Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 1035 insertions, 0 deletions

diff --git a/drivers/input/misc/ati_remote2.c b/drivers/input/misc/ati_remote2.c
new file mode 100644
index 000000000..946bf75aa
--- /dev/null
+++ b/drivers/input/misc/ati_remote2.c
@@ -0,0 +1,1035 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ati_remote2 - ATI/Philips USB RF remote driver
+ *
+ * Copyright (C) 2005-2008 Ville Syrjala <syrjala@sci.fi>
+ * Copyright (C) 2007-2008 Peter Stokes <linux@dadeos.co.uk>
+ */
+
+#include <linux/usb/input.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+#define DRIVER_DESC    "ATI/Philips USB RF remote driver"
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
+MODULE_LICENSE("GPL");
+
+/*
+ * ATI Remote Wonder II Channel Configuration
+ *
+ * The remote control can be assigned one of sixteen "channels" in order to facilitate
+ * the use of multiple remote controls within range of each other.
+ * A remote's "channel" may be altered by pressing and holding the "PC" button for
+ * approximately 3 seconds, after which the button will slowly flash the count of the
+ * currently configured "channel", using the numeric keypad enter a number between 1 and
+ * 16 and then press the "PC" button again, the button will slowly flash the count of the
+ * newly configured "channel".
+ */
+
+enum {
+	ATI_REMOTE2_MAX_CHANNEL_MASK = 0xFFFF,
+	ATI_REMOTE2_MAX_MODE_MASK = 0x1F,
+};
+
+static int ati_remote2_set_mask(const char *val,
+				const struct kernel_param *kp,
+				unsigned int max)
+{
+	unsigned int mask;
+	int ret;
+
+	if (!val)
+		return -EINVAL;
+
+	ret = kstrtouint(val, 0, &mask);
+	if (ret)
+		return ret;
+
+	if (mask & ~max)
+		return -EINVAL;
+
+	*(unsigned int *)kp->arg = mask;
+
+	return 0;
+}
+
+static int ati_remote2_set_channel_mask(const char *val,
+					const struct kernel_param *kp)
+{
+	pr_debug("%s()\n", __func__);
+
+	return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_CHANNEL_MASK);
+}
+
+static int ati_remote2_get_channel_mask(char *buffer,
+					const struct kernel_param *kp)
+{
+	pr_debug("%s()\n", __func__);
+
+	return sprintf(buffer, "0x%04x\n", *(unsigned int *)kp->arg);
+}
+
+static int ati_remote2_set_mode_mask(const char *val,
+				     const struct kernel_param *kp)
+{
+	pr_debug("%s()\n", __func__);
+
+	return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_MODE_MASK);
+}
+
+static int ati_remote2_get_mode_mask(char *buffer,
+				     const struct kernel_param *kp)
+{
+	pr_debug("%s()\n", __func__);
+
+	return sprintf(buffer, "0x%02x\n", *(unsigned int *)kp->arg);
+}
+
+static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
+#define param_check_channel_mask(name, p) __param_check(name, p, unsigned int)
+static const struct kernel_param_ops param_ops_channel_mask = {
+	.set = ati_remote2_set_channel_mask,
+	.get = ati_remote2_get_channel_mask,
+};
+module_param(channel_mask, channel_mask, 0644);
+MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");
+
+static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
+#define param_check_mode_mask(name, p) __param_check(name, p, unsigned int)
+static const struct kernel_param_ops param_ops_mode_mask = {
