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[media] imon: fix usbdev leaks
[deliverable/linux.git] / drivers / media / rc / imon.c
1 /*
2 * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
3 *
4 * Copyright(C) 2010 Jarod Wilson <jarod@wilsonet.com>
5 * Portions based on the original lirc_imon driver,
6 * Copyright(C) 2004 Venky Raju(dev@venky.ws)
7 *
8 * Huge thanks to R. Geoff Newbury for invaluable debugging on the
9 * 0xffdc iMON devices, and for sending me one to hack on, without
10 * which the support for them wouldn't be nearly as good. Thanks
11 * also to the numerous 0xffdc device owners that tested auto-config
12 * support for me and provided debug dumps from their devices.
13 *
14 * imon is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
30
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/slab.h>
36 #include <linux/uaccess.h>
37 #include <linux/ratelimit.h>
38
39 #include <linux/input.h>
40 #include <linux/usb.h>
41 #include <linux/usb/input.h>
42 #include <media/rc-core.h>
43
44 #include <linux/time.h>
45 #include <linux/timer.h>
46
47 #define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
48 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
49 #define MOD_NAME "imon"
50 #define MOD_VERSION "0.9.4"
51
52 #define DISPLAY_MINOR_BASE 144
53 #define DEVICE_NAME "lcd%d"
54
55 #define BUF_CHUNK_SIZE 8
56 #define BUF_SIZE 128
57
58 #define BIT_DURATION 250 /* each bit received is 250us */
59
60 #define IMON_CLOCK_ENABLE_PACKETS 2
61
62 /*** P R O T O T Y P E S ***/
63
64 /* USB Callback prototypes */
65 static int imon_probe(struct usb_interface *interface,
66 const struct usb_device_id *id);
67 static void imon_disconnect(struct usb_interface *interface);
68 static void usb_rx_callback_intf0(struct urb *urb);
69 static void usb_rx_callback_intf1(struct urb *urb);
70 static void usb_tx_callback(struct urb *urb);
71
72 /* suspend/resume support */
73 static int imon_resume(struct usb_interface *intf);
74 static int imon_suspend(struct usb_interface *intf, pm_message_t message);
75
76 /* Display file_operations function prototypes */
77 static int display_open(struct inode *inode, struct file *file);
78 static int display_close(struct inode *inode, struct file *file);
79
80 /* VFD write operation */
81 static ssize_t vfd_write(struct file *file, const char __user *buf,
82 size_t n_bytes, loff_t *pos);
83
84 /* LCD file_operations override function prototypes */
85 static ssize_t lcd_write(struct file *file, const char __user *buf,
86 size_t n_bytes, loff_t *pos);
87
88 /*** G L O B A L S ***/
89
90 struct imon_panel_key_table {
91 u64 hw_code;
92 u32 keycode;
93 };
94
95 struct imon_usb_dev_descr {
96 __u16 flags;
97 #define IMON_NO_FLAGS 0
98 #define IMON_NEED_20MS_PKT_DELAY 1
99 struct imon_panel_key_table key_table[];
100 };
101
102 struct imon_context {
103 struct device *dev;
104 /* Newer devices have two interfaces */
105 struct usb_device *usbdev_intf0;
106 struct usb_device *usbdev_intf1;
107
108 bool display_supported; /* not all controllers do */
109 bool display_isopen; /* display port has been opened */
110 bool rf_device; /* true if iMON 2.4G LT/DT RF device */
111 bool rf_isassociating; /* RF remote associating */
112 bool dev_present_intf0; /* USB device presence, interface 0 */
113 bool dev_present_intf1; /* USB device presence, interface 1 */
114
115 struct mutex lock; /* to lock this object */
116 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
117
118 struct usb_endpoint_descriptor *rx_endpoint_intf0;
119 struct usb_endpoint_descriptor *rx_endpoint_intf1;
120 struct usb_endpoint_descriptor *tx_endpoint;
121 struct urb *rx_urb_intf0;
122 struct urb *rx_urb_intf1;
123 struct urb *tx_urb;
124 bool tx_control;
125 unsigned char usb_rx_buf[8];
126 unsigned char usb_tx_buf[8];
127 unsigned int send_packet_delay;
128
129 struct tx_t {
130 unsigned char data_buf[35]; /* user data buffer */
131 struct completion finished; /* wait for write to finish */
132 bool busy; /* write in progress */
133 int status; /* status of tx completion */
134 } tx;
135
136 u16 vendor; /* usb vendor ID */
137 u16 product; /* usb product ID */
138
139 struct rc_dev *rdev; /* rc-core device for remote */
140 struct input_dev *idev; /* input device for panel & IR mouse */
141 struct input_dev *touch; /* input device for touchscreen */
142
143 spinlock_t kc_lock; /* make sure we get keycodes right */
144 u32 kc; /* current input keycode */
145 u32 last_keycode; /* last reported input keycode */
146 u32 rc_scancode; /* the computed remote scancode */
147 u8 rc_toggle; /* the computed remote toggle bit */
148 u64 rc_type; /* iMON or MCE (RC6) IR protocol? */
149 bool release_code; /* some keys send a release code */
150
151 u8 display_type; /* store the display type */
152 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
153
154 char name_rdev[128]; /* rc input device name */
155 char phys_rdev[64]; /* rc input device phys path */
156
157 char name_idev[128]; /* input device name */
158 char phys_idev[64]; /* input device phys path */
159
160 char name_touch[128]; /* touch screen name */
161 char phys_touch[64]; /* touch screen phys path */
162 struct timer_list ttimer; /* touch screen timer */
163 int touch_x; /* x coordinate on touchscreen */
164 int touch_y; /* y coordinate on touchscreen */
165 struct imon_usb_dev_descr *dev_descr; /* device description with key
166 table for front panels */
167 };
168
169 #define TOUCH_TIMEOUT (HZ/30)
170
171 /* vfd character device file operations */
172 static const struct file_operations vfd_fops = {
173 .owner = THIS_MODULE,
174 .open = &display_open,
175 .write = &vfd_write,
176 .release = &display_close,
177 .llseek = noop_llseek,
178 };
179
180 /* lcd character device file operations */
181 static const struct file_operations lcd_fops = {
182 .owner = THIS_MODULE,
183 .open = &display_open,
184 .write = &lcd_write,
185 .release = &display_close,
186 .llseek = noop_llseek,
187 };
188
189 enum {
190 IMON_DISPLAY_TYPE_AUTO = 0,
191 IMON_DISPLAY_TYPE_VFD = 1,
192 IMON_DISPLAY_TYPE_LCD = 2,
193 IMON_DISPLAY_TYPE_VGA = 3,
194 IMON_DISPLAY_TYPE_NONE = 4,
195 };
196
197 enum {
198 IMON_KEY_IMON = 0,
199 IMON_KEY_MCE = 1,
200 IMON_KEY_PANEL = 2,
201 };
202
203 static struct usb_class_driver imon_vfd_class = {
204 .name = DEVICE_NAME,
205 .fops = &vfd_fops,
206 .minor_base = DISPLAY_MINOR_BASE,
207 };
208
209 static struct usb_class_driver imon_lcd_class = {
210 .name = DEVICE_NAME,
211 .fops = &lcd_fops,
212 .minor_base = DISPLAY_MINOR_BASE,
213 };
214
215 /* imon receiver front panel/knob key table */
216 static const struct imon_usb_dev_descr imon_default_table = {
217 .flags = IMON_NO_FLAGS,
218 .key_table = {
219 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
220 { 0x000000001200ffeell, KEY_UP },
221 { 0x000000001300ffeell, KEY_DOWN },
222 { 0x000000001400ffeell, KEY_LEFT },
223 { 0x000000001500ffeell, KEY_RIGHT },
224 { 0x000000001600ffeell, KEY_ENTER },
225 { 0x000000001700ffeell, KEY_ESC },
226 { 0x000000001f00ffeell, KEY_AUDIO },
227 { 0x000000002000ffeell, KEY_VIDEO },
228 { 0x000000002100ffeell, KEY_CAMERA },
229 { 0x000000002700ffeell, KEY_DVD },
230 { 0x000000002300ffeell, KEY_TV },
231 { 0x000000002b00ffeell, KEY_EXIT },
232 { 0x000000002c00ffeell, KEY_SELECT },
233 { 0x000000002d00ffeell, KEY_MENU },
234 { 0x000000000500ffeell, KEY_PREVIOUS },
235 { 0x000000000700ffeell, KEY_REWIND },
236 { 0x000000000400ffeell, KEY_STOP },
237 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
238 { 0x000000000800ffeell, KEY_FASTFORWARD },
239 { 0x000000000600ffeell, KEY_NEXT },
240 { 0x000000010000ffeell, KEY_RIGHT },
241 { 0x000001000000ffeell, KEY_LEFT },
242 { 0x000000003d00ffeell, KEY_SELECT },
243 { 0x000100000000ffeell, KEY_VOLUMEUP },
244 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
245 { 0x000000000100ffeell, KEY_MUTE },
246 /* 0xffdc iMON MCE VFD */
247 { 0x00010000ffffffeell, KEY_VOLUMEUP },
248 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
249 { 0x00000001ffffffeell, KEY_MUTE },
250 { 0x0000000fffffffeell, KEY_MEDIA },
251 { 0x00000012ffffffeell, KEY_UP },
252 { 0x00000013ffffffeell, KEY_DOWN },
253 { 0x00000014ffffffeell, KEY_LEFT },
254 { 0x00000015ffffffeell, KEY_RIGHT },
255 { 0x00000016ffffffeell, KEY_ENTER },
256 { 0x00000017ffffffeell, KEY_ESC },
257 /* iMON Knob values */
258 { 0x000100ffffffffeell, KEY_VOLUMEUP },
259 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
260 { 0x000008ffffffffeell, KEY_MUTE },
261 { 0, KEY_RESERVED },
262 }
263 };
264
265 static const struct imon_usb_dev_descr imon_OEM_VFD = {
266 .flags = IMON_NEED_20MS_PKT_DELAY,
267 .key_table = {
268 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
269 { 0x000000001200ffeell, KEY_UP },
270 { 0x000000001300ffeell, KEY_DOWN },
271 { 0x000000001400ffeell, KEY_LEFT },
272 { 0x000000001500ffeell, KEY_RIGHT },
273 { 0x000000001600ffeell, KEY_ENTER },
274 { 0x000000001700ffeell, KEY_ESC },
275 { 0x000000001f00ffeell, KEY_AUDIO },
276 { 0x000000002b00ffeell, KEY_EXIT },
277 { 0x000000002c00ffeell, KEY_SELECT },
278 { 0x000000002d00ffeell, KEY_MENU },
