?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / rc / imon.c
blobed95244da894c834f5e2d695844ae86b3d990a7d
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
4 *
5 * Copyright(C) 2010 Jarod Wilson <jarod@wilsonet.com>
6 * Portions based on the original lirc_imon driver,
7 * Copyright(C) 2004 Venky Raju(dev@venky.ws)
8 *
9 * Huge thanks to R. Geoff Newbury for invaluable debugging on the
10 * 0xffdc iMON devices, and for sending me one to hack on, without
11 * which the support for them wouldn't be nearly as good. Thanks
12 * also to the numerous 0xffdc device owners that tested auto-config
13 * support for me and provided debug dumps from their devices.
14 */
15
16 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18 #include <linux/errno.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/ktime.h>
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/uaccess.h>
25 #include <linux/ratelimit.h>
26
27 #include <linux/input.h>
28 #include <linux/usb.h>
29 #include <linux/usb/input.h>
30 #include <media/rc-core.h>
31
32 #include <linux/timer.h>
33
34 #define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
35 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
36 #define MOD_NAME "imon"
37 #define MOD_VERSION "0.9.4"
38
39 #define DISPLAY_MINOR_BASE 144
40 #define DEVICE_NAME "lcd%d"
41
42 #define BUF_CHUNK_SIZE 8
43 #define BUF_SIZE 128
44
45 #define BIT_DURATION 250 /* each bit received is 250us */
46
47 #define IMON_CLOCK_ENABLE_PACKETS 2
48
49 /*** P R O T O T Y P E S ***/
50
51 /* USB Callback prototypes */
52 static int imon_probe(struct usb_interface *interface,
53 const struct usb_device_id *id);
54 static void imon_disconnect(struct usb_interface *interface);
55 static void usb_rx_callback_intf0(struct urb *urb);
56 static void usb_rx_callback_intf1(struct urb *urb);
57 static void usb_tx_callback(struct urb *urb);
58
59 /* suspend/resume support */
60 static int imon_resume(struct usb_interface *intf);
61 static int imon_suspend(struct usb_interface *intf, pm_message_t message);
62
63 /* Display file_operations function prototypes */
64 static int display_open(struct inode *inode, struct file *file);
65 static int display_close(struct inode *inode, struct file *file);
66
67 /* VFD write operation */
68 static ssize_t vfd_write(struct file *file, const char __user *buf,
69 size_t n_bytes, loff_t *pos);
70
71 /* LCD file_operations override function prototypes */
72 static ssize_t lcd_write(struct file *file, const char __user *buf,
73 size_t n_bytes, loff_t *pos);
74
75 /*** G L O B A L S ***/
76
77 struct imon_panel_key_table {
78 u64 hw_code;
79 u32 keycode;
80 };
81
82 struct imon_usb_dev_descr {
83 __u16 flags;
84 #define IMON_NO_FLAGS 0
85 #define IMON_NEED_20MS_PKT_DELAY 1
86 #define IMON_SUPPRESS_REPEATED_KEYS 2
87 struct imon_panel_key_table key_table[];
88 };
89
90 struct imon_context {
91 struct device *dev;
92 /* Newer devices have two interfaces */
93 struct usb_device *usbdev_intf0;
94 struct usb_device *usbdev_intf1;
95
96 bool display_supported; /* not all controllers do */
97 bool display_isopen; /* display port has been opened */
98 bool rf_device; /* true if iMON 2.4G LT/DT RF device */
99 bool rf_isassociating; /* RF remote associating */
100 bool dev_present_intf0; /* USB device presence, interface 0 */
101 bool dev_present_intf1; /* USB device presence, interface 1 */
102
103 struct mutex lock; /* to lock this object */
104 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
105
106 struct usb_endpoint_descriptor *rx_endpoint_intf0;
107 struct usb_endpoint_descriptor *rx_endpoint_intf1;
108 struct usb_endpoint_descriptor *tx_endpoint;
109 struct urb *rx_urb_intf0;
110 struct urb *rx_urb_intf1;
111 struct urb *tx_urb;
112 bool tx_control;
113 unsigned char usb_rx_buf[8];
114 unsigned char usb_tx_buf[8];
115 unsigned int send_packet_delay;
116
117 struct tx_t {
118 unsigned char data_buf[35]; /* user data buffer */
119 struct completion finished; /* wait for write to finish */
120 bool busy; /* write in progress */
121 int status; /* status of tx completion */
122 } tx;
123
124 u16 vendor; /* usb vendor ID */
125 u16 product; /* usb product ID */
126
127 struct rc_dev *rdev; /* rc-core device for remote */
128 struct input_dev *idev; /* input device for panel & IR mouse */
129 struct input_dev *touch; /* input device for touchscreen */
130
131 spinlock_t kc_lock; /* make sure we get keycodes right */
132 u32 kc; /* current input keycode */
133 u32 last_keycode; /* last reported input keycode */
134 u32 rc_scancode; /* the computed remote scancode */
135 u8 rc_toggle; /* the computed remote toggle bit */
136 u64 rc_proto; /* iMON or MCE (RC6) IR protocol? */
137 bool release_code; /* some keys send a release code */
138
139 u8 display_type; /* store the display type */
140 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
141
142 char name_rdev[128]; /* rc input device name */
143 char phys_rdev[64]; /* rc input device phys path */
144
145 char name_idev[128]; /* input device name */
146 char phys_idev[64]; /* input device phys path */
147
148 char name_touch[128]; /* touch screen name */
149 char phys_touch[64]; /* touch screen phys path */
150 struct timer_list ttimer; /* touch screen timer */
151 int touch_x; /* x coordinate on touchscreen */
152 int touch_y; /* y coordinate on touchscreen */
153 const struct imon_usb_dev_descr *dev_descr;
154 /* device description with key */
155 /* table for front panels */
156 };
157
158 #define TOUCH_TIMEOUT (HZ/30)
159
160 /* vfd character device file operations */
161 static const struct file_operations vfd_fops = {
162 .owner = THIS_MODULE,
163 .open = &display_open,
164 .write = &vfd_write,
165 .release = &display_close,
166 .llseek = noop_llseek,
167 };
168
169 /* lcd character device file operations */
170 static const struct file_operations lcd_fops = {
171 .owner = THIS_MODULE,
172 .open = &display_open,
173 .write = &lcd_write,
174 .release = &display_close,
175 .llseek = noop_llseek,
176 };
177
178 enum {
179 IMON_DISPLAY_TYPE_AUTO = 0,
180 IMON_DISPLAY_TYPE_VFD = 1,
181 IMON_DISPLAY_TYPE_LCD = 2,
182 IMON_DISPLAY_TYPE_VGA = 3,
183 IMON_DISPLAY_TYPE_NONE = 4,
184 };
185
186 enum {
187 IMON_KEY_IMON = 0,
188 IMON_KEY_MCE = 1,
189 IMON_KEY_PANEL = 2,
190 };
191
192 static struct usb_class_driver imon_vfd_class = {
193 .name = DEVICE_NAME,
194 .fops = &vfd_fops,
195 .minor_base = DISPLAY_MINOR_BASE,
196 };
197
198 static struct usb_class_driver imon_lcd_class = {
199 .name = DEVICE_NAME,
200 .fops = &lcd_fops,
201 .minor_base = DISPLAY_MINOR_BASE,
202 };
203
204 /* imon receiver front panel/knob key table */
205 static const struct imon_usb_dev_descr imon_default_table = {
206 .flags = IMON_NO_FLAGS,
207 .key_table = {
208 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
209 { 0x000000001200ffeell, KEY_UP },
210 { 0x000000001300ffeell, KEY_DOWN },
211 { 0x000000001400ffeell, KEY_LEFT },
212 { 0x000000001500ffeell, KEY_RIGHT },
213 { 0x000000001600ffeell, KEY_ENTER },
214 { 0x000000001700ffeell, KEY_ESC },
215 { 0x000000001f00ffeell, KEY_AUDIO },
216 { 0x000000002000ffeell, KEY_VIDEO },
217 { 0x000000002100ffeell, KEY_CAMERA },
218 { 0x000000002700ffeell, KEY_DVD },
219 { 0x000000002300ffeell, KEY_TV },
220 { 0x000000002b00ffeell, KEY_EXIT },
221 { 0x000000002c00ffeell, KEY_SELECT },
222 { 0x000000002d00ffeell, KEY_MENU },
223 { 0x000000000500ffeell, KEY_PREVIOUS },
224 { 0x000000000700ffeell, KEY_REWIND },
225 { 0x000000000400ffeell, KEY_STOP },
226 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
227 { 0x000000000800ffeell, KEY_FASTFORWARD },
228 { 0x000000000600ffeell, KEY_NEXT },
229 { 0x000000010000ffeell, KEY_RIGHT },
230 { 0x000001000000ffeell, KEY_LEFT },
231 { 0x000000003d00ffeell, KEY_SELECT },
232 { 0x000100000000ffeell, KEY_VOLUMEUP },
233 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
234 { 0x000000000100ffeell, KEY_MUTE },
235 /* 0xffdc iMON MCE VFD */
236 { 0x00010000ffffffeell, KEY_VOLUMEUP },
237 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
238 { 0x00000001ffffffeell, KEY_MUTE },
239 { 0x0000000fffffffeell, KEY_MEDIA },
240 { 0x00000012ffffffeell, KEY_UP },
241 { 0x00000013ffffffeell, KEY_DOWN },
242 { 0x00000014ffffffeell, KEY_LEFT },
243 { 0x00000015ffffffeell, KEY_RIGHT },
244 { 0x00000016ffffffeell, KEY_ENTER },
245 { 0x00000017ffffffeell, KEY_ESC },
246 /* iMON Knob values */
247 { 0x000100ffffffffeell, KEY_VOLUMEUP },
248 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
249 { 0x000008ffffffffeell, KEY_MUTE },
250 { 0, KEY_RESERVED },
251 }
252 };
253
254 static const struct imon_usb_dev_descr imon_OEM_VFD = {
255 .flags = IMON_NEED_20MS_PKT_DELAY,
256 .key_table = {
257 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
258 { 0x000000001200ffeell, KEY_UP },
259 { 0x000000001300ffeell, KEY_DOWN },
260 { 0x000000001400ffeell, KEY_LEFT },
261 { 0x000000001500ffeell, KEY_RIGHT },
262 { 0x000000001600ffeell, KEY_ENTER },
263 { 0x000000001700ffeell, KEY_ESC },
