Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 971 insertions, 0 deletions

diff --git a/drivers/media/rc/ati_remote.c b/drivers/media/rc/ati_remote.c
new file mode 100644
index 000000000..fff4dd48e
--- /dev/null
+++ b/drivers/media/rc/ati_remote.c
@@ -0,0 +1,971 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  USB ATI Remote support
+ *
+ *                Copyright (c) 2011, 2012 Anssi Hannula <anssi.hannula@iki.fi>
+ *  Version 2.2.0 Copyright (c) 2004 Torrey Hoffman <thoffman@arnor.net>
+ *  Version 2.1.1 Copyright (c) 2002 Vladimir Dergachev
+ *
+ *  This 2.2.0 version is a rewrite / cleanup of the 2.1.1 driver, including
+ *  porting to the 2.6 kernel interfaces, along with other modification
+ *  to better match the style of the existing usb/input drivers.  However, the
+ *  protocol and hardware handling is essentially unchanged from 2.1.1.
+ *
+ *  The 2.1.1 driver was derived from the usbati_remote and usbkbd drivers by
+ *  Vojtech Pavlik.
+ *
+ *  Changes:
+ *
+ *  Feb 2004: Torrey Hoffman <thoffman@arnor.net>
+ *            Version 2.2.0
+ *  Jun 2004: Torrey Hoffman <thoffman@arnor.net>
+ *            Version 2.2.1
+ *            Added key repeat support contributed by:
+ *                Vincent Vanackere <vanackere@lif.univ-mrs.fr>
+ *            Added support for the "Lola" remote contributed by:
+ *                Seth Cohn <sethcohn@yahoo.com>
+ *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ * Hardware & software notes
+ *
+ * These remote controls are distributed by ATI as part of their
+ * "All-In-Wonder" video card packages.  The receiver self-identifies as a
+ * "USB Receiver" with manufacturer "X10 Wireless Technology Inc".
+ *
+ * The "Lola" remote is available from X10.  See:
+ *    http://www.x10.com/products/lola_sg1.htm
+ * The Lola is similar to the ATI remote but has no mouse support, and slightly
+ * different keys.
+ *
+ * It is possible to use multiple receivers and remotes on multiple computers
+ * simultaneously by configuring them to use specific channels.
+ *
+ * The RF protocol used by the remote supports 16 distinct channels, 1 to 16.
+ * Actually, it may even support more, at least in some revisions of the
+ * hardware.
+ *
+ * Each remote can be configured to transmit on one channel as follows:
+ *   - Press and hold the "hand icon" button.
+ *   - When the red LED starts to blink, let go of the "hand icon" button.
+ *   - When it stops blinking, input the channel code as two digits, from 01
+ *     to 16, and press the hand icon again.
+ *
+ * The timing can be a little tricky.  Try loading the module with debug=1
+ * to have the kernel print out messages about the remote control number
+ * and mask.  Note: debugging prints remote numbers as zero-based hexadecimal.
+ *
+ * The driver has a "channel_mask" parameter. This bitmask specifies which
+ * channels will be ignored by the module.  To mask out channels, just add
+ * all the 2^channel_number values together.
+ *
+ * For instance, set channel_mask = 2^4 = 16 (binary 10000) to make ati_remote
+ * ignore signals coming from remote controls transmitting on channel 4, but
+ * accept all other channels.
+ *
+ * Or, set channel_mask = 65533, (0xFFFD), and all channels except 1 will be
+ * ignored.
+ *
+ * The default is 0 (respond to all channels). Bit 0 and bits 17-32 of this
+ * parameter are unused.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/usb/input.h>
+#include <linux/wait.h>
+#include <linux/jiffies.h>
+#include <media/rc-core.h>
+
+/*
+ * Module and Version Information, Module Parameters
+ */
+
+#define ATI_REMOTE_VENDOR_ID		0x0bc7
+#define LOLA_REMOTE_PRODUCT_ID		0x0002
+#define LOLA2_REMOTE_PRODUCT_ID		0x0003
+#define ATI_REMOTE_PRODUCT_ID		0x0004
+#define NVIDIA_REMOTE_PRODUCT_ID	0x0005
+#define MEDION_REMOTE_PRODUCT_ID	0x0006
+#define FIREFLY_REMOTE_PRODUCT_ID	0x0008
+
+#define DRIVER_VERSION		"2.2.1"
+#define DRIVER_AUTHOR           "Torrey Hoffman <thoffman@arnor.net>"
+#define DRIVER_DESC             "ATI/X10 RF USB Remote Control"
+
+#define NAME_BUFSIZE      80    /* size of product name, path buffers */
+#define DATA_BUFSIZE      63    /* size of URB data buffers */
+
+/*
+ * Duplicate event filtering time.
