From patchwork Wed May 1 12:27:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Koch X-Patchwork-Id: 10925041 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BA315933 for ; Wed, 1 May 2019 12:27:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A6FA128D3B for ; Wed, 1 May 2019 12:27:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9AA8628E16; Wed, 1 May 2019 12:27:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD5D128D3B for ; Wed, 1 May 2019 12:27:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726083AbfEAM1q (ORCPT ); Wed, 1 May 2019 08:27:46 -0400 Received: from mout.kundenserver.de ([212.227.126.133]:47125 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725971AbfEAM1p (ORCPT ); Wed, 1 May 2019 08:27:45 -0400 Received: from w520.fritz.box ([46.223.3.92]) by mrelayeu.kundenserver.de (mreue010 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MsZBb-1gT23R0LYx-00u3Nj; Wed, 01 May 2019 14:27:42 +0200 From: Markus Koch To: Dmitry Torokhov Cc: linux-input@vger.kernel.org, Markus Koch Subject: [PATCH] Input: add support for the FlySky FS-iA6B RC receiver Date: Wed, 1 May 2019 14:27:47 +0200 Message-Id: <20190501122745.1322-1-markus@notsyncing.net> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-Provags-ID: V03:K1:8ZEiI9fSaZsAknVSvk7bkDohHk8w7JhoqCrO8gpWE+huial5GdR /JPTpE/H+CJ9aI20sJjX5qKA5IFQGlh/+N5MPyWofenBBIlocG+Oh9Z/jxGlZkPjWo0g3LH WiZekEy6jtMltYu+743ak0YFFTIZ7aTalxZyttC5xGs/lBsJ88BDAGVSf8fU9ii9kSuaqmo zZIpTu8y3WVBj+Kt4HejA== X-UI-Out-Filterresults: notjunk:1;V03:K0:ZwG3TKKvH8I=:WgCxM4tre3lcvcCKpdnBpz L1vwFL0spXkihpnDKK3SaekNSyZCtsYJRIiC3cFLSEP2a48inrBqqlz1dZDse62Jfdja9PcPD e/Vm7LpisEQB7plmdWRBRFB+Giy1D59artYGZnzrMiwTCHo008RJH8RRGxxOzfjOdxxJFP42x vwOIekXe6Uew1s8YXtRpU8oXiZZePc8MmarwfEFCl1EtzDT23OHV5gGPqknD7itxSD/5oBlPZ XhL70sQDyVuVTfF88hve5/0OM1/LYYq5zxibAWQa1XW++UC6kK5Kr2voWX0j5eMvDBIkwNWV1 GoRV5oDHfixp5PJFvhGWi0nZzSzVsAphBLHetSm/P9/vTU5tjT4IIUqVXfyaKwneiPZ34PWJ2 xdTFmWRnhHWLHc437SpJc+IOR5T94w0SEma4y9R0B2o4K3z8iRXUkjE+YtCHQBudf6HtKZWhY lW4g8Yco0lvZaq7HUPWIDSo738kiqeLMhzQbF4IkLWTu6SN5hBlvJmm1eW9gu7UQKzEzQog5R ygWkQzpTTjvyXs9nRrwjak4FutXe8Yp1fUaioCHvPhKcAF3Viwy0OnDuFzx6qOlgeXC4u7L2w cGtW3PxHbX8bHRGIUV0nrGDF/HA7uPP+McykPwGLWJ2YzNLKNkzba1aSk+I9Me0n9SFfN+IZQ WRe0OSJHFxURJo15JRtyh8IOEeEd4ETf/Y3UH7pkMCijWssIAj5chIp0i/bsEKZOA1GNH+hHP F0npOaKc7Ma+Jf4UO/GjN4IFSlDwA4TK0znblA== Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for the FlySky FS-iA6B RC receiver (serial IBUS). It allows the usage of the FlySky FS-i6 and other AFHDS compliant remote controls as a joystick input device. To use it, a patch to inputattach which adds the FS-iA6B as a 115200 baud serial device is required. I will upstream it after this patch is merged. More information about the hardware can be found here: https://notsyncing.net/?p=blog&b=2018.linux-fsia6b Signed-off-by: Markus Koch --- MAINTAINERS | 6 + drivers/input/joystick/Kconfig | 10 ++ drivers/input/joystick/Makefile | 1 + drivers/input/joystick/fsia6b.c | 255 ++++++++++++++++++++++++++++++++ include/uapi/linux/serio.h | 1 + 5 files changed, 273 insertions(+) create mode 100644 drivers/input/joystick/fsia6b.c diff --git a/MAINTAINERS b/MAINTAINERS index f3a5c97e3419..f6d404274d45 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11779,6 +11779,12 @@ S: Maintained F: Documentation/input/devices/pxrc.rst F: drivers/input/joystick/pxrc.c +FLYSKY FSIA6B RC RECEIVER +M: Markus Koch +L: linux-input@vger.kernel.org +S: Maintained +F: drivers/input/joystick/fsia6b.c + PHONET PROTOCOL M: Remi Denis-Courmont S: Supported diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig index d8f9c6e1fc08..0eb87013823d 100644 --- a/drivers/input/joystick/Kconfig +++ b/drivers/input/joystick/Kconfig @@ -361,4 +361,14 @@ config JOYSTICK_PXRC To compile this driver as a module, choose M here: the module will be called pxrc. +config JOYSTICK_FSIA6B + tristate "FlySky FS-iA6B RC Receiver" + select SERIO + help + Say Y here if you use a FlySky FS-i6 RC remote control along with the + FS-iA6B RC receiver as a joystick input device. + + To compile this driver as a module, choose M here: the + module will be called fsia6b. + endif diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile index dd0492ebbed7..aae4477a92a9 100644 --- a/drivers/input/joystick/Makefile +++ b/drivers/input/joystick/Makefile @@ -35,4 +35,5 @@ obj-$(CONFIG_JOYSTICK_WARRIOR) += warrior.o obj-$(CONFIG_JOYSTICK_XPAD) += xpad.o obj-$(CONFIG_JOYSTICK_ZHENHUA) += zhenhua.o obj-$(CONFIG_JOYSTICK_WALKERA0701) += walkera0701.o +obj-$(CONFIG_JOYSTICK_FSIA6B) += fsia6b.o diff --git a/drivers/input/joystick/fsia6b.c b/drivers/input/joystick/fsia6b.c new file mode 100644 index 000000000000..587c2260a56f --- /dev/null +++ b/drivers/input/joystick/fsia6b.c @@ -0,0 +1,255 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * + * FS-iA6B iBus RC receiver kernel driver + * Copyright (C) 2018 - 2019 Markus Koch + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program. + * + */ + +/* + * This driver will provide all 14 channels of the FlySky FS-ia6B RC receiver + * as analog values. + * + * Additionally, the channels can be converted to discrete switch values. + * By default, it is configured for the offical FS-i6 remote control. + * If you use a different hardware configuration, you can configure it + * using the `switch_config` parameter. + * + */ + +#include +#include +#include +#include +#include +#include + +#define DRIVER_DESC "FS-iA6B iBus RC receiver" + +MODULE_AUTHOR("Markus Koch "); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +#define IBUS_SERVO_COUNT 14 + +static char *switch_config = "00000022320000"; +module_param(switch_config, charp, 0444); +MODULE_PARM_DESC(switch_config, + "Amount of switch positions per channel (14 characters, 0-3)"); + +static int fsia6b_axes[IBUS_SERVO_COUNT] = { + ABS_X, ABS_Y, + ABS_Z, ABS_RX, + ABS_RY, ABS_RZ, + ABS_HAT0X, ABS_HAT0Y, + ABS_HAT1X, ABS_HAT1Y, + ABS_HAT2X, ABS_HAT2Y, + ABS_HAT3X, ABS_HAT3Y +}; + +enum ibus_state {SYNC, COLLECT, PROCESS}; + +struct ibus_packet { + enum ibus_state state; + + int offset; + uint16_t ibuf; + uint16_t channel[IBUS_SERVO_COUNT]; +}; + +struct fsia6b { + struct input_dev *dev; + struct ibus_packet packet; + + char phys[32]; +}; + +static irqreturn_t fsia6b_serio_irq(struct serio *serio, + unsigned char data, unsigned int flags) +{ + struct fsia6b *fsia6b = serio_get_drvdata(serio); + int i; + int sw_state; + int sw_id = BTN_0; + + fsia6b->packet.ibuf = (data << 8) | ((fsia6b->packet.ibuf >> 8) & 0xFF); + + switch (fsia6b->packet.state) { + case SYNC: + if (fsia6b->packet.ibuf == 0x4020) + fsia6b->packet.state = COLLECT; + break; + + case COLLECT: + fsia6b->packet.state = PROCESS; + break; + + case PROCESS: + fsia6b->packet.channel[fsia6b->packet.offset] = + fsia6b->packet.ibuf; + fsia6b->packet.offset++; + + if (fsia6b->packet.offset == IBUS_SERVO_COUNT) { + fsia6b->packet.offset = 0; + fsia6b->packet.state = SYNC; + for (i = 0; i < IBUS_SERVO_COUNT; ++i) { + input_report_abs(fsia6b->dev, fsia6b_axes[i], + fsia6b->packet.channel[i]); + + sw_state = 0; + if (fsia6b->packet.channel[i] > 1900) + sw_state = 1; + else if (fsia6b->packet.channel[i] < 1100) + sw_state = 2; + + switch (switch_config[i]) { + case '3': + input_report_key(fsia6b->dev, + sw_id++, + sw_state == 0); + /* fall-through */ + case '2': + input_report_key(fsia6b->dev, + sw_id++, + sw_state == 1); + /* fall-through */ + case '1': + input_report_key(fsia6b->dev, + sw_id++, + sw_state == 2); + } + } + input_sync(fsia6b->dev); + } else { + fsia6b->packet.state = COLLECT; + } + break; + } + + return IRQ_HANDLED; +} + +static int fsia6b_serio_connect(struct serio *serio, struct serio_driver *drv) +{ + struct fsia6b *fsia6b; + struct input_dev *input_dev; + int err; + int i, j; + int sw_id = BTN_0; + + fsia6b = kzalloc(sizeof(struct fsia6b), GFP_KERNEL); + if (!fsia6b) + return -ENOMEM; + + fsia6b->packet.ibuf = 0; + fsia6b->packet.offset = 0; + fsia6b->packet.state = SYNC; + + serio_set_drvdata(serio, fsia6b); + + err = serio_open(serio, drv); + if (err) + goto fail1; + + + input_dev = input_allocate_device(); + err = -ENODEV; + if (!input_dev) + goto fail2; + fsia6b->dev = input_dev; + + snprintf(fsia6b->phys, sizeof(fsia6b->phys), "%s/input0", serio->phys); + + input_dev->name = DRIVER_DESC; + input_dev->phys = fsia6b->phys; + input_dev->id.bustype = BUS_RS232; + input_dev->id.vendor = SERIO_FSIA6B; + input_dev->id.product = serio->id.id; + input_dev->id.version = 0x0100; + input_dev->dev.parent = &serio->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + + for (i = 0; i < IBUS_SERVO_COUNT; ++i) { + input_set_abs_params(input_dev, fsia6b_axes[i], + 1000, 2000, 2, 2); + } + + // Register switch configuration + for (i = 0; i < IBUS_SERVO_COUNT; ++i) { + if (((switch_config[i] == '\0') && (i != IBUS_SERVO_COUNT)) || + (switch_config[i] < '0') || + (switch_config[i] > '3')) { + dev_err(&fsia6b->dev->dev, + "Invalid switch configuration supplied for fsia6b.\n"); + err = -EINVAL; + goto fail3; + } + + for (j = '1'; j <= switch_config[i]; ++j) { + input_dev->keybit[BIT_WORD(BTN_0)] |= + BIT_MASK(sw_id++); + } + + } + + err = input_register_device(fsia6b->dev); + if (err) + goto fail3; + + return 0; + +fail3: input_free_device(input_dev); +fail2: serio_close(serio); +fail1: serio_set_drvdata(serio, NULL); + kfree(fsia6b); + return err; +} + +static void fsia6b_serio_disconnect(struct serio *serio) +{ + struct fsia6b *fsia6b = serio_get_drvdata(serio); + + serio_close(serio); + serio_set_drvdata(serio, NULL); + input_unregister_device(fsia6b->dev); + kfree(fsia6b); +} + +static const struct serio_device_id fsia6b_serio_ids[] = { +{ + .type = SERIO_RS232, + .proto = SERIO_FSIA6B, + .id = SERIO_ANY, + .extra = SERIO_ANY, +}, +{ 0 } +}; + +MODULE_DEVICE_TABLE(serio, fsia6b_serio_ids); + +struct serio_driver fsia6b_serio_drv = { + .driver = { + .name = "fsia6b" + }, + .description = DRIVER_DESC, + .id_table = fsia6b_serio_ids, + .interrupt = fsia6b_serio_irq, + .connect = fsia6b_serio_connect, + .disconnect = fsia6b_serio_disconnect +}; + +module_serio_driver(fsia6b_serio_drv) diff --git a/include/uapi/linux/serio.h b/include/uapi/linux/serio.h index a0cac1d8670d..50e991952c97 100644 --- a/include/uapi/linux/serio.h +++ b/include/uapi/linux/serio.h @@ -82,5 +82,6 @@ #define SERIO_EGALAX 0x3f #define SERIO_PULSE8_CEC 0x40 #define SERIO_RAINSHADOW_CEC 0x41 +#define SERIO_FSIA6B 0x42 #endif /* _UAPI_SERIO_H */