264 { 0x000000001f00ffeell, KEY_AUDIO },
265 { 0x000000002b00ffeell, KEY_EXIT },
266 { 0x000000002c00ffeell, KEY_SELECT },
267 { 0x000000002d00ffeell, KEY_MENU },
268 { 0x000000000500ffeell, KEY_PREVIOUS },
269 { 0x000000000700ffeell, KEY_REWIND },
270 { 0x000000000400ffeell, KEY_STOP },
271 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
272 { 0x000000000800ffeell, KEY_FASTFORWARD },
273 { 0x000000000600ffeell, KEY_NEXT },
274 { 0x000000010000ffeell, KEY_RIGHT },
275 { 0x000001000000ffeell, KEY_LEFT },
276 { 0x000000003d00ffeell, KEY_SELECT },
277 { 0x000100000000ffeell, KEY_VOLUMEUP },
278 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
279 { 0x000000000100ffeell, KEY_MUTE },
280 /* 0xffdc iMON MCE VFD */
281 { 0x00010000ffffffeell, KEY_VOLUMEUP },
282 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
283 { 0x00000001ffffffeell, KEY_MUTE },
284 { 0x0000000fffffffeell, KEY_MEDIA },
285 { 0x00000012ffffffeell, KEY_UP },
286 { 0x00000013ffffffeell, KEY_DOWN },
287 { 0x00000014ffffffeell, KEY_LEFT },
288 { 0x00000015ffffffeell, KEY_RIGHT },
289 { 0x00000016ffffffeell, KEY_ENTER },
290 { 0x00000017ffffffeell, KEY_ESC },
291 /* iMON Knob values */
292 { 0x000100ffffffffeell, KEY_VOLUMEUP },
293 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
294 { 0x000008ffffffffeell, KEY_MUTE },
295 { 0, KEY_RESERVED },
296 }
297 };
298
299 /* imon receiver front panel/knob key table for DH102*/
300 static const struct imon_usb_dev_descr imon_DH102 = {
301 .flags = IMON_NO_FLAGS,
302 .key_table = {
303 { 0x000100000000ffeell, KEY_VOLUMEUP },
304 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
305 { 0x000000010000ffeell, KEY_MUTE },
306 { 0x0000000f0000ffeell, KEY_MEDIA },
307 { 0x000000120000ffeell, KEY_UP },
308 { 0x000000130000ffeell, KEY_DOWN },
309 { 0x000000140000ffeell, KEY_LEFT },
310 { 0x000000150000ffeell, KEY_RIGHT },
311 { 0x000000160000ffeell, KEY_ENTER },
312 { 0x000000170000ffeell, KEY_ESC },
313 { 0x0000002b0000ffeell, KEY_EXIT },
314 { 0x0000002c0000ffeell, KEY_SELECT },
315 { 0x0000002d0000ffeell, KEY_MENU },
316 { 0, KEY_RESERVED }
317 }
318 };
319
320 /* imon ultrabay front panel key table */
321 static const struct imon_usb_dev_descr ultrabay_table = {
322 .flags = IMON_SUPPRESS_REPEATED_KEYS,
323 .key_table = {
324 { 0x0000000f0000ffeell, KEY_MEDIA }, /* Go */
325 { 0x000000000100ffeell, KEY_UP },
326 { 0x000000000001ffeell, KEY_DOWN },
327 { 0x000000160000ffeell, KEY_ENTER },
328 { 0x0000001f0000ffeell, KEY_AUDIO }, /* Music */
329 { 0x000000200000ffeell, KEY_VIDEO }, /* Movie */
330 { 0x000000210000ffeell, KEY_CAMERA }, /* Photo */
331 { 0x000000270000ffeell, KEY_DVD }, /* DVD */
332 { 0x000000230000ffeell, KEY_TV }, /* TV */
333 { 0x000000050000ffeell, KEY_PREVIOUS }, /* Previous */
334 { 0x000000070000ffeell, KEY_REWIND },
335 { 0x000000040000ffeell, KEY_STOP },
336 { 0x000000020000ffeell, KEY_PLAYPAUSE },
337 { 0x000000080000ffeell, KEY_FASTFORWARD },
338 { 0x000000060000ffeell, KEY_NEXT }, /* Next */
339 { 0x000100000000ffeell, KEY_VOLUMEUP },
340 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
341 { 0x000000010000ffeell, KEY_MUTE },
342 { 0, KEY_RESERVED },
343 }
344 };
345
346 /*
347 * USB Device ID for iMON USB Control Boards
348 *
349 * The Windows drivers contain 6 different inf files, more or less one for
350 * each new device until the 0x0034-0x0046 devices, which all use the same
351 * driver. Some of the devices in the 34-46 range haven't been definitively
352 * identified yet. Early devices have either a TriGem Computer, Inc. or a
353 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
354 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
355 * the ffdc and later devices, which do onboard decoding.
356 */
357 static const struct usb_device_id imon_usb_id_table[] = {
358 /*
359 * Several devices with this same device ID, all use iMON_PAD.inf
360 * SoundGraph iMON PAD (IR & VFD)
361 * SoundGraph iMON PAD (IR & LCD)
362 * SoundGraph iMON Knob (IR only)
363 */
364 { USB_DEVICE(0x15c2, 0xffdc),
365 .driver_info = (unsigned long)&imon_default_table },
366
367 /*
368 * Newer devices, all driven by the latest iMON Windows driver, full
369 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
370 * Need user input to fill in details on unknown devices.
371 */
372 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
373 { USB_DEVICE(0x15c2, 0x0034),
374 .driver_info = (unsigned long)&imon_DH102 },
375 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
376 { USB_DEVICE(0x15c2, 0x0035),
377 .driver_info = (unsigned long)&imon_default_table},
378 /* SoundGraph iMON OEM VFD (IR & VFD) */
379 { USB_DEVICE(0x15c2, 0x0036),
380 .driver_info = (unsigned long)&imon_OEM_VFD },
381 /* device specifics unknown */
382 { USB_DEVICE(0x15c2, 0x0037),
383 .driver_info = (unsigned long)&imon_default_table},
384 /* SoundGraph iMON OEM LCD (IR & LCD) */
385 { USB_DEVICE(0x15c2, 0x0038),
386 .driver_info = (unsigned long)&imon_default_table},
387 /* SoundGraph iMON UltraBay (IR & LCD) */
388 { USB_DEVICE(0x15c2, 0x0039),
389 .driver_info = (unsigned long)&imon_default_table},
390 /* device specifics unknown */
391 { USB_DEVICE(0x15c2, 0x003a),
392 .driver_info = (unsigned long)&imon_default_table},
393 /* device specifics unknown */
394 { USB_DEVICE(0x15c2, 0x003b),
395 .driver_info = (unsigned long)&imon_default_table},
396 /* SoundGraph iMON OEM Inside (IR only) */
397 { USB_DEVICE(0x15c2, 0x003c),
398 .driver_info = (unsigned long)&imon_default_table},
399 /* device specifics unknown */
400 { USB_DEVICE(0x15c2, 0x003d),
401 .driver_info = (unsigned long)&imon_default_table},
402 /* device specifics unknown */
403 { USB_DEVICE(0x15c2, 0x003e),
404 .driver_info = (unsigned long)&imon_default_table},
405 /* device specifics unknown */
406 { USB_DEVICE(0x15c2, 0x003f),
407 .driver_info = (unsigned long)&imon_default_table},
408 /* device specifics unknown */
409 { USB_DEVICE(0x15c2, 0x0040),
410 .driver_info = (unsigned long)&imon_default_table},
411 /* SoundGraph iMON MINI (IR only) */
412 { USB_DEVICE(0x15c2, 0x0041),
413 .driver_info = (unsigned long)&imon_default_table},
414 /* Antec Veris Multimedia Station EZ External (IR only) */
415 { USB_DEVICE(0x15c2, 0x0042),
416 .driver_info = (unsigned long)&imon_default_table},
417 /* Antec Veris Multimedia Station Basic Internal (IR only) */
418 { USB_DEVICE(0x15c2, 0x0043),
419 .driver_info = (unsigned long)&imon_default_table},
420 /* Antec Veris Multimedia Station Elite (IR & VFD) */
421 { USB_DEVICE(0x15c2, 0x0044),
422 .driver_info = (unsigned long)&imon_default_table},
423 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
424 { USB_DEVICE(0x15c2, 0x0045),
425 .driver_info = (unsigned long)&imon_default_table},
426 /* device specifics unknown */
427 { USB_DEVICE(0x15c2, 0x0046),
428 .driver_info = (unsigned long)&imon_default_table},
429 {}
430 };
431
432 /* USB Device data */
433 static struct usb_driver imon_driver = {
434 .name = MOD_NAME,
435 .probe = imon_probe,
436 .disconnect = imon_disconnect,
437 .suspend = imon_suspend,
438 .resume = imon_resume,
439 .id_table = imon_usb_id_table,
440 };
441
442 /* to prevent races between open() and disconnect(), probing, etc */
443 static DEFINE_MUTEX(driver_lock);
444
445 /* Module bookkeeping bits */
446 MODULE_AUTHOR(MOD_AUTHOR);
447 MODULE_DESCRIPTION(MOD_DESC);
448 MODULE_VERSION(MOD_VERSION);
449 MODULE_LICENSE("GPL");
450 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
451
452 static bool debug;
453 module_param(debug, bool, S_IRUGO | S_IWUSR);
454 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
455
456 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
457 static int display_type;
458 module_param(display_type, int, S_IRUGO);
459 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
460
461 static int pad_stabilize = 1;
462 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
463 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD presses in arrow key mode. 0=disable, 1=enable (default).");
464
465 /*
466 * In certain use cases, mouse mode isn't really helpful, and could actually
467 * cause confusion, so allow disabling it when the IR device is open.
468 */
469 static bool nomouse;
470 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
471 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is open. 0=don't disable, 1=disable. (default: don't disable)");
472
473 /* threshold at which a pad push registers as an arrow key in kbd mode */
474 static int pad_thresh;
475 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
476 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)");
477
478
479 static void free_imon_context(struct imon_context *ictx)
480 {
481 struct device *dev = ictx->dev;
482
483 usb_free_urb(ictx->tx_urb);
484 usb_free_urb(ictx->rx_urb_intf0);
485 usb_free_urb(ictx->rx_urb_intf1);
486 kfree(ictx);
487
488 dev_dbg(dev, "%s: iMON context freed\n", __func__);
489 }
490
491 /*
492 * Called when the Display device (e.g. /dev/lcd0)
493 * is opened by the application.
