Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 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

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 */
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 

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