linux/drivers/media/rc/xbox_remote.c
Sean Young 528222d853 media: rc: harmonize infrared durations to microseconds
rc-core kapi uses nanoseconds for infrared durations for receiving, and
microseconds for sending. The uapi already uses microseconds for both,
so this patch does not change the uapi.

Infrared durations do not need nanosecond resolution. IR protocols do not
have durations shorter than about 100 microseconds. Some IR hardware offers
250 microseconds resolution, which is sufficient for most protocols.
Better hardware has 50 microsecond resolution and is enough for every
protocol I am aware off.

Unify on microseconds everywhere. This simplifies the code since less
conversion between microseconds and nanoseconds needs to be done.

This affects:
 - rx_resolution member of struct rc_dev
 - timeout member of struct rc_dev
 - duration member in struct ir_raw_event

Cc: "Bruno Prémont" <bonbons@linux-vserver.org>
Cc: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Patrick Lerda <patrick9876@free.fr>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Sean Wang <sean.wang@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: "David Härdeman" <david@hardeman.nu>
Cc: Benjamin Valentin <benpicco@googlemail.com>
Cc: Antti Palosaari <crope@iki.fi>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-09-03 16:18:55 +02:00

309 lines
7.9 KiB
C

// 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_XBOX_DVD,
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_XBOX_DVD;
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;
rdev->timeout = MS_TO_US(10);
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");