494 */
495 static int display_open(struct inode *inode, struct file *file)
496 {
497 struct usb_interface *interface;
498 struct imon_context *ictx = NULL;
499 int subminor;
500 int retval = 0;
501
502 /* prevent races with disconnect */
503 mutex_lock(&driver_lock);
504
505 subminor = iminor(inode);
506 interface = usb_find_interface(&imon_driver, subminor);
507 if (!interface) {
508 pr_err("could not find interface for minor %d\n", subminor);
509 retval = -ENODEV;
510 goto exit;
511 }
512 ictx = usb_get_intfdata(interface);
513
514 if (!ictx) {
515 pr_err("no context found for minor %d\n", subminor);
516 retval = -ENODEV;
517 goto exit;
518 }
519
520 mutex_lock(&ictx->lock);
521
522 if (!ictx->display_supported) {
523 pr_err("display not supported by device\n");
524 retval = -ENODEV;
525 } else if (ictx->display_isopen) {
526 pr_err("display port is already open\n");
527 retval = -EBUSY;
528 } else {
529 ictx->display_isopen = true;
530 file->private_data = ictx;
531 dev_dbg(ictx->dev, "display port opened\n");
532 }
533
534 mutex_unlock(&ictx->lock);
535
536 exit:
537 mutex_unlock(&driver_lock);
538 return retval;
539 }
540
541 /*
542 * Called when the display device (e.g. /dev/lcd0)
543 * is closed by the application.
544 */
545 static int display_close(struct inode *inode, struct file *file)
546 {
547 struct imon_context *ictx = NULL;
548 int retval = 0;
549
550 ictx = file->private_data;
551
552 if (!ictx) {
553 pr_err("no context for device\n");
554 return -ENODEV;
555 }
556
557 mutex_lock(&ictx->lock);
558
559 if (!ictx->display_supported) {
560 pr_err("display not supported by device\n");
561 retval = -ENODEV;
562 } else if (!ictx->display_isopen) {
563 pr_err("display is not open\n");
564 retval = -EIO;
565 } else {
566 ictx->display_isopen = false;
567 dev_dbg(ictx->dev, "display port closed\n");
568 }
569
570 mutex_unlock(&ictx->lock);
571 return retval;
572 }
573
574 /*
575 * Sends a packet to the device -- this function must be called with
576 * ictx->lock held, or its unlock/lock sequence while waiting for tx
577 * to complete can/will lead to a deadlock.
578 */
579 static int send_packet(struct imon_context *ictx)
580 {
581 unsigned int pipe;
582 unsigned long timeout;
583 int interval = 0;
584 int retval = 0;
585 struct usb_ctrlrequest *control_req = NULL;
586
587 /* Check if we need to use control or interrupt urb */
588 if (!ictx->tx_control) {
589 pipe = usb_sndintpipe(ictx->usbdev_intf0,
590 ictx->tx_endpoint->bEndpointAddress);
591 interval = ictx->tx_endpoint->bInterval;
592
593 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
594 ictx->usb_tx_buf,
595 sizeof(ictx->usb_tx_buf),
596 usb_tx_callback, ictx, interval);
597
598 ictx->tx_urb->actual_length = 0;
599 } else {
600 /* fill request into kmalloc'ed space: */
601 control_req = kmalloc(sizeof(*control_req), GFP_KERNEL);
602 if (control_req == NULL)
603 return -ENOMEM;
604
605 /* setup packet is '21 09 0200 0001 0008' */
606 control_req->bRequestType = 0x21;
607 control_req->bRequest = 0x09;
608 control_req->wValue = cpu_to_le16(0x0200);
609 control_req->wIndex = cpu_to_le16(0x0001);
610 control_req->wLength = cpu_to_le16(0x0008);
611
612 /* control pipe is endpoint 0x00 */
613 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
614
615 /* build the control urb */
616 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
617 pipe, (unsigned char *)control_req,
618 ictx->usb_tx_buf,
619 sizeof(ictx->usb_tx_buf),
620 usb_tx_callback, ictx);
621 ictx->tx_urb->actual_length = 0;
622 }
623
624 reinit_completion(&ictx->tx.finished);
625 ictx->tx.busy = true;
626 smp_rmb(); /* ensure later readers know we're busy */
627
628 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
629 if (retval) {
630 ictx->tx.busy = false;
631 smp_rmb(); /* ensure later readers know we're not busy */
632 pr_err_ratelimited("error submitting urb(%d)\n", retval);
633 } else {
634 /* Wait for transmission to complete (or abort) */
635 mutex_unlock(&ictx->lock);
636 retval = wait_for_completion_interruptible(
637 &ictx->tx.finished);
638 if (retval) {
639 usb_kill_urb(ictx->tx_urb);
640 pr_err_ratelimited("task interrupted\n");
641 }
642 mutex_lock(&ictx->lock);
643
644 retval = ictx->tx.status;
645 if (retval)
646 pr_err_ratelimited("packet tx failed (%d)\n", retval);
647 }
648
649 kfree(control_req);
650
651 /*
652 * Induce a mandatory delay before returning, as otherwise,
653 * send_packet can get called so rapidly as to overwhelm the device,
654 * particularly on faster systems and/or those with quirky usb.
655 */
656 timeout = msecs_to_jiffies(ictx->send_packet_delay);
657 set_current_state(TASK_INTERRUPTIBLE);
658 schedule_timeout(timeout);
659
660 return retval;
661 }
662
663 /*
664 * Sends an associate packet to the iMON 2.4G.
665 *
666 * This might not be such a good idea, since it has an id collision with
667 * some versions of the "IR & VFD" combo. The only way to determine if it
668 * is an RF version is to look at the product description string. (Which
669 * we currently do not fetch).
670 */
671 static int send_associate_24g(struct imon_context *ictx)
672 {
673 int retval;
674 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
675 0x00, 0x00, 0x00, 0x20 };
676
677 if (!ictx) {
678 pr_err("no context for device\n");
679 return -ENODEV;
680 }
681
682 if (!ictx->dev_present_intf0) {
683 pr_err("no iMON device present\n");
684 return -ENODEV;
685 }
686
687 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
688 retval = send_packet(ictx);
689
690 return retval;
691 }
692
693 /*
694 * Sends packets to setup and show clock on iMON display
695 *
696 * Arguments: year - last 2 digits of year, month - 1..12,
697 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
698 * hour - 0..23, minute - 0..59, second - 0..59
699 */
700 static int send_set_imon_clock(struct imon_context *ictx,
701 unsigned int year, unsigned int month,
702 unsigned int day, unsigned int dow,
703 unsigned int hour, unsigned int minute,
704 unsigned int second)
705 {
706 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
707 int retval = 0;
708 int i;
709
710 if (!ictx) {
711 pr_err("no context for device\n");
712 return -ENODEV;
713 }
714
715 switch (ictx->display_type) {
716 case IMON_DISPLAY_TYPE_LCD:
717 clock_enable_pkt[0][0] = 0x80;
718 clock_enable_pkt[0][1] = year;
719 clock_enable_pkt[0][2] = month-1;
720 clock_enable_pkt[0][3] = day;
721 clock_enable_pkt[0][4] = hour;
722 clock_enable_pkt[0][5] = minute;
723 clock_enable_pkt[0][6] = second;
724
725 clock_enable_pkt[1][0] = 0x80;
726 clock_enable_pkt[1][1] = 0;
727 clock_enable_pkt[1][2] = 0;
728 clock_enable_pkt[1][3] = 0;
729 clock_enable_pkt[1][4] = 0;
730 clock_enable_pkt[1][5] = 0;
731 clock_enable_pkt[1][6] = 0;
732
733 if (ictx->product == 0xffdc) {
734 clock_enable_pkt[0][7] = 0x50;
735 clock_enable_pkt[1][7] = 0x51;
736 } else {
737 clock_enable_pkt[0][7] = 0x88;
738 clock_enable_pkt[1][7] = 0x8a;
739 }
740
741 break;
742
743 case IMON_DISPLAY_TYPE_VFD:
744 clock_enable_pkt[0][0] = year;
745 clock_enable_pkt[0][1] = month-1;
746 clock_enable_pkt[0][2] = day;
747 clock_enable_pkt[0][3] = dow;
748 clock_enable_pkt[0][4] = hour;
749 clock_enable_pkt[0][5] = minute;
750 clock_enable_pkt[0][6] = second;
751 clock_enable_pkt[0][7] = 0x40;
752
753 clock_enable_pkt[1][0] = 0;
754 clock_enable_pkt[1][1] = 0;
755 clock_enable_pkt[1][2] = 1;
756 clock_enable_pkt[1][3] = 0;
757 clock_enable_pkt[1][4] = 0;
758 clock_enable_pkt[1][5] = 0;
759 clock_enable_pkt[1][6] = 0;
760 clock_enable_pkt[1][7] = 0x42;
761
762 break;
763
764 default:
765 return -ENODEV;
766 }
767
768 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
769 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
770 retval = send_packet(ictx);
771 if (retval) {
772 pr_err("send_packet failed for packet %d\n", i);
773 break;
774 }
775 }
776
777 return retval;
778 }
779
780 /*
781 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
782 */
783 static ssize_t show_associate_remote(struct device *d,
784 struct device_attribute *attr,
785 char *buf)
786 {
787 struct imon_context *ictx = dev_get_drvdata(d);
788
789 if (!ictx)
790 return -ENODEV;
791
792 mutex_lock(&ictx->lock);
793 if (ictx->rf_isassociating)
794 strscpy(buf, "associating\n", PAGE_SIZE);
795 else
796 strscpy(buf, "closed\n", PAGE_SIZE);
797
798 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");
799 mutex_unlock(&ictx->lock);
800 return strlen(buf);
801 }
802
803 static ssize_t store_associate_remote(struct device *d,
804 struct device_attribute *attr,
805 const char *buf, size_t count)
806 {
807 struct imon_context *ictx;
808
809 ictx = dev_get_drvdata(d);
810
811 if (!ictx)
812 return -ENODEV;
813
814 mutex_lock(&ictx->lock);
815 ictx->rf_isassociating = true;
816 send_associate_24g(ictx);
817 mutex_unlock(&ictx->lock);
818
819 return count;
820 }
821
822 /*
823 * sysfs functions to control internal imon clock
824 */
825 static ssize_t show_imon_clock(struct device *d,
826 struct device_attribute *attr, char *buf)
827 {
828 struct imon_context *ictx = dev_get_drvdata(d);
829 size_t len;
830
831 if (!ictx)
832 return -ENODEV;
833
834 mutex_lock(&ictx->lock);
835
836 if (!ictx->display_supported) {
837 len = snprintf(buf, PAGE_SIZE, "Not supported.");
838 } else {
839 len = snprintf(buf, PAGE_SIZE,
840 "To set the clock on your iMON display:\n"
841 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
842 "%s", ictx->display_isopen ?
