From nobody Thu Oct 2 06:14:56 2025 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 835B91D7E5C for ; Sat, 20 Sep 2025 01:45:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758332729; cv=none; b=qqL6SPOOFH7Bdzekhcv7fMe8IkfFu2GqcKgZwFMksiWs5608Ddlg7VGACsaUQg0HM6rjMmiULp4+hnCfnYDrODFMgwyqdPPH/VodsPYZR0aPZZ7igbkw04d9neYVURpMuoD20Cq2Mxfxah8nDdxG16LRbp1r+hT4gSGQdjO72WA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758332729; c=relaxed/simple; bh=pBL+gVGPk5Oe6pgI0u7TV5kZR7rId+e7XFYkDX4Yyd8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Oda8caF61Nt/BtC8/jlJeDTzWglX1vC1RmzHPIuoKCOaZ+vVnNqY+imVrn0htGqdgz7WcVULKigAtTyfQf8JOcWxrtVp5tHNnz1658vknOTNnNxOD4QSqonBW/dKRbGFEfJtunsSnFmBNKRNWAy6XgnF6KoFEgTwxtbHaSkE7Kc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=g1mcR9M1; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="g1mcR9M1" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-76e4fc419a9so2758576b3a.0 for ; Fri, 19 Sep 2025 18:45:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1758332727; x=1758937527; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=0g3X7itFcaYd0uyiDe5Igj71JtDo3enYD8GOD7zyyH0=; b=g1mcR9M1H4OE/tqDUPn/KWIVoO7KDOIq7A+byt4N6uy/nsEuqGzOsAhDGuP3n2rFXm DOzRgfGiTezHK8VMmjK2TZz3cRROnk8Znv1Zt5XppCmnXC5lT8Nw0TQ3vZl64uLTdkzq gtyEeqY0upuagPp/Lt9hFD2nFGFn99ouzdQIIGbM4+K89MsCKPfBMw8T6Ggx0R5pmdTY Ifye1nDJqxyYTXxGjcJVJ5P3/uAW6j4SSft/oDeaYpsmu8wMi0/M8Z4ASDG5OTasl/6R gW/lNrtq1RA8hfave17gt5IEEnFiJybPcWIvgKJHDJ8cRzJMgh2nZpG2HcdxK8bAuPjs M9MA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758332727; x=1758937527; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0g3X7itFcaYd0uyiDe5Igj71JtDo3enYD8GOD7zyyH0=; b=W18gfB3mfp3opXma5TfZGW1D9C2IJOlxVMrmJASlmQcemWNfw3yOKwBUmNkaTmAMzx VAu6MACVHyPPwY7Y7s7GNuwDclHqswWrLWY/FXSOVz1anYlm50X+1QAPqY4NtIJEATFr AUC750wxOvJh4NwXvf8w86ZXGHvFKRfZ2NqWywBHlx4zL9Ytrq83csBPZPmwLZpYUc/d Nd/8zIVGOIA9WS8nW4aW1U6FuUcYlZBMuUFQ6W1C7yY/H5zRPk6OxTBP6hDI9/0E6POU RC3r5yzor0MTY/lwDZpy3Wo1HkhJUFslUr9e86BrvJ0nCz58yzmtPIEwXLjkITQquKDt xa9A== X-Forwarded-Encrypted: i=1; AJvYcCUpLPzPygBrqG1n5m1Ad0T+IqfFSr9bZymYOvkmtNwizIV/R5lGW6PFjC+uwirMP0BupGsiuKu0GQlhv3E=@vger.kernel.org X-Gm-Message-State: AOJu0YwY/wZt7Fc7iFVIPVSVWt6mIkleIr9vWOM/9KzRu/GOz97R9B7/ zKuLYTyT33tnpBZpk4jAO90R3HPmp8yDYtFQv8CjyGFFJpMBNhRsyn4Q X-Gm-Gg: ASbGncvycphcRap52weJvwOppCbEVxqadYGT2HhD+ROjCwdtrw5TIolcmzQUV83tttL LyU9SFmi4vsyAVrFywnsDcqXwvQMmkj4Iayr53qIFczhHqBtH+i1FgO2J7/PhvIGil4vlLVYszH VPjL5JWq7QA6MxH4hpC/1se0EG935/p/9r/i0uR+0DDTdVm4Lx/jZKwy6iXhbruu7fdEfWMENkY P0O8ae5IsHXU2CCpTw/m88LawQLwuPMHScllIb09JSPmIFQ3mWOc+dkVOZsuXh8g2Cnlk7MAdmY xPwwUYkQw/YsqlDDNW4FHD53LIhHfu5A3wgQDceSB0eu7oJ8gqyPB+r8m/n8Jc5rHQ/6Z3bFvDo x8MCo1ZuVMyREdCbKVNx8 X-Google-Smtp-Source: AGHT+IH46WKyw6dARtEBBxsg7fBtDAYRS7xjAqSCeJOf6ViP/DWyFWnfqtCB+n4K1vLBS6bTt8oifA== X-Received: by 2002:a05:6a00:b86:b0:76b:d869:43fd with SMTP id d2e1a72fcca58-77e4e5c39eemr6702571b3a.18.1758332726883; Fri, 19 Sep 2025 18:45:26 -0700 (PDT) Received: from archlinux ([191.193.70.152]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-77f1a72e7afsm529395b3a.92.2025.09.19.18.45.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Sep 2025 18:45:26 -0700 (PDT) From: =?UTF-8?q?Eric=20Gon=C3=A7alves?