From patchwork Sat Jan 13 20:15:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcus Folkesson X-Patchwork-Id: 10162377 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3A09C602A7 for ; Sat, 13 Jan 2018 20:16:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2952228AAE for ; Sat, 13 Jan 2018 20:16:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1C56928ABE; Sat, 13 Jan 2018 20:16:07 +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=-6.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, T_DKIM_INVALID 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 1B7F828AAE for ; Sat, 13 Jan 2018 20:16:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752543AbeAMUPs (ORCPT ); Sat, 13 Jan 2018 15:15:48 -0500 Received: from mail-lf0-f68.google.com ([209.85.215.68]:39897 "EHLO mail-lf0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751568AbeAMUPq (ORCPT ); Sat, 13 Jan 2018 15:15:46 -0500 Received: by mail-lf0-f68.google.com with SMTP id m8so9333920lfc.6; Sat, 13 Jan 2018 12:15:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=CI5Nu5/Lk19QfRevlvnIau8RzhDSDal5YTNjSAXrIUs=; b=Mo6fKG+WERFdG+isVUkVDTji70X6p933PPcSl7Za5ymbX0EcJwfIzMg3nUUp1lPHAa 1qBy+T2PZhaRKw9MCBAVfioCnOdmr0ooSPU2lYfTcSCOPQmKFE/f7Fw+meZUXN4eEibG MbQsxWNqQWNEcCmZm32EDhDz8ZAmDwLi0kOvVUQbo+mhyP0hpXYee05olT9VK//QVYiO KffKc7vhBXRZSLUd6N756jPhPsjj1XRW1WQylBgJCaZ416SdmklcuG3PHozE3E3CIHzo 9Awn3jJssM6SJ08I+7GG2NW6SPg3W7Vts3w5irkqLfjhZs+KbhUzIq8Oa2Nxo7pFTK3U 3sOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=CI5Nu5/Lk19QfRevlvnIau8RzhDSDal5YTNjSAXrIUs=; b=IC1KCZ2pnBvCnoVqhsQeBrjhAN2PFjkbdw98QU837cSGqolprhB50xKdoaGWyGH060 +vyvfV7Ek3OZ4LONS6/OFsUELAvO44RdKginOPc/DZih26Ey8Ts6eDBhKKkErsAQMk5W hFgDOhoyBo4zetlOYkyVHZi1Wi9YvqcrDbvhSD+UEGrUwxGcKGtdlD9UTEVwWcP9q/lu NHCWIfMHVarE35kgXxha5VuEDP8yY30ntAQo+65/sf06fTkzU/+eXDK5ZMt4lf4XjJdb /XWPVP1ztGQzkUzgNq45c4Oz7ZCjUBTgISERXLAKJfKMl4BzsiyGHCo0768YR24TJeIn vH3A== X-Gm-Message-State: AKwxytdYk2Ao0DWbASDIsq0UMnCzvQlbN1gfI4MJWl+cLqNTqV3Bac8Z WWm8iLeXKE3OdrfvxCFW2+c= X-Google-Smtp-Source: ACJfBostKNkIcKRnybzeXYjmYNVpEOB09eUfcR13P+SKOMEPRo/+fi2/Cwc/qt0QsbvrdXrO1HDLRA== X-Received: by 10.46.36.17 with SMTP id k17mr1443246ljk.5.1515874544501; Sat, 13 Jan 2018 12:15:44 -0800 (PST) Received: from localhost.localdomain ([46.194.230.105]) by smtp.gmail.com with ESMTPSA id e26sm4665051ljb.93.2018.01.13.12.15.41 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 13 Jan 2018 12:15:42 -0800 (PST) From: Marcus Folkesson To: Dmitry Torokhov , Jonathan Corbet , Marcus Folkesson , Tomohiro Yoshidomi , David Herrmann , Philippe Ombredanne , Kate Stewart , Greg Kroah-Hartman Cc: linux-input@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3] input: pxrc: new driver for PhoenixRC Flight Controller Adapter Date: Sat, 13 Jan 2018 21:15:32 +0100 Message-Id: <20180113201532.26016-1-marcus.folkesson@gmail.com> X-Mailer: git-send-email 2.15.1 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 driver let you plug in your RC controller to the adapter and use it as input device in various RC simulators. Signed-off-by: Marcus Folkesson --- v3: - Use RUDDER and MISC instead of TILT_X and TILT_Y - Drop kref and anchor - Rework URB handling - Add PM support v2: - Change module license to GPLv2 to match SPDX tag Documentation/input/devices/pxrc.rst | 57 +++++++ drivers/input/joystick/Kconfig | 9 + drivers/input/joystick/Makefile | 1 + drivers/input/joystick/pxrc.c | 320 +++++++++++++++++++++++++++++++++++ 4 files changed, 387 insertions(+) create mode 100644 