843 "\nNOTE: imon device must be closed\n" : "");
844 }
845
846 mutex_unlock(&ictx->lock);
847
848 return len;
849 }
850
851 static ssize_t store_imon_clock(struct device *d,
852 struct device_attribute *attr,
853 const char *buf, size_t count)
854 {
855 struct imon_context *ictx = dev_get_drvdata(d);
856 ssize_t retval;
857 unsigned int year, month, day, dow, hour, minute, second;
858
859 if (!ictx)
860 return -ENODEV;
861
862 mutex_lock(&ictx->lock);
863
864 if (!ictx->display_supported) {
865 retval = -ENODEV;
866 goto exit;
867 } else if (ictx->display_isopen) {
868 retval = -EBUSY;
869 goto exit;
870 }
871
872 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
873 &hour, &minute, &second) != 7) {
874 retval = -EINVAL;
875 goto exit;
876 }
877
878 if ((month < 1 || month > 12) ||
879 (day < 1 || day > 31) || (dow > 6) ||
880 (hour > 23) || (minute > 59) || (second > 59)) {
881 retval = -EINVAL;
882 goto exit;
883 }
884
885 retval = send_set_imon_clock(ictx, year, month, day, dow,
886 hour, minute, second);
887 if (retval)
888 goto exit;
889
890 retval = count;
891 exit:
892 mutex_unlock(&ictx->lock);
893
894 return retval;
895 }
896
897
898 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
899 store_imon_clock);
900
901 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
902 store_associate_remote);
903
904 static struct attribute *imon_display_sysfs_entries[] = {
905 &dev_attr_imon_clock.attr,
906 NULL
907 };
908
909 static const struct attribute_group imon_display_attr_group = {
910 .attrs = imon_display_sysfs_entries
911 };
912
913 static struct attribute *imon_rf_sysfs_entries[] = {
914 &dev_attr_associate_remote.attr,
915 NULL
916 };
917
918 static const struct attribute_group imon_rf_attr_group = {
919 .attrs = imon_rf_sysfs_entries
920 };
921
922 /*
923 * Writes data to the VFD. The iMON VFD is 2x16 characters
924 * and requires data in 5 consecutive USB interrupt packets,
925 * each packet but the last carrying 7 bytes.
926 *
927 * I don't know if the VFD board supports features such as
928 * scrolling, clearing rows, blanking, etc. so at
929 * the caller must provide a full screen of data. If fewer
930 * than 32 bytes are provided spaces will be appended to
931 * generate a full screen.
932 */
933 static ssize_t vfd_write(struct file *file, const char __user *buf,
934 size_t n_bytes, loff_t *pos)
935 {
936 int i;
937 int offset;
938 int seq;
939 int retval = 0;
940 struct imon_context *ictx;
941 static const unsigned char vfd_packet6[] = {
942 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
943
944 ictx = file->private_data;
945 if (!ictx) {
946 pr_err_ratelimited("no context for device\n");
947 return -ENODEV;
948 }
949
950 mutex_lock(&ictx->lock);
951
952 if (!ictx->dev_present_intf0) {
953 pr_err_ratelimited("no iMON device present\n");
954 retval = -ENODEV;
955 goto exit;
956 }
957
958 if (n_bytes <= 0 || n_bytes > 32) {
959 pr_err_ratelimited("invalid payload size\n");
960 retval = -EINVAL;
961 goto exit;
962 }
963
964 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
965 retval = -EFAULT;
966 goto exit;
967 }
968
969 /* Pad with spaces */
970 for (i = n_bytes; i < 32; ++i)
971 ictx->tx.data_buf[i] = ' ';
972
973 for (i = 32; i < 35; ++i)
974 ictx->tx.data_buf[i] = 0xFF;
975
976 offset = 0;
977 seq = 0;
978
979 do {
980 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
981 ictx->usb_tx_buf[7] = (unsigned char) seq;
982
983 retval = send_packet(ictx);
984 if (retval) {
985 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
986 goto exit;
987 } else {
988 seq += 2;
989 offset += 7;
990 }
991
992 } while (offset < 35);
993
994 /* Send packet #6 */
995 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
996 ictx->usb_tx_buf[7] = (unsigned char) seq;
997 retval = send_packet(ictx);
998 if (retval)
999 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
1000
1001 exit:
1002 mutex_unlock(&ictx->lock);
1003
1004 return (!retval) ? n_bytes : retval;
1005 }
1006
1007 /*
1008 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
1009 * packets. We accept data as 16 hexadecimal digits, followed by a
1010 * newline (to make it easy to drive the device from a command-line
1011 * -- even though the actual binary data is a bit complicated).
1012 *
1013 * The device itself is not a "traditional" text-mode display. It's
1014 * actually a 16x96 pixel bitmap display. That means if you want to
1015 * display text, you've got to have your own "font" and translate the
1016 * text into bitmaps for display. This is really flexible (you can
1017 * display whatever diacritics you need, and so on), but it's also
1018 * a lot more complicated than most LCDs...
1019 */
1020 static ssize_t lcd_write(struct file *file, const char __user *buf,
1021 size_t n_bytes, loff_t *pos)
1022 {
1023 int retval = 0;
1024 struct imon_context *ictx;
1025
1026 ictx = file->private_data;
1027 if (!ictx) {
1028 pr_err_ratelimited("no context for device\n");
1029 return -ENODEV;
1030 }
1031
1032 mutex_lock(&ictx->lock);
1033
1034 if (!ictx->display_supported) {
1035 pr_err_ratelimited("no iMON display present\n");
1036 retval = -ENODEV;
1037 goto exit;
1038 }
1039
1040 if (n_bytes != 8) {
1041 pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
1042 (int)n_bytes);
1043 retval = -EINVAL;
1044 goto exit;
1045 }
1046
1047 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
1048 retval = -EFAULT;
1049 goto exit;
1050 }
1051
1052 retval = send_packet(ictx);
1053 if (retval) {
1054 pr_err_ratelimited("send packet failed!\n");
1055 goto exit;
1056 } else {
1057 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
1058 __func__, (int) n_bytes);
1059 }
1060 exit:
1061 mutex_unlock(&ictx->lock);
1062 return (!retval) ? n_bytes : retval;
1063 }
1064
1065 /*
1066 * Callback function for USB core API: transmit data
1067 */
1068 static void usb_tx_callback(struct urb *urb)
1069 {
1070 struct imon_context *ictx;
1071
1072 if (!urb)
1073 return;
1074 ictx = (struct imon_context *)urb->context;
1075 if (!ictx)
1076 return;
1077
1078 ictx->tx.status = urb->status;
1079
1080 /* notify waiters that write has finished */
1081 ictx->tx.busy = false;
1082 smp_rmb(); /* ensure later readers know we're not busy */
1083 complete(&ictx->tx.finished);
1084 }
1085
1086 /*
1087 * report touchscreen input
1088 */
1089 static void imon_touch_display_timeout(struct timer_list *t)
1090 {
1091 struct imon_context *ictx = from_timer(ictx, t, ttimer);
1092
1093 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
1094 return;
1095
1096 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1097 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1098 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
1099 input_sync(ictx->touch);
1100 }
1101
1102 /*
1103 * iMON IR receivers support two different signal sets -- those used by
1104 * the iMON remotes, and those used by the Windows MCE remotes (which is
1105 * really just RC-6), but only one or the other at a time, as the signals
1106 * are decoded onboard the receiver.
1107 *
1108 * This function gets called two different ways, one way is from
1109 * rc_register_device, for initial protocol selection/setup, and the other is
1110 * via a userspace-initiated protocol change request, either by direct sysfs
1111 * prodding or by something like ir-keytable. In the rc_register_device case,
1112 * the imon context lock is already held, but when initiated from userspace,
1113 * it is not, so we must acquire it prior to calling send_packet, which
1114 * requires that the lock is held.
1115 */
1116 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto)
1117 {
1118 int retval;
1119 struct imon_context *ictx = rc->priv;
1120 struct device *dev = ictx->dev;
1121 bool unlock = false;
1122 unsigned char ir_proto_packet[] = {
1123 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1124
1125 if (*rc_proto && !(*rc_proto & rc->allowed_protocols))
1126 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n");
1127
1128 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) {
1129 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1130 ir_proto_packet[0] = 0x01;
1131 *rc_proto = RC_PROTO_BIT_RC6_MCE;
1132 } else if (*rc_proto & RC_PROTO_BIT_IMON) {
1133 dev_dbg(dev, "Configuring IR receiver for iMON 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_proto = RC_PROTO_BIT_IMON;
1138 } else {
1139 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n");
1140 if (!pad_stabilize)
1141 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1142 /* ir_proto_packet[0] = 0x00; // already the default */
1143 *rc_proto = RC_PROTO_BIT_IMON;
1144 }
1145
1146 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1147
1148 if (!mutex_is_locked(&ictx->lock)) {
1149 unlock = true;
1150 mutex_lock(&ictx->lock);
1151 }
1152
1153 retval = send_packet(ictx);
1154 if (retval)
1155 goto out;
1156
1157 ictx->rc_proto = *rc_proto;
1158 ictx->pad_mouse = false;
1159
1160 out:
1161 if (unlock)
1162 mutex_unlock(&ictx->lock);
1163
1164 return retval;
1165 }
1166
1167 /*
1168 * The directional pad behaves a bit differently, depending on whether this is
1169 * one of the older ffdc devices or a newer device. Newer devices appear to
1170 * have a higher resolution matrix for more precise mouse movement, but it
1171 * makes things overly sensitive in keyboard mode, so we do some interesting
1172 * contortions to make it less touchy. Older devices run through the same
1173 * routine with shorter timeout and a smaller threshold.
