Input: pxrc - new driver for PhoenixRC Flight Controller Adapter
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 <marcus.folkesson@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Marcus Folkesson
Dmitry Torokhov
Родитель
85f46fbf5e
Коммит
68ef4836cd
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@ -0,0 +1,57 @@
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=======================================================
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pxrc - PhoenixRC Flight Controller Adapter
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=======================================================
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:Author: Marcus Folkesson <marcus.folkesson@gmail.com>
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This driver let you use your own RC controller plugged into the
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adapter that comes with PhoenixRC [1]_ or other compatible adapters.
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The adapter supports 7 analog channels and 1 digital input switch.
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Notes
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=====
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Many RC controllers is able to configure which stick goes to which channel.
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This is also configurable in most simulators, so a matching is not necessary.
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The driver is generating the following input event for analog channels:
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+---------+----------------+
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| Channel | Event |
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+=========+================+
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| 1 | ABS_X |
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+---------+----------------+
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| 2 | ABS_Y |
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+---------+----------------+
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| 3 | ABS_RX |
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+---------+----------------+
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| 4 | ABS_RY |
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+---------+----------------+
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| 5 | ABS_RUDDER |
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+---------+----------------+
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| 6 | ABS_THROTTLE |
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+---------+----------------+
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| 7 | ABS_MISC |
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+---------+----------------+
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The digital input switch is generated as an `BTN_A` event.
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Manual Testing
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==============
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To test this driver's functionality you may use `input-event` which is part of
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the `input layer utilities` suite [2]_.
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For example::
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> modprobe pxrc
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> input-events <devnr>
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To print all input events from input `devnr`.
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References
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==========
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.. [1] http://www.phoenix-sim.com/
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.. [2] https://www.kraxel.org/cgit/input/
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@ -351,4 +351,14 @@ config JOYSTICK_PSXPAD_SPI_FF
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To drive rumble motor a dedicated power supply is required.
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config JOYSTICK_PXRC
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tristate "PhoenixRC Flight Controller Adapter"
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depends on USB_ARCH_HAS_HCD
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select USB
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help
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Say Y here if you want to use the PhoenixRC Flight Controller Adapter.
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To compile this driver as a module, choose M here: the
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module will be called pxrc.
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endif
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@ -23,6 +23,7 @@ obj-$(CONFIG_JOYSTICK_JOYDUMP) += joydump.o
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obj-$(CONFIG_JOYSTICK_MAGELLAN) += magellan.o
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obj-$(CONFIG_JOYSTICK_MAPLE) += maplecontrol.o
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obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) += psxpad-spi.o
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obj-$(CONFIG_JOYSTICK_PXRC) += pxrc.o
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obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o
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obj-$(CONFIG_JOYSTICK_SPACEBALL) += spaceball.o
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obj-$(CONFIG_JOYSTICK_SPACEORB) += spaceorb.o
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@ -0,0 +1,303 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Driver for Phoenix RC Flight Controller Adapter
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*
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* Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@gmail.com>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/input.h>
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#include <linux/mutex.h>
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#include <linux/input.h>
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#define PXRC_VENDOR_ID (0x1781)
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#define PXRC_PRODUCT_ID (0x0898)
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static const struct usb_device_id pxrc_table[] = {
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{ USB_DEVICE(PXRC_VENDOR_ID, PXRC_PRODUCT_ID) },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, pxrc_table);
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struct pxrc {
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struct input_dev *input;
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struct usb_device *udev;
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struct usb_interface *intf;
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struct urb *urb;
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struct mutex pm_mutex;
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bool is_open;
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__u8 epaddr;
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char phys[64];
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unsigned char *data;
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size_t bsize;
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};
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static void pxrc_usb_irq(struct urb *urb)
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{
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struct pxrc *pxrc = urb->context;
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int error;
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switch (urb->status) {
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case 0:
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/* success */
