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
25 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
26
27 #include <linux/errno.h>
28 #include <linux/init.h>
29 #include <linux/kernel.h>
30 #include <linux/ktime.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/uaccess.h>
34 #include <linux/ratelimit.h>
35
36 #include <linux/input.h>
37 #include <linux/usb.h>
38 #include <linux/usb/input.h>
39 #include <media/rc-core.h>
40
41 #include <linux/timer.h>
42
43 #define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
44 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
45 #define MOD_NAME "imon"
46 #define MOD_VERSION "0.9.4"
47
48 #define DISPLAY_MINOR_BASE 144
49 #define DEVICE_NAME "lcd%d"
50
51 #define BUF_CHUNK_SIZE 8
52 #define BUF_SIZE 128
53
54 #define BIT_DURATION 250 /* each bit received is 250us */
55
56 #define IMON_CLOCK_ENABLE_PACKETS 2
57
58 /*** P R O T O T Y P E S ***/
59
60 /* USB Callback prototypes */
61 static int imon_probe(struct usb_interface *interface,
62 const struct usb_device_id *id);
63 static void imon_disconnect(struct usb_interface *interface);
64 static void usb_rx_callback_intf0(struct urb *urb);
65 static void usb_rx_callback_intf1(struct urb *urb);
66 static void usb_tx_callback(struct urb *urb);
67
68 /* suspend/resume support */
69 static int imon_resume(struct usb_interface *intf);
70 static int imon_suspend(struct usb_interface *intf, pm_message_t message);
71
72 /* Display file_operations function prototypes */
73 static int display_open(struct inode *inode, struct file *file);
74 static int display_close(struct inode *inode, struct file *file);
75
76 /* VFD write operation */
77 static ssize_t vfd_write(struct file *file, const char __user *buf,
78 size_t n_bytes, loff_t *pos);
79
80 /* LCD file_operations override function prototypes */
81 static ssize_t lcd_write(struct file *file, const char __user *buf,
82 size_t n_bytes, loff_t *pos);
83
84 /*** G L O B A L S ***/
85
86 struct imon_panel_key_table {
87 u64 hw_code;
88 u32 keycode;
89 };
90
91 struct imon_usb_dev_descr {
92 __u16 flags;
93 #define IMON_NO_FLAGS 0
94 #define IMON_NEED_20MS_PKT_DELAY 1
95 struct imon_panel_key_table key_table[];
96 };
97
98 struct imon_context {
99 struct device *dev;
100 /* Newer devices have two interfaces */
101 struct usb_device *usbdev_intf0;
102 struct usb_device *usbdev_intf1;
103
104 bool display_supported; /* not all controllers do */
105 bool display_isopen; /* display port has been opened */
106 bool rf_device; /* true if iMON 2.4G LT/DT RF device */
107 bool rf_isassociating; /* RF remote associating */
108 bool dev_present_intf0; /* USB device presence, interface 0 */
109 bool dev_present_intf1; /* USB device presence, interface 1 */
110
111 struct mutex lock; /* to lock this object */
112 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
113
114 struct usb_endpoint_descriptor *rx_endpoint_intf0;
115 struct usb_endpoint_descriptor *rx_endpoint_intf1;
116 struct usb_endpoint_descriptor *tx_endpoint;
117 struct urb *rx_urb_intf0;
118 struct urb *rx_urb_intf1;
119 struct urb *tx_urb;
120 bool tx_control;
121 unsigned char usb_rx_buf[8];
122 unsigned char usb_tx_buf[8];
123 unsigned int send_packet_delay;
124
125 struct tx_t {
126 unsigned char data_buf[35]; /* user data buffer */
127 struct completion finished; /* wait for write to finish */
128 bool busy; /* write in progress */
129 int status; /* status of tx completion */
130 } tx;
131
132 u16 vendor; /* usb vendor ID */
133 u16 product; /* usb product ID */
134
135 struct rc_dev *rdev; /* rc-core device for remote */
136 struct input_dev *idev; /* input device for panel & IR mouse */
137 struct input_dev *touch; /* input device for touchscreen */
138
139 spinlock_t kc_lock; /* make sure we get keycodes right */
140 u32 kc; /* current input keycode */
141 u32 last_keycode; /* last reported input keycode */
142 u32 rc_scancode; /* the computed remote scancode */
143 u8 rc_toggle; /* the computed remote toggle bit */
144 u64 rc_proto; /* iMON or MCE (RC6) IR protocol? */
145 bool release_code; /* some keys send a release code */
146
147 u8 display_type; /* store the display type */
148 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
149
150 char name_rdev[128]; /* rc input device name */
151 char phys_rdev[64]; /* rc input device phys path */
152
153 char name_idev[128]; /* input device name */
154 char phys_idev[64]; /* input device phys path */
155
156 char name_touch[128]; /* touch screen name */
157 char phys_touch[64]; /* touch screen phys path */
158 struct timer_list ttimer; /* touch screen timer */
159 int touch_x; /* x coordinate on touchscreen */
160 int touch_y; /* y coordinate on touchscreen */
161 struct imon_usb_dev_descr *dev_descr; /* device description with key
162 table for front panels */
163 };
164
165 #define TOUCH_TIMEOUT (HZ/30)
166
167 /* vfd character device file operations */
168 static const struct file_operations vfd_fops = {
169 .owner = THIS_MODULE,
170 .open = &display_open,
171 .write = &vfd_write,
172 .release = &display_close,
173 .llseek = noop_llseek,
174 };
175
176 /* lcd character device file operations */
177 static const struct file_operations lcd_fops = {
178 .owner = THIS_MODULE,
179 .open = &display_open,
180 .write = &lcd_write,
181 .release = &display_close,
182 .llseek = noop_llseek,
183 };
184
185 enum {
186 IMON_DISPLAY_TYPE_AUTO = 0,
187 IMON_DISPLAY_TYPE_VFD = 1,
188 IMON_DISPLAY_TYPE_LCD = 2,
189 IMON_DISPLAY_TYPE_VGA = 3,
190 IMON_DISPLAY_TYPE_NONE = 4,
191 };
192
193 enum {
194 IMON_KEY_IMON = 0,
195 IMON_KEY_MCE = 1,
196 IMON_KEY_PANEL = 2,
197 };
198
199 static struct usb_class_driver imon_vfd_class = {
200 .name = DEVICE_NAME,
201 .fops = &vfd_fops,
202 .minor_base = DISPLAY_MINOR_BASE,
203 };
204
205 static struct usb_class_driver imon_lcd_class = {
206 .name = DEVICE_NAME,
207 .fops = &lcd_fops,
208 .minor_base = DISPLAY_MINOR_BASE,
209 };
210
211 /* imon receiver front panel/knob key table */
212 static const struct imon_usb_dev_descr imon_default_table = {
213 .flags = IMON_NO_FLAGS,
214 .key_table = {
215 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
216 { 0x000000001200ffeell, KEY_UP },
217 { 0x000000001300ffeell, KEY_DOWN },
218 { 0x000000001400ffeell, KEY_LEFT },
219 { 0x000000001500ffeell, KEY_RIGHT },
220 { 0x000000001600ffeell, KEY_ENTER },
221 { 0x000000001700ffeell, KEY_ESC },
222 { 0x000000001f00ffeell, KEY_AUDIO },
223 { 0x000000002000ffeell, KEY_VIDEO },
224 { 0x000000002100ffeell, KEY_CAMERA },
225 { 0x000000002700ffeell, KEY_DVD },
226 { 0x000000002300ffeell, KEY_TV },
227 { 0x000000002b00ffeell, KEY_EXIT },
228 { 0x000000002c00ffeell, KEY_SELECT },
229 { 0x000000002d00ffeell, KEY_MENU },
230 { 0x000000000500ffeell, KEY_PREVIOUS },
231 { 0x000000000700ffeell, KEY_REWIND },
232 { 0x000000000400ffeell, KEY_STOP },
233 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
234 { 0x000000000800ffeell, KEY_FASTFORWARD },
235 { 0x000000000600ffeell, KEY_NEXT },
236 { 0x000000010000ffeell, KEY_RIGHT },
237 { 0x000001000000ffeell, KEY_LEFT },
238 { 0x000000003d00ffeell, KEY_SELECT },
239 { 0x000100000000ffeell, KEY_VOLUMEUP },
240 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
241 { 0x000000000100ffeell, KEY_MUTE },
242 /* 0xffdc iMON MCE VFD */
243 { 0x00010000ffffffeell, KEY_VOLUMEUP },
244 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
245 { 0x00000001ffffffeell, KEY_MUTE },
246 { 0x0000000fffffffeell, KEY_MEDIA },
247 { 0x00000012ffffffeell, KEY_UP },
248 { 0x00000013ffffffeell, KEY_DOWN },
249 { 0x00000014ffffffeell, KEY_LEFT },
250 { 0x00000015ffffffeell, KEY_RIGHT },
251 { 0x00000016ffffffeell, KEY_ENTER },
252 { 0x00000017ffffffeell, KEY_ESC },
253 /* iMON Knob values */
254 { 0x000100ffffffffeell, KEY_VOLUMEUP },
255 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
256 { 0x000008ffffffffeell, KEY_MUTE },
257 { 0, KEY_RESERVED },
258 }
259 };
260
261 static const struct imon_usb_dev_descr imon_OEM_VFD = {
262 .flags = IMON_NEED_20MS_PKT_DELAY,
263 .key_table = {
264 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
265 { 0x000000001200ffeell, KEY_UP },
266 { 0x000000001300ffeell, KEY_DOWN },
267 { 0x000000001400ffeell, KEY_LEFT },
268 { 0x000000001500ffeell, KEY_RIGHT },
269 { 0x000000001600ffeell, KEY_ENTER },
270 { 0x000000001700ffeell, KEY_ESC },
271 { 0x000000001f00ffeell, KEY_AUDIO },
272 { 0x000000002b00ffeell, KEY_EXIT },
273 { 0x000000002c00ffeell, KEY_SELECT },
274 { 0x000000002d00ffeell, KEY_MENU },
275 { 0x000000000500ffeell, KEY_PREVIOUS },
276 { 0x000000000700ffeell, KEY_REWIND },
277 { 0x000000000400ffeell, KEY_STOP },
278 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
279 { 0x000000000800ffeell, KEY_FASTFORWARD },
280 { 0x000000000600ffeell, KEY_NEXT },
281 { 0x000000010000ffeell, KEY_RIGHT },
282 { 0x000001000000ffeell, KEY_LEFT },
283 { 0x000000003d00ffeell, KEY_SELECT },
284 { 0x000100000000ffeell, KEY_VOLUMEUP },
285 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
286 { 0x000000000100ffeell, KEY_MUTE },
287 /* 0xffdc iMON MCE VFD */
288 { 0x00010000ffffffeell, KEY_VOLUMEUP },
289 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
290 { 0x00000001ffffffeell, KEY_MUTE },
291 { 0x0000000fffffffeell, KEY_MEDIA },
292 { 0x00000012ffffffeell, KEY_UP },
293 { 0x00000013ffffffeell, KEY_DOWN },
294 { 0x00000014ffffffeell, KEY_LEFT },
295 { 0x00000015ffffffeell, KEY_RIGHT },
296 { 0x00000016ffffffeell, KEY_ENTER },
297 { 0x00000017ffffffeell, KEY_ESC },
298 /* iMON Knob values */
299 { 0x000100ffffffffeell, KEY_VOLUMEUP },
300 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
301 { 0x000008ffffffffeell, KEY_MUTE },
302 { 0, KEY_RESERVED },
303 }
304 };
305
306 /* imon receiver front panel/knob key table for DH102*/
307 static const struct imon_usb_dev_descr imon_DH102 = {
308 .flags = IMON_NO_FLAGS,
309 .key_table = {
310 { 0x000100000000ffeell, KEY_VOLUMEUP },
311 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
312 { 0x000000010000ffeell, KEY_MUTE },
313 { 0x0000000f0000ffeell, KEY_MEDIA },
314 { 0x000000120000ffeell, KEY_UP },
315 { 0x000000130000ffeell, KEY_DOWN },
316 { 0x000000140000ffeell, KEY_LEFT },
317 { 0x000000150000ffeell, KEY_RIGHT },
318 { 0x000000160000ffeell, KEY_ENTER },
319 { 0x000000170000ffeell, KEY_ESC },
320 { 0x0000002b0000ffeell, KEY_EXIT },
321 { 0x0000002c0000ffeell, KEY_SELECT },
322 { 0x0000002d0000ffeell, KEY_MENU },
323 { 0, KEY_RESERVED }
324 }
325 };
326
327 /*
328 * USB Device ID for iMON USB Control Boards
329 *
330 * The Windows drivers contain 6 different inf files, more or less one for
331 * each new device until the 0x0034-0x0046 devices, which all use the same
332 * driver. Some of the devices in the 34-46 range haven't been definitively
333 * identified yet. Early devices have either a TriGem Computer, Inc. or a
334 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
335 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
336 * the ffdc and later devices, which do onboard decoding.