+	.set = ati_remote2_set_mode_mask,
+	.get = ati_remote2_get_mode_mask,
+};
+module_param(mode_mask, mode_mask, 0644);
+MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");
+
+static const struct usb_device_id ati_remote2_id_table[] = {
+	{ USB_DEVICE(0x0471, 0x0602) },	/* ATI Remote Wonder II */
+	{ }
+};
+MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);
+
+static DEFINE_MUTEX(ati_remote2_mutex);
+
+enum {
+	ATI_REMOTE2_OPENED = 0x1,
+	ATI_REMOTE2_SUSPENDED = 0x2,
+};
+
+enum {
+	ATI_REMOTE2_AUX1,
+	ATI_REMOTE2_AUX2,
+	ATI_REMOTE2_AUX3,
+	ATI_REMOTE2_AUX4,
+	ATI_REMOTE2_PC,
+	ATI_REMOTE2_MODES,
+};
+
+static const struct {
+	u8  hw_code;
+	u16 keycode;
+} ati_remote2_key_table[] = {
+	{ 0x00, KEY_0 },
+	{ 0x01, KEY_1 },
+	{ 0x02, KEY_2 },
+	{ 0x03, KEY_3 },
+	{ 0x04, KEY_4 },
+	{ 0x05, KEY_5 },
+	{ 0x06, KEY_6 },
+	{ 0x07, KEY_7 },
+	{ 0x08, KEY_8 },
+	{ 0x09, KEY_9 },
+	{ 0x0c, KEY_POWER },
+	{ 0x0d, KEY_MUTE },
+	{ 0x10, KEY_VOLUMEUP },
+	{ 0x11, KEY_VOLUMEDOWN },
+	{ 0x20, KEY_CHANNELUP },
+	{ 0x21, KEY_CHANNELDOWN },
+	{ 0x28, KEY_FORWARD },
+	{ 0x29, KEY_REWIND },
+	{ 0x2c, KEY_PLAY },
+	{ 0x30, KEY_PAUSE },
+	{ 0x31, KEY_STOP },
+	{ 0x37, KEY_RECORD },
+	{ 0x38, KEY_DVD },
+	{ 0x39, KEY_TV },
+	{ 0x3f, KEY_PROG1 }, /* AUX1-AUX4 and PC */
+	{ 0x54, KEY_MENU },
+	{ 0x58, KEY_UP },
+	{ 0x59, KEY_DOWN },
+	{ 0x5a, KEY_LEFT },
+	{ 0x5b, KEY_RIGHT },
+	{ 0x5c, KEY_OK },
+	{ 0x78, KEY_A },
+	{ 0x79, KEY_B },
+	{ 0x7a, KEY_C },
+	{ 0x7b, KEY_D },
+	{ 0x7c, KEY_E },
+	{ 0x7d, KEY_F },
+	{ 0x82, KEY_ENTER },
+	{ 0x8e, KEY_VENDOR },
+	{ 0x96, KEY_COFFEE },
+	{ 0xa9, BTN_LEFT },
+	{ 0xaa, BTN_RIGHT },
+	{ 0xbe, KEY_QUESTION },
+	{ 0xd0, KEY_EDIT },
+	{ 0xd5, KEY_FRONT },
+	{ 0xf9, KEY_INFO },
+};
+
+struct ati_remote2 {
+	struct input_dev *idev;
+	struct usb_device *udev;
+
+	struct usb_interface *intf[2];
+	struct usb_endpoint_descriptor *ep[2];
+	struct urb *urb[2];
+	void *buf[2];
+	dma_addr_t buf_dma[2];
+
+	unsigned long jiffies;
+	int mode;
+
+	char name[64];
+	char phys[64];
+
+	/* Each mode (AUX1-AUX4 and PC) can have an independent keymap. */
+	u16 keycode[ATI_REMOTE2_MODES][ARRAY_SIZE(ati_remote2_key_table)];
+
+	unsigned int flags;
+
+	unsigned int channel_mask;
+	unsigned int mode_mask;
+};
+
+static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
+static void ati_remote2_disconnect(struct usb_interface *interface);
+static int ati_remote2_suspend(struct usb_interface *interface, pm_message_t message);
+static int ati_remote2_resume(struct usb_interface *interface);
+static int ati_remote2_reset_resume(struct usb_interface *interface);
+static int ati_remote2_pre_reset(struct usb_interface *interface);
+static int ati_remote2_post_reset(struct usb_interface *interface);
+
+static struct usb_driver ati_remote2_driver = {
+	.name       = "ati_remote2",
+	.probe      = ati_remote2_probe,
+	.disconnect = ati_remote2_disconnect,
+	.id_table   = ati_remote2_id_table,
+	.suspend    = ati_remote2_suspend,
+	.resume     = ati_remote2_resume,
+	.reset_resume = ati_remote2_reset_resume,
+	.pre_reset  = ati_remote2_pre_reset,
+	.post_reset = ati_remote2_post_reset,
+	.supports_autosuspend = 1,
+};
+
+static int ati_remote2_submit_urbs(struct ati_remote2 *ar2)