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break;
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case -ETIME:
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/* this urb is timing out */
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dev_dbg(&pxrc->intf->dev,
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"%s - urb timed out - was the device unplugged?\n",
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__func__);
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return;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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case -EPIPE:
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/* this urb is terminated, clean up */
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dev_dbg(&pxrc->intf->dev, "%s - urb shutting down with status: %d\n",
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__func__, urb->status);
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return;
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default:
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dev_dbg(&pxrc->intf->dev, "%s - nonzero urb status received: %d\n",
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__func__, urb->status);
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goto exit;
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}
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if (urb->actual_length == 8) {
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input_report_abs(pxrc->input, ABS_X, pxrc->data[0]);
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input_report_abs(pxrc->input, ABS_Y, pxrc->data[2]);
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input_report_abs(pxrc->input, ABS_RX, pxrc->data[3]);
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input_report_abs(pxrc->input, ABS_RY, pxrc->data[4]);
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input_report_abs(pxrc->input, ABS_RUDDER, pxrc->data[5]);
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input_report_abs(pxrc->input, ABS_THROTTLE, pxrc->data[6]);
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input_report_abs(pxrc->input, ABS_MISC, pxrc->data[7]);
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input_report_key(pxrc->input, BTN_A, pxrc->data[1]);
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}
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exit:
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/* Resubmit to fetch new fresh URBs */
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error = usb_submit_urb(urb, GFP_ATOMIC);
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if (error && error != -EPERM)
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dev_err(&pxrc->intf->dev,
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"%s - usb_submit_urb failed with result: %d",
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__func__, error);
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}
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static int pxrc_open(struct input_dev *input)
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{
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struct pxrc *pxrc = input_get_drvdata(input);
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int retval;
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mutex_lock(&pxrc->pm_mutex);
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retval = usb_submit_urb(pxrc->urb, GFP_KERNEL);
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if (retval) {
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dev_err(&pxrc->intf->dev,
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"%s - usb_submit_urb failed, error: %d\n",
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__func__, retval);
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retval = -EIO;
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goto out;
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}
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pxrc->is_open = true;
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out:
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mutex_unlock(&pxrc->pm_mutex);
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return retval;
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}
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static void pxrc_close(struct input_dev *input)
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{
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struct pxrc *pxrc = input_get_drvdata(input);
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mutex_lock(&pxrc->pm_mutex);
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usb_kill_urb(pxrc->urb);
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pxrc->is_open = false;
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mutex_unlock(&pxrc->pm_mutex);
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}
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static int pxrc_usb_init(struct pxrc *pxrc)
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{
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struct usb_endpoint_descriptor *epirq;
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unsigned int pipe;
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int retval;
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/* Set up the endpoint information */
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/* This device only has an interrupt endpoint */
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retval = usb_find_common_endpoints(pxrc->intf->cur_altsetting,
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NULL, NULL, &epirq, NULL);
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if (retval) {
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dev_err(&pxrc->intf->dev,
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"Could not find endpoint\n");
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goto error;
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}
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pxrc->bsize = usb_endpoint_maxp(epirq);
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pxrc->epaddr = epirq->bEndpointAddress;
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pxrc->data = devm_kmalloc(&pxrc->intf->dev, pxrc->bsize, GFP_KERNEL);
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if (!pxrc->data) {
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retval = -ENOMEM;
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goto error;
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}
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usb_set_intfdata(pxrc->intf, pxrc);
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usb_make_path(pxrc->udev, pxrc->phys, sizeof(pxrc->phys));
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strlcat(pxrc->phys, "/input0", sizeof(pxrc->phys));
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pxrc->urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!pxrc->urb) {
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retval = -ENOMEM;
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goto error;
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}
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pipe = usb_rcvintpipe(pxrc->udev, pxrc->epaddr),
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usb_fill_int_urb(pxrc->urb, pxrc->udev, pipe, pxrc->data, pxrc->bsize,
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pxrc_usb_irq, pxrc, 1);
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error:
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return retval;
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}
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static int pxrc_input_init(struct pxrc *pxrc)
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{
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pxrc->input = devm_input_allocate_device(&pxrc->intf->dev);
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if (pxrc->input == NULL) {