279 { 0x000000000500ffeell, KEY_PREVIOUS },
280 { 0x000000000700ffeell, KEY_REWIND },
281 { 0x000000000400ffeell, KEY_STOP },
282 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
283 { 0x000000000800ffeell, KEY_FASTFORWARD },
284 { 0x000000000600ffeell, KEY_NEXT },
285 { 0x000000010000ffeell, KEY_RIGHT },
286 { 0x000001000000ffeell, KEY_LEFT },
287 { 0x000000003d00ffeell, KEY_SELECT },
288 { 0x000100000000ffeell, KEY_VOLUMEUP },
289 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
290 { 0x000000000100ffeell, KEY_MUTE },
291 /* 0xffdc iMON MCE VFD */
292 { 0x00010000ffffffeell, KEY_VOLUMEUP },
293 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
294 { 0x00000001ffffffeell, KEY_MUTE },
295 { 0x0000000fffffffeell, KEY_MEDIA },
296 { 0x00000012ffffffeell, KEY_UP },
297 { 0x00000013ffffffeell, KEY_DOWN },
298 { 0x00000014ffffffeell, KEY_LEFT },
299 { 0x00000015ffffffeell, KEY_RIGHT },
300 { 0x00000016ffffffeell, KEY_ENTER },
301 { 0x00000017ffffffeell, KEY_ESC },
302 /* iMON Knob values */
303 { 0x000100ffffffffeell, KEY_VOLUMEUP },
304 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
305 { 0x000008ffffffffeell, KEY_MUTE },
306 { 0, KEY_RESERVED },
307 }
308 };
309
310 /* imon receiver front panel/knob key table for DH102*/
311 static const struct imon_usb_dev_descr imon_DH102 = {
312 .flags = IMON_NO_FLAGS,
313 .key_table = {
314 { 0x000100000000ffeell, KEY_VOLUMEUP },
315 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
316 { 0x000000010000ffeell, KEY_MUTE },
317 { 0x0000000f0000ffeell, KEY_MEDIA },
318 { 0x000000120000ffeell, KEY_UP },
319 { 0x000000130000ffeell, KEY_DOWN },
320 { 0x000000140000ffeell, KEY_LEFT },
321 { 0x000000150000ffeell, KEY_RIGHT },
322 { 0x000000160000ffeell, KEY_ENTER },
323 { 0x000000170000ffeell, KEY_ESC },
324 { 0x0000002b0000ffeell, KEY_EXIT },
325 { 0x0000002c0000ffeell, KEY_SELECT },
326 { 0x0000002d0000ffeell, KEY_MENU },
327 { 0, KEY_RESERVED }
328 }
329 };
330
331 /*
332 * USB Device ID for iMON USB Control Boards
333 *
334 * The Windows drivers contain 6 different inf files, more or less one for
335 * each new device until the 0x0034-0x0046 devices, which all use the same
336 * driver. Some of the devices in the 34-46 range haven't been definitively
337 * identified yet. Early devices have either a TriGem Computer, Inc. or a
338 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
339 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
340 * the ffdc and later devices, which do onboard decoding.
341 */
342 static struct usb_device_id imon_usb_id_table[] = {
343 /*
344 * Several devices with this same device ID, all use iMON_PAD.inf
345 * SoundGraph iMON PAD (IR & VFD)
346 * SoundGraph iMON PAD (IR & LCD)
347 * SoundGraph iMON Knob (IR only)
348 */
349 { USB_DEVICE(0x15c2, 0xffdc),
350 .driver_info = (unsigned long)&imon_default_table },
351
352 /*
353 * Newer devices, all driven by the latest iMON Windows driver, full
354 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
355 * Need user input to fill in details on unknown devices.
356 */
357 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
358 { USB_DEVICE(0x15c2, 0x0034),
359 .driver_info = (unsigned long)&imon_DH102 },
360 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
361 { USB_DEVICE(0x15c2, 0x0035),
362 .driver_info = (unsigned long)&imon_default_table},
363 /* SoundGraph iMON OEM VFD (IR & VFD) */
364 { USB_DEVICE(0x15c2, 0x0036),
365 .driver_info = (unsigned long)&imon_OEM_VFD },
366 /* device specifics unknown */
367 { USB_DEVICE(0x15c2, 0x0037),
368 .driver_info = (unsigned long)&imon_default_table},
369 /* SoundGraph iMON OEM LCD (IR & LCD) */
370 { USB_DEVICE(0x15c2, 0x0038),
371 .driver_info = (unsigned long)&imon_default_table},
372 /* SoundGraph iMON UltraBay (IR & LCD) */
373 { USB_DEVICE(0x15c2, 0x0039),
374 .driver_info = (unsigned long)&imon_default_table},
375 /* device specifics unknown */
376 { USB_DEVICE(0x15c2, 0x003a),
377 .driver_info = (unsigned long)&imon_default_table},
378 /* device specifics unknown */
379 { USB_DEVICE(0x15c2, 0x003b),
380 .driver_info = (unsigned long)&imon_default_table},
381 /* SoundGraph iMON OEM Inside (IR only) */
382 { USB_DEVICE(0x15c2, 0x003c),
383 .driver_info = (unsigned long)&imon_default_table},
384 /* device specifics unknown */
385 { USB_DEVICE(0x15c2, 0x003d),
386 .driver_info = (unsigned long)&imon_default_table},
387 /* device specifics unknown */
388 { USB_DEVICE(0x15c2, 0x003e),
389 .driver_info = (unsigned long)&imon_default_table},
390 /* device specifics unknown */
391 { USB_DEVICE(0x15c2, 0x003f),
392 .driver_info = (unsigned long)&imon_default_table},
393 /* device specifics unknown */
394 { USB_DEVICE(0x15c2, 0x0040),
395 .driver_info = (unsigned long)&imon_default_table},
396 /* SoundGraph iMON MINI (IR only) */
397 { USB_DEVICE(0x15c2, 0x0041),
398 .driver_info = (unsigned long)&imon_default_table},
399 /* Antec Veris Multimedia Station EZ External (IR only) */
400 { USB_DEVICE(0x15c2, 0x0042),
401 .driver_info = (unsigned long)&imon_default_table},
402 /* Antec Veris Multimedia Station Basic Internal (IR only) */
403 { USB_DEVICE(0x15c2, 0x0043),
404 .driver_info = (unsigned long)&imon_default_table},
405 /* Antec Veris Multimedia Station Elite (IR & VFD) */
406 { USB_DEVICE(0x15c2, 0x0044),
407 .driver_info = (unsigned long)&imon_default_table},
408 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
409 { USB_DEVICE(0x15c2, 0x0045),
410 .driver_info = (unsigned long)&imon_default_table},
411 /* device specifics unknown */
412 { USB_DEVICE(0x15c2, 0x0046),
413 .driver_info = (unsigned long)&imon_default_table},
414 {}
415 };
416
417 /* USB Device data */
418 static struct usb_driver imon_driver = {
419 .name = MOD_NAME,
420 .probe = imon_probe,
421 .disconnect = imon_disconnect,
422 .suspend = imon_suspend,
423 .resume = imon_resume,
424 .id_table = imon_usb_id_table,
425 };
426
427 /* to prevent races between open() and disconnect(), probing, etc */
428 static DEFINE_MUTEX(driver_lock);
429
430 /* Module bookkeeping bits */
431 MODULE_AUTHOR(MOD_AUTHOR);
432 MODULE_DESCRIPTION(MOD_DESC);
433 MODULE_VERSION(MOD_VERSION);
434 MODULE_LICENSE("GPL");
435 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
436
437 static bool debug;
438 module_param(debug, bool, S_IRUGO | S_IWUSR);
439 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
440
441 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
442 static int display_type;
443 module_param(display_type, int, S_IRUGO);
444 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
445 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
446
447 static int pad_stabilize = 1;
448 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
449 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
450 "presses in arrow key mode. 0=disable, 1=enable (default).");
451
452 /*
453 * In certain use cases, mouse mode isn't really helpful, and could actually
454 * cause confusion, so allow disabling it when the IR device is open.
455 */
456 static bool nomouse;
457 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
458 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
459 "open. 0=don't disable, 1=disable. (default: don't disable)");
460
461 /* threshold at which a pad push registers as an arrow key in kbd mode */
462 static int pad_thresh;
463 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
464 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
465 "arrow key in kbd mode (default: 28)");
466
467
468 static void free_imon_context(struct imon_context *ictx)
469 {
470 struct device *dev = ictx->dev;
471
472 usb_free_urb(ictx->tx_urb);
473 usb_free_urb(ictx->rx_urb_intf0);
474 usb_free_urb(ictx->rx_urb_intf1);
475 kfree(ictx);
476
477 dev_dbg(dev, "%s: iMON context freed\n", __func__);
478 }
479
480 /**
481 * Called when the Display device (e.g. /dev/lcd0)
482 * is opened by the application.
483 */
484 static int display_open(struct inode *inode, struct file *file)
485 {
486 struct usb_interface *interface;
487 struct imon_context *ictx = NULL;
488 int subminor;
489 int retval = 0;
490
491 /* prevent races with disconnect */
492 mutex_lock(&driver_lock);
493
494 subminor = iminor(inode);
495 interface = usb_find_interface(&imon_driver, subminor);
496 if (!interface) {
497 pr_err("could not find interface for minor %d\n", subminor);
498 retval = -ENODEV;
499 goto exit;
500 }
501 ictx = usb_get_intfdata(interface);
502
503 if (!ictx) {
504 pr_err("no context found for minor %d\n", subminor);
505 retval = -ENODEV;
506 goto exit;
507 }
508
509 mutex_lock(&ictx->lock);
510
511 if (!ictx->display_supported) {
512 pr_err("display not supported by device\n");
513 retval = -ENODEV;
514 } else if (ictx->display_isopen) {
515 pr_err("display port is already open\n");
516 retval = -EBUSY;
517 } else {
518 ictx->display_isopen = true;
519 file->private_data = ictx;
520 dev_dbg(ictx->dev, "display port opened\n");
521 }
522
523 mutex_unlock(&ictx->lock);
524
525 exit:
526 mutex_unlock(&driver_lock);
527 return retval;
528 }
529
530 /**
531 * Called when the display device (e.g. /dev/lcd0)
532 * is closed by the application.
