From patchwork Thu Nov 7 11:47:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 841595 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 765C2200CA0; Thu, 7 Nov 2024 11:47:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.11.138.130 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730980078; cv=none; b=OC9nUF2e1qObzzY6S+nYUZX3SmPpZE2cX038Kgl7N/J1f6VR8meYdSxs06Gws8Xh65UYOkjnFYwx7LrPeGdsuBIltq0r1f0p3unRhCfKYaMTq/TNmZ7bV8YUq3xI0yiC0u6zK8DnZtunsMNQewjzndgG9btCHkCmJHL29bxH+Ow= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730980078; c=relaxed/simple; bh=ekP+J+Bhi72x0ML7mo8kmHopyu1e3X1/lyNPZFS4Z1Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KEUjzFk249UgYbPJXneF31eml7NfewVtYIVJkePp8vmQiIasy6AdYmo7Ra5N8goArWqx27Be8wxaOirwlNcP4zPYWKDlBnZvjX3SqxYiIQJ0c67HUWJ2M/r6QNs3KUlFyaHb6kcaKY8AQpqgPPS45jKHIHb6Aq02Ko+G4vsPAdU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sntech.de; spf=pass smtp.mailfrom=sntech.de; dkim=pass (2048-bit key) header.d=sntech.de header.i=@sntech.de header.b=L1l1ohYz; arc=none smtp.client-ip=185.11.138.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sntech.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sntech.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sntech.de header.i=@sntech.de header.b="L1l1ohYz" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=AkbOc3cbibJ6pZjyluyM/+M+k4gt1KmWg6RTkksjTKs=; b=L1l1ohYzJNoXAmGPs556J58WGO /K78ADjq4sdMlLWZxpX98XW0Qe2wi5Sy5/zmFYMXLEDfa4uE51JiVuODf9s/n2xkOAzg/goUHW6GQ uLQDwCGCIxznk3T88niDGh/q2tltu4JFz77ipJOxuqfsZur63CNjlxQwCRwMqd2+N54p4PNUxEKeH PaF2Owy/4YpOeZ56qLt/D9rQFe4J2qtCjDIWD1gtIbI0x93X1PyAbwsXapzxo5XBKPEDEJF53JrTu BvFrwMgrZBEYXYfmmLFXwx2sPEZhpYN7aaaAj4BWRHkj4pPjG5jIje01VFivFEzZoMU1d4LAD1pFF Mckza78w==; Received: from i53875b28.versanet.de ([83.135.91.40] helo=localhost.localdomain) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1t90z2-0005lF-TX; Thu, 07 Nov 2024 12:47:28 +0100 From: Heiko Stuebner To: lee@kernel.org, jikos@kernel.org, jic23@kernel.org Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, jdelvare@suse.com, linux@roeck-us.net, srinivas.pandruvada@linux.intel.com, bentiss@kernel.org, dmitry.torokhov@gmail.com, pavel@ucw.cz, ukleinek@debian.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-input@vger.kernel.org, linux-iio@vger.kernel.org, linux-leds@vger.kernel.org, heiko@sntech.de Subject: [PATCH v9 6/9] Input: add driver for the input part of qnap-mcu devices Date: Thu, 7 Nov 2024 12:47:09 +0100 Message-ID: <20241107114712.538976-7-heiko@sntech.de> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241107114712.538976-1-heiko@sntech.de> References: <20241107114712.538976-1-heiko@sntech.de> Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The MCU controls the power-button and beeper, so expose them as input device. There is of course no interrupt line, so the status of the power-button needs to be polled. To generate an event the power-button also needs to be held for 1-2 seconds, so the polling interval does not need to be overly fast. Acked-by: Dmitry Torokhov Signed-off-by: Heiko Stuebner --- MAINTAINERS | 1 + drivers/input/misc/Kconfig | 12 +++ drivers/input/misc/Makefile | 1 + drivers/input/misc/qnap-mcu-input.c | 153 ++++++++++++++++++++++++++++ 4 files changed, 167 insertions(+) create mode 100644 drivers/input/misc/qnap-mcu-input.c diff --git a/MAINTAINERS b/MAINTAINERS index 9abea0772d2b..9e66441c50da 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18881,6 +18881,7 @@ F: drivers/media/tuners/qm1d1c0042* QNAP MCU DRIVER M: Heiko Stuebner S: Maintained +F: drivers/input/misc/qnap-mcu-input.c F: drivers/leds/leds-qnap-mcu.c F: drivers/mfd/qnap-mcu.c F: include/linux/qnap-mcu.h diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 6a852c76331b..13d135257e06 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -917,6 +917,18 @@ config INPUT_HISI_POWERKEY To compile this driver as a module, choose M here: the module will be called hisi_powerkey. +config INPUT_QNAP_MCU + tristate "Input Support for QNAP MCU controllers" + depends on MFD_QNAP_MCU + help + This option enables support for input elements available on + embedded controllers used in QNAP NAS devices. + + This includes a polled power-button as well as a beeper. + + To compile this driver as a module, choose M here: the + module will be called qnap-mcu-input. + config INPUT_RAVE_SP_PWRBUTTON tristate "RAVE SP Power button Driver" depends on RAVE_SP_CORE diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 