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Linux/drivers/media/rc/ati_remote.c

  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 as EV_KEY */
283 #define KIND_FILTERED   2   /* Add artificial key-up events, drop keyrepeats */
284 #define KIND_ACCEL      3   /* Translate to EV_REL mouse-move events */
285 
286 /* Translation table from hardware messages to input events. */
287 static const struct {
288         unsigned char kind;
289         unsigned char data;     /* Raw key code from remote */
290         unsigned short code;    /* Input layer translation */
291 }  ati_remote_tbl[] = {
292         /* Directional control pad axes.  Code is xxyy */
293         {KIND_ACCEL,    0x70, 0xff00},  /* left */
294         {KIND_ACCEL,    0x71, 0x0100},  /* right */
295         {KIND_ACCEL,    0x72, 0x00ff},  /* up */
296         {KIND_ACCEL,    0x73, 0x0001},  /* down */
297 
298         /* Directional control pad diagonals */
299         {KIND_ACCEL,    0x74, 0xffff},  /* left up */
300         {KIND_ACCEL,    0x75, 0x01ff},  /* right up */
301         {KIND_ACCEL,    0x77, 0xff01},  /* left down */
302         {KIND_ACCEL,    0x76, 0x0101},  /* right down */
303 
304         /* "Mouse button" buttons.  The code below uses the fact that the
305          * lsbit of the raw code is a down/up indicator. */
306         {KIND_LITERAL,  0x78, BTN_LEFT}, /* left btn down */
307         {KIND_LITERAL,  0x79, BTN_LEFT}, /* left btn up */
308         {KIND_LITERAL,  0x7c, BTN_RIGHT},/* right btn down */
309         {KIND_LITERAL,  0x7d, BTN_RIGHT},/* right btn up */
310 
311         /* Artificial "doubleclick" events are generated by the hardware.
312          * They are mapped to the "side" and "extra" mouse buttons here. */
313         {KIND_FILTERED, 0x7a, BTN_SIDE}, /* left dblclick */
314         {KIND_FILTERED, 0x7e, BTN_EXTRA},/* right dblclick */
315 
316         /* Non-mouse events are handled by rc-core */
317         {KIND_END, 0x00, 0}
318 };
319 
320 /*
321  * ati_remote_dump_input
322  */
323 static void ati_remote_dump(struct device *dev, unsigned char *data,
324                             unsigned int len)
325 {
326         if (len == 1) {
327                 if (data[0] != (unsigned char)0xff && data[0] != 0x00)
328                         dev_warn(dev, "Weird byte 0x%02x\n", data[0]);
329         } else if (len == 4)
330                 dev_warn(dev, "Weird key %*ph\n", 4, data);
331         else
332                 dev_warn(dev, "Weird data, len=%d %*ph ...\n", len, 6, data);
333 }
334 
335 /*
336  * ati_remote_open
337  */
338 static int ati_remote_open(struct ati_remote *ati_remote)
339 {
340         int err = 0;
341 
342         mutex_lock(&ati_remote->open_mutex);
343 
344         if (ati_remote->users++ != 0)
345                 goto out; /* one was already active */
346 
347         /* On first open, submit the read urb which was set up previously. */
348         ati_remote->irq_urb->dev = ati_remote->udev;
349         if (usb_submit_urb(ati_remote->irq_urb, GFP_KERNEL)) {
350                 dev_err(&ati_remote->interface->dev,
351                         "%s: usb_submit_urb failed!\n", __func__);
352                 err = -EIO;
353         }
354 
355 out:    mutex_unlock(&ati_remote->open_mutex);
356         return err;
357 }
358 
359 /*
360  * ati_remote_close
361  */
362 static void ati_remote_close(struct ati_remote *ati_remote)
363 {
364         mutex_lock(&ati_remote->open_mutex);
365         if (--ati_remote->users == 0)
366                 usb_kill_urb(ati_remote->irq_urb);
367         mutex_unlock(&ati_remote->open_mutex);
368 }
369 
370 static int ati_remote_input_open(struct input_dev *inputdev)
371 {
372         struct ati_remote *ati_remote = input_get_drvdata(inputdev);
373         return ati_remote_open(ati_remote);
374 }
375 
376 static void ati_remote_input_close(struct input_dev *inputdev)
377 {
378         struct ati_remote *ati_remote = input_get_drvdata(inputdev);
379         ati_remote_close(ati_remote);
380 }
381 
382 static int ati_remote_rc_open(struct rc_dev *rdev)
383 {
384         struct ati_remote *ati_remote = rdev->priv;
385         return ati_remote_open(ati_remote);
386 }
387 
388 static void ati_remote_rc_close(struct rc_dev *rdev)
389 {
390         struct ati_remote *ati_remote = rdev->priv;
391         ati_remote_close(ati_remote);
392 }
393 
394 /*
395  * ati_remote_irq_out
396  */
397 static void ati_remote_irq_out(struct urb *urb)
398 {
399         struct ati_remote *ati_remote = urb->context;
400 
401         if (urb->status) {
402                 dev_dbg(&ati_remote->interface->dev, "%s: status %d\n",
