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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/module.h>
31 #include <linux/slab.h>
32 #include <linux/uaccess.h>
33 #include <linux/ratelimit.h>
34
35 #include <linux/input.h>
36 #include <linux/usb.h>
37 #include <linux/usb/input.h>
38 #include <media/rc-core.h>
39
40 #include <linux/time.h>
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 #define IMON_IR_RAW 2
96 struct imon_panel_key_table key_table[];
97 };
98
99 struct imon_context {
100 struct device *dev;
101 /* Newer devices have two interfaces */
102 struct usb_device *usbdev_intf0;
103 struct usb_device *usbdev_intf1;
104
105 bool display_supported; /* not all controllers do */
106 bool display_isopen; /* display port has been opened */
107 bool rf_device; /* true if iMON 2.4G LT/DT RF device */
108 bool rf_isassociating; /* RF remote associating */
109 bool dev_present_intf0; /* USB device presence, interface 0 */
110 bool dev_present_intf1; /* USB device presence, interface 1 */
111
112 struct mutex lock; /* to lock this object */
113 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
114
115 struct usb_endpoint_descriptor *rx_endpoint_intf0;
116 struct usb_endpoint_descriptor *rx_endpoint_intf1;
117 struct usb_endpoint_descriptor *tx_endpoint;
118 struct urb *rx_urb_intf0;
119 struct urb *rx_urb_intf1;
120 struct urb *tx_urb;
121 bool tx_control;
122 unsigned char usb_rx_buf[8];
123 unsigned char usb_tx_buf[8];
124 unsigned int send_packet_delay;
125
126 struct rx_data {
127 int count; /* length of 0 or 1 sequence */
128 int prev_bit; /* logic level of sequence */
129 int initial_space; /* initial space flag */
130 } rx;
131
132 struct tx_t {
133 unsigned char data_buf[35]; /* user data buffer */
134 struct completion finished; /* wait for write to finish */
135 bool busy; /* write in progress */
136 int status; /* status of tx completion */
137 } tx;
138
139 u16 vendor; /* usb vendor ID */
140 u16 product; /* usb product ID */
141
142 struct rc_dev *rdev; /* rc-core device for remote */
143 struct input_dev *idev; /* input device for panel & IR mouse */
144 struct input_dev *touch; /* input device for touchscreen */
145
146 spinlock_t kc_lock; /* make sure we get keycodes right */
147 u32 kc; /* current input keycode */
148 u32 last_keycode; /* last reported input keycode */
149 u32 rc_scancode; /* the computed remote scancode */
150 u8 rc_toggle; /* the computed remote toggle bit */
151 u64 rc_proto; /* iMON or MCE (RC6) IR protocol? */
152 bool release_code; /* some keys send a release code */
153
154 u8 display_type; /* store the display type */
155 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
156
157 char name_rdev[128]; /* rc input device name */
158 char phys_rdev[64]; /* rc input device phys path */
159
160 char name_idev[128]; /* input device name */
161 char phys_idev[64]; /* input device phys path */
162
163 char name_touch[128]; /* touch screen name */
164 char phys_touch[64]; /* touch screen phys path */
165 struct timer_list ttimer; /* touch screen timer */
166 int touch_x; /* x coordinate on touchscreen */
167 int touch_y; /* y coordinate on touchscreen */
168 struct imon_usb_dev_descr *dev_descr; /* device description with key
169 table for front panels */
170 };
171
172 #define TOUCH_TIMEOUT (HZ/30)
173
174 /* vfd character device file operations */
175 static const struct file_operations vfd_fops = {
176 .owner = THIS_MODULE,
177 .open = &display_open,
178 .write = &vfd_write,
179 .release = &display_close,
180 .llseek = noop_llseek,
181 };
182
183 /* lcd character device file operations */
184 static const struct file_operations lcd_fops = {
185 .owner = THIS_MODULE,
186 .open = &display_open,
187 .write = &lcd_write,
188 .release = &display_close,
189 .llseek = noop_llseek,
190 };
191
192 enum {
193 IMON_DISPLAY_TYPE_AUTO = 0,
194 IMON_DISPLAY_TYPE_VFD = 1,
195 IMON_DISPLAY_TYPE_LCD = 2,
196 IMON_DISPLAY_TYPE_VGA = 3,
197 IMON_DISPLAY_TYPE_NONE = 4,
198 };
199
200 enum {
201 IMON_KEY_IMON = 0,
202 IMON_KEY_MCE = 1,
203 IMON_KEY_PANEL = 2,
204 };
205
206 static struct usb_class_driver imon_vfd_class = {
207 .name = DEVICE_NAME,
208 .fops = &vfd_fops,
209 .minor_base = DISPLAY_MINOR_BASE,
210 };
211
212 static struct usb_class_driver imon_lcd_class = {
213 .name = DEVICE_NAME,
214 .fops = &lcd_fops,
215 .minor_base = DISPLAY_MINOR_BASE,
216 };
217
218 /* imon receiver front panel/knob key table */
219 static const struct imon_usb_dev_descr imon_default_table = {
220 .flags = IMON_NO_FLAGS,
221 .key_table = {
222 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
223 { 0x000000001200ffeell, KEY_UP },
224 { 0x000000001300ffeell, KEY_DOWN },
225 { 0x000000001400ffeell, KEY_LEFT },
226 { 0x000000001500ffeell, KEY_RIGHT },
227 { 0x000000001600ffeell, KEY_ENTER },
228 { 0x000000001700ffeell, KEY_ESC },
229 { 0x000000001f00ffeell, KEY_AUDIO },
230 { 0x000000002000ffeell, KEY_VIDEO },
231 { 0x000000002100ffeell, KEY_CAMERA },
232 { 0x000000002700ffeell, KEY_DVD },
233 { 0x000000002300ffeell, KEY_TV },
234 { 0x000000002b00ffeell, KEY_EXIT },
235 { 0x000000002c00ffeell, KEY_SELECT },
236 { 0x000000002d00ffeell, KEY_MENU },
237 { 0x000000000500ffeell, KEY_PREVIOUS },
238 { 0x000000000700ffeell, KEY_REWIND },
239 { 0x000000000400ffeell, KEY_STOP },
240 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
241 { 0x000000000800ffeell, KEY_FASTFORWARD },
242 { 0x000000000600ffeell, KEY_NEXT },
243 { 0x000000010000ffeell, KEY_RIGHT },
244 { 0x000001000000ffeell, KEY_LEFT },
245 { 0x000000003d00ffeell, KEY_SELECT },
246 { 0x000100000000ffeell, KEY_VOLUMEUP },
247 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
248 { 0x000000000100ffeell, KEY_MUTE },
249 /* 0xffdc iMON MCE VFD */
250 { 0x00010000ffffffeell, KEY_VOLUMEUP },
251 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
252 { 0x00000001ffffffeell, KEY_MUTE },
253 { 0x0000000fffffffeell, KEY_MEDIA },
254 { 0x00000012ffffffeell, KEY_UP },
255 { 0x00000013ffffffeell, KEY_DOWN },
256 { 0x00000014ffffffeell, KEY_LEFT },
257 { 0x00000015ffffffeell, KEY_RIGHT },
258 { 0x00000016ffffffeell, KEY_ENTER },
259 { 0x00000017ffffffeell, KEY_ESC },
260 /* iMON Knob values */
261 { 0x000100ffffffffeell, KEY_VOLUMEUP },
262 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
263 { 0x000008ffffffffeell, KEY_MUTE },
264 { 0, KEY_RESERVED },
265 }
266 };
267
268 static const struct imon_usb_dev_descr imon_OEM_VFD = {
269 .flags = IMON_NEED_20MS_PKT_DELAY,
270 .key_table = {
271 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
272 { 0x000000001200ffeell, KEY_UP },
273 { 0x000000001300ffeell, KEY_DOWN },
274 { 0x000000001400ffeell, KEY_LEFT },
275 { 0x000000001500ffeell, KEY_RIGHT },
276 { 0x000000001600ffeell, KEY_ENTER },
277 { 0x000000001700ffeell, KEY_ESC },
278 { 0x000000001f00ffeell, KEY_AUDIO },
279 { 0x000000002b00ffeell, KEY_EXIT },
280 { 0x000000002c00ffeell, KEY_SELECT },
281 { 0x000000002d00ffeell, KEY_MENU },
282 { 0x000000000500ffeell, KEY_PREVIOUS },
283 { 0x000000000700ffeell, KEY_REWIND },
284 { 0x000000000400ffeell, KEY_STOP },
285 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
286 { 0x000000000800ffeell, KEY_FASTFORWARD },
287 { 0x000000000600ffeell, KEY_NEXT },
288 { 0x000000010000ffeell, KEY_RIGHT },
289 { 0x000001000000ffeell, KEY_LEFT },
290 { 0x000000003d00ffeell, KEY_SELECT },
291 { 0x000100000000ffeell, KEY_VOLUMEUP },
292 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
293 { 0x000000000100ffeell, KEY_MUTE },
294 /* 0xffdc iMON MCE VFD */
295 { 0x00010000ffffffeell, KEY_VOLUMEUP },
296 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
297 { 0x00000001ffffffeell, KEY_MUTE },
298 { 0x0000000fffffffeell, KEY_MEDIA },
299 { 0x00000012ffffffeell, KEY_UP },
300 { 0x00000013ffffffeell, KEY_DOWN },
301 { 0x00000014ffffffeell, KEY_LEFT },
302 { 0x00000015ffffffeell, KEY_RIGHT },
303 { 0x00000016ffffffeell, KEY_ENTER },
304 { 0x00000017ffffffeell, KEY_ESC },
305 /* iMON Knob values */
306 { 0x000100ffffffffeell, KEY_VOLUMEUP },
307 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
308 { 0x000008ffffffffeell, KEY_MUTE },
309 { 0, KEY_RESERVED },
310 }
311 };
312
313 /* imon receiver front panel/knob key table for DH102*/
314 static const struct imon_usb_dev_descr imon_DH102 = {
315 .flags = IMON_NO_FLAGS,
316 .key_table = {
317 { 0x000100000000ffeell, KEY_VOLUMEUP },
318 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
319 { 0x000000010000ffeell, KEY_MUTE },
320 { 0x0000000f0000ffeell, KEY_MEDIA },
321 { 0x000000120000ffeell, KEY_UP },
322 { 0x000000130000ffeell, KEY_DOWN },
323 { 0x000000140000ffeell, KEY_LEFT },
324 { 0x000000150000ffeell, KEY_RIGHT },
325 { 0x000000160000ffeell, KEY_ENTER },
326 { 0x000000170000ffeell, KEY_ESC },
327 { 0x0000002b0000ffeell, KEY_EXIT },
328 { 0x0000002c0000ffeell, KEY_SELECT },
329 { 0x0000002d0000ffeell, KEY_MENU },
330 { 0, KEY_RESERVED }
331 }
332 };
333
334 static const struct imon_usb_dev_descr imon_ir_raw = {
335 .flags = IMON_IR_RAW,
336 };
337
338 /*
339 * USB Device ID for iMON USB Control Boards
340 *
341 * The Windows drivers contain 6 different inf files, more or less one for
342 * each new device until the 0x0034-0x0046 devices, which all use the same
343 * driver. Some of the devices in the 34-46 range haven't been definitively
344 * identified yet. Early devices have either a TriGem Computer, Inc. or a
345 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
346 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
347 * the ffdc and later devices, which do onboard decoding.