= To: Henrik Rydberg , Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Ivaylo Ivanov , devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 1/2] dt-bindings: input: Add ST-Microelectronics FTS2BA61Y touchscreen Date: Sat, 20 Sep 2025 01:44:49 +0000 Message-ID: <20250920014450.37787-2-ghatto404@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250920014450.37787-1-ghatto404@gmail.com> References: <20250920014450.37787-1-ghatto404@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Add the bindings for ST-Microelectronics FTS2BA61Y capacitive touchscreen. Signed-off-by: Eric Gon=C3=A7alves Reviewed-by: Rob Herring (Arm) --- .../input/touchscreen/st,fts2ba61y.yaml | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100755 Documentation/devicetree/bindings/input/touchscreen/st,= fts2ba61y.yaml diff --git a/Documentation/devicetree/bindings/input/touchscreen/st,fts2ba6= 1y.yaml b/Documentation/devicetree/bindings/input/touchscreen/st,fts2ba61y.= yaml new file mode 100644 index 000000000000..d5565b5360fc --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/st,fts2ba61y.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/touchscreen/st,fts2ba61y.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ST-Microelectronics FTS2BA61Y touchscreen controller + +maintainers: + - Ivaylo Ivanov + +allOf: + - $ref: touchscreen.yaml# + +properties: + compatible: + const: st,fts2ba61y + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + avdd-supply: true + vdd-supply: true + +required: + - compatible + - reg + - interrupts + - avdd-supply + - vdd-supply + +unevaluatedProperties: false + +examples: + - | + #include + spi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + touchscreen@0 { + compatible =3D "st,fts2ba61y"; + reg =3D <0x0>; + interrupt-parent =3D <&gpa2>; + interrupts =3D <2 IRQ_TYPE_LEVEL_HIGH>; + avdd-supply =3D <&ldo17_reg>; + vdd-supply =3D <&ldo28_reg>; + }; + }; --=20 2.51.0 From nobody Thu Oct 2 06:14:56 2025 Received: from mail-pf1-f182.google.com (mail-pf1-f182.google.com [209.85.210.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ECF881FE47B for ; Sat, 20 Sep 2025 01:45:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758332736; cv=none; b=fv9lINMIWlrDbLaDbLh9bKu/MWY/8unpJ2QknBRKkyuKDCHYk1KxKRbAFs1xoGwJ88xUNR71FfhL+EXLj7DHrL7jM0tkr1zvWXH71XpRDyo6qY6gTR0OTKYAuRik8KU5F3Wsl9GbaoCB0txd73Xh6z+eYobs2xA8F4YvwxuF+Co= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758332736; c=relaxed/simple; bh=o4qUOlDYmFq9xYpIrjy0Z2W5Dm+iG3WCVwV+xO9pyHQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iqx5Vf9bouwj5iQ1vVTkY+PKwjeFADEenHQNBaXztDKWy8pe9BIhdrQ3F8efy8anbp7FQF4nqNkL6qzwHMrMT0T96b0XHQ5goWzidsaeQ9sSzTjCQjSkWUaQnbaMf9LF1l3v4gs5EuZ1iCJggJpD4GqlMRyQvZ8DTAmHaMb3GFY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=VyukAlyL; arc=none smtp.client-ip=209.85.210.