linux/drivers/media/rc/xbox_remote.c

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// SPDX-License-Identifier: GPL-2.0+
// Driver for Xbox DVD Movie Playback Kit
// Copyright (c) 2018 by Benjamin Valentin <benpicco@googlemail.com>
/*
* Xbox DVD Movie Playback Kit USB IR dongle support
*
* The driver was derived from the ati_remote driver 2.2.1
* and used information from lirc_xbox.c
*
* Copyright (c) 2011, 2012 Anssi Hannula <anssi.hannula@iki.fi>
* Copyright (c) 2004 Torrey Hoffman <thoffman@arnor.net>
* Copyright (c) 2002 Vladimir Dergachev
* Copyright (c) 2003-2004 Paul Miller <pmiller9@users.sourceforge.net>
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb/input.h>
#include <media/rc-core.h>
/*
* Module and Version Information
*/
#define DRIVER_VERSION "1.0.0"
#define DRIVER_AUTHOR "Benjamin Valentin <benpicco@googlemail.com>"
#define DRIVER_DESC "Xbox DVD USB Remote Control"
#define NAME_BUFSIZE 80 /* size of product name, path buffers */
#define DATA_BUFSIZE 8 /* size of URB data buffers */
/*
* USB vendor ids for XBOX DVD Dongles
*/
#define VENDOR_GAMESTER 0x040b
#define VENDOR_MICROSOFT 0x045e
static const struct usb_device_id xbox_remote_table[] = {
/* Gamester Xbox DVD Movie Playback Kit IR */
{
USB_DEVICE(VENDOR_GAMESTER, 0x6521),
},
/* Microsoft Xbox DVD Movie Playback Kit IR */
{
USB_DEVICE(VENDOR_MICROSOFT, 0x0284),
},
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, xbox_remote_table);
struct xbox_remote {
struct rc_dev *rdev;
struct usb_device *udev;
struct usb_interface *interface;
struct urb *irq_urb;
unsigned char inbuf[DATA_BUFSIZE] __aligned(sizeof(u16));
char rc_name[NAME_BUFSIZE];
char rc_phys[NAME_BUFSIZE];
};
static int xbox_remote_rc_open(struct rc_dev *rdev)
{
struct xbox_remote *xbox_remote = rdev->priv;
/* On first open, submit the read urb which was set up previously. */
xbox_remote->irq_urb->dev = xbox_remote->udev;
if (usb_submit_urb(xbox_remote->irq_urb, GFP_KERNEL)) {
dev_err(&xbox_remote->interface->dev,
"%s: usb_submit_urb failed!\n", __func__);
return -EIO;
}
return 0;
}
static void xbox_remote_rc_close(struct rc_dev *rdev)
{
struct xbox_remote *xbox_remote = rdev->priv;
usb_kill_urb(xbox_remote->irq_urb);
}
/*
* xbox_remote_report_input
*/
static void xbox_remote_input_report(struct urb *urb)
{
struct xbox_remote *xbox_remote = urb->context;
unsigned char *data = xbox_remote->inbuf;
/*
* data[0] = 0x00
* data[1] = length - always 0x06
* data[2] = the key code
* data[3] = high part of key code
* data[4] = last_press_ms (low)
* data[5] = last_press_ms (high)
*/
/* Deal with strange looking inputs */
if (urb->actual_length != 6 || urb->actual_length != data[1]) {
dev_warn(&urb->dev->dev, "Weird data, len=%d: %*ph\n",
urb->actual_length, urb->actual_length, data);
return;
}
rc_keydown(xbox_remote->rdev, RC_PROTO_UNKNOWN,
le16_to_cpup((__le16 *)(data + 2)), 0);
}
/*
* xbox_remote_irq_in
*/
static void xbox_remote_irq_in(struct urb *urb)
{
struct xbox_remote *xbox_remote = urb->context;
int retval;
switch (urb->status) {
case 0: /* success */
xbox_remote_input_report(urb);
break;
case -ECONNRESET: /* unlink */
case -ENOENT:
case -ESHUTDOWN:
dev_dbg(&xbox_remote->interface->dev,
"%s: urb error status, unlink?\n",
__func__);
return;
default: /* error */
dev_dbg(&xbox_remote->interface->dev,
"%s: Nonzero urb status %d\n",
__func__, urb->status);
}
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval)
dev_err(&xbox_remote->interface->dev,
"%s: usb_submit_urb()=%d\n",
__func__, retval);
}
static void xbox_remote_rc_init(struct xbox_remote *xbox_remote)
{
struct rc_dev *rdev = xbox_remote->rdev;
rdev->priv = xbox_remote;
rdev->allowed_protocols = RC_PROTO_BIT_UNKNOWN;
rdev->driver_name = "xbox_remote";
rdev->open = xbox_remote_rc_open;
rdev->close = xbox_remote_rc_close;
rdev->device_name = xbox_remote->rc_name;
rdev->input_phys = xbox_remote->rc_phys;
usb_to_input_id(xbox_remote->udev, &rdev->input_id);
rdev->dev.parent = &xbox_remote->interface->dev;
}
static int xbox_remote_initialize(struct xbox_remote *xbox_remote,
struct usb_endpoint_descriptor *endpoint_in)
{
struct usb_device *udev = xbox_remote->udev;
int pipe, maxp;
/* Set up irq_urb */
pipe = usb_rcvintpipe(udev, endpoint_in->bEndpointAddress);
maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
usb_fill_int_urb(xbox_remote->irq_urb, udev, pipe, xbox_remote->inbuf,
maxp, xbox_remote_irq_in, xbox_remote,
endpoint_in->bInterval);
return 0;
}
/*
* xbox_remote_probe
*/
static int xbox_remote_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_host_interface *iface_host = interface->cur_altsetting;
struct usb_endpoint_descriptor *endpoint_in;
struct xbox_remote *xbox_remote;
struct rc_dev *rc_dev;
int err = -ENOMEM;
// why is there also a device with no endpoints?