337 */
338 static const struct usb_device_id imon_usb_id_table[] = {
339 /*
340 * Several devices with this same device ID, all use iMON_PAD.inf
341 * SoundGraph iMON PAD (IR & VFD)
342 * SoundGraph iMON PAD (IR & LCD)
343 * SoundGraph iMON Knob (IR only)
344 */
345 { USB_DEVICE(0x15c2, 0xffdc),
346 .driver_info = (unsigned long)&imon_default_table },
347
348 /*
349 * Newer devices, all driven by the latest iMON Windows driver, full
350 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
351 * Need user input to fill in details on unknown devices.
352 */
353 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
354 { USB_DEVICE(0x15c2, 0x0034),
355 .driver_info = (unsigned long)&imon_DH102 },
356 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
357 { USB_DEVICE(0x15c2, 0x0035),
358 .driver_info = (unsigned long)&imon_default_table},
359 /* SoundGraph iMON OEM VFD (IR & VFD) */
360 { USB_DEVICE(0x15c2, 0x0036),
361 .driver_info = (unsigned long)&imon_OEM_VFD },
362 /* device specifics unknown */
363 { USB_DEVICE(0x15c2, 0x0037),
364 .driver_info = (unsigned long)&imon_default_table},
365 /* SoundGraph iMON OEM LCD (IR & LCD) */
366 { USB_DEVICE(0x15c2, 0x0038),
367 .driver_info = (unsigned long)&imon_default_table},
368 /* SoundGraph iMON UltraBay (IR & LCD) */
369 { USB_DEVICE(0x15c2, 0x0039),
370 .driver_info = (unsigned long)&imon_default_table},
371 /* device specifics unknown */
372 { USB_DEVICE(0x15c2, 0x003a),
373 .driver_info = (unsigned long)&imon_default_table},
374 /* device specifics unknown */
375 { USB_DEVICE(0x15c2, 0x003b),
376 .driver_info = (unsigned long)&imon_default_table},
377 /* SoundGraph iMON OEM Inside (IR only) */
378 { USB_DEVICE(0x15c2, 0x003c),
379 .driver_info = (unsigned long)&imon_default_table},
380 /* device specifics unknown */
381 { USB_DEVICE(0x15c2, 0x003d),
382 .driver_info = (unsigned long)&imon_default_table},
383 /* device specifics unknown */
384 { USB_DEVICE(0x15c2, 0x003e),
385 .driver_info = (unsigned long)&imon_default_table},
386 /* device specifics unknown */
387 { USB_DEVICE(0x15c2, 0x003f),
388 .driver_info = (unsigned long)&imon_default_table},
389 /* device specifics unknown */
390 { USB_DEVICE(0x15c2, 0x0040),
391 .driver_info = (unsigned long)&imon_default_table},
392 /* SoundGraph iMON MINI (IR only) */
393 { USB_DEVICE(0x15c2, 0x0041),
394 .driver_info = (unsigned long)&imon_default_table},
395 /* Antec Veris Multimedia Station EZ External (IR only) */
396 { USB_DEVICE(0x15c2, 0x0042),
397 .driver_info = (unsigned long)&imon_default_table},
398 /* Antec Veris Multimedia Station Basic Internal (IR only) */
399 { USB_DEVICE(0x15c2, 0x0043),
400 .driver_info = (unsigned long)&imon_default_table},
401 /* Antec Veris Multimedia Station Elite (IR & VFD) */
402 { USB_DEVICE(0x15c2, 0x0044),
403 .driver_info = (unsigned long)&imon_default_table},
404 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
405 { USB_DEVICE(0x15c2, 0x0045),
406 .driver_info = (unsigned long)&imon_default_table},
407 /* device specifics unknown */
408 { USB_DEVICE(0x15c2, 0x0046),
409 .driver_info = (unsigned long)&imon_default_table},
410 {}
411 };
412
413 /* USB Device data */
414 static struct usb_driver imon_driver = {
415 .name = MOD_NAME,
416 .probe = imon_probe,
417 .disconnect = imon_disconnect,
418 .suspend = imon_suspend,
419 .resume = imon_resume,
420 .id_table = imon_usb_id_table,
421 };
422
423 /* to prevent races between open() and disconnect(), probing, etc */
424 static DEFINE_MUTEX(driver_lock);
425
426 /* Module bookkeeping bits */
427 MODULE_AUTHOR(MOD_AUTHOR);
428 MODULE_DESCRIPTION(MOD_DESC);
429 MODULE_VERSION(MOD_VERSION);
430 MODULE_LICENSE("GPL");
431 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
432
433 static bool debug;
434 module_param(debug, bool, S_IRUGO | S_IWUSR);
435 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
436
437 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
438 static int display_type;
439 module_param(display_type, int, S_IRUGO);
440 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
441
442 static int pad_stabilize = 1;
443 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
444 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD presses in arrow key mode. 0=disable, 1=enable (default).");
445
446 /*
447 * In certain use cases, mouse mode isn't really helpful, and could actually
448 * cause confusion, so allow disabling it when the IR device is open.
449 */
450 static bool nomouse;
451 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
452 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is open. 0=don't disable, 1=disable. (default: don't disable)");
453
454 /* threshold at which a pad push registers as an arrow key in kbd mode */
455 static int pad_thresh;
456 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
457 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)");
458
459
free_imon_context(struct imon_context * ictx)460 static void free_imon_context(struct imon_context *ictx)
461 {
462 struct device *dev = ictx->dev;
463
464 usb_free_urb(ictx->tx_urb);
465 usb_free_urb(ictx->rx_urb_intf0);
466 usb_free_urb(ictx->rx_urb_intf1);
467 kfree(ictx);
468
469 dev_dbg(dev, "%s: iMON context freed\n", __func__);
470 }
471
472 /*
473 * Called when the Display device (e.g. /dev/lcd0)
474 * is opened by the application.
475 */
display_open(struct inode * inode,struct file * file)476 static int display_open(struct inode *inode, struct file *file)
477 {
478 struct usb_interface *interface;
479 struct imon_context *ictx = NULL;
480 int subminor;
481 int retval = 0;
482
483 /* prevent races with disconnect */
484 mutex_lock(&driver_lock);
485
486 subminor = iminor(inode);
487 interface = usb_find_interface(&imon_driver, subminor);
488 if (!interface) {
489 pr_err("could not find interface for minor %d\n", subminor);
490 retval = -ENODEV;
491 goto exit;
492 }
493 ictx = usb_get_intfdata(interface);
494
495 if (!ictx) {
496 pr_err("no context found for minor %d\n", subminor);
497 retval = -ENODEV;
498 goto exit;
499 }
500
501 mutex_lock(&ictx->lock);
502
503 if (!ictx->display_supported) {
504 pr_err("display not supported by device\n");
505 retval = -ENODEV;
506 } else if (ictx->display_isopen) {
507 pr_err("display port is already open\n");
508 retval = -EBUSY;
509 } else {
510 ictx->display_isopen = true;
511 file->private_data = ictx;
512 dev_dbg(ictx->dev, "display port opened\n");
513 }
514
515 mutex_unlock(&ictx->lock);
516
517 exit:
518 mutex_unlock(&driver_lock);
519 return retval;
520 }
521
522 /*
523 * Called when the display device (e.g. /dev/lcd0)
524 * is closed by the application.
525 */
display_close(struct inode * inode,struct file * file)526 static int display_close(struct inode *inode, struct file *file)
527 {
528 struct imon_context *ictx = NULL;
529 int retval = 0;
530
531 ictx = file->private_data;
532
533 if (!ictx) {
534 pr_err("no context for device\n");
535 return -ENODEV;
536 }
537
538 mutex_lock(&ictx->lock);
539
540 if (!ictx->display_supported) {
541 pr_err("display not supported by device\n");
542 retval = -ENODEV;
543 } else if (!ictx->display_isopen) {
544 pr_err("display is not open\n");
545 retval = -EIO;
546 } else {
547 ictx->display_isopen = false;
548 dev_dbg(ictx->dev, "display port closed\n");
549 }
550
551 mutex_unlock(&ictx->lock);
552 return retval;
553 }
554
555 /*
556 * Sends a packet to the device -- this function must be called with
557 * ictx->lock held, or its unlock/lock sequence while waiting for tx
558 * to complete can/will lead to a deadlock.