+ * Sequential, identical KIND_FILTERED inputs with less than
+ * FILTER_TIME milliseconds between them are considered as repeat
+ * events. The hardware generates 5 events for the first keypress
+ * and we have to take this into account for an accurate repeat
+ * behaviour.
+ */
+#define FILTER_TIME	60 /* msec */
+#define REPEAT_DELAY	500 /* msec */
+
+static unsigned long channel_mask;
+module_param(channel_mask, ulong, 0644);
+MODULE_PARM_DESC(channel_mask, "Bitmask of remote control channels to ignore");
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Enable extra debug messages and information");
+
+static int repeat_filter = FILTER_TIME;
+module_param(repeat_filter, int, 0644);
+MODULE_PARM_DESC(repeat_filter, "Repeat filter time, default = 60 msec");
+
+static int repeat_delay = REPEAT_DELAY;
+module_param(repeat_delay, int, 0644);
+MODULE_PARM_DESC(repeat_delay, "Delay before sending repeats, default = 500 msec");
+
+static bool mouse = true;
+module_param(mouse, bool, 0444);
+MODULE_PARM_DESC(mouse, "Enable mouse device, default = yes");
+
+#define dbginfo(dev, format, arg...) \
+	do { if (debug) dev_info(dev , format , ## arg); } while (0)
+
+struct ati_receiver_type {
+	/* either default_keymap or get_default_keymap should be set */
+	const char *default_keymap;
+	const char *(*get_default_keymap)(struct usb_interface *interface);
+};
+
+static const char *get_medion_keymap(struct usb_interface *interface)
+{
+	struct usb_device *udev = interface_to_usbdev(interface);
+
+	/*
+	 * There are many different Medion remotes shipped with a receiver
+	 * with the same usb id, but the receivers have subtle differences
+	 * in the USB descriptors allowing us to detect them.
+	 */
+
+	if (udev->manufacturer && udev->product) {
+		if (udev->actconfig->desc.bmAttributes & USB_CONFIG_ATT_WAKEUP) {
+
+			if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
+			    && !strcmp(udev->product, "USB Receiver"))
+				return RC_MAP_MEDION_X10_DIGITAINER;
+
+			if (!strcmp(udev->manufacturer, "X10 WTI")
+			    && !strcmp(udev->product, "RF receiver"))
+				return RC_MAP_MEDION_X10_OR2X;
+		} else {
+
+			 if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
+			    && !strcmp(udev->product, "USB Receiver"))
+				return RC_MAP_MEDION_X10;
+		}
+	}
+
+	dev_info(&interface->dev,
+		 "Unknown Medion X10 receiver, using default ati_remote Medion keymap\n");
+
+	return RC_MAP_MEDION_X10;
+}
+
+static const struct ati_receiver_type type_ati		= {
+	.default_keymap = RC_MAP_ATI_X10
+};
+static const struct ati_receiver_type type_medion	= {
+	.get_default_keymap = get_medion_keymap
+};
+static const struct ati_receiver_type type_firefly	= {
+	.default_keymap = RC_MAP_SNAPSTREAM_FIREFLY
+};
+
+static const struct usb_device_id ati_remote_table[] = {
+	{
+		USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA_REMOTE_PRODUCT_ID),
+		.driver_info = (unsigned long)&type_ati
+	},
+	{
+		USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA2_REMOTE_PRODUCT_ID),
+		.driver_info = (unsigned long)&type_ati
+	},
+	{
+		USB_DEVICE(ATI_REMOTE_VENDOR_ID, ATI_REMOTE_PRODUCT_ID),