533 */
534 static int display_close(struct inode *inode, struct file *file)
535 {
536 struct imon_context *ictx = NULL;
537 int retval = 0;
538
539 ictx = file->private_data;
540
541 if (!ictx) {
542 pr_err("no context for device\n");
543 return -ENODEV;
544 }
545
546 mutex_lock(&ictx->lock);
547
548 if (!ictx->display_supported) {
549 pr_err("display not supported by device\n");
550 retval = -ENODEV;
551 } else if (!ictx->display_isopen) {
552 pr_err("display is not open\n");
553 retval = -EIO;
554 } else {
555 ictx->display_isopen = false;
556 dev_dbg(ictx->dev, "display port closed\n");
557 }
558
559 mutex_unlock(&ictx->lock);
560 return retval;
561 }
562
563 /**
564 * Sends a packet to the device -- this function must be called with
565 * ictx->lock held, or its unlock/lock sequence while waiting for tx
566 * to complete can/will lead to a deadlock.
567 */
568 static int send_packet(struct imon_context *ictx)
569 {
570 unsigned int pipe;
571 unsigned long timeout;
572 int interval = 0;
573 int retval = 0;
574 struct usb_ctrlrequest *control_req = NULL;
575
576 /* Check if we need to use control or interrupt urb */
577 if (!ictx->tx_control) {
578 pipe = usb_sndintpipe(ictx->usbdev_intf0,
579 ictx->tx_endpoint->bEndpointAddress);
580 interval = ictx->tx_endpoint->bInterval;
581
582 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
583 ictx->usb_tx_buf,
584 sizeof(ictx->usb_tx_buf),
585 usb_tx_callback, ictx, interval);
586
587 ictx->tx_urb->actual_length = 0;
588 } else {
589 /* fill request into kmalloc'ed space: */
590 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
591 GFP_KERNEL);
592 if (control_req == NULL)
593 return -ENOMEM;
594
595 /* setup packet is '21 09 0200 0001 0008' */
596 control_req->bRequestType = 0x21;
597 control_req->bRequest = 0x09;
598 control_req->wValue = cpu_to_le16(0x0200);
599 control_req->wIndex = cpu_to_le16(0x0001);
600 control_req->wLength = cpu_to_le16(0x0008);
601
602 /* control pipe is endpoint 0x00 */
603 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
604
605 /* build the control urb */
606 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
607 pipe, (unsigned char *)control_req,
608 ictx->usb_tx_buf,
609 sizeof(ictx->usb_tx_buf),
610 usb_tx_callback, ictx);
611 ictx->tx_urb->actual_length = 0;
612 }
613
614 init_completion(&ictx->tx.finished);
615 ictx->tx.busy = true;
616 smp_rmb(); /* ensure later readers know we're busy */
617
618 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
619 if (retval) {
620 ictx->tx.busy = false;
621 smp_rmb(); /* ensure later readers know we're not busy */
622 pr_err_ratelimited("error submitting urb(%d)\n", retval);
623 } else {
624 /* Wait for transmission to complete (or abort) */
625 mutex_unlock(&ictx->lock);
626 retval = wait_for_completion_interruptible(
627 &ictx->tx.finished);
628 if (retval) {
629 usb_kill_urb(ictx->tx_urb);
630 pr_err_ratelimited("task interrupted\n");
631 }
632 mutex_lock(&ictx->lock);
633
634 retval = ictx->tx.status;
635 if (retval)
636 pr_err_ratelimited("packet tx failed (%d)\n", retval);
637 }
638
639 kfree(control_req);
640
641 /*
642 * Induce a mandatory delay before returning, as otherwise,
643 * send_packet can get called so rapidly as to overwhelm the device,
644 * particularly on faster systems and/or those with quirky usb.
645 */
646 timeout = msecs_to_jiffies(ictx->send_packet_delay);
647 set_current_state(TASK_INTERRUPTIBLE);
648 schedule_timeout(timeout);
649
650 return retval;
651 }
652
653 /**
654 * Sends an associate packet to the iMON 2.4G.
655 *
656 * This might not be such a good idea, since it has an id collision with
657 * some versions of the "IR & VFD" combo. The only way to determine if it
658 * is an RF version is to look at the product description string. (Which
659 * we currently do not fetch).
660 */
661 static int send_associate_24g(struct imon_context *ictx)
662 {
663 int retval;
664 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
665 0x00, 0x00, 0x00, 0x20 };
666
667 if (!ictx) {
668 pr_err("no context for device\n");
669 return -ENODEV;
670 }
671
672 if (!ictx->dev_present_intf0) {
673 pr_err("no iMON device present\n");
674 return -ENODEV;
675 }
676
677 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
678 retval = send_packet(ictx);
679
680 return retval;
681 }
682
683 /**
684 * Sends packets to setup and show clock on iMON display
685 *
686 * Arguments: year - last 2 digits of year, month - 1..12,
687 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
688 * hour - 0..23, minute - 0..59, second - 0..59
689 */
690 static int send_set_imon_clock(struct imon_context *ictx,
691 unsigned int year, unsigned int month,
692 unsigned int day, unsigned int dow,
693 unsigned int hour, unsigned int minute,
694 unsigned int second)
695 {
696 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
697 int retval = 0;
698 int i;
699
700 if (!ictx) {
701 pr_err("no context for device\n");
702 return -ENODEV;
703 }
704
705 switch (ictx->display_type) {
706 case IMON_DISPLAY_TYPE_LCD:
707 clock_enable_pkt[0][0] = 0x80;
708 clock_enable_pkt[0][1] = year;
709 clock_enable_pkt[0][2] = month-1;
710 clock_enable_pkt[0][3] = day;
711 clock_enable_pkt[0][4] = hour;
712 clock_enable_pkt[0][5] = minute;
713 clock_enable_pkt[0][6] = second;
714
715 clock_enable_pkt[1][0] = 0x80;
716 clock_enable_pkt[1][1] = 0;
717 clock_enable_pkt[1][2] = 0;
718 clock_enable_pkt[1][3] = 0;
719 clock_enable_pkt[1][4] = 0;
720 clock_enable_pkt[1][5] = 0;
721 clock_enable_pkt[1][6] = 0;
722
723 if (ictx->product == 0xffdc) {
724 clock_enable_pkt[0][7] = 0x50;
725 clock_enable_pkt[1][7] = 0x51;
726 } else {
727 clock_enable_pkt[0][7] = 0x88;
728 clock_enable_pkt[1][7] = 0x8a;
729 }
730
731 break;
732
733 case IMON_DISPLAY_TYPE_VFD:
734 clock_enable_pkt[0][0] = year;
735 clock_enable_pkt[0][1] = month-1;
736 clock_enable_pkt[0][2] = day;
737 clock_enable_pkt[0][3] = dow;
738 clock_enable_pkt[0][4] = hour;
739 clock_enable_pkt[0][5] = minute;
740 clock_enable_pkt[0][6] = second;
741 clock_enable_pkt[0][7] = 0x40;
742
743 clock_enable_pkt[1][0] = 0;
744 clock_enable_pkt[1][1] = 0;
745 clock_enable_pkt[1][2] = 1;
746 clock_enable_pkt[1][3] = 0;
747 clock_enable_pkt[1][4] = 0;
748 clock_enable_pkt[1][5] = 0;
749 clock_enable_pkt[1][6] = 0;
750 clock_enable_pkt[1][7] = 0x42;
751
752 break;
753
754 default:
755 return -ENODEV;
756 }
757
758 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
759 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
760 retval = send_packet(ictx);
761 if (retval) {
762 pr_err("send_packet failed for packet %d\n", i);
763 break;
764 }
765 }
766
767 return retval;
768 }
769
770 /**
771 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
772 */
773 static ssize_t show_associate_remote(struct device *d,
774 struct device_attribute *attr,
775 char *buf)
776 {
777 struct imon_context *ictx = dev_get_drvdata(d);
778
779 if (!ictx)
780 return -ENODEV;
781
782 mutex_lock(&ictx->lock);
783 if (ictx->rf_isassociating)
784 strcpy(buf, "associating\n");
785 else
786 strcpy(buf, "closed\n");
787
788 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
789 "instructions on how to associate your iMON 2.4G DT/LT "
790 "remote\n");
791 mutex_unlock(&ictx->lock);
792 return strlen(buf);
793 }
794
795 static ssize_t store_associate_remote(struct device *d,
796 struct device_attribute *attr,
797 const char *buf, size_t count)
798 {
799 struct imon_context *ictx;
800
801 ictx = dev_get_drvdata(d);
802
803 if (!ictx)
804 return -ENODEV;
805
806 mutex_lock(&ictx->lock);
807 ictx->rf_isassociating = true;
808 send_associate_24g(ictx);
809 mutex_unlock(&ictx->lock);
810
811 return count;
812 }
813
814 /**
815 * sysfs functions to control internal imon clock
816 */
817 static ssize_t show_imon_clock(struct device *d,
818 struct device_attribute *attr, char *buf)
819 {
820 struct imon_context *ictx = dev_get_drvdata(d);
821 size_t len;
822
823 if (!ictx)
824 return -ENODEV;
825
826 mutex_lock(&ictx->lock);
827
828 if (!ictx->display_supported) {
829 len = snprintf(buf, PAGE_SIZE, "Not supported.");
830 } else {
831 len = snprintf(buf, PAGE_SIZE,
832 "To set the clock on your iMON display:\n"
833 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
834 "%s", ictx->display_isopen ?