559 */
send_packet(struct imon_context * ictx)560 static int send_packet(struct imon_context *ictx)
561 {
562 unsigned int pipe;
563 unsigned long timeout;
564 int interval = 0;
565 int retval = 0;
566 struct usb_ctrlrequest *control_req = NULL;
567
568 /* Check if we need to use control or interrupt urb */
569 if (!ictx->tx_control) {
570 pipe = usb_sndintpipe(ictx->usbdev_intf0,
571 ictx->tx_endpoint->bEndpointAddress);
572 interval = ictx->tx_endpoint->bInterval;
573
574 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
575 ictx->usb_tx_buf,
576 sizeof(ictx->usb_tx_buf),
577 usb_tx_callback, ictx, interval);
578
579 ictx->tx_urb->actual_length = 0;
580 } else {
581 /* fill request into kmalloc'ed space: */
582 control_req = kmalloc(sizeof(*control_req), GFP_KERNEL);
583 if (control_req == NULL)
584 return -ENOMEM;
585
586 /* setup packet is '21 09 0200 0001 0008' */
587 control_req->bRequestType = 0x21;
588 control_req->bRequest = 0x09;
589 control_req->wValue = cpu_to_le16(0x0200);
590 control_req->wIndex = cpu_to_le16(0x0001);
591 control_req->wLength = cpu_to_le16(0x0008);
592
593 /* control pipe is endpoint 0x00 */
594 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
595
596 /* build the control urb */
597 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
598 pipe, (unsigned char *)control_req,
599 ictx->usb_tx_buf,
600 sizeof(ictx->usb_tx_buf),
601 usb_tx_callback, ictx);
602 ictx->tx_urb->actual_length = 0;
603 }
604
605 reinit_completion(&ictx->tx.finished);
606 ictx->tx.busy = true;
607 smp_rmb(); /* ensure later readers know we're busy */
608
609 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
610 if (retval) {
611 ictx->tx.busy = false;
612 smp_rmb(); /* ensure later readers know we're not busy */
613 pr_err_ratelimited("error submitting urb(%d)\n", retval);
614 } else {
615 /* Wait for transmission to complete (or abort) */
616 mutex_unlock(&ictx->lock);
617 retval = wait_for_completion_interruptible(
618 &ictx->tx.finished);
619 if (retval) {
620 usb_kill_urb(ictx->tx_urb);
621 pr_err_ratelimited("task interrupted\n");
622 }
623 mutex_lock(&ictx->lock);
624
625 retval = ictx->tx.status;
626 if (retval)
627 pr_err_ratelimited("packet tx failed (%d)\n", retval);
628 }
629
630 kfree(control_req);
631
632 /*
633 * Induce a mandatory delay before returning, as otherwise,
634 * send_packet can get called so rapidly as to overwhelm the device,
635 * particularly on faster systems and/or those with quirky usb.
636 */
637 timeout = msecs_to_jiffies(ictx->send_packet_delay);
638 set_current_state(TASK_INTERRUPTIBLE);
639 schedule_timeout(timeout);
640
641 return retval;
642 }
643
644 /*
645 * Sends an associate packet to the iMON 2.4G.
646 *
647 * This might not be such a good idea, since it has an id collision with
648 * some versions of the "IR & VFD" combo. The only way to determine if it
649 * is an RF version is to look at the product description string. (Which
650 * we currently do not fetch).
651 */
send_associate_24g(struct imon_context * ictx)652 static int send_associate_24g(struct imon_context *ictx)
653 {
654 int retval;
655 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
656 0x00, 0x00, 0x00, 0x20 };
657
658 if (!ictx) {
659 pr_err("no context for device\n");
660 return -ENODEV;
661 }
662
663 if (!ictx->dev_present_intf0) {
664 pr_err("no iMON device present\n");
665 return -ENODEV;
666 }
667
668 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
669 retval = send_packet(ictx);
670
671 return retval;
672 }
673
674 /*
675 * Sends packets to setup and show clock on iMON display
676 *
677 * Arguments: year - last 2 digits of year, month - 1..12,
678 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
679 * hour - 0..23, minute - 0..59, second - 0..59
680 */
send_set_imon_clock(struct imon_context * ictx,unsigned int year,unsigned int month,unsigned int day,unsigned int dow,unsigned int hour,unsigned int minute,unsigned int second)681 static int send_set_imon_clock(struct imon_context *ictx,
682 unsigned int year, unsigned int month,
683 unsigned int day, unsigned int dow,
684 unsigned int hour, unsigned int minute,
685 unsigned int second)
686 {
687 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
688 int retval = 0;
689 int i;
690
691 if (!ictx) {
692 pr_err("no context for device\n");
693 return -ENODEV;
694 }
695
696 switch (ictx->display_type) {
697 case IMON_DISPLAY_TYPE_LCD:
698 clock_enable_pkt[0][0] = 0x80;
699 clock_enable_pkt[0][1] = year;
700 clock_enable_pkt[0][2] = month-1;
701 clock_enable_pkt[0][3] = day;
702 clock_enable_pkt[0][4] = hour;
703 clock_enable_pkt[0][5] = minute;
704 clock_enable_pkt[0][6] = second;
705
706 clock_enable_pkt[1][0] = 0x80;
707 clock_enable_pkt[1][1] = 0;
708 clock_enable_pkt[1][2] = 0;
709 clock_enable_pkt[1][3] = 0;
710 clock_enable_pkt[1][4] = 0;
711 clock_enable_pkt[1][5] = 0;
712 clock_enable_pkt[1][6] = 0;
713
714 if (ictx->product == 0xffdc) {
715 clock_enable_pkt[0][7] = 0x50;
716 clock_enable_pkt[1][7] = 0x51;
717 } else {
718 clock_enable_pkt[0][7] = 0x88;
719 clock_enable_pkt[1][7] = 0x8a;
720 }
721
722 break;
723
724 case IMON_DISPLAY_TYPE_VFD:
725 clock_enable_pkt[0][0] = year;
726 clock_enable_pkt[0][1] = month-1;
727 clock_enable_pkt[0][2] = day;
728 clock_enable_pkt[0][3] = dow;
729 clock_enable_pkt[0][4] = hour;
730 clock_enable_pkt[0][5] = minute;
731 clock_enable_pkt[0][6] = second;
732 clock_enable_pkt[0][7] = 0x40;
733
734 clock_enable_pkt[1][0] = 0;
735 clock_enable_pkt[1][1] = 0;
736 clock_enable_pkt[1][2] = 1;
737 clock_enable_pkt[1][3] = 0;
738 clock_enable_pkt[1][4] = 0;
739 clock_enable_pkt[1][5] = 0;
740 clock_enable_pkt[1][6] = 0;
741 clock_enable_pkt[1][7] = 0x42;
742
743 break;
744
745 default:
746 return -ENODEV;
747 }
748
749 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
750 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
751 retval = send_packet(ictx);
752 if (retval) {
753 pr_err("send_packet failed for packet %d\n", i);
754 break;
755 }
756 }
757
758 return retval;
759 }
760
761 /*
762 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
763 */
show_associate_remote(struct device * d,struct device_attribute * attr,char * buf)764 static ssize_t show_associate_remote(struct device *d,
765 struct device_attribute *attr,
766 char *buf)
767 {
768 struct imon_context *ictx = dev_get_drvdata(d);
769
770 if (!ictx)
771 return -ENODEV;
772
773 mutex_lock(&ictx->lock);
774 if (ictx->rf_isassociating)
775 strcpy(buf, "associating\n");
776 else
777 strcpy(buf, "closed\n");
778
779 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for instructions on how to associate your iMON 2.4G DT/LT remote\n");
780 mutex_unlock(&ictx->lock);
781 return strlen(buf);
782 }
783
store_associate_remote(struct device * d,struct device_attribute * attr,const char * buf,size_t count)784 static ssize_t store_associate_remote(struct device *d,
785 struct device_attribute *attr,
786 const char *buf, size_t count)
787 {
788 struct imon_context *ictx;
789
790 ictx = dev_get_drvdata(d);
791
792 if (!ictx)
793 return -ENODEV;
794
795 mutex_lock(&ictx->lock);
796 ictx->rf_isassociating = true;
797 send_associate_24g(ictx);
798 mutex_unlock(&ictx->lock);
799
800 return count;
801 }
802
803 /*
804 * sysfs functions to control internal imon clock
805 */
show_imon_clock(struct device * d,struct device_attribute * attr,char * buf)806 static ssize_t show_imon_clock(struct device *d,
807 struct device_attribute *attr, char *buf)
808 {
809 struct imon_context *ictx = dev_get_drvdata(d);
810 size_t len;
811
812 if (!ictx)
813 return -ENODEV;
814
815 mutex_lock(&ictx->lock);
816
817 if (!ictx->display_supported) {
818 len = snprintf(buf, PAGE_SIZE, "Not supported.");
819 } else {
820 len = snprintf(buf, PAGE_SIZE,
821 "To set the clock on your iMON display:\n"
822 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
823 "%s", ictx->display_isopen ?
824 "\nNOTE: imon device must be closed\n" : "");
825 }
826
827 mutex_unlock(&ictx->lock);
828
829 return len;
830 }
831
store_imon_clock(struct device * d,struct device_attribute * attr,const char * buf,size_t count)832 static ssize_t store_imon_clock(struct device *d,
833 struct device_attribute *attr,
834 const char *buf, size_t count)
835 {
836 struct imon_context *ictx = dev_get_drvdata(d);
837 ssize_t retval;
838 unsigned int year, month, day, dow, hour, minute, second;
839
840 if (!ictx)
841 return -ENODEV;
842
843 mutex_lock(&ictx->lock);
844
845 if (!ictx->display_supported) {
846 retval = -ENODEV;
847 goto exit;
848 } else if (ictx->display_isopen) {
849 retval = -EBUSY;
850 goto exit;
851 }
852
853 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
854 &hour, &minute, &second) != 7) {
855 retval = -EINVAL;
856 goto exit;
857 }
858
859 if ((month < 1 || month > 12) ||
860 (day < 1 || day > 31) || (dow > 6) ||
861 (hour > 23) || (minute > 59) || (second > 59)) {
862 retval = -EINVAL;
863 goto exit;
864 }
865
866 retval = send_set_imon_clock(ictx, year, month, day, dow,
867 hour, minute, second);
868 if (retval)
869 goto exit;
870
871 retval = count;
872 exit:
873 mutex_unlock(&ictx->lock);
874
875 return retval;
876 }
877
878
879 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
880 store_imon_clock);
881
882 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
883 store_associate_remote);
884
885 static struct attribute *imon_display_sysfs_entries[] = {
886 &dev_attr_imon_clock.attr,
887 NULL
888 };
889
890 static const struct attribute_group imon_display_attr_group = {
891 .attrs = imon_display_sysfs_entries
892 };
893
894 static struct attribute *imon_rf_sysfs_entries[] = {
895 &dev_attr_associate_remote.attr,
896 NULL
897 };
898
899 static const struct attribute_group imon_rf_attr_group = {
900 .attrs = imon_rf_sysfs_entries
901 };
902
903 /*
904 * Writes data to the VFD. The iMON VFD is 2x16 characters
905 * and requires data in 5 consecutive USB interrupt packets,
906 * each packet but the last carrying 7 bytes.