+		.driver_info = (unsigned long)&type_ati
+	},
+	{
+		USB_DEVICE(ATI_REMOTE_VENDOR_ID, NVIDIA_REMOTE_PRODUCT_ID),
+		.driver_info = (unsigned long)&type_ati
+	},
+	{
+		USB_DEVICE(ATI_REMOTE_VENDOR_ID, MEDION_REMOTE_PRODUCT_ID),
+		.driver_info = (unsigned long)&type_medion
+	},
+	{
+		USB_DEVICE(ATI_REMOTE_VENDOR_ID, FIREFLY_REMOTE_PRODUCT_ID),
+		.driver_info = (unsigned long)&type_firefly
+	},
+	{}	/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, ati_remote_table);
+
+/* Get hi and low bytes of a 16-bits int */
+#define HI(a)	((unsigned char)((a) >> 8))
+#define LO(a)	((unsigned char)((a) & 0xff))
+
+#define SEND_FLAG_IN_PROGRESS	1
+#define SEND_FLAG_COMPLETE	2
+
+/* Device initialization strings */
+static char init1[] = { 0x01, 0x00, 0x20, 0x14 };
+static char init2[] = { 0x01, 0x00, 0x20, 0x14, 0x20, 0x20, 0x20 };
+
+struct ati_remote {
+	struct input_dev *idev;
+	struct rc_dev *rdev;
+	struct usb_device *udev;
+	struct usb_interface *interface;
+
+	struct urb *irq_urb;
+	struct urb *out_urb;
+	struct usb_endpoint_descriptor *endpoint_in;
+	struct usb_endpoint_descriptor *endpoint_out;
+	unsigned char *inbuf;
+	unsigned char *outbuf;
+	dma_addr_t inbuf_dma;
+	dma_addr_t outbuf_dma;
+
+	unsigned char old_data;     /* Detect duplicate events */
+	unsigned long old_jiffies;
+	unsigned long acc_jiffies;  /* handle acceleration */
+	unsigned long first_jiffies;
+
+	unsigned int repeat_count;
+
+	char rc_name[NAME_BUFSIZE];
+	char rc_phys[NAME_BUFSIZE];
+	char mouse_name[NAME_BUFSIZE];
+	char mouse_phys[NAME_BUFSIZE];
+
+	wait_queue_head_t wait;
+	int send_flags;
+
+	int users; /* 0-2, users are rc and input */
+	struct mutex open_mutex;
+};
+
+/* "Kinds" of messages sent from the hardware to the driver. */
+#define KIND_END        0
+#define KIND_LITERAL    1   /* Simply pass to input system as EV_KEY */
+#define KIND_FILTERED   2   /* Add artificial key-up events, drop keyrepeats */
+#define KIND_ACCEL      3   /* Translate to EV_REL mouse-move events */
+
+/* Translation table from hardware messages to input events. */
+static const struct {
+	unsigned char kind;
+	unsigned char data;	/* Raw key code from remote */
+	unsigned short code;	/* Input layer translation */
+}  ati_remote_tbl[] = {
+	/* Directional control pad axes.  Code is xxyy */
+	{KIND_ACCEL,    0x70, 0xff00},	/* left */
+	{KIND_ACCEL,    0x71, 0x0100},	/* right */
+	{KIND_ACCEL,    0x72, 0x00ff},	/* up */
+	{KIND_ACCEL,    0x73, 0x0001},	/* down */
+
+	/* Directional control pad diagonals */
+	{KIND_ACCEL,    0x74, 0xffff},	/* left up */
+	{KIND_ACCEL,    0x75, 0x01ff},	/* right up */
+	{KIND_ACCEL,    0x77, 0xff01},	/* left down */
+	{KIND_ACCEL,    0x76, 0x0101},	/* right down */
+
+	/* "Mouse button" buttons.  The code below uses the fact that the
+	 * lsbit of the raw code is a down/up indicator. */
+	{KIND_LITERAL,  0x78, BTN_LEFT}, /* left btn down */
+	{KIND_LITERAL,  0x79, BTN_LEFT}, /* left btn up */
+	{KIND_LITERAL,  0x7c, BTN_RIGHT},/* right btn down */
+	{KIND_LITERAL,  0x7d, BTN_RIGHT},/* right btn up */
+
+	/* Artificial "double-click" events are generated by the hardware.