4f7f736831ba..6d91804d0a6f 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -68,6 +68,7 @@ obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o obj-$(CONFIG_INPUT_POWERMATE) += powermate.o obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o obj-$(CONFIG_INPUT_PWM_VIBRA) += pwm-vibra.o +obj-$(CONFIG_INPUT_QNAP_MCU) += qnap-mcu-input.o obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON) += rave-sp-pwrbutton.o obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o diff --git a/drivers/input/misc/qnap-mcu-input.c b/drivers/input/misc/qnap-mcu-input.c new file mode 100644 index 000000000000..76e62f0816c1 --- /dev/null +++ b/drivers/input/misc/qnap-mcu-input.c @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* + * Driver for input events on QNAP-MCUs + * + * Copyright (C) 2024 Heiko Stuebner + */ + +#include +#include +#include +#include +#include +#include + +/* + * The power-key needs to be pressed for a while to create an event, + * so there is no use for overly frequent polling. + */ +#define POLL_INTERVAL 500 + +struct qnap_mcu_input_dev { + struct input_dev *input; + struct qnap_mcu *mcu; + struct device *dev; + + struct work_struct beep_work; + int beep_type; +}; + +static void qnap_mcu_input_poll(struct input_dev *input) +{ + struct qnap_mcu_input_dev *idev = input_get_drvdata(input); + static const u8 cmd[] = { '@', 'C', 'V' }; + u8 reply[4]; + int state, ret; + + /* poll the power button */ + ret = qnap_mcu_exec(idev->mcu, cmd, sizeof(cmd), reply, sizeof(reply)); + if (ret) + return; + + /* First bytes must mirror the sent command */ + if (memcmp(cmd, reply, sizeof(cmd))) { + dev_err(idev->dev, "malformed data received\n"); + return; + } + + state = reply[3] - 0x30; + input_event(input, EV_KEY, KEY_POWER, state); + input_sync(input); +} + +static void qnap_mcu_input_beeper_work(struct work_struct *work) +{ + struct qnap_mcu_input_dev *idev = + container_of(work, struct qnap_mcu_input_dev, beep_work); + const u8 cmd[] = { '@', 'C', (idev->beep_type == SND_TONE) ? '3' : '2' }; + + qnap_mcu_exec_with_ack(idev->mcu, cmd, sizeof(cmd)); +} + +static int qnap_mcu_input_event(struct input_dev *input, unsigned int type, + unsigned int code, int value) +{ + struct qnap_mcu_input_dev *idev = input_get_drvdata(input); + + if (type != EV_SND || (code != SND_BELL && code != SND_TONE)) + return -EOPNOTSUPP; + + if (value < 0) + return -EINVAL; + + /* beep runtime is determined by the MCU */ + if (value == 0) + return 0; + + /* Schedule work to actually turn the beeper on */ + idev->beep_type = code; + schedule_work(&idev->beep_work); + + return 0; +} + +static void qnap_mcu_input_close(struct input_dev *input) +{ + struct qnap_mcu_input_dev *idev = input_get_drvdata(input); + + cancel_work_sync(&idev->beep_work); +} + +static int qnap_mcu_input_probe(struct platform_device *pdev) +{ + struct qnap_mcu *mcu = dev_get_drvdata(pdev->dev.parent); + struct qnap_mcu_input_dev *idev; + struct device *dev = &pdev->dev; + struct input_dev *input; + int ret; + + idev = devm_kzalloc(dev, sizeof(*idev), GFP_KERNEL); + if (!idev) + return -ENOMEM; + + input = devm_input_allocate_device(dev); + if (!input) + return dev_err_probe(dev, -ENOMEM, "no memory for input device\n"); + + idev->input = input; + idev->dev = dev; + idev->mcu = mcu; + + input_set_drvdata(input, idev); + + input->name = "qnap-mcu"; + input->phys = "qnap-mcu-input/input0"; + input->id.bustype = BUS_HOST; + input->id.vendor = 0x0001; + input->id.product = 0x0001; + input->id.version = 0x0100; + input->event = qnap_mcu_input_event; + input->close = qnap_mcu_input_close; + + input_set_capability(input, EV_KEY, KEY_POWER); + input_set_capability(input, EV_SND, SND_BELL); + input_set_capability(input, EV_SND, SND_TONE); + + INIT_WORK(&idev->beep_work, qnap_mcu_input_beeper_work); + + ret = input_setup_polling(input, qnap_mcu_input_poll); + if (ret) + return dev_err_probe(dev, ret, "unable to set up polling\n"); + + input_set_poll_interval(input, POLL_INTERVAL); + + ret = input_register_device(input); + if (ret) + return dev_err_probe(dev, ret, "unable to register input device\n"); + + return 0; +} + +static struct platform_driver qnap_mcu_input_driver = { + .probe = qnap_mcu_input_probe, + .driver = { + .name = "qnap-mcu-input", + }, +}; +module_platform_driver(qnap_mcu_input_driver); + +MODULE_ALIAS("platform:qnap-mcu-input"); +MODULE_AUTHOR("Heiko Stuebner "); +MODULE_DESCRIPTION("QNAP MCU input driver"); +MODULE_LICENSE("GPL");