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dev_err(&pxrc->intf->dev, "couldn't allocate input device\n");
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return -ENOMEM;
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}
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pxrc->input->name = "PXRC Flight Controller Adapter";
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pxrc->input->phys = pxrc->phys;
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usb_to_input_id(pxrc->udev, &pxrc->input->id);
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pxrc->input->open = pxrc_open;
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pxrc->input->close = pxrc_close;
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input_set_capability(pxrc->input, EV_KEY, BTN_A);
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input_set_abs_params(pxrc->input, ABS_X, 0, 255, 0, 0);
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input_set_abs_params(pxrc->input, ABS_Y, 0, 255, 0, 0);
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input_set_abs_params(pxrc->input, ABS_RX, 0, 255, 0, 0);
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input_set_abs_params(pxrc->input, ABS_RY, 0, 255, 0, 0);
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input_set_abs_params(pxrc->input, ABS_RUDDER, 0, 255, 0, 0);
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input_set_abs_params(pxrc->input, ABS_THROTTLE, 0, 255, 0, 0);
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input_set_abs_params(pxrc->input, ABS_MISC, 0, 255, 0, 0);
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input_set_drvdata(pxrc->input, pxrc);
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return input_register_device(pxrc->input);
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}
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static int pxrc_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct pxrc *pxrc;
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int retval;
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pxrc = devm_kzalloc(&intf->dev, sizeof(*pxrc), GFP_KERNEL);
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if (!pxrc)
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return -ENOMEM;
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mutex_init(&pxrc->pm_mutex);
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pxrc->udev = usb_get_dev(interface_to_usbdev(intf));
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pxrc->intf = intf;
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retval = pxrc_usb_init(pxrc);
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if (retval)
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goto error;
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retval = pxrc_input_init(pxrc);
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if (retval)
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goto err_free_urb;
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return 0;
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err_free_urb:
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usb_free_urb(pxrc->urb);
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error:
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return retval;
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}
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static void pxrc_disconnect(struct usb_interface *intf)
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{
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struct pxrc *pxrc = usb_get_intfdata(intf);
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usb_free_urb(pxrc->urb);
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usb_set_intfdata(intf, NULL);
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}
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static int pxrc_suspend(struct usb_interface *intf, pm_message_t message)
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{
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struct pxrc *pxrc = usb_get_intfdata(intf);
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mutex_lock(&pxrc->pm_mutex);
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if (pxrc->is_open)
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usb_kill_urb(pxrc->urb);
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mutex_unlock(&pxrc->pm_mutex);
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return 0;
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}
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static int pxrc_resume(struct usb_interface *intf)
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{
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struct pxrc *pxrc = usb_get_intfdata(intf);
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int retval = 0;
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mutex_lock(&pxrc->pm_mutex);
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if (pxrc->is_open && usb_submit_urb(pxrc->urb, GFP_KERNEL) < 0)
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retval = -EIO;
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mutex_unlock(&pxrc->pm_mutex);
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return retval;
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}
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static int pxrc_pre_reset(struct usb_interface *intf)
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{
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struct pxrc *pxrc = usb_get_intfdata(intf);
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mutex_lock(&pxrc->pm_mutex);
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usb_kill_urb(pxrc->urb);
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return 0;
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}
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static int pxrc_post_reset(struct usb_interface *intf)
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{
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struct pxrc *pxrc = usb_get_intfdata(intf);
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int retval = 0;
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if (pxrc->is_open && usb_submit_urb(pxrc->urb, GFP_KERNEL) < 0)
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retval = -EIO;
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mutex_unlock(&pxrc->pm_mutex);
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return retval;
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}
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static int pxrc_reset_resume(struct usb_interface *intf)
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{
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return pxrc_resume(intf);
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}
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static struct usb_driver pxrc_driver = {
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.name = "pxrc",
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.probe = pxrc_probe,
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.disconnect = pxrc_disconnect,
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.id_table = pxrc_table,
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.suspend = pxrc_suspend,
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.resume = pxrc_resume,
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.pre_reset = pxrc_pre_reset,
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.post_reset = pxrc_post_reset,
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.reset_resume = pxrc_reset_resume,
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};
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module_usb_driver(pxrc_driver);
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MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
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MODULE_DESCRIPTION("PhoenixRC Flight Controller Adapter");
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MODULE_LICENSE("GPL v2");
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