+	 * They are mapped to the "side" and "extra" mouse buttons here. */
+	{KIND_FILTERED, 0x7a, BTN_SIDE}, /* left dblclick */
+	{KIND_FILTERED, 0x7e, BTN_EXTRA},/* right dblclick */
+
+	/* Non-mouse events are handled by rc-core */
+	{KIND_END, 0x00, 0}
+};
+
+/*
+ * ati_remote_dump_input
+ */
+static void ati_remote_dump(struct device *dev, unsigned char *data,
+			    unsigned int len)
+{
+	if (len == 1) {
+		if (data[0] != (unsigned char)0xff && data[0] != 0x00)
+			dev_warn(dev, "Weird byte 0x%02x\n", data[0]);
+	} else if (len == 4)
+		dev_warn(dev, "Weird key %*ph\n", 4, data);
+	else
+		dev_warn(dev, "Weird data, len=%d %*ph ...\n", len, 6, data);
+}
+
+/*
+ * ati_remote_open
+ */
+static int ati_remote_open(struct ati_remote *ati_remote)
+{
+	int err = 0;
+
+	mutex_lock(&ati_remote->open_mutex);
+
+	if (ati_remote->users++ != 0)
+		goto out; /* one was already active */
+
+	/* On first open, submit the read urb which was set up previously. */
+	ati_remote->irq_urb->dev = ati_remote->udev;
+	if (usb_submit_urb(ati_remote->irq_urb, GFP_KERNEL)) {
+		dev_err(&ati_remote->interface->dev,
+			"%s: usb_submit_urb failed!\n", __func__);
+		err = -EIO;
+	}
+
+out:	mutex_unlock(&ati_remote->open_mutex);
+	return err;
+}
+
+/*
+ * ati_remote_close
+ */
+static void ati_remote_close(struct ati_remote *ati_remote)
+{
+	mutex_lock(&ati_remote->open_mutex);
+	if (--ati_remote->users == 0)
+		usb_kill_urb(ati_remote->irq_urb);
+	mutex_unlock(&ati_remote->open_mutex);
+}
+
+static int ati_remote_input_open(struct input_dev *inputdev)
+{
+	struct ati_remote *ati_remote = input_get_drvdata(inputdev);
+	return ati_remote_open(ati_remote);
+}
+
+static void ati_remote_input_close(struct input_dev *inputdev)
+{
+	struct ati_remote *ati_remote = input_get_drvdata(inputdev);
+	ati_remote_close(ati_remote);
+}
+
+static int ati_remote_rc_open(struct rc_dev *rdev)
+{
+	struct ati_remote *ati_remote = rdev->priv;
+	return ati_remote_open(ati_remote);
+}
+
+static void ati_remote_rc_close(struct rc_dev *rdev)
+{
+	struct ati_remote *ati_remote = rdev->priv;
+	ati_remote_close(ati_remote);
+}
+
+/*
+ * ati_remote_irq_out
+ */
+static void ati_remote_irq_out(struct urb *urb)
+{
+	struct ati_remote *ati_remote = urb->context;
+
+	if (urb->status) {
+		dev_dbg(&ati_remote->interface->dev, "%s: status %d\n",
+			__func__, urb->status);
+		return;
+	}
+
+	ati_remote->send_flags |= SEND_FLAG_COMPLETE;
+	wmb();
+	wake_up(&ati_remote->wait);
+}
+
+/*
+ * ati_remote_sendpacket
+ *
+ * Used to send device initialization strings
+ */
+static int ati_remote_sendpacket(struct ati_remote *ati_remote, u16 cmd,
+	unsigned char *data)
+{
+	int retval = 0;
+
+	/* Set up out_urb */
+	memcpy(ati_remote->out_urb->transfer_buffer + 1, data, LO(cmd));
+	((char *) ati_remote->out_urb->transfer_buffer)[0] = HI(cmd);
+
+	ati_remote->out_urb->transfer_buffer_length = LO(cmd) + 1;
+	ati_remote->out_urb->dev = ati_remote->udev;
+	ati_remote->send_flags = SEND_FLAG_IN_PROGRESS;
+
+	retval = usb_submit_urb(ati_remote->out_urb, GFP_ATOMIC);
+	if (retval) {
+		dev_dbg(&ati_remote->interface->dev,
+			 "sendpacket: usb_submit_urb failed: %d\n", retval);
+		return retval;
+	}
+
+	wait_event_timeout(ati_remote->wait,
+		((ati_remote->out_urb->status != -EINPROGRESS) ||
+			(ati_remote->send_flags & SEND_FLAG_COMPLETE)),
+		HZ);
+	usb_kill_urb(ati_remote->out_urb);
+
+	return retval;
+}
+
+struct accel_times {
+	const char	value;
+	unsigned int	msecs;
+};
+
+static const struct accel_times accel[] = {
+	{  1,  125 },
+	{  2,  250 },
+	{  4,  500 },
+	{  6, 1000 },
+	{  9, 1500 },
+	{ 13, 2000 },
+	{ 20,    0 },
+};
+
+/*
+ * ati_remote_compute_accel
+ *
+ * Implements acceleration curve for directional control pad
+ * If elapsed time since last event is > 1/4 second, user "stopped",
+ * so reset acceleration. Otherwise, user is probably holding the control
+ * pad down, so we increase acceleration, ramping up over two seconds to
+ * a maximum speed.