348 */
349 static const struct usb_device_id imon_usb_id_table[] = {
350 /*
351 * Several devices with this same device ID, all use iMON_PAD.inf
352 * SoundGraph iMON PAD (IR & VFD)
353 * SoundGraph iMON PAD (IR & LCD)
354 * SoundGraph iMON Knob (IR only)
355 */
356 { USB_DEVICE(0x15c2, 0xffdc),
357 .driver_info = (unsigned long)&imon_default_table },
358
359 /*
360 * Newer devices, all driven by the latest iMON Windows driver, full
361 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
362 * Need user input to fill in details on unknown devices.
363 */
364 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
365 { USB_DEVICE(0x15c2, 0x0034),
366 .driver_info = (unsigned long)&imon_DH102 },
367 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
368 { USB_DEVICE(0x15c2, 0x0035),
369 .driver_info = (unsigned long)&imon_default_table},
370 /* SoundGraph iMON OEM VFD (IR & VFD) */
371 { USB_DEVICE(0x15c2, 0x0036),
372 .driver_info = (unsigned long)&imon_OEM_VFD },
373 /* device specifics unknown */
374 { USB_DEVICE(0x15c2, 0x0037),
375 .driver_info = (unsigned long)&imon_default_table},
376 /* SoundGraph iMON OEM LCD (IR & LCD) */
377 { USB_DEVICE(0x15c2, 0x0038),
378 .driver_info = (unsigned long)&imon_default_table},
379 /* SoundGraph iMON UltraBay (IR & LCD) */
380 { USB_DEVICE(0x15c2, 0x0039),
381 .driver_info = (unsigned long)&imon_default_table},
382 /* device specifics unknown */
383 { USB_DEVICE(0x15c2, 0x003a),
384 .driver_info = (unsigned long)&imon_default_table},
385 /* device specifics unknown */
386 { USB_DEVICE(0x15c2, 0x003b),
387 .driver_info = (unsigned long)&imon_default_table},
388 /* SoundGraph iMON OEM Inside (IR only) */
389 { USB_DEVICE(0x15c2, 0x003c),
390 .driver_info = (unsigned long)&imon_default_table},
391 /* device specifics unknown */
392 { USB_DEVICE(0x15c2, 0x003d),
393 .driver_info = (unsigned long)&imon_default_table},
394 /* device specifics unknown */
395 { USB_DEVICE(0x15c2, 0x003e),
396 .driver_info = (unsigned long)&imon_default_table},
397 /* device specifics unknown */
398 { USB_DEVICE(0x15c2, 0x003f),
399 .driver_info = (unsigned long)&imon_default_table},
400 /* device specifics unknown */
401 { USB_DEVICE(0x15c2, 0x0040),
402 .driver_info = (unsigned long)&imon_default_table},
403 /* SoundGraph iMON MINI (IR only) */
404 { USB_DEVICE(0x15c2, 0x0041),
405 .driver_info = (unsigned long)&imon_default_table},
406 /* Antec Veris Multimedia Station EZ External (IR only) */
407 { USB_DEVICE(0x15c2, 0x0042),
408 .driver_info = (unsigned long)&imon_default_table},
409 /* Antec Veris Multimedia Station Basic Internal (IR only) */
410 { USB_DEVICE(0x15c2, 0x0043),
411 .driver_info = (unsigned long)&imon_default_table},
412 /* Antec Veris Multimedia Station Elite (IR & VFD) */
413 { USB_DEVICE(0x15c2, 0x0044),
414 .driver_info = (unsigned long)&imon_default_table},
415 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
416 { USB_DEVICE(0x15c2, 0x0045),
417 .driver_info = (unsigned long)&imon_default_table},
418 /* device specifics unknown */
419 { USB_DEVICE(0x15c2, 0x0046),
420 .driver_info = (unsigned long)&imon_default_table},
421 /* TriGem iMON (IR only) -- TG_iMON.inf */
422 { USB_DEVICE(0x0aa8, 0x8001),
423 .driver_info = (unsigned long)&imon_ir_raw},
424 /* SoundGraph iMON (IR only) -- sg_imon.inf */
425 { USB_DEVICE(0x04e8, 0xff30),
426 .driver_info = (unsigned long)&imon_ir_raw},
427 /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
428 { USB_DEVICE(0x0aa8, 0xffda),
429 .driver_info = (unsigned long)&imon_ir_raw},
430 /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
431 { USB_DEVICE(0x15c2, 0xffda),
432 .driver_info = (unsigned long)&imon_ir_raw},
433 {}
434 };
435
436 /* USB Device data */
437 static struct usb_driver imon_driver = {
438 .name = MOD_NAME,
439 .probe = imon_probe,
440 .disconnect = imon_disconnect,
441 .suspend = imon_suspend,
442 .resume = imon_resume,
443 .id_table = imon_usb_id_table,
444 };
445
446 /* to prevent races between open() and disconnect(), probing, etc */
447 static DEFINE_MUTEX(driver_lock);
448
449 /* Module bookkeeping bits */
450 MODULE_AUTHOR(MOD_AUTHOR);
451 MODULE_DESCRIPTION(MOD_DESC);
452 MODULE_VERSION(MOD_VERSION);
453 MODULE_LICENSE("GPL");
454 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
455
456 static bool debug;
457 module_param(debug, bool, S_IRUGO | S_IWUSR);
458 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
459
460 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
461 static int display_type;
462 module_param(display_type, int, S_IRUGO);
463 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
464
465 static int pad_stabilize = 1;
466 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
467 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD presses in arrow key mode. 0=disable, 1=enable (default).");
468
469 /*
470 * In certain use cases, mouse mode isn't really helpful, and could actually
471 * cause confusion, so allow disabling it when the IR device is open.
472 */
473 static bool nomouse;
474 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
475 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is open. 0=don't disable, 1=disable. (default: don't disable)");
476
477 /* threshold at which a pad push registers as an arrow key in kbd mode */
478 static int pad_thresh;
479 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
480 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)");
481
482
483 static void free_imon_context(struct imon_context *ictx)
484 {
485 struct device *dev = ictx->dev;
486
487 usb_free_urb(ictx->tx_urb);
488 usb_free_urb(ictx->rx_urb_intf0);
489 usb_free_urb(ictx->rx_urb_intf1);
490 kfree(ictx);
491
492 dev_dbg(dev, "%s: iMON context freed\n", __func__);
493 }
494
495 /**
496 * Called when the Display device (e.g. /dev/lcd0)
497 * is opened by the application.
498 */
499 static int display_open(struct inode *inode, struct file *file)
500 {
501 struct usb_interface *interface;
502 struct imon_context *ictx = NULL;
503 int subminor;
504 int retval = 0;
505
506 /* prevent races with disconnect */
507 mutex_lock(&driver_lock);
508
509 subminor = iminor(inode);
510 interface = usb_find_interface(&imon_driver, subminor);
511 if (!interface) {
512 pr_err("could not find interface for minor %d\n", subminor);
513 retval = -ENODEV;
514 goto exit;
515 }
516 ictx = usb_get_intfdata(interface);
517
518 if (!ictx) {
519 pr_err("no context found for minor %d\n", subminor);
520 retval = -ENODEV;
521 goto exit;
522 }
523
524 mutex_lock(&ictx->lock);
525
526 if (!ictx->display_supported) {
527 pr_err("display not supported by device\n");
528 retval = -ENODEV;
529 } else if (ictx->display_isopen) {
530 pr_err("display port is already open\n");
531 retval = -EBUSY;
532 } else {
533 ictx->display_isopen = true;
534 file->private_data = ictx;
535 dev_dbg(ictx->dev, "display port opened\n");
536 }
537
538 mutex_unlock(&ictx->lock);
539
540 exit:
541 mutex_unlock(&driver_lock);
542 return retval;
543 }
544
545 /**
546 * Called when the display device (e.g. /dev/lcd0)
547 * is closed by the application.
548 */
549 static int display_close(struct inode *inode, struct file *file)
550 {
551 struct imon_context *ictx = NULL;
552 int retval = 0;
553
554 ictx = file->private_data;
555
556 if (!ictx) {
557 pr_err("no context for device\n");
558 return -ENODEV;
559 }
560
561 mutex_lock(&ictx->lock);
562
563 if (!ictx->display_supported) {
564 pr_err("display not supported by device\n");
565 retval = -ENODEV;
566 } else if (!ictx->display_isopen) {
567 pr_err("display is not open\n");
568 retval = -EIO;
569 } else {
570 ictx->display_isopen = false;
571 dev_dbg(ictx->dev, "display port closed\n");
572 }
573
574 mutex_unlock(&ictx->lock);
575 return retval;
576 }
577
578 /**
579 * Sends a packet to the device -- this function must be called with
580 * ictx->lock held, or its unlock/lock sequence while waiting for tx
581 * to complete can/will lead to a deadlock.
