From 713c8aad6b7202671ce1ac6109f6b48d8223e938 Mon Sep 17 00:00:00 2001 From: Pete Zaitcev Date: Fri, 6 Apr 2007 14:33:18 +0200 Subject: [PATCH] USB HID: numlock quirk for dell W7658 keyboard On Dell W7658 keyboard, when BIOS sets NumLock LED on, it survives the takeover by kernel and thus confuses users. Eating of an increasibly scarce quirk bit is unfortunate. We do it for safety, given the history of nervous input devices which crash if anything unusual happens. Signed-off-by: Pete Zaitcev Signed-off-by: Jiri Kosina --- drivers/hid/usbhid/hid-core.c | 45 +++++++++++++++++++++++++++++++++++ include/linux/hid.h | 1 + 2 files changed, 46 insertions(+) diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index 762cb35e769b..cec3bffa0a9a 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -129,6 +129,9 @@ MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); #define USB_DEVICE_ID_CYPRESS_HIDCOM 0x5500 #define USB_DEVICE_ID_CYPRESS_ULTRAMOUSE 0x7417 +#define USB_VENDOR_ID_DELL 0x413c +#define USB_DEVICE_ID_DELL_W7658 0x2005 + #define USB_VENDOR_ID_DELORME 0x1163 #define USB_DEVICE_ID_DELORME_EARTHMATE 0x0100 #define USB_DEVICE_ID_DELORME_EM_LT20 0x0200 @@ -469,6 +472,8 @@ static const struct hid_blacklist { { USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY, HID_QUIRK_POWERBOOK_HAS_FN | HID_QUIRK_IGNORE_MOUSE }, { USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY, HID_QUIRK_POWERBOOK_HAS_FN | HID_QUIRK_IGNORE_MOUSE }, + { USB_VENDOR_ID_DELL, USB_DEVICE_ID_DELL_W7658, HID_QUIRK_RESET_LEDS }, + { 0, 0 } }; @@ -963,6 +968,44 @@ void usbhid_init_reports(struct hid_device *hid) warn("timeout initializing reports"); } +/* + * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). + */ +static int hid_find_field_early(struct hid_device *hid, unsigned int page, + unsigned int hid_code, struct hid_field **pfield) +{ + struct hid_report *report; + struct hid_field *field; + struct hid_usage *usage; + int i, j; + + list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { + for (i = 0; i < report->maxfield; i++) { + field = report->field[i]; + for (j = 0; j < field->maxusage; j++) { + usage = &field->usage[j]; + if ((usage->hid & HID_USAGE_PAGE) == page && + (usage->hid & 0xFFFF) == hid_code) { + *pfield = field; + return j; + } + } + } + } + return -1; +} + +static void usbhid_set_leds(struct hid_device *hid) +{ + struct hid_field *field; + int offset; + + if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { + hid_set_field(field, offset, 0); + usbhid_submit_report(hid, field->report, USB_DIR_OUT); + } +} + /* * Traverse the supplied list of reports and find the longest */ @@ -1348,6 +1391,8 @@ static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id) usbhid_init_reports(hid); hid_dump_device(hid); + if (hid->quirks & HID_QUIRK_RESET_LEDS) + usbhid_set_leds(hid); if (!hidinput_connect(hid)) hid->claimed |= HID_CLAIMED_INPUT; diff --git a/include/linux/hid.h b/include/linux/hid.h index 55184415fd6b..d73b24b1e265 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -269,6 +269,7 @@ struct hid_item { #define HID_QUIRK_SONY_PS3_CONTROLLER 0x00080000 #define HID_QUIRK_LOGITECH_DESCRIPTOR 0x00100000 #define HID_QUIRK_DUPLICATE_USAGES 0x00200000 +#define HID_QUIRK_RESET_LEDS 0x00400000 /* * This is the global environment of the parser. This information is -- 2.39.5