+ */
+static int ati_remote_compute_accel(struct ati_remote *ati_remote)
+{
+	unsigned long now = jiffies, reset_time;
+	int i;
+
+	reset_time = msecs_to_jiffies(250);
+
+	if (time_after(now, ati_remote->old_jiffies + reset_time)) {
+		ati_remote->acc_jiffies = now;
+		return 1;
+	}
+	for (i = 0; i < ARRAY_SIZE(accel) - 1; i++) {
+		unsigned long timeout = msecs_to_jiffies(accel[i].msecs);
+
+		if (time_before(now, ati_remote->acc_jiffies + timeout))
+			return accel[i].value;
+	}
+	return accel[i].value;
+}
+
+/*
+ * ati_remote_report_input
+ */
+static void ati_remote_input_report(struct urb *urb)
+{
+	struct ati_remote *ati_remote = urb->context;
+	unsigned char *data= ati_remote->inbuf;
+	struct input_dev *dev = ati_remote->idev;
+	int index = -1;
+	int remote_num;
+	unsigned char scancode;
+	u32 wheel_keycode = KEY_RESERVED;
+	int i;
+
+	/*
+	 * data[0] = 0x14
+	 * data[1] = data[2] + data[3] + 0xd5 (a checksum byte)
+	 * data[2] = the key code (with toggle bit in MSB with some models)
+	 * data[3] = channel << 4 (the low 4 bits must be zero)
+	 */
+
+	/* Deal with strange looking inputs */
+	if ( urb->actual_length != 4 || data[0] != 0x14 ||
+	     data[1] != (unsigned char)(data[2] + data[3] + 0xD5) ||
+	     (data[3] & 0x0f) != 0x00) {
+		ati_remote_dump(&urb->dev->dev, data, urb->actual_length);
+		return;
+	}
+
+	if (data[1] != ((data[2] + data[3] + 0xd5) & 0xff)) {
+		dbginfo(&ati_remote->interface->dev,
+			"wrong checksum in input: %*ph\n", 4, data);
+		return;
+	}
+
+	/* Mask unwanted remote channels.  */
+	/* note: remote_num is 0-based, channel 1 on remote == 0 here */
+	remote_num = (data[3] >> 4) & 0x0f;
+	if (channel_mask & (1 << (remote_num + 1))) {
+		dbginfo(&ati_remote->interface->dev,
+			"Masked input from channel 0x%02x: data %02x, mask= 0x%02lx\n",
+			remote_num, data[2], channel_mask);
+		return;
+	}
+
+	/*
+	 * MSB is a toggle code, though only used by some devices
+	 * (e.g. SnapStream Firefly)
+	 */
+	scancode = data[2] & 0x7f;
+
+	dbginfo(&ati_remote->interface->dev,
+		"channel 0x%02x; key data %02x, scancode %02x\n",
+		remote_num, data[2], scancode);
+
+	if (scancode >= 0x70) {
+		/*
+		 * This is either a mouse or scrollwheel event, depending on
+		 * the remote/keymap.
+		 * Get the keycode assigned to scancode 0x78/0x70. If it is
+		 * set, assume this is a scrollwheel up/down event.
+		 */
+		wheel_keycode = rc_g_keycode_from_table(ati_remote->rdev,
+							scancode & 0x78);
+
+		if (wheel_keycode == KEY_RESERVED) {
+			/* scrollwheel was not mapped, assume mouse */
+
+			/* Look up event code index in the mouse translation
+			 * table.
+			 */
+			for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++) {
+				if (scancode == ati_remote_tbl[i].data) {
+					index = i;
+					break;
+				}
+			}
+		}
+	}
+
+	if (index >= 0 && ati_remote_tbl[index].kind == KIND_LITERAL) {
+		/*
+		 * The lsbit of the raw key code is a down/up flag.
+		 * Invert it to match the input layer's conventions.
+		 */
+		input_event(dev, EV_KEY, ati_remote_tbl[index].code,
+			!(data[2] & 1));
+
+		ati_remote->old_jiffies = jiffies;
+
+	} else if (index < 0 || ati_remote_tbl[index].kind == KIND_FILTERED) {
+		unsigned long now = jiffies;
+
+		/* Filter duplicate events which happen "too close" together. */
+		if (ati_remote->old_data == data[2] &&
+		    time_before(now, ati_remote->old_jiffies +
+				     msecs_to_jiffies(repeat_filter))) {
+			ati_remote->repeat_count++;
+		} else {
+			ati_remote->repeat_count = 0;
+			ati_remote->first_jiffies = now;
+		}
+
+		ati_remote->old_jiffies = now;
+
+		/* Ensure we skip at least the 4 first duplicate events
+		 * (generated by a single keypress), and continue skipping
+		 * until repeat_delay msecs have passed.
