xref: /openbmc/linux/drivers/media/rc/ati_remote.c (revision b34e08d5)
1 /*
2  *  USB ATI Remote support
3  *
4  *                Copyright (c) 2011, 2012 Anssi Hannula <anssi.hannula@iki.fi>
5  *  Version 2.2.0 Copyright (c) 2004 Torrey Hoffman <thoffman@arnor.net>
6  *  Version 2.1.1 Copyright (c) 2002 Vladimir Dergachev
7  *
8  *  This 2.2.0 version is a rewrite / cleanup of the 2.1.1 driver, including
9  *  porting to the 2.6 kernel interfaces, along with other modification
10  *  to better match the style of the existing usb/input drivers.  However, the
11  *  protocol and hardware handling is essentially unchanged from 2.1.1.
12  *
13  *  The 2.1.1 driver was derived from the usbati_remote and usbkbd drivers by
14  *  Vojtech Pavlik.
15  *
16  *  Changes:
17  *
18  *  Feb 2004: Torrey Hoffman <thoffman@arnor.net>
19  *            Version 2.2.0
20  *  Jun 2004: Torrey Hoffman <thoffman@arnor.net>
21  *            Version 2.2.1
22  *            Added key repeat support contributed by:
23  *                Vincent Vanackere <vanackere@lif.univ-mrs.fr>
24  *            Added support for the "Lola" remote contributed by:
25  *                Seth Cohn <sethcohn@yahoo.com>
26  *
27  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
28  *
29  * This program is free software; you can redistribute it and/or modify
30  * it under the terms of the GNU General Public License as published by
31  * the Free Software Foundation; either version 2 of the License, or
32  * (at your option) any later version.
33  *
34  * This program is distributed in the hope that it will be useful,
35  * but WITHOUT ANY WARRANTY; without even the implied warranty of
36  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
37  * GNU General Public License for more details.
38  *
39  * You should have received a copy of the GNU General Public License
40  * along with this program; if not, write to the Free Software
41  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
42  *
43  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
44  *
45  * Hardware & software notes
46  *
47  * These remote controls are distributed by ATI as part of their
48  * "All-In-Wonder" video card packages.  The receiver self-identifies as a
49  * "USB Receiver" with manufacturer "X10 Wireless Technology Inc".
50  *
51  * The "Lola" remote is available from X10.  See:
52  *    http://www.x10.com/products/lola_sg1.htm
53  * The Lola is similar to the ATI remote but has no mouse support, and slightly
54  * different keys.
55  *
56  * It is possible to use multiple receivers and remotes on multiple computers
57  * simultaneously by configuring them to use specific channels.
58  *
59  * The RF protocol used by the remote supports 16 distinct channels, 1 to 16.
60  * Actually, it may even support more, at least in some revisions of the
61  * hardware.
62  *
63  * Each remote can be configured to transmit on one channel as follows:
64  *   - Press and hold the "hand icon" button.
65  *   - When the red LED starts to blink, let go of the "hand icon" button.
66  *   - When it stops blinking, input the channel code as two digits, from 01
67  *     to 16, and press the hand icon again.
68  *
69  * The timing can be a little tricky.  Try loading the module with debug=1
70  * to have the kernel print out messages about the remote control number
71  * and mask.  Note: debugging prints remote numbers as zero-based hexadecimal.
72  *
73  * The driver has a "channel_mask" parameter. This bitmask specifies which
74  * channels will be ignored by the module.  To mask out channels, just add
75  * all the 2^channel_number values together.
76  *
77  * For instance, set channel_mask = 2^4 = 16 (binary 10000) to make ati_remote
78  * ignore signals coming from remote controls transmitting on channel 4, but
79  * accept all other channels.
80  *
81  * Or, set channel_mask = 65533, (0xFFFD), and all channels except 1 will be
82  * ignored.
83  *
84  * The default is 0 (respond to all channels). Bit 0 and bits 17-32 of this
85  * parameter are unused.
86  *
87  */
88 
89 #include <linux/kernel.h>
90 #include <linux/errno.h>
91 #include <linux/init.h>
92 #include <linux/slab.h>
93 #include <linux/module.h>
94 #include <linux/mutex.h>
95 #include <linux/usb/input.h>
96 #include <linux/wait.h>
97 #include <linux/jiffies.h>
98 #include <media/rc-core.h>
99 
100 /*
101  * Module and Version Information, Module Parameters
102  */
103 
104 #define ATI_REMOTE_VENDOR_ID		0x0bc7
105 #define LOLA_REMOTE_PRODUCT_ID		0x0002
106 #define LOLA2_REMOTE_PRODUCT_ID		0x0003
107 #define ATI_REMOTE_PRODUCT_ID		0x0004
108 #define NVIDIA_REMOTE_PRODUCT_ID	0x0005
109 #define MEDION_REMOTE_PRODUCT_ID	0x0006
110 #define FIREFLY_REMOTE_PRODUCT_ID	0x0008
111 
112 #define DRIVER_VERSION		"2.2.1"
113 #define DRIVER_AUTHOR           "Torrey Hoffman <thoffman@arnor.net>"
114 #define DRIVER_DESC             "ATI/X10 RF USB Remote Control"
115 
116 #define NAME_BUFSIZE      80    /* size of product name, path buffers */
117 #define DATA_BUFSIZE      63    /* size of URB data buffers */
118 
119 /*
120  * Duplicate event filtering time.