835 "\nNOTE: imon device must be closed\n" : "");
836 }
837
838 mutex_unlock(&ictx->lock);
839
840 return len;
841 }
842
843 static ssize_t store_imon_clock(struct device *d,
844 struct device_attribute *attr,
845 const char *buf, size_t count)
846 {
847 struct imon_context *ictx = dev_get_drvdata(d);
848 ssize_t retval;
849 unsigned int year, month, day, dow, hour, minute, second;
850
851 if (!ictx)
852 return -ENODEV;
853
854 mutex_lock(&ictx->lock);
855
856 if (!ictx->display_supported) {
857 retval = -ENODEV;
858 goto exit;
859 } else if (ictx->display_isopen) {
860 retval = -EBUSY;
861 goto exit;
862 }
863
864 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
865 &hour, &minute, &second) != 7) {
866 retval = -EINVAL;
867 goto exit;
868 }
869
870 if ((month < 1 || month > 12) ||
871 (day < 1 || day > 31) || (dow > 6) ||
872 (hour > 23) || (minute > 59) || (second > 59)) {
873 retval = -EINVAL;
874 goto exit;
875 }
876
877 retval = send_set_imon_clock(ictx, year, month, day, dow,
878 hour, minute, second);
879 if (retval)
880 goto exit;
881
882 retval = count;
883 exit:
884 mutex_unlock(&ictx->lock);
885
886 return retval;
887 }
888
889
890 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
891 store_imon_clock);
892
893 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
894 store_associate_remote);
895
896 static struct attribute *imon_display_sysfs_entries[] = {
897 &dev_attr_imon_clock.attr,
898 NULL
899 };
900
901 static struct attribute_group imon_display_attr_group = {
902 .attrs = imon_display_sysfs_entries
903 };
904
905 static struct attribute *imon_rf_sysfs_entries[] = {
906 &dev_attr_associate_remote.attr,
907 NULL
908 };
909
910 static struct attribute_group imon_rf_attr_group = {
911 .attrs = imon_rf_sysfs_entries
912 };
913
914 /**
915 * Writes data to the VFD. The iMON VFD is 2x16 characters
916 * and requires data in 5 consecutive USB interrupt packets,
917 * each packet but the last carrying 7 bytes.
918 *
919 * I don't know if the VFD board supports features such as
920 * scrolling, clearing rows, blanking, etc. so at
921 * the caller must provide a full screen of data. If fewer
922 * than 32 bytes are provided spaces will be appended to
923 * generate a full screen.
924 */
925 static ssize_t vfd_write(struct file *file, const char __user *buf,
926 size_t n_bytes, loff_t *pos)
927 {
928 int i;
929 int offset;
930 int seq;
931 int retval = 0;
932 struct imon_context *ictx;
933 const unsigned char vfd_packet6[] = {
934 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
935
936 ictx = file->private_data;
937 if (!ictx) {
938 pr_err_ratelimited("no context for device\n");
939 return -ENODEV;
940 }
941
942 mutex_lock(&ictx->lock);
943
944 if (!ictx->dev_present_intf0) {
945 pr_err_ratelimited("no iMON device present\n");
946 retval = -ENODEV;
947 goto exit;
948 }
949
950 if (n_bytes <= 0 || n_bytes > 32) {
951 pr_err_ratelimited("invalid payload size\n");
952 retval = -EINVAL;
953 goto exit;
954 }
955
956 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
957 retval = -EFAULT;
958 goto exit;
959 }
960
961 /* Pad with spaces */
962 for (i = n_bytes; i < 32; ++i)
963 ictx->tx.data_buf[i] = ' ';
964
965 for (i = 32; i < 35; ++i)
966 ictx->tx.data_buf[i] = 0xFF;
967
968 offset = 0;
969 seq = 0;
970
971 do {
972 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
973 ictx->usb_tx_buf[7] = (unsigned char) seq;
974
975 retval = send_packet(ictx);
976 if (retval) {
977 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
978 goto exit;
979 } else {
980 seq += 2;
981 offset += 7;
982 }
983
984 } while (offset < 35);
985
986 /* Send packet #6 */
987 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
988 ictx->usb_tx_buf[7] = (unsigned char) seq;
989 retval = send_packet(ictx);
990 if (retval)
991 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
992
993 exit:
994 mutex_unlock(&ictx->lock);
995
996 return (!retval) ? n_bytes : retval;
997 }
998
999 /**
1000 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
1001 * packets. We accept data as 16 hexadecimal digits, followed by a
1002 * newline (to make it easy to drive the device from a command-line
1003 * -- even though the actual binary data is a bit complicated).
1004 *
1005 * The device itself is not a "traditional" text-mode display. It's
1006 * actually a 16x96 pixel bitmap display. That means if you want to
1007 * display text, you've got to have your own "font" and translate the
1008 * text into bitmaps for display. This is really flexible (you can
1009 * display whatever diacritics you need, and so on), but it's also
1010 * a lot more complicated than most LCDs...
1011 */
1012 static ssize_t lcd_write(struct file *file, const char __user *buf,
1013 size_t n_bytes, loff_t *pos)
1014 {
1015 int retval = 0;
1016 struct imon_context *ictx;
1017
1018 ictx = file->private_data;
1019 if (!ictx) {
1020 pr_err_ratelimited("no context for device\n");
1021 return -ENODEV;
1022 }
1023
1024 mutex_lock(&ictx->lock);
1025
1026 if (!ictx->display_supported) {
1027 pr_err_ratelimited("no iMON display present\n");
1028 retval = -ENODEV;
1029 goto exit;
1030 }
1031
1032 if (n_bytes != 8) {
1033 pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
1034 (int)n_bytes);
1035 retval = -EINVAL;
1036 goto exit;
1037 }
1038
1039 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
1040 retval = -EFAULT;
1041 goto exit;
1042 }
1043
1044 retval = send_packet(ictx);
1045 if (retval) {
1046 pr_err_ratelimited("send packet failed!\n");
1047 goto exit;
1048 } else {
1049 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
1050 __func__, (int) n_bytes);
1051 }
1052 exit:
1053 mutex_unlock(&ictx->lock);
1054 return (!retval) ? n_bytes : retval;
1055 }
1056
1057 /**
1058 * Callback function for USB core API: transmit data
1059 */
1060 static void usb_tx_callback(struct urb *urb)
1061 {
1062 struct imon_context *ictx;
1063
1064 if (!urb)
1065 return;
1066 ictx = (struct imon_context *)urb->context;
1067 if (!ictx)
1068 return;
1069
1070 ictx->tx.status = urb->status;
1071
1072 /* notify waiters that write has finished */
1073 ictx->tx.busy = false;
1074 smp_rmb(); /* ensure later readers know we're not busy */
1075 complete(&ictx->tx.finished);
1076 }
1077
1078 /**
1079 * report touchscreen input
1080 */
1081 static void imon_touch_display_timeout(unsigned long data)
1082 {
1083 struct imon_context *ictx = (struct imon_context *)data;
1084
1085 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
1086 return;
1087
1088 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1089 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1090 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
1091 input_sync(ictx->touch);
1092 }
1093
1094 /**
1095 * iMON IR receivers support two different signal sets -- those used by
1096 * the iMON remotes, and those used by the Windows MCE remotes (which is
1097 * really just RC-6), but only one or the other at a time, as the signals
1098 * are decoded onboard the receiver.
1099 *
1100 * This function gets called two different ways, one way is from
1101 * rc_register_device, for initial protocol selection/setup, and the other is
1102 * via a userspace-initiated protocol change request, either by direct sysfs
1103 * prodding or by something like ir-keytable. In the rc_register_device case,
1104 * the imon context lock is already held, but when initiated from userspace,
1105 * it is not, so we must acquire it prior to calling send_packet, which
1106 * requires that the lock is held.
1107 */
1108 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_type)
1109 {
1110 int retval;
1111 struct imon_context *ictx = rc->priv;
1112 struct device *dev = ictx->dev;
1113 bool unlock = false;
1114 unsigned char ir_proto_packet[] = {
1115 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1116
1117 if (*rc_type && !(*rc_type & rc->allowed_protocols))
1118 dev_warn(dev, "Looks like you're trying to use an IR protocol "
1119 "this device does not support\n");
1120
1121 if (*rc_type & RC_BIT_RC6_MCE) {
1122 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1123 ir_proto_packet[0] = 0x01;
1124 *rc_type = RC_BIT_RC6_MCE;
1125 } else if (*rc_type & RC_BIT_OTHER) {
1126 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1127 if (!pad_stabilize)
1128 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1129 /* ir_proto_packet[0] = 0x00; // already the default */
1130 *rc_type = RC_BIT_OTHER;
1131 } else {
1132 dev_warn(dev, "Unsupported IR protocol specified, overriding "
1133 "to iMON IR protocol\n");
1134 if (!pad_stabilize)
1135 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1136 /* ir_proto_packet[0] = 0x00; // already the default */
1137 *rc_type = RC_BIT_OTHER;
1138 }
1139
1140 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1141
1142 if (!mutex_is_locked(&ictx->lock)) {
1143 unlock = true;
1144 mutex_lock(&ictx->lock);
1145 }
1146
1147 retval = send_packet(ictx);
1148 if (retval)
1149 goto out;
1150
1151 ictx->rc_type = *rc_type;
1152 ictx->pad_mouse = false;
1153
1154 out:
1155 if (unlock)
1156 mutex_unlock(&ictx->lock);
1157
1158 return retval;
1159 }
1160
1161 static inline int tv2int(const struct timeval *a, const struct timeval *b)
1162 {
1163 int usecs = 0;
1164 int sec = 0;
1165
1166 if (b->tv_usec > a->tv_usec) {
1167 usecs = 1000000;
1168 sec--;
1169 }
1170
1171 usecs += a->tv_usec - b->tv_usec;
1172
1173 sec += a->tv_sec - b->tv_sec;
1174 sec *= 1000;
1175 usecs /= 1000;
1176 sec += usecs;
1177
1178 if (sec < 0)
1179 sec = 1000;
1180
1181 return sec;
1182 }
1183
1184 /**
1185 * The directional pad behaves a bit differently, depending on whether this is
1186 * one of the older ffdc devices or a newer device. Newer devices appear to
1187 * have a higher resolution matrix for more precise mouse movement, but it
1188 * makes things overly sensitive in keyboard mode, so we do some interesting
1189 * contortions to make it less touchy. Older devices run through the same
1190 * routine with shorter timeout and a smaller threshold.