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VyukAlyL" Received: by mail-pf1-f182.google.com with SMTP id d2e1a72fcca58-76e6cbb991aso2421418b3a.1 for ; Fri, 19 Sep 2025 18:45:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1758332733; x=1758937533; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=xbwulDlTdWV1a2vX4sVnF8YoDTywRhMEwTux0md1QtA=; b=VyukAlyLNM6k5WDTSCZ7Qvt+1E2IGY8F5W+NxcYnKyIuV1J2Uhhvzl+SCqZnENkfwn 98ttgtOPjgtD/9YMTt4fX+a+8iGocXer6tCU4QuuKmUSzBF4gIrHGbt9Jubbv9SrjvaA Z7b/kOf3kVGFOfRuFGFx0jNKqCAIsXlgOI/oG7jYlTFAt2iT8MIwuxlkAhNz56nl18Ve 4htV9Zt7zbXUqPHqJEdCKDYS1Urh7n8/M7vWAQSsQF969fGySVQirLuvgNiMLJnc5qLg GDKGA+zBe9QKmOqlonEYa8mwVxyv/BhPnF4A1GUb1TN8GxWKrLgCI1CDRAUg1nKU6onx u/Og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758332733; x=1758937533; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=xbwulDlTdWV1a2vX4sVnF8YoDTywRhMEwTux0md1QtA=; b=eBTcqaHC0MPMHPz449gLyC4n3wuzL91CN+9xB7K7V05epTN89r67vjB9IdkMWvONRd UxT1/YcZMQh40DJerJ1/Y5qDZbRbx/f9oTXUcuzRsS9Frp/DPLbX804Jwdgtz7tTS7f6 D6qJyJ/Qoy16SV6F54e6MFKvP64uIIBnAEGYa//vJLTKGo+dl+rhPkaI5J6Hn3Qnj4qB r2mU4ujiKZyYVvlUc83QhkKDA5z9mOEPKnBhXxYWVzu3fKz/Sz/OeJFpbewjWsIZXLom tO5FFNkO4bDXs4dMqOEAgwwAwdSbRbiwsn8uV0iv5KYDlg0o+U0IMZ93rysc+kYuHLrz 7LYw== X-Forwarded-Encrypted: i=1; AJvYcCV2VIg1KEBeYKKSWG7LxOlj6JnppeTKjTo+EBghbg0K2GzYmeIhvshEaaxLUMigKkyWhdW1SFLufCai678=@vger.kernel.org X-Gm-Message-State: AOJu0YwsLARDSv23d6abN7sUqhfzcxN7idFKBQzCd33bFXpDrYaUoxc4 mLvi3f5k3ccxUzuxBDKc9JLmIRfWyFllQeJVmp9QbwPacujbn8I8cPyS X-Gm-Gg: ASbGnctYcHKaE8yT7TAZDvcr3e3zEBBnv6bcgE8/yTZSv0zJiNdX+aw18xabV6qtwRp BempyGpq525AMhqJZpGmglgynobq+qh9oGBw0pxKRnmqqDmGSqCe+8QwODPG3605bAsz4kUhM2v LJU47xZAUnS1kZWTiu/bpAL0avX/cU1vBfUltuKorb7/8bS+OJQEPZ8dSVNip/EZ5HmpQNP5vB0 /4taBAqvbkOQMkYqWSQxV63JBgGRHlh/cFd8a8YR7ibFKI1derK69pO6L23q+IFyW5bK+U5zEj+ Pu7XDxnjlWDO02rhJB2gEI6Y0e4DIVIKnnjkgK3xnIwZv+D79pU+yaa4cn/wTCD+9Dx9lGD2nHK ID3HRrvVsoCpkVHEJ/ZiS X-Google-Smtp-Source: AGHT+IFrfFS/+61ivOxGlktBEadH3PUIFPWX62BhORRzrKhDDIyeIyMbitDikCHEeefgfbYt7GLMVQ== X-Received: by 2002:a05:6a00:2394:b0:771:f951:16c6 with SMTP id d2e1a72fcca58-77e4eeac840mr5785114b3a.15.1758332733062; Fri, 19 Sep 2025 18:45:33 -0700 (PDT) Received: from archlinux ([191.193.70.152]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-77f1a72e7afsm529395b3a.92.2025.09.19.18.45.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Sep 2025 18:45:32 -0700 (PDT) From: =?UTF-8?q?Eric=20Gon=C3=A7alves?= To: Henrik Rydberg , Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Ivaylo Ivanov , devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 2/2] Input: add support for the STM FTS2BA61Y touchscreen Date: Sat, 20 Sep 2025 01:44:50 +0000 Message-ID: <20250920014450.37787-3-ghatto404@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250920014450.37787-1-ghatto404@gmail.com> References: <20250920014450.37787-1-ghatto404@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The ST-Microelectronics FTS2BA61Y touchscreen is a capacitive multi-touch controller connected through SPI at 0x0, the touchscreen is typically used in mobile devices (like the Galaxy S22 series) Signed-off-by: Ivaylo Ivanov Signed-off-by: Eric Gon=C3=A7alves --- drivers/input/touchscreen/Kconfig | 11 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/fts2ba61y.c | 588 ++++++++++++++++++++++++++ 3 files changed, 600 insertions(+) create mode 100644 drivers/input/touchscreen/fts2ba61y.c diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/= Kconfig index 196905162945..1e199191f527 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -370,6 +370,17 @@ config TOUCHSCREEN_EXC3000 To compile this driver as a module, choose M here: the module will be called exc3000. =20 +config TOUCHSCREEN_FTS2BA61Y + tristate "ST-Microelectronics FTS2BA61Y touchscreen" + depends on SPI + help + Say Y here if you have the ST-Microelectronics FTS2BA61Y touchscreen + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called fts2ba61y. + config TOUCHSCREEN_FUJITSU tristate "Fujitsu serial touchscreen" select SERIO diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen= /Makefile index 97a025c6a377..408a9fd5bd35 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_TOUCHSCREEN_ELO) +=3D elo.o obj-$(CONFIG_TOUCHSCREEN_EGALAX) +=3D egalax_ts.o obj-$(CONFIG_TOUCHSCREEN_EGALAX_SERIAL) +=3D egalax_ts_serial.o obj-$(CONFIG_TOUCHSCREEN_EXC3000) +=3D exc3000.o +obj-$(CONFIG_TOUCHSCREEN_FTS2BA61Y) +=3D fts2ba61y.o obj-$(CONFIG_TOUCHSCREEN_FUJITSU) +=3D fujitsu_ts.o obj-$(CONFIG_TOUCHSCREEN_GOODIX) +=3D goodix_ts.o obj-$(CONFIG_TOUCHSCREEN_GOODIX_BERLIN_CORE) +=3D goodix_berlin_core.o diff --git a/drivers/input/touchscreen/fts2ba61y.c b/drivers/input/touchscr= een/fts2ba61y.c new file mode 100644 index 000000000000..b3b3abca5404 --- /dev/null +++ b/drivers/input/touchscreen/fts2ba61y.c @@ -0,0 +1,588 @@ +// SPDX-License-Identifier: GPL-2.0 +// Based loosely on s6sy761.c + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* commands */ +#define FTS2BA61Y_CMD_SENSE_ON 0x10 +#define FTS2BA61Y_CMD_SENSE_OFF 0x11 +#define FTS2BA61Y_CMD_READ_PANEL_INFO 0x23 +#define FTS2BA61Y_CMD_READ_FW_VER 0x24 +#define FTS2BA61Y_CMD_TOUCHTYPE 0x30 /* R/W for get/set */ +#define FTS2BA61Y_CMD_CLEAR_EVENTS 0x62 +#define FTS2BA61Y_CMD_READ_EVENT 0x87 +#define FTS2BA61Y_CMD_CUSTOM_W 0xC0 +#define FTS2BA61Y_CMD_CUSTOM_R 0xD1 +#define FTS2BA61Y_CMD_REG_W 0xFA +#define FTS2BA61Y_CMD_REG_R 0xFB + +/* touch type masks */ +#define FTS2BA61Y_MASK_TOUCH BIT(0) +#define FTS2BA61Y_MASK_HOVER BIT(1) +#define FTS2BA61Y_MASK_COVER BIT(2) +#define FTS2BA61Y_MASK_GLOVE BIT(3) +#define FTS2BA61Y_MASK_STYLUS BIT(4) +#define FTS2BA61Y_MASK_PALM BIT(5) +#define FTS2BA61Y_MASK_WET BIT(6) +#define FTS2BA61Y_TOUCHTYPE_DEFAULT (FTS2BA61Y_MASK_TOUCH | \ + FTS2BA61Y_MASK_PALM | \ + FTS2BA61Y_MASK_WET) + +/* event status masks */ +#define FTS2BA61Y_MASK_STYPE GENMASK(5, 2) +#define FTS2BA61Y_MASK_EVENT_ID GENMASK(1, 0) + +/* event coordinate masks */ +#define FTS2BA61Y_MASK_TCHSTA GENMASK(7, 6) +#define FTS2BA61Y_MASK_TID GENMASK(5, 2) +#define FTS2BA61Y_MASK_X_3_0 GENMASK(7, 4) +#define FTS2BA61Y_MASK_Y_3_0 GENMASK(3, 0) +#define FTS2BA61Y_MASK_Z GENMASK(5, 0) +#define FTS2BA61Y_MASK_TTYPE_3_2 GENMASK(7, 6) +#define FTS2BA61Y_MASK_TTYPE_1_0 GENMASK(1, 0) +#define FTS2BA61Y_MASK_LEFT_EVENTS GENMASK(4, 0) + +/* event error status */ +#define FTS2BA61Y_EVENT_STATUSTYPE_INFO 0x2 + +/* information report */ +#define FTS2BA61Y_INFO_READY_STATUS 0x0 + +/* event status */ +#define FTS2BA61Y_COORDINATE_EVENT 0x0 + +/* touch types */ +#define FTS2BA61Y_TOUCHTYPE_NORMAL 