121  * Sequential, identical KIND_FILTERED inputs with less than
122  * FILTER_TIME milliseconds between them are considered as repeat
123  * events. The hardware generates 5 events for the first keypress
124  * and we have to take this into account for an accurate repeat
125  * behaviour.
126  */
127 #define FILTER_TIME	60 /* msec */
128 #define REPEAT_DELAY	500 /* msec */
129 
130 static unsigned long channel_mask;
131 module_param(channel_mask, ulong, 0644);
132 MODULE_PARM_DESC(channel_mask, "Bitmask of remote control channels to ignore");
133 
134 static int debug;
135 module_param(debug, int, 0644);
136 MODULE_PARM_DESC(debug, "Enable extra debug messages and information");
137 
138 static int repeat_filter = FILTER_TIME;
139 module_param(repeat_filter, int, 0644);
140 MODULE_PARM_DESC(repeat_filter, "Repeat filter time, default = 60 msec");
141 
142 static int repeat_delay = REPEAT_DELAY;
143 module_param(repeat_delay, int, 0644);
144 MODULE_PARM_DESC(repeat_delay, "Delay before sending repeats, default = 500 msec");
145 
146 static bool mouse = true;
147 module_param(mouse, bool, 0444);
148 MODULE_PARM_DESC(mouse, "Enable mouse device, default = yes");
149 
150 #define dbginfo(dev, format, arg...) \
151 	do { if (debug) dev_info(dev , format , ## arg); } while (0)
152 #undef err
153 #define err(format, arg...) printk(KERN_ERR format , ## arg)
154 
155 struct ati_receiver_type {
156 	/* either default_keymap or get_default_keymap should be set */
157 	const char *default_keymap;
158 	const char *(*get_default_keymap)(struct usb_interface *interface);
159 };
160 
161 static const char *get_medion_keymap(struct usb_interface *interface)
162 {
163 	struct usb_device *udev = interface_to_usbdev(interface);
164 
165 	/*
166 	 * There are many different Medion remotes shipped with a receiver
167 	 * with the same usb id, but the receivers have subtle differences
168 	 * in the USB descriptors allowing us to detect them.
169 	 */
170 
171 	if (udev->manufacturer && udev->product) {
172 		if (udev->actconfig->desc.bmAttributes & USB_CONFIG_ATT_WAKEUP) {
173 
174 			if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
175 			    && !strcmp(udev->product, "USB Receiver"))
176 				return RC_MAP_MEDION_X10_DIGITAINER;
177 
178 			if (!strcmp(udev->manufacturer, "X10 WTI")
179 			    && !strcmp(udev->product, "RF receiver"))
180 				return RC_MAP_MEDION_X10_OR2X;
181 		} else {
182 
183 			 if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
184 			    && !strcmp(udev->product, "USB Receiver"))
185 				return RC_MAP_MEDION_X10;
186 		}
187 	}
188 
189 	dev_info(&interface->dev,
190 		 "Unknown Medion X10 receiver, using default ati_remote Medion keymap\n");
191 
192 	return RC_MAP_MEDION_X10;
193 }
194 
195 static const struct ati_receiver_type type_ati		= {
196 	.default_keymap = RC_MAP_ATI_X10
197 };
198 static const struct ati_receiver_type type_medion	= {
199 	.get_default_keymap = get_medion_keymap
200 };
201 static const struct ati_receiver_type type_firefly	= {
202 	.default_keymap = RC_MAP_SNAPSTREAM_FIREFLY
203 };
204 
205 static struct usb_device_id ati_remote_table[] = {
206 	{
207 		USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA_REMOTE_PRODUCT_ID),
208 		.driver_info = (unsigned long)&type_ati
209 	},
210 	{
211 		USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA2_REMOTE_PRODUCT_ID),
212 		.driver_info = (unsigned long)&type_ati
213 	},
214 	{
215 		USB_DEVICE(ATI_REMOTE_VENDOR_ID, ATI_REMOTE_PRODUCT_ID),
216 		.driver_info = (unsigned long)&type_ati
217 	},
218 	{