Documentation/input/devices/pxrc.rst create mode 100644 drivers/input/joystick/pxrc.c diff --git a/Documentation/input/devices/pxrc.rst b/Documentation/input/devices/pxrc.rst new file mode 100644 index 000000000000..ca11f646bae8 --- /dev/null +++ b/Documentation/input/devices/pxrc.rst @@ -0,0 +1,57 @@ +======================================================= +pxrc - PhoenixRC Flight Controller Adapter +======================================================= + +:Author: Marcus Folkesson + +This driver let you use your own RC controller plugged into the +adapter that comes with PhoenixRC [1]_ or other compatible adapters. + +The adapter supports 7 analog channels and 1 digital input switch. + +Notes +===== + +Many RC controllers is able to configure which stick goes to which channel. +This is also configurable in most simulators, so a matching is not necessary. + +The driver is generating the following input event for analog channels: + ++---------+----------------+ +| Channel | Event | ++=========+================+ +| 1 | ABS_X | ++---------+----------------+ +| 2 | ABS_Y | ++---------+----------------+ +| 3 | ABS_RX | ++---------+----------------+ +| 4 | ABS_RY | ++---------+----------------+ +| 5 | ABS_RUDDER | ++---------+----------------+ +| 6 | ABS_THROTTLE | ++---------+----------------+ +| 7 | ABS_MISC | ++---------+----------------+ + +The digital input switch is generated as an `BTN_A` event. + +Manual Testing +============== + +To test this driver's functionality you may use `input-event` which is part of +the `input layer utilities` suite [2]_. + +For example:: + + > modprobe pxrc + > input-events + +To print all input events from input `devnr`. + +References +========== + +.. [1] http://www.phoenix-sim.com/ +.. [2] https://www.kraxel.org/cgit/input/ diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig index f3c2f6ea8b44..18ab6dafff41 100644 --- a/drivers/input/joystick/Kconfig +++ b/drivers/input/joystick/Kconfig @@ -351,4 +351,13 @@ config JOYSTICK_PSXPAD_SPI_FF To drive rumble motor a dedicated power supply is required. +config JOYSTICK_PXRC + tristate "PhoenixRC Flight Controller Adapter" + depends on USB_ARCH_HAS_HCD + select USB + help + Say Y here if you want to use the PhoenixRC Flight Controller Adapter. + + To compile this driver as a module, choose M here: the + module will be called pxrc. endif diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile index 67651efda2e1..dd0492ebbed7 100644 --- a/drivers/input/joystick/Makefile +++ b/drivers/input/joystick/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_JOYSTICK_JOYDUMP) += joydump.o obj-$(CONFIG_JOYSTICK_MAGELLAN) += magellan.o obj-$(CONFIG_JOYSTICK_MAPLE) += maplecontrol.o obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) += psxpad-spi.o +obj-$(CONFIG_JOYSTICK_PXRC) += pxrc.o obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o obj-$(CONFIG_JOYSTICK_SPACEBALL) += spaceball.o obj-$(CONFIG_JOYSTICK_SPACEORB) += spaceorb.o diff --git a/drivers/input/joystick/pxrc.c b/drivers/input/joystick/pxrc.c new file mode 100644 index 000000000000..98d9b8184c46 --- /dev/null +++ b/drivers/input/joystick/pxrc.c @@ -0,0 +1,320 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Phoenix RC Flight Controller Adapter + * + * Copyright (C) 2018 Marcus Folkesson + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PXRC_VENDOR_ID (0x1781) +#define PXRC_PRODUCT_ID (0x0898) + +static const struct usb_device_id pxrc_table[] = { + { USB_DEVICE(PXRC_VENDOR_ID, PXRC_PRODUCT_ID) }, + { } +}; +MODULE_DEVICE_TABLE(usb, pxrc_table); + +struct pxrc { + struct input_dev *input; + struct usb_device *udev; + struct usb_interface *intf; + struct urb *urb; + __u8 epaddr; + char phys[64]; + unsigned char *data; + size_t bsize; +}; + +static void pxrc_usb_irq(struct urb *urb) +{ + struct pxrc *pxrc = urb->context; + int error; + + switch (urb->status) { + case 0: + /* success */ + break; + case -ETIME: + /* this urb is timing out */ + dev_dbg(&pxrc->intf->dev, + "%s - urb timed out - was the device unplugged?