582 */
583 static int send_packet(struct imon_context *ictx)
584 {
585 unsigned int pipe;
586 unsigned long timeout;
587 int interval = 0;
588 int retval = 0;
589 struct usb_ctrlrequest *control_req = NULL;
590
591 /* Check if we need to use control or interrupt urb */
592 if (!ictx->tx_control) {
593 pipe = usb_sndintpipe(ictx->usbdev_intf0,
594 ictx->tx_endpoint->bEndpointAddress);
595 interval = ictx->tx_endpoint->bInterval;
596
597 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
598 ictx->usb_tx_buf,
599 sizeof(ictx->usb_tx_buf),
600 usb_tx_callback, ictx, interval);
601
602 ictx->tx_urb->actual_length = 0;
603 } else {
604 /* fill request into kmalloc'ed space: */
605 control_req = kmalloc(sizeof(*control_req), GFP_KERNEL);
606 if (control_req == NULL)
607 return -ENOMEM;
608
609 /* setup packet is '21 09 0200 0001 0008' */
610 control_req->bRequestType = 0x21;
611 control_req->bRequest = 0x09;
612 control_req->wValue = cpu_to_le16(0x0200);
613 control_req->wIndex = cpu_to_le16(0x0001);
614 control_req->wLength = cpu_to_le16(0x0008);
615
616 /* control pipe is endpoint 0x00 */
617 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
618
619 /* build the control urb */
620 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
621 pipe, (unsigned char *)control_req,
622 ictx->usb_tx_buf,
623 sizeof(ictx->usb_tx_buf),
624 usb_tx_callback, ictx);
625 ictx->tx_urb->actual_length = 0;
626 }
627
628 reinit_completion(&ictx->tx.finished);
629 ictx->tx.busy = true;
630 smp_rmb(); /* ensure later readers know we're busy */
631
632 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
633 if (retval) {
634 ictx->tx.busy = false;
635 smp_rmb(); /* ensure later readers know we're not busy */
636 pr_err_ratelimited("error submitting urb(%d)\n", retval);
637 } else {
638 /* Wait for transmission to complete (or abort) */
639 mutex_unlock(&ictx->lock);
640 retval = wait_for_completion_interruptible(
641 &ictx->tx.finished);
642 if (retval) {
643 usb_kill_urb(ictx->tx_urb);
644 pr_err_ratelimited("task interrupted\n");
645 }
646 mutex_lock(&ictx->lock);
647
648 retval = ictx->tx.status;
649 if (retval)
650 pr_err_ratelimited("packet tx failed (%d)\n", retval);
651 }
652
653 kfree(control_req);
654
655 /*
656 * Induce a mandatory delay before returning, as otherwise,
657 * send_packet can get called so rapidly as to overwhelm the device,
658 * particularly on faster systems and/or those with quirky usb.
659 */
660 timeout = msecs_to_jiffies(ictx->send_packet_delay);
661 set_current_state(TASK_INTERRUPTIBLE);
662 schedule_timeout(timeout);
663
664 return retval;
665 }
666
667 /**
668 * Sends an associate packet to the iMON 2.4G.
669 *
670 * This might not be such a good idea, since it has an id collision with
671 * some versions of the "IR & VFD" combo. The only way to determine if it
672 * is an RF version is to look at the product description string. (Which
673 * we currently do not fetch).
674 */
675 static int send_associate_24g(struct imon_context *ictx)
676 {
677 int retval;
678 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
679 0x00, 0x00, 0x00, 0x20 };
680
681 if (!ictx) {
682 pr_err("no context for device\n");
683 return -ENODEV;
684 }
685
686 if (!ictx->dev_present_intf0) {
687 pr_err("no iMON device present\n");
688 return -ENODEV;
689 }
690
691 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
692 retval = send_packet(ictx);
693
694 return retval;
695 }
696
697 /**
698 * Sends packets to setup and show clock on iMON display
699 *
700 * Arguments: year - last 2 digits of year, month - 1..12,
701 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
702 * hour - 0..23, minute - 0..59, second - 0..59
703 */
704 static int send_set_imon_clock(struct imon_context *ictx,
705 unsigned int year, unsigned int month,
706 unsigned int day, unsigned int dow,
707 unsigned int hour, unsigned int minute,
708 unsigned int second)
709 {
710 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
711 int retval = 0;
712 int i;
713
714 if (!ictx) {
715 pr_err("no context for device\n");
716 return -ENODEV;
717 }
718
719 switch (ictx->display_type) {
720 case IMON_DISPLAY_TYPE_LCD:
721 clock_enable_pkt[0][0] = 0x80;
722 clock_enable_pkt[0][1] = year;
723 clock_enable_pkt[0][2] = month-1;
724 clock_enable_pkt[0][3] = day;
725 clock_enable_pkt[0][4] = hour;
726 clock_enable_pkt[0][5] = minute;
727 clock_enable_pkt[0][6] = second;
728
729 clock_enable_pkt[1][0] = 0x80;
730 clock_enable_pkt[1][1] = 0;
731 clock_enable_pkt[1][2] = 0;
732 clock_enable_pkt[1][3] = 0;
733 clock_enable_pkt[1][4] = 0;
734 clock_enable_pkt[1][5] = 0;
735 clock_enable_pkt[1][6] = 0;
736
737 if (ictx->product == 0xffdc) {
738 clock_enable_pkt[0][7] = 0x50;
739 clock_enable_pkt[1][7] = 0x51;
740 } else {
741 clock_enable_pkt[0][7] = 0x88;
742 clock_enable_pkt[1][7] = 0x8a;
743 }
744
745 break;
746
747 case IMON_DISPLAY_TYPE_VFD:
748 clock_enable_pkt[0][0] = year;
749 clock_enable_pkt[0][1] = month-1;
750 clock_enable_pkt[0][2] = day;
751 clock_enable_pkt[0][3] = dow;
752 clock_enable_pkt[0][4] = hour;
753 clock_enable_pkt[0][5] = minute;
754 clock_enable_pkt[0][6] = second;
755 clock_enable_pkt[0][7] = 0x40;
756
757 clock_enable_pkt[1][0] = 0;
758 clock_enable_pkt[1][1] = 0;
759 clock_enable_pkt[1][2] = 1;
760 clock_enable_pkt[1][3] = 0;
761 clock_enable_pkt[1][4] = 0;
762 clock_enable_pkt[1][5] = 0;
763 clock_enable_pkt[1][6] = 0;
764 clock_enable_pkt[1][7] = 0x42;
765
766 break;
767
768 default:
769 return -ENODEV;
770 }
771
772 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
773 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
774 retval = send_packet(ictx);
775 if (retval) {
776 pr_err("send_packet failed for packet %d\n", i);
777 break;
778 }
779 }
780
781 return retval;
782 }
783
784 /**
785 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
786 */
787 static ssize_t show_associate_remote(struct device *d,
788 struct device_attribute *attr,
789 char *buf)
790 {
791 struct imon_context *ictx = dev_get_drvdata(d);
792
793 if (!ictx)
794 return -ENODEV;
795
796 mutex_lock(&ictx->lock);
797 if (ictx->rf_isassociating)
798 strcpy(buf, "associating\n");
799 else
800 strcpy(buf, "closed\n");
801
802 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");
803 mutex_unlock(&ictx->lock);
804 return strlen(buf);
805 }
806
807 static ssize_t store_associate_remote(struct device *d,
808 struct device_attribute *attr,
809 const char *buf, size_t count)
810 {
811 struct imon_context *ictx;
812
813 ictx = dev_get_drvdata(d);
814
815 if (!ictx)
816 return -ENODEV;
817
818 mutex_lock(&ictx->lock);
819 ictx->rf_isassociating = true;
820 send_associate_24g(ictx);
821 mutex_unlock(&ictx->lock);
822
823 return count;
824 }
825
826 /**
827 * sysfs functions to control internal imon clock
828 */
829 static ssize_t show_imon_clock(struct device *d,
830 struct device_attribute *attr, char *buf)
831 {
832 struct imon_context *ictx = dev_get_drvdata(d);
833 size_t len;
834
835 if (!ictx)
836 return -ENODEV;
837
838 mutex_lock(&ictx->lock);
839
840 if (!ictx->display_supported) {
841 len = snprintf(buf, PAGE_SIZE, "Not supported.");
842 } else {
843 len = snprintf(buf, PAGE_SIZE,
844 "To set the clock on your iMON display:\n"
845 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
846 "%s", ictx->display_isopen ?
847 "\nNOTE: imon device must be closed\n" : "");
848 }
849
850 mutex_unlock(&ictx->lock);
851
852 return len;
853 }
854
855 static ssize_t store_imon_clock(struct device *d,
856 struct device_attribute *attr,
857 const char *buf, size_t count)
858 {
859 struct imon_context *ictx = dev_get_drvdata(d);
860 ssize_t retval;
861 unsigned int year, month, day, dow, hour, minute, second;
862
863 if (!ictx)
864 return -ENODEV;
865
866 mutex_lock(&ictx->lock);
867
868 if (!ictx->display_supported) {
869 retval = -ENODEV;
870 goto exit;
871 } else if (ictx->display_isopen) {
872 retval = -EBUSY;
873 goto exit;
874 }
875
876 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
877 &hour, &minute, &second) != 7) {
878 retval = -EINVAL;
879 goto exit;
880 }
881
882 if ((month < 1 || month > 12) ||
883 (day < 1 || day > 31) || (dow > 6) ||
884 (hour > 23) || (minute > 59) || (second > 59)) {
885 retval = -EINVAL;
886 goto exit;
887 }
888
889 retval = send_set_imon_clock(ictx, year, month, day, dow,
890 hour, minute, second);
891 if (retval)
892 goto exit;
893
894 retval = count;
895 exit:
896 mutex_unlock(&ictx->lock);
897
898 return retval;
899 }
900
901
902 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
903 store_imon_clock);
904
905 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
906 store_associate_remote);
907
908 static struct attribute *imon_display_sysfs_entries[] = {
909 &dev_attr_imon_clock.attr,
910 NULL
911 };
912
913 static const struct attribute_group imon_display_attr_group = {
914 .attrs = imon_display_sysfs_entries
915 };
916
917 static struct attribute *imon_rf_sysfs_entries[] = {
918 &dev_attr_associate_remote.attr,
919 NULL
920 };
921
922 static const struct attribute_group imon_rf_attr_group = {
923 .attrs = imon_rf_sysfs_entries
924 };
925
926 /**
927 * Writes data to the VFD. The iMON VFD is 2x16 characters
928 * and requires data in 5 consecutive USB interrupt packets,
929 * each packet but the last carrying 7 bytes.