219 		USB_DEVICE(ATI_REMOTE_VENDOR_ID, NVIDIA_REMOTE_PRODUCT_ID),
220 		.driver_info = (unsigned long)&type_ati
221 	},
222 	{
223 		USB_DEVICE(ATI_REMOTE_VENDOR_ID, MEDION_REMOTE_PRODUCT_ID),
224 		.driver_info = (unsigned long)&type_medion
225 	},
226 	{
227 		USB_DEVICE(ATI_REMOTE_VENDOR_ID, FIREFLY_REMOTE_PRODUCT_ID),
228 		.driver_info = (unsigned long)&type_firefly
229 	},
230 	{}	/* Terminating entry */
231 };
232 
233 MODULE_DEVICE_TABLE(usb, ati_remote_table);
234 
235 /* Get hi and low bytes of a 16-bits int */
236 #define HI(a)	((unsigned char)((a) >> 8))
237 #define LO(a)	((unsigned char)((a) & 0xff))
238 
239 #define SEND_FLAG_IN_PROGRESS	1
240 #define SEND_FLAG_COMPLETE	2
241 
242 /* Device initialization strings */
243 static char init1[] = { 0x01, 0x00, 0x20, 0x14 };
244 static char init2[] = { 0x01, 0x00, 0x20, 0x14, 0x20, 0x20, 0x20 };
245 
246 struct ati_remote {
247 	struct input_dev *idev;
248 	struct rc_dev *rdev;
249 	struct usb_device *udev;
250 	struct usb_interface *interface;
251 
252 	struct urb *irq_urb;
253 	struct urb *out_urb;
254 	struct usb_endpoint_descriptor *endpoint_in;
255 	struct usb_endpoint_descriptor *endpoint_out;
256 	unsigned char *inbuf;
257 	unsigned char *outbuf;
258 	dma_addr_t inbuf_dma;
259 	dma_addr_t outbuf_dma;
260 
261 	unsigned char old_data;     /* Detect duplicate events */
262 	unsigned long old_jiffies;
263 	unsigned long acc_jiffies;  /* handle acceleration */
264 	unsigned long first_jiffies;
265 
266 	unsigned int repeat_count;
267 
268 	char rc_name[NAME_BUFSIZE];
269 	char rc_phys[NAME_BUFSIZE];
270 	char mouse_name[NAME_BUFSIZE];
271 	char mouse_phys[NAME_BUFSIZE];
272 
273 	wait_queue_head_t wait;
274 	int send_flags;
275 
276 	int users; /* 0-2, users are rc and input */
277 	struct mutex open_mutex;
278 };
279 
280 /* "Kinds" of messages sent from the hardware to the driver. */
281 #define KIND_END        0
282 #define KIND_LITERAL    1   /* Simply pass to input system */
283 #define KIND_FILTERED   2   /* Add artificial key-up events, drop keyrepeats */
284 #define KIND_LU         3   /* Directional keypad diagonals - left up, */
285 #define KIND_RU         4   /*   right up,  */
286 #define KIND_LD         5   /*   left down, */
287 #define KIND_RD         6   /*   right down */
288 #define KIND_ACCEL      7   /* Directional keypad - left, right, up, down.*/
289 
290 /* Translation table from hardware messages to input events. */
291 static const struct {
292 	short kind;
293 	unsigned char data;
294 	int type;
295 	unsigned int code;
296 	int value;
297 }  ati_remote_tbl[] = {
298 	/* Directional control pad axes */
299 	{KIND_ACCEL,   0x70, EV_REL, REL_X, -1},   /* left */
300 	{KIND_ACCEL,   0x71, EV_REL, REL_X, 1},    /* right */
301 	{KIND_ACCEL,   0x72, EV_REL, REL_Y, -1},   /* up */
302 	{KIND_ACCEL,   0x73, EV_REL, REL_Y, 1},    /* down */
303 	/* Directional control pad diagonals */
304 	{KIND_LU,      0x74, EV_REL, 0, 0},        /* left up */
305 	{KIND_RU,      0x75, EV_REL, 0, 0},        /* right up */
306 	{KIND_LD,      0x77, EV_REL, 0, 0},        /* left down */
307 	{KIND_RD,      0x76, EV_REL, 0, 0},        /* right down */
308 
309 	/* "Mouse button" buttons */
310 	{KIND_LITERAL, 0x78, EV_KEY, BTN_LEFT, 1}, /* left btn down */
311 	{KIND_LITERAL, 0x79, EV_KEY, BTN_LEFT, 0}, /* left btn up */
312 	{KIND_LITERAL, 0x7c, EV_KEY, BTN_RIGHT, 1},/* right btn down */
313 	{KIND_LITERAL, 0x7d, EV_KEY, BTN_RIGHT, 0},/* right btn up */
314 
315 	/* Artificial "doubleclick" events are generated by the hardware.
