Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

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 /*
447  * ati_remote_compute_accel
448  *
449  * Implements acceleration curve for directional control pad
450  * If elapsed time since last event is > 1/4 second, user "stopped",
451  * so reset acceleration. Otherwise, user is probably holding the control
452  * pad down, so we increase acceleration, ramping up over two seconds to
453  * a maximum speed.
454  */
455 static int ati_remote_compute_accel(struct ati_remote *ati_remote)
456 {
457         static const char accel[] = { 1, 2, 4, 6, 9, 13, 20 };
458         unsigned long now = jiffies;
459         int acc;
460 
461         if (time_after(now, ati_remote->old_jiffies + msecs_to_jiffies(250))) {
462                 acc = 1;
463                 ati_remote->acc_jiffies = now;
464         }
465         else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(125)))
466                 acc = accel[0];
467         else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(250)))
468                 acc = accel[1];
469         else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(500)))
470                 acc = accel[2];
471         else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(1000)))
472                 acc = accel[3];
473         else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(1500)))
474                 acc = accel[4];
475         else if (time_before(now, ati_remote->acc_jiffies + msecs_to_jiffies(2000)))
476                 acc = accel[5];
477         else
478                 acc = accel[6];
479 
480         return acc;
481 }
482 
483 /*
484  * ati_remote_report_input
485  */
486 static void ati_remote_input_report(struct urb *urb)
487 {
488         struct ati_remote *ati_remote = urb->context;
489         unsigned char *data= ati_remote->inbuf;
490         struct input_dev *dev = ati_remote->idev;
491         int index = -1;
492         int remote_num;
493         unsigned char scancode;
494         u32 wheel_keycode = KEY_RESERVED;
495         int i;
496 
497         /*
498          * data[0] = 0x14
499          * data[1] = data[2] + data[3] + 0xd5 (a checksum byte)
500          * data[2] = the key code (with toggle bit in MSB with some models)
501          * data[3] = channel << 4 (the low 4 bits must be zero)
502          */
503 
504         /* Deal with strange looking inputs */
505         if ( urb->actual_length != 4 || data[0] != 0x14 ||
506              data[1] != (unsigned char)(data[2] + data[3] + 0xD5) ||
507              (data[3] & 0x0f) != 0x00) {
508                 ati_remote_dump(&urb->dev->dev, data, urb->actual_length);
509                 return;
510         }
511 
512         if (data[1] != ((data[2] + data[3] + 0xd5) & 0xff)) {
513                 dbginfo(&ati_remote->interface->dev,
514                         "wrong checksum in input: %*ph\n", 4, data);
515                 return;
516         }
517 
518         /* Mask unwanted remote channels.  */
519         /* note: remote_num is 0-based, channel 1 on remote == 0 here */
520         remote_num = (data[3] >> 4) & 0x0f;
521         if (channel_mask & (1 << (remote_num + 1))) {
522                 dbginfo(&ati_remote->interface->dev,
523                         "Masked input from channel 0x%02x: data %02x, "
524                         "mask= 0x%02lx\n",
525                         remote_num, data[2], channel_mask);
526                 return;
527         }
528 
529         /*
530          * MSB is a toggle code, though only used by some devices
531          * (e.g. SnapStream Firefly)
532          */
533         scancode = data[2] & 0x7f;
534 
535         dbginfo(&ati_remote->interface->dev,
536                 "channel 0x%02x; key data %02x, scancode %02x\n",
537                 remote_num, data[2], scancode);
538 
539         if (scancode >= 0x70) {
540                 /*
541                  * This is either a mouse or scrollwheel event, depending on
542                  * the remote/keymap.
543                  * Get the keycode assigned to scancode 0x78/0x70. If it is
544                  * set, assume this is a scrollwheel up/down event.
545                  */
546                 wheel_keycode = rc_g_keycode_from_table(ati_remote->rdev,
547                                                         scancode & 0x78);
548 
549                 if (wheel_keycode == KEY_RESERVED) {
550                         /* scrollwheel was not mapped, assume mouse */
551 
552                         /* Look up event code index in the mouse translation
553                          * table.