1174 */
1175 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1176 {
1177 ktime_t ct;
1178 static ktime_t prev_time;
1179 static ktime_t hit_time;
1180 static int x, y, prev_result, hits;
1181 int result = 0;
1182 long msec, msec_hit;
1183
1184 ct = ktime_get();
1185 msec = ktime_ms_delta(ct, prev_time);
1186 msec_hit = ktime_ms_delta(ct, hit_time);
1187
1188 if (msec > 100) {
1189 x = 0;
1190 y = 0;
1191 hits = 0;
1192 }
1193
1194 x += a;
1195 y += b;
1196
1197 prev_time = ct;
1198
1199 if (abs(x) > threshold || abs(y) > threshold) {
1200 if (abs(y) > abs(x))
1201 result = (y > 0) ? 0x7F : 0x80;
1202 else
1203 result = (x > 0) ? 0x7F00 : 0x8000;
1204
1205 x = 0;
1206 y = 0;
1207
1208 if (result == prev_result) {
1209 hits++;
1210
1211 if (hits > 3) {
1212 switch (result) {
1213 case 0x7F:
1214 y = 17 * threshold / 30;
1215 break;
1216 case 0x80:
1217 y -= 17 * threshold / 30;
1218 break;
1219 case 0x7F00:
1220 x = 17 * threshold / 30;
1221 break;
1222 case 0x8000:
1223 x -= 17 * threshold / 30;
1224 break;
1225 }
1226 }
1227
1228 if (hits == 2 && msec_hit < timeout) {
1229 result = 0;
1230 hits = 1;
1231 }
1232 } else {
1233 prev_result = result;
1234 hits = 1;
1235 hit_time = ct;
1236 }
1237 }
1238
1239 return result;
1240 }
1241
1242 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1243 {
1244 u32 keycode;
1245 u32 release;
1246 bool is_release_code = false;
1247
1248 /* Look for the initial press of a button */
1249 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1250 ictx->rc_toggle = 0x0;
1251 ictx->rc_scancode = scancode;
1252
1253 /* Look for the release of a button */
1254 if (keycode == KEY_RESERVED) {
1255 release = scancode & ~0x4000;
1256 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1257 if (keycode != KEY_RESERVED)
1258 is_release_code = true;
1259 }
1260
1261 ictx->release_code = is_release_code;
1262
1263 return keycode;
1264 }
1265
1266 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1267 {
1268 u32 keycode;
1269
1270 #define MCE_KEY_MASK 0x7000
1271 #define MCE_TOGGLE_BIT 0x8000
1272
1273 /*
1274 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1275 * (the toggle bit flipping between alternating key presses), while
1276 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1277 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1278 * but we can't or them into all codes, as some keys are decoded in
1279 * a different way w/o the same use of the toggle bit...
1280 */
1281 if (scancode & 0x80000000)
1282 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1283
1284 ictx->rc_scancode = scancode;
1285 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1286
1287 /* not used in mce mode, but make sure we know its false */
1288 ictx->release_code = false;
1289
1290 return keycode;
1291 }
1292
1293 static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code)
1294 {
1295 const struct imon_panel_key_table *key_table;
1296 u32 keycode = KEY_RESERVED;
1297 int i;
1298
1299 key_table = ictx->dev_descr->key_table;
1300
1301 for (i = 0; key_table[i].hw_code != 0; i++) {
1302 if (key_table[i].hw_code == (code | 0xffee)) {
1303 keycode = key_table[i].keycode;
1304 break;
1305 }
1306 }
1307 ictx->release_code = false;
1308 return keycode;
1309 }
1310
1311 static bool imon_mouse_event(struct imon_context *ictx,
1312 unsigned char *buf, int len)
1313 {
1314 signed char rel_x = 0x00, rel_y = 0x00;
1315 u8 right_shift = 1;
1316 bool mouse_input = true;
1317 int dir = 0;
1318 unsigned long flags;
1319
1320 spin_lock_irqsave(&ictx->kc_lock, flags);
1321
1322 /* newer iMON device PAD or mouse button */
1323 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1324 rel_x = buf[2];
1325 rel_y = buf[3];
1326 right_shift = 1;
1327 /* 0xffdc iMON PAD or mouse button input */
1328 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1329 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1330 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1331 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1332 if (buf[0] & 0x02)
1333 rel_x |= ~0x0f;
1334 rel_x = rel_x + rel_x / 2;
1335 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1336 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1337 if (buf[0] & 0x01)
1338 rel_y |= ~0x0f;
1339 rel_y = rel_y + rel_y / 2;
1340 right_shift = 2;
1341 /* some ffdc devices decode mouse buttons differently... */
1342 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1343 right_shift = 2;
1344 /* ch+/- buttons, which we use for an emulated scroll wheel */
1345 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1346 dir = 1;
1347 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1348 dir = -1;
1349 } else
1350 mouse_input = false;
1351
1352 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1353
1354 if (mouse_input) {
1355 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1356
1357 if (dir) {
1358 input_report_rel(ictx->idev, REL_WHEEL, dir);
1359 } else if (rel_x || rel_y) {
1360 input_report_rel(ictx->idev, REL_X, rel_x);
1361 input_report_rel(ictx->idev, REL_Y, rel_y);
1362 } else {
1363 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1364 input_report_key(ictx->idev, BTN_RIGHT,
1365 buf[1] >> right_shift & 0x1);
1366 }
1367 input_sync(ictx->idev);
1368 spin_lock_irqsave(&ictx->kc_lock, flags);
1369 ictx->last_keycode = ictx->kc;
1370 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1371 }
1372
1373 return mouse_input;
1374 }
1375
1376 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1377 {
1378 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1379 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1380 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1381 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1382 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1383 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1384 input_sync(ictx->touch);
1385 }
1386
1387 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1388 {
1389 int dir = 0;
1390 signed char rel_x = 0x00, rel_y = 0x00;
1391 u16 timeout, threshold;
1392 u32 scancode = KEY_RESERVED;
1393 unsigned long flags;
1394
1395 /*
1396 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1397 * contain a position coordinate (x,y), with each component ranging
1398 * from -14 to 14. We want to down-sample this to only 4 discrete values
1399 * for up/down/left/right arrow keys. Also, when you get too close to
1400 * diagonals, it has a tendency to jump back and forth, so lets try to
1401 * ignore when they get too close.
1402 */
1403 if (ictx->product != 0xffdc) {
1404 /* first, pad to 8 bytes so it conforms with everything else */
1405 buf[5] = buf[6] = buf[7] = 0;
1406 timeout = 500; /* in msecs */
1407 /* (2*threshold) x (2*threshold) square */
1408 threshold = pad_thresh ? pad_thresh : 28;
1409 rel_x = buf[2];
1410 rel_y = buf[3];
1411
1412 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
1413 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1414 dir = stabilize((int)rel_x, (int)rel_y,
1415 timeout, threshold);
1416 if (!dir) {
1417 spin_lock_irqsave(&ictx->kc_lock,
1418 flags);
1419 ictx->kc = KEY_UNKNOWN;
1420 spin_unlock_irqrestore(&ictx->kc_lock,
1421 flags);
1422 return;
1423 }
1424 buf[2] = dir & 0xFF;
1425 buf[3] = (dir >> 8) & 0xFF;
1426 scancode = be32_to_cpu(*((__be32 *)buf));
1427 }
1428 } else {
1429 /*
1430 * Hack alert: instead of using keycodes, we have
1431 * to use hard-coded scancodes here...
1432 */
1433 if (abs(rel_y) > abs(rel_x)) {
1434 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1435 buf[3] = 0;
1436 if (rel_y > 0)
1437 scancode = 0x01007f00; /* KEY_DOWN */
1438 else
1439 scancode = 0x01008000; /* KEY_UP */
1440 } else {
1441 buf[2] = 0;
1442 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1443 if (rel_x > 0)
1444 scancode = 0x0100007f; /* KEY_RIGHT */
1445 else
1446 scancode = 0x01000080; /* KEY_LEFT */
1447 }
1448 }
1449
1450 /*
1451 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1452 * device (15c2:ffdc). The remote generates various codes from
1453 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1454 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1455 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1456 * reversed endianness. Extract direction from buffer, rotate endianness,
1457 * adjust sign and feed the values into stabilize(). The resulting codes
1458 * will be 0x01008000, 0x01007F00, which match the newer devices.
1459 */
1460 } else {
1461 timeout = 10; /* in msecs */
1462 /* (2*threshold) x (2*threshold) square */
1463 threshold = pad_thresh ? pad_thresh : 15;
1464
1465 /* buf[1] is x */
1466 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1467 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1468 if (buf[0] & 0x02)
1469 rel_x |= ~0x10+1;
1470 /* buf[2] is y */
1471 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1472 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1473 if (buf[0] & 0x01)
1474 rel_y |= ~0x10+1;
1475
1476 buf[0] = 0x01;
1477 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1478
1479 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
1480 dir = stabilize((int)rel_x, (int)rel_y,
1481 timeout, threshold);
1482 if (!dir) {
1483 spin_lock_irqsave(&ictx->kc_lock, flags);
1484 ictx->kc = KEY_UNKNOWN;
1485 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1486 return;
1487 }
1488 buf[2] = dir & 0xFF;
1489 buf[3] = (dir >> 8) & 0xFF;
1490 scancode = be32_to_cpu(*((__be32 *)buf));
1491 } else {
1492 /*
1493 * Hack alert: instead of using keycodes, we have
1494 * to use hard-coded scancodes here...
1495 */
1496 if (abs(rel_y) > abs(rel_x)) {
1497 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1498 buf[3] = 0;
1499 if (rel_y > 0)
1500 scancode = 0x01007f00; /* KEY_DOWN */
1501 else
1502 scancode = 0x01008000; /* KEY_UP */
1503 } else {
1504 buf[2] = 0;
1505 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1506 if (rel_x > 0)
1507 scancode = 0x0100007f; /* KEY_RIGHT */
1508 else
1509 scancode = 0x01000080; /* KEY_LEFT */
1510 }
1511 }
1512 }
1513
1514 if (scancode) {
1515 spin_lock_irqsave(&ictx->kc_lock, flags);
1516 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1517 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1518 }
1519 }
1520
1521 /*
1522 * figure out if these is a press or a release. We don't actually
1523 * care about repeats, as those will be auto-generated within the IR
1524 * subsystem for repeating scancodes.