316 	 * They are mapped to the "side" and "extra" mouse buttons here. */
317 	{KIND_FILTERED, 0x7a, EV_KEY, BTN_SIDE, 1}, /* left dblclick */
318 	{KIND_FILTERED, 0x7e, EV_KEY, BTN_EXTRA, 1},/* right dblclick */
319 
320 	/* Non-mouse events are handled by rc-core */
321 	{KIND_END, 0x00, EV_MAX + 1, 0, 0}
322 };
323 
324 /*
325  * ati_remote_dump_input
326  */
327 static void ati_remote_dump(struct device *dev, unsigned char *data,
328 			    unsigned int len)
329 {
330 	if (len == 1) {
331 		if (data[0] != (unsigned char)0xff && data[0] != 0x00)
332 			dev_warn(dev, "Weird byte 0x%02x\n", data[0]);
333 	} else if (len == 4)
334 		dev_warn(dev, "Weird key %*ph\n", 4, data);
335 	else
336 		dev_warn(dev, "Weird data, len=%d %*ph ...\n", len, 6, data);
337 }
338 
339 /*
340  * ati_remote_open
341  */
342 static int ati_remote_open(struct ati_remote *ati_remote)
343 {
344 	int err = 0;
345 
346 	mutex_lock(&ati_remote->open_mutex);
347 
348 	if (ati_remote->users++ != 0)
349 		goto out; /* one was already active */
350 
351 	/* On first open, submit the read urb which was set up previously. */
352 	ati_remote->irq_urb->dev = ati_remote->udev;
353 	if (usb_submit_urb(ati_remote->irq_urb, GFP_KERNEL)) {
354 		dev_err(&ati_remote->interface->dev,
355 			"%s: usb_submit_urb failed!\n", __func__);
356 		err = -EIO;
357 	}
358 
359 out:	mutex_unlock(&ati_remote->open_mutex);
360 	return err;
361 }
362 
363 /*
364  * ati_remote_close
365  */
366 static void ati_remote_close(struct ati_remote *ati_remote)
367 {
368 	mutex_lock(&ati_remote->open_mutex);
369 	if (--ati_remote->users == 0)
370 		usb_kill_urb(ati_remote->irq_urb);
371 	mutex_unlock(&ati_remote->open_mutex);
372 }
373 
374 static int ati_remote_input_open(struct input_dev *inputdev)
375 {
376 	struct ati_remote *ati_remote = input_get_drvdata(inputdev);
377 	return ati_remote_open(ati_remote);
378 }
379 
380 static void ati_remote_input_close(struct input_dev *inputdev)
381 {
382 	struct ati_remote *ati_remote = input_get_drvdata(inputdev);
383 	ati_remote_close(ati_remote);
384 }
385 
386 static int ati_remote_rc_open(struct rc_dev *rdev)
387 {
388 	struct ati_remote *ati_remote = rdev->priv;
389 	return ati_remote_open(ati_remote);
390 }
391 
392 static void ati_remote_rc_close(struct rc_dev *rdev)
393 {
394 	struct ati_remote *ati_remote = rdev->priv;
395 	ati_remote_close(ati_remote);
396 }
397 
398 /*
399  * ati_remote_irq_out
400  */
401 static void ati_remote_irq_out(struct urb *urb)
402 {
403 	struct ati_remote *ati_remote = urb->context;
404 
405 	if (urb->status) {
406 		dev_dbg(&ati_remote->interface->dev, "%s: status %d\n",
407 			__func__, urb->status);
408 		return;
409 	}
410 
411 	ati_remote->send_flags |= SEND_FLAG_COMPLETE;
412 	wmb();
413 	wake_up(&ati_remote->wait);
414 }
415 
416 /*
417  * ati_remote_sendpacket
418  *
419  * Used to send device initialization strings
420  */
421 static int ati_remote_sendpacket(struct ati_remote *ati_remote, u16 cmd,
422 	unsigned char *data)
423 {
424 	int retval = 0;
425 
426 	/* Set up out_urb */
427 	memcpy(ati_remote->out_urb->transfer_buffer + 1, data, LO(cmd));
428 	((char *) ati_remote->out_urb->transfer_buffer)[0] = HI(cmd);
429 
430 	ati_remote->out_urb->transfer_buffer_length = LO(cmd) + 1;
431 	ati_remote->out_urb->dev = ati_remote->udev;
432 	ati_remote->send_flags = SEND_FLAG_IN_PROGRESS;
433 
434 	retval = usb_submit_urb(ati_remote->out_urb, GFP_ATOMIC);
435 	if (retval) {
436 		dev_dbg(&ati_remote->interface->dev,
437 			 "sendpacket: usb_submit_urb failed: %d\n", retval);
438 		return retval;
439 	}
440 
441 	wait_event_timeout(ati_remote->wait,
442 		((ati_remote->out_urb->status != -EINPROGRESS) ||
443 			(ati_remote->send_flags & SEND_FLAG_COMPLETE)),
444 		HZ);
445 	usb_kill_urb(ati_remote->out_urb);
446 
447 	return retval;
448 }
449 
450 /*
451  * ati_remote_compute_accel
452  *
453  * Implements acceleration curve for directional control pad
454  * If elapsed time since last event is > 1/4 second, user "stopped",
455  * so reset acceleration. Otherwise, user is probably holding the control
456  * pad down, so we increase acceleration, ramping up over two seconds to
457  * a maximum speed.