554                          */
555                         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++) {
556                                 if (scancode == ati_remote_tbl[i].data) {
557                                         index = i;
558                                         break;
559                                 }
560                         }
561                 }
562         }
563 
564         if (index >= 0 && ati_remote_tbl[index].kind == KIND_LITERAL) {
565                 /*
566                  * The lsbit of the raw key code is a down/up flag.
567                  * Invert it to match the input layer's conventions.
568                  */
569                 input_event(dev, EV_KEY, ati_remote_tbl[index].code,
570                         !(data[2] & 1));
571 
572                 ati_remote->old_jiffies = jiffies;
573 
574         } else if (index < 0 || ati_remote_tbl[index].kind == KIND_FILTERED) {
575                 unsigned long now = jiffies;
576 
577                 /* Filter duplicate events which happen "too close" together. */
578                 if (ati_remote->old_data == data[2] &&
579                     time_before(now, ati_remote->old_jiffies +
580                                      msecs_to_jiffies(repeat_filter))) {
581                         ati_remote->repeat_count++;
582                 } else {
583                         ati_remote->repeat_count = 0;
584                         ati_remote->first_jiffies = now;
585                 }
586 
587                 ati_remote->old_jiffies = now;
588 
589                 /* Ensure we skip at least the 4 first duplicate events
590                  * (generated by a single keypress), and continue skipping
591                  * until repeat_delay msecs have passed.
592                  */
593                 if (ati_remote->repeat_count > 0 &&
594                     (ati_remote->repeat_count < 5 ||
595                      time_before(now, ati_remote->first_jiffies +
596                                       msecs_to_jiffies(repeat_delay))))
597                         return;
598 
599                 if (index >= 0) {
600                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 1);
601                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 0);
602                 } else {
603                         /* Not a mouse event, hand it to rc-core. */
604                         int count = 1;
605 
606                         if (wheel_keycode != KEY_RESERVED) {
607                                 /*
608                                  * This is a scrollwheel event, send the
609                                  * scroll up (0x78) / down (0x70) scancode
610                                  * repeatedly as many times as indicated by
611                                  * rest of the scancode.
612                                  */
613                                 count = (scancode & 0x07) + 1;
614                                 scancode &= 0x78;
615                         }
616 
617                         while (count--) {
618                                 /*
619                                 * We don't use the rc-core repeat handling yet as
620                                 * it would cause ghost repeats which would be a
621                                 * regression for this driver.
622                                 */
623                                 rc_keydown_notimeout(ati_remote->rdev, RC_TYPE_OTHER,
624                                                      scancode, data[2]);
625                                 rc_keyup(ati_remote->rdev);
626                         }
627                         goto nosync;
628                 }
629 
630         } else if (ati_remote_tbl[index].kind == KIND_ACCEL) {
631                 signed char dx = ati_remote_tbl[index].code >> 8;
632                 signed char dy = ati_remote_tbl[index].code & 255;
633 
634                 /*
635                  * Other event kinds are from the directional control pad, and
636                  * have an acceleration factor applied to them.  Without this
637                  * acceleration, the control pad is mostly unusable.