930 *
931 * I don't know if the VFD board supports features such as
932 * scrolling, clearing rows, blanking, etc. so at
933 * the caller must provide a full screen of data. If fewer
934 * than 32 bytes are provided spaces will be appended to
935 * generate a full screen.
936 */
937 static ssize_t vfd_write(struct file *file, const char __user *buf,
938 size_t n_bytes, loff_t *pos)
939 {
940 int i;
941 int offset;
942 int seq;
943 int retval = 0;
944 struct imon_context *ictx;
945 static const unsigned char vfd_packet6[] = {
946 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
947
948 ictx = file->private_data;
949 if (!ictx) {
950 pr_err_ratelimited("no context for device\n");
951 return -ENODEV;
952 }
953
954 mutex_lock(&ictx->lock);
955
956 if (!ictx->dev_present_intf0) {
957 pr_err_ratelimited("no iMON device present\n");
958 retval = -ENODEV;
959 goto exit;
960 }
961
962 if (n_bytes <= 0 || n_bytes > 32) {
963 pr_err_ratelimited("invalid payload size\n");
964 retval = -EINVAL;
965 goto exit;
966 }
967
968 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
969 retval = -EFAULT;
970 goto exit;
971 }
972
973 /* Pad with spaces */
974 for (i = n_bytes; i < 32; ++i)
975 ictx->tx.data_buf[i] = ' ';
976
977 for (i = 32; i < 35; ++i)
978 ictx->tx.data_buf[i] = 0xFF;
979
980 offset = 0;
981 seq = 0;
982
983 do {
984 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
985 ictx->usb_tx_buf[7] = (unsigned char) seq;
986
987 retval = send_packet(ictx);
988 if (retval) {
989 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
990 goto exit;
991 } else {
992 seq += 2;
993 offset += 7;
994 }
995
996 } while (offset < 35);
997
998 /* Send packet #6 */
999 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
1000 ictx->usb_tx_buf[7] = (unsigned char) seq;
1001 retval = send_packet(ictx);
1002 if (retval)
1003 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
1004
1005 exit:
1006 mutex_unlock(&ictx->lock);
1007
1008 return (!retval) ? n_bytes : retval;
1009 }
1010
1011 /**
1012 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
1013 * packets. We accept data as 16 hexadecimal digits, followed by a
1014 * newline (to make it easy to drive the device from a command-line
1015 * -- even though the actual binary data is a bit complicated).
1016 *
1017 * The device itself is not a "traditional" text-mode display. It's
1018 * actually a 16x96 pixel bitmap display. That means if you want to
1019 * display text, you've got to have your own "font" and translate the
1020 * text into bitmaps for display. This is really flexible (you can
1021 * display whatever diacritics you need, and so on), but it's also
1022 * a lot more complicated than most LCDs...
1023 */
1024 static ssize_t lcd_write(struct file *file, const char __user *buf,
1025 size_t n_bytes, loff_t *pos)
1026 {
1027 int retval = 0;
1028 struct imon_context *ictx;
1029
1030 ictx = file->private_data;
1031 if (!ictx) {
1032 pr_err_ratelimited("no context for device\n");
1033 return -ENODEV;
1034 }
1035
1036 mutex_lock(&ictx->lock);
1037
1038 if (!ictx->display_supported) {
1039 pr_err_ratelimited("no iMON display present\n");
1040 retval = -ENODEV;
1041 goto exit;
1042 }
1043
1044 if (n_bytes != 8) {
1045 pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
1046 (int)n_bytes);
1047 retval = -EINVAL;
1048 goto exit;
1049 }
1050
1051 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
1052 retval = -EFAULT;
1053 goto exit;
1054 }
1055
1056 retval = send_packet(ictx);
1057 if (retval) {
1058 pr_err_ratelimited("send packet failed!\n");
1059 goto exit;
1060 } else {
1061 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
1062 __func__, (int) n_bytes);
1063 }
1064 exit:
1065 mutex_unlock(&ictx->lock);
1066 return (!retval) ? n_bytes : retval;
1067 }
1068
1069 /**
1070 * Callback function for USB core API: transmit data
1071 */
1072 static void usb_tx_callback(struct urb *urb)
1073 {
1074 struct imon_context *ictx;
1075
1076 if (!urb)
1077 return;
1078 ictx = (struct imon_context *)urb->context;
1079 if (!ictx)
1080 return;
1081
1082 ictx->tx.status = urb->status;
1083
1084 /* notify waiters that write has finished */
1085 ictx->tx.busy = false;
1086 smp_rmb(); /* ensure later readers know we're not busy */
1087 complete(&ictx->tx.finished);
1088 }
1089
1090 /**
1091 * report touchscreen input
1092 */
1093 static void imon_touch_display_timeout(struct timer_list *t)
1094 {
1095 struct imon_context *ictx = from_timer(ictx, t, ttimer);
1096
1097 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
1098 return;
1099
1100 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1101 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1102 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
1103 input_sync(ictx->touch);
1104 }
1105
1106 /**
1107 * iMON IR receivers support two different signal sets -- those used by
1108 * the iMON remotes, and those used by the Windows MCE remotes (which is
1109 * really just RC-6), but only one or the other at a time, as the signals
1110 * are decoded onboard the receiver.
1111 *
1112 * This function gets called two different ways, one way is from
1113 * rc_register_device, for initial protocol selection/setup, and the other is
1114 * via a userspace-initiated protocol change request, either by direct sysfs
1115 * prodding or by something like ir-keytable. In the rc_register_device case,
1116 * the imon context lock is already held, but when initiated from userspace,
1117 * it is not, so we must acquire it prior to calling send_packet, which
1118 * requires that the lock is held.
1119 */
1120 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto)
1121 {
1122 int retval;
1123 struct imon_context *ictx = rc->priv;
1124 struct device *dev = ictx->dev;
1125 bool unlock = false;
1126 unsigned char ir_proto_packet[] = {
1127 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1128
1129 if (*rc_proto && !(*rc_proto & rc->allowed_protocols))
1130 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n");
1131
1132 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) {
1133 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1134 ir_proto_packet[0] = 0x01;
1135 *rc_proto = RC_PROTO_BIT_RC6_MCE;
1136 } else if (*rc_proto & RC_PROTO_BIT_OTHER) {
1137 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1138 if (!pad_stabilize)
1139 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1140 /* ir_proto_packet[0] = 0x00; // already the default */
1141 *rc_proto = RC_PROTO_BIT_OTHER;
1142 } else {
1143 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n");
1144 if (!pad_stabilize)
1145 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1146 /* ir_proto_packet[0] = 0x00; // already the default */
1147 *rc_proto = RC_PROTO_BIT_OTHER;
1148 }
1149
1150 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1151
1152 if (!mutex_is_locked(&ictx->lock)) {
1153 unlock = true;
1154 mutex_lock(&ictx->lock);
1155 }
1156
1157 retval = send_packet(ictx);
1158 if (retval)
1159 goto out;
1160
1161 ictx->rc_proto = *rc_proto;
1162 ictx->pad_mouse = false;
1163
1164 out:
1165 if (unlock)
1166 mutex_unlock(&ictx->lock);
1167
1168 return retval;
1169 }
1170
1171 static inline int tv2int(const struct timeval *a, const struct timeval *b)
1172 {
1173 int usecs = 0;
1174 int sec = 0;
1175
1176 if (b->tv_usec > a->tv_usec) {
1177 usecs = 1000000;
1178 sec--;
1179 }
1180
1181 usecs += a->tv_usec - b->tv_usec;
1182
1183 sec += a->tv_sec - b->tv_sec;
1184 sec *= 1000;
1185 usecs /= 1000;
1186 sec += usecs;
1187
1188 if (sec < 0)
1189 sec = 1000;
1190
1191 return sec;
1192 }
1193
1194 /**
1195 * The directional pad behaves a bit differently, depending on whether this is
1196 * one of the older ffdc devices or a newer device. Newer devices appear to
1197 * have a higher resolution matrix for more precise mouse movement, but it
1198 * makes things overly sensitive in keyboard mode, so we do some interesting
1199 * contortions to make it less touchy. Older devices run through the same
1200 * routine with shorter timeout and a smaller threshold.