907 *
908 * I don't know if the VFD board supports features such as
909 * scrolling, clearing rows, blanking, etc. so at
910 * the caller must provide a full screen of data. If fewer
911 * than 32 bytes are provided spaces will be appended to
912 * generate a full screen.
913 */
vfd_write(struct file * file,const char __user * buf,size_t n_bytes,loff_t * pos)914 static ssize_t vfd_write(struct file *file, const char __user *buf,
915 size_t n_bytes, loff_t *pos)
916 {
917 int i;
918 int offset;
919 int seq;
920 int retval = 0;
921 struct imon_context *ictx;
922 static const unsigned char vfd_packet6[] = {
923 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
924
925 ictx = file->private_data;
926 if (!ictx) {
927 pr_err_ratelimited("no context for device\n");
928 return -ENODEV;
929 }
930
931 mutex_lock(&ictx->lock);
932
933 if (!ictx->dev_present_intf0) {
934 pr_err_ratelimited("no iMON device present\n");
935 retval = -ENODEV;
936 goto exit;
937 }
938
939 if (n_bytes <= 0 || n_bytes > 32) {
940 pr_err_ratelimited("invalid payload size\n");
941 retval = -EINVAL;
942 goto exit;
943 }
944
945 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
946 retval = -EFAULT;
947 goto exit;
948 }
949
950 /* Pad with spaces */
951 for (i = n_bytes; i < 32; ++i)
952 ictx->tx.data_buf[i] = ' ';
953
954 for (i = 32; i < 35; ++i)
955 ictx->tx.data_buf[i] = 0xFF;
956
957 offset = 0;
958 seq = 0;
959
960 do {
961 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
962 ictx->usb_tx_buf[7] = (unsigned char) seq;
963
964 retval = send_packet(ictx);
965 if (retval) {
966 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
967 goto exit;
968 } else {
969 seq += 2;
970 offset += 7;
971 }
972
973 } while (offset < 35);
974
975 /* Send packet #6 */
976 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
977 ictx->usb_tx_buf[7] = (unsigned char) seq;
978 retval = send_packet(ictx);
979 if (retval)
980 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
981
982 exit:
983 mutex_unlock(&ictx->lock);
984
985 return (!retval) ? n_bytes : retval;
986 }
987
988 /*
989 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
990 * packets. We accept data as 16 hexadecimal digits, followed by a
991 * newline (to make it easy to drive the device from a command-line
992 * -- even though the actual binary data is a bit complicated).
993 *
994 * The device itself is not a "traditional" text-mode display. It's
995 * actually a 16x96 pixel bitmap display. That means if you want to
996 * display text, you've got to have your own "font" and translate the
997 * text into bitmaps for display. This is really flexible (you can
998 * display whatever diacritics you need, and so on), but it's also
999 * a lot more complicated than most LCDs...
1000 */
lcd_write(struct file * file,const char __user * buf,size_t n_bytes,loff_t * pos)1001 static ssize_t lcd_write(struct file *file, const char __user *buf,
1002 size_t n_bytes, loff_t *pos)
1003 {
1004 int retval = 0;
1005 struct imon_context *ictx;
1006
1007 ictx = file->private_data;
1008 if (!ictx) {
1009 pr_err_ratelimited("no context for device\n");
1010 return -ENODEV;
1011 }
1012
1013 mutex_lock(&ictx->lock);
1014
1015 if (!ictx->display_supported) {
1016 pr_err_ratelimited("no iMON display present\n");
1017 retval = -ENODEV;
1018 goto exit;
1019 }
1020
1021 if (n_bytes != 8) {
1022 pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
1023 (int)n_bytes);
1024 retval = -EINVAL;
1025 goto exit;
1026 }
1027
1028 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
1029 retval = -EFAULT;
1030 goto exit;
1031 }
1032
1033 retval = send_packet(ictx);
1034 if (retval) {
1035 pr_err_ratelimited("send packet failed!\n");
1036 goto exit;
1037 } else {
1038 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
1039 __func__, (int) n_bytes);
1040 }
1041 exit:
1042 mutex_unlock(&ictx->lock);
1043 return (!retval) ? n_bytes : retval;
1044 }
1045
1046 /*
1047 * Callback function for USB core API: transmit data
1048 */
usb_tx_callback(struct urb * urb)1049 static void usb_tx_callback(struct urb *urb)
1050 {
1051 struct imon_context *ictx;
1052
1053 if (!urb)
1054 return;
1055 ictx = (struct imon_context *)urb->context;
1056 if (!ictx)
1057 return;
1058
1059 ictx->tx.status = urb->status;
1060
1061 /* notify waiters that write has finished */
1062 ictx->tx.busy = false;
1063 smp_rmb(); /* ensure later readers know we're not busy */
1064 complete(&ictx->tx.finished);
1065 }
1066
1067 /*
1068 * report touchscreen input
1069 */
imon_touch_display_timeout(struct timer_list * t)1070 static void imon_touch_display_timeout(struct timer_list *t)
1071 {
1072 struct imon_context *ictx = from_timer(ictx, t, ttimer);
1073
1074 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
1075 return;
1076
1077 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1078 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1079 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
1080 input_sync(ictx->touch);
1081 }
1082
1083 /*
1084 * iMON IR receivers support two different signal sets -- those used by
1085 * the iMON remotes, and those used by the Windows MCE remotes (which is
1086 * really just RC-6), but only one or the other at a time, as the signals
1087 * are decoded onboard the receiver.
1088 *
1089 * This function gets called two different ways, one way is from
1090 * rc_register_device, for initial protocol selection/setup, and the other is
1091 * via a userspace-initiated protocol change request, either by direct sysfs
1092 * prodding or by something like ir-keytable. In the rc_register_device case,
1093 * the imon context lock is already held, but when initiated from userspace,
1094 * it is not, so we must acquire it prior to calling send_packet, which
1095 * requires that the lock is held.
1096 */
imon_ir_change_protocol(struct rc_dev * rc,u64 * rc_proto)1097 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto)
1098 {
1099 int retval;
1100 struct imon_context *ictx = rc->priv;
1101 struct device *dev = ictx->dev;
1102 bool unlock = false;
1103 unsigned char ir_proto_packet[] = {
1104 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1105
1106 if (*rc_proto && !(*rc_proto & rc->allowed_protocols))
1107 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n");
1108
1109 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) {
1110 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1111 ir_proto_packet[0] = 0x01;
1112 *rc_proto = RC_PROTO_BIT_RC6_MCE;
1113 } else if (*rc_proto & RC_PROTO_BIT_IMON) {
1114 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1115 if (!pad_stabilize)
1116 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1117 /* ir_proto_packet[0] = 0x00; // already the default */
1118 *rc_proto = RC_PROTO_BIT_IMON;
1119 } else {
1120 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n");
1121 if (!pad_stabilize)
1122 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1123 /* ir_proto_packet[0] = 0x00; // already the default */
1124 *rc_proto = RC_PROTO_BIT_IMON;
1125 }
1126
1127 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1128
1129 if (!mutex_is_locked(&ictx->lock)) {
1130 unlock = true;
1131 mutex_lock(&ictx->lock);
1132 }
1133
1134 retval = send_packet(ictx);
1135 if (retval)
1136 goto out;
1137
1138 ictx->rc_proto = *rc_proto;
1139 ictx->pad_mouse = false;
1140
1141 out:
1142 if (unlock)
1143 mutex_unlock(&ictx->lock);
1144
1145 return retval;
1146 }
1147
1148 /*
1149 * The directional pad behaves a bit differently, depending on whether this is
1150 * one of the older ffdc devices or a newer device. Newer devices appear to
1151 * have a higher resolution matrix for more precise mouse movement, but it
1152 * makes things overly sensitive in keyboard mode, so we do some interesting
1153 * contortions to make it less touchy. Older devices run through the same
1154 * routine with shorter timeout and a smaller threshold.
1155 */
stabilize(int a,int b,u16 timeout,u16 threshold)1156 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1157 {
1158 ktime_t ct;
1159 static ktime_t prev_time;
1160 static ktime_t hit_time;
1161 static int x, y, prev_result, hits;
1162 int result = 0;
1163 long msec, msec_hit;
1164
1165 ct = ktime_get();
1166 msec = ktime_ms_delta(ct, prev_time);
1167 msec_hit = ktime_ms_delta(ct, hit_time);
1168
1169 if (msec > 100) {
1170 x = 0;
1171 y = 0;
1172 hits = 0;
1173 }
1174
1175 x += a;
1176 y += b;
1177
1178 prev_time = ct;
1179
1180 if (abs(x) > threshold || abs(y) > threshold) {
1181 if (abs(y) > abs(x))
1182 result = (y > 0) ? 0x7F : 0x80;
1183 else
1184 result = (x > 0) ? 0x7F00 : 0x8000;
1185
1186 x = 0;
1187 y = 0;
1188
1189 if (result == prev_result) {
1190 hits++;
1191
1192 if (hits > 3) {
1193 switch (result) {
1194 case 0x7F:
1195 y = 17 * threshold / 30;
1196 break;
1197 case 0x80:
1198 y -= 17 * threshold / 30;
1199 break;
1200 case 0x7F00:
1201 x = 17 * threshold / 30;
1202 break;
1203 case 0x8000:
1204 x -= 17 * threshold / 30;
1205 break;
1206 }
1207 }
1208
1209 if (hits == 2 && msec_hit < timeout) {
1210 result = 0;
1211 hits = 1;
1212 }
1213 } else {
1214 prev_result = result;
1215 hits = 1;
1216 hit_time = ct;
1217 }
1218 }
1219
1220 return result;
1221 }
1222
imon_remote_key_lookup(struct imon_context * ictx,u32 scancode)1223 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1224 {
1225 u32 keycode;
1226 u32 release;
1227 bool is_release_code = false;
1228
1229 /* Look for the initial press of a button */
1230 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1231 ictx->rc_toggle = 0x0;
1232 ictx->rc_scancode = scancode;
1233
1234 /* Look for the release of a button */
1235 if (keycode == KEY_RESERVED) {
1236 release = scancode & ~0x4000;
1237 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1238 if (keycode != KEY_RESERVED)
1239 is_release_code = true;
1240 }
1241
1242 ictx->release_code = is_release_code;
1243
1244 return keycode;
1245 }
1246
imon_mce_key_lookup(struct imon_context * ictx,u32 scancode)1247 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1248 {
1249 u32 keycode;
1250
1251 #define MCE_KEY_MASK 0x7000
1252 #define MCE_TOGGLE_BIT 0x8000
1253
1254 /*
1255 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1256 * (the toggle bit flipping between alternating key presses), while
1257 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1258 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1259 * but we can't or them into all codes, as some keys are decoded in
1260 * a different way w/o the same use of the toggle bit...