+		 */
+		if (ati_remote->repeat_count > 0 &&
+		    (ati_remote->repeat_count < 5 ||
+		     time_before(now, ati_remote->first_jiffies +
+				      msecs_to_jiffies(repeat_delay))))
+			return;
+
+		if (index >= 0) {
+			input_event(dev, EV_KEY, ati_remote_tbl[index].code, 1);
+			input_event(dev, EV_KEY, ati_remote_tbl[index].code, 0);
+		} else {
+			/* Not a mouse event, hand it to rc-core. */
+			int count = 1;
+
+			if (wheel_keycode != KEY_RESERVED) {
+				/*
+				 * This is a scrollwheel event, send the
+				 * scroll up (0x78) / down (0x70) scancode
+				 * repeatedly as many times as indicated by
+				 * rest of the scancode.
+				 */
+				count = (scancode & 0x07) + 1;
+				scancode &= 0x78;
+			}
+
+			while (count--) {
+				/*
+				* We don't use the rc-core repeat handling yet as
+				* it would cause ghost repeats which would be a
+				* regression for this driver.
+				*/
+				rc_keydown_notimeout(ati_remote->rdev,
+						     RC_PROTO_OTHER,
+						     scancode, data[2]);
+				rc_keyup(ati_remote->rdev);
+			}
+			goto nosync;
+		}
+
+	} else if (ati_remote_tbl[index].kind == KIND_ACCEL) {
+		signed char dx = ati_remote_tbl[index].code >> 8;
+		signed char dy = ati_remote_tbl[index].code & 255;
+
+		/*
+		 * Other event kinds are from the directional control pad, and
+		 * have an acceleration factor applied to them.  Without this
+		 * acceleration, the control pad is mostly unusable.
+		 */
+		int acc = ati_remote_compute_accel(ati_remote);
+		if (dx)
+			input_report_rel(dev, REL_X, dx * acc);
+		if (dy)
+			input_report_rel(dev, REL_Y, dy * acc);
+		ati_remote->old_jiffies = jiffies;
+
+	} else {
+		dev_dbg(&ati_remote->interface->dev, "ati_remote kind=%d\n",
+			ati_remote_tbl[index].kind);
+		return;
+	}
+	input_sync(dev);
+nosync:
+	ati_remote->old_data = data[2];
+}
+
+/*
+ * ati_remote_irq_in
+ */
+static void ati_remote_irq_in(struct urb *urb)
+{
+	struct ati_remote *ati_remote = urb->context;
+	int retval;
+
+	switch (urb->status) {
+	case 0:			/* success */
+		ati_remote_input_report(urb);
+		break;
+	case -ECONNRESET:	/* unlink */
+	case -ENOENT:
+	case -ESHUTDOWN:
+		dev_dbg(&ati_remote->interface->dev,
+			"%s: urb error status, unlink?\n",
+			__func__);
+		return;
+	default:		/* error */
+		dev_dbg(&ati_remote->interface->dev,
+			"%s: Nonzero urb status %d\n",
+			__func__, urb->status);
+	}
+
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval)
+		dev_err(&ati_remote->interface->dev,
+			"%s: usb_submit_urb()=%d\n",
+			__func__, retval);
+}
+
+/*
+ * ati_remote_alloc_buffers
+ */
+static int ati_remote_alloc_buffers(struct usb_device *udev,
+				    struct ati_remote *ati_remote)
+{
+	ati_remote->inbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
+					       &ati_remote->inbuf_dma);
+	if (!ati_remote->inbuf)
+		return -1;
+
+	ati_remote->outbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
+						&ati_remote->outbuf_dma);
+	if (!ati_remote->outbuf)
+		return -1;
+
+	ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!ati_remote->irq_urb)
+		return -1;
+
+	ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!ati_remote->out_urb)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * ati_remote_free_buffers
+ */
+static void ati_remote_free_buffers(struct ati_remote *ati_remote)
+{
+	usb_free_urb(ati_remote->irq_urb);
+	usb_free_urb(ati_remote->out_urb);
+
+	usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
+		ati_remote->inbuf, ati_remote->inbuf_dma);
+
+	usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
+		ati_remote->outbuf, ati_remote->outbuf_dma);
+}
+
+static void ati_remote_input_init(struct ati_remote *ati_remote)
+{
+	struct input_dev *idev = ati_remote->idev;
