From patchwork Tue Jun 8 22:31:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Oleh Kravchenko X-Patchwork-Id: 12308259 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=-21.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,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 14F2CC4743F for ; Tue, 8 Jun 2021 22:33:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF3E961361 for ; Tue, 8 Jun 2021 22:33:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229845AbhFHWfK (ORCPT ); Tue, 8 Jun 2021 18:35:10 -0400 Received: from smtp.220.in.ua ([89.184.67.205]:49495 "EHLO smtp.220.in.ua" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229548AbhFHWfK (ORCPT ); Tue, 8 Jun 2021 18:35:10 -0400 Received: from oleh-pc.lan (unknown [95.67.115.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.220.in.ua (Postfix) with ESMTPSA id 3C3FB1A20473; Wed, 9 Jun 2021 01:33:14 +0300 (EEST) From: Oleh Kravchenko To: linux-input@vger.kernel.org Cc: Oleh Kravchenko , Benjamin Tissoires , Device Tree mailing list , Dmitry Torokhov , Jiri Kosina , Patchwork Bot , Rob Herring , Jeff LaBundy Subject: [PATCH 2/2 v4] input: add SparkFun Qwiic Joystick driver Date: Wed, 9 Jun 2021 01:31:32 +0300 Message-Id: <20210608223130.16830-2-oleg@kaa.org.ua> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20210608223130.16830-1-oleg@kaa.org.ua> References: <20210608223130.16830-1-oleg@kaa.org.ua> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org A simple analog joystick built on Low Power ATtiny85 Microcontroller. Directional movements are measured with two 10 kΩ potentiometers connected with a gimbal mechanism that separates the horizontal and vertical movements. This joystick also has a select button that is actuated when the joystick is pressed down. Input events polled over the I2C bus. Product page: https://www.sparkfun.com/products/15168 Firmware and hardware sources: https://github.com/sparkfun/Qwiic_Joystick Tested on RPi4B and O4-iMX-NANO boards. Cc: Benjamin Tissoires Cc: Device Tree mailing list Cc: Dmitry Torokhov Cc: Jiri Kosina Cc: Patchwork Bot Cc: Rob Herring Signed-off-by: Oleh Kravchenko Reviewed-by: Jeff LaBundy --- Changes for v4: - alphabetize include headers. Changes for v3: - rebase patch for device tree before code. Changes for v2: - Separate patch for device tree bindings. drivers/input/joystick/Kconfig | 9 ++ drivers/input/joystick/Makefile | 1 + drivers/input/joystick/qwiic-joystick.c | 147 ++++++++++++++++++++++++ 3 files changed, 157 insertions(+) create mode 100644 drivers/input/joystick/qwiic-joystick.c diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig index 5e38899058c1..7dfe8ea90923 100644 --- a/drivers/input/joystick/Kconfig +++ b/drivers/input/joystick/Kconfig @@ -372,6 +372,15 @@ config JOYSTICK_PXRC To compile this driver as a module, choose M here: the module will be called pxrc. +config JOYSTICK_QWIIC + tristate "SparkFun Qwiic Joystick" + depends on I2C + help + Say Y here if you want to use the SparkFun Qwiic Joystick. + + To compile this driver as a module, choose M here: the + module will be called qwiic-joystick. + config JOYSTICK_FSIA6B tristate "FlySky FS-iA6B RC Receiver" select SERIO diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile index 31d720c9e493..5174b8aba2dd 100644 --- a/drivers/input/joystick/Makefile +++ b/drivers/input/joystick/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_JOYSTICK_MAPLE) += maplecontrol.o obj-$(CONFIG_JOYSTICK_N64) += n64joy.o obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) += psxpad-spi.o obj-$(CONFIG_JOYSTICK_PXRC) += pxrc.o +obj-$(CONFIG_JOYSTICK_QWIIC) += qwiic-joystick.o obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o obj-$(CONFIG_JOYSTICK_SPACEBALL) += spaceball.o obj-$(CONFIG_JOYSTICK_SPACEORB) += spaceorb.o diff --git a/drivers/input/joystick/qwiic-joystick.c b/drivers/input/joystick/qwiic-joystick.c new file mode 100644 index 000000000000..557708e9e756 --- /dev/null +++ b/drivers/input/joystick/qwiic-joystick.