+{
+	int r;
+
+	r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
+	if (r) {
+		dev_err(&ar2->intf[0]->dev,
+			"%s(): usb_submit_urb() = %d\n", __func__, r);
+		return r;
+	}
+	r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
+	if (r) {
+		usb_kill_urb(ar2->urb[0]);
+		dev_err(&ar2->intf[1]->dev,
+			"%s(): usb_submit_urb() = %d\n", __func__, r);
+		return r;
+	}
+
+	return 0;
+}
+
+static void ati_remote2_kill_urbs(struct ati_remote2 *ar2)
+{
+	usb_kill_urb(ar2->urb[1]);
+	usb_kill_urb(ar2->urb[0]);
+}
+
+static int ati_remote2_open(struct input_dev *idev)
+{
+	struct ati_remote2 *ar2 = input_get_drvdata(idev);
+	int r;
+
+	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+	r = usb_autopm_get_interface(ar2->intf[0]);
+	if (r) {
+		dev_err(&ar2->intf[0]->dev,
+			"%s(): usb_autopm_get_interface() = %d\n", __func__, r);
+		goto fail1;
+	}
+
+	mutex_lock(&ati_remote2_mutex);
+
+	if (!(ar2->flags & ATI_REMOTE2_SUSPENDED)) {
+		r = ati_remote2_submit_urbs(ar2);
+		if (r)
+			goto fail2;
+	}
+
+	ar2->flags |= ATI_REMOTE2_OPENED;
+
+	mutex_unlock(&ati_remote2_mutex);
+
+	usb_autopm_put_interface(ar2->intf[0]);
+
+	return 0;
+
+ fail2:
+	mutex_unlock(&ati_remote2_mutex);
+	usb_autopm_put_interface(ar2->intf[0]);
+ fail1:
+	return r;
+}
+
+static void ati_remote2_close(struct input_dev *idev)
+{
+	struct ati_remote2 *ar2 = input_get_drvdata(idev);
+
+	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+	mutex_lock(&ati_remote2_mutex);
+
+	if (!(ar2->flags & ATI_REMOTE2_SUSPENDED))
+		ati_remote2_kill_urbs(ar2);
+
+	ar2->flags &= ~ATI_REMOTE2_OPENED;
+
+	mutex_unlock(&ati_remote2_mutex);
+}
+
+static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
+{
+	struct input_dev *idev = ar2->idev;
+	u8 *data = ar2->buf[0];
+	int channel, mode;
+
+	channel = data[0] >> 4;
+
+	if (!((1 << channel) & ar2->channel_mask))
+		return;
+
+	mode = data[0] & 0x0F;
+
+	if (mode > ATI_REMOTE2_PC) {
+		dev_err(&ar2->intf[0]->dev,
+			"Unknown mode byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	if (!((1 << mode) & ar2->mode_mask))
+		return;
+
+	input_event(idev, EV_REL, REL_X, (s8) data[1]);
+	input_event(idev, EV_REL, REL_Y, (s8) data[2]);
+	input_sync(idev);
+}
+
+static int ati_remote2_lookup(unsigned int hw_code)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ati_remote2_key_table); i++)
+		if (ati_remote2_key_table[i].hw_code == hw_code)
+			return i;
+
+	return -1;
+}
+
+static void ati_remote2_input_key(struct ati_remote2 *ar2)
+{
+	struct input_dev *idev = ar2->idev;
+	u8 *data = ar2->buf[1];
+	int channel, mode, hw_code, index;
+
+	channel = data[0] >> 4;
+
+	if (!((1 << channel) & ar2->channel_mask))
+		return;
+
+	mode = data[0] & 0x0F;
+
+	if (mode > ATI_REMOTE2_PC) {
+		dev_err(&ar2->intf[1]->dev,
+			"Unknown mode byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	hw_code = data[2];
+	if (hw_code == 0x3f) {
+		/*
+		 * For some incomprehensible reason the mouse pad generates
+		 * events which look identical to the events from the last
+		 * pressed mode key. Naturally we don't want to generate key
+		 * events for the mouse pad so we filter out any subsequent
+		 * events from the same mode key.