638                  */
639                 int acc = ati_remote_compute_accel(ati_remote);
640                 if (dx)
641                         input_report_rel(dev, REL_X, dx * acc);
642                 if (dy)
643                         input_report_rel(dev, REL_Y, dy * acc);
644                 ati_remote->old_jiffies = jiffies;
645 
646         } else {
647                 dev_dbg(&ati_remote->interface->dev, "ati_remote kind=%d\n",
648                         ati_remote_tbl[index].kind);
649                 return;
650         }
651         input_sync(dev);
652 nosync:
653         ati_remote->old_data = data[2];
654 }
655 
656 /*
657  * ati_remote_irq_in
658  */
659 static void ati_remote_irq_in(struct urb *urb)
660 {
661         struct ati_remote *ati_remote = urb->context;
662         int retval;
663 
664         switch (urb->status) {
665         case 0:                 /* success */
666                 ati_remote_input_report(urb);
667                 break;
668         case -ECONNRESET:       /* unlink */
669         case -ENOENT:
670         case -ESHUTDOWN:
671                 dev_dbg(&ati_remote->interface->dev,
672                         "%s: urb error status, unlink?\n",
673                         __func__);
674                 return;
675         default:                /* error */
676                 dev_dbg(&ati_remote->interface->dev,
677                         "%s: Nonzero urb status %d\n",
678                         __func__, urb->status);
679         }
680 
681         retval = usb_submit_urb(urb, GFP_ATOMIC);
682         if (retval)
683                 dev_err(&ati_remote->interface->dev,
684                         "%s: usb_submit_urb()=%d\n",
685                         __func__, retval);
686 }
687 
688 /*
689  * ati_remote_alloc_buffers
690  */
691 static int ati_remote_alloc_buffers(struct usb_device *udev,
692                                     struct ati_remote *ati_remote)
693 {
694         ati_remote->inbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
695                                                &ati_remote->inbuf_dma);
696         if (!ati_remote->inbuf)
697                 return -1;
698 
699         ati_remote->outbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
700                                                 &ati_remote->outbuf_dma);
701         if (!ati_remote->outbuf)
702                 return -1;
703 
704         ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
705         if (!ati_remote->irq_urb)
706                 return -1;
707 
708         ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
709         if (!ati_remote->out_urb)
710                 return -1;
711 
712         return 0;
713 }
714 
715 /*
716  * ati_remote_free_buffers
717  */
718 static void ati_remote_free_buffers(struct ati_remote *ati_remote)
719 {
720         usb_free_urb(ati_remote->irq_urb);
721         usb_free_urb(ati_remote->out_urb);
722 
723         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
724                 ati_remote->inbuf, ati_remote->inbuf_dma);
725 
726         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
727                 ati_remote->outbuf, ati_remote->outbuf_dma);
728 }
729 
730 static void ati_remote_input_init(struct ati_remote *ati_remote)
731 {
732         struct input_dev *idev = ati_remote->idev;
733         int i;
734 
735         idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
736         idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
737                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
738         idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
739         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++)
740                 if (ati_remote_tbl[i].kind == KIND_LITERAL ||
741                     ati_remote_tbl[i].kind == KIND_FILTERED)
742                         __set_bit(ati_remote_tbl[i].code, idev->keybit);
743 
744         input_set_drvdata(idev, ati_remote);
745 
746         idev->open = ati_remote_input_open;
747         idev->close = ati_remote_input_close;
748 
749         idev->name = ati_remote->mouse_name;
750         idev->phys = ati_remote->mouse_phys;
751 
752         usb_to_input_id(ati_remote->udev, &idev->id);
753         idev->dev.parent = &ati_remote->interface->dev;
754 }
755 
756 static void ati_remote_rc_init(struct ati_remote *ati_remote)
757 {
758         struct rc_dev *rdev = ati_remote->rdev;
759 
