On Sun, Feb 18, 2018 at 05:17:46PM +0100, Marcus Folkesson wrote: > 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@xxxxxxxxx> Applied, thank you. > --- > > v5: > - Drop autosuspend support > - Use pm_mutex instead of input_dev->mutex > - Use pxrc->is_open instead of input_dev->users > v4: > - Add call to usb_mark_last_busy() in irq > - Move code from pxrc_resume() to pxrc_reset_resume() > 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 | 303 +++++++++++++++++++++++++++++++++++ > 4 files changed, 370 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 <marcus.folkesson@xxxxxxxxx> > + > +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 <devnr> > + > +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..332c0cc1b2ab 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 > + depends on 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..07a0dbd3ced2 > --- /dev/null > +++ b/drivers/input/joystick/pxrc.c > @@ -0,0 +1,303 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Driver for Phoenix RC Flight Controller Adapter > + * > + * Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@xxxxxxxxx> > + * > + */ > + > +#include <linux/kernel.h> > +#include <linux/errno.h> > +#include <linux/slab.h> > +#include <linux/module.h> > +#include <linux/uaccess.h> > +#include <linux/usb.h> > +#include <linux/usb/input.h> > +#include <linux/mutex.h> > +#include <linux/input.h> > + > +#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; > + struct mutex pm_mutex; > + bool is_open; > + __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; > + > + mutex_lock(&pxrc->pm_mutex); > + 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->is_open = true; > + > +out: > + mutex_unlock(&pxrc->pm_mutex); > + return retval; > +} > + > +static void pxrc_close(struct input_dev *input) > +{ > + struct pxrc *pxrc = input_get_drvdata(input); > + > + mutex_lock(&pxrc->pm_mutex); > + usb_kill_urb(pxrc->urb); > + pxrc->is_open = false; > + mutex_unlock(&pxrc->pm_mutex); > +} > + > +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; > + > + mutex_init(&pxrc->pm_mutex); > + 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); > + > + mutex_lock(&pxrc->pm_mutex); > + if (pxrc->is_open) > + usb_kill_urb(pxrc->urb); > + mutex_unlock(&pxrc->pm_mutex); > + > + return 0; > +} > + > +static int pxrc_resume(struct usb_interface *intf) > +{ > + struct pxrc *pxrc = usb_get_intfdata(intf); > + int retval = 0; > + > + mutex_lock(&pxrc->pm_mutex); > + if (pxrc->is_open && usb_submit_urb(pxrc->urb, GFP_KERNEL) < 0) > + retval = -EIO; > + > + mutex_unlock(&pxrc->pm_mutex); > + return retval; > +} > + > +static int pxrc_pre_reset(struct usb_interface *intf) > +{ > + struct pxrc *pxrc = usb_get_intfdata(intf); > + > + mutex_lock(&pxrc->pm_mutex); > + usb_kill_urb(pxrc->urb); > + return 0; > +} > + > +static int pxrc_post_reset(struct usb_interface *intf) > +{ > + struct pxrc *pxrc = usb_get_intfdata(intf); > + int retval = 0; > + > + if (pxrc->is_open && usb_submit_urb(pxrc->urb, GFP_KERNEL) < 0) > + retval = -EIO; > + > + mutex_unlock(&pxrc->pm_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, > +}; > + > +module_usb_driver(pxrc_driver); > + > +MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@xxxxxxxxx>"); > +MODULE_DESCRIPTION("PhoenixRC Flight Controller Adapter"); > +MODULE_LICENSE("GPL v2"); > -- > 2.15.1 > -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