+		 */
+		if (ar2->mode == mode)
+			return;
+
+		if (data[1] == 0)
+			ar2->mode = mode;
+	}
+
+	if (!((1 << mode) & ar2->mode_mask))
+		return;
+
+	index = ati_remote2_lookup(hw_code);
+	if (index < 0) {
+		dev_err(&ar2->intf[1]->dev,
+			"Unknown code byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	switch (data[1]) {
+	case 0:	/* release */
+		break;
+	case 1:	/* press */
+		ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_DELAY]);
+		break;
+	case 2:	/* repeat */
+
+		/* No repeat for mouse buttons. */
+		if (ar2->keycode[mode][index] == BTN_LEFT ||
+		    ar2->keycode[mode][index] == BTN_RIGHT)
+			return;
+
+		if (!time_after_eq(jiffies, ar2->jiffies))
+			return;
+
+		ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_PERIOD]);
+		break;
+	default:
+		dev_err(&ar2->intf[1]->dev,
+			"Unknown state byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	input_event(idev, EV_KEY, ar2->keycode[mode][index], data[1]);
+	input_sync(idev);
+}
+
+static void ati_remote2_complete_mouse(struct urb *urb)
+{
+	struct ati_remote2 *ar2 = urb->context;
+	int r;
+
+	switch (urb->status) {
+	case 0:
+		usb_mark_last_busy(ar2->udev);
+		ati_remote2_input_mouse(ar2);
+		break;
+	case -ENOENT:
+	case -EILSEQ:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		dev_dbg(&ar2->intf[0]->dev,
+			"%s(): urb status = %d\n", __func__, urb->status);
+		return;
+	default:
+		usb_mark_last_busy(ar2->udev);
+		dev_err(&ar2->intf[0]->dev,
+			"%s(): urb status = %d\n", __func__, urb->status);
+	}
+
+	r = usb_submit_urb(urb, GFP_ATOMIC);
+	if (r)
+		dev_err(&ar2->intf[0]->dev,
+			"%s(): usb_submit_urb() = %d\n", __func__, r);
+}
+
+static void ati_remote2_complete_key(struct urb *urb)
+{
+	struct ati_remote2 *ar2 = urb->context;
+	int r;
+
+	switch (urb->status) {
+	case 0:
+		usb_mark_last_busy(ar2->udev);
+		ati_remote2_input_key(ar2);
+		break;
+	case -ENOENT:
+	case -EILSEQ:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		dev_dbg(&ar2->intf[1]->dev,
+			"%s(): urb status = %d\n", __func__, urb->status);
+		return;
+	default:
+		usb_mark_last_busy(ar2->udev);
+		dev_err(&ar2->intf[1]->dev,
+			"%s(): urb status = %d\n", __func__, urb->status);
+	}
+
+	r = usb_submit_urb(urb, GFP_ATOMIC);
+	if (r)
+		dev_err(&ar2->intf[1]->dev,
+			"%s(): usb_submit_urb() = %d\n", __func__, r);
+}
+
+static int ati_remote2_getkeycode(struct input_dev *idev,
+				  struct input_keymap_entry *ke)
+{
+	struct ati_remote2 *ar2 = input_get_drvdata(idev);
+	unsigned int mode;
+	int offset;
+	unsigned int index;
+	unsigned int scancode;
+
+	if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+		index = ke->index;
+		if (index >= ATI_REMOTE2_MODES *
+				ARRAY_SIZE(ati_remote2_key_table))
+			return -EINVAL;
+
+		mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
+		offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
+		scancode = (mode << 8) + ati_remote2_key_table[offset].hw_code;
+	} else {
+		if (input_scancode_to_scalar(ke, &scancode))
+			return -EINVAL;
+
+		mode = scancode >> 8;
+		if (mode > ATI_REMOTE2_PC)
+			return -EINVAL;
+
+		offset = ati_remote2_lookup(scancode & 0xff);
+		if (offset < 0)
+			return -EINVAL;