458  */
459 static int ati_remote_compute_accel(struct ati_remote *ati_remote)
460 {
461 	static const char accel[] = { 1, 2, 4, 6, 9, 13, 20 };
462 	unsigned long now = jiffies;
463 	int acc;
464 
465 	if (time_after(now, ati_remote->old_jiffies + msecs_to_jiffies(250))) {
466 		acc = 1;
467 		ati_remote->acc_jiffies = now;
468 	}
469 	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(125)))
470 		acc = accel[0];
471 	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(250)))
472 		acc = accel[1];
473 	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(500)))
474 		acc = accel[2];
475 	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(1000)))
476 		acc = accel[3];
477 	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(1500)))
478 		acc = accel[4];
479 	else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(2000)))
480 		acc = accel[5];
481 	else
482 		acc = accel[6];
483 
484 	return acc;
485 }
486 
487 /*
488  * ati_remote_report_input
489  */
490 static void ati_remote_input_report(struct urb *urb)
491 {
492 	struct ati_remote *ati_remote = urb->context;
493 	unsigned char *data= ati_remote->inbuf;
494 	struct input_dev *dev = ati_remote->idev;
495 	int index = -1;
496 	int acc;
497 	int remote_num;
498 	unsigned char scancode;
499 	u32 wheel_keycode = KEY_RESERVED;
500 	int i;
501 
502 	/*
503 	 * data[0] = 0x14
504 	 * data[1] = data[2] + data[3] + 0xd5 (a checksum byte)
505 	 * data[2] = the key code (with toggle bit in MSB with some models)
506 	 * data[3] = channel << 4 (the low 4 bits must be zero)
507 	 */
508 
509 	/* Deal with strange looking inputs */
510 	if ( (urb->actual_length != 4) || (data[0] != 0x14) ||
511 		((data[3] & 0x0f) != 0x00) ) {
512 		ati_remote_dump(&urb->dev->dev, data, urb->actual_length);
513 		return;
514 	}
515 
516 	if (data[1] != ((data[2] + data[3] + 0xd5) & 0xff)) {
517 		dbginfo(&ati_remote->interface->dev,
518 			"wrong checksum in input: %*ph\n", 4, data);
519 		return;
520 	}
521 
522 	/* Mask unwanted remote channels.  */
523 	/* note: remote_num is 0-based, channel 1 on remote == 0 here */
524 	remote_num = (data[3] >> 4) & 0x0f;
525 	if (channel_mask & (1 << (remote_num + 1))) {
526 		dbginfo(&ati_remote->interface->dev,
527 			"Masked input from channel 0x%02x: data %02x,%02x, "
528 			"mask= 0x%02lx\n",
529 			remote_num, data[1], data[2], channel_mask);
530 		return;
531 	}
532 
533 	/*
534 	 * MSB is a toggle code, though only used by some devices
535 	 * (e.g. SnapStream Firefly)
536 	 */
537 	scancode = data[2] & 0x7f;
538 
539 	dbginfo(&ati_remote->interface->dev,
540 		"channel 0x%02x; key data %02x, scancode %02x\n",
541 		remote_num, data[2], scancode);
542 
543 	if (scancode >= 0x70) {
544 		/*
545 		 * This is either a mouse or scrollwheel event, depending on
546 		 * the remote/keymap.
547 		 * Get the keycode assigned to scancode 0x78/0x70. If it is
548 		 * set, assume this is a scrollwheel up/down event.
549 		 */
550 		wheel_keycode = rc_g_keycode_from_table(ati_remote->rdev,
551 							scancode & 0x78);
552 
553 		if (wheel_keycode == KEY_RESERVED) {
554 			/* scrollwheel was not mapped, assume mouse */
555 
556 			/* Look up event code index in the mouse translation
557 			 * table.
558 			 */
559 			for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++) {
560 				if (scancode == ati_remote_tbl[i].data) {
561 					index = i;
562 					break;
563 				}
564 			}
565 		}
566 	}
567 
568 	if (index >= 0 && ati_remote_tbl[index].kind == KIND_LITERAL) {
569 		input_event(dev, ati_remote_tbl[index].type,
570 			ati_remote_tbl[index].code,
571 			ati_remote_tbl[index].value);
572 		input_sync(dev);
573 
574 		ati_remote->old_jiffies = jiffies;
575 		return;
576 	}
577 
578 	if (index < 0 || ati_remote_tbl[index].kind == KIND_FILTERED) {
579 		unsigned long now = jiffies;
580 
581 		/* Filter duplicate events which happen "too close" together. */
582 		if (ati_remote->old_data == data[2] &&
583 		    time_before(now, ati_remote->old_jiffies +
584 				     msecs_to_jiffies(repeat_filter))) {
585 			ati_remote->repeat_count++;
586 		} else {
587 			ati_remote->repeat_count = 0;
588 			ati_remote->first_jiffies = now;
589 		}
590 
591 		ati_remote->old_data = data[2];
592 		ati_remote->old_jiffies = now;
593 
594 		/* Ensure we skip at least the 4 first duplicate events (generated
595 		 * by a single keypress), and continue skipping until repeat_delay
596 		 * msecs have passed
597 		 */
598 		if (ati_remote->repeat_count > 0 &&
599 		    (ati_remote->repeat_count < 5 ||
600 		     time_before(now, ati_remote->first_jiffies +
601 				      msecs_to_jiffies(repeat_delay))))
602 			return;
603 
604 		if (index < 0) {
605 			/* Not a mouse event, hand it to rc-core. */
606 			int count = 1;
607 
608 			if (wheel_keycode != KEY_RESERVED) {
609 				/*
610 				 * This is a scrollwheel event, send the
611 				 * scroll up (0x78) / down (0x70) scancode
612 				 * repeatedly as many times as indicated by
613 				 * rest of the scancode.
