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Subject[PATCH] hid: Add custom driver for Lenovo ThinkPad Compact Bluetooth Keyboard
Date
This keyboard requires some custom mappings for all keys to be
available, and the Fn-lock toggle needs to be controlled in software.

Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
---
I assume that Linux users want Fn-Lock enabled by default, so they can
get at the function keys. If this is an incorrect assumption then can
change it---so long as there's some way of me leaving it enabled :)

Tested with and applies cleanly to 3.13.6.

drivers/hid/Kconfig | 10 ++
drivers/hid/Makefile | 1 +
drivers/hid/hid-core.c | 3 +
drivers/hid/hid-ids.h | 1 +
drivers/hid/hid-lenovo-tpcompactkbd.c | 191 ++++++++++++++++++++++++++++++++++
5 files changed, 206 insertions(+)
create mode 100644 drivers/hid/hid-lenovo-tpcompactkbd.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 34e2d39..8e45413 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -335,6 +335,16 @@ config HID_LENOVO_TPKBD
sensitivity of the trackpoint, using the microphone mute button or
controlling the mute and microphone mute LEDs.

+config HID_LENOVO_CBTKBD
+ tristate "Lenovo ThinkPad Compact Bluetooth Keyboard with TrackPoint"
+ depends on HID
+ ---help---
+ Support for the Lenovo ThinkPad Compact Bluetooth Keyboard with TrackPoint.
+
+ Say Y here if you have a Lenovo ThinkPad Compact Bluetooth Keyboard with
+ TrackPoint and would like to use the function keys as function keys, as
+ well as letting linux recognise the special functions such as brightness.
+
config HID_LOGITECH
tristate "Logitech devices" if EXPERT
depends on HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 30e4431..c0a2f89 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_HID_KEYTOUCH) += hid-keytouch.o
obj-$(CONFIG_HID_KYE) += hid-kye.o
obj-$(CONFIG_HID_LCPOWER) += hid-lcpower.o
obj-$(CONFIG_HID_LENOVO_TPKBD) += hid-lenovo-tpkbd.o
+obj-$(CONFIG_HID_LENOVO_CBTKBD) += hid-lenovo-tpcompactkbd.o
obj-$(CONFIG_HID_LOGITECH) += hid-logitech.o
obj-$(CONFIG_HID_LOGITECH_DJ) += hid-logitech-dj.o
obj-$(CONFIG_HID_MAGICMOUSE) += hid-magicmouse.o
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 253fe23..77bce8f 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1734,6 +1734,9 @@ static const struct hid_device_id hid_have_special_driver[] = {
#if IS_ENABLED(CONFIG_HID_LENOVO_TPKBD)
{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
#endif
+#if IS_ENABLED(CONFIG_HID_LENOVO_CBTKBD)
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_CBTKBD) },
+#endif
{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index f9304cb..6802166 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -539,6 +539,7 @@

#define USB_VENDOR_ID_LENOVO 0x17ef
#define USB_DEVICE_ID_LENOVO_TPKBD 0x6009
+#define USB_DEVICE_ID_LENOVO_CBTKBD 0x6048