1201 */
1202 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1203 {
1204 struct timeval ct;
1205 static struct timeval prev_time = {0, 0};
1206 static struct timeval hit_time = {0, 0};
1207 static int x, y, prev_result, hits;
1208 int result = 0;
1209 int msec, msec_hit;
1210
1211 do_gettimeofday(&ct);
1212 msec = tv2int(&ct, &prev_time);
1213 msec_hit = tv2int(&ct, &hit_time);
1214
1215 if (msec > 100) {
1216 x = 0;
1217 y = 0;
1218 hits = 0;
1219 }
1220
1221 x += a;
1222 y += b;
1223
1224 prev_time = ct;
1225
1226 if (abs(x) > threshold || abs(y) > threshold) {
1227 if (abs(y) > abs(x))
1228 result = (y > 0) ? 0x7F : 0x80;
1229 else
1230 result = (x > 0) ? 0x7F00 : 0x8000;
1231
1232 x = 0;
1233 y = 0;
1234
1235 if (result == prev_result) {
1236 hits++;
1237
1238 if (hits > 3) {
1239 switch (result) {
1240 case 0x7F:
1241 y = 17 * threshold / 30;
1242 break;
1243 case 0x80:
1244 y -= 17 * threshold / 30;
1245 break;
1246 case 0x7F00:
1247 x = 17 * threshold / 30;
1248 break;
1249 case 0x8000:
1250 x -= 17 * threshold / 30;
1251 break;
1252 }
1253 }
1254
1255 if (hits == 2 && msec_hit < timeout) {
1256 result = 0;
1257 hits = 1;
1258 }
1259 } else {
1260 prev_result = result;
1261 hits = 1;
1262 hit_time = ct;
1263 }
1264 }
1265
1266 return result;
1267 }
1268
1269 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1270 {
1271 u32 keycode;
1272 u32 release;
1273 bool is_release_code = false;
1274
1275 /* Look for the initial press of a button */
1276 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1277 ictx->rc_toggle = 0x0;
1278 ictx->rc_scancode = scancode;
1279
1280 /* Look for the release of a button */
1281 if (keycode == KEY_RESERVED) {
1282 release = scancode & ~0x4000;
1283 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1284 if (keycode != KEY_RESERVED)
1285 is_release_code = true;
1286 }
1287
1288 ictx->release_code = is_release_code;
1289
1290 return keycode;
1291 }
1292
1293 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1294 {
1295 u32 keycode;
1296
1297 #define MCE_KEY_MASK 0x7000
1298 #define MCE_TOGGLE_BIT 0x8000
1299
1300 /*
1301 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1302 * (the toggle bit flipping between alternating key presses), while
1303 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1304 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1305 * but we can't or them into all codes, as some keys are decoded in
1306 * a different way w/o the same use of the toggle bit...
1307 */
1308 if (scancode & 0x80000000)
1309 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1310
1311 ictx->rc_scancode = scancode;
1312 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1313
1314 /* not used in mce mode, but make sure we know its false */
1315 ictx->release_code = false;
1316
1317 return keycode;
1318 }
1319
1320 static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code)
1321 {
1322 int i;
1323 u32 keycode = KEY_RESERVED;
1324 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table;
1325
1326 for (i = 0; key_table[i].hw_code != 0; i++) {
1327 if (key_table[i].hw_code == (code | 0xffee)) {
1328 keycode = key_table[i].keycode;
1329 break;
1330 }
1331 }
1332 ictx->release_code = false;
1333 return keycode;
1334 }
1335
1336 static bool imon_mouse_event(struct imon_context *ictx,
1337 unsigned char *buf, int len)
1338 {
1339 signed char rel_x = 0x00, rel_y = 0x00;
1340 u8 right_shift = 1;
1341 bool mouse_input = true;
1342 int dir = 0;
1343 unsigned long flags;
1344
1345 spin_lock_irqsave(&ictx->kc_lock, flags);
1346
1347 /* newer iMON device PAD or mouse button */
1348 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1349 rel_x = buf[2];
1350 rel_y = buf[3];
1351 right_shift = 1;
1352 /* 0xffdc iMON PAD or mouse button input */
1353 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1354 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1355 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1356 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1357 if (buf[0] & 0x02)
1358 rel_x |= ~0x0f;
1359 rel_x = rel_x + rel_x / 2;
1360 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1361 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1362 if (buf[0] & 0x01)
1363 rel_y |= ~0x0f;
1364 rel_y = rel_y + rel_y / 2;
1365 right_shift = 2;
1366 /* some ffdc devices decode mouse buttons differently... */
1367 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1368 right_shift = 2;
1369 /* ch+/- buttons, which we use for an emulated scroll wheel */
1370 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1371 dir = 1;
1372 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1373 dir = -1;
1374 } else
1375 mouse_input = false;
1376
1377 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1378
1379 if (mouse_input) {
1380 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1381
1382 if (dir) {
1383 input_report_rel(ictx->idev, REL_WHEEL, dir);
1384 } else if (rel_x || rel_y) {
1385 input_report_rel(ictx->idev, REL_X, rel_x);
1386 input_report_rel(ictx->idev, REL_Y, rel_y);
1387 } else {
1388 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1389 input_report_key(ictx->idev, BTN_RIGHT,
1390 buf[1] >> right_shift & 0x1);
1391 }
1392 input_sync(ictx->idev);
1393 spin_lock_irqsave(&ictx->kc_lock, flags);
1394 ictx->last_keycode = ictx->kc;
1395 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1396 }
1397
1398 return mouse_input;
1399 }
1400
1401 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1402 {
1403 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1404 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1405 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1406 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1407 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1408 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1409 input_sync(ictx->touch);
1410 }
1411
1412 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1413 {
1414 int dir = 0;
1415 signed char rel_x = 0x00, rel_y = 0x00;
1416 u16 timeout, threshold;
1417 u32 scancode = KEY_RESERVED;
1418 unsigned long flags;
1419
1420 /*
1421 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1422 * contain a position coordinate (x,y), with each component ranging
1423 * from -14 to 14. We want to down-sample this to only 4 discrete values
1424 * for up/down/left/right arrow keys. Also, when you get too close to
1425 * diagonals, it has a tendency to jump back and forth, so lets try to
1426 * ignore when they get too close.
1427 */
1428 if (ictx->product != 0xffdc) {
1429 /* first, pad to 8 bytes so it conforms with everything else */
1430 buf[5] = buf[6] = buf[7] = 0;
1431 timeout = 500; /* in msecs */
1432 /* (2*threshold) x (2*threshold) square */
1433 threshold = pad_thresh ? pad_thresh : 28;
1434 rel_x = buf[2];
1435 rel_y = buf[3];
1436
1437 if (ictx->rc_proto == RC_PROTO_BIT_OTHER && pad_stabilize) {
1438 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1439 dir = stabilize((int)rel_x, (int)rel_y,
1440 timeout, threshold);
1441 if (!dir) {
1442 spin_lock_irqsave(&ictx->kc_lock,
1443 flags);
1444 ictx->kc = KEY_UNKNOWN;
1445 spin_unlock_irqrestore(&ictx->kc_lock,
1446 flags);
1447 return;
1448 }
1449 buf[2] = dir & 0xFF;
1450 buf[3] = (dir >> 8) & 0xFF;
1451 scancode = be32_to_cpu(*((__be32 *)buf));
1452 }
1453 } else {
1454 /*
1455 * Hack alert: instead of using keycodes, we have
1456 * to use hard-coded scancodes here...
1457 */
1458 if (abs(rel_y) > abs(rel_x)) {
1459 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1460 buf[3] = 0;
1461 if (rel_y > 0)
1462 scancode = 0x01007f00; /* KEY_DOWN */
1463 else
1464 scancode = 0x01008000; /* KEY_UP */
1465 } else {
1466 buf[2] = 0;
1467 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1468 if (rel_x > 0)
1469 scancode = 0x0100007f; /* KEY_RIGHT */
1470 else
1471 scancode = 0x01000080; /* KEY_LEFT */
1472 }
1473 }
1474
1475 /*
1476 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1477 * device (15c2:ffdc). The remote generates various codes from
1478 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1479 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1480 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1481 * reversed endianness. Extract direction from buffer, rotate endianness,
1482 * adjust sign and feed the values into stabilize(). The resulting codes
1483 * will be 0x01008000, 0x01007F00, which match the newer devices.
1484 */
1485 } else {
1486 timeout = 10; /* in msecs */
1487 /* (2*threshold) x (2*threshold) square */
1488 threshold = pad_thresh ? pad_thresh : 15;
1489
1490 /* buf[1] is x */
1491 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1492 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1493 if (buf[0] & 0x02)
1494 rel_x |= ~0x10+1;
1495 /* buf[2] is y */
1496 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1497 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1498 if (buf[0] & 0x01)
1499 rel_y |= ~0x10+1;
1500
1501 buf[0] = 0x01;
1502 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1503
1504 if (ictx->rc_proto == RC_PROTO_BIT_OTHER && pad_stabilize) {
1505 dir = stabilize((int)rel_x, (int)rel_y,
1506 timeout, threshold);
1507 if (!dir) {
1508 spin_lock_irqsave(&ictx->kc_lock, flags);
1509 ictx->kc = KEY_UNKNOWN;
1510 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1511 return;
1512 }
1513 buf[2] = dir & 0xFF;
1514 buf[3] = (dir >> 8) & 0xFF;
1515 scancode = be32_to_cpu(*((__be32 *)buf));
1516 } else {
1517 /*
1518 * Hack alert: instead of using keycodes, we have
1519 * to use hard-coded scancodes here...
1520 */
1521 if (abs(rel_y) > abs(rel_x)) {
1522 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1523 buf[3] = 0;
1524 if (rel_y > 0)
1525 scancode = 0x01007f00; /* KEY_DOWN */
1526 else
1527 scancode = 0x01008000; /* KEY_UP */
1528 } else {
1529 buf[2] = 0;
1530 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1531 if (rel_x > 0)
1532 scancode = 0x0100007f; /* KEY_RIGHT */
1533 else
1534 scancode = 0x01000080; /* KEY_LEFT */
1535 }
1536 }
1537 }
1538
1539 if (scancode) {
1540 spin_lock_irqsave(&ictx->kc_lock, flags);
1541 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1542 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1543 }
1544 }
1545
1546 /**
1547 * figure out if these is a press or a release. We don't actually
1548 * care about repeats, as those will be auto-generated within the IR
1549 * subsystem for repeating scancodes.