1525 */
1526 static int imon_parse_press_type(struct imon_context *ictx,
1527 unsigned char *buf, u8 ktype)
1528 {
1529 int press_type = 0;
1530 unsigned long flags;
1531
1532 spin_lock_irqsave(&ictx->kc_lock, flags);
1533
1534 /* key release of 0x02XXXXXX key */
1535 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1536 ictx->kc = ictx->last_keycode;
1537
1538 /* mouse button release on (some) 0xffdc devices */
1539 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1540 buf[2] == 0x81 && buf[3] == 0xb7)
1541 ictx->kc = ictx->last_keycode;
1542
1543 /* mouse button release on (some other) 0xffdc devices */
1544 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1545 buf[2] == 0x81 && buf[3] == 0xb7)
1546 ictx->kc = ictx->last_keycode;
1547
1548 /* mce-specific button handling, no keyup events */
1549 else if (ktype == IMON_KEY_MCE) {
1550 ictx->rc_toggle = buf[2];
1551 press_type = 1;
1552
1553 /* incoherent or irrelevant data */
1554 } else if (ictx->kc == KEY_RESERVED)
1555 press_type = -EINVAL;
1556
1557 /* key release of 0xXXXXXXb7 key */
1558 else if (ictx->release_code)
1559 press_type = 0;
1560
1561 /* this is a button press */
1562 else
1563 press_type = 1;
1564
1565 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1566
1567 return press_type;
1568 }
1569
1570 /*
1571 * Process the incoming packet
1572 */
1573 static void imon_incoming_packet(struct imon_context *ictx,
1574 struct urb *urb, int intf)
1575 {
1576 int len = urb->actual_length;
1577 unsigned char *buf = urb->transfer_buffer;
1578 struct device *dev = ictx->dev;
1579 unsigned long flags;
1580 u32 kc;
1581 u64 scancode;
1582 int press_type = 0;
1583 ktime_t t;
1584 static ktime_t prev_time;
1585 u8 ktype;
1586
1587 /* filter out junk data on the older 0xffdc imon devices */
1588 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1589 return;
1590
1591 /* Figure out what key was pressed */
1592 if (len == 8 && buf[7] == 0xee) {
1593 scancode = be64_to_cpu(*((__be64 *)buf));
1594 ktype = IMON_KEY_PANEL;
1595 kc = imon_panel_key_lookup(ictx, scancode);
1596 ictx->release_code = false;
1597 } else {
1598 scancode = be32_to_cpu(*((__be32 *)buf));
1599 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) {
1600 ktype = IMON_KEY_IMON;
1601 if (buf[0] == 0x80)
1602 ktype = IMON_KEY_MCE;
1603 kc = imon_mce_key_lookup(ictx, scancode);
1604 } else {
1605 ktype = IMON_KEY_IMON;
1606 kc = imon_remote_key_lookup(ictx, scancode);
1607 }
1608 }
1609
1610 spin_lock_irqsave(&ictx->kc_lock, flags);
1611 /* keyboard/mouse mode toggle button */
1612 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1613 ictx->last_keycode = kc;
1614 if (!nomouse) {
1615 ictx->pad_mouse = !ictx->pad_mouse;
1616 dev_dbg(dev, "toggling to %s mode\n",
1617 ictx->pad_mouse ? "mouse" : "keyboard");
1618 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1619 return;
1620 } else {
1621 ictx->pad_mouse = false;
1622 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1623 }
1624 }
1625
1626 ictx->kc = kc;
1627 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1628
1629 /* send touchscreen events through input subsystem if touchpad data */
1630 if (ictx->touch && len == 8 && buf[7] == 0x86) {
1631 imon_touch_event(ictx, buf);
1632 return;
1633
1634 /* look for mouse events with pad in mouse mode */
1635 } else if (ictx->pad_mouse) {
1636 if (imon_mouse_event(ictx, buf, len))
1637 return;
1638 }
1639
1640 /* Now for some special handling to convert pad input to arrow keys */
1641 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1642 ((len == 8) && (buf[0] & 0x40) &&
1643 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1644 len = 8;
1645 imon_pad_to_keys(ictx, buf);
1646 }
1647
1648 if (debug) {
1649 printk(KERN_INFO "intf%d decoded packet: %*ph\n",
1650 intf, len, buf);
1651 }
1652
1653 press_type = imon_parse_press_type(ictx, buf, ktype);
1654 if (press_type < 0)
1655 goto not_input_data;
1656
1657 if (ktype != IMON_KEY_PANEL) {
1658 if (press_type == 0)
1659 rc_keyup(ictx->rdev);
1660 else {
1661 enum rc_proto proto;
1662
1663 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
1664 proto = RC_PROTO_RC6_MCE;
1665 else if (ictx->rc_proto == RC_PROTO_BIT_IMON)
1666 proto = RC_PROTO_IMON;
1667 else
1668 return;
1669
1670 rc_keydown(ictx->rdev, proto, ictx->rc_scancode,
1671 ictx->rc_toggle);
1672
1673 spin_lock_irqsave(&ictx->kc_lock, flags);
1674 ictx->last_keycode = ictx->kc;
1675 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1676 }
1677 return;
1678 }
1679
1680 /* Only panel type events left to process now */
1681 spin_lock_irqsave(&ictx->kc_lock, flags);
1682
1683 t = ktime_get();
1684 /* KEY repeats from knob and panel that need to be suppressed */
1685 if (ictx->kc == KEY_MUTE ||
1686 ictx->dev_descr->flags & IMON_SUPPRESS_REPEATED_KEYS) {
1687 if (ictx->kc == ictx->last_keycode &&
1688 ktime_ms_delta(t, prev_time) < ictx->idev->rep[REP_DELAY]) {
1689 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1690 return;
1691 }
1692 }
1693
1694 prev_time = t;
1695 kc = ictx->kc;
1696
1697 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1698
1699 input_report_key(ictx->idev, kc, press_type);
1700 input_sync(ictx->idev);
1701
1702 /* panel keys don't generate a release */
1703 input_report_key(ictx->idev, kc, 0);
1704 input_sync(ictx->idev);
1705
1706 spin_lock_irqsave(&ictx->kc_lock, flags);
1707 ictx->last_keycode = kc;
1708 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1709
1710 return;
1711
1712 not_input_data:
1713 if (len != 8) {
1714 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n",
1715 __func__, len, intf);
1716 return;
1717 }
1718
1719 /* iMON 2.4G associate frame */
1720 if (buf[0] == 0x00 &&
1721 buf[2] == 0xFF && /* REFID */
1722 buf[3] == 0xFF &&
1723 buf[4] == 0xFF &&
1724 buf[5] == 0xFF && /* iMON 2.4G */
1725 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1726 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1727 dev_warn(dev, "%s: remote associated refid=%02X\n",
1728 __func__, buf[1]);
1729 ictx->rf_isassociating = false;
1730 }
1731 }
1732
1733 /*
1734 * Callback function for USB core API: receive data
1735 */
1736 static void usb_rx_callback_intf0(struct urb *urb)
1737 {
1738 struct imon_context *ictx;
1739 int intfnum = 0;
1740
1741 if (!urb)
1742 return;
1743
1744 ictx = (struct imon_context *)urb->context;
1745 if (!ictx)
1746 return;
1747
1748 /*
1749 * if we get a callback before we're done configuring the hardware, we
1750 * can't yet process the data, as there's nowhere to send it, but we
1751 * still need to submit a new rx URB to avoid wedging the hardware
1752 */
1753 if (!ictx->dev_present_intf0)
1754 goto out;
1755
1756 switch (urb->status) {
1757 case -ENOENT: /* usbcore unlink successful! */
1758 return;
1759
1760 case -ESHUTDOWN: /* transport endpoint was shut down */
1761 break;
1762
1763 case 0:
1764 imon_incoming_packet(ictx, urb, intfnum);
1765 break;
1766
1767 default:
1768 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1769 __func__, urb->status);
1770 break;
1771 }
1772
1773 out:
1774 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1775 }
1776
1777 static void usb_rx_callback_intf1(struct urb *urb)
1778 {
1779 struct imon_context *ictx;
1780 int intfnum = 1;
1781
1782 if (!urb)
1783 return;
1784
1785 ictx = (struct imon_context *)urb->context;
1786 if (!ictx)
1787 return;
1788
1789 /*
1790 * if we get a callback before we're done configuring the hardware, we
1791 * can't yet process the data, as there's nowhere to send it, but we
1792 * still need to submit a new rx URB to avoid wedging the hardware
1793 */
1794 if (!ictx->dev_present_intf1)
1795 goto out;
1796
1797 switch (urb->status) {
1798 case -ENOENT: /* usbcore unlink successful! */
1799 return;
1800
1801 case -ESHUTDOWN: /* transport endpoint was shut down */
1802 break;
1803
1804 case 0:
1805 imon_incoming_packet(ictx, urb, intfnum);
1806 break;
1807
1808 default:
1809 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1810 __func__, urb->status);
1811 break;
1812 }
1813
1814 out:
1815 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1816 }
1817
1818 /*
1819 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1820 * devices, and all of them constantly spew interrupts, even when there
1821 * is no actual data to report. However, byte 6 of this buffer looks like
1822 * its unique across device variants, so we're trying to key off that to
1823 * figure out which display type (if any) and what IR protocol the device
1824 * actually supports. These devices have their IR protocol hard-coded into
1825 * their firmware, they can't be changed on the fly like the newer hardware.
1826 */
1827 static void imon_get_ffdc_type(struct imon_context *ictx)
1828 {
1829 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1830 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1831 u64 allowed_protos = RC_PROTO_BIT_IMON;
1832
1833 switch (ffdc_cfg_byte) {
1834 /* iMON Knob, no display, iMON IR + vol knob */
1835 case 0x21:
1836 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1837 ictx->display_supported = false;
1838 break;
1839 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1840 case 0x4e:
1841 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1842 ictx->display_supported = false;
1843 ictx->rf_device = true;
1844 break;
1845 /* iMON VFD, no IR (does have vol knob tho) */
1846 case 0x35:
1847 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1848 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1849 break;
1850 /* iMON VFD, iMON IR */
1851 case 0x24:
1852 case 0x30:
1853 case 0x85:
1854 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1855 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1856 break;
1857 /* iMON VFD, MCE IR */
1858 case 0x46:
1859 case 0x9e:
1860 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1861 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1862 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1863 break;
1864 /* iMON VFD, iMON or MCE IR */
1865 case 0x7e:
1866 dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR");
1867 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1868 allowed_protos |= RC_PROTO_BIT_RC6_MCE;
1869 break;
1870 /* iMON LCD, MCE IR */
1871 case 0x9f:
1872 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1873 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1874 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1875 break;
1876 /* no display, iMON IR */
1877 case 0x26:
1878 dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR");
1879 ictx->display_supported = false;
1880 break;
1881 /* Soundgraph iMON UltraBay */
1882 case 0x98:
1883 dev_info(ictx->dev, "0xffdc iMON UltraBay, LCD + IR");
1884 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1885 allowed_protos = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE;
1886 ictx->dev_descr = &ultrabay_table;
1887 break;
1888
1889 default:
1890 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR");
1891 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1892 /*
1893 * We don't know which one it is, allow user to set the
1894 * RC6 one from userspace if IMON wasn't correct.