403                         __func__, urb->status);
404                 return;
405         }
406 
407         ati_remote->send_flags |= SEND_FLAG_COMPLETE;
408         wmb();
409         wake_up(&ati_remote->wait);
410 }
411 
412 /*
413  * ati_remote_sendpacket
414  *
415  * Used to send device initialization strings
416  */
417 static int ati_remote_sendpacket(struct ati_remote *ati_remote, u16 cmd,
418         unsigned char *data)
419 {
420         int retval = 0;
421 
422         /* Set up out_urb */
423         memcpy(ati_remote->out_urb->transfer_buffer + 1, data, LO(cmd));
424         ((char *) ati_remote->out_urb->transfer_buffer)[0] = HI(cmd);
425 
426         ati_remote->out_urb->transfer_buffer_length = LO(cmd) + 1;
427         ati_remote->out_urb->dev = ati_remote->udev;
428         ati_remote->send_flags = SEND_FLAG_IN_PROGRESS;
429 
430         retval = usb_submit_urb(ati_remote->out_urb, GFP_ATOMIC);
431         if (retval) {
432                 dev_dbg(&ati_remote->interface->dev,
433                          "sendpacket: usb_submit_urb failed: %d\n", retval);
434                 return retval;
435         }
436 
437         wait_event_timeout(ati_remote->wait,
438                 ((ati_remote->out_urb->status != -EINPROGRESS) ||
439                         (ati_remote->send_flags & SEND_FLAG_COMPLETE)),
440                 HZ);
441         usb_kill_urb(ati_remote->out_urb);
442 
443         return retval;
444 }
445 
446 struct accel_times {
447         const char      value;
448         unsigned int    msecs;
449 };
450 
451 static const struct accel_times accel[] = {
452         {  1,  125 },
453         {  2,  250 },
454         {  4,  500 },
455         {  6, 1000 },
456         {  9, 1500 },
457         { 13, 2000 },
458         { 20,    0 },
459 };
460 
461 /*
462  * ati_remote_compute_accel
463  *
464  * Implements acceleration curve for directional control pad
465  * If elapsed time since last event is > 1/4 second, user "stopped",
466  * so reset acceleration. Otherwise, user is probably holding the control
467  * pad down, so we increase acceleration, ramping up over two seconds to
468  * a maximum speed.
469  */
470 static int ati_remote_compute_accel(struct ati_remote *ati_remote)
471 {
472         unsigned long now = jiffies, reset_time;
473         int i;
474 
475         reset_time = msecs_to_jiffies(250);
476 
477         if (time_after(now, ati_remote->old_jiffies + reset_time)) {
478                 ati_remote->acc_jiffies = now;
479                 return 1;
480         }
481         for (i = 0; i < ARRAY_SIZE(accel) - 1; i++) {
482                 unsigned long timeout = msecs_to_jiffies(accel[i].msecs);
483 
484                 if (time_before(now, ati_remote->acc_jiffies + timeout))
485                         return accel[i].value;
486         }
487         return accel[i].value;
488 }
489 
490 /*
491  * ati_remote_report_input
492  */
493 static void ati_remote_input_report(struct urb *urb)
494 {
495         struct ati_remote *ati_remote = urb->context;
496         unsigned char *data= ati_remote->inbuf;
497         struct input_dev *dev = ati_remote->idev;
498         int index = -1;
499         int remote_num;
500         unsigned char scancode;
501         u32 wheel_keycode = KEY_RESERVED;
502         int i;
503 
504         /*
505          * data[0] = 0x14
506          * data[1] = data[2] + data[3] + 0xd5 (a checksum byte)
507          * data[2] = the key code (with toggle bit in MSB with some models)
508          * data[3] = channel << 4 (the low 4 bits must be zero)
509          */
510 
511         /* Deal with strange looking inputs */
512         if ( urb->actual_length != 4 || data[0] != 0x14 ||
513              data[1] != (unsigned char)(data[2] + data[3] + 0xD5) ||
514              (data[3] & 0x0f) != 0x00) {
515                 ati_remote_dump(&urb->dev->dev, data, urb->actual_length);
516                 return;
517         }
518 
519         if (data[1] != ((data[2] + data[3] + 0xd5) & 0xff)) {
520                 dbginfo(&ati_remote->interface->dev,
521                         "wrong checksum in input: %*ph\n", 4, data);
522                 return;
523         }
524 
525         /* Mask unwanted remote channels.  */
526         /* note: remote_num is 0-based, channel 1 on remote == 0 here */
527         remote_num = (data[3] >> 4) & 0x0f;
528         if (channel_mask & (1 << (remote_num + 1))) {
529                 dbginfo(&ati_remote->interface->dev,
530                         "Masked input from channel 0x%02x: data %02x, mask= 0x%02lx\n",