0x0 +#define FTS2BA61Y_TOUCHTYPE_HOVER 0x1 +#define FTS2BA61Y_TOUCHTYPE_FLIPCOVER 0x2 +#define FTS2BA61Y_TOUCHTYPE_GLOVE 0x3 +#define FTS2BA61Y_TOUCHTYPE_STYLUS 0x4 +#define FTS2BA61Y_TOUCHTYPE_PALM 0x5 +#define FTS2BA61Y_TOUCHTYPE_WET 0x6 +#define FTS2BA61Y_TOUCHTYPE_PROXIMITY 0x7 +#define FTS2BA61Y_TOUCHTYPE_JIG 0x8 + +#define FTS2BA61Y_COORDINATE_ACTION_NONE 0x0 +#define FTS2BA61Y_COORDINATE_ACTION_PRESS 0x1 +#define FTS2BA61Y_COORDINATE_ACTION_MOVE 0x2 +#define FTS2BA61Y_COORDINATE_ACTION_RELEASE 0x3 + +#define FTS2BA61Y_DEV_NAME "fts2ba61y" +#define FTS2BA61Y_EVENT_BUFF_SIZE 16 +#define FTS2BA61Y_PANEL_INFO_SIZE 11 +#define FTS2BA61Y_RESET_CMD_SIZE 5 +#define FTS2BA61Y_EVENT_COUNT 31 +#define MAX_TRANSFER_SIZE 256 + +enum fts2ba61y_regulators { + FTS2BA61Y_REGULATOR_VDD, + FTS2BA61Y_REGULATOR_AVDD, +}; + +struct fts2ba61y_data { + struct spi_device *spi; + struct regulator_bulk_data regulators[2]; + struct input_dev *input_dev; + struct mutex mutex; + struct touchscreen_properties prop; + + u8 tx_count; + + unsigned int max_x; + unsigned int max_y; +}; + +static int fts2ba61y_write(struct fts2ba61y_data *ts, + u8 *reg, int cmd_len, u8 *data, int data_len) +{ + struct spi_message msg; + struct spi_transfer xfers; + char *tx_buf; + int len; + int ret; + + tx_buf =3D kzalloc(cmd_len + data_len + 1, GFP_KERNEL); + if (!tx_buf) { + ret =3D -ENOMEM; + goto out; + } + + memset(&xfers, 0, sizeof(xfers)); + spi_message_init(&msg); + + memcpy(&tx_buf[0], reg, cmd_len); + if (data_len && data) + memcpy(&tx_buf[cmd_len], data, data_len); + + len =3D cmd_len + data_len; + + /* custom write cmd */ + if (reg[0] !=3D FTS2BA61Y_CMD_REG_W && + reg[0] !=3D FTS2BA61Y_CMD_REG_R) { + memmove(tx_buf + 1, tx_buf, len); + tx_buf[0] =3D FTS2BA61Y_CMD_CUSTOM_W; + len++; + } + + xfers.len =3D len; + xfers.tx_buf =3D tx_buf; + + spi_message_add_tail(&xfers, &msg); + + mutex_lock(&ts->mutex); + ret =3D spi_sync(ts->spi, &msg); + if (ret) + dev_err(&ts->spi->dev, "spi transfer error, %d", ret); + mutex_unlock(&ts->mutex); + +out: + kfree(tx_buf); + return ret; +} + +static int fts2ba61y_spi_raw_read(struct fts2ba61y_data *ts, + u8 *tx_buf, u8 *rx_buf, int len) +{ + struct spi_message msg; + struct spi_transfer xfer; + int ret; + + memset(&xfer, 0, sizeof(xfer)); + spi_message_init(&msg); + + xfer.len =3D len; + xfer.tx_buf =3D tx_buf; + xfer.rx_buf =3D rx_buf; + spi_message_add_tail(&xfer, &msg); + + mutex_lock(&ts->mutex); + ret =3D spi_sync(ts->spi, &msg); + if (ret) + dev_err(&ts->spi->dev, "spi transfer error, %d", ret); + mutex_unlock(&ts->mutex); + + return ret; +} + +/* + * higher-level wrapper that prepares the buffers for a read. + */ +static int fts2ba61y_read(struct fts2ba61y_data *ts, + u8 reg[], int tx_len, u8 buf[], int rx_len) +{ + char *tx_buf, *rx_buf; + int ret, mem_len; + u16 reg_val; + + if (tx_len > 3) + mem_len =3D rx_len + 1 + tx_len; + else + mem_len =3D rx_len + 4; + + tx_buf =3D kzalloc(mem_len, GFP_KERNEL); + rx_buf =3D kzalloc(mem_len, GFP_KERNEL); + if (!tx_buf || !rx_buf) { + ret =3D -ENOMEM; + goto out; + } + + switch (reg[0]) { + case FTS2BA61Y_CMD_READ_EVENT: + case FTS2BA61Y_CMD_REG_W: + case FTS2BA61Y_CMD_REG_R: + memcpy(tx_buf, reg, tx_len); + break; + + default: + tx_buf[0] =3D FTS2BA61Y_CMD_CUSTOM_R; + + if (tx_len =3D=3D 1) + reg_val =3D 0; + else if (tx_len =3D=3D 2) + reg_val =3D reg[0]; + else if (tx_len =3D=3D 3) + reg_val =3D reg[0] | (reg[1] << 8); + else { + ret =3D -EINVAL; + goto out; + } + + tx_len =3D 3; + put_unaligned_be16(reg_val, &tx_buf[1]); + + ret =3D fts2ba61y_write(ts, reg, 1, NULL, 0); + if (ret < 0) + goto out; + break; + } + + ret =3D fts2ba61y_spi_raw_read(ts, tx_buf, rx_buf, rx_len + 1 + tx_len); + if (ret < 0) + goto out; + + memcpy(buf, &rx_buf[1 + tx_len], rx_len); + +out: + kfree(tx_buf); + kfree(rx_buf); + return ret; +} + +static int fts2ba61y_wait_for_ready(struct fts2ba61y_data *ts) +{ + u8 buffer[FTS2BA61Y_EVENT_BUFF_SIZE]; + u8 cmd =3D FTS2BA61Y_CMD_READ_EVENT; + u8 status_id, stype; + int ret; + + for (int retries =3D 5; retries > 0; retries--) { + ret =3D fts2ba61y_read(ts, &cmd, 1, buffer, FTS2BA61Y_EVENT_BUFF_SIZE); + + stype =3D FIELD_GET(FTS2BA61Y_MASK_STYPE, buffer[0]); + status_id =3D buffer[1]; + + if (stype =3D=3D FTS2BA61Y_EVENT_STATUSTYPE_INFO && + status_id =3D=3D FTS2BA61Y_INFO_READY_STATUS) { + ret =3D 0; + break; + } else + ret =3D -ENODEV; + + msleep(20); + } + + return ret; +} + +static int fts2ba61y_reset(struct fts2ba61y_data *ts) +{ + u8 cmd =3D FTS2BA61Y_CMD_REG_W; + /* the following sequence is undocumented */ + u8 reset[FTS2BA61Y_RESET_CMD_SIZE] =3D { 0x20, 0x00, + 0x00, 0x24, 0x81 }; + int ret; + + disable_irq(ts->spi->irq); + + ret =3D fts2ba61y_write(ts, &cmd, 1, &reset[0], FTS2BA61Y_RESET_CMD_SIZE); + if (ret) + return ret; + msleep(30); + + ret =3D fts2ba61y_wait_for_ready(ts); + if (ret) + return ret; + + enable_irq(ts->spi->irq); + + return 0; +} + +static int fts2ba61y_set_channels(struct fts2ba61y_data *ts) +{ + int ret; + u8 cmd =3D FTS2BA61Y_CMD_READ_PANEL_INFO; + u8 data[FTS2BA61Y_PANEL_INFO_SIZE]; + + ret =3D fts2ba61y_read(ts, &cmd, 1, data, FTS2BA61Y_PANEL_INFO_SIZE); + if (ret) + return ret; + + ts->max_x =3D get_unaligned_be16(data); + ts->max_y =3D get_unaligned_be16(data + 2); + + /* if no tx channels defined, at least keep one */ + ts->tx_count =3D max_t(u8, data[8], 1); + + return 0; +} + +static int fts2ba61y_set_touch_func(struct fts2ba61y_data *ts) +{ + u8 cmd =3D FTS2BA61Y_CMD_TOUCHTYPE; + u16 touchtype =3D cpu_to_le16(FTS2BA61Y_TOUCHTYPE_DEFAULT); + + return fts2ba61y_write(ts, &cmd, 1, (u8 *)&touchtype, 2); +} + +static int fts2ba61y_hw_init(struct fts2ba61y_data *ts) +{ + int ret; + + ret =3D regulator_bulk_enable(ARRAY_SIZE(ts->regulators), + ts->regulators); + if (ret) + return ret; + + msleep(140); + + ret =3D fts2ba61y_reset(ts); + if (ret) + return ret; + + ret =3D fts2ba61y_set_channels(ts); + if (ret) + return ret; + + return fts2ba61y_set_touch_func(ts); +} + +static int fts2ba61y_get_event(struct fts2ba61y_data *ts, u8 *data, int *n= _events) +{ + int ret; + u8 cmd =3D FTS2BA61Y_CMD_READ_EVENT; + + ret =3D fts2ba61y_read(ts, &cmd, 1, data, FTS2BA61Y_EVENT_BUFF_SIZE); + if (ret < 0) + return ret; + + if (!data[0]) { + *n_events =3D 0; + return 0; + } + + *n_events =3D