304 lines
6.9 KiB
C
304 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Driver for Phoenix RC Flight Controller Adapter
|
|
*
|
|
* Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@gmail.com>
|
|
*
|
|
*/
|
|
|
|
#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@gmail.com>");
|
|
MODULE_DESCRIPTION("PhoenixRC Flight Controller Adapter");
|
|
MODULE_LICENSE("GPL v2");
|