760         rdev->priv = ati_remote;
761         rdev->driver_type = RC_DRIVER_SCANCODE;
762         rdev->allowed_protocols = RC_BIT_OTHER;
763         rdev->driver_name = "ati_remote";
764 
765         rdev->open = ati_remote_rc_open;
766         rdev->close = ati_remote_rc_close;
767 
768         rdev->input_name = ati_remote->rc_name;
769         rdev->input_phys = ati_remote->rc_phys;
770 
771         usb_to_input_id(ati_remote->udev, &rdev->input_id);
772         rdev->dev.parent = &ati_remote->interface->dev;
773 }
774 
775 static int ati_remote_initialize(struct ati_remote *ati_remote)
776 {
777         struct usb_device *udev = ati_remote->udev;
778         int pipe, maxp;
779 
780         init_waitqueue_head(&ati_remote->wait);
781 
782         /* Set up irq_urb */
783         pipe = usb_rcvintpipe(udev, ati_remote->endpoint_in->bEndpointAddress);
784         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
785         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
786 
787         usb_fill_int_urb(ati_remote->irq_urb, udev, pipe, ati_remote->inbuf,
788                          maxp, ati_remote_irq_in, ati_remote,
789                          ati_remote->endpoint_in->bInterval);
790         ati_remote->irq_urb->transfer_dma = ati_remote->inbuf_dma;
791         ati_remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
792 
793         /* Set up out_urb */
794         pipe = usb_sndintpipe(udev, ati_remote->endpoint_out->bEndpointAddress);
795         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
796         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
797 
798         usb_fill_int_urb(ati_remote->out_urb, udev, pipe, ati_remote->outbuf,
799                          maxp, ati_remote_irq_out, ati_remote,
800                          ati_remote->endpoint_out->bInterval);
801         ati_remote->out_urb->transfer_dma = ati_remote->outbuf_dma;
802         ati_remote->out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
803 
804         /* send initialization strings */
805         if ((ati_remote_sendpacket(ati_remote, 0x8004, init1)) ||
806             (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
807                 dev_err(&ati_remote->interface->dev,
808                          "Initializing ati_remote hardware failed.\n");
809                 return -EIO;
810         }
811 
812         return 0;
813 }
814 
815 /*
816  * ati_remote_probe
817  */
818 static int ati_remote_probe(struct usb_interface *interface,
819         const struct usb_device_id *id)
820 {
821         struct usb_device *udev = interface_to_usbdev(interface);
822         struct usb_host_interface *iface_host = interface->cur_altsetting;
823         struct usb_endpoint_descriptor *endpoint_in, *endpoint_out;
824         struct ati_receiver_type *type = (struct ati_receiver_type *)id->driver_info;
825         struct ati_remote *ati_remote;
826         struct input_dev *input_dev;
827         struct rc_dev *rc_dev;
828         int err = -ENOMEM;
829 
830         if (iface_host->desc.bNumEndpoints != 2) {
831                 err("%s: Unexpected desc.bNumEndpoints\n", __func__);
832                 return -ENODEV;
833         }
834 
835         endpoint_in = &iface_host->endpoint[0].desc;
836         endpoint_out = &iface_host->endpoint[1].desc;
837 
838         if (!usb_endpoint_is_int_in(endpoint_in)) {
839                 err("%s: Unexpected endpoint_in\n", __func__);
840                 return -ENODEV;
841         }
842         if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
843                 err("%s: endpoint_in message size==0? \n", __func__);
844                 return -ENODEV;
845         }
846 
847         ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
848         rc_dev = rc_allocate_device();
849         if (!ati_remote || !rc_dev)
850                 goto exit_free_dev_rdev;
851 
852         /* Allocate URB buffers, URBs */
853         if (ati_remote_alloc_buffers(udev, ati_remote))
854                 goto exit_free_buffers;
855 
856         ati_remote->endpoint_in = endpoint_in;
857         ati_remote->endpoint_out = endpoint_out;
858         ati_remote->udev = udev;
859         ati_remote->rdev = rc_dev;
860         ati_remote->interface = interface;
861 
862         usb_make_path(udev, ati_remote->rc_phys, sizeof(ati_remote->rc_phys));
863         strlcpy(ati_remote->mouse_phys, ati_remote->rc_phys,
864                 sizeof(ati_remote->mouse_phys));