614 				 */
615 				count = (scancode & 0x07) + 1;
616 				scancode &= 0x78;
617 			}
618 
619 			while (count--) {
620 				/*
621 				* We don't use the rc-core repeat handling yet as
622 				* it would cause ghost repeats which would be a
623 				* regression for this driver.
624 				*/
625 				rc_keydown_notimeout(ati_remote->rdev, scancode,
626 						     data[2]);
627 				rc_keyup(ati_remote->rdev);
628 			}
629 			return;
630 		}
631 
632 		input_event(dev, ati_remote_tbl[index].type,
633 			ati_remote_tbl[index].code, 1);
634 		input_sync(dev);
635 		input_event(dev, ati_remote_tbl[index].type,
636 			ati_remote_tbl[index].code, 0);
637 		input_sync(dev);
638 
639 	} else {
640 
641 		/*
642 		 * Other event kinds are from the directional control pad, and
643 		 * have an acceleration factor applied to them.  Without this
644 		 * acceleration, the control pad is mostly unusable.
645 		 */
646 		acc = ati_remote_compute_accel(ati_remote);
647 
648 		switch (ati_remote_tbl[index].kind) {
649 		case KIND_ACCEL:
650 			input_event(dev, ati_remote_tbl[index].type,
651 				ati_remote_tbl[index].code,
652 				ati_remote_tbl[index].value * acc);
653 			break;
654 		case KIND_LU:
655 			input_report_rel(dev, REL_X, -acc);
656 			input_report_rel(dev, REL_Y, -acc);
657 			break;
658 		case KIND_RU:
659 			input_report_rel(dev, REL_X, acc);
660 			input_report_rel(dev, REL_Y, -acc);
661 			break;
662 		case KIND_LD:
663 			input_report_rel(dev, REL_X, -acc);
664 			input_report_rel(dev, REL_Y, acc);
665 			break;
666 		case KIND_RD:
667 			input_report_rel(dev, REL_X, acc);
668 			input_report_rel(dev, REL_Y, acc);
669 			break;
670 		default:
671 			dev_dbg(&ati_remote->interface->dev,
672 				"ati_remote kind=%d\n",
673 				ati_remote_tbl[index].kind);
674 		}
675 		input_sync(dev);
676 
677 		ati_remote->old_jiffies = jiffies;
678 		ati_remote->old_data = data[2];
679 	}
680 }
681 
682 /*
683  * ati_remote_irq_in
684  */
685 static void ati_remote_irq_in(struct urb *urb)
686 {
687 	struct ati_remote *ati_remote = urb->context;
688 	int retval;
689 
690 	switch (urb->status) {
691 	case 0:			/* success */
692 		ati_remote_input_report(urb);
693 		break;
694 	case -ECONNRESET:	/* unlink */
695 	case -ENOENT:
696 	case -ESHUTDOWN:
697 		dev_dbg(&ati_remote->interface->dev,
698 			"%s: urb error status, unlink?\n",
699 			__func__);
700 		return;
701 	default:		/* error */
702 		dev_dbg(&ati_remote->interface->dev,
703 			"%s: Nonzero urb status %d\n",
704 			__func__, urb->status);
705 	}
706 
707 	retval = usb_submit_urb(urb, GFP_ATOMIC);
708 	if (retval)
709 		dev_err(&ati_remote->interface->dev,
710 			"%s: usb_submit_urb()=%d\n",
711 			__func__, retval);
712 }
713 
714 /*
715  * ati_remote_alloc_buffers
716  */
717 static int ati_remote_alloc_buffers(struct usb_device *udev,
718 				    struct ati_remote *ati_remote)
719 {
720 	ati_remote->inbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
721 					       &ati_remote->inbuf_dma);
722 	if (!ati_remote->inbuf)
723 		return -1;
724 
725 	ati_remote->outbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
726 						&ati_remote->outbuf_dma);
727 	if (!ati_remote->outbuf)
728 		return -1;
729 
730 	ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
731 	if (!ati_remote->irq_urb)
732 		return -1;
733 
734 	ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
735 	if (!ati_remote->out_urb)
736 		return -1;
737 
738 	return 0;
739 }
740 
741 /*
742  * ati_remote_free_buffers
743  */
744 static void ati_remote_free_buffers(struct ati_remote *ati_remote)
745 {
746 	usb_free_urb(ati_remote->irq_urb);
747 	usb_free_urb(ati_remote->out_urb);
748 
749 	usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
750 		ati_remote->inbuf, ati_remote->inbuf_dma);
751 
752 	usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
753 		ati_remote->outbuf, ati_remote->outbuf_dma);
754 }
755 
756 static void ati_remote_input_init(struct ati_remote *ati_remote)
757 {
758 	struct input_dev *idev = ati_remote->idev;
759 	int i;
760 
761 	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