FIELD_GET(FTS2BA61Y_MASK_LEFT_EVENTS, data[7]); + if (unlikely(*n_events >=3D FTS2BA61Y_EVENT_COUNT)) { + cmd =3D FTS2BA61Y_CMD_CLEAR_EVENTS; + fts2ba61y_write(ts, &cmd, 1, NULL, 0); + *n_events =3D 0; + return -EINVAL; + } + + if (*n_events > 0) { + ret =3D fts2ba61y_read(ts, &cmd, 1, + &data[1 * FTS2BA61Y_EVENT_BUFF_SIZE], + FTS2BA61Y_EVENT_BUFF_SIZE * (*n_events)); + if (ret) + return ret; + } + + return 0; +} + +static void fts2ba61y_report_coordinates(struct fts2ba61y_data *ts, + u8 *event, u8 tid) +{ + u8 major =3D event[4]; + u8 minor =3D event[5]; + u8 z =3D FIELD_GET(FTS2BA61Y_MASK_Z, event[6]); + + u16 x =3D (event[1] << 4) | + FIELD_GET(FTS2BA61Y_MASK_X_3_0, event[3]); + u16 y =3D (event[2] << 4) | + FIELD_GET(FTS2BA61Y_MASK_Y_3_0, event[3]); + u16 ttype =3D (FIELD_GET(FTS2BA61Y_MASK_TTYPE_3_2, event[6]) << 2) | + (FIELD_GET(FTS2BA61Y_MASK_TTYPE_1_0, event[7]) << 0); + + if (ttype !=3D FTS2BA61Y_TOUCHTYPE_NORMAL && + ttype !=3D FTS2BA61Y_TOUCHTYPE_PALM && + ttype !=3D FTS2BA61Y_TOUCHTYPE_WET && + ttype !=3D FTS2BA61Y_TOUCHTYPE_GLOVE) + return; + + input_mt_slot(ts->input_dev, tid); + input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); + input_report_abs(ts->input_dev, ABS_MT_POSITION_X, x); + input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, y); + input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, major); + input_report_abs(ts->input_dev, ABS_MT_TOUCH_MINOR, minor); + input_report_abs(ts->input_dev, ABS_MT_PRESSURE, z); + + input_mt_sync_frame(ts->input_dev); + input_sync(ts->input_dev); +} + +static void fts2ba61y_report_release(struct fts2ba61y_data *ts, u8 tid) +{ + input_mt_slot(ts->input_dev, tid); + input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, false); + + input_mt_sync_frame(ts->input_dev); + input_sync(ts->input_dev); +} + +static void fts2ba61y_handle_coordinates(struct fts2ba61y_data *ts, u8 *ev= ent) +{ + u8 t_id =3D FIELD_GET(FTS2BA61Y_MASK_TID, event[0]); + u8 action =3D FIELD_GET(FTS2BA61Y_MASK_TCHSTA, event[0]); + + if (t_id > ts->tx_count) + return; + + switch (action) { + case FTS2BA61Y_COORDINATE_ACTION_PRESS: + case FTS2BA61Y_COORDINATE_ACTION_MOVE: + fts2ba61y_report_coordinates(ts, event, t_id); + break; + + case FTS2BA61Y_COORDINATE_ACTION_RELEASE: + fts2ba61y_report_release(ts, t_id); + break; + } +} + +static irqreturn_t fts2ba61y_irq_handler(int irq, void *handle) +{ + struct fts2ba61y_data *ts =3D handle; + u8 buffer[FTS2BA61Y_EVENT_COUNT * FTS2BA61Y_EVENT_BUFF_SIZE]; + u8 *event; + u8 event_id; + int n_events =3D 0; + int ret; + + usleep(1); + + ret =3D fts2ba61y_get_event(ts, buffer, &n_events); + if (ret < 0) { + dev_dbg(&ts->spi->dev, "failed to get event: %d", ret); + return IRQ_HANDLED; + } + + for (int i =3D 0; i <=3D n_events; i++) { + event =3D &buffer[i * FTS2BA61Y_EVENT_BUFF_SIZE]; + event_id =3D FIELD_GET(FTS2BA61Y_MASK_EVENT_ID, event[0]); + + if (event_id =3D=3D FTS2BA61Y_COORDINATE_EVENT) + fts2ba61y_handle_coordinates(ts, event); + } + + return IRQ_HANDLED; +} + +static int fts2ba61y_input_open(struct input_dev *dev) +{ + struct fts2ba61y_data *ts =3D input_get_drvdata(dev); + u8 cmd =3D FTS2BA61Y_CMD_SENSE_ON; + + return