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 Oleh Kravchenko + * + * SparkFun Qwiic Joystick + * Product page:https://www.sparkfun.com/products/15168 + * Firmware and hardware sources:https://github.com/sparkfun/Qwiic_Joystick + */ + +#include +#include +#include +#include +#include + +#define DRV_NAME "qwiic-joystick" + +#define QWIIC_JSK_REG_VERS 1 +#define QWIIC_JSK_REG_DATA 3 + +#define QWIIC_JSK_MAX_AXIS GENMASK(9, 0) +#define QWIIC_JSK_FUZZ 2 +#define QWIIC_JSK_FLAT 2 +#define QWIIC_JSK_POLL_INTERVAL 16 +#define QWIIC_JSK_POLL_MIN 8 +#define QWIIC_JSK_POLL_MAX 32 + +struct qwiic_jsk { + char phys[32]; + struct input_dev *dev; + struct i2c_client *client; +}; + +struct qwiic_ver { + u8 major; + u8 minor; +}; + +struct qwiic_data { + __be16 x; + __be16 y; + u8 thumb; +} __packed; + +static void qwiic_poll(struct input_dev *input) +{ + struct qwiic_jsk *priv; + struct qwiic_data data; + int err; + + priv = input_get_drvdata(input); + + err = i2c_smbus_read_i2c_block_data(priv->client, QWIIC_JSK_REG_DATA, + sizeof(data), (u8 *)&data); + if (err != sizeof(data)) + return; + + input_report_abs(input, ABS_X, be16_to_cpu(data.x) >> 6); + input_report_abs(input, ABS_Y, be16_to_cpu(data.y) >> 6); + input_report_key(input, BTN_THUMBL, !data.thumb); + input_sync(input); +} + +static int qwiic_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct qwiic_jsk *priv; + struct qwiic_ver vers; + int err; + + err = i2c_smbus_read_i2c_block_data(client, QWIIC_JSK_REG_VERS, + sizeof(vers), (u8 *)&vers); + if (err < 0) + return err; + if (err != sizeof(vers)) + return -EIO; + + dev_dbg(&client->dev, "SparkFun Qwiic Joystick, FW: %u.%u\n", + vers.major, vers.minor); + + priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->client = client; + snprintf(priv->phys, sizeof(priv->phys), + "i2c/%s", dev_name(&client->dev)); + i2c_set_clientdata(client, priv); + + priv->dev = devm_input_allocate_device(&client->dev); + if (!priv->dev) + return -ENOMEM; + + priv->dev->id.bustype = BUS_I2C; + priv->dev->name = "SparkFun Qwiic Joystick"; + priv->dev->phys = priv->phys; + input_set_drvdata(priv->dev, priv); + + input_set_abs_params(priv->dev, ABS_X, 0, QWIIC_JSK_MAX_AXIS, + QWIIC_JSK_FUZZ, QWIIC_JSK_FLAT); + input_set_abs_params(priv->dev, ABS_Y, 0, QWIIC_JSK_MAX_AXIS, + QWIIC_JSK_FUZZ, QWIIC_JSK_FLAT); + input_set_capability(priv->dev, EV_KEY, BTN_THUMBL); + + err = input_setup_polling(priv->dev, qwiic_poll); + if (err) { + dev_err(&client->dev, "failed to set up polling: %d\n", err); + return err; + } + input_set_poll_interval(priv->dev, QWIIC_JSK_POLL_INTERVAL); + input_set_min_poll_interval(priv->dev, QWIIC_JSK_POLL_MIN); + input_set_max_poll_interval(priv->dev, QWIIC_JSK_POLL_MAX); + + err = input_register_device(priv->dev); + if (err) + dev_err(&client->dev, "failed to register joystick: %d\n", err); + + return err; +} + +#ifdef CONFIG_OF +static const struct of_device_id of_qwiic_match[] = { + { .compatible = "sparkfun,qwiic-joystick", }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_qwiic_match); +#endif /* CONFIG_OF */ + +static const struct i2c_device_id qwiic_id_table[] = { + { KBUILD_MODNAME, 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, qwiic_id_table); + +static struct i2c_driver qwiic_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(of_qwiic_match), + }, + .id_table = qwiic_id_table, + .probe = qwiic_probe, +}; +module_i2c_driver(qwiic_driver); + +MODULE_AUTHOR("Oleh Kravchenko "); +MODULE_DESCRIPTION("SparkFun Qwiic Joystick driver"); +MODULE_LICENSE("GPL v2");