1550 */
1551 static int imon_parse_press_type(struct imon_context *ictx,
1552 unsigned char *buf, u8 ktype)
1553 {
1554 int press_type = 0;
1555 unsigned long flags;
1556
1557 spin_lock_irqsave(&ictx->kc_lock, flags);
1558
1559 /* key release of 0x02XXXXXX key */
1560 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1561 ictx->kc = ictx->last_keycode;
1562
1563 /* mouse button release on (some) 0xffdc devices */
1564 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1565 buf[2] == 0x81 && buf[3] == 0xb7)
1566 ictx->kc = ictx->last_keycode;
1567
1568 /* mouse button release on (some other) 0xffdc devices */
1569 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1570 buf[2] == 0x81 && buf[3] == 0xb7)
1571 ictx->kc = ictx->last_keycode;
1572
1573 /* mce-specific button handling, no keyup events */
1574 else if (ktype == IMON_KEY_MCE) {
1575 ictx->rc_toggle = buf[2];
1576 press_type = 1;
1577
1578 /* incoherent or irrelevant data */
1579 } else if (ictx->kc == KEY_RESERVED)
1580 press_type = -EINVAL;
1581
1582 /* key release of 0xXXXXXXb7 key */
1583 else if (ictx->release_code)
1584 press_type = 0;
1585
1586 /* this is a button press */
1587 else
1588 press_type = 1;
1589
1590 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1591
1592 return press_type;
1593 }
1594
1595 /**
1596 * Process the incoming packet
1597 */
1598 /**
1599 * Convert bit count to time duration (in us) and submit
1600 * the value to lirc_dev.
1601 */
1602 static void submit_data(struct imon_context *context)
1603 {
1604 DEFINE_IR_RAW_EVENT(ev);
1605
1606 ev.pulse = context->rx.prev_bit;
1607 ev.duration = US_TO_NS(context->rx.count * BIT_DURATION);
1608 ir_raw_event_store_with_filter(context->rdev, &ev);
1609 }
1610
1611 /**
1612 * Process the incoming packet
1613 */
1614 static void imon_incoming_ir_raw(struct imon_context *context,
1615 struct urb *urb, int intf)
1616 {
1617 int len = urb->actual_length;
1618 unsigned char *buf = urb->transfer_buffer;
1619 struct device *dev = context->dev;
1620 int octet, bit;
1621 unsigned char mask;
1622
1623 if (len != 8) {
1624 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n",
1625 __func__, len, intf);
1626 return;
1627 }
1628
1629 if (debug)
1630 dev_info(dev, "raw packet: %*ph\n", len, buf);
1631 /*
1632 * Translate received data to pulse and space lengths.
1633 * Received data is active low, i.e. pulses are 0 and
1634 * spaces are 1.
1635 *
1636 * My original algorithm was essentially similar to
1637 * Changwoo Ryu's with the exception that he switched
1638 * the incoming bits to active high and also fed an
1639 * initial space to LIRC at the start of a new sequence
1640 * if the previous bit was a pulse.
1641 *
1642 * I've decided to adopt his algorithm.
1643 */
1644
1645 if (buf[7] == 1 && context->rx.initial_space) {
1646 /* LIRC requires a leading space */
1647 context->rx.prev_bit = 0;
1648 context->rx.count = 4;
1649 submit_data(context);
1650 context->rx.count = 0;
1651 }
1652
1653 for (octet = 0; octet < 5; ++octet) {
1654 mask = 0x80;
1655 for (bit = 0; bit < 8; ++bit) {
1656 int curr_bit = !(buf[octet] & mask);
1657
1658 if (curr_bit != context->rx.prev_bit) {
1659 if (context->rx.count) {
1660 submit_data(context);
1661 context->rx.count = 0;
1662 }
1663 context->rx.prev_bit = curr_bit;
1664 }
1665 ++context->rx.count;
1666 mask >>= 1;
1667 }
1668 }
1669
1670 if (buf[7] == 10) {
1671 if (context->rx.count) {
1672 submit_data(context);
1673 context->rx.count = 0;
1674 }
1675 context->rx.initial_space = context->rx.prev_bit;
1676 }
1677
1678 ir_raw_event_handle(context->rdev);
1679 }
1680
1681 static void imon_incoming_scancode(struct imon_context *ictx,
1682 struct urb *urb, int intf)
1683 {
1684 int len = urb->actual_length;
1685 unsigned char *buf = urb->transfer_buffer;
1686 struct device *dev = ictx->dev;
1687 unsigned long flags;
1688 u32 kc;
1689 u64 scancode;
1690 int press_type = 0;
1691 int msec;
1692 struct timeval t;
1693 static struct timeval prev_time = { 0, 0 };
1694 u8 ktype;
1695
1696 /* filter out junk data on the older 0xffdc imon devices */
1697 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1698 return;
1699
1700 /* Figure out what key was pressed */
1701 if (len == 8 && buf[7] == 0xee) {
1702 scancode = be64_to_cpu(*((__be64 *)buf));
1703 ktype = IMON_KEY_PANEL;
1704 kc = imon_panel_key_lookup(ictx, scancode);
1705 ictx->release_code = false;
1706 } else {
1707 scancode = be32_to_cpu(*((__be32 *)buf));
1708 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) {
1709 ktype = IMON_KEY_IMON;
1710 if (buf[0] == 0x80)
1711 ktype = IMON_KEY_MCE;
1712 kc = imon_mce_key_lookup(ictx, scancode);
1713 } else {
1714 ktype = IMON_KEY_IMON;
1715 kc = imon_remote_key_lookup(ictx, scancode);
1716 }
1717 }
1718
1719 spin_lock_irqsave(&ictx->kc_lock, flags);
1720 /* keyboard/mouse mode toggle button */
1721 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1722 ictx->last_keycode = kc;
1723 if (!nomouse) {
1724 ictx->pad_mouse = !ictx->pad_mouse;
1725 dev_dbg(dev, "toggling to %s mode\n",
1726 ictx->pad_mouse ? "mouse" : "keyboard");
1727 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1728 return;
1729 } else {
1730 ictx->pad_mouse = false;
1731 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1732 }
1733 }
1734
1735 ictx->kc = kc;
1736 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1737
1738 /* send touchscreen events through input subsystem if touchpad data */
1739 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1740 buf[7] == 0x86) {
1741 imon_touch_event(ictx, buf);
1742 return;
1743
1744 /* look for mouse events with pad in mouse mode */
1745 } else if (ictx->pad_mouse) {
1746 if (imon_mouse_event(ictx, buf, len))
1747 return;
1748 }
1749
1750 /* Now for some special handling to convert pad input to arrow keys */
1751 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1752 ((len == 8) && (buf[0] & 0x40) &&
1753 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1754 len = 8;
1755 imon_pad_to_keys(ictx, buf);
1756 }
1757
1758 if (debug) {
1759 printk(KERN_INFO "intf%d decoded packet: %*ph\n",
1760 intf, len, buf);
1761 }
1762
1763 press_type = imon_parse_press_type(ictx, buf, ktype);
1764 if (press_type < 0)
1765 goto not_input_data;
1766
1767 if (ktype != IMON_KEY_PANEL) {
1768 if (press_type == 0)
1769 rc_keyup(ictx->rdev);
1770 else {
1771 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE ||
1772 ictx->rc_proto == RC_PROTO_BIT_OTHER)
1773 rc_keydown(ictx->rdev,
1774 ictx->rc_proto == RC_PROTO_BIT_RC6_MCE ? RC_PROTO_RC6_MCE : RC_PROTO_OTHER,
1775 ictx->rc_scancode, ictx->rc_toggle);
1776 spin_lock_irqsave(&ictx->kc_lock, flags);
1777 ictx->last_keycode = ictx->kc;
1778 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1779 }
1780 return;
1781 }
1782
1783 /* Only panel type events left to process now */
1784 spin_lock_irqsave(&ictx->kc_lock, flags);
1785
1786 do_gettimeofday(&t);
1787 /* KEY_MUTE repeats from knob need to be suppressed */
1788 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1789 msec = tv2int(&t, &prev_time);
1790 if (msec < ictx->idev->rep[REP_DELAY]) {
1791 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1792 return;
1793 }
1794 }
1795 prev_time = t;
1796 kc = ictx->kc;
1797
1798 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1799
1800 input_report_key(ictx->idev, kc, press_type);
1801 input_sync(ictx->idev);
1802
1803 /* panel keys don't generate a release */
1804 input_report_key(ictx->idev, kc, 0);
1805 input_sync(ictx->idev);
1806
1807 spin_lock_irqsave(&ictx->kc_lock, flags);
1808 ictx->last_keycode = kc;
1809 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1810
1811 return;
1812
1813 not_input_data:
1814 if (len != 8) {
1815 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n",
1816 __func__, len, intf);
1817 return;
1818 }
1819
1820 /* iMON 2.4G associate frame */
1821 if (buf[0] == 0x00 &&
1822 buf[2] == 0xFF && /* REFID */
1823 buf[3] == 0xFF &&
1824 buf[4] == 0xFF &&
1825 buf[5] == 0xFF && /* iMON 2.4G */
1826 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1827 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1828 dev_warn(dev, "%s: remote associated refid=%02X\n",
1829 __func__, buf[1]);
1830 ictx->rf_isassociating = false;
1831 }
1832 }
1833
1834 /**
1835 * Callback function for USB core API: receive data
1836 */
1837 static void usb_rx_callback_intf0(struct urb *urb)
1838 {
1839 struct imon_context *ictx;
1840 int intfnum = 0;
1841
1842 if (!urb)
1843 return;
1844
1845 ictx = (struct imon_context *)urb->context;
1846 if (!ictx)
1847 return;
1848
1849 /*
1850 * if we get a callback before we're done configuring the hardware, we
1851 * can't yet process the data, as there's nowhere to send it, but we
1852 * still need to submit a new rx URB to avoid wedging the hardware
1853 */
1854 if (!ictx->dev_present_intf0)
1855 goto out;
1856
1857 switch (urb->status) {
1858 case -ENOENT: /* usbcore unlink successful! */
1859 return;
1860
1861 case -ESHUTDOWN: /* transport endpoint was shut down */
1862 break;
1863
1864 case 0:
1865 if (ictx->rdev->driver_type == RC_DRIVER_IR_RAW)
1866 imon_incoming_ir_raw(ictx, urb, intfnum);
1867 else
1868 imon_incoming_scancode(ictx, urb, intfnum);
1869 break;
1870
1871 default:
1872 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1873 __func__, urb->status);
1874 break;
1875 }
1876
1877 out:
1878 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1879 }
1880
1881 static void usb_rx_callback_intf1(struct urb *urb)
1882 {
1883 struct imon_context *ictx;
1884 int intfnum = 1;
1885
1886 if (!urb)
1887 return;
1888
1889 ictx = (struct imon_context *)urb->context;
1890 if (!ictx)
1891 return;
1892
1893 /*
1894 * if we get a callback before we're done configuring the hardware, we
1895 * can't yet process the data, as there's nowhere to send it, but we
1896 * still need to submit a new rx URB to avoid wedging the hardware
1897 */
1898 if (!ictx->dev_present_intf1)
1899 goto out;
1900
1901 switch (urb->status) {
1902 case -ENOENT: /* usbcore unlink successful! */
1903 return;
1904
1905 case -ESHUTDOWN: /* transport endpoint was shut down */
1906 break;
1907
1908 case 0:
1909 if (ictx->rdev->driver_type == RC_DRIVER_IR_RAW)
1910 imon_incoming_ir_raw(ictx, urb, intfnum);
1911 else
1912 imon_incoming_scancode(ictx, urb, intfnum);
1913 break;
1914
1915 default:
1916 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1917 __func__, urb->status);
1918 break;
1919 }
1920
1921 out:
1922 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1923 }
1924
1925 /*
1926 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1927 * devices, and all of them constantly spew interrupts, even when there
1928 * is no actual data to report. However, byte 6 of this buffer looks like
1929 * its unique across device variants, so we're trying to key off that to
1930 * figure out which display type (if any) and what IR protocol the device
1931 * actually supports. These devices have their IR protocol hard-coded into
1932 * their firmware, they can't be changed on the fly like the newer hardware.