fts2ba61y_write(ts, &cmd, 1, NULL, 0); +} + +static void fts2ba61y_input_close(struct input_dev *dev) +{ + struct fts2ba61y_data *ts =3D input_get_drvdata(dev); + int ret; + u8 cmd =3D FTS2BA61Y_CMD_SENSE_OFF; + + ret =3D fts2ba61y_write(ts, &cmd, 1, NULL, 0); + if (ret) + dev_err(&ts->spi->dev, "failed to turn off sensing\n"); +} + +static void fts2ba61y_power_off(void *data) +{ + struct fts2ba61y_data *ts =3D data; + + disable_irq(ts->spi->irq); + regulator_bulk_disable(ARRAY_SIZE(ts->regulators), + ts->regulators); +} + +static int fts2ba61y_probe(struct spi_device *spi) { + struct fts2ba61y_data *ts; + struct input_dev *input_dev; + int error; + + ts =3D devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL); + if (!ts) + return -ENOMEM; + + ts->spi =3D spi; + mutex_init(&ts->mutex); + + spi->mode =3D SPI_MODE_0; + spi->bits_per_word =3D 8; + + error =3D spi_setup(spi); + if (error) + return error; + + ts->regulators[FTS2BA61Y_REGULATOR_VDD].supply =3D "vdd"; + ts->regulators[FTS2BA61Y_REGULATOR_AVDD].supply =3D "avdd"; + error =3D devm_regulator_bulk_get(&spi->dev, + ARRAY_SIZE(ts->regulators), + ts->regulators); + if (error) + return error; + + error =3D fts2ba61y_hw_init(ts); + if (error) + return error; + + error =3D devm_add_action_or_reset(&ts->spi->dev, fts2ba61y_power_off, ts= ); + if (error) + return error; + + input_dev =3D devm_input_allocate_device(&spi->dev); + if (!input_dev) + return -ENOMEM; + + ts->input_dev =3D input_dev; + + input_dev->name =3D FTS2BA61Y_DEV_NAME; + input_dev->id.bustype =3D BUS_SPI; + input_dev->open =3D fts2ba61y_input_open; + input_dev->close =3D fts2ba61y_input_close; + + input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0); + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); + input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); + input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0); + + touchscreen_parse_properties(input_dev, true, &ts->prop); + + spi_set_drvdata(spi, ts); + input_set_drvdata(input_dev, ts); + + error =3D input_mt_init_slots(input_dev, ts->tx_count, INPUT_MT_DIRECT); + if (error) + return error; + + error =3D input_register_device(input_dev); + if (error) + return error; + + error =3D devm_request_threaded_irq(&spi->dev, spi->irq, NULL, + fts2ba61y_irq_handler, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "fts2ba61y_irq", ts); + return error; +} + +#ifdef CONFIG_OF +static const struct of_device_id spi_touchscreen_dt_ids[] =3D { + { .compatible =3D "st,fts2ba61y" }, + {}, +}; +MODULE_DEVICE_TABLE(of, spi_touchscreen_dt_ids); +#endif + +static const struct spi_device_id fts2ba61y_spi_ids[] =3D { + { "fts2ba61y" }, + { }, +}; +MODULE_DEVICE_TABLE(spi, fts2ba61y_spi_ids); + +static struct spi_driver spi_touchscreen_driver =3D { + .driver =3D { + .name =3D FTS2BA61Y_DEV_NAME, + .of_match_table =3D of_match_ptr(spi_touchscreen_dt_ids), + }, + .probe =3D fts2ba61y_probe, + .id_table =3D fts2ba61y_spi_ids, +}; + +module_spi_driver(spi_touchscreen_driver); + +MODULE_AUTHOR("Ivaylo Ivanov "); +MODULE_DESCRIPTION("ST-Microelectronics FTS2BA61Y Touch Screen"); +MODULE_LICENSE("GPL"); --=20 2.51.0