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2cb5cadf17
It cannot fail. Make it void. Signed-off-by: Oliver Neukum <oneukum@suse.com> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
305 lines
7.8 KiB
C
305 lines
7.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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// Driver for Xbox DVD Movie Playback Kit
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// Copyright (c) 2018 by Benjamin Valentin <benpicco@googlemail.com>
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/*
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* Xbox DVD Movie Playback Kit USB IR dongle support
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*
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* The driver was derived from the ati_remote driver 2.2.1
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* and used information from lirc_xbox.c
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*
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* Copyright (c) 2011, 2012 Anssi Hannula <anssi.hannula@iki.fi>
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* Copyright (c) 2004 Torrey Hoffman <thoffman@arnor.net>
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* Copyright (c) 2002 Vladimir Dergachev
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* Copyright (c) 2003-2004 Paul Miller <pmiller9@users.sourceforge.net>
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/usb/input.h>
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#include <media/rc-core.h>
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/*
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* Module and Version Information
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*/
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#define DRIVER_VERSION "1.0.0"
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#define DRIVER_AUTHOR "Benjamin Valentin <benpicco@googlemail.com>"
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#define DRIVER_DESC "Xbox DVD USB Remote Control"
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#define NAME_BUFSIZE 80 /* size of product name, path buffers */
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#define DATA_BUFSIZE 8 /* size of URB data buffers */
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/*
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* USB vendor ids for XBOX DVD Dongles
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*/
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#define VENDOR_GAMESTER 0x040b
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#define VENDOR_MICROSOFT 0x045e
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static const struct usb_device_id xbox_remote_table[] = {
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/* Gamester Xbox DVD Movie Playback Kit IR */
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{
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USB_DEVICE(VENDOR_GAMESTER, 0x6521),
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},
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/* Microsoft Xbox DVD Movie Playback Kit IR */
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{
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USB_DEVICE(VENDOR_MICROSOFT, 0x0284),
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},
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{} /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, xbox_remote_table);
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struct xbox_remote {
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struct rc_dev *rdev;
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struct usb_device *udev;
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struct usb_interface *interface;
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struct urb *irq_urb;
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unsigned char inbuf[DATA_BUFSIZE] __aligned(sizeof(u16));
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char rc_name[NAME_BUFSIZE];
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char rc_phys[NAME_BUFSIZE];
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};
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static int xbox_remote_rc_open(struct rc_dev *rdev)
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{
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struct xbox_remote *xbox_remote = rdev->priv;
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/* On first open, submit the read urb which was set up previously. */
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xbox_remote->irq_urb->dev = xbox_remote->udev;
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if (usb_submit_urb(xbox_remote->irq_urb, GFP_KERNEL)) {
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dev_err(&xbox_remote->interface->dev,
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"%s: usb_submit_urb failed!\n", __func__);
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return -EIO;
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}
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return 0;
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}
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static void xbox_remote_rc_close(struct rc_dev *rdev)
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{
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struct xbox_remote *xbox_remote = rdev->priv;
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usb_kill_urb(xbox_remote->irq_urb);
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}
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/*
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* xbox_remote_report_input
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*/
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static void xbox_remote_input_report(struct urb *urb)
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{
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struct xbox_remote *xbox_remote = urb->context;
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unsigned char *data = xbox_remote->inbuf;
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/*
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* data[0] = 0x00
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* data[1] = length - always 0x06
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* data[2] = the key code
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* data[3] = high part of key code
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* data[4] = last_press_ms (low)
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* data[5] = last_press_ms (high)
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*/
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/* Deal with strange looking inputs */
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if (urb->actual_length != 6 || urb->actual_length != data[1]) {
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dev_warn(&urb->dev->dev, "Weird data, len=%d: %*ph\n",
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urb->actual_length, urb->actual_length, data);
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return;
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}
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rc_keydown(xbox_remote->rdev, RC_PROTO_XBOX_DVD,
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le16_to_cpup((__le16 *)(data + 2)), 0);
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}
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/*
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* xbox_remote_irq_in
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*/
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static void xbox_remote_irq_in(struct urb *urb)
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{
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struct xbox_remote *xbox_remote = urb->context;
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int retval;
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switch (urb->status) {
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case 0: /* success */
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xbox_remote_input_report(urb);
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break;
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case -ECONNRESET: /* unlink */
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case -ENOENT:
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case -ESHUTDOWN:
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dev_dbg(&xbox_remote->interface->dev,
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"%s: urb error status, unlink?\n",
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__func__);
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return;
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default: /* error */
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dev_dbg(&xbox_remote->interface->dev,
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"%s: Nonzero urb status %d\n",
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__func__, urb->status);
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}
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retval = usb_submit_urb(urb, GFP_ATOMIC);
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if (retval)
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dev_err(&xbox_remote->interface->dev,
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"%s: usb_submit_urb()=%d\n",
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__func__, retval);
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}
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static void xbox_remote_rc_init(struct xbox_remote *xbox_remote)
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{
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struct rc_dev *rdev = xbox_remote->rdev;
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rdev->priv = xbox_remote;