1895 */
1896 allowed_protos |= RC_PROTO_BIT_RC6_MCE;
1897 break;
1898 }
1899
1900 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1901
1902 ictx->display_type = detected_display_type;
1903 ictx->rc_proto = allowed_protos;
1904 }
1905
1906 static void imon_set_display_type(struct imon_context *ictx)
1907 {
1908 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1909
1910 /*
1911 * Try to auto-detect the type of display if the user hasn't set
1912 * it by hand via the display_type modparam. Default is VFD.
1913 */
1914
1915 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1916 switch (ictx->product) {
1917 case 0xffdc:
1918 /* set in imon_get_ffdc_type() */
1919 configured_display_type = ictx->display_type;
1920 break;
1921 case 0x0034:
1922 case 0x0035:
1923 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1924 break;
1925 case 0x0038:
1926 case 0x0039:
1927 case 0x0045:
1928 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1929 break;
1930 case 0x003c:
1931 case 0x0041:
1932 case 0x0042:
1933 case 0x0043:
1934 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1935 ictx->display_supported = false;
1936 break;
1937 case 0x0036:
1938 case 0x0044:
1939 default:
1940 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1941 break;
1942 }
1943 } else {
1944 configured_display_type = display_type;
1945 if (display_type == IMON_DISPLAY_TYPE_NONE)
1946 ictx->display_supported = false;
1947 else
1948 ictx->display_supported = true;
1949 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n",
1950 __func__, display_type);
1951 }
1952
1953 ictx->display_type = configured_display_type;
1954 }
1955
1956 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1957 {
1958 struct rc_dev *rdev;
1959 int ret;
1960 static const unsigned char fp_packet[] = {
1961 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 };
1962
1963 rdev = rc_allocate_device(RC_DRIVER_SCANCODE);
1964 if (!rdev) {
1965 dev_err(ictx->dev, "remote control dev allocation failed\n");
1966 goto out;
1967 }
1968
1969 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1970 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1971 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1972 sizeof(ictx->phys_rdev));
1973 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1974
1975 rdev->device_name = ictx->name_rdev;
1976 rdev->input_phys = ictx->phys_rdev;
1977 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
1978 rdev->dev.parent = ictx->dev;
1979
1980 rdev->priv = ictx;
1981 /* iMON PAD or MCE */
1982 rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE;
1983 rdev->change_protocol = imon_ir_change_protocol;
1984 rdev->driver_name = MOD_NAME;
1985
1986 /* Enable front-panel buttons and/or knobs */
1987 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1988 ret = send_packet(ictx);
1989 /* Not fatal, but warn about it */
1990 if (ret)
1991 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1992
1993 if (ictx->product == 0xffdc) {
1994 imon_get_ffdc_type(ictx);
1995 rdev->allowed_protocols = ictx->rc_proto;
1996 }
1997
1998 imon_set_display_type(ictx);
1999
2000 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
2001 rdev->map_name = RC_MAP_IMON_MCE;
2002 else
2003 rdev->map_name = RC_MAP_IMON_PAD;
2004
2005 ret = rc_register_device(rdev);
2006 if (ret < 0) {
2007 dev_err(ictx->dev, "remote input dev register failed\n");
2008 goto out;
2009 }
2010
2011 return rdev;
2012
2013 out:
2014 rc_free_device(rdev);
2015 return NULL;
2016 }
2017
2018 static struct input_dev *imon_init_idev(struct imon_context *ictx)
2019 {
2020 const struct imon_panel_key_table *key_table;
2021 struct input_dev *idev;
2022 int ret, i;
2023
2024 key_table = ictx->dev_descr->key_table;
2025
2026 idev = input_allocate_device();
2027 if (!idev)
2028 goto out;
2029
2030 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
2031 "iMON Panel, Knob and Mouse(%04x:%04x)",
2032 ictx->vendor, ictx->product);
2033 idev->name = ictx->name_idev;
2034
2035 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
2036 sizeof(ictx->phys_idev));
2037 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
2038 idev->phys = ictx->phys_idev;
2039
2040 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
2041
2042 idev->keybit[BIT_WORD(BTN_MOUSE)] =
2043 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2044 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
2045 BIT_MASK(REL_WHEEL);
2046
2047 /* panel and/or knob code support */
2048 for (i = 0; key_table[i].hw_code != 0; i++) {
2049 u32 kc = key_table[i].keycode;
2050 __set_bit(kc, idev->keybit);
2051 }
2052
2053 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
2054 idev->dev.parent = ictx->dev;
2055 input_set_drvdata(idev, ictx);
2056
2057 ret = input_register_device(idev);
2058 if (ret < 0) {
2059 dev_err(ictx->dev, "input dev register failed\n");
2060 goto out;
2061 }
2062
2063 return idev;
2064
2065 out:
2066 input_free_device(idev);
2067 return NULL;
2068 }
2069
2070 static struct input_dev *imon_init_touch(struct imon_context *ictx)
2071 {
2072 struct input_dev *touch;
2073 int ret;
2074
2075 touch = input_allocate_device();
2076 if (!touch)
2077 goto touch_alloc_failed;
2078
2079 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
2080 "iMON USB Touchscreen (%04x:%04x)",
2081 ictx->vendor, ictx->product);
2082 touch->name = ictx->name_touch;
2083
2084 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
2085 sizeof(ictx->phys_touch));
2086 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
2087 touch->phys = ictx->phys_touch;
2088
2089 touch->evbit[0] =
2090 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
2091 touch->keybit[BIT_WORD(BTN_TOUCH)] =
2092 BIT_MASK(BTN_TOUCH);
2093 input_set_abs_params(touch, ABS_X,
2094 0x00, 0xfff, 0, 0);
2095 input_set_abs_params(touch, ABS_Y,
2096 0x00, 0xfff, 0, 0);
2097
2098 input_set_drvdata(touch, ictx);
2099
2100 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
2101 touch->dev.parent = ictx->dev;
2102 ret = input_register_device(touch);
2103 if (ret < 0) {
2104 dev_info(ictx->dev, "touchscreen input dev register failed\n");
2105 goto touch_register_failed;
2106 }
2107
2108 return touch;
2109
2110 touch_register_failed:
2111 input_free_device(touch);
2112
2113 touch_alloc_failed:
2114 return NULL;
2115 }
2116
2117 static bool imon_find_endpoints(struct imon_context *ictx,
2118 struct usb_host_interface *iface_desc)
2119 {
2120 struct usb_endpoint_descriptor *ep;
2121 struct usb_endpoint_descriptor *rx_endpoint = NULL;
2122 struct usb_endpoint_descriptor *tx_endpoint = NULL;
2123 int ifnum = iface_desc->desc.bInterfaceNumber;
2124 int num_endpts = iface_desc->desc.bNumEndpoints;
2125 int i, ep_dir, ep_type;
2126 bool ir_ep_found = false;
2127 bool display_ep_found = false;
2128 bool tx_control = false;
2129
2130 /*
2131 * Scan the endpoint list and set:
2132 * first input endpoint = IR endpoint
2133 * first output endpoint = display endpoint
2134 */
2135 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2136 ep = &iface_desc->endpoint[i].desc;
2137 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2138 ep_type = usb_endpoint_type(ep);
2139
2140 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2141 ep_type == USB_ENDPOINT_XFER_INT) {
2142
2143 rx_endpoint = ep;
2144 ir_ep_found = true;
2145 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2146
2147 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2148 ep_type == USB_ENDPOINT_XFER_INT) {
2149 tx_endpoint = ep;
2150 display_ep_found = true;
2151 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2152 }
2153 }
2154
2155 if (ifnum == 0) {
2156 ictx->rx_endpoint_intf0 = rx_endpoint;
2157 /*
2158 * tx is used to send characters to lcd/vfd, associate RF
2159 * remotes, set IR protocol, and maybe more...