865 
866         strlcat(ati_remote->rc_phys, "/input0", sizeof(ati_remote->rc_phys));
867         strlcat(ati_remote->mouse_phys, "/input1", sizeof(ati_remote->mouse_phys));
868 
869         if (udev->manufacturer)
870                 strlcpy(ati_remote->rc_name, udev->manufacturer,
871                         sizeof(ati_remote->rc_name));
872 
873         if (udev->product)
874                 snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
875                          "%s %s", ati_remote->rc_name, udev->product);
876 
877         if (!strlen(ati_remote->rc_name))
878                 snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
879                         DRIVER_DESC "(%04x,%04x)",
880                         le16_to_cpu(ati_remote->udev->descriptor.idVendor),
881                         le16_to_cpu(ati_remote->udev->descriptor.idProduct));
882 
883         snprintf(ati_remote->mouse_name, sizeof(ati_remote->mouse_name),
884                  "%s mouse", ati_remote->rc_name);
885 
886         rc_dev->map_name = RC_MAP_ATI_X10; /* default map */
887 
888         /* set default keymap according to receiver model */
889         if (type) {
890                 if (type->default_keymap)
891                         rc_dev->map_name = type->default_keymap;
892                 else if (type->get_default_keymap)
893                         rc_dev->map_name = type->get_default_keymap(interface);
894         }
895 
896         ati_remote_rc_init(ati_remote);
897         mutex_init(&ati_remote->open_mutex);
898 
899         /* Device Hardware Initialization - fills in ati_remote->idev from udev. */
900         err = ati_remote_initialize(ati_remote);
901         if (err)
902                 goto exit_kill_urbs;
903 
904         /* Set up and register rc device */
905         err = rc_register_device(ati_remote->rdev);
906         if (err)
907                 goto exit_kill_urbs;
908 
909         /* use our delay for rc_dev */
910         ati_remote->rdev->input_dev->rep[REP_DELAY] = repeat_delay;
911 
912         /* Set up and register mouse input device */
913         if (mouse) {
914                 input_dev = input_allocate_device();
915                 if (!input_dev) {
916                         err = -ENOMEM;
917                         goto exit_unregister_device;
918                 }
919 
920                 ati_remote->idev = input_dev;
921                 ati_remote_input_init(ati_remote);
922                 err = input_register_device(input_dev);
923 
924                 if (err)
925                         goto exit_free_input_device;
926         }
927 
928         usb_set_intfdata(interface, ati_remote);
929         return 0;
930 
931  exit_free_input_device:
932         input_free_device(input_dev);
933  exit_unregister_device:
934         rc_unregister_device(rc_dev);
935         rc_dev = NULL;
936  exit_kill_urbs:
937         usb_kill_urb(ati_remote->irq_urb);
938         usb_kill_urb(ati_remote->out_urb);
939  exit_free_buffers:
940         ati_remote_free_buffers(ati_remote);
941  exit_free_dev_rdev:
942          rc_free_device(rc_dev);
943         kfree(ati_remote);
944         return err;
945 }
946 
947 /*
948  * ati_remote_disconnect
949  */
950 static void ati_remote_disconnect(struct usb_interface *interface)
951 {
952         struct ati_remote *ati_remote;
953 
954         ati_remote = usb_get_intfdata(interface);
955         usb_set_intfdata(interface, NULL);
956         if (!ati_remote) {
957                 dev_warn(&interface->dev, "%s - null device?\n", __func__);
958                 return;
959         }
960 
961         usb_kill_urb(ati_remote->irq_urb);
962         usb_kill_urb(ati_remote->out_urb);
963         if (ati_remote->idev)
964                 input_unregister_device(ati_remote->idev);
965         rc_unregister_device(ati_remote->rdev);
966         ati_remote_free_buffers(ati_remote);
967         kfree(ati_remote);
968 }
969 
970 /* usb specific object to register with the usb subsystem */
971 static struct usb_driver ati_remote_driver = {
972         .name         = "ati_remote",
973         .probe        = ati_remote_probe,
974         .disconnect   = ati_remote_disconnect,
975         .id_table     = ati_remote_table,
976 };
977 
978 module_usb_driver(ati_remote_driver);
979 
980 MODULE_AUTHOR(DRIVER_AUTHOR);
981 MODULE_DESCRIPTION(DRIVER_DESC);
982 MODULE_LICENSE("GPL");
983 

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