1933 */
1934 static void imon_get_ffdc_type(struct imon_context *ictx)
1935 {
1936 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1937 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1938 u64 allowed_protos = RC_PROTO_BIT_OTHER;
1939
1940 switch (ffdc_cfg_byte) {
1941 /* iMON Knob, no display, iMON IR + vol knob */
1942 case 0x21:
1943 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1944 ictx->display_supported = false;
1945 break;
1946 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1947 case 0x4e:
1948 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1949 ictx->display_supported = false;
1950 ictx->rf_device = true;
1951 break;
1952 /* iMON VFD, no IR (does have vol knob tho) */
1953 case 0x35:
1954 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1955 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1956 break;
1957 /* iMON VFD, iMON IR */
1958 case 0x24:
1959 case 0x85:
1960 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1961 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1962 break;
1963 /* iMON VFD, MCE IR */
1964 case 0x46:
1965 case 0x7e:
1966 case 0x9e:
1967 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1968 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1969 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1970 break;
1971 /* iMON LCD, MCE IR */
1972 case 0x9f:
1973 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1974 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1975 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1976 break;
1977 default:
1978 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR");
1979 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1980 /* We don't know which one it is, allow user to set the
1981 * RC6 one from userspace if OTHER wasn't correct. */
1982 allowed_protos |= RC_PROTO_BIT_RC6_MCE;
1983 break;
1984 }
1985
1986 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1987
1988 ictx->display_type = detected_display_type;
1989 ictx->rc_proto = allowed_protos;
1990 }
1991
1992 static void imon_set_display_type(struct imon_context *ictx)
1993 {
1994 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1995
1996 /*
1997 * Try to auto-detect the type of display if the user hasn't set
1998 * it by hand via the display_type modparam. Default is VFD.
1999 */
2000
2001 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
2002 switch (ictx->product) {
2003 case 0xffdc:
2004 /* set in imon_get_ffdc_type() */
2005 configured_display_type = ictx->display_type;
2006 break;
2007 case 0x0034:
2008 case 0x0035:
2009 configured_display_type = IMON_DISPLAY_TYPE_VGA;
2010 break;
2011 case 0x0038:
2012 case 0x0039:
2013 case 0x0045:
2014 configured_display_type = IMON_DISPLAY_TYPE_LCD;
2015 break;
2016 case 0x003c:
2017 case 0x0041:
2018 case 0x0042:
2019 case 0x0043:
2020 case 0x8001:
2021 case 0xff30:
2022 configured_display_type = IMON_DISPLAY_TYPE_NONE;
2023 ictx->display_supported = false;
2024 break;
2025 case 0x0036:
2026 case 0x0044:
2027 case 0xffda:
2028 default:
2029 configured_display_type = IMON_DISPLAY_TYPE_VFD;
2030 break;
2031 }
2032 } else {
2033 configured_display_type = display_type;
2034 if (display_type == IMON_DISPLAY_TYPE_NONE)
2035 ictx->display_supported = false;
2036 else
2037 ictx->display_supported = true;
2038 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n",
2039 __func__, display_type);
2040 }
2041
2042 ictx->display_type = configured_display_type;
2043 }
2044
2045 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
2046 {
2047 struct rc_dev *rdev;
2048 int ret;
2049 static const unsigned char fp_packet[] = {
2050 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 };
2051
2052 rdev = rc_allocate_device(ictx->dev_descr->flags & IMON_IR_RAW ?
2053 RC_DRIVER_IR_RAW : RC_DRIVER_SCANCODE);
2054 if (!rdev) {
2055 dev_err(ictx->dev, "remote control dev allocation failed\n");
2056 goto out;
2057 }
2058
2059 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
2060 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
2061 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
2062 sizeof(ictx->phys_rdev));
2063 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
2064
2065 rdev->device_name = ictx->name_rdev;
2066 rdev->input_phys = ictx->phys_rdev;
2067 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
2068 rdev->dev.parent = ictx->dev;
2069
2070 rdev->priv = ictx;
2071 if (ictx->dev_descr->flags & IMON_IR_RAW)
2072 rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
2073 else
2074 /* iMON PAD or MCE */
2075 rdev->allowed_protocols = RC_PROTO_BIT_OTHER |
2076 RC_PROTO_BIT_RC6_MCE;
2077 rdev->change_protocol = imon_ir_change_protocol;
2078 rdev->driver_name = MOD_NAME;
2079
2080 /* Enable front-panel buttons and/or knobs */
2081 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
2082 ret = send_packet(ictx);
2083 /* Not fatal, but warn about it */
2084 if (ret)
2085 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
2086
2087 if (ictx->product == 0xffdc) {
2088 imon_get_ffdc_type(ictx);
2089 rdev->allowed_protocols = ictx->rc_proto;
2090 }
2091
2092 imon_set_display_type(ictx);
2093
2094 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE ||
2095 ictx->dev_descr->flags & IMON_IR_RAW)
2096 rdev->map_name = RC_MAP_IMON_MCE;
2097 else
2098 rdev->map_name = RC_MAP_IMON_PAD;
2099
2100 ret = rc_register_device(rdev);
2101 if (ret < 0) {
2102 dev_err(ictx->dev, "remote input dev register failed\n");
2103 goto out;
2104 }
2105
2106 return rdev;
2107
2108 out:
2109 rc_free_device(rdev);
2110 return NULL;
2111 }
2112
2113 static struct input_dev *imon_init_idev(struct imon_context *ictx)
2114 {
2115 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table;
2116 struct input_dev *idev;
2117 int ret, i;
2118
2119 idev = input_allocate_device();
2120 if (!idev)
2121 goto out;
2122
2123 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
2124 "iMON Panel, Knob and Mouse(%04x:%04x)",
2125 ictx->vendor, ictx->product);
2126 idev->name = ictx->name_idev;
2127
2128 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
2129 sizeof(ictx->phys_idev));
2130 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
2131 idev->phys = ictx->phys_idev;
2132
2133 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
2134
2135 idev->keybit[BIT_WORD(BTN_MOUSE)] =
2136 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2137 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
2138 BIT_MASK(REL_WHEEL);
2139
2140 /* panel and/or knob code support */
2141 for (i = 0; key_table[i].hw_code != 0; i++) {
2142 u32 kc = key_table[i].keycode;
2143 __set_bit(kc, idev->keybit);
2144 }
2145
2146 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
2147 idev->dev.parent = ictx->dev;
2148 input_set_drvdata(idev, ictx);
2149
2150 ret = input_register_device(idev);
2151 if (ret < 0) {
2152 dev_err(ictx->dev, "input dev register failed\n");
2153 goto out;
2154 }
2155
2156 return idev;
2157
2158 out:
2159 input_free_device(idev);
2160 return NULL;
2161 }
2162
2163 static struct input_dev *imon_init_touch(struct imon_context *ictx)
2164 {
2165 struct input_dev *touch;
2166 int ret;
2167
2168 touch = input_allocate_device();
2169 if (!touch)
2170 goto touch_alloc_failed;
2171
2172 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
2173 "iMON USB Touchscreen (%04x:%04x)",
2174 ictx->vendor, ictx->product);
2175 touch->name = ictx->name_touch;
2176
2177 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
2178 sizeof(ictx->phys_touch));
2179 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
2180 touch->phys = ictx->phys_touch;
2181
2182 touch->evbit[0] =
2183 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
2184 touch->keybit[BIT_WORD(BTN_TOUCH)] =
2185 BIT_MASK(BTN_TOUCH);
2186 input_set_abs_params(touch, ABS_X,
2187 0x00, 0xfff, 0, 0);
2188 input_set_abs_params(touch, ABS_Y,
2189 0x00, 0xfff, 0, 0);
2190
2191 input_set_drvdata(touch, ictx);
2192
2193 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
2194 touch->dev.parent = ictx->dev;
2195 ret = input_register_device(touch);
2196 if (ret < 0) {
2197 dev_info(ictx->dev, "touchscreen input dev register failed\n");
2198 goto touch_register_failed;
2199 }
2200
2201 return touch;
2202
2203 touch_register_failed:
2204 input_free_device(touch);
2205
2206 touch_alloc_failed:
2207 return NULL;
2208 }
2209
2210 static bool imon_find_endpoints(struct imon_context *ictx,
2211 struct usb_host_interface *iface_desc)
2212 {
2213 struct usb_endpoint_descriptor *ep;
2214 struct usb_endpoint_descriptor *rx_endpoint = NULL;
2215 struct usb_endpoint_descriptor *tx_endpoint = NULL;
2216 int ifnum = iface_desc->desc.bInterfaceNumber;
2217 int num_endpts = iface_desc->desc.bNumEndpoints;
2218 int i, ep_dir, ep_type;
2219 bool ir_ep_found = false;
2220 bool display_ep_found = false;
2221 bool tx_control = false;
2222
2223 /*
2224 * Scan the endpoint list and set:
2225 * first input endpoint = IR endpoint
2226 * first output endpoint = display endpoint
2227 */
2228 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2229 ep = &iface_desc->endpoint[i].desc;
2230 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2231 ep_type = usb_endpoint_type(ep);
2232
2233 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2234 ep_type == USB_ENDPOINT_XFER_INT) {
2235
2236 rx_endpoint = ep;
2237 ir_ep_found = true;
2238 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2239
2240 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2241 ep_type == USB_ENDPOINT_XFER_INT) {
2242 tx_endpoint = ep;
2243 display_ep_found = true;
2244 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2245 }
2246 }
2247
2248 if (ifnum == 0) {
2249 ictx->rx_endpoint_intf0 = rx_endpoint;
2250 /*
2251 * tx is used to send characters to lcd/vfd, associate RF
2252 * remotes, set IR protocol, and maybe more...