1261 */
1262 if (scancode & 0x80000000)
1263 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1264
1265 ictx->rc_scancode = scancode;
1266 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1267
1268 /* not used in mce mode, but make sure we know its false */
1269 ictx->release_code = false;
1270
1271 return keycode;
1272 }
1273
imon_panel_key_lookup(struct imon_context * ictx,u64 code)1274 static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code)
1275 {
1276 int i;
1277 u32 keycode = KEY_RESERVED;
1278 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table;
1279
1280 for (i = 0; key_table[i].hw_code != 0; i++) {
1281 if (key_table[i].hw_code == (code | 0xffee)) {
1282 keycode = key_table[i].keycode;
1283 break;
1284 }
1285 }
1286 ictx->release_code = false;
1287 return keycode;
1288 }
1289
imon_mouse_event(struct imon_context * ictx,unsigned char * buf,int len)1290 static bool imon_mouse_event(struct imon_context *ictx,
1291 unsigned char *buf, int len)
1292 {
1293 signed char rel_x = 0x00, rel_y = 0x00;
1294 u8 right_shift = 1;
1295 bool mouse_input = true;
1296 int dir = 0;
1297 unsigned long flags;
1298
1299 spin_lock_irqsave(&ictx->kc_lock, flags);
1300
1301 /* newer iMON device PAD or mouse button */
1302 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1303 rel_x = buf[2];
1304 rel_y = buf[3];
1305 right_shift = 1;
1306 /* 0xffdc iMON PAD or mouse button input */
1307 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1308 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1309 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1310 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1311 if (buf[0] & 0x02)
1312 rel_x |= ~0x0f;
1313 rel_x = rel_x + rel_x / 2;
1314 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1315 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1316 if (buf[0] & 0x01)
1317 rel_y |= ~0x0f;
1318 rel_y = rel_y + rel_y / 2;
1319 right_shift = 2;
1320 /* some ffdc devices decode mouse buttons differently... */
1321 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1322 right_shift = 2;
1323 /* ch+/- buttons, which we use for an emulated scroll wheel */
1324 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1325 dir = 1;
1326 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1327 dir = -1;
1328 } else
1329 mouse_input = false;
1330
1331 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1332
1333 if (mouse_input) {
1334 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1335
1336 if (dir) {
1337 input_report_rel(ictx->idev, REL_WHEEL, dir);
1338 } else if (rel_x || rel_y) {
1339 input_report_rel(ictx->idev, REL_X, rel_x);
1340 input_report_rel(ictx->idev, REL_Y, rel_y);
1341 } else {
1342 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1343 input_report_key(ictx->idev, BTN_RIGHT,
1344 buf[1] >> right_shift & 0x1);
1345 }
1346 input_sync(ictx->idev);
1347 spin_lock_irqsave(&ictx->kc_lock, flags);
1348 ictx->last_keycode = ictx->kc;
1349 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1350 }
1351
1352 return mouse_input;
1353 }
1354
imon_touch_event(struct imon_context * ictx,unsigned char * buf)1355 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1356 {
1357 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1358 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1359 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1360 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1361 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1362 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1363 input_sync(ictx->touch);
1364 }
1365
imon_pad_to_keys(struct imon_context * ictx,unsigned char * buf)1366 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1367 {
1368 int dir = 0;
1369 signed char rel_x = 0x00, rel_y = 0x00;
1370 u16 timeout, threshold;
1371 u32 scancode = KEY_RESERVED;
1372 unsigned long flags;
1373
1374 /*
1375 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1376 * contain a position coordinate (x,y), with each component ranging
1377 * from -14 to 14. We want to down-sample this to only 4 discrete values
1378 * for up/down/left/right arrow keys. Also, when you get too close to
1379 * diagonals, it has a tendency to jump back and forth, so lets try to
1380 * ignore when they get too close.
1381 */
1382 if (ictx->product != 0xffdc) {
1383 /* first, pad to 8 bytes so it conforms with everything else */
1384 buf[5] = buf[6] = buf[7] = 0;
1385 timeout = 500; /* in msecs */
1386 /* (2*threshold) x (2*threshold) square */
1387 threshold = pad_thresh ? pad_thresh : 28;
1388 rel_x = buf[2];
1389 rel_y = buf[3];
1390
1391 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
1392 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1393 dir = stabilize((int)rel_x, (int)rel_y,
1394 timeout, threshold);
1395 if (!dir) {
1396 spin_lock_irqsave(&ictx->kc_lock,
1397 flags);
1398 ictx->kc = KEY_UNKNOWN;
1399 spin_unlock_irqrestore(&ictx->kc_lock,
1400 flags);
1401 return;
1402 }
1403 buf[2] = dir & 0xFF;
1404 buf[3] = (dir >> 8) & 0xFF;
1405 scancode = be32_to_cpu(*((__be32 *)buf));
1406 }
1407 } else {
1408 /*
1409 * Hack alert: instead of using keycodes, we have
1410 * to use hard-coded scancodes here...
1411 */
1412 if (abs(rel_y) > abs(rel_x)) {
1413 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1414 buf[3] = 0;
1415 if (rel_y > 0)
1416 scancode = 0x01007f00; /* KEY_DOWN */
1417 else
1418 scancode = 0x01008000; /* KEY_UP */
1419 } else {
1420 buf[2] = 0;
1421 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1422 if (rel_x > 0)
1423 scancode = 0x0100007f; /* KEY_RIGHT */
1424 else
1425 scancode = 0x01000080; /* KEY_LEFT */
1426 }
1427 }
1428
1429 /*
1430 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1431 * device (15c2:ffdc). The remote generates various codes from
1432 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1433 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1434 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1435 * reversed endianness. Extract direction from buffer, rotate endianness,
1436 * adjust sign and feed the values into stabilize(). The resulting codes
1437 * will be 0x01008000, 0x01007F00, which match the newer devices.
1438 */
1439 } else {
1440 timeout = 10; /* in msecs */
1441 /* (2*threshold) x (2*threshold) square */
1442 threshold = pad_thresh ? pad_thresh : 15;
1443
1444 /* buf[1] is x */
1445 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1446 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1447 if (buf[0] & 0x02)
1448 rel_x |= ~0x10+1;
1449 /* buf[2] is y */
1450 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1451 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1452 if (buf[0] & 0x01)
1453 rel_y |= ~0x10+1;
1454
1455 buf[0] = 0x01;
1456 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1457
1458 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
1459 dir = stabilize((int)rel_x, (int)rel_y,
1460 timeout, threshold);
1461 if (!dir) {
1462 spin_lock_irqsave(&ictx->kc_lock, flags);
1463 ictx->kc = KEY_UNKNOWN;
1464 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1465 return;
1466 }
1467 buf[2] = dir & 0xFF;
1468 buf[3] = (dir >> 8) & 0xFF;
1469 scancode = be32_to_cpu(*((__be32 *)buf));
1470 } else {
1471 /*
1472 * Hack alert: instead of using keycodes, we have
1473 * to use hard-coded scancodes here...
1474 */
1475 if (abs(rel_y) > abs(rel_x)) {
1476 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1477 buf[3] = 0;
1478 if (rel_y > 0)
1479 scancode = 0x01007f00; /* KEY_DOWN */
1480 else
1481 scancode = 0x01008000; /* KEY_UP */
1482 } else {
1483 buf[2] = 0;
1484 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1485 if (rel_x > 0)
1486 scancode = 0x0100007f; /* KEY_RIGHT */
1487 else
1488 scancode = 0x01000080; /* KEY_LEFT */
1489 }
1490 }
1491 }
1492
1493 if (scancode) {
1494 spin_lock_irqsave(&ictx->kc_lock, flags);
1495 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1496 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1497 }
1498 }
1499
1500 /*
1501 * figure out if these is a press or a release. We don't actually
1502 * care about repeats, as those will be auto-generated within the IR
1503 * subsystem for repeating scancodes.