531                         remote_num, data[2], channel_mask);
532                 return;
533         }
534 
535         /*
536          * MSB is a toggle code, though only used by some devices
537          * (e.g. SnapStream Firefly)
538          */
539         scancode = data[2] & 0x7f;
540 
541         dbginfo(&ati_remote->interface->dev,
542                 "channel 0x%02x; key data %02x, scancode %02x\n",
543                 remote_num, data[2], scancode);
544 
545         if (scancode >= 0x70) {
546                 /*
547                  * This is either a mouse or scrollwheel event, depending on
548                  * the remote/keymap.
549                  * Get the keycode assigned to scancode 0x78/0x70. If it is
550                  * set, assume this is a scrollwheel up/down event.
551                  */
552                 wheel_keycode = rc_g_keycode_from_table(ati_remote->rdev,
553                                                         scancode & 0x78);
554 
555                 if (wheel_keycode == KEY_RESERVED) {
556                         /* scrollwheel was not mapped, assume mouse */
557 
558                         /* Look up event code index in the mouse translation
559                          * table.
560                          */
561                         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++) {
562                                 if (scancode == ati_remote_tbl[i].data) {
563                                         index = i;
564                                         break;
565                                 }
566                         }
567                 }
568         }
569 
570         if (index >= 0 && ati_remote_tbl[index].kind == KIND_LITERAL) {
571                 /*
572                  * The lsbit of the raw key code is a down/up flag.
573                  * Invert it to match the input layer's conventions.
574                  */
575                 input_event(dev, EV_KEY, ati_remote_tbl[index].code,
576                         !(data[2] & 1));
577 
578                 ati_remote->old_jiffies = jiffies;
579 
580         } else if (index < 0 || ati_remote_tbl[index].kind == KIND_FILTERED) {
581                 unsigned long now = jiffies;
582 
583                 /* Filter duplicate events which happen "too close" together. */
584                 if (ati_remote->old_data == data[2] &&
585                     time_before(now, ati_remote->old_jiffies +
586                                      msecs_to_jiffies(repeat_filter))) {
587                         ati_remote->repeat_count++;
588                 } else {
589                         ati_remote->repeat_count = 0;
590                         ati_remote->first_jiffies = now;
591                 }
592 
593                 ati_remote->old_jiffies = now;
594 
595                 /* Ensure we skip at least the 4 first duplicate events
596                  * (generated by a single keypress), and continue skipping
597                  * until repeat_delay msecs have passed.
598                  */
599                 if (ati_remote->repeat_count > 0 &&
600                     (ati_remote->repeat_count < 5 ||
601                      time_before(now, ati_remote->first_jiffies +
602                                       msecs_to_jiffies(repeat_delay))))
603                         return;
604 
605                 if (index >= 0) {
606                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 1);
607                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 0);
608                 } else {
609                         /* Not a mouse event, hand it to rc-core. */
610                         int count = 1;
611 
612                         if (wheel_keycode != KEY_RESERVED) {
613                                 /*
614                                  * This is a scrollwheel event, send the
615                                  * scroll up (0x78) / down (0x70) scancode
616                                  * repeatedly as many times as indicated by
617                                  * rest of the scancode.
618                                  */
619                                 count = (scancode & 0x07) + 1;
620                                 scancode &= 0x78;
621                         }
622 
623                         while (count--) {
624                                 /*
625                                 * We don't use the rc-core repeat handling yet as
626                                 * it would cause ghost repeats which would be a
627                                 * regression for this driver.