\n", + __func__); + return; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + case -EPIPE: + /* this urb is terminated, clean up */ + dev_dbg(&pxrc->intf->dev, "%s - urb shutting down with status: %d\n", + __func__, urb->status); + return; + default: + dev_dbg(&pxrc->intf->dev, "%s - nonzero urb status received: %d\n", + __func__, urb->status); + goto exit; + } + + if (urb->actual_length == 8) { + input_report_abs(pxrc->input, ABS_X, pxrc->data[0]); + input_report_abs(pxrc->input, ABS_Y, pxrc->data[2]); + input_report_abs(pxrc->input, ABS_RX, pxrc->data[3]); + input_report_abs(pxrc->input, ABS_RY, pxrc->data[4]); + input_report_abs(pxrc->input, ABS_RUDDER, pxrc->data[5]); + input_report_abs(pxrc->input, ABS_THROTTLE, pxrc->data[6]); + input_report_abs(pxrc->input, ABS_MISC, pxrc->data[7]); + + input_report_key(pxrc->input, BTN_A, pxrc->data[1]); + } + +exit: + /* Resubmit to fetch new fresh URBs */ + error = usb_submit_urb(urb, GFP_ATOMIC); + if (error && error != -EPERM) + dev_err(&pxrc->intf->dev, + "%s - usb_submit_urb failed with result: %d", + __func__, error); +} + +static int pxrc_open(struct input_dev *input) +{ + struct pxrc *pxrc = input_get_drvdata(input); + int retval; + + retval = usb_autopm_get_interface(pxrc->intf); + if (retval) { + dev_err(&pxrc->intf->dev, + "%s - usb_autopm_get_interface failed, error: %d\n", + __func__, retval); + return retval; + } + + retval = usb_submit_urb(pxrc->urb, GFP_KERNEL); + if (retval) { + dev_err(&pxrc->intf->dev, + "%s - usb_submit_urb failed, error: %d\n", + __func__, retval); + retval = -EIO; + goto out; + } + + pxrc->intf->needs_remote_wakeup = 1; + +out: + usb_autopm_put_interface(pxrc->intf); + return retval; +} + +static void pxrc_close(struct input_dev *input) +{ + struct pxrc *pxrc = input_get_drvdata(input); + int autopm_error; + + autopm_error = usb_autopm_get_interface(pxrc->intf); + + usb_kill_urb(pxrc->urb); + pxrc->intf->needs_remote_wakeup = 0; + + if (!autopm_error) + usb_autopm_put_interface(pxrc->intf); +} + +static int pxrc_usb_init(struct pxrc *pxrc) +{ + struct usb_endpoint_descriptor *epirq; + unsigned int pipe; + int retval; + + /* Set up the endpoint information */ + /* This device only has an interrupt endpoint */ + retval = usb_find_common_endpoints(pxrc->intf->cur_altsetting, + NULL, NULL, &epirq, NULL); + if (retval) { + dev_err(&pxrc->intf->dev, + "Could not find endpoint\n"); + goto error; + } + + pxrc->bsize = usb_endpoint_maxp(epirq); + pxrc->epaddr = epirq->bEndpointAddress; + pxrc->data = devm_kmalloc(&pxrc->intf->dev, pxrc->bsize, GFP_KERNEL); + if (!pxrc->data) { + retval = -ENOMEM; + goto error; + } + + usb_set_intfdata(pxrc->intf, pxrc); + usb_make_path(pxrc->udev, pxrc->phys, sizeof(pxrc->phys)); + strlcat(pxrc->phys, "/input0", sizeof(pxrc->phys)); + + pxrc->urb = usb_alloc_urb(0, GFP_KERNEL); + if (!pxrc->urb) { + retval = -ENOMEM; + goto error; + } + + pipe = usb_rcvintpipe(pxrc->udev, pxrc->epaddr), + usb_fill_int_urb(pxrc->urb, pxrc->udev, pipe, pxrc->data, pxrc->bsize, + pxrc_usb_irq, pxrc, 