1504 */
imon_parse_press_type(struct imon_context * ictx,unsigned char * buf,u8 ktype)1505 static int imon_parse_press_type(struct imon_context *ictx,
1506 unsigned char *buf, u8 ktype)
1507 {
1508 int press_type = 0;
1509 unsigned long flags;
1510
1511 spin_lock_irqsave(&ictx->kc_lock, flags);
1512
1513 /* key release of 0x02XXXXXX key */
1514 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1515 ictx->kc = ictx->last_keycode;
1516
1517 /* mouse button release on (some) 0xffdc devices */
1518 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1519 buf[2] == 0x81 && buf[3] == 0xb7)
1520 ictx->kc = ictx->last_keycode;
1521
1522 /* mouse button release on (some other) 0xffdc devices */
1523 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1524 buf[2] == 0x81 && buf[3] == 0xb7)
1525 ictx->kc = ictx->last_keycode;
1526
1527 /* mce-specific button handling, no keyup events */
1528 else if (ktype == IMON_KEY_MCE) {
1529 ictx->rc_toggle = buf[2];
1530 press_type = 1;
1531
1532 /* incoherent or irrelevant data */
1533 } else if (ictx->kc == KEY_RESERVED)
1534 press_type = -EINVAL;
1535
1536 /* key release of 0xXXXXXXb7 key */
1537 else if (ictx->release_code)
1538 press_type = 0;
1539
1540 /* this is a button press */
1541 else
1542 press_type = 1;
1543
1544 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1545
1546 return press_type;
1547 }
1548
1549 /*
1550 * Process the incoming packet
1551 */
imon_incoming_packet(struct imon_context * ictx,struct urb * urb,int intf)1552 static void imon_incoming_packet(struct imon_context *ictx,
1553 struct urb *urb, int intf)
1554 {
1555 int len = urb->actual_length;
1556 unsigned char *buf = urb->transfer_buffer;
1557 struct device *dev = ictx->dev;
1558 unsigned long flags;
1559 u32 kc;
1560 u64 scancode;
1561 int press_type = 0;
1562 long msec;
1563 ktime_t t;
1564 static ktime_t prev_time;
1565 u8 ktype;
1566
1567 /* filter out junk data on the older 0xffdc imon devices */
1568 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1569 return;
1570
1571 /* Figure out what key was pressed */
1572 if (len == 8 && buf[7] == 0xee) {
1573 scancode = be64_to_cpu(*((__be64 *)buf));
1574 ktype = IMON_KEY_PANEL;
1575 kc = imon_panel_key_lookup(ictx, scancode);
1576 ictx->release_code = false;
1577 } else {
1578 scancode = be32_to_cpu(*((__be32 *)buf));
1579 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) {
1580 ktype = IMON_KEY_IMON;
1581 if (buf[0] == 0x80)
1582 ktype = IMON_KEY_MCE;
1583 kc = imon_mce_key_lookup(ictx, scancode);
1584 } else {
1585 ktype = IMON_KEY_IMON;
1586 kc = imon_remote_key_lookup(ictx, scancode);
1587 }
1588 }
1589
1590 spin_lock_irqsave(&ictx->kc_lock, flags);
1591 /* keyboard/mouse mode toggle button */
1592 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1593 ictx->last_keycode = kc;
1594 if (!nomouse) {
1595 ictx->pad_mouse = !ictx->pad_mouse;
1596 dev_dbg(dev, "toggling to %s mode\n",
1597 ictx->pad_mouse ? "mouse" : "keyboard");
1598 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1599 return;
1600 } else {
1601 ictx->pad_mouse = false;
1602 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1603 }
1604 }
1605
1606 ictx->kc = kc;
1607 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1608
1609 /* send touchscreen events through input subsystem if touchpad data */
1610 if (ictx->touch && len == 8 && buf[7] == 0x86) {
1611 imon_touch_event(ictx, buf);
1612 return;
1613
1614 /* look for mouse events with pad in mouse mode */
1615 } else if (ictx->pad_mouse) {
1616 if (imon_mouse_event(ictx, buf, len))
1617 return;
1618 }
1619
1620 /* Now for some special handling to convert pad input to arrow keys */
1621 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1622 ((len == 8) && (buf[0] & 0x40) &&
1623 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1624 len = 8;
1625 imon_pad_to_keys(ictx, buf);
1626 }
1627
1628 if (debug) {
1629 printk(KERN_INFO "intf%d decoded packet: %*ph\n",
1630 intf, len, buf);
1631 }
1632
1633 press_type = imon_parse_press_type(ictx, buf, ktype);
1634 if (press_type < 0)
1635 goto not_input_data;
1636
1637 if (ktype != IMON_KEY_PANEL) {
1638 if (press_type == 0)
1639 rc_keyup(ictx->rdev);
1640 else {
1641 enum rc_proto proto;
1642
1643 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
1644 proto = RC_PROTO_RC6_MCE;
1645 else if (ictx->rc_proto == RC_PROTO_BIT_IMON)
1646 proto = RC_PROTO_IMON;
1647 else
1648 return;
1649
1650 rc_keydown(ictx->rdev, proto, ictx->rc_scancode,
1651 ictx->rc_toggle);
1652
1653 spin_lock_irqsave(&ictx->kc_lock, flags);
1654 ictx->last_keycode = ictx->kc;
1655 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1656 }
1657 return;
1658 }
1659
1660 /* Only panel type events left to process now */
1661 spin_lock_irqsave(&ictx->kc_lock, flags);
1662
1663 t = ktime_get();
1664 /* KEY_MUTE repeats from knob need to be suppressed */
1665 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1666 msec = ktime_ms_delta(t, prev_time);
1667 if (msec < ictx->idev->rep[REP_DELAY]) {
1668 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1669 return;
1670 }
1671 }
1672 prev_time = t;
1673 kc = ictx->kc;
1674
1675 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1676
1677 input_report_key(ictx->idev, kc, press_type);
1678 input_sync(ictx->idev);
1679
1680 /* panel keys don't generate a release */
1681 input_report_key(ictx->idev, kc, 0);
1682 input_sync(ictx->idev);
1683
1684 spin_lock_irqsave(&ictx->kc_lock, flags);
1685 ictx->last_keycode = kc;
1686 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1687
1688 return;
1689
1690 not_input_data:
1691 if (len != 8) {
1692 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n",
1693 __func__, len, intf);
1694 return;
1695 }
1696
1697 /* iMON 2.4G associate frame */
1698 if (buf[0] == 0x00 &&
1699 buf[2] == 0xFF && /* REFID */
1700 buf[3] == 0xFF &&
1701 buf[4] == 0xFF &&
1702 buf[5] == 0xFF && /* iMON 2.4G */
1703 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1704 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1705 dev_warn(dev, "%s: remote associated refid=%02X\n",
1706 __func__, buf[1]);
1707 ictx->rf_isassociating = false;
1708 }
1709 }
1710
1711 /*
1712 * Callback function for USB core API: receive data
1713 */
usb_rx_callback_intf0(struct urb * urb)1714 static void usb_rx_callback_intf0(struct urb *urb)
1715 {
1716 struct imon_context *ictx;
1717 int intfnum = 0;
1718
1719 if (!urb)
1720 return;
1721
1722 ictx = (struct imon_context *)urb->context;
1723 if (!ictx)
1724 return;
1725
1726 /*
1727 * if we get a callback before we're done configuring the hardware, we
1728 * can't yet process the data, as there's nowhere to send it, but we
1729 * still need to submit a new rx URB to avoid wedging the hardware
1730 */
1731 if (!ictx->dev_present_intf0)
1732 goto out;
1733
1734 switch (urb->status) {
1735 case -ENOENT: /* usbcore unlink successful! */
1736 return;
1737
1738 case -ESHUTDOWN: /* transport endpoint was shut down */
1739 break;
1740
1741 case 0:
1742 imon_incoming_packet(ictx, urb, intfnum);
1743 break;
1744
1745 default:
1746 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1747 __func__, urb->status);
1748 break;
1749 }
1750
1751 out:
1752 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1753 }
1754
usb_rx_callback_intf1(struct urb * urb)1755 static void usb_rx_callback_intf1(struct urb *urb)
1756 {
1757 struct imon_context *ictx;
1758 int intfnum = 1;
1759
1760 if (!urb)
1761 return;
1762
1763 ictx = (struct imon_context *)urb->context;
1764 if (!ictx)
1765 return;
1766
1767 /*
1768 * if we get a callback before we're done configuring the hardware, we
1769 * can't yet process the data, as there's nowhere to send it, but we
1770 * still need to submit a new rx URB to avoid wedging the hardware
1771 */
1772 if (!ictx->dev_present_intf1)
1773 goto out;
1774
1775 switch (urb->status) {
1776 case -ENOENT: /* usbcore unlink successful! */
1777 return;
1778
1779 case -ESHUTDOWN: /* transport endpoint was shut down */
1780 break;
1781
1782 case 0:
1783 imon_incoming_packet(ictx, urb, intfnum);
1784 break;
1785
1786 default:
1787 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1788 __func__, urb->status);
1789 break;
1790 }
1791
1792 out:
1793 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1794 }
1795
1796 /*
1797 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1798 * devices, and all of them constantly spew interrupts, even when there
1799 * is no actual data to report. However, byte 6 of this buffer looks like
1800 * its unique across device variants, so we're trying to key off that to
1801 * figure out which display type (if any) and what IR protocol the device
1802 * actually supports. These devices have their IR protocol hard-coded into
1803 * their firmware, they can't be changed on the fly like the newer hardware.
1804 */
imon_get_ffdc_type(struct imon_context * ictx)1805 static void imon_get_ffdc_type(struct imon_context *ictx)
1806 {
1807 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1808 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1809 u64 allowed_protos = RC_PROTO_BIT_IMON;
1810
1811 switch (ffdc_cfg_byte) {
1812 /* iMON Knob, no display, iMON IR + vol knob */
1813 case 0x21:
1814 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1815 ictx->display_supported = false;
1816 break;
1817 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1818 case 0x4e:
1819 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1820 ictx->display_supported = false;
1821 ictx->rf_device = true;
1822 break;
1823 /* iMON VFD, no IR (does have vol knob tho) */
1824 case 0x35:
1825 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1826 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1827 break;
1828 /* iMON VFD, iMON IR */
1829 case 0x24:
1830 case 0x30:
1831 case 0x85:
1832 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1833 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1834 break;
1835 /* iMON VFD, MCE IR */
1836 case 0x46:
1837 case 0x9e:
1838 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1839 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1840 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1841 break;
1842 /* iMON VFD, iMON or MCE IR */
1843 case 0x7e:
1844 dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR");
1845 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1846 allowed_protos |= RC_PROTO_BIT_RC6_MCE;
1847 break;
1848 /* iMON LCD, MCE IR */
1849 case 0x9f:
1850 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1851 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1852 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1853 break;
1854 /* no display, iMON IR */
1855 case 0x26:
1856 dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR");
1857 ictx->display_supported = false;
1858 break;
1859 default:
1860 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR");
1861 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1862 /*
1863 * We don't know which one it is, allow user to set the
1864 * RC6 one from userspace if IMON wasn't correct.
1865 */
1866 allowed_protos |= RC_PROTO_BIT_RC6_MCE;
1867 break;
1868 }
1869
1870 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1871
1872 ictx->display_type = detected_display_type;
1873 ictx->rc_proto = allowed_protos;
1874 }
1875
imon_set_display_type(struct imon_context * ictx)1876 static void imon_set_display_type(struct imon_context *ictx)
1877 {
1878 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1879
1880 /*
1881 * Try to auto-detect the type of display if the user hasn't set
1882 * it by hand via the display_type modparam. Default is VFD.