2160 */
2161 ictx->tx_endpoint = tx_endpoint;
2162 } else {
2163 ictx->rx_endpoint_intf1 = rx_endpoint;
2164 }
2165
2166 /*
2167 * If we didn't find a display endpoint, this is probably one of the
2168 * newer iMON devices that use control urb instead of interrupt
2169 */
2170 if (!display_ep_found) {
2171 tx_control = true;
2172 display_ep_found = true;
2173 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n",
2174 __func__);
2175 }
2176
2177 /*
2178 * Some iMON receivers have no display. Unfortunately, it seems
2179 * that SoundGraph recycles device IDs between devices both with
2180 * and without... :\
2181 */
2182 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2183 display_ep_found = false;
2184 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2185 }
2186
2187 /*
2188 * iMON Touch devices have a VGA touchscreen, but no "display", as
2189 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2190 */
2191 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2192 display_ep_found = false;
2193 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2194 }
2195
2196 /* Input endpoint is mandatory */
2197 if (!ir_ep_found)
2198 pr_err("no valid input (IR) endpoint found\n");
2199
2200 ictx->tx_control = tx_control;
2201
2202 if (display_ep_found)
2203 ictx->display_supported = true;
2204
2205 return ir_ep_found;
2206
2207 }
2208
2209 static struct imon_context *imon_init_intf0(struct usb_interface *intf,
2210 const struct usb_device_id *id)
2211 {
2212 struct imon_context *ictx;
2213 struct urb *rx_urb;
2214 struct urb *tx_urb;
2215 struct device *dev = &intf->dev;
2216 struct usb_host_interface *iface_desc;
2217 int ret = -ENOMEM;
2218
2219 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL);
2220 if (!ictx)
2221 goto exit;
2222
2223 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2224 if (!rx_urb)
2225 goto rx_urb_alloc_failed;
2226 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2227 if (!tx_urb)
2228 goto tx_urb_alloc_failed;
2229
2230 mutex_init(&ictx->lock);
2231 spin_lock_init(&ictx->kc_lock);
2232
2233 mutex_lock(&ictx->lock);
2234
2235 ictx->dev = dev;
2236 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2237 ictx->rx_urb_intf0 = rx_urb;
2238 ictx->tx_urb = tx_urb;
2239 ictx->rf_device = false;
2240
2241 init_completion(&ictx->tx.finished);
2242
2243 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2244 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2245
2246 /* save drive info for later accessing the panel/knob key table */
2247 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info;
2248 /* default send_packet delay is 5ms but some devices need more */
2249 ictx->send_packet_delay = ictx->dev_descr->flags &
2250 IMON_NEED_20MS_PKT_DELAY ? 20 : 5;
2251
2252 ret = -ENODEV;
2253 iface_desc = intf->cur_altsetting;
2254 if (!imon_find_endpoints(ictx, iface_desc)) {
2255 goto find_endpoint_failed;
2256 }
2257
2258 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2259 usb_rcvintpipe(ictx->usbdev_intf0,
2260 ictx->rx_endpoint_intf0->bEndpointAddress),
2261 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2262 usb_rx_callback_intf0, ictx,
2263 ictx->rx_endpoint_intf0->bInterval);
2264
2265 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2266 if (ret) {
2267 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2268 goto urb_submit_failed;
2269 }
2270
2271 ictx->idev = imon_init_idev(ictx);
2272 if (!ictx->idev) {
2273 dev_err(dev, "%s: input device setup failed\n", __func__);
2274 goto idev_setup_failed;
2275 }
2276
2277 ictx->rdev = imon_init_rdev(ictx);
2278 if (!ictx->rdev) {
2279 dev_err(dev, "%s: rc device setup failed\n", __func__);
2280 goto rdev_setup_failed;
2281 }
2282
2283 ictx->dev_present_intf0 = true;
2284
2285 mutex_unlock(&ictx->lock);
2286 return ictx;
2287
2288 rdev_setup_failed:
2289 input_unregister_device(ictx->idev);
2290 idev_setup_failed:
2291 usb_kill_urb(ictx->rx_urb_intf0);
2292 urb_submit_failed:
2293 find_endpoint_failed:
2294 usb_put_dev(ictx->usbdev_intf0);
2295 mutex_unlock(&ictx->lock);
2296 usb_free_urb(tx_urb);
2297 tx_urb_alloc_failed:
2298 usb_free_urb(rx_urb);
2299 rx_urb_alloc_failed:
2300 kfree(ictx);
2301 exit:
2302 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2303
2304 return NULL;
2305 }
2306
2307 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2308 struct imon_context *ictx)
2309 {
2310 struct urb *rx_urb;
2311 struct usb_host_interface *iface_desc;
2312 int ret = -ENOMEM;
2313
2314 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2315 if (!rx_urb)
2316 goto rx_urb_alloc_failed;
2317
2318 mutex_lock(&ictx->lock);
2319
2320 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2321 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0);
2322 }
2323
2324 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2325 ictx->rx_urb_intf1 = rx_urb;
2326
2327 ret = -ENODEV;
2328 iface_desc = intf->cur_altsetting;
2329 if (!imon_find_endpoints(ictx, iface_desc))
2330 goto find_endpoint_failed;
2331
2332 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2333 ictx->touch = imon_init_touch(ictx);
2334 if (!ictx->touch)
2335 goto touch_setup_failed;
2336 } else
2337 ictx->touch = NULL;
2338
2339 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2340 usb_rcvintpipe(ictx->usbdev_intf1,
2341 ictx->rx_endpoint_intf1->bEndpointAddress),
2342 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2343 usb_rx_callback_intf1, ictx,
2344 ictx->rx_endpoint_intf1->bInterval);
2345
2346 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2347
2348 if (ret) {
2349 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2350 goto urb_submit_failed;
2351 }
2352
2353 ictx->dev_present_intf1 = true;
2354
2355 mutex_unlock(&ictx->lock);
2356 return ictx;
2357
2358 urb_submit_failed:
2359 if (ictx->touch)
2360 input_unregister_device(ictx->touch);
2361 touch_setup_failed:
2362 find_endpoint_failed:
2363 usb_put_dev(ictx->usbdev_intf1);
2364 mutex_unlock(&ictx->lock);
2365 usb_free_urb(rx_urb);
2366 rx_urb_alloc_failed:
2367 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
2368
2369 return NULL;
2370 }
2371
2372 static void imon_init_display(struct imon_context *ictx,
2373 struct usb_interface *intf)
2374 {
2375 int ret;
2376
2377 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2378
2379 /* set up sysfs entry for built-in clock */
2380 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2381 if (ret)
2382 dev_err(ictx->dev, "Could not create display sysfs entries(%d)",
2383 ret);
2384
2385 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2386 ret = usb_register_dev(intf, &imon_lcd_class);
2387 else
2388 ret = usb_register_dev(intf, &imon_vfd_class);
2389 if (ret)
2390 /* Not a fatal error, so ignore */
2391 dev_info(ictx->dev, "could not get a minor number for display\n");
2392
2393 }
2394
2395 /*
2396 * Callback function for USB core API: Probe
2397 */
2398 static int imon_probe(struct usb_interface *interface,
2399 const struct usb_device_id *id)
2400 {
2401 struct usb_device *usbdev = NULL;
2402 struct usb_host_interface *iface_desc = NULL;
2403 struct usb_interface *first_if;
2404 struct device *dev = &interface->dev;
2405 int ifnum, sysfs_err;
2406 int ret = 0;
2407 struct imon_context *ictx = NULL;
2408 struct imon_context *first_if_ctx = NULL;
2409 u16 vendor, product;
2410
2411 usbdev = usb_get_dev(interface_to_usbdev(interface));
2412 iface_desc = interface->cur_altsetting;
2413 ifnum = iface_desc->desc.bInterfaceNumber;
2414 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2415 product = le16_to_cpu(usbdev->descriptor.idProduct);
2416
2417 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2418 __func__, vendor, product, ifnum);
2419
2420 /* prevent races probing devices w/multiple interfaces */
2421 mutex_lock(&driver_lock);
2422
2423 first_if = usb_ifnum_to_if(usbdev, 0);
2424 if (!first_if) {
2425 ret = -ENODEV;
2426 goto fail;
2427 }
2428
2429 first_if_ctx = usb_get_intfdata(first_if);
2430
2431 if (ifnum == 0) {
2432 ictx = imon_init_intf0(interface, id);
2433 if (!ictx) {
2434 pr_err("failed to initialize context!\n");
2435 ret = -ENODEV;
2436 goto fail;
2437 }
2438
2439 } else {
2440 /* this is the secondary interface on the device */
2441
2442 /* fail early if first intf failed to register */
2443 if (!first_if_ctx) {
2444 ret = -ENODEV;
2445 goto fail;
2446 }
2447
2448 ictx = imon_init_intf1(interface, first_if_ctx);
2449 if (!ictx) {
2450 pr_err("failed to attach to context!\n");
2451 ret = -ENODEV;
2452 goto fail;
2453 }
2454
2455 }
2456
2457 usb_set_intfdata(interface, ictx);
2458
2459 if (ifnum == 0) {
2460 mutex_lock(&ictx->lock);
2461
2462 if (product == 0xffdc && ictx->rf_device) {
2463 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2464 &imon_rf_attr_group);
2465 if (sysfs_err)
2466 pr_err("Could not create RF sysfs entries(%d)\n",
2467 sysfs_err);
2468 }
2469
2470 if (ictx->display_supported)
2471 imon_init_display(ictx, interface);
2472
2473 mutex_unlock(&ictx->lock);
2474 }
2475
2476 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n",
2477 vendor, product, ifnum,
2478 usbdev->bus->busnum, usbdev->devnum);
2479
2480 mutex_unlock(&driver_lock);
2481 usb_put_dev(usbdev);
2482
2483 return 0;
2484
2485 fail:
2486 mutex_unlock(&driver_lock);
2487 usb_put_dev(usbdev);
2488 dev_err(dev, "unable to register, err %d\n", ret);
2489
2490 return ret;
2491 }
2492
2493 /*
2494 * Callback function for USB core API: disconnect
2495 */
2496 static void imon_disconnect(struct usb_interface *interface)
2497 {
2498 struct imon_context *ictx;
2499 struct device *dev;
2500 int ifnum;
2501
2502 /* prevent races with multi-interface device probing and display_open */
2503 mutex_lock(&driver_lock);
2504
2505 ictx = usb_get_intfdata(interface);
2506 dev = ictx->dev;
2507 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2508
2509 /*
2510 * sysfs_remove_group is safe to call even if sysfs_create_group
2511 * hasn't been called
2512 */
2513 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2514 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2515
2516 usb_set_intfdata(interface, NULL);
2517
2518 /* Abort ongoing write */
2519 if (ictx->tx.busy) {
2520 usb_kill_urb(ictx->tx_urb);
2521 complete(&ictx->tx.finished);
2522 }
2523
2524 if (ifnum == 0) {
2525 ictx->dev_present_intf0 = false;
2526 usb_kill_urb(ictx->rx_urb_intf0);
2527 usb_put_dev(ictx->usbdev_intf0);
2528 input_unregister_device(ictx->idev);
2529 rc_unregister_device(ictx->rdev);
2530 if (ictx->display_supported) {
2531 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2532 usb_deregister_dev(interface, &imon_lcd_class);
2533 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
2534 usb_deregister_dev(interface, &imon_vfd_class);
2535 }
2536 } else {
2537 ictx->dev_present_intf1 = false;
2538 usb_kill_urb(ictx->rx_urb_intf1);
2539 usb_put_dev(ictx->usbdev_intf1);
2540 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2541 input_unregister_device(ictx->touch);
2542 del_timer_sync(&ictx->ttimer);
2543 }
2544 }
2545
2546 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1)
2547 free_imon_context(ictx);
2548
2549 mutex_unlock(&driver_lock);
2550
2551 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2552 __func__, ifnum);
2553 }
2554
2555 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2556 {
2557 struct imon_context *ictx = usb_get_intfdata(intf);
2558 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2559
2560 if (ifnum == 0)
2561 usb_kill_urb(ictx->rx_urb_intf0);
2562 else
2563 usb_kill_urb(ictx->rx_urb_intf1);
2564
2565 return 0;
2566 }
2567
2568 static int imon_resume(struct usb_interface *intf)
2569 {
2570 int rc = 0;
2571 struct imon_context *ictx = usb_get_intfdata(intf);
2572 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2573
2574 if (ifnum == 0) {
2575 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2576 usb_rcvintpipe(ictx->usbdev_intf0,
2577 ictx->rx_endpoint_intf0->bEndpointAddress),
2578 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2579 usb_rx_callback_intf0, ictx,
2580 ictx->rx_endpoint_intf0->bInterval);
2581
2582 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2583
2584 } else {
2585 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2586 usb_rcvintpipe(ictx->usbdev_intf1,
2587 ictx->rx_endpoint_intf1->bEndpointAddress),
2588 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2589 usb_rx_callback_intf1, ictx,
2590 ictx->rx_endpoint_intf1->bInterval);
2591
2592 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2593 }
2594
2595 return rc;
2596 }
2597
2598 module_usb_driver(imon_driver);
Linux with added FPC-III support