From patchwork Tue May 11 20:16:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Link Mauve X-Patchwork-Id: 12252019 X-Patchwork-Delegate: jikos@jikos.cz Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0941AC43460 for ; Tue, 11 May 2021 20:16:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE96C6190A for ; Tue, 11 May 2021 20:16:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229952AbhEKURV (ORCPT ); Tue, 11 May 2021 16:17:21 -0400 Received: from 82-65-109-163.subs.proxad.net ([82.65.109.163]:37942 "EHLO luna.linkmauve.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229809AbhEKURV (ORCPT ); Tue, 11 May 2021 16:17:21 -0400 Received: by luna.linkmauve.fr (Postfix, from userid 1000) id BDD21F4063B; Tue, 11 May 2021 22:16:11 +0200 (CEST) From: Emmanuel Gil Peyrot To: linux-input@vger.kernel.org Cc: Emmanuel Gil Peyrot , Ash Logan , =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , =?utf-8?q?Barnab?= =?utf-8?q?=C3=A1s_P=C5=91cze?= , Jiri Kosina , Benjamin Tissoires , linux-kernel@vger.kernel.org Subject: [PATCH v2 2/4] HID: wiiu-drc: Implement touch reports Date: Tue, 11 May 2021 22:16:02 +0200 Message-Id: <20210511201604.23204-3-linkmauve@linkmauve.fr> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210511201604.23204-1-linkmauve@linkmauve.fr> References: <20210511201604.23204-1-linkmauve@linkmauve.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org There is an inaccessible border on each side, 100 units on the left and right sides, and 200 units at the top and bottom. The Y axis is inverted too, these are the two main quirks of this touch panel. I’ve been testing with weston-simple-touch mostly, but it also with the rest of Weston and it aligns perfectly without the need of any additional calibration. Signed-off-by: Ash Logan Signed-off-by: Emmanuel Gil Peyrot --- drivers/hid/hid-wiiu-drc.c | 86 +++++++++++++++++++++++++++++++++++--- 1 file changed, 81 insertions(+), 5 deletions(-) diff --git a/drivers/hid/hid-wiiu-drc.c b/drivers/hid/hid-wiiu-drc.c index 875ccfab7bbf..33c02d3494aa 100644 --- a/drivers/hid/hid-wiiu-drc.c +++ b/drivers/hid/hid-wiiu-drc.c @@ -51,13 +51,27 @@ #define BUTTON_POWER BIT(25) +/* Touch constants */ +/* Resolution in pixels */ +#define RES_X 854 +#define RES_Y 480 +/* Display/touch size in mm */ +#define WIDTH 138 +#define HEIGHT 79 +#define NUM_TOUCH_POINTS 10 +#define MAX_TOUCH_RES (1 << 12) +#define TOUCH_BORDER_X 100 +#define TOUCH_BORDER_Y 200 + /* * The device is setup with multiple input devices: * - A joypad with the buttons and sticks. + * - The touch area which works as a touchscreen. */ struct drc { struct input_dev *joy_input_dev; + struct input_dev *touch_input_dev; struct hid_device *hdev; }; @@ -73,7 +87,7 @@ static int drc_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int len) { struct drc *drc = hid_get_drvdata(hdev); - int i; + int i, x, y, pressure, base; u32 buttons; if (len != 128) @@ -132,6 +146,42 @@ static int drc_raw_event(struct hid_device *hdev, struct hid_report *report, input_report_abs(drc->joy_input_dev, ABS_VOLUME, data[14]); input_sync(drc->joy_input_dev); + /* touch */ + /* + * Average touch points for improved accuracy. Sadly these are always + * reported extremely close from each other… Even when the user + * pressed two (or more) different points, all ten values will be + * approximately in the middle of the pressure points. + */ + x = y = 0; + for (i = 0; i < NUM_TOUCH_POINTS; i++) { + base = 36 + 4 * i; + + x += ((data[base + 1] & 0xF) << 8) | data[base]; + y += ((data[base + 3] & 0xF) << 8) | data[base + 2]; + } + x /= NUM_TOUCH_POINTS; + y /= NUM_TOUCH_POINTS; + + /* Pressure reporting isn’t properly understood, so we don’t report it yet. */ + pressure = 0; + pressure |= ((data[37] >> 4) & 7) << 0; + pressure |= ((data[39] >> 4) & 7) << 3; + pressure |= ((data[41] >> 4) & 7) << 6; + pressure |= ((data[43] >> 4) & 7) << 9; + + if (pressure != 0) { + input_report_key(drc->touch_input_dev, BTN_TOUCH, 1); + input_report_key(drc->touch_input_dev, BTN_TOOL_FINGER, 1); + + input_report_abs(drc->touch_input_dev, ABS_X, x); + input_report_abs(drc->touch_input_dev, ABS_Y, MAX_TOUCH_RES - y); + } else { + input_report_key(drc->touch_input_dev, BTN_TOUCH, 0); + input_report_key(drc->touch_input_dev, BTN_TOOL_FINGER, 0); + } + input_sync(drc->touch_input_dev); + /* let hidraw and hiddev handle the report */ return 0; } @@ -223,6 +273,30 @@ static bool drc_setup_joypad(struct drc *drc, return true; } +static bool drc_setup_touch(struct drc *drc, + struct hid_device *hdev) +{ + struct input_dev *input_dev; + + input_dev = allocate_and_setup(hdev, DEVICE_NAME " touchscreen"); + if (!input_dev) + return false; + + drc->touch_input_dev = input_dev; + + set_bit(INPUT_PROP_DIRECT, input_dev->propbit); + + input_set_abs_params(input_dev, ABS_X, TOUCH_BORDER_X, MAX_TOUCH_RES - TOUCH_BORDER_X, 20, 0); + input_abs_set_res(input_dev, ABS_X, RES_X / WIDTH); + input_set_abs_params(input_dev, ABS_Y, TOUCH_BORDER_Y, MAX_TOUCH_RES - TOUCH_BORDER_Y, 20, 0); + input_abs_set_res(input_dev, ABS_Y, RES_Y / HEIGHT); + + input_set_capability(input_dev, EV_KEY, BTN_TOUCH); + input_set_capability(input_dev, EV_KEY, BTN_TOOL_FINGER); + + return true; +} + static int drc_probe(struct hid_device *hdev, const struct hid_device_id *id) { struct drc *drc; @@ -242,8 +316,9 @@ static int drc_probe(struct hid_device *hdev, const struct hid_device_id *id) return ret; } - if (!drc_setup_joypad(drc, hdev)) { - hid_err(hdev, "could not allocate interface\n"); + if (!drc_setup_joypad(drc, hdev) || + !drc_setup_touch(drc, hdev)) { + hid_err(hdev, "could not allocate interfaces\n"); return -ENOMEM; } @@ -253,9 +328,10 @@ static int drc_probe(struct hid_device *hdev, const struct hid_device_id *id) return ret; } - ret = input_register_device(drc->joy_input_dev); + ret = input_register_device(drc->joy_input_dev) || + input_register_device(drc->touch_input_dev); if (ret) { - hid_err(hdev, "failed to register interface\n"); + hid_err(hdev, "failed to register interfaces\n"); return ret; }