGNORE, KBD_LED_AUTO_100_TOKEN, { KEY_RESERVED } },
-};
-
-/*
- * Keymap for WMI events of type 0x0012
- * They are events with extended data
- */
-static const struct key_entry dell_wmi_keymap_type_0012[] = {
- /* Fn-lock button pressed */
- { KE_IGNORE, 0xe035, { KEY_RESERVED } },
-};
-
-static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code)
-{
- struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
- const struct key_entry *key;
-
- key = sparse_keymap_entry_from_scancode(priv->input_dev,
- (type << 16) | code);
- if (!key) {
- pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n",
- type, code);
- return;
- }
-
- pr_debug("Key with type 0x%04x and code 0x%04x pressed\n", type, code);
-
- /* Don't report brightness notifications that will also come via ACPI */
- if ((key->keycode == KEY_BRIGHTNESSUP ||
- key->keycode == KEY_BRIGHTNESSDOWN) &&
- acpi_video_handles_brightness_key_presses())
- return;
-
- if (type == 0x0000 && code == 0xe025 && !wmi_requires_smbios_request)
- return;
-
- if (key->keycode == KEY_KBDILLUMTOGGLE)
- dell_laptop_call_notifier(
- DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, NULL);
-
- sparse_keymap_report_entry(priv->input_dev, key, 1, true);
-}
-
-static void dell_wmi_notify(struct wmi_device *wdev,
- union acpi_object *obj)
-{
- struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
- u16 *buffer_entry, *buffer_end;
- acpi_size buffer_size;
- int len, i;
-
- if (obj->type != ACPI_TYPE_BUFFER) {
- pr_warn("bad response type %x\n", obj->type);
- return;
- }
-
- pr_debug("Received WMI event (%*ph)\n",
- obj->buffer.length, obj->buffer.pointer);
-
- buffer_entry = (u16 *)obj->buffer.pointer;
- buffer_size = obj->buffer.length/2;
- buffer_end = buffer_entry + buffer_size;
-
- /*
- * BIOS/ACPI on devices with WMI interface version 0 does not clear
- * buffer before filling it. So next time when BIOS/ACPI send WMI event
- * which is smaller as previous then it contains garbage in buffer from
- * previous event.
- *
- * BIOS/ACPI on devices with WMI interface version 1 clears buffer and
- * sometimes send more events in buffer at one call.
- *
- * So to prevent reading garbage from buffer we will process only first
- * one event on devices with WMI interface version 0.
- */
- if (priv->interface_version == 0 && buffer_entry < buffer_end)
- if (buffer_end > buffer_entry + buffer_entry[0] + 1)
- buffer_end = buffer_entry + buffer_entry[0] + 1;
-
- while (buffer_entry < buffer_end) {
-
- len = buffer_entry[0];
- if (len == 0)
- break;
-
- len++;
-
- if (buffer_entry + len > buffer_end) {
- pr_warn("Invalid length of WMI event\n");
- break;
- }
-
- pr_debug("Process buffer (%*ph)\n", len*2, buffer_entry);
-
- switch (buffer_entry[1]) {
- case 0x0000: /* One key pressed or event occurred */
- case 0x0012: /* Event with extended data occurred */
- if (len > 2)
- dell_wmi_process_key(wdev, buffer_entry[1],
- buffer_entry[2]);
- /* Extended data is currently ignored */
- break;
- case 0x0010: /* Sequence of keys pressed */
- case 0x0011: /* Sequence of events occurred */
- for (i = 2; i < len; ++i)
- dell_wmi_process_key(wdev, buffer_entry[1],
- buffer_entry[i]);
- break;
- default: /* Unknown event */
- pr_info("Unknown WMI event type 0x%x\n",
- (int)buffer_entry[1]);
- break;
- }
-
- buffer_entry += len;
-
- }
-
-}
-
-static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
-{
- int i;
-
- for (i = 0; i < len; i++)
- if (keymap[i].code == scancode)
- return true;
-
- return false;
-}
-
-static void handle_dmi_entry(const struct dmi_header *dm, void *opaque)
-{
- struct dell_dmi_results *results = opaque;
- struct dell_bios_hotkey_table *table;
- int hotkey_num, i, pos = 0;
- struct key_entry *keymap;
-
- if (results->err || results->keymap)
- return; /* We already found the hotkey table. */
-
- /* The Dell hotkey table is type 0xB2. Scan until we find it. */
- if (dm->type != 0xb2)
- return;
-
- table = container_of(dm, struct dell_bios_hotkey_table, header);
-
- hotkey_num = (table->header.length -
- sizeof(struct dell_bios_hotkey_table)) /
- sizeof(struct dell_bios_keymap_entry);
- if (hotkey_num < 1) {
- /*
- * Historically, dell-wmi would ignore a DMI entry of
- * fewer than 7 bytes. Sizes between 4 and 8 bytes are
- * nonsensical (both the header and all entries are 4
- * bytes), so we approximate the old behavior by
- * ignoring tables with fewer than one entry.