+
+		index = mode * ARRAY_SIZE(ati_remote2_key_table) + offset;
+	}
+
+	ke->keycode = ar2->keycode[mode][offset];
+	ke->len = sizeof(scancode);
+	memcpy(&ke->scancode, &scancode, sizeof(scancode));
+	ke->index = index;
+
+	return 0;
+}
+
+static int ati_remote2_setkeycode(struct input_dev *idev,
+				  const struct input_keymap_entry *ke,
+				  unsigned int *old_keycode)
+{
+	struct ati_remote2 *ar2 = input_get_drvdata(idev);
+	unsigned int mode;
+	int offset;
+	unsigned int index;
+	unsigned int scancode;
+
+	if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+		if (ke->index >= ATI_REMOTE2_MODES *
+				ARRAY_SIZE(ati_remote2_key_table))
+			return -EINVAL;
+
+		mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
+		offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
+	} else {
+		if (input_scancode_to_scalar(ke, &scancode))
+			return -EINVAL;
+
+		mode = scancode >> 8;
+		if (mode > ATI_REMOTE2_PC)
+			return -EINVAL;
+
+		offset = ati_remote2_lookup(scancode & 0xff);
+		if (offset < 0)
+			return -EINVAL;
+	}
+
+	*old_keycode = ar2->keycode[mode][offset];
+	ar2->keycode[mode][offset] = ke->keycode;
+	__set_bit(ke->keycode, idev->keybit);
+
+	for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
+		for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
+			if (ar2->keycode[mode][index] == *old_keycode)
+				return 0;
+		}
+	}
+
+	__clear_bit(*old_keycode, idev->keybit);
+
+	return 0;
+}
+
+static int ati_remote2_input_init(struct ati_remote2 *ar2)
+{
+	struct input_dev *idev;
+	int index, mode, retval;
+
+	idev = input_allocate_device();
+	if (!idev)
+		return -ENOMEM;
+
+	ar2->idev = idev;
+	input_set_drvdata(idev, ar2);
+
+	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
+	idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
+		BIT_MASK(BTN_RIGHT);
+	idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
+
+	for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
+		for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
+			ar2->keycode[mode][index] = ati_remote2_key_table[index].keycode;
+			__set_bit(ar2->keycode[mode][index], idev->keybit);
+		}
+	}
+
+	/* AUX1-AUX4 and PC generate the same scancode. */
+	index = ati_remote2_lookup(0x3f);
+	ar2->keycode[ATI_REMOTE2_AUX1][index] = KEY_PROG1;
+	ar2->keycode[ATI_REMOTE2_AUX2][index] = KEY_PROG2;
+	ar2->keycode[ATI_REMOTE2_AUX3][index] = KEY_PROG3;
+	ar2->keycode[ATI_REMOTE2_AUX4][index] = KEY_PROG4;
+	ar2->keycode[ATI_REMOTE2_PC][index] = KEY_PC;
+	__set_bit(KEY_PROG1, idev->keybit);
+	__set_bit(KEY_PROG2, idev->keybit);
+	__set_bit(KEY_PROG3, idev->keybit);
+	__set_bit(KEY_PROG4, idev->keybit);
+	__set_bit(KEY_PC, idev->keybit);
+
+	idev->rep[REP_DELAY]  = 250;
+	idev->rep[REP_PERIOD] = 33;
+
+	idev->open = ati_remote2_open;
+	idev->close = ati_remote2_close;
+
+	idev->getkeycode = ati_remote2_getkeycode;
+	idev->setkeycode = ati_remote2_setkeycode;
+
+	idev->name = ar2->name;
+	idev->phys = ar2->phys;
+
+	usb_to_input_id(ar2->udev, &idev->id);
+	idev->dev.parent = &ar2->udev->dev;
+
+	retval = input_register_device(idev);
+	if (retval)
+		input_free_device(idev);
+
+	return retval;
+}
+
+static int ati_remote2_urb_init(struct ati_remote2 *ar2)