1191 */
1192 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1193 {
1194 struct timeval ct;
1195 static struct timeval prev_time = {0, 0};
1196 static struct timeval hit_time = {0, 0};
1197 static int x, y, prev_result, hits;
1198 int result = 0;
1199 int msec, msec_hit;
1200
1201 do_gettimeofday(&ct);
1202 msec = tv2int(&ct, &prev_time);
1203 msec_hit = tv2int(&ct, &hit_time);
1204
1205 if (msec > 100) {
1206 x = 0;
1207 y = 0;
1208 hits = 0;
1209 }
1210
1211 x += a;
1212 y += b;
1213
1214 prev_time = ct;
1215
1216 if (abs(x) > threshold || abs(y) > threshold) {
1217 if (abs(y) > abs(x))
1218 result = (y > 0) ? 0x7F : 0x80;
1219 else
1220 result = (x > 0) ? 0x7F00 : 0x8000;
1221
1222 x = 0;
1223 y = 0;
1224
1225 if (result == prev_result) {
1226 hits++;
1227
1228 if (hits > 3) {
1229 switch (result) {
1230 case 0x7F:
1231 y = 17 * threshold / 30;
1232 break;
1233 case 0x80:
1234 y -= 17 * threshold / 30;
1235 break;
1236 case 0x7F00:
1237 x = 17 * threshold / 30;
1238 break;
1239 case 0x8000:
1240 x -= 17 * threshold / 30;
1241 break;
1242 }
1243 }
1244
1245 if (hits == 2 && msec_hit < timeout) {
1246 result = 0;
1247 hits = 1;
1248 }
1249 } else {
1250 prev_result = result;
1251 hits = 1;
1252 hit_time = ct;
1253 }
1254 }
1255
1256 return result;
1257 }
1258
1259 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1260 {
1261 u32 keycode;
1262 u32 release;
1263 bool is_release_code = false;
1264
1265 /* Look for the initial press of a button */
1266 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1267 ictx->rc_toggle = 0x0;
1268 ictx->rc_scancode = scancode;
1269
1270 /* Look for the release of a button */
1271 if (keycode == KEY_RESERVED) {
1272 release = scancode & ~0x4000;
1273 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1274 if (keycode != KEY_RESERVED)
1275 is_release_code = true;
1276 }
1277
1278 ictx->release_code = is_release_code;
1279
1280 return keycode;
1281 }
1282
1283 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1284 {
1285 u32 keycode;
1286
1287 #define MCE_KEY_MASK 0x7000
1288 #define MCE_TOGGLE_BIT 0x8000
1289
1290 /*
1291 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1292 * (the toggle bit flipping between alternating key presses), while
1293 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1294 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1295 * but we can't or them into all codes, as some keys are decoded in
1296 * a different way w/o the same use of the toggle bit...
1297 */
1298 if (scancode & 0x80000000)
1299 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1300
1301 ictx->rc_scancode = scancode;
1302 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1303
1304 /* not used in mce mode, but make sure we know its false */
1305 ictx->release_code = false;
1306
1307 return keycode;
1308 }
1309
1310 static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code)
1311 {
1312 int i;
1313 u32 keycode = KEY_RESERVED;
1314 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table;
1315
1316 for (i = 0; key_table[i].hw_code != 0; i++) {
1317 if (key_table[i].hw_code == (code | 0xffee)) {
1318 keycode = key_table[i].keycode;
1319 break;
1320 }
1321 }
1322 ictx->release_code = false;
1323 return keycode;
1324 }
1325
1326 static bool imon_mouse_event(struct imon_context *ictx,
1327 unsigned char *buf, int len)
1328 {
1329 signed char rel_x = 0x00, rel_y = 0x00;
1330 u8 right_shift = 1;
1331 bool mouse_input = true;
1332 int dir = 0;
1333 unsigned long flags;
1334
1335 spin_lock_irqsave(&ictx->kc_lock, flags);
1336
1337 /* newer iMON device PAD or mouse button */
1338 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1339 rel_x = buf[2];
1340 rel_y = buf[3];
1341 right_shift = 1;
1342 /* 0xffdc iMON PAD or mouse button input */
1343 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1344 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1345 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1346 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1347 if (buf[0] & 0x02)
1348 rel_x |= ~0x0f;
1349 rel_x = rel_x + rel_x / 2;
1350 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1351 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1352 if (buf[0] & 0x01)
1353 rel_y |= ~0x0f;
1354 rel_y = rel_y + rel_y / 2;
1355 right_shift = 2;
1356 /* some ffdc devices decode mouse buttons differently... */
1357 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1358 right_shift = 2;
1359 /* ch+/- buttons, which we use for an emulated scroll wheel */
1360 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1361 dir = 1;
1362 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1363 dir = -1;
1364 } else
1365 mouse_input = false;
1366
1367 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1368
1369 if (mouse_input) {
1370 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1371
1372 if (dir) {
1373 input_report_rel(ictx->idev, REL_WHEEL, dir);
1374 } else if (rel_x || rel_y) {
1375 input_report_rel(ictx->idev, REL_X, rel_x);
1376 input_report_rel(ictx->idev, REL_Y, rel_y);
1377 } else {
1378 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1379 input_report_key(ictx->idev, BTN_RIGHT,
1380 buf[1] >> right_shift & 0x1);
1381 }
1382 input_sync(ictx->idev);
1383 spin_lock_irqsave(&ictx->kc_lock, flags);
1384 ictx->last_keycode = ictx->kc;
1385 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1386 }
1387
1388 return mouse_input;
1389 }
1390
1391 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1392 {
1393 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1394 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1395 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1396 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1397 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1398 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1399 input_sync(ictx->touch);
1400 }
1401
1402 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1403 {
1404 int dir = 0;
1405 signed char rel_x = 0x00, rel_y = 0x00;
1406 u16 timeout, threshold;
1407 u32 scancode = KEY_RESERVED;
1408 unsigned long flags;
1409
1410 /*
1411 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1412 * contain a position coordinate (x,y), with each component ranging
1413 * from -14 to 14. We want to down-sample this to only 4 discrete values
1414 * for up/down/left/right arrow keys. Also, when you get too close to
1415 * diagonals, it has a tendency to jump back and forth, so lets try to
1416 * ignore when they get too close.
1417 */
1418 if (ictx->product != 0xffdc) {
1419 /* first, pad to 8 bytes so it conforms with everything else */
1420 buf[5] = buf[6] = buf[7] = 0;
1421 timeout = 500; /* in msecs */
1422 /* (2*threshold) x (2*threshold) square */
1423 threshold = pad_thresh ? pad_thresh : 28;
1424 rel_x = buf[2];
1425 rel_y = buf[3];
1426
1427 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) {
1428 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1429 dir = stabilize((int)rel_x, (int)rel_y,
1430 timeout, threshold);
1431 if (!dir) {
1432 spin_lock_irqsave(&ictx->kc_lock,
1433 flags);
1434 ictx->kc = KEY_UNKNOWN;
1435 spin_unlock_irqrestore(&ictx->kc_lock,
1436 flags);
1437 return;
1438 }
1439 buf[2] = dir & 0xFF;
1440 buf[3] = (dir >> 8) & 0xFF;
1441 scancode = be32_to_cpu(*((__be32 *)buf));
1442 }
1443 } else {
1444 /*
1445 * Hack alert: instead of using keycodes, we have
1446 * to use hard-coded scancodes here...
1447 */
1448 if (abs(rel_y) > abs(rel_x)) {
1449 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1450 buf[3] = 0;
1451 if (rel_y > 0)
1452 scancode = 0x01007f00; /* KEY_DOWN */
1453 else
1454 scancode = 0x01008000; /* KEY_UP */
1455 } else {
1456 buf[2] = 0;
1457 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1458 if (rel_x > 0)
1459 scancode = 0x0100007f; /* KEY_RIGHT */
1460 else
1461 scancode = 0x01000080; /* KEY_LEFT */
1462 }
1463 }
1464
1465 /*
1466 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1467 * device (15c2:ffdc). The remote generates various codes from
1468 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1469 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1470 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1471 * reversed endianness. Extract direction from buffer, rotate endianness,
1472 * adjust sign and feed the values into stabilize(). The resulting codes
1473 * will be 0x01008000, 0x01007F00, which match the newer devices.
1474 */
1475 } else {
1476 timeout = 10; /* in msecs */
1477 /* (2*threshold) x (2*threshold) square */
1478 threshold = pad_thresh ? pad_thresh : 15;
1479
1480 /* buf[1] is x */
1481 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1482 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1483 if (buf[0] & 0x02)
1484 rel_x |= ~0x10+1;
1485 /* buf[2] is y */
1486 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1487 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1488 if (buf[0] & 0x01)
1489 rel_y |= ~0x10+1;
1490
1491 buf[0] = 0x01;
1492 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1493
1494 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) {
1495 dir = stabilize((int)rel_x, (int)rel_y,
1496 timeout, threshold);
1497 if (!dir) {
1498 spin_lock_irqsave(&ictx->kc_lock, flags);
1499 ictx->kc = KEY_UNKNOWN;
1500 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1501 return;
1502 }
1503 buf[2] = dir & 0xFF;
1504 buf[3] = (dir >> 8) & 0xFF;
1505 scancode = be32_to_cpu(*((__be32 *)buf));
1506 } else {
1507 /*
1508 * Hack alert: instead of using keycodes, we have
1509 * to use hard-coded scancodes here...
1510 */
1511 if (abs(rel_y) > abs(rel_x)) {
1512 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1513 buf[3] = 0;
1514 if (rel_y > 0)
1515 scancode = 0x01007f00; /* KEY_DOWN */
1516 else
1517 scancode = 0x01008000; /* KEY_UP */
1518 } else {
1519 buf[2] = 0;
1520 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1521 if (rel_x > 0)
1522 scancode = 0x0100007f; /* KEY_RIGHT */
1523 else
1524 scancode = 0x01000080; /* KEY_LEFT */
1525 }
1526 }
1527 }
1528
1529 if (scancode) {
1530 spin_lock_irqsave(&ictx->kc_lock, flags);
1531 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1532 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1533 }
1534 }
1535
1536 /**
1537 * figure out if these is a press or a release. We don't actually
1538 * care about repeats, as those will be auto-generated within the IR
1539 * subsystem for repeating scancodes.