628                                 */
629                                 rc_keydown_notimeout(ati_remote->rdev, RC_TYPE_OTHER,
630                                                      scancode, data[2]);
631                                 rc_keyup(ati_remote->rdev);
632                         }
633                         goto nosync;
634                 }
635 
636         } else if (ati_remote_tbl[index].kind == KIND_ACCEL) {
637                 signed char dx = ati_remote_tbl[index].code >> 8;
638                 signed char dy = ati_remote_tbl[index].code & 255;
639 
640                 /*
641                  * Other event kinds are from the directional control pad, and
642                  * have an acceleration factor applied to them.  Without this
643                  * acceleration, the control pad is mostly unusable.
644                  */
645                 int acc = ati_remote_compute_accel(ati_remote);
646                 if (dx)
647                         input_report_rel(dev, REL_X, dx * acc);
648                 if (dy)
649                         input_report_rel(dev, REL_Y, dy * acc);
650                 ati_remote->old_jiffies = jiffies;
651 
652         } else {
653                 dev_dbg(&ati_remote->interface->dev, "ati_remote kind=%d\n",
654                         ati_remote_tbl[index].kind);
655                 return;
656         }
657         input_sync(dev);
658 nosync:
659         ati_remote->old_data = data[2];
660 }
661 
662 /*
663  * ati_remote_irq_in
664  */
665 static void ati_remote_irq_in(struct urb *urb)
666 {
667         struct ati_remote *ati_remote = urb->context;
668         int retval;
669 
670         switch (urb->status) {
671         case 0:                 /* success */
672                 ati_remote_input_report(urb);
673                 break;
674         case -ECONNRESET:       /* unlink */
675         case -ENOENT:
676         case -ESHUTDOWN:
677                 dev_dbg(&ati_remote->interface->dev,
678                         "%s: urb error status, unlink?\n",
679                         __func__);
680                 return;
681         default:                /* error */
682                 dev_dbg(&ati_remote->interface->dev,
683                         "%s: Nonzero urb status %d\n",
684                         __func__, urb->status);
685         }
686 
687         retval = usb_submit_urb(urb, GFP_ATOMIC);
688         if (retval)
689                 dev_err(&ati_remote->interface->dev,
690                         "%s: usb_submit_urb()=%d\n",
691                         __func__, retval);
692 }
693 
694 /*
695  * ati_remote_alloc_buffers
696  */
697 static int ati_remote_alloc_buffers(struct usb_device *udev,
698                                     struct ati_remote *ati_remote)
699 {
700         ati_remote->inbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
701                                                &ati_remote->inbuf_dma);
702         if (!ati_remote->inbuf)
703                 return -1;
704 
705         ati_remote->outbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
706                                                 &ati_remote->outbuf_dma);
707         if (!ati_remote->outbuf)
708                 return -1;
709 
710         ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
711         if (!ati_remote->irq_urb)
712                 return -1;
713 
714         ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
715         if (!ati_remote->out_urb)
716                 return -1;
717 
718         return 0;
719 }
720 
721 /*
722  * ati_remote_free_buffers
723  */
724 static void ati_remote_free_buffers(struct ati_remote *ati_remote)
725 {
726         usb_free_urb(ati_remote->irq_urb);
727         usb_free_urb(ati_remote->out_urb);
728 
729         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
730                 ati_remote->inbuf, ati_remote->inbuf_dma);
731 
732         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
733                 ati_remote->outbuf, ati_remote->outbuf_dma);
734 }
735 
736 static void ati_remote_input_init(struct ati_remote *ati_remote)
737 {
738         struct input_dev *idev = ati_remote->idev;
739         int i;
740 
741         idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
742         idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
743                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
744         idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
745         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++)
746                 if (ati_remote_tbl[i].kind == KIND_LITERAL ||
747                     ati_remote_tbl[i].kind == KIND_FILTERED)