1883 */
1884
1885 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1886 switch (ictx->product) {
1887 case 0xffdc:
1888 /* set in imon_get_ffdc_type() */
1889 configured_display_type = ictx->display_type;
1890 break;
1891 case 0x0034:
1892 case 0x0035:
1893 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1894 break;
1895 case 0x0038:
1896 case 0x0039:
1897 case 0x0045:
1898 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1899 break;
1900 case 0x003c:
1901 case 0x0041:
1902 case 0x0042:
1903 case 0x0043:
1904 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1905 ictx->display_supported = false;
1906 break;
1907 case 0x0036:
1908 case 0x0044:
1909 default:
1910 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1911 break;
1912 }
1913 } else {
1914 configured_display_type = display_type;
1915 if (display_type == IMON_DISPLAY_TYPE_NONE)
1916 ictx->display_supported = false;
1917 else
1918 ictx->display_supported = true;
1919 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n",
1920 __func__, display_type);
1921 }
1922
1923 ictx->display_type = configured_display_type;
1924 }
1925
imon_init_rdev(struct imon_context * ictx)1926 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1927 {
1928 struct rc_dev *rdev;
1929 int ret;
1930 static const unsigned char fp_packet[] = {
1931 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 };
1932
1933 rdev = rc_allocate_device(RC_DRIVER_SCANCODE);
1934 if (!rdev) {
1935 dev_err(ictx->dev, "remote control dev allocation failed\n");
1936 goto out;
1937 }
1938
1939 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1940 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1941 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1942 sizeof(ictx->phys_rdev));
1943 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1944
1945 rdev->device_name = ictx->name_rdev;
1946 rdev->input_phys = ictx->phys_rdev;
1947 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
1948 rdev->dev.parent = ictx->dev;
1949
1950 rdev->priv = ictx;
1951 /* iMON PAD or MCE */
1952 rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE;
1953 rdev->change_protocol = imon_ir_change_protocol;
1954 rdev->driver_name = MOD_NAME;
1955
1956 /* Enable front-panel buttons and/or knobs */
1957 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1958 ret = send_packet(ictx);
1959 /* Not fatal, but warn about it */
1960 if (ret)
1961 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1962
1963 if (ictx->product == 0xffdc) {
1964 imon_get_ffdc_type(ictx);
1965 rdev->allowed_protocols = ictx->rc_proto;
1966 }
1967
1968 imon_set_display_type(ictx);
1969
1970 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
1971 rdev->map_name = RC_MAP_IMON_MCE;
1972 else
1973 rdev->map_name = RC_MAP_IMON_PAD;
1974
1975 ret = rc_register_device(rdev);
1976 if (ret < 0) {
1977 dev_err(ictx->dev, "remote input dev register failed\n");
1978 goto out;
1979 }
1980
1981 return rdev;
1982
1983 out:
1984 rc_free_device(rdev);
1985 return NULL;
1986 }
1987
imon_init_idev(struct imon_context * ictx)1988 static struct input_dev *imon_init_idev(struct imon_context *ictx)
1989 {
1990 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table;
1991 struct input_dev *idev;
1992 int ret, i;
1993
1994 idev = input_allocate_device();
1995 if (!idev)
1996 goto out;
1997
1998 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1999 "iMON Panel, Knob and Mouse(%04x:%04x)",
2000 ictx->vendor, ictx->product);
2001 idev->name = ictx->name_idev;
2002
2003 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
2004 sizeof(ictx->phys_idev));
2005 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
2006 idev->phys = ictx->phys_idev;
2007
2008 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
2009
2010 idev->keybit[BIT_WORD(BTN_MOUSE)] =
2011 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2012 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
2013 BIT_MASK(REL_WHEEL);
2014
2015 /* panel and/or knob code support */
2016 for (i = 0; key_table[i].hw_code != 0; i++) {
2017 u32 kc = key_table[i].keycode;
2018 __set_bit(kc, idev->keybit);
2019 }
2020
2021 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
2022 idev->dev.parent = ictx->dev;
2023 input_set_drvdata(idev, ictx);
2024
2025 ret = input_register_device(idev);
2026 if (ret < 0) {
2027 dev_err(ictx->dev, "input dev register failed\n");
2028 goto out;
2029 }
2030
2031 return idev;
2032
2033 out:
2034 input_free_device(idev);
2035 return NULL;
2036 }
2037
imon_init_touch(struct imon_context * ictx)2038 static struct input_dev *imon_init_touch(struct imon_context *ictx)
2039 {
2040 struct input_dev *touch;
2041 int ret;
2042
2043 touch = input_allocate_device();
2044 if (!touch)
2045 goto touch_alloc_failed;
2046
2047 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
2048 "iMON USB Touchscreen (%04x:%04x)",
2049 ictx->vendor, ictx->product);
2050 touch->name = ictx->name_touch;
2051
2052 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
2053 sizeof(ictx->phys_touch));
2054 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
2055 touch->phys = ictx->phys_touch;
2056
2057 touch->evbit[0] =
2058 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
2059 touch->keybit[BIT_WORD(BTN_TOUCH)] =
2060 BIT_MASK(BTN_TOUCH);
2061 input_set_abs_params(touch, ABS_X,
2062 0x00, 0xfff, 0, 0);
2063 input_set_abs_params(touch, ABS_Y,
2064 0x00, 0xfff, 0, 0);
2065
2066 input_set_drvdata(touch, ictx);
2067
2068 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
2069 touch->dev.parent = ictx->dev;
2070 ret = input_register_device(touch);
2071 if (ret < 0) {
2072 dev_info(ictx->dev, "touchscreen input dev register failed\n");
2073 goto touch_register_failed;
2074 }
2075
2076 return touch;
2077
2078 touch_register_failed:
2079 input_free_device(touch);
2080
2081 touch_alloc_failed:
2082 return NULL;
2083 }
2084
imon_find_endpoints(struct imon_context * ictx,struct usb_host_interface * iface_desc)2085 static bool imon_find_endpoints(struct imon_context *ictx,
2086 struct usb_host_interface *iface_desc)
2087 {
2088 struct usb_endpoint_descriptor *ep;
2089 struct usb_endpoint_descriptor *rx_endpoint = NULL;
2090 struct usb_endpoint_descriptor *tx_endpoint = NULL;
2091 int ifnum = iface_desc->desc.bInterfaceNumber;
2092 int num_endpts = iface_desc->desc.bNumEndpoints;
2093 int i, ep_dir, ep_type;
2094 bool ir_ep_found = false;
2095 bool display_ep_found = false;
2096 bool tx_control = false;
2097
2098 /*
2099 * Scan the endpoint list and set:
2100 * first input endpoint = IR endpoint
2101 * first output endpoint = display endpoint
2102 */
2103 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2104 ep = &iface_desc->endpoint[i].desc;
2105 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2106 ep_type = usb_endpoint_type(ep);
2107
2108 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2109 ep_type == USB_ENDPOINT_XFER_INT) {
2110
2111 rx_endpoint = ep;
2112 ir_ep_found = true;
2113 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2114
2115 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2116 ep_type == USB_ENDPOINT_XFER_INT) {
2117 tx_endpoint = ep;
2118 display_ep_found = true;
2119 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2120 }
2121 }
2122
2123 if (ifnum == 0) {
2124 ictx->rx_endpoint_intf0 = rx_endpoint;
2125 /*
2126 * tx is used to send characters to lcd/vfd, associate RF
2127 * remotes, set IR protocol, and maybe more...
2128 */
2129 ictx->tx_endpoint = tx_endpoint;
2130 } else {
2131 ictx->rx_endpoint_intf1 = rx_endpoint;
2132 }
2133
2134 /*
2135 * If we didn't find a display endpoint, this is probably one of the
2136 * newer iMON devices that use control urb instead of interrupt
2137 */
2138 if (!display_ep_found) {
2139 tx_control = true;
2140 display_ep_found = true;
2141 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n",
2142 __func__);
2143 }
2144
2145 /*
2146 * Some iMON receivers have no display. Unfortunately, it seems
2147 * that SoundGraph recycles device IDs between devices both with
2148 * and without... :\
2149 */
2150 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2151 display_ep_found = false;
2152 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2153 }
2154
2155 /*
2156 * iMON Touch devices have a VGA touchscreen, but no "display", as
2157 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2158 */
2159 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2160 display_ep_found = false;
2161 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2162 }
2163
2164 /* Input endpoint is mandatory */
2165 if (!ir_ep_found)
2166 pr_err("no valid input (IR) endpoint found\n");
2167
2168 ictx->tx_control = tx_control;
2169
2170 if (display_ep_found)
2171 ictx->display_supported = true;
2172
2173 return ir_ep_found;
2174
2175 }
2176
imon_init_intf0(struct usb_interface * intf,const struct usb_device_id * id)2177 static struct imon_context *imon_init_intf0(struct usb_interface *intf,
2178 const struct usb_device_id *id)
2179 {
2180 struct imon_context *ictx;
2181 struct urb *rx_urb;
2182 struct urb *tx_urb;
2183 struct device *dev = &intf->dev;
2184 struct usb_host_interface *iface_desc;
2185 int ret = -ENOMEM;
2186
2187 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL);
2188 if (!ictx)
2189 goto exit;
2190
2191 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2192 if (!rx_urb)
2193 goto rx_urb_alloc_failed;
2194 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2195 if (!tx_urb)
2196 goto tx_urb_alloc_failed;
2197
2198 mutex_init(&ictx->lock);
2199 spin_lock_init(&ictx->kc_lock);
2200
2201 mutex_lock(&ictx->lock);
2202
2203 ictx->dev = dev;
2204 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2205 ictx->rx_urb_intf0 = rx_urb;
2206 ictx->tx_urb = tx_urb;
2207 ictx->rf_device = false;
2208
2209 init_completion(&ictx->tx.finished);
2210
2211 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2212 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2213
2214 /* save drive info for later accessing the panel/knob key table */
2215 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info;
2216 /* default send_packet delay is 5ms but some devices need more */
2217 ictx->send_packet_delay = ictx->dev_descr->flags &