1540 */
1541 static int imon_parse_press_type(struct imon_context *ictx,
1542 unsigned char *buf, u8 ktype)
1543 {
1544 int press_type = 0;
1545 unsigned long flags;
1546
1547 spin_lock_irqsave(&ictx->kc_lock, flags);
1548
1549 /* key release of 0x02XXXXXX key */
1550 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1551 ictx->kc = ictx->last_keycode;
1552
1553 /* mouse button release on (some) 0xffdc devices */
1554 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1555 buf[2] == 0x81 && buf[3] == 0xb7)
1556 ictx->kc = ictx->last_keycode;
1557
1558 /* mouse button release on (some other) 0xffdc devices */
1559 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1560 buf[2] == 0x81 && buf[3] == 0xb7)
1561 ictx->kc = ictx->last_keycode;
1562
1563 /* mce-specific button handling, no keyup events */
1564 else if (ktype == IMON_KEY_MCE) {
1565 ictx->rc_toggle = buf[2];
1566 press_type = 1;
1567
1568 /* incoherent or irrelevant data */
1569 } else if (ictx->kc == KEY_RESERVED)
1570 press_type = -EINVAL;
1571
1572 /* key release of 0xXXXXXXb7 key */
1573 else if (ictx->release_code)
1574 press_type = 0;
1575
1576 /* this is a button press */
1577 else
1578 press_type = 1;
1579
1580 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1581
1582 return press_type;
1583 }
1584
1585 /**
1586 * Process the incoming packet
1587 */
1588 static void imon_incoming_packet(struct imon_context *ictx,
1589 struct urb *urb, int intf)
1590 {
1591 int len = urb->actual_length;
1592 unsigned char *buf = urb->transfer_buffer;
1593 struct device *dev = ictx->dev;
1594 unsigned long flags;
1595 u32 kc;
1596 int i;
1597 u64 scancode;
1598 int press_type = 0;
1599 int msec;
1600 struct timeval t;
1601 static struct timeval prev_time = { 0, 0 };
1602 u8 ktype;
1603
1604 /* filter out junk data on the older 0xffdc imon devices */
1605 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1606 return;
1607
1608 /* Figure out what key was pressed */
1609 if (len == 8 && buf[7] == 0xee) {
1610 scancode = be64_to_cpu(*((__be64 *)buf));
1611 ktype = IMON_KEY_PANEL;
1612 kc = imon_panel_key_lookup(ictx, scancode);
1613 ictx->release_code = false;
1614 } else {
1615 scancode = be32_to_cpu(*((__be32 *)buf));
1616 if (ictx->rc_type == RC_BIT_RC6_MCE) {
1617 ktype = IMON_KEY_IMON;
1618 if (buf[0] == 0x80)
1619 ktype = IMON_KEY_MCE;
1620 kc = imon_mce_key_lookup(ictx, scancode);
1621 } else {
1622 ktype = IMON_KEY_IMON;
1623 kc = imon_remote_key_lookup(ictx, scancode);
1624 }
1625 }
1626
1627 spin_lock_irqsave(&ictx->kc_lock, flags);
1628 /* keyboard/mouse mode toggle button */
1629 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1630 ictx->last_keycode = kc;
1631 if (!nomouse) {
1632 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1633 dev_dbg(dev, "toggling to %s mode\n",
1634 ictx->pad_mouse ? "mouse" : "keyboard");
1635 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1636 return;
1637 } else {
1638 ictx->pad_mouse = false;
1639 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1640 }
1641 }
1642
1643 ictx->kc = kc;
1644 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1645
1646 /* send touchscreen events through input subsystem if touchpad data */
1647 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1648 buf[7] == 0x86) {
1649 imon_touch_event(ictx, buf);
1650 return;
1651
1652 /* look for mouse events with pad in mouse mode */
1653 } else if (ictx->pad_mouse) {
1654 if (imon_mouse_event(ictx, buf, len))
1655 return;
1656 }
1657
1658 /* Now for some special handling to convert pad input to arrow keys */
1659 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1660 ((len == 8) && (buf[0] & 0x40) &&
1661 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1662 len = 8;
1663 imon_pad_to_keys(ictx, buf);
1664 }
1665
1666 if (debug) {
1667 printk(KERN_INFO "intf%d decoded packet: ", intf);
1668 for (i = 0; i < len; ++i)
1669 printk("%02x ", buf[i]);
1670 printk("\n");
1671 }
1672
1673 press_type = imon_parse_press_type(ictx, buf, ktype);
1674 if (press_type < 0)
1675 goto not_input_data;
1676
1677 if (ktype != IMON_KEY_PANEL) {
1678 if (press_type == 0)
1679 rc_keyup(ictx->rdev);
1680 else {
1681 if (ictx->rc_type == RC_BIT_RC6_MCE)
1682 rc_keydown(ictx->rdev,
1683 ictx->rc_type == RC_BIT_RC6_MCE ? RC_TYPE_RC6_MCE : RC_TYPE_OTHER,
1684 ictx->rc_scancode, ictx->rc_toggle);
1685 spin_lock_irqsave(&ictx->kc_lock, flags);
1686 ictx->last_keycode = ictx->kc;
1687 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1688 }
1689 return;
1690 }
1691
1692 /* Only panel type events left to process now */
1693 spin_lock_irqsave(&ictx->kc_lock, flags);
1694
1695 do_gettimeofday(&t);
1696 /* KEY_MUTE repeats from knob need to be suppressed */
1697 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1698 msec = tv2int(&t, &prev_time);
1699 if (msec < ictx->idev->rep[REP_DELAY]) {
1700 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1701 return;
1702 }
1703 }
1704 prev_time = t;
1705 kc = ictx->kc;
1706
1707 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1708
1709 input_report_key(ictx->idev, kc, press_type);
1710 input_sync(ictx->idev);
1711
1712 /* panel keys don't generate a release */
1713 input_report_key(ictx->idev, kc, 0);
1714 input_sync(ictx->idev);
1715
1716 spin_lock_irqsave(&ictx->kc_lock, flags);
1717 ictx->last_keycode = kc;
1718 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1719
1720 return;
1721
1722 not_input_data:
1723 if (len != 8) {
1724 dev_warn(dev, "imon %s: invalid incoming packet "
1725 "size (len = %d, intf%d)\n", __func__, len, intf);
1726 return;
1727 }
1728
1729 /* iMON 2.4G associate frame */
1730 if (buf[0] == 0x00 &&
1731 buf[2] == 0xFF && /* REFID */
1732 buf[3] == 0xFF &&
1733 buf[4] == 0xFF &&
1734 buf[5] == 0xFF && /* iMON 2.4G */
1735 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1736 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1737 dev_warn(dev, "%s: remote associated refid=%02X\n",
1738 __func__, buf[1]);
1739 ictx->rf_isassociating = false;
1740 }
1741 }
1742
1743 /**
1744 * Callback function for USB core API: receive data
1745 */
1746 static void usb_rx_callback_intf0(struct urb *urb)
1747 {
1748 struct imon_context *ictx;
1749 int intfnum = 0;
1750
1751 if (!urb)
1752 return;
1753
1754 ictx = (struct imon_context *)urb->context;
1755 if (!ictx)
1756 return;
1757
1758 /*
1759 * if we get a callback before we're done configuring the hardware, we
1760 * can't yet process the data, as there's nowhere to send it, but we
1761 * still need to submit a new rx URB to avoid wedging the hardware
1762 */
1763 if (!ictx->dev_present_intf0)
1764 goto out;
1765
1766 switch (urb->status) {
1767 case -ENOENT: /* usbcore unlink successful! */
1768 return;
1769
1770 case -ESHUTDOWN: /* transport endpoint was shut down */
1771 break;
1772
1773 case 0:
1774 imon_incoming_packet(ictx, urb, intfnum);
1775 break;
1776
1777 default:
1778 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1779 __func__, urb->status);
1780 break;
1781 }
1782
1783 out:
1784 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1785 }
1786
1787 static void usb_rx_callback_intf1(struct urb *urb)
1788 {
1789 struct imon_context *ictx;
1790 int intfnum = 1;
1791
1792 if (!urb)
1793 return;
1794
1795 ictx = (struct imon_context *)urb->context;
1796 if (!ictx)
1797 return;
1798
1799 /*
1800 * if we get a callback before we're done configuring the hardware, we
1801 * can't yet process the data, as there's nowhere to send it, but we
1802 * still need to submit a new rx URB to avoid wedging the hardware
1803 */
1804 if (!ictx->dev_present_intf1)
1805 goto out;
1806
1807 switch (urb->status) {
1808 case -ENOENT: /* usbcore unlink successful! */
1809 return;
1810
1811 case -ESHUTDOWN: /* transport endpoint was shut down */
1812 break;
1813
1814 case 0:
1815 imon_incoming_packet(ictx, urb, intfnum);
1816 break;
1817
1818 default:
1819 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1820 __func__, urb->status);
1821 break;
1822 }
1823
1824 out:
1825 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1826 }
1827
1828 /*
1829 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1830 * devices, and all of them constantly spew interrupts, even when there
1831 * is no actual data to report. However, byte 6 of this buffer looks like
1832 * its unique across device variants, so we're trying to key off that to
1833 * figure out which display type (if any) and what IR protocol the device
1834 * actually supports. These devices have their IR protocol hard-coded into
1835 * their firmware, they can't be changed on the fly like the newer hardware.
1836 */
1837 static void imon_get_ffdc_type(struct imon_context *ictx)
1838 {
1839 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1840 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1841 u64 allowed_protos = RC_BIT_OTHER;
1842
1843 switch (ffdc_cfg_byte) {
1844 /* iMON Knob, no display, iMON IR + vol knob */
1845 case 0x21:
1846 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1847 ictx->display_supported = false;
1848 break;
1849 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1850 case 0x4e:
1851 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1852 ictx->display_supported = false;
1853 ictx->rf_device = true;
1854 break;
1855 /* iMON VFD, no IR (does have vol knob tho) */
1856 case 0x35:
1857 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1858 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1859 break;
1860 /* iMON VFD, iMON IR */
1861 case 0x24:
1862 case 0x85:
1863 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1864 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1865 break;
1866 /* iMON VFD, MCE IR */
1867 case 0x46:
1868 case 0x7e:
1869 case 0x9e:
1870 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1871 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1872 allowed_protos = RC_BIT_RC6_MCE;
1873 break;
1874 /* iMON LCD, MCE IR */
1875 case 0x9f:
1876 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1877 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1878 allowed_protos = RC_BIT_RC6_MCE;
1879 break;
1880 default:
1881 dev_info(ictx->dev, "Unknown 0xffdc device, "
1882 "defaulting to VFD and iMON IR");
1883 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1884 /* We don't know which one it is, allow user to set the
1885 * RC6 one from userspace if OTHER wasn't correct. */
1886 allowed_protos |= RC_BIT_RC6_MCE;
1887 break;
1888 }
1889
1890 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1891
1892 ictx->display_type = detected_display_type;
1893 ictx->rc_type = allowed_protos;
1894 }
1895
1896 static void imon_set_display_type(struct imon_context *ictx)
1897 {
1898 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1899
1900 /*
1901 * Try to auto-detect the type of display if the user hasn't set
1902 * it by hand via the display_type modparam. Default is VFD.