- */
- return;
- }
-
- keymap = kcalloc(hotkey_num, sizeof(struct key_entry), GFP_KERNEL);
- if (!keymap) {
- results->err = -ENOMEM;
- return;
- }
-
- for (i = 0; i < hotkey_num; i++) {
- const struct dell_bios_keymap_entry *bios_entry =
- &table->keymap[i];
-
- /* Uninitialized entries are 0 aka KEY_RESERVED. */
- u16 keycode = (bios_entry->keycode <
- ARRAY_SIZE(bios_to_linux_keycode)) ?
- bios_to_linux_keycode[bios_entry->keycode] :
- (bios_entry->keycode == 0xffff ? KEY_UNKNOWN : KEY_RESERVED);
-
- /*
- * Log if we find an entry in the DMI table that we don't
- * understand. If this happens, we should figure out what
- * the entry means and add it to bios_to_linux_keycode.
- */
- if (keycode == KEY_RESERVED) {
- pr_info("firmware scancode 0x%x maps to unrecognized keycode 0x%x\n",
- bios_entry->scancode, bios_entry->keycode);
- continue;
- }
-
- if (keycode == KEY_KBDILLUMTOGGLE)
- keymap[pos].type = KE_IGNORE;
- else
- keymap[pos].type = KE_KEY;
- keymap[pos].code = bios_entry->scancode;
- keymap[pos].keycode = keycode;
-
- pos++;
- }
-
- results->keymap = keymap;
- results->keymap_size = pos;
-}
-
-static int dell_wmi_input_setup(struct wmi_device *wdev)
-{
- struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
- struct dell_dmi_results dmi_results = {};
- struct key_entry *keymap;
- int err, i, pos = 0;
-
- priv->input_dev = input_allocate_device();
- if (!priv->input_dev)
- return -ENOMEM;
-
- priv->input_dev->name = "Dell WMI hotkeys";
- priv->input_dev->id.bustype = BUS_HOST;
- priv->input_dev->dev.parent = &wdev->dev;
-
- if (dmi_walk(handle_dmi_entry, &dmi_results)) {
- /*
- * Historically, dell-wmi ignored dmi_walk errors. A failure
- * is certainly surprising, but it probably just indicates
- * a very old laptop.
- */
- pr_warn("no DMI; using the old-style hotkey interface\n");
- }
-
- if (dmi_results.err) {
- err = dmi_results.err;
- goto err_free_dev;
- }
-
- keymap = kcalloc(dmi_results.keymap_size +
- ARRAY_SIZE(dell_wmi_keymap_type_0000) +
- ARRAY_SIZE(dell_wmi_keymap_type_0010) +
- ARRAY_SIZE(dell_wmi_keymap_type_0011) +
- ARRAY_SIZE(dell_wmi_keymap_type_0012) +
- 1,
- sizeof(struct key_entry), GFP_KERNEL);
- if (!keymap) {
- kfree(dmi_results.keymap);
- err = -ENOMEM;
- goto err_free_dev;
- }
-
- /* Append table with events of type 0x0010 which comes from DMI */
- for (i = 0; i < dmi_results.keymap_size; i++) {
- keymap[pos] = dmi_results.keymap[i];
- keymap[pos].code |= (0x0010 << 16);
- pos++;
- }
-
- kfree(dmi_results.keymap);
-
- /* Append table with extra events of type 0x0010 which are not in DMI */
- for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0010); i++) {
- const struct key_entry *entry = &dell_wmi_keymap_type_0010[i];
-
- /*
- * Check if we've already found this scancode. This takes
- * quadratic time, but it doesn't matter unless the list
- * of extra keys gets very long.