#define USB_VENDOR_ID_LG 0x1fd2
#define USB_DEVICE_ID_LG_MULTITOUCH 0x0064
diff --git a/drivers/hid/hid-lenovo-tpcompactkbd.c b/drivers/hid/hid-lenovo-tpcompactkbd.c
new file mode 100644
index 0000000..0fd085b
--- /dev/null
+++ b/drivers/hid/hid-lenovo-tpcompactkbd.c
@@ -0,0 +1,191 @@
+/*
+ * ThinkPad Compact (Bluetooth|USB) Keyboard with TrackPoint
+ *
+ * Copyright (c) 2014 Jamie Lentin <jm@lentin.co.uk>
+ *
+ */
+
+/*
+ * 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.
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+static unsigned int fnmode;
+module_param(fnmode, uint, 0644);
+MODULE_PARM_DESC(fnmode, "Fn lock mode ([0] = normal (Fn Lock toggles), 1 = Permanently on, 2 = Permanently off)");
+
+struct tpcompactkbd_sc {
+ unsigned int fn_lock;
+};
+
+/* Send a config command to the keyboard */
+static int tpcompactkbd_send_cmd(struct hid_device *hdev,
+ unsigned char byte2, unsigned char byte3)
+{
+ unsigned char buf[] = {0x18, byte2, byte3};
+
+ return hdev->hid_output_raw_report(hdev, buf, sizeof(buf),
+ HID_OUTPUT_REPORT);
+}
+
+/* Toggle fnlock on or off, if fnmode allows */
+static void tpcompactkbd_toggle_fnlock(struct hid_device *hdev)
+{
+ struct tpcompactkbd_sc *tpcsc = hid_get_drvdata(hdev);
+
+ tpcsc->fn_lock = fnmode == 2 ? 0 : fnmode == 1 ? 1 : !tpcsc->fn_lock;
+ if (tpcompactkbd_send_cmd(hdev, 0x05, tpcsc->fn_lock ? 0x01 : 0x00))
+ hid_err(hdev, "Fn-lock toggle failed\n");
+}
+
+/*
+ * Keyboard sends non-standard reports for most "hotkey" Fn functions.
+ * Map these back to regular keys.
+ *
+ * Esc: KEY_FN_ESC FnLock
+ * (F1--F3 are regular keys)
+ * F4: KEY_MICMUTE Mic Mute
+ * F5: KEY_BRIGHTNESSDOWN Brightness down
+ * F6: KEY_BRIGHTNESSUP Brightness up
+ * F7: KEY_SWITCHVIDEOMODE External display (projector)
+ * F8: KEY_FN_F8 Wireless
+ * F9: KEY_CONFIG Control panel / settings
+ * F10: KEY_SEARCH Search
+ * F11: KEY_FN_F11 View open applications (3 boxes)
+ * F12: KEY_FN_F12 Open My computer (6 boxes)
+ */
+
+#define tpckbd_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
+ EV_KEY, (c))
+static int tpcompactkbd_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi, struct hid_field *field,
+ struct hid_usage *usage, unsigned long **bit, int *max)
+{
+ if ((usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
+ set_bit(EV_REP, hi->input->evbit);
+ switch (usage->hid & HID_USAGE) {
+ case 0x03f1:
+ tpckbd_map_key_clear(KEY_FN_F8);
+ return 1;
+ case 0x0221:
+ tpckbd_map_key_clear(KEY_SEARCH);
+ return 1;
+ case 0x03f2:
+ tpckbd_map_key_clear(KEY_FN_F12);
+ return 1;
+ }
+ }
+
+ if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
+ set_bit(EV_REP, hi->input->evbit);
+ switch (usage->hid & HID_USAGE) {
+ case 0x00f0:
+ tpckbd_map_key_clear(KEY_FN_ESC);
+ return 1;
+ case 0x00f1:
+ tpckbd_map_key_clear(KEY_MICMUTE);
+ return 1;
+ case 0x00f2:
+ tpckbd_map_key_clear(KEY_BRIGHTNESSDOWN);
+ return 1;
+ case 0x00f3:
+ tpckbd_map_key_clear(KEY_BRIGHTNESSUP);
+ return 1;
+ case 0x00f4:
+ tpckbd_map_key_clear(KEY_SWITCHVIDEOMODE);
+ return 1;
+ case 0x00f5:
+ tpckbd_map_key_clear(KEY_FN_F8);
+ return 1;
+ case 0x00f6:
+ tpckbd_map_key_clear(KEY_CONFIG);
+ return 1;
+ case 0x00f8:
+ tpckbd_map_key_clear(KEY_FN_F11);
+ return 1;
+ case 0x00fa:
+ tpckbd_map_key_clear(KEY_FN_ESC);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int tpcompactkbd_event(struct hid_device *hdev, struct hid_field *field,
+ struct hid_usage *usage, __s32 value)
+{
+ /* Switch fn-lock on fn-esc */
+ if (unlikely(usage->code == KEY_FN_ESC && value))
+ tpcompactkbd_toggle_fnlock(hdev);
+
+ return 0;
+}
+
+static int tpcompactkbd_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ int ret;
+ struct tpcompactkbd_sc *tpcsc;
+
+ tpcsc = devm_kzalloc(&hdev->dev, sizeof(*tpcsc), GFP_KERNEL);
+ if (tpcsc == NULL) {
+ hid_err(hdev, "can't alloc keyboard descriptor\n");
+ return -ENOMEM;
+ }
+ hid_set_drvdata(hdev, tpcsc);
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "hid_parse failed\n");
+ return ret;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret) {
+ hid_err(hdev, "hid_hw_start failed\n");
+ return ret;
+ }
+
+ /*
+ * Tell the keyboard a driver understands it, and turn F7, F9, F11 into
+ * regular keys
+ */
+ ret = tpcompactkbd_send_cmd(hdev, 0x01, 0x03);
+ if (ret)
+ hid_warn(hdev, "Failed to switch F7/9/11 into regular keys\n");
+
+ /* Toggle once to init the state of fn-lock */
+ tpcsc->fn_lock = 0;
+ tpcompactkbd_toggle_fnlock(hdev);
+
+ return 0;
+}
+
+static const struct hid_device_id tpcompactkbd_devices[] = {
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_CBTKBD) },
+
+ { }
+};
+MODULE_DEVICE_TABLE(hid, tpcompactkbd_devices);
+
+static struct hid_driver tpcompactkbd_driver = {
+ .name = "lenovo_tpcompactkbd",
+ .id_table = tpcompactkbd_devices,
+ .input_mapping = tpcompactkbd_input_mapping,
+ .probe = tpcompactkbd_probe,
+ .event = tpcompactkbd_event,
+};
+module_hid_driver(tpcompactkbd_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jamie Lentin <jm@lentin.co.uk>");
+MODULE_DESCRIPTION("ThinkPad Compact Keyboard with TrackPoint input driver");
--
1.8.5.2


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