if (iface_host->desc.bNumEndpoints == 0)
return -ENODEV;
if (iface_host->desc.bNumEndpoints != 1) {
pr_err("%s: Unexpected desc.bNumEndpoints: %d\n",
__func__, iface_host->desc.bNumEndpoints);
return -ENODEV;
}
endpoint_in = &iface_host->endpoint[0].desc;
if (!usb_endpoint_is_int_in(endpoint_in)) {
pr_err("%s: Unexpected endpoint_in\n", __func__);
return -ENODEV;
}
if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
pr_err("%s: endpoint_in message size==0?\n", __func__);
return -ENODEV;
}
xbox_remote = kzalloc(sizeof(*xbox_remote), GFP_KERNEL);
rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
if (!xbox_remote || !rc_dev)
goto exit_free_dev_rdev;
/* Allocate URB buffer */
xbox_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!xbox_remote->irq_urb)
goto exit_free_buffers;
xbox_remote->udev = udev;
xbox_remote->rdev = rc_dev;
xbox_remote->interface = interface;
usb_make_path(udev, xbox_remote->rc_phys, sizeof(xbox_remote->rc_phys));
strlcat(xbox_remote->rc_phys, "/input0", sizeof(xbox_remote->rc_phys));
snprintf(xbox_remote->rc_name, sizeof(xbox_remote->rc_name), "%s%s%s",
udev->manufacturer ?: "",
udev->manufacturer && udev->product ? " " : "",
udev->product ?: "");
if (!strlen(xbox_remote->rc_name))
snprintf(xbox_remote->rc_name, sizeof(xbox_remote->rc_name),
DRIVER_DESC "(%04x,%04x)",
le16_to_cpu(xbox_remote->udev->descriptor.idVendor),
le16_to_cpu(xbox_remote->udev->descriptor.idProduct));
rc_dev->map_name = RC_MAP_XBOX_DVD; /* default map */
xbox_remote_rc_init(xbox_remote);
/* Device Hardware Initialization */
err = xbox_remote_initialize(xbox_remote, endpoint_in);
if (err)
goto exit_kill_urbs;
/* Set up and register rc device */
err = rc_register_device(xbox_remote->rdev);
if (err)
goto exit_kill_urbs;
usb_set_intfdata(interface, xbox_remote);
return 0;
exit_kill_urbs:
usb_kill_urb(xbox_remote->irq_urb);
exit_free_buffers:
usb_free_urb(xbox_remote->irq_urb);
exit_free_dev_rdev:
rc_free_device(rc_dev);
kfree(xbox_remote);
return err;
}
/*
* xbox_remote_disconnect
*/
static void xbox_remote_disconnect(struct usb_interface *interface)
{
struct xbox_remote *xbox_remote;
xbox_remote = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
if (!xbox_remote) {
dev_warn(&interface->dev, "%s - null device?\n", __func__);
return;
}
usb_kill_urb(xbox_remote->irq_urb);
rc_unregister_device(xbox_remote->rdev);
usb_free_urb(xbox_remote->irq_urb);
kfree(xbox_remote);
}
/* usb specific object to register with the usb subsystem */
static struct usb_driver xbox_remote_driver = {
.name = "xbox_remote",
.probe = xbox_remote_probe,
.disconnect = xbox_remote_disconnect,
.id_table = xbox_remote_table,
};
module_usb_driver(xbox_remote_driver);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");