- */
- if (dmi_results.keymap_size &&
- have_scancode(entry->code | (0x0010 << 16),
- keymap, dmi_results.keymap_size)
- )
- continue;
-
- keymap[pos] = *entry;
- keymap[pos].code |= (0x0010 << 16);
- pos++;
- }
-
- /* Append table with events of type 0x0011 */
- for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0011); i++) {
- keymap[pos] = dell_wmi_keymap_type_0011[i];
- keymap[pos].code |= (0x0011 << 16);
- pos++;
- }
-
- /* Append table with events of type 0x0012 */
- for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) {
- keymap[pos] = dell_wmi_keymap_type_0012[i];
- keymap[pos].code |= (0x0012 << 16);
- pos++;
- }
-
- /*
- * Now append also table with "legacy" events of type 0x0000. Some of
- * them are reported also on laptops which have scancodes in DMI.
- */
- for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0000); i++) {
- keymap[pos] = dell_wmi_keymap_type_0000[i];
- pos++;
- }
-
- keymap[pos].type = KE_END;
-
- err = sparse_keymap_setup(priv->input_dev, keymap, NULL);
- /*
- * Sparse keymap library makes a copy of keymap so we don't need the
- * original one that was allocated.
- */
- kfree(keymap);
- if (err)
- goto err_free_dev;
-
- err = input_register_device(priv->input_dev);
- if (err)
- goto err_free_dev;
-
- return 0;
-
- err_free_dev:
- input_free_device(priv->input_dev);
- return err;
-}
-
-static void dell_wmi_input_destroy(struct wmi_device *wdev)
-{
- struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
-
- input_unregister_device(priv->input_dev);
-}
-
-/*
- * According to Dell SMBIOS documentation:
- *
- * 17 3 Application Program Registration
- *
- * cbArg1 Application ID 1 = 0x00010000
- * cbArg2 Application ID 2
- * QUICKSET/DCP = 0x51534554 "QSET"
- * ALS Driver = 0x416c7353 "AlsS"
- * Latitude ON = 0x4c6f6e52 "LonR"
- * cbArg3 Application version or revision number
- * cbArg4 0 = Unregister application
- * 1 = Register application
- * cbRes1 Standard return codes (0, -1, -2)
- */
-
-static int dell_wmi_events_set_enabled(bool enable)
-{
- struct calling_interface_buffer *buffer;
- int ret;
-
- buffer = kzalloc(sizeof(struct calling_interface_buffer), GFP_KERNEL);
- if (!buffer)
- return -ENOMEM;
- buffer->cmd_class = CLASS_INFO;
- buffer->cmd_select = SELECT_APP_REGISTRATION;
- buffer->input[0] = 0x10000;
- buffer->input[1] = 0x51534554;
- buffer->input[3] = enable;
- ret = dell_smbios_call(buffer);
- if (ret == 0)
- ret = buffer->output[0];
- kfree(buffer);
-
- return dell_smbios_error(ret);
-}
-
-static int dell_wmi_probe(struct wmi_device *wdev, const void *context)
-{
- struct dell_wmi_priv *priv;
- int ret;
-
- ret = dell_wmi_get_descriptor_valid();
- if (ret)
- return ret;
-
- priv = devm_kzalloc(
- &wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
- dev_set_drvdata(&wdev->dev, priv);
-
- if (!dell_wmi_get_interface_version(&priv->interface_version))
- return -EPROBE_DEFER;
-
- return dell_wmi_input_setup(wdev);
-}
-
-static void dell_wmi_remove(struct wmi_device *wdev)
-{
- dell_wmi_input_destroy(wdev);
-}
-static const struct wmi_device_id dell_wmi_id_table[] = {
- { .guid_string = DELL_EVENT_GUID },
- { },
-};
-
-static struct wmi_driver dell_wmi_driver = {
- .driver = {
- .name = "dell-wmi",
- },
- .id_table = dell_wmi_id_table,
- .probe = dell_wmi_probe,
- .remove = dell_wmi_remove,
- .notify = dell_wmi_notify,
-};
-
-static int __init dell_wmi_init(void)
-{
- int err;
-
- dmi_check_system(dell_wmi_smbios_list);
-
- if (wmi_requires_smbios_request) {
- err = dell_wmi_events_set_enabled(true);
- if (err) {
- pr_err("Failed to enable WMI events\n");
- return err;
- }
- }
-
- return wmi_driver_register(&dell_wmi_driver);
-}
-late_initcall(dell_wmi_init);
-
-static void __exit dell_wmi_exit(void)
-{
- if (wmi_requires_smbios_request)
- dell_wmi_events_set_enabled(false);
-
- wmi_driver_unregister(&dell_wmi_driver);
-}
-module_exit(dell_wmi_exit);
-
-MODULE_DEVICE_TABLE(wmi, dell_wmi_id_table);
projects / linux-2.6-microblaze.git / commitdiff