+{
+	struct usb_device *udev = ar2->udev;
+	int i, pipe, maxp;
+
+	for (i = 0; i < 2; i++) {
+		ar2->buf[i] = usb_alloc_coherent(udev, 4, GFP_KERNEL, &ar2->buf_dma[i]);
+		if (!ar2->buf[i])
+			return -ENOMEM;
+
+		ar2->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
+		if (!ar2->urb[i])
+			return -ENOMEM;
+
+		pipe = usb_rcvintpipe(udev, ar2->ep[i]->bEndpointAddress);
+		maxp = usb_maxpacket(udev, pipe);
+		maxp = maxp > 4 ? 4 : maxp;
+
+		usb_fill_int_urb(ar2->urb[i], udev, pipe, ar2->buf[i], maxp,
+				 i ? ati_remote2_complete_key : ati_remote2_complete_mouse,
+				 ar2, ar2->ep[i]->bInterval);
+		ar2->urb[i]->transfer_dma = ar2->buf_dma[i];
+		ar2->urb[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+	}
+
+	return 0;
+}
+
+static void ati_remote2_urb_cleanup(struct ati_remote2 *ar2)
+{
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		usb_free_urb(ar2->urb[i]);
+		usb_free_coherent(ar2->udev, 4, ar2->buf[i], ar2->buf_dma[i]);
+	}
+}
+
+static int ati_remote2_setup(struct ati_remote2 *ar2, unsigned int ch_mask)
+{
+	int r, i, channel;
+
+	/*
+	 * Configure receiver to only accept input from remote "channel"
+	 *  channel == 0  -> Accept input from any remote channel
+	 *  channel == 1  -> Only accept input from remote channel 1
+	 *  channel == 2  -> Only accept input from remote channel 2
+	 *  ...
+	 *  channel == 16 -> Only accept input from remote channel 16
+	 */
+
+	channel = 0;
+	for (i = 0; i < 16; i++) {
+		if ((1 << i) & ch_mask) {
+			if (!(~(1 << i) & ch_mask))
+				channel = i + 1;
+			break;
+		}
+	}
+
+	r = usb_control_msg(ar2->udev, usb_sndctrlpipe(ar2->udev, 0),
+			    0x20,
+			    USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
+			    channel, 0x0, NULL, 0, USB_CTRL_SET_TIMEOUT);
+	if (r) {
+		dev_err(&ar2->udev->dev, "%s - failed to set channel due to error: %d\n",
+			__func__, r);
+		return r;
+	}
+
+	return 0;
+}
+
+static ssize_t ati_remote2_show_channel_mask(struct device *dev,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
+	struct ati_remote2 *ar2 = usb_get_intfdata(intf);
+
+	return sprintf(buf, "0x%04x\n", ar2->channel_mask);
+}
+
+static ssize_t ati_remote2_store_channel_mask(struct device *dev,
+					      struct device_attribute *attr,
+					      const char *buf, size_t count)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
+	struct ati_remote2 *ar2 = usb_get_intfdata(intf);
+	unsigned int mask;
+	int r;
+
+	r = kstrtouint(buf, 0, &mask);
+	if (r)
+		return r;
+
+	if (mask & ~ATI_REMOTE2_MAX_CHANNEL_MASK)
+		return -EINVAL;
+
+	r = usb_autopm_get_interface(ar2->intf[0]);
+	if (r) {
+		dev_err(&ar2->intf[0]->dev,
+			"%s(): usb_autopm_get_interface() = %d\n", __func__, r);
+		return r;
+	}
+
+	mutex_lock(&ati_remote2_mutex);
+
+	if (mask != ar2->channel_mask) {
+		r = ati_remote2_setup(ar2, mask);
+		if (!r)
+			ar2->channel_mask = mask;
+	}
+
+	mutex_unlock(&ati_remote2_mutex);
+
+	usb_autopm_put_interface(ar2->intf[0]);
+
+	return r ? r : count;
+}
+
+static ssize_t ati_remote2_show_mode_mask(struct device *dev,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
+	struct ati_remote2 *ar2 = usb_get_intfdata(intf);
+