1); + +error: + return retval; + + +} + + +static int pxrc_input_init(struct pxrc *pxrc) +{ + pxrc->input = devm_input_allocate_device(&pxrc->intf->dev); + if (pxrc->input == NULL) { + dev_err(&pxrc->intf->dev, "couldn't allocate input device\n"); + return -ENOMEM; + } + + pxrc->input->name = "PXRC Flight Controller Adapter"; + pxrc->input->phys = pxrc->phys; + usb_to_input_id(pxrc->udev, &pxrc->input->id); + + pxrc->input->open = pxrc_open; + pxrc->input->close = pxrc_close; + + input_set_capability(pxrc->input, EV_KEY, BTN_A); + input_set_abs_params(pxrc->input, ABS_X, 0, 255, 0, 0); + input_set_abs_params(pxrc->input, ABS_Y, 0, 255, 0, 0); + input_set_abs_params(pxrc->input, ABS_RX, 0, 255, 0, 0); + input_set_abs_params(pxrc->input, ABS_RY, 0, 255, 0, 0); + input_set_abs_params(pxrc->input, ABS_RUDDER, 0, 255, 0, 0); + input_set_abs_params(pxrc->input, ABS_THROTTLE, 0, 255, 0, 0); + input_set_abs_params(pxrc->input, ABS_MISC, 0, 255, 0, 0); + + input_set_drvdata(pxrc->input, pxrc); + + return input_register_device(pxrc->input); +} + +static int pxrc_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct pxrc *pxrc; + int retval; + + pxrc = devm_kzalloc(&intf->dev, sizeof(*pxrc), GFP_KERNEL); + + if (!pxrc) + return -ENOMEM; + + pxrc->udev = usb_get_dev(interface_to_usbdev(intf)); + pxrc->intf = intf; + + retval = pxrc_usb_init(pxrc); + if (retval) + goto error; + + retval = pxrc_input_init(pxrc); + if (retval) + goto err_free_urb; + + return 0; + +err_free_urb: + usb_free_urb(pxrc->urb); + +error: + return retval; +} + +static void pxrc_disconnect(struct usb_interface *intf) +{ + struct pxrc *pxrc = usb_get_intfdata(intf); + + usb_free_urb(pxrc->urb); + usb_set_intfdata(intf, NULL); +} + +static int pxrc_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct pxrc *pxrc = usb_get_intfdata(intf); + struct input_dev *input_dev = pxrc->input; + + mutex_lock(&input_dev->mutex); + usb_kill_urb(pxrc->urb); + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static int pxrc_resume(struct usb_interface *intf) +{ + struct pxrc *pxrc = usb_get_intfdata(intf); + struct input_dev *input_dev = pxrc->input; + int retval = 0; + + mutex_lock(&input_dev->mutex); + + if (input_dev->users && usb_submit_urb(pxrc->urb, GFP_NOIO) < 0) + retval = -EIO; + + mutex_unlock(&input_dev->mutex); + + return retval; +} + +static int pxrc_pre_reset(struct usb_interface *intf) +{ + struct pxrc *pxrc = usb_get_intfdata(intf); + struct input_dev *input_dev = pxrc->input; + + mutex_lock(&input_dev->mutex); + usb_kill_urb(pxrc->urb); + + return 0; +} + +static int pxrc_post_reset(struct usb_interface *intf) +{ + struct pxrc *pxrc = usb_get_intfdata(intf); + struct input_dev *input_dev = pxrc->input; + int retval = 0; + + if (input_dev->users && usb_submit_urb(pxrc->urb, GFP_NOIO) < 0) + retval = -EIO; + + mutex_unlock(&input_dev->mutex); + + return retval; +} + +static int pxrc_reset_resume(struct usb_interface *intf) +{ + return pxrc_resume(intf); +} + +static struct usb_driver pxrc_driver = { + .name = "pxrc", + .probe = pxrc_probe, + .disconnect = pxrc_disconnect, + .id_table = pxrc_table, + .suspend = pxrc_suspend, + .resume = pxrc_resume, + .pre_reset = pxrc_pre_reset, + .post_reset = pxrc_post_reset, + .reset_resume = pxrc_reset_resume, + .supports_autosuspend = 1, +}; + +module_usb_driver(pxrc_driver); + +MODULE_AUTHOR("Marcus Folkesson "); +MODULE_DESCRIPTION("PhoenixRC Flight Controller Adapter"); +MODULE_LICENSE("GPL v2");