#include <linux/string.h>
#include <linux/dmi.h>
#include <acpi/video.h>
+#include "dell-smbios.h"
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
#define DELL_DESCRIPTOR_GUID "8D9DDCBC-A997-11DA-B012-B622A1EF5492"
static u32 dell_wmi_interface_version;
+static bool wmi_requires_smbios_request;
MODULE_ALIAS("wmi:"DELL_EVENT_GUID);
MODULE_ALIAS("wmi:"DELL_DESCRIPTOR_GUID);
+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"),
+ },
+ },
+ { }
+};
+
/*
* Certain keys are flagged as KE_IGNORE. All of these are either
* notifications (rather than requests for change) or are also sent
{ KE_IGNORE, 0xe020, { KEY_MUTE } },
- /* Shortcut and audio panel keys */
- { KE_IGNORE, 0xe025, { KEY_RESERVED } },
+ /* Dell Instant Launch key */
+ { KE_KEY, 0xe025, { KEY_PROG4 } },
+ { KE_KEY, 0xe029, { KEY_PROG4 } },
+
+ /* Audio panel key */
{ KE_IGNORE, 0xe026, { KEY_RESERVED } },
{ KE_IGNORE, 0xe02e, { KEY_VOLUMEDOWN } },
};
-static const struct dell_bios_hotkey_table *dell_bios_hotkey_table;
+struct dell_dmi_results {
+ int err;
+ struct key_entry *keymap;
+};
/* Uninitialized entries here are KEY_RESERVED == 0. */
static const u16 bios_to_linux_keycode[256] __initconst = {
[255] = KEY_PROG3,
};
+/*
+ * These are applied if the 0xB2 DMI hotkey table is present and doesn't
+ * override them.
+ */
+static const struct key_entry dell_wmi_extra_keymap[] __initconst = {
+ /* 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 */
+ { KE_IGNORE, 0x155, { KEY_RESERVED } },
+};
+
static struct input_dev *dell_wmi_input_dev;
static void dell_wmi_process_key(int reported_key)
acpi_video_handles_brightness_key_presses())
return;
+ if (reported_key == 0xe025 && !wmi_requires_smbios_request)
+ return;
+
sparse_keymap_report_entry(dell_wmi_input_dev, key, 1, true);
}
kfree(obj);
}
-static const struct key_entry * __init dell_wmi_prepare_new_keymap(void)
+static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
{
- 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 < len; i++)
+ if (keymap[i].code == scancode)
+ return true;
+
+ return false;
+}
+
+static void __init 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;
+ int num_bios_keys;
+
+ if (results->err || results->keymap)
+ return; /* We already found the hotkey table. */
+
+ 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 + ARRAY_SIZE(dell_wmi_extra_keymap) + 1,
+ 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 =
- &dell_bios_hotkey_table->keymap[i];
+ &table->keymap[i];
/* Uninitialized entries are 0 aka KEY_RESERVED. */
u16 keycode = (bios_entry->keycode <
}
if (keycode == KEY_KBDILLUMTOGGLE)
- keymap[i].type = KE_IGNORE;
+ keymap[pos].type = KE_IGNORE;
else
- keymap[i].type = KE_KEY;
- keymap[i].code = bios_entry->scancode;
- keymap[i].keycode = keycode;
+ keymap[pos].type = KE_KEY;
+ keymap[pos].code = bios_entry->scancode;
+ keymap[pos].keycode = keycode;
+
+ pos++;
+ }
+
+ num_bios_keys = pos;
+
+ for (i = 0; i < ARRAY_SIZE(dell_wmi_extra_keymap); i++) {
+ const struct key_entry *entry = &dell_wmi_extra_keymap[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 (!have_scancode(entry->code, keymap, num_bios_keys)) {
+ keymap[pos] = *entry;
+ pos++;
+ }
}
- keymap[hotkey_num].type = KE_END;
+ keymap[pos].type = KE_END;
- return keymap;
+ results->keymap = keymap;
}
static int __init dell_wmi_input_setup(void)
{
+ struct dell_dmi_results dmi_results = {};
int err;
dell_wmi_input_dev = input_allocate_device();
dell_wmi_input_dev->phys = "wmi/input0";
dell_wmi_input_dev->id.bustype = BUS_HOST;
- if (dell_new_hk_type) {
- const struct key_entry *keymap = dell_wmi_prepare_new_keymap();
- if (!keymap) {
- err = -ENOMEM;
- goto err_free_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");
+ }
- err = sparse_keymap_setup(dell_wmi_input_dev, keymap, NULL);
+ if (dmi_results.err) {
+ err = dmi_results.err;
+ goto err_free_dev;
+ }
+
+ if (dmi_results.keymap) {
+ dell_new_hk_type = true;
+
+ err = sparse_keymap_setup(dell_wmi_input_dev,
+ dmi_results.keymap, NULL);
/*
* Sparse keymap library makes a copy of keymap so we
* don't need the original one that was allocated.
*/
- kfree(keymap);
+ kfree(dmi_results.keymap);
} else {
err = sparse_keymap_setup(dell_wmi_input_dev,
dell_wmi_legacy_keymap, NULL);
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);
- }
-}
-
/*
* Descriptor buffer is 128 byte long and contains:
*
return 0;
}
+/*
+ * 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 = dell_smbios_get_buffer();
+ buffer->input[0] = 0x10000;
+ buffer->input[1] = 0x51534554;
+ buffer->input[3] = enable;
+ dell_smbios_send_request(17, 3);
+ ret = buffer->output[0];
+ dell_smbios_release_buffer();
+
+ return dell_smbios_error(ret);
+}
+
static int __init dell_wmi_init(void)
{
int err;
if (err)
return err;
- dmi_walk(find_hk_type, NULL);
-
err = dell_wmi_input_setup();
if (err)
return err;
return -ENODEV;
}
+ 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");
+ wmi_remove_notify_handler(DELL_EVENT_GUID);
+ dell_wmi_input_destroy();
+ return err;
+ }
+ }
+
return 0;
}
module_init(dell_wmi_init);
static void __exit dell_wmi_exit(void)
{
+ if (wmi_requires_smbios_request)
+ dell_wmi_events_set_enabled(false);
wmi_remove_notify_handler(DELL_EVENT_GUID);
dell_wmi_input_destroy();
}
projects / deliverable / linux.git / blobdiff