+	return sprintf(buf, "0x%02x\n", ar2->mode_mask);
+}
+
+static ssize_t ati_remote2_store_mode_mask(struct device *dev,
+					   struct device_attribute *attr,
+					   const char *buf, size_t count)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
+	struct ati_remote2 *ar2 = usb_get_intfdata(intf);
+	unsigned int mask;
+	int err;
+
+	err = kstrtouint(buf, 0, &mask);
+	if (err)
+		return err;
+
+	if (mask & ~ATI_REMOTE2_MAX_MODE_MASK)
+		return -EINVAL;
+
+	ar2->mode_mask = mask;
+
+	return count;
+}
+
+static DEVICE_ATTR(channel_mask, 0644, ati_remote2_show_channel_mask,
+		   ati_remote2_store_channel_mask);
+
+static DEVICE_ATTR(mode_mask, 0644, ati_remote2_show_mode_mask,
+		   ati_remote2_store_mode_mask);
+
+static struct attribute *ati_remote2_attrs[] = {
+	&dev_attr_channel_mask.attr,
+	&dev_attr_mode_mask.attr,
+	NULL,
+};
+
+static struct attribute_group ati_remote2_attr_group = {
+	.attrs = ati_remote2_attrs,
+};
+
+static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(interface);
+	struct usb_host_interface *alt = interface->cur_altsetting;
+	struct ati_remote2 *ar2;
+	int r;
+
+	if (alt->desc.bInterfaceNumber)
+		return -ENODEV;
+
+	ar2 = kzalloc(sizeof (struct ati_remote2), GFP_KERNEL);
+	if (!ar2)
+		return -ENOMEM;
+
+	ar2->udev = udev;
+
+	/* Sanity check, first interface must have an endpoint */
+	if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
+		dev_err(&interface->dev,
+			"%s(): interface 0 must have an endpoint\n", __func__);
+		r = -ENODEV;
+		goto fail1;
+	}
+	ar2->intf[0] = interface;
+	ar2->ep[0] = &alt->endpoint[0].desc;
+
+	/* Sanity check, the device must have two interfaces */
+	ar2->intf[1] = usb_ifnum_to_if(udev, 1);
+	if ((udev->actconfig->desc.bNumInterfaces < 2) || !ar2->intf[1]) {
+		dev_err(&interface->dev, "%s(): need 2 interfaces, found %d\n",
+			__func__, udev->actconfig->desc.bNumInterfaces);
+		r = -ENODEV;
+		goto fail1;
+	}
+
+	r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
+	if (r)
+		goto fail1;
+
+	/* Sanity check, second interface must have an endpoint */
+	alt = ar2->intf[1]->cur_altsetting;
+	if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
+		dev_err(&interface->dev,
+			"%s(): interface 1 must have an endpoint\n", __func__);
+		r = -ENODEV;
+		goto fail2;
+	}
+	ar2->ep[1] = &alt->endpoint[0].desc;
+
+	r = ati_remote2_urb_init(ar2);
+	if (r)
+		goto fail3;
+
+	ar2->channel_mask = channel_mask;
+	ar2->mode_mask = mode_mask;
+
+	r = ati_remote2_setup(ar2, ar2->channel_mask);
+	if (r)
+		goto fail3;
+
+	usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
+	strlcat(ar2->phys, "/input0", sizeof(ar2->phys));
+
+	strlcat(ar2->name, "ATI Remote Wonder II", sizeof(ar2->name));
+
+	r = sysfs_create_group(&udev->dev.kobj, &ati_remote2_attr_group);
+	if (r)
+		goto fail3;
+
+	r = ati_remote2_input_init(ar2);
+	if (r)
+		goto fail4;
+
+	usb_set_intfdata(interface, ar2);
+
+	interface->needs_remote_wakeup = 1;
+
+	return 0;
+
+ fail4:
+	sysfs_remove_group(&udev->dev.kobj, &ati_remote2_attr_group);
+ fail3:
+	ati_remote2_urb_cleanup(ar2);
+ fail2:
+	usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
+ fail1:
+	kfree(ar2);
+
+	return r;