748                         __set_bit(ati_remote_tbl[i].code, idev->keybit);
749 
750         input_set_drvdata(idev, ati_remote);
751 
752         idev->open = ati_remote_input_open;
753         idev->close = ati_remote_input_close;
754 
755         idev->name = ati_remote->mouse_name;
756         idev->phys = ati_remote->mouse_phys;
757 
758         usb_to_input_id(ati_remote->udev, &idev->id);
759         idev->dev.parent = &ati_remote->interface->dev;
760 }
761 
762 static void ati_remote_rc_init(struct ati_remote *ati_remote)
763 {
764         struct rc_dev *rdev = ati_remote->rdev;
765 
766         rdev->priv = ati_remote;
767         rdev->driver_type = RC_DRIVER_SCANCODE;
768         rdev->allowed_protocols = RC_BIT_OTHER;
769         rdev->driver_name = "ati_remote";
770 
771         rdev->open = ati_remote_rc_open;
772         rdev->close = ati_remote_rc_close;
773 
774         rdev->input_name = ati_remote->rc_name;
775         rdev->input_phys = ati_remote->rc_phys;
776 
777         usb_to_input_id(ati_remote->udev, &rdev->input_id);
778         rdev->dev.parent = &ati_remote->interface->dev;
779 }
780 
781 static int ati_remote_initialize(struct ati_remote *ati_remote)
782 {
783         struct usb_device *udev = ati_remote->udev;
784         int pipe, maxp;
785 
786         init_waitqueue_head(&ati_remote->wait);
787 
788         /* Set up irq_urb */
789         pipe = usb_rcvintpipe(udev, ati_remote->endpoint_in->bEndpointAddress);
790         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
791         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
792 
793         usb_fill_int_urb(ati_remote->irq_urb, udev, pipe, ati_remote->inbuf,
794                          maxp, ati_remote_irq_in, ati_remote,
795                          ati_remote->endpoint_in->bInterval);
796         ati_remote->irq_urb->transfer_dma = ati_remote->inbuf_dma;
797         ati_remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
798 
799         /* Set up out_urb */
800         pipe = usb_sndintpipe(udev, ati_remote->endpoint_out->bEndpointAddress);
801         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
802         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
803 
804         usb_fill_int_urb(ati_remote->out_urb, udev, pipe, ati_remote->outbuf,
805                          maxp, ati_remote_irq_out, ati_remote,
806                          ati_remote->endpoint_out->bInterval);
807         ati_remote->out_urb->transfer_dma = ati_remote->outbuf_dma;
808         ati_remote->out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
809 
810         /* send initialization strings */
811         if ((ati_remote_sendpacket(ati_remote, 0x8004, init1)) ||
812             (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
813                 dev_err(&ati_remote->interface->dev,
814                          "Initializing ati_remote hardware failed.\n");
815                 return -EIO;
816         }
817 
818         return 0;
819 }
820 
821 /*
822  * ati_remote_probe
823  */
824 static int ati_remote_probe(struct usb_interface *interface,
825         const struct usb_device_id *id)
826 {
827         struct usb_device *udev = interface_to_usbdev(interface);
828         struct usb_host_interface *iface_host = interface->cur_altsetting;
829         struct usb_endpoint_descriptor *endpoint_in, *endpoint_out;
830         struct ati_receiver_type *type = (struct ati_receiver_type *)id->driver_info;
831         struct ati_remote *ati_remote;
832         struct input_dev *input_dev;
833         struct rc_dev *rc_dev;
834         int err = -ENOMEM;
835 
836         if (iface_host->desc.bNumEndpoints != 2) {
837                 err("%s: Unexpected desc.bNumEndpoints\n", __func__);
838                 return -ENODEV;
839         }
840 
841         endpoint_in = &iface_host->endpoint[0].desc;
842         endpoint_out = &iface_host->endpoint[1].desc;
843 
844         if (!usb_endpoint_is_int_in(endpoint_in)) {
845                 err("%s: Unexpected endpoint_in\n", __func__);
846                 return -ENODEV;
847         }
848         if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
849                 err("%s: endpoint_in message size==0? \n", __func__);
850                 return -ENODEV;
851         }
852 
853         ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
854         rc_dev = rc_allocate_device();
855         if (!ati_remote || !rc_dev)
856                 goto exit_free_dev_rdev;
857 
858         /* Allocate URB buffers, URBs */
859         if (ati_remote_alloc_buffers(udev, ati_remote))
860                 goto exit_free_buffers;
861 
862         ati_remote->endpoint_in = endpoint_in;
863         ati_remote->endpoint_out = endpoint_out;