762 	idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
763 		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
764 	idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
765 	for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++)
766 		if (ati_remote_tbl[i].type == EV_KEY)
767 			set_bit(ati_remote_tbl[i].code, idev->keybit);
768 
769 	input_set_drvdata(idev, ati_remote);
770 
771 	idev->open = ati_remote_input_open;
772 	idev->close = ati_remote_input_close;
773 
774 	idev->name = ati_remote->mouse_name;
775 	idev->phys = ati_remote->mouse_phys;
776 
777 	usb_to_input_id(ati_remote->udev, &idev->id);
778 	idev->dev.parent = &ati_remote->interface->dev;
779 }
780 
781 static void ati_remote_rc_init(struct ati_remote *ati_remote)
782 {
783 	struct rc_dev *rdev = ati_remote->rdev;
784 
785 	rdev->priv = ati_remote;
786 	rdev->driver_type = RC_DRIVER_SCANCODE;
787 	rc_set_allowed_protocols(rdev, RC_BIT_OTHER);
788 	rdev->driver_name = "ati_remote";
789 
790 	rdev->open = ati_remote_rc_open;
791 	rdev->close = ati_remote_rc_close;
792 
793 	rdev->input_name = ati_remote->rc_name;
794 	rdev->input_phys = ati_remote->rc_phys;
795 
796 	usb_to_input_id(ati_remote->udev, &rdev->input_id);
797 	rdev->dev.parent = &ati_remote->interface->dev;
798 }
799 
800 static int ati_remote_initialize(struct ati_remote *ati_remote)
801 {
802 	struct usb_device *udev = ati_remote->udev;
803 	int pipe, maxp;
804 
805 	init_waitqueue_head(&ati_remote->wait);
806 
807 	/* Set up irq_urb */
808 	pipe = usb_rcvintpipe(udev, ati_remote->endpoint_in->bEndpointAddress);
809 	maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
810 	maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
811 
812 	usb_fill_int_urb(ati_remote->irq_urb, udev, pipe, ati_remote->inbuf,
813 			 maxp, ati_remote_irq_in, ati_remote,
814 			 ati_remote->endpoint_in->bInterval);
815 	ati_remote->irq_urb->transfer_dma = ati_remote->inbuf_dma;
816 	ati_remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
817 
818 	/* Set up out_urb */
819 	pipe = usb_sndintpipe(udev, ati_remote->endpoint_out->bEndpointAddress);
820 	maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
821 	maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
822 
823 	usb_fill_int_urb(ati_remote->out_urb, udev, pipe, ati_remote->outbuf,
824 			 maxp, ati_remote_irq_out, ati_remote,
825 			 ati_remote->endpoint_out->bInterval);
826 	ati_remote->out_urb->transfer_dma = ati_remote->outbuf_dma;
827 	ati_remote->out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
828 
829 	/* send initialization strings */
830 	if ((ati_remote_sendpacket(ati_remote, 0x8004, init1)) ||
831 	    (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
832 		dev_err(&ati_remote->interface->dev,
833 			 "Initializing ati_remote hardware failed.\n");
834 		return -EIO;
835 	}
836 
837 	return 0;
838 }
839 
840 /*
841  * ati_remote_probe
842  */
843 static int ati_remote_probe(struct usb_interface *interface,
844 	const struct usb_device_id *id)
845 {
846 	struct usb_device *udev = interface_to_usbdev(interface);
847 	struct usb_host_interface *iface_host = interface->cur_altsetting;
848 	struct usb_endpoint_descriptor *endpoint_in, *endpoint_out;
849 	struct ati_receiver_type *type = (struct ati_receiver_type *)id->driver_info;
850 	struct ati_remote *ati_remote;
851 	struct input_dev *input_dev;
852 	struct rc_dev *rc_dev;
853 	int err = -ENOMEM;
854 
855 	if (iface_host->desc.bNumEndpoints != 2) {
856 		err("%s: Unexpected desc.bNumEndpoints\n", __func__);
857 		return -ENODEV;
858 	}
859 
860 	endpoint_in = &iface_host->endpoint[0].desc;
861 	endpoint_out = &iface_host->endpoint[1].desc;
862 
863 	if (!usb_endpoint_is_int_in(endpoint_in)) {
864 		err("%s: Unexpected endpoint_in\n", __func__);
865 		return -ENODEV;
866 	}
867 	if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
868 		err("%s: endpoint_in message size==0? \n", __func__);
869 		return -ENODEV;
870 	}
871 
872 	ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
873 	rc_dev = rc_allocate_device();
874 	if (!ati_remote || !rc_dev)
875 		goto exit_free_dev_rdev;
876 