+	int i;
+
+	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
+	idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
+		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
+	idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
+	for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++)
+		if (ati_remote_tbl[i].kind == KIND_LITERAL ||
+		    ati_remote_tbl[i].kind == KIND_FILTERED)
+			__set_bit(ati_remote_tbl[i].code, idev->keybit);
+
+	input_set_drvdata(idev, ati_remote);
+
+	idev->open = ati_remote_input_open;
+	idev->close = ati_remote_input_close;
+
+	idev->name = ati_remote->mouse_name;
+	idev->phys = ati_remote->mouse_phys;
+
+	usb_to_input_id(ati_remote->udev, &idev->id);
+	idev->dev.parent = &ati_remote->interface->dev;
+}
+
+static void ati_remote_rc_init(struct ati_remote *ati_remote)
+{
+	struct rc_dev *rdev = ati_remote->rdev;
+
+	rdev->priv = ati_remote;
+	rdev->allowed_protocols = RC_PROTO_BIT_OTHER;
+	rdev->driver_name = "ati_remote";
+
+	rdev->open = ati_remote_rc_open;
+	rdev->close = ati_remote_rc_close;
+
+	rdev->device_name = ati_remote->rc_name;
+	rdev->input_phys = ati_remote->rc_phys;
+
+	usb_to_input_id(ati_remote->udev, &rdev->input_id);
+	rdev->dev.parent = &ati_remote->interface->dev;
+}
+
+static int ati_remote_initialize(struct ati_remote *ati_remote)
+{
+	struct usb_device *udev = ati_remote->udev;
+	int pipe, maxp;
+
+	init_waitqueue_head(&ati_remote->wait);
+
+	/* Set up irq_urb */
+	pipe = usb_rcvintpipe(udev, ati_remote->endpoint_in->bEndpointAddress);
+	maxp = usb_maxpacket(udev, pipe);
+	maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
+
+	usb_fill_int_urb(ati_remote->irq_urb, udev, pipe, ati_remote->inbuf,
+			 maxp, ati_remote_irq_in, ati_remote,
+			 ati_remote->endpoint_in->bInterval);
+	ati_remote->irq_urb->transfer_dma = ati_remote->inbuf_dma;
+	ati_remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	/* Set up out_urb */
+	pipe = usb_sndintpipe(udev, ati_remote->endpoint_out->bEndpointAddress);
+	maxp = usb_maxpacket(udev, pipe);
+	maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
+
+	usb_fill_int_urb(ati_remote->out_urb, udev, pipe, ati_remote->outbuf,
+			 maxp, ati_remote_irq_out, ati_remote,
+			 ati_remote->endpoint_out->bInterval);
+	ati_remote->out_urb->transfer_dma = ati_remote->outbuf_dma;
+	ati_remote->out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	/* send initialization strings */
+	if ((ati_remote_sendpacket(ati_remote, 0x8004, init1)) ||
+	    (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
+		dev_err(&ati_remote->interface->dev,
+			 "Initializing ati_remote hardware failed.\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+/*
+ * ati_remote_probe
+ */
+static int ati_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, *endpoint_out;
+	struct ati_receiver_type *type = (struct ati_receiver_type *)id->driver_info;
+	struct ati_remote *ati_remote;
+	struct input_dev *input_dev;
+	struct device *device = &interface->dev;
+	struct rc_dev *rc_dev;
+	int err = -ENOMEM;
+
+	if (iface_host->desc.bNumEndpoints != 2) {
+		dev_err(device, "%s: Unexpected desc.bNumEndpoints\n", __func__);
+		return -ENODEV;
+	}
+
+	endpoint_in = &iface_host->endpoint[0].desc;
+	endpoint_out = &iface_host->endpoint[1].desc;
+
+	if (!usb_endpoint_is_int_in(endpoint_in)) {
+		dev_err(device, "%s: Unexpected endpoint_in\n", __func__);
+		return -ENODEV;
+	}
+	if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
+		dev_err(device, "%s: endpoint_in message size==0?\n", __func__);
+		return -ENODEV;
+	}
+	if (!usb_endpoint_is_int_out(endpoint_out)) {
+		dev_err(device, "%s: Unexpected endpoint_out\n", __func__);
+		return -ENODEV;