864         ati_remote->udev = udev;
865         ati_remote->rdev = rc_dev;
866         ati_remote->interface = interface;
867 
868         usb_make_path(udev, ati_remote->rc_phys, sizeof(ati_remote->rc_phys));
869         strlcpy(ati_remote->mouse_phys, ati_remote->rc_phys,
870                 sizeof(ati_remote->mouse_phys));
871 
872         strlcat(ati_remote->rc_phys, "/input0", sizeof(ati_remote->rc_phys));
873         strlcat(ati_remote->mouse_phys, "/input1", sizeof(ati_remote->mouse_phys));
874 
875         snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name), "%s%s%s",
876                 udev->manufacturer ?: "",
877                 udev->manufacturer && udev->product ? " " : "",
878                 udev->product ?: "");
879 
880         if (!strlen(ati_remote->rc_name))
881                 snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
882                         DRIVER_DESC "(%04x,%04x)",
883                         le16_to_cpu(ati_remote->udev->descriptor.idVendor),
884                         le16_to_cpu(ati_remote->udev->descriptor.idProduct));
885 
886         snprintf(ati_remote->mouse_name, sizeof(ati_remote->mouse_name),
887                  "%s mouse", ati_remote->rc_name);
888 
889         rc_dev->map_name = RC_MAP_ATI_X10; /* default map */
890 
891         /* set default keymap according to receiver model */
892         if (type) {
893                 if (type->default_keymap)
894                         rc_dev->map_name = type->default_keymap;
895                 else if (type->get_default_keymap)
896                         rc_dev->map_name = type->get_default_keymap(interface);
897         }
898 
899         ati_remote_rc_init(ati_remote);
900         mutex_init(&ati_remote->open_mutex);
901 
902         /* Device Hardware Initialization - fills in ati_remote->idev from udev. */
903         err = ati_remote_initialize(ati_remote);
904         if (err)
905                 goto exit_kill_urbs;
906 
907         /* Set up and register rc device */
908         err = rc_register_device(ati_remote->rdev);
909         if (err)
910                 goto exit_kill_urbs;
911 
912         /* use our delay for rc_dev */
913         ati_remote->rdev->input_dev->rep[REP_DELAY] = repeat_delay;
914 
915         /* Set up and register mouse input device */
916         if (mouse) {
917                 input_dev = input_allocate_device();
918                 if (!input_dev) {
919                         err = -ENOMEM;
920                         goto exit_unregister_device;
921                 }
922 
923                 ati_remote->idev = input_dev;
924                 ati_remote_input_init(ati_remote);
925                 err = input_register_device(input_dev);
926 
927                 if (err)
928                         goto exit_free_input_device;
929         }
930 
931         usb_set_intfdata(interface, ati_remote);
932         return 0;
933 
934  exit_free_input_device:
935         input_free_device(input_dev);
936  exit_unregister_device:
937         rc_unregister_device(rc_dev);
938         rc_dev = NULL;
939  exit_kill_urbs:
940         usb_kill_urb(ati_remote->irq_urb);
941         usb_kill_urb(ati_remote->out_urb);
942  exit_free_buffers:
943         ati_remote_free_buffers(ati_remote);
944  exit_free_dev_rdev:
945          rc_free_device(rc_dev);
946         kfree(ati_remote);
947         return err;
948 }
949 
950 /*
951  * ati_remote_disconnect
952  */
953 static void ati_remote_disconnect(struct usb_interface *interface)
954 {
955         struct ati_remote *ati_remote;
956 
957         ati_remote = usb_get_intfdata(interface);
958         usb_set_intfdata(interface, NULL);
959         if (!ati_remote) {
960                 dev_warn(&interface->dev, "%s - null device?\n", __func__);
961                 return;
962         }
963 
964         usb_kill_urb(ati_remote->irq_urb);
965         usb_kill_urb(ati_remote->out_urb);
966         if (ati_remote->idev)
967                 input_unregister_device(ati_remote->idev);
968         rc_unregister_device(ati_remote->rdev);
969         ati_remote_free_buffers(ati_remote);
970         kfree(ati_remote);
971 }
972 
973 /* usb specific object to register with the usb subsystem */
974 static struct usb_driver ati_remote_driver = {
975         .name         = "ati_remote",
976         .probe        = ati_remote_probe,
977         .disconnect   = ati_remote_disconnect,
978         .id_table     = ati_remote_table,
979 };
980 
981 module_usb_driver(ati_remote_driver);
982 
983 MODULE_AUTHOR(DRIVER_AUTHOR);
984 MODULE_DESCRIPTION(DRIVER_DESC);
985 MODULE_LICENSE("GPL");
986 

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