1903 */
1904
1905 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1906 switch (ictx->product) {
1907 case 0xffdc:
1908 /* set in imon_get_ffdc_type() */
1909 configured_display_type = ictx->display_type;
1910 break;
1911 case 0x0034:
1912 case 0x0035:
1913 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1914 break;
1915 case 0x0038:
1916 case 0x0039:
1917 case 0x0045:
1918 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1919 break;
1920 case 0x003c:
1921 case 0x0041:
1922 case 0x0042:
1923 case 0x0043:
1924 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1925 ictx->display_supported = false;
1926 break;
1927 case 0x0036:
1928 case 0x0044:
1929 default:
1930 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1931 break;
1932 }
1933 } else {
1934 configured_display_type = display_type;
1935 if (display_type == IMON_DISPLAY_TYPE_NONE)
1936 ictx->display_supported = false;
1937 else
1938 ictx->display_supported = true;
1939 dev_info(ictx->dev, "%s: overriding display type to %d via "
1940 "modparam\n", __func__, display_type);
1941 }
1942
1943 ictx->display_type = configured_display_type;
1944 }
1945
1946 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1947 {
1948 struct rc_dev *rdev;
1949 int ret;
1950 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
1951 0x00, 0x00, 0x00, 0x88 };
1952
1953 rdev = rc_allocate_device();
1954 if (!rdev) {
1955 dev_err(ictx->dev, "remote control dev allocation failed\n");
1956 goto out;
1957 }
1958
1959 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1960 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1961 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1962 sizeof(ictx->phys_rdev));
1963 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1964
1965 rdev->input_name = ictx->name_rdev;
1966 rdev->input_phys = ictx->phys_rdev;
1967 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
1968 rdev->dev.parent = ictx->dev;
1969
1970 rdev->priv = ictx;
1971 rdev->driver_type = RC_DRIVER_SCANCODE;
1972 rdev->allowed_protocols = RC_BIT_OTHER | RC_BIT_RC6_MCE; /* iMON PAD or MCE */
1973 rdev->change_protocol = imon_ir_change_protocol;
1974 rdev->driver_name = MOD_NAME;
1975
1976 /* Enable front-panel buttons and/or knobs */
1977 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1978 ret = send_packet(ictx);
1979 /* Not fatal, but warn about it */
1980 if (ret)
1981 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1982
1983 if (ictx->product == 0xffdc) {
1984 imon_get_ffdc_type(ictx);
1985 rdev->allowed_protocols = ictx->rc_type;
1986 }
1987
1988 imon_set_display_type(ictx);
1989
1990 if (ictx->rc_type == RC_BIT_RC6_MCE)
1991 rdev->map_name = RC_MAP_IMON_MCE;
1992 else
1993 rdev->map_name = RC_MAP_IMON_PAD;
1994
1995 ret = rc_register_device(rdev);
1996 if (ret < 0) {
1997 dev_err(ictx->dev, "remote input dev register failed\n");
1998 goto out;
1999 }
2000
2001 return rdev;
2002
2003 out:
2004 rc_free_device(rdev);
2005 return NULL;
2006 }
2007
2008 static struct input_dev *imon_init_idev(struct imon_context *ictx)
2009 {
2010 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table;
2011 struct input_dev *idev;
2012 int ret, i;
2013
2014 idev = input_allocate_device();
2015 if (!idev)
2016 goto out;
2017
2018 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
2019 "iMON Panel, Knob and Mouse(%04x:%04x)",
2020 ictx->vendor, ictx->product);
2021 idev->name = ictx->name_idev;
2022
2023 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
2024 sizeof(ictx->phys_idev));
2025 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
2026 idev->phys = ictx->phys_idev;
2027
2028 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
2029
2030 idev->keybit[BIT_WORD(BTN_MOUSE)] =
2031 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2032 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
2033 BIT_MASK(REL_WHEEL);
2034
2035 /* panel and/or knob code support */
2036 for (i = 0; key_table[i].hw_code != 0; i++) {
2037 u32 kc = key_table[i].keycode;
2038 __set_bit(kc, idev->keybit);
2039 }
2040
2041 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
2042 idev->dev.parent = ictx->dev;
2043 input_set_drvdata(idev, ictx);
2044
2045 ret = input_register_device(idev);
2046 if (ret < 0) {
2047 dev_err(ictx->dev, "input dev register failed\n");
2048 goto out;
2049 }
2050
2051 return idev;
2052
2053 out:
2054 input_free_device(idev);
2055 return NULL;
2056 }
2057
2058 static struct input_dev *imon_init_touch(struct imon_context *ictx)
2059 {
2060 struct input_dev *touch;
2061 int ret;
2062
2063 touch = input_allocate_device();
2064 if (!touch)
2065 goto touch_alloc_failed;
2066
2067 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
2068 "iMON USB Touchscreen (%04x:%04x)",
2069 ictx->vendor, ictx->product);
2070 touch->name = ictx->name_touch;
2071
2072 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
2073 sizeof(ictx->phys_touch));
2074 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
2075 touch->phys = ictx->phys_touch;
2076
2077 touch->evbit[0] =
2078 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
2079 touch->keybit[BIT_WORD(BTN_TOUCH)] =
2080 BIT_MASK(BTN_TOUCH);
2081 input_set_abs_params(touch, ABS_X,
2082 0x00, 0xfff, 0, 0);
2083 input_set_abs_params(touch, ABS_Y,
2084 0x00, 0xfff, 0, 0);
2085
2086 input_set_drvdata(touch, ictx);
2087
2088 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
2089 touch->dev.parent = ictx->dev;
2090 ret = input_register_device(touch);
2091 if (ret < 0) {
2092 dev_info(ictx->dev, "touchscreen input dev register failed\n");
2093 goto touch_register_failed;
2094 }
2095
2096 return touch;
2097
2098 touch_register_failed:
2099 input_free_device(touch);
2100
2101 touch_alloc_failed:
2102 return NULL;
2103 }
2104
2105 static bool imon_find_endpoints(struct imon_context *ictx,
2106 struct usb_host_interface *iface_desc)
2107 {
2108 struct usb_endpoint_descriptor *ep;
2109 struct usb_endpoint_descriptor *rx_endpoint = NULL;
2110 struct usb_endpoint_descriptor *tx_endpoint = NULL;
2111 int ifnum = iface_desc->desc.bInterfaceNumber;
2112 int num_endpts = iface_desc->desc.bNumEndpoints;
2113 int i, ep_dir, ep_type;
2114 bool ir_ep_found = false;
2115 bool display_ep_found = false;
2116 bool tx_control = false;
2117
2118 /*
2119 * Scan the endpoint list and set:
2120 * first input endpoint = IR endpoint
2121 * first output endpoint = display endpoint
2122 */
2123 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2124 ep = &iface_desc->endpoint[i].desc;
2125 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2126 ep_type = usb_endpoint_type(ep);
2127
2128 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2129 ep_type == USB_ENDPOINT_XFER_INT) {
2130
2131 rx_endpoint = ep;
2132 ir_ep_found = true;
2133 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2134
2135 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2136 ep_type == USB_ENDPOINT_XFER_INT) {
2137 tx_endpoint = ep;
2138 display_ep_found = true;
2139 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2140 }
2141 }
2142
2143 if (ifnum == 0) {
2144 ictx->rx_endpoint_intf0 = rx_endpoint;
2145 /*
2146 * tx is used to send characters to lcd/vfd, associate RF
2147 * remotes, set IR protocol, and maybe more...