+	}
+
+	ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
+	rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
+	if (!ati_remote || !rc_dev)
+		goto exit_free_dev_rdev;
+
+	/* Allocate URB buffers, URBs */
+	if (ati_remote_alloc_buffers(udev, ati_remote))
+		goto exit_free_buffers;
+
+	ati_remote->endpoint_in = endpoint_in;
+	ati_remote->endpoint_out = endpoint_out;
+	ati_remote->udev = udev;
+	ati_remote->rdev = rc_dev;
+	ati_remote->interface = interface;
+
+	usb_make_path(udev, ati_remote->rc_phys, sizeof(ati_remote->rc_phys));
+	strscpy(ati_remote->mouse_phys, ati_remote->rc_phys,
+		sizeof(ati_remote->mouse_phys));
+
+	strlcat(ati_remote->rc_phys, "/input0", sizeof(ati_remote->rc_phys));
+	strlcat(ati_remote->mouse_phys, "/input1", sizeof(ati_remote->mouse_phys));
+
+	snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name), "%s%s%s",
+		udev->manufacturer ?: "",
+		udev->manufacturer && udev->product ? " " : "",
+		udev->product ?: "");
+
+	if (!strlen(ati_remote->rc_name))
+		snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
+			DRIVER_DESC "(%04x,%04x)",
+			le16_to_cpu(ati_remote->udev->descriptor.idVendor),
+			le16_to_cpu(ati_remote->udev->descriptor.idProduct));
+
+	snprintf(ati_remote->mouse_name, sizeof(ati_remote->mouse_name),
+		 "%s mouse", ati_remote->rc_name);
+
+	rc_dev->map_name = RC_MAP_ATI_X10; /* default map */
+
+	/* set default keymap according to receiver model */
+	if (type) {
+		if (type->default_keymap)
+			rc_dev->map_name = type->default_keymap;
+		else if (type->get_default_keymap)
+			rc_dev->map_name = type->get_default_keymap(interface);
+	}
+
+	ati_remote_rc_init(ati_remote);
+	mutex_init(&ati_remote->open_mutex);
+
+	/* Device Hardware Initialization - fills in ati_remote->idev from udev. */
+	err = ati_remote_initialize(ati_remote);
+	if (err)
+		goto exit_kill_urbs;
+
+	/* Set up and register rc device */
+	err = rc_register_device(ati_remote->rdev);
+	if (err)
+		goto exit_kill_urbs;
+
+	/* Set up and register mouse input device */
+	if (mouse) {
+		input_dev = input_allocate_device();
+		if (!input_dev) {
+			err = -ENOMEM;
+			goto exit_unregister_device;
+		}
+
+		ati_remote->idev = input_dev;
+		ati_remote_input_init(ati_remote);
+		err = input_register_device(input_dev);
+
+		if (err)
+			goto exit_free_input_device;
+	}
+
+	usb_set_intfdata(interface, ati_remote);
+	return 0;
+
+ exit_free_input_device:
+	input_free_device(input_dev);
+ exit_unregister_device:
+	rc_unregister_device(rc_dev);
+	rc_dev = NULL;
+ exit_kill_urbs:
+	usb_kill_urb(ati_remote->irq_urb);
+	usb_kill_urb(ati_remote->out_urb);
+ exit_free_buffers:
+	ati_remote_free_buffers(ati_remote);
+ exit_free_dev_rdev:
+	 rc_free_device(rc_dev);
+	kfree(ati_remote);
+	return err;
+}
+
+/*
+ * ati_remote_disconnect
+ */
+static void ati_remote_disconnect(struct usb_interface *interface)
+{
+	struct ati_remote *ati_remote;
+
+	ati_remote = usb_get_intfdata(interface);
+	usb_set_intfdata(interface, NULL);
+	if (!ati_remote) {
+		dev_warn(&interface->dev, "%s - null device?\n", __func__);
+		return;
+	}
+
+	usb_kill_urb(ati_remote->irq_urb);
+	usb_kill_urb(ati_remote->out_urb);
+	if (ati_remote->idev)
+		input_unregister_device(ati_remote->idev);
+	rc_unregister_device(ati_remote->rdev);
+	ati_remote_free_buffers(ati_remote);
+	kfree(ati_remote);
+}
+
+/* usb specific object to register with the usb subsystem */
+static struct usb_driver ati_remote_driver = {
+	.name         = "ati_remote",
+	.probe        = ati_remote_probe,
+	.disconnect   = ati_remote_disconnect,
+	.id_table     = ati_remote_table,
+};
+
+module_usb_driver(ati_remote_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");