+}
+
+static void ati_remote2_disconnect(struct usb_interface *interface)
+{
+	struct ati_remote2 *ar2;
+	struct usb_host_interface *alt = interface->cur_altsetting;
+
+	if (alt->desc.bInterfaceNumber)
+		return;
+
+	ar2 = usb_get_intfdata(interface);
+	usb_set_intfdata(interface, NULL);
+
+	input_unregister_device(ar2->idev);
+
+	sysfs_remove_group(&ar2->udev->dev.kobj, &ati_remote2_attr_group);
+
+	ati_remote2_urb_cleanup(ar2);
+
+	usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
+
+	kfree(ar2);
+}
+
+static int ati_remote2_suspend(struct usb_interface *interface,
+			       pm_message_t message)
+{
+	struct ati_remote2 *ar2;
+	struct usb_host_interface *alt = interface->cur_altsetting;
+
+	if (alt->desc.bInterfaceNumber)
+		return 0;
+
+	ar2 = usb_get_intfdata(interface);
+
+	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+	mutex_lock(&ati_remote2_mutex);
+
+	if (ar2->flags & ATI_REMOTE2_OPENED)
+		ati_remote2_kill_urbs(ar2);
+
+	ar2->flags |= ATI_REMOTE2_SUSPENDED;
+
+	mutex_unlock(&ati_remote2_mutex);
+
+	return 0;
+}
+
+static int ati_remote2_resume(struct usb_interface *interface)
+{
+	struct ati_remote2 *ar2;
+	struct usb_host_interface *alt = interface->cur_altsetting;
+	int r = 0;
+
+	if (alt->desc.bInterfaceNumber)
+		return 0;
+
+	ar2 = usb_get_intfdata(interface);
+
+	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+	mutex_lock(&ati_remote2_mutex);
+
+	if (ar2->flags & ATI_REMOTE2_OPENED)
+		r = ati_remote2_submit_urbs(ar2);
+
+	if (!r)
+		ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
+
+	mutex_unlock(&ati_remote2_mutex);
+
+	return r;
+}
+
+static int ati_remote2_reset_resume(struct usb_interface *interface)
+{
+	struct ati_remote2 *ar2;
+	struct usb_host_interface *alt = interface->cur_altsetting;
+	int r = 0;
+
+	if (alt->desc.bInterfaceNumber)
+		return 0;
+
+	ar2 = usb_get_intfdata(interface);
+
+	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+	mutex_lock(&ati_remote2_mutex);
+
+	r = ati_remote2_setup(ar2, ar2->channel_mask);
+	if (r)
+		goto out;
+
+	if (ar2->flags & ATI_REMOTE2_OPENED)
+		r = ati_remote2_submit_urbs(ar2);
+
+	if (!r)
+		ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
+
+ out:
+	mutex_unlock(&ati_remote2_mutex);
+
+	return r;
+}
+
+static int ati_remote2_pre_reset(struct usb_interface *interface)
+{
+	struct ati_remote2 *ar2;
+	struct usb_host_interface *alt = interface->cur_altsetting;
+
+	if (alt->desc.bInterfaceNumber)
+		return 0;
+
+	ar2 = usb_get_intfdata(interface);
+
+	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+	mutex_lock(&ati_remote2_mutex);
+
+	if (ar2->flags == ATI_REMOTE2_OPENED)
+		ati_remote2_kill_urbs(ar2);
+
+	return 0;
+}
+
+static int ati_remote2_post_reset(struct usb_interface *interface)
+{
+	struct ati_remote2 *ar2;
+	struct usb_host_interface *alt = interface->cur_altsetting;
+	int r = 0;
+
+	if (alt->desc.bInterfaceNumber)
+		return 0;
+
+	ar2 = usb_get_intfdata(interface);
+
+	dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+	if (ar2->flags == ATI_REMOTE2_OPENED)
+		r = ati_remote2_submit_urbs(ar2);
+
+	mutex_unlock(&ati_remote2_mutex);
+
+	return r;
+}
+
+module_usb_driver(ati_remote2_driver);