2218 IMON_NEED_20MS_PKT_DELAY ? 20 : 5;
2219
2220 ret = -ENODEV;
2221 iface_desc = intf->cur_altsetting;
2222 if (!imon_find_endpoints(ictx, iface_desc)) {
2223 goto find_endpoint_failed;
2224 }
2225
2226 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2227 usb_rcvintpipe(ictx->usbdev_intf0,
2228 ictx->rx_endpoint_intf0->bEndpointAddress),
2229 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2230 usb_rx_callback_intf0, ictx,
2231 ictx->rx_endpoint_intf0->bInterval);
2232
2233 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2234 if (ret) {
2235 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2236 goto urb_submit_failed;
2237 }
2238
2239 ictx->idev = imon_init_idev(ictx);
2240 if (!ictx->idev) {
2241 dev_err(dev, "%s: input device setup failed\n", __func__);
2242 goto idev_setup_failed;
2243 }
2244
2245 ictx->rdev = imon_init_rdev(ictx);
2246 if (!ictx->rdev) {
2247 dev_err(dev, "%s: rc device setup failed\n", __func__);
2248 goto rdev_setup_failed;
2249 }
2250
2251 ictx->dev_present_intf0 = true;
2252
2253 mutex_unlock(&ictx->lock);
2254 return ictx;
2255
2256 rdev_setup_failed:
2257 input_unregister_device(ictx->idev);
2258 idev_setup_failed:
2259 usb_kill_urb(ictx->rx_urb_intf0);
2260 urb_submit_failed:
2261 find_endpoint_failed:
2262 usb_put_dev(ictx->usbdev_intf0);
2263 mutex_unlock(&ictx->lock);
2264 usb_free_urb(tx_urb);
2265 tx_urb_alloc_failed:
2266 usb_free_urb(rx_urb);
2267 rx_urb_alloc_failed:
2268 kfree(ictx);
2269 exit:
2270 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2271
2272 return NULL;
2273 }
2274
imon_init_intf1(struct usb_interface * intf,struct imon_context * ictx)2275 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2276 struct imon_context *ictx)
2277 {
2278 struct urb *rx_urb;
2279 struct usb_host_interface *iface_desc;
2280 int ret = -ENOMEM;
2281
2282 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2283 if (!rx_urb)
2284 goto rx_urb_alloc_failed;
2285
2286 mutex_lock(&ictx->lock);
2287
2288 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2289 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0);
2290 }
2291
2292 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2293 ictx->rx_urb_intf1 = rx_urb;
2294
2295 ret = -ENODEV;
2296 iface_desc = intf->cur_altsetting;
2297 if (!imon_find_endpoints(ictx, iface_desc))
2298 goto find_endpoint_failed;
2299
2300 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2301 ictx->touch = imon_init_touch(ictx);
2302 if (!ictx->touch)
2303 goto touch_setup_failed;
2304 } else
2305 ictx->touch = NULL;
2306
2307 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2308 usb_rcvintpipe(ictx->usbdev_intf1,
2309 ictx->rx_endpoint_intf1->bEndpointAddress),
2310 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2311 usb_rx_callback_intf1, ictx,
2312 ictx->rx_endpoint_intf1->bInterval);
2313
2314 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2315
2316 if (ret) {
2317 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2318 goto urb_submit_failed;
2319 }
2320
2321 ictx->dev_present_intf1 = true;
2322
2323 mutex_unlock(&ictx->lock);
2324 return ictx;
2325
2326 urb_submit_failed:
2327 if (ictx->touch)
2328 input_unregister_device(ictx->touch);
2329 touch_setup_failed:
2330 find_endpoint_failed:
2331 usb_put_dev(ictx->usbdev_intf1);
2332 mutex_unlock(&ictx->lock);
2333 usb_free_urb(rx_urb);
2334 rx_urb_alloc_failed:
2335 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
2336
2337 return NULL;
2338 }
2339
imon_init_display(struct imon_context * ictx,struct usb_interface * intf)2340 static void imon_init_display(struct imon_context *ictx,
2341 struct usb_interface *intf)
2342 {
2343 int ret;
2344
2345 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2346
2347 /* set up sysfs entry for built-in clock */
2348 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2349 if (ret)
2350 dev_err(ictx->dev, "Could not create display sysfs entries(%d)",
2351 ret);
2352
2353 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2354 ret = usb_register_dev(intf, &imon_lcd_class);
2355 else
2356 ret = usb_register_dev(intf, &imon_vfd_class);
2357 if (ret)
2358 /* Not a fatal error, so ignore */
2359 dev_info(ictx->dev, "could not get a minor number for display\n");
2360
2361 }
2362
2363 /*
2364 * Callback function for USB core API: Probe
2365 */
imon_probe(struct usb_interface * interface,const struct usb_device_id * id)2366 static int imon_probe(struct usb_interface *interface,
2367 const struct usb_device_id *id)
2368 {
2369 struct usb_device *usbdev = NULL;
2370 struct usb_host_interface *iface_desc = NULL;
2371 struct usb_interface *first_if;
2372 struct device *dev = &interface->dev;
2373 int ifnum, sysfs_err;
2374 int ret = 0;
2375 struct imon_context *ictx = NULL;
2376 struct imon_context *first_if_ctx = NULL;
2377 u16 vendor, product;
2378
2379 usbdev = usb_get_dev(interface_to_usbdev(interface));
2380 iface_desc = interface->cur_altsetting;
2381 ifnum = iface_desc->desc.bInterfaceNumber;
2382 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2383 product = le16_to_cpu(usbdev->descriptor.idProduct);
2384
2385 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2386 __func__, vendor, product, ifnum);
2387
2388 /* prevent races probing devices w/multiple interfaces */
2389 mutex_lock(&driver_lock);
2390
2391 first_if = usb_ifnum_to_if(usbdev, 0);
2392 if (!first_if) {
2393 ret = -ENODEV;
2394 goto fail;
2395 }
2396
2397 first_if_ctx = usb_get_intfdata(first_if);
2398
2399 if (ifnum == 0) {
2400 ictx = imon_init_intf0(interface, id);
2401 if (!ictx) {
2402 pr_err("failed to initialize context!\n");
2403 ret = -ENODEV;
2404 goto fail;
2405 }
2406
2407 } else {
2408 /* this is the secondary interface on the device */
2409
2410 /* fail early if first intf failed to register */
2411 if (!first_if_ctx) {
2412 ret = -ENODEV;
2413 goto fail;
2414 }
2415
2416 ictx = imon_init_intf1(interface, first_if_ctx);
2417 if (!ictx) {
2418 pr_err("failed to attach to context!\n");
2419 ret = -ENODEV;
2420 goto fail;
2421 }
2422
2423 }
2424
2425 usb_set_intfdata(interface, ictx);
2426
2427 if (ifnum == 0) {
2428 mutex_lock(&ictx->lock);
2429
2430 if (product == 0xffdc && ictx->rf_device) {
2431 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2432 &imon_rf_attr_group);
2433 if (sysfs_err)
2434 pr_err("Could not create RF sysfs entries(%d)\n",
2435 sysfs_err);
2436 }
2437
2438 if (ictx->display_supported)
2439 imon_init_display(ictx, interface);
2440
2441 mutex_unlock(&ictx->lock);
2442 }
2443
2444 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n",
2445 vendor, product, ifnum,
2446 usbdev->bus->busnum, usbdev->devnum);
2447
2448 mutex_unlock(&driver_lock);
2449 usb_put_dev(usbdev);
2450
2451 return 0;
2452
2453 fail:
2454 mutex_unlock(&driver_lock);
2455 usb_put_dev(usbdev);
2456 dev_err(dev, "unable to register, err %d\n", ret);
2457
2458 return ret;
2459 }
2460
2461 /*
2462 * Callback function for USB core API: disconnect
2463 */
imon_disconnect(struct usb_interface * interface)2464 static void imon_disconnect(struct usb_interface *interface)
2465 {
2466 struct imon_context *ictx;
2467 struct device *dev;
2468 int ifnum;
2469
2470 /* prevent races with multi-interface device probing and display_open */
2471 mutex_lock(&driver_lock);
2472
2473 ictx = usb_get_intfdata(interface);
2474 dev = ictx->dev;
2475 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2476
2477 /*
2478 * sysfs_remove_group is safe to call even if sysfs_create_group
2479 * hasn't been called
2480 */
2481 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2482 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2483
2484 usb_set_intfdata(interface, NULL);
2485
2486 /* Abort ongoing write */
2487 if (ictx->tx.busy) {
2488 usb_kill_urb(ictx->tx_urb);
2489 complete(&ictx->tx.finished);
2490 }
2491
2492 if (ifnum == 0) {
2493 ictx->dev_present_intf0 = false;
2494 usb_kill_urb(ictx->rx_urb_intf0);
2495 usb_put_dev(ictx->usbdev_intf0);
2496 input_unregister_device(ictx->idev);
2497 rc_unregister_device(ictx->rdev);
2498 if (ictx->display_supported) {
2499 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2500 usb_deregister_dev(interface, &imon_lcd_class);
2501 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
2502 usb_deregister_dev(interface, &imon_vfd_class);
2503 }
2504 } else {
2505 ictx->dev_present_intf1 = false;
2506 usb_kill_urb(ictx->rx_urb_intf1);
2507 usb_put_dev(ictx->usbdev_intf1);
2508 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2509 input_unregister_device(ictx->touch);
2510 del_timer_sync(&ictx->ttimer);
2511 }
2512 }
2513
2514 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1)
2515 free_imon_context(ictx);
2516
2517 mutex_unlock(&driver_lock);
2518
2519 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2520 __func__, ifnum);
2521 }
2522
imon_suspend(struct usb_interface * intf,pm_message_t message)2523 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2524 {
2525 struct imon_context *ictx = usb_get_intfdata(intf);
2526 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2527
2528 if (ifnum == 0)
2529 usb_kill_urb(ictx->rx_urb_intf0);
2530 else
2531 usb_kill_urb(ictx->rx_urb_intf1);
2532
2533 return 0;
2534 }
2535
imon_resume(struct usb_interface * intf)2536 static int imon_resume(struct usb_interface *intf)
2537 {
2538 int rc = 0;
2539 struct imon_context *ictx = usb_get_intfdata(intf);
2540 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2541
2542 if (ifnum == 0) {
2543 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2544 usb_rcvintpipe(ictx->usbdev_intf0,
2545 ictx->rx_endpoint_intf0->bEndpointAddress),
2546 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2547 usb_rx_callback_intf0, ictx,
2548 ictx->rx_endpoint_intf0->bInterval);
2549
2550 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2551
2552 } else {
2553 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2554 usb_rcvintpipe(ictx->usbdev_intf1,
2555 ictx->rx_endpoint_intf1->bEndpointAddress),
2556 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2557 usb_rx_callback_intf1, ictx,
2558 ictx->rx_endpoint_intf1->bInterval);
2559
2560 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2561 }
2562
2563 return rc;
2564 }
2565
2566 module_usb_driver(imon_driver);
2567