2148 */
2149 ictx->tx_endpoint = tx_endpoint;
2150 } else {
2151 ictx->rx_endpoint_intf1 = rx_endpoint;
2152 }
2153
2154 /*
2155 * If we didn't find a display endpoint, this is probably one of the
2156 * newer iMON devices that use control urb instead of interrupt
2157 */
2158 if (!display_ep_found) {
2159 tx_control = true;
2160 display_ep_found = true;
2161 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
2162 "interface OUT endpoint\n", __func__);
2163 }
2164
2165 /*
2166 * Some iMON receivers have no display. Unfortunately, it seems
2167 * that SoundGraph recycles device IDs between devices both with
2168 * and without... :\
2169 */
2170 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2171 display_ep_found = false;
2172 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2173 }
2174
2175 /*
2176 * iMON Touch devices have a VGA touchscreen, but no "display", as
2177 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2178 */
2179 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2180 display_ep_found = false;
2181 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2182 }
2183
2184 /* Input endpoint is mandatory */
2185 if (!ir_ep_found)
2186 pr_err("no valid input (IR) endpoint found\n");
2187
2188 ictx->tx_control = tx_control;
2189
2190 if (display_ep_found)
2191 ictx->display_supported = true;
2192
2193 return ir_ep_found;
2194
2195 }
2196
2197 static struct imon_context *imon_init_intf0(struct usb_interface *intf,
2198 const struct usb_device_id *id)
2199 {
2200 struct imon_context *ictx;
2201 struct urb *rx_urb;
2202 struct urb *tx_urb;
2203 struct device *dev = &intf->dev;
2204 struct usb_host_interface *iface_desc;
2205 int ret = -ENOMEM;
2206
2207 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
2208 if (!ictx) {
2209 dev_err(dev, "%s: kzalloc failed for context", __func__);
2210 goto exit;
2211 }
2212 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2213 if (!rx_urb) {
2214 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
2215 goto rx_urb_alloc_failed;
2216 }
2217 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2218 if (!tx_urb) {
2219 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
2220 __func__);
2221 goto tx_urb_alloc_failed;
2222 }
2223
2224 mutex_init(&ictx->lock);
2225 spin_lock_init(&ictx->kc_lock);
2226
2227 mutex_lock(&ictx->lock);
2228
2229 ictx->dev = dev;
2230 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2231 ictx->rx_urb_intf0 = rx_urb;
2232 ictx->tx_urb = tx_urb;
2233 ictx->rf_device = false;
2234
2235 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2236 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2237
2238 /* save drive info for later accessing the panel/knob key table */
2239 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info;
2240 /* default send_packet delay is 5ms but some devices need more */
2241 ictx->send_packet_delay = ictx->dev_descr->flags &
2242 IMON_NEED_20MS_PKT_DELAY ? 20 : 5;
2243
2244 ret = -ENODEV;
2245 iface_desc = intf->cur_altsetting;
2246 if (!imon_find_endpoints(ictx, iface_desc)) {
2247 goto find_endpoint_failed;
2248 }
2249
2250 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2251 usb_rcvintpipe(ictx->usbdev_intf0,
2252 ictx->rx_endpoint_intf0->bEndpointAddress),
2253 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2254 usb_rx_callback_intf0, ictx,
2255 ictx->rx_endpoint_intf0->bInterval);
2256
2257 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2258 if (ret) {
2259 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2260 goto urb_submit_failed;
2261 }
2262
2263 ictx->idev = imon_init_idev(ictx);
2264 if (!ictx->idev) {
2265 dev_err(dev, "%s: input device setup failed\n", __func__);
2266 goto idev_setup_failed;
2267 }
2268
2269 ictx->rdev = imon_init_rdev(ictx);
2270 if (!ictx->rdev) {
2271 dev_err(dev, "%s: rc device setup failed\n", __func__);
2272 goto rdev_setup_failed;
2273 }
2274
2275 ictx->dev_present_intf0 = true;
2276
2277 mutex_unlock(&ictx->lock);
2278 return ictx;
2279
2280 rdev_setup_failed:
2281 input_unregister_device(ictx->idev);
2282 idev_setup_failed:
2283 usb_kill_urb(ictx->rx_urb_intf0);
2284 urb_submit_failed:
2285 find_endpoint_failed:
2286 usb_put_dev(ictx->usbdev_intf0);
2287 mutex_unlock(&ictx->lock);
2288 usb_free_urb(tx_urb);
2289 tx_urb_alloc_failed:
2290 usb_free_urb(rx_urb);
2291 rx_urb_alloc_failed:
2292 kfree(ictx);
2293 exit:
2294 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2295
2296 return NULL;
2297 }
2298
2299 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2300 struct imon_context *ictx)
2301 {
2302 struct urb *rx_urb;
2303 struct usb_host_interface *iface_desc;
2304 int ret = -ENOMEM;
2305
2306 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2307 if (!rx_urb) {
2308 pr_err("usb_alloc_urb failed for IR urb\n");
2309 goto rx_urb_alloc_failed;
2310 }
2311
2312 mutex_lock(&ictx->lock);
2313
2314 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2315 init_timer(&ictx->ttimer);
2316 ictx->ttimer.data = (unsigned long)ictx;
2317 ictx->ttimer.function = imon_touch_display_timeout;
2318 }
2319
2320 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2321 ictx->rx_urb_intf1 = rx_urb;
2322
2323 ret = -ENODEV;
2324 iface_desc = intf->cur_altsetting;
2325 if (!imon_find_endpoints(ictx, iface_desc))
2326 goto find_endpoint_failed;
2327
2328 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2329 ictx->touch = imon_init_touch(ictx);
2330 if (!ictx->touch)
2331 goto touch_setup_failed;
2332 } else
2333 ictx->touch = NULL;
2334
2335 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2336 usb_rcvintpipe(ictx->usbdev_intf1,
2337 ictx->rx_endpoint_intf1->bEndpointAddress),
2338 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2339 usb_rx_callback_intf1, ictx,
2340 ictx->rx_endpoint_intf1->bInterval);
2341
2342 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2343
2344 if (ret) {
2345 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2346 goto urb_submit_failed;
2347 }
2348
2349 ictx->dev_present_intf1 = true;
2350
2351 mutex_unlock(&ictx->lock);
2352 return ictx;
2353
2354 urb_submit_failed:
2355 if (ictx->touch)
2356 input_unregister_device(ictx->touch);
2357 touch_setup_failed:
2358 find_endpoint_failed:
2359 usb_put_dev(ictx->usbdev_intf1);
2360 mutex_unlock(&ictx->lock);
2361 usb_free_urb(rx_urb);
2362 rx_urb_alloc_failed:
2363 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
2364
2365 return NULL;
2366 }
2367
2368 static void imon_init_display(struct imon_context *ictx,
2369 struct usb_interface *intf)
2370 {
2371 int ret;
2372
2373 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2374
2375 /* set up sysfs entry for built-in clock */
2376 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2377 if (ret)
2378 dev_err(ictx->dev, "Could not create display sysfs "
2379 "entries(%d)", ret);
2380
2381 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2382 ret = usb_register_dev(intf, &imon_lcd_class);
2383 else
2384 ret = usb_register_dev(intf, &imon_vfd_class);
2385 if (ret)
2386 /* Not a fatal error, so ignore */
2387 dev_info(ictx->dev, "could not get a minor number for "
2388 "display\n");
2389
2390 }
2391
2392 /**
2393 * Callback function for USB core API: Probe
2394 */
2395 static int imon_probe(struct usb_interface *interface,
2396 const struct usb_device_id *id)
2397 {
2398 struct usb_device *usbdev = NULL;
2399 struct usb_host_interface *iface_desc = NULL;
2400 struct usb_interface *first_if;
2401 struct device *dev = &interface->dev;
2402 int ifnum, sysfs_err;
2403 int ret = 0;
2404 struct imon_context *ictx = NULL;
2405 struct imon_context *first_if_ctx = NULL;
2406 u16 vendor, product;
2407
2408 usbdev = usb_get_dev(interface_to_usbdev(interface));
2409 iface_desc = interface->cur_altsetting;
2410 ifnum = iface_desc->desc.bInterfaceNumber;
2411 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2412 product = le16_to_cpu(usbdev->descriptor.idProduct);
2413
2414 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2415 __func__, vendor, product, ifnum);
2416
2417 /* prevent races probing devices w/multiple interfaces */
2418 mutex_lock(&driver_lock);
2419
2420 first_if = usb_ifnum_to_if(usbdev, 0);
2421 first_if_ctx = usb_get_intfdata(first_if);
2422
2423 if (ifnum == 0) {
2424 ictx = imon_init_intf0(interface, id);
2425 if (!ictx) {
2426 pr_err("failed to initialize context!\n");
2427 ret = -ENODEV;
2428 goto fail;
2429 }
2430
2431 } else {
2432 /* this is the secondary interface on the device */
2433
2434 /* fail early if first intf failed to register */
2435 if (!first_if_ctx) {
2436 ret = -ENODEV;
2437 goto fail;
2438 }
2439
2440 ictx = imon_init_intf1(interface, first_if_ctx);
2441 if (!ictx) {
2442 pr_err("failed to attach to context!\n");
2443 ret = -ENODEV;
2444 goto fail;
2445 }
2446
2447 }
2448
2449 usb_set_intfdata(interface, ictx);
2450
2451 if (ifnum == 0) {
2452 mutex_lock(&ictx->lock);
2453
2454 if (product == 0xffdc && ictx->rf_device) {
2455 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2456 &imon_rf_attr_group);
2457 if (sysfs_err)
2458 pr_err("Could not create RF sysfs entries(%d)\n",
2459 sysfs_err);
2460 }
2461
2462 if (ictx->display_supported)
2463 imon_init_display(ictx, interface);
2464
2465 mutex_unlock(&ictx->lock);
2466 }
2467
2468 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2469 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2470 usbdev->bus->busnum, usbdev->devnum);
2471
2472 mutex_unlock(&driver_lock);
2473 usb_put_dev(usbdev);
2474
2475 return 0;
2476
2477 fail:
2478 mutex_unlock(&driver_lock);
2479 usb_put_dev(usbdev);
2480 dev_err(dev, "unable to register, err %d\n", ret);
2481
2482 return ret;
2483 }
2484
2485 /**
2486 * Callback function for USB core API: disconnect
2487 */
2488 static void imon_disconnect(struct usb_interface *interface)
2489 {
2490 struct imon_context *ictx;
2491 struct device *dev;
2492 int ifnum;
2493
2494 /* prevent races with multi-interface device probing and display_open */
2495 mutex_lock(&driver_lock);
2496
2497 ictx = usb_get_intfdata(interface);
2498 dev = ictx->dev;
2499 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2500
2501 /*
2502 * sysfs_remove_group is safe to call even if sysfs_create_group
2503 * hasn't been called
2504 */
2505 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2506 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2507
2508 usb_set_intfdata(interface, NULL);
2509
2510 /* Abort ongoing write */
2511 if (ictx->tx.busy) {
2512 usb_kill_urb(ictx->tx_urb);
2513 complete_all(&ictx->tx.finished);
2514 }
2515
2516 if (ifnum == 0) {
2517 ictx->dev_present_intf0 = false;
2518 usb_kill_urb(ictx->rx_urb_intf0);
2519 usb_put_dev(ictx->usbdev_intf0);
2520 input_unregister_device(ictx->idev);
2521 rc_unregister_device(ictx->rdev);
2522 if (ictx->display_supported) {
2523 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2524 usb_deregister_dev(interface, &imon_lcd_class);
2525 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
2526 usb_deregister_dev(interface, &imon_vfd_class);
2527 }
2528 } else {
2529 ictx->dev_present_intf1 = false;
2530 usb_kill_urb(ictx->rx_urb_intf1);
2531 usb_put_dev(ictx->usbdev_intf1);
2532 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2533 input_unregister_device(ictx->touch);
2534 del_timer_sync(&ictx->ttimer);
2535 }
2536 }
2537
2538 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1)
2539 free_imon_context(ictx);
2540
2541 mutex_unlock(&driver_lock);
2542
2543 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2544 __func__, ifnum);
2545 }
2546
2547 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2548 {
2549 struct imon_context *ictx = usb_get_intfdata(intf);
2550 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2551
2552 if (ifnum == 0)
2553 usb_kill_urb(ictx->rx_urb_intf0);
2554 else
2555 usb_kill_urb(ictx->rx_urb_intf1);
2556
2557 return 0;
2558 }
2559
2560 static int imon_resume(struct usb_interface *intf)
2561 {
2562 int rc = 0;
2563 struct imon_context *ictx = usb_get_intfdata(intf);
2564 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2565
2566 if (ifnum == 0) {
2567 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2568 usb_rcvintpipe(ictx->usbdev_intf0,
2569 ictx->rx_endpoint_intf0->bEndpointAddress),
2570 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2571 usb_rx_callback_intf0, ictx,
2572 ictx->rx_endpoint_intf0->bInterval);
2573
2574 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2575
2576 } else {
2577 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2578 usb_rcvintpipe(ictx->usbdev_intf1,
2579 ictx->rx_endpoint_intf1->bEndpointAddress),
2580 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2581 usb_rx_callback_intf1, ictx,
2582 ictx->rx_endpoint_intf1->bInterval);
2583
2584 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2585 }
2586
2587 return rc;
2588 }
2589
2590 module_usb_driver(imon_driver);
Linux kernel - Deliverables
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