877 	/* Allocate URB buffers, URBs */
878 	if (ati_remote_alloc_buffers(udev, ati_remote))
879 		goto exit_free_buffers;
880 
881 	ati_remote->endpoint_in = endpoint_in;
882 	ati_remote->endpoint_out = endpoint_out;
883 	ati_remote->udev = udev;
884 	ati_remote->rdev = rc_dev;
885 	ati_remote->interface = interface;
886 
887 	usb_make_path(udev, ati_remote->rc_phys, sizeof(ati_remote->rc_phys));
888 	strlcpy(ati_remote->mouse_phys, ati_remote->rc_phys,
889 		sizeof(ati_remote->mouse_phys));
890 
891 	strlcat(ati_remote->rc_phys, "/input0", sizeof(ati_remote->rc_phys));
892 	strlcat(ati_remote->mouse_phys, "/input1", sizeof(ati_remote->mouse_phys));
893 
894 	if (udev->manufacturer)
895 		strlcpy(ati_remote->rc_name, udev->manufacturer,
896 			sizeof(ati_remote->rc_name));
897 
898 	if (udev->product)
899 		snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
900 			 "%s %s", ati_remote->rc_name, udev->product);
901 
902 	if (!strlen(ati_remote->rc_name))
903 		snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
904 			DRIVER_DESC "(%04x,%04x)",
905 			le16_to_cpu(ati_remote->udev->descriptor.idVendor),
906 			le16_to_cpu(ati_remote->udev->descriptor.idProduct));
907 
908 	snprintf(ati_remote->mouse_name, sizeof(ati_remote->mouse_name),
909 		 "%s mouse", ati_remote->rc_name);
910 
911 	rc_dev->map_name = RC_MAP_ATI_X10; /* default map */
912 
913 	/* set default keymap according to receiver model */
914 	if (type) {
915 		if (type->default_keymap)
916 			rc_dev->map_name = type->default_keymap;
917 		else if (type->get_default_keymap)
918 			rc_dev->map_name = type->get_default_keymap(interface);
919 	}
920 
921 	ati_remote_rc_init(ati_remote);
922 	mutex_init(&ati_remote->open_mutex);
923 
924 	/* Device Hardware Initialization - fills in ati_remote->idev from udev. */
925 	err = ati_remote_initialize(ati_remote);
926 	if (err)
927 		goto exit_kill_urbs;
928 
929 	/* Set up and register rc device */
930 	err = rc_register_device(ati_remote->rdev);
931 	if (err)
932 		goto exit_kill_urbs;
933 
934 	/* use our delay for rc_dev */
935 	ati_remote->rdev->input_dev->rep[REP_DELAY] = repeat_delay;
936 
937 	/* Set up and register mouse input device */
938 	if (mouse) {
939 		input_dev = input_allocate_device();
940 		if (!input_dev) {
941 			err = -ENOMEM;
942 			goto exit_unregister_device;
943 		}
944 
945 		ati_remote->idev = input_dev;
946 		ati_remote_input_init(ati_remote);
947 		err = input_register_device(input_dev);
948 
949 		if (err)
950 			goto exit_free_input_device;
951 	}
952 
953 	usb_set_intfdata(interface, ati_remote);
954 	return 0;
955 
956  exit_free_input_device:
957 	input_free_device(input_dev);
958  exit_unregister_device:
959 	rc_unregister_device(rc_dev);
960 	rc_dev = NULL;
961  exit_kill_urbs:
962 	usb_kill_urb(ati_remote->irq_urb);
963 	usb_kill_urb(ati_remote->out_urb);
964  exit_free_buffers:
965 	ati_remote_free_buffers(ati_remote);
966  exit_free_dev_rdev:
967 	 rc_free_device(rc_dev);
968 	kfree(ati_remote);
969 	return err;
970 }
971 
972 /*
973  * ati_remote_disconnect
974  */
975 static void ati_remote_disconnect(struct usb_interface *interface)
976 {
977 	struct ati_remote *ati_remote;
978 
979 	ati_remote = usb_get_intfdata(interface);
980 	usb_set_intfdata(interface, NULL);
981 	if (!ati_remote) {
982 		dev_warn(&interface->dev, "%s - null device?\n", __func__);
983 		return;
984 	}
985 
986 	usb_kill_urb(ati_remote->irq_urb);
987 	usb_kill_urb(ati_remote->out_urb);
988 	if (ati_remote->idev)
989 		input_unregister_device(ati_remote->idev);
990 	rc_unregister_device(ati_remote->rdev);
991 	ati_remote_free_buffers(ati_remote);
992 	kfree(ati_remote);
993 }
994 
995 /* usb specific object to register with the usb subsystem */
996 static struct usb_driver ati_remote_driver = {
997 	.name         = "ati_remote",
998 	.probe        = ati_remote_probe,
999 	.disconnect   = ati_remote_disconnect,
1000 	.id_table     = ati_remote_table,
1001 };
1002 
1003 module_usb_driver(ati_remote_driver);
1004 
1005 MODULE_AUTHOR(DRIVER_AUTHOR);
1006 MODULE_DESCRIPTION(DRIVER_DESC);
1007 MODULE_LICENSE("GPL");
1008