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rdev->allowed_protocols = RC_PROTO_BIT_XBOX_DVD;
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rdev->driver_name = "xbox_remote";
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rdev->open = xbox_remote_rc_open;
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rdev->close = xbox_remote_rc_close;
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rdev->device_name = xbox_remote->rc_name;
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rdev->input_phys = xbox_remote->rc_phys;
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rdev->timeout = MS_TO_US(10);
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usb_to_input_id(xbox_remote->udev, &rdev->input_id);
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rdev->dev.parent = &xbox_remote->interface->dev;
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}
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static void xbox_remote_initialize(struct xbox_remote *xbox_remote,
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struct usb_endpoint_descriptor *endpoint_in)
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{
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struct usb_device *udev = xbox_remote->udev;
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int pipe, maxp;
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/* Set up irq_urb */
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pipe = usb_rcvintpipe(udev, endpoint_in->bEndpointAddress);
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maxp = usb_maxpacket(udev, pipe);
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maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
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usb_fill_int_urb(xbox_remote->irq_urb, udev, pipe, xbox_remote->inbuf,
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maxp, xbox_remote_irq_in, xbox_remote,
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endpoint_in->bInterval);
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}
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/*
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* xbox_remote_probe
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*/
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static int xbox_remote_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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struct usb_device *udev = interface_to_usbdev(interface);
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struct usb_host_interface *iface_host = interface->cur_altsetting;
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struct usb_endpoint_descriptor *endpoint_in;
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struct xbox_remote *xbox_remote;
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struct rc_dev *rc_dev;
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int err = -ENOMEM;
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// why is there also a device with no endpoints?
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if (iface_host->desc.bNumEndpoints == 0)
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return -ENODEV;
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if (iface_host->desc.bNumEndpoints != 1) {
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pr_err("%s: Unexpected desc.bNumEndpoints: %d\n",
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__func__, iface_host->desc.bNumEndpoints);
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return -ENODEV;
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}
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endpoint_in = &iface_host->endpoint[0].desc;
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if (!usb_endpoint_is_int_in(endpoint_in)) {
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pr_err("%s: Unexpected endpoint_in\n", __func__);
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return -ENODEV;
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}
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if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
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pr_err("%s: endpoint_in message size==0?\n", __func__);
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return -ENODEV;
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}
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xbox_remote = kzalloc(sizeof(*xbox_remote), GFP_KERNEL);
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rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
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if (!xbox_remote || !rc_dev)
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goto exit_free_dev_rdev;
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/* Allocate URB buffer */
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xbox_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!xbox_remote->irq_urb)
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goto exit_free_buffers;
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xbox_remote->udev = udev;
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xbox_remote->rdev = rc_dev;
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xbox_remote->interface = interface;
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usb_make_path(udev, xbox_remote->rc_phys, sizeof(xbox_remote->rc_phys));
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strlcat(xbox_remote->rc_phys, "/input0", sizeof(xbox_remote->rc_phys));
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snprintf(xbox_remote->rc_name, sizeof(xbox_remote->rc_name), "%s%s%s",
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udev->manufacturer ?: "",
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udev->manufacturer && udev->product ? " " : "",
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udev->product ?: "");
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if (!strlen(xbox_remote->rc_name))
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snprintf(xbox_remote->rc_name, sizeof(xbox_remote->rc_name),
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DRIVER_DESC "(%04x,%04x)",
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le16_to_cpu(xbox_remote->udev->descriptor.idVendor),
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le16_to_cpu(xbox_remote->udev->descriptor.idProduct));
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rc_dev->map_name = RC_MAP_XBOX_DVD; /* default map */
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xbox_remote_rc_init(xbox_remote);
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/* Device Hardware Initialization */
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xbox_remote_initialize(xbox_remote, endpoint_in);
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/* Set up and register rc device */
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err = rc_register_device(xbox_remote->rdev);
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if (err)
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goto exit_kill_urbs;
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usb_set_intfdata(interface, xbox_remote);
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return 0;
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exit_kill_urbs:
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usb_kill_urb(xbox_remote->irq_urb);
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exit_free_buffers:
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usb_free_urb(xbox_remote->irq_urb);
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exit_free_dev_rdev:
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rc_free_device(rc_dev);
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kfree(xbox_remote);
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return err;
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}
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/*
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* xbox_remote_disconnect
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*/
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static void xbox_remote_disconnect(struct usb_interface *interface)
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{
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struct xbox_remote *xbox_remote;
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xbox_remote = usb_get_intfdata(interface);
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usb_set_intfdata(interface, NULL);
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if (!xbox_remote) {
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dev_warn(&interface->dev, "%s - null device?\n", __func__);
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return;
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}
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usb_kill_urb(xbox_remote->irq_urb);
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rc_unregister_device(xbox_remote->rdev);
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usb_free_urb(xbox_remote->irq_urb);
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kfree(xbox_remote);
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}
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/* usb specific object to register with the usb subsystem */
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static struct usb_driver xbox_remote_driver = {
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.name = "xbox_remote",
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.probe = xbox_remote_probe,
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.disconnect = xbox_remote_disconnect,
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.id_table = xbox_remote_table,
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};
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module_usb_driver(xbox_remote_driver);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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