2253 */
2254 ictx->tx_endpoint = tx_endpoint;
2255 } else {
2256 ictx->rx_endpoint_intf1 = rx_endpoint;
2257 }
2258
2259 /*
2260 * If we didn't find a display endpoint, this is probably one of the
2261 * newer iMON devices that use control urb instead of interrupt
2262 */
2263 if (!display_ep_found) {
2264 tx_control = true;
2265 display_ep_found = true;
2266 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n",
2267 __func__);
2268 }
2269
2270 /*
2271 * Some iMON receivers have no display. Unfortunately, it seems
2272 * that SoundGraph recycles device IDs between devices both with
2273 * and without... :\
2274 */
2275 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2276 display_ep_found = false;
2277 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2278 }
2279
2280 /*
2281 * iMON Touch devices have a VGA touchscreen, but no "display", as
2282 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2283 */
2284 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2285 display_ep_found = false;
2286 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2287 }
2288
2289 /* Input endpoint is mandatory */
2290 if (!ir_ep_found)
2291 pr_err("no valid input (IR) endpoint found\n");
2292
2293 ictx->tx_control = tx_control;
2294
2295 if (display_ep_found)
2296 ictx->display_supported = true;
2297
2298 return ir_ep_found;
2299
2300 }
2301
2302 static struct imon_context *imon_init_intf0(struct usb_interface *intf,
2303 const struct usb_device_id *id)
2304 {
2305 struct imon_context *ictx;
2306 struct urb *rx_urb;
2307 struct urb *tx_urb;
2308 struct device *dev = &intf->dev;
2309 struct usb_host_interface *iface_desc;
2310 int ret = -ENOMEM;
2311
2312 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL);
2313 if (!ictx)
2314 goto exit;
2315
2316 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2317 if (!rx_urb)
2318 goto rx_urb_alloc_failed;
2319 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2320 if (!tx_urb)
2321 goto tx_urb_alloc_failed;
2322
2323 mutex_init(&ictx->lock);
2324 spin_lock_init(&ictx->kc_lock);
2325
2326 mutex_lock(&ictx->lock);
2327
2328 ictx->dev = dev;
2329 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2330 ictx->rx_urb_intf0 = rx_urb;
2331 ictx->tx_urb = tx_urb;
2332 ictx->rf_device = false;
2333
2334 init_completion(&ictx->tx.finished);
2335
2336 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2337 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2338
2339 /* save drive info for later accessing the panel/knob key table */
2340 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info;
2341 /* default send_packet delay is 5ms but some devices need more */
2342 ictx->send_packet_delay = ictx->dev_descr->flags &
2343 IMON_NEED_20MS_PKT_DELAY ? 20 : 5;
2344
2345 ret = -ENODEV;
2346 iface_desc = intf->cur_altsetting;
2347 if (!imon_find_endpoints(ictx, iface_desc)) {
2348 goto find_endpoint_failed;
2349 }
2350
2351 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2352 usb_rcvintpipe(ictx->usbdev_intf0,
2353 ictx->rx_endpoint_intf0->bEndpointAddress),
2354 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2355 usb_rx_callback_intf0, ictx,
2356 ictx->rx_endpoint_intf0->bInterval);
2357
2358 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2359 if (ret) {
2360 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2361 goto urb_submit_failed;
2362 }
2363
2364 ictx->idev = imon_init_idev(ictx);
2365 if (!ictx->idev) {
2366 dev_err(dev, "%s: input device setup failed\n", __func__);
2367 goto idev_setup_failed;
2368 }
2369
2370 ictx->rdev = imon_init_rdev(ictx);
2371 if (!ictx->rdev) {
2372 dev_err(dev, "%s: rc device setup failed\n", __func__);
2373 goto rdev_setup_failed;
2374 }
2375
2376 ictx->dev_present_intf0 = true;
2377
2378 mutex_unlock(&ictx->lock);
2379 return ictx;
2380
2381 rdev_setup_failed:
2382 input_unregister_device(ictx->idev);
2383 idev_setup_failed:
2384 usb_kill_urb(ictx->rx_urb_intf0);
2385 urb_submit_failed:
2386 find_endpoint_failed:
2387 usb_put_dev(ictx->usbdev_intf0);
2388 mutex_unlock(&ictx->lock);
2389 usb_free_urb(tx_urb);
2390 tx_urb_alloc_failed:
2391 usb_free_urb(rx_urb);
2392 rx_urb_alloc_failed:
2393 kfree(ictx);
2394 exit:
2395 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2396
2397 return NULL;
2398 }
2399
2400 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2401 struct imon_context *ictx)
2402 {
2403 struct urb *rx_urb;
2404 struct usb_host_interface *iface_desc;
2405 int ret = -ENOMEM;
2406
2407 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2408 if (!rx_urb)
2409 goto rx_urb_alloc_failed;
2410
2411 mutex_lock(&ictx->lock);
2412
2413 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2414 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0);
2415 }
2416
2417 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2418 ictx->rx_urb_intf1 = rx_urb;
2419
2420 ret = -ENODEV;
2421 iface_desc = intf->cur_altsetting;
2422 if (!imon_find_endpoints(ictx, iface_desc))
2423 goto find_endpoint_failed;
2424
2425 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2426 ictx->touch = imon_init_touch(ictx);
2427 if (!ictx->touch)
2428 goto touch_setup_failed;
2429 } else
2430 ictx->touch = NULL;
2431
2432 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2433 usb_rcvintpipe(ictx->usbdev_intf1,
2434 ictx->rx_endpoint_intf1->bEndpointAddress),
2435 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2436 usb_rx_callback_intf1, ictx,
2437 ictx->rx_endpoint_intf1->bInterval);
2438
2439 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2440
2441 if (ret) {
2442 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2443 goto urb_submit_failed;
2444 }
2445
2446 ictx->dev_present_intf1 = true;
2447
2448 mutex_unlock(&ictx->lock);
2449 return ictx;
2450
2451 urb_submit_failed:
2452 if (ictx->touch)
2453 input_unregister_device(ictx->touch);
2454 touch_setup_failed:
2455 find_endpoint_failed:
2456 usb_put_dev(ictx->usbdev_intf1);
2457 mutex_unlock(&ictx->lock);
2458 usb_free_urb(rx_urb);
2459 rx_urb_alloc_failed:
2460 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
2461
2462 return NULL;
2463 }
2464
2465 static void imon_init_display(struct imon_context *ictx,
2466 struct usb_interface *intf)
2467 {
2468 int ret;
2469
2470 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2471
2472 /* set up sysfs entry for built-in clock */
2473 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2474 if (ret)
2475 dev_err(ictx->dev, "Could not create display sysfs entries(%d)",
2476 ret);
2477
2478 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2479 ret = usb_register_dev(intf, &imon_lcd_class);
2480 else
2481 ret = usb_register_dev(intf, &imon_vfd_class);
2482 if (ret)
2483 /* Not a fatal error, so ignore */
2484 dev_info(ictx->dev, "could not get a minor number for display\n");
2485
2486 }
2487
2488 /**
2489 * Callback function for USB core API: Probe
2490 */
2491 static int imon_probe(struct usb_interface *interface,
2492 const struct usb_device_id *id)
2493 {
2494 struct usb_device *usbdev = NULL;
2495 struct usb_host_interface *iface_desc = NULL;
2496 struct usb_interface *first_if;
2497 struct device *dev = &interface->dev;
2498 int ifnum, sysfs_err;
2499 int ret = 0;
2500 struct imon_context *ictx = NULL;
2501 struct imon_context *first_if_ctx = NULL;
2502 u16 vendor, product;
2503
2504 usbdev = usb_get_dev(interface_to_usbdev(interface));
2505 iface_desc = interface->cur_altsetting;
2506 ifnum = iface_desc->desc.bInterfaceNumber;
2507 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2508 product = le16_to_cpu(usbdev->descriptor.idProduct);
2509
2510 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2511 __func__, vendor, product, ifnum);
2512
2513 /* prevent races probing devices w/multiple interfaces */
2514 mutex_lock(&driver_lock);
2515
2516 first_if = usb_ifnum_to_if(usbdev, 0);
2517 if (!first_if) {
2518 ret = -ENODEV;
2519 goto fail;
2520 }
2521
2522 first_if_ctx = usb_get_intfdata(first_if);
2523
2524 if (ifnum == 0) {
2525 ictx = imon_init_intf0(interface, id);
2526 if (!ictx) {
2527 pr_err("failed to initialize context!\n");
2528 ret = -ENODEV;
2529 goto fail;
2530 }
2531
2532 } else {
2533 /* this is the secondary interface on the device */
2534
2535 /* fail early if first intf failed to register */
2536 if (!first_if_ctx) {
2537 ret = -ENODEV;
2538 goto fail;
2539 }
2540
2541 ictx = imon_init_intf1(interface, first_if_ctx);
2542 if (!ictx) {
2543 pr_err("failed to attach to context!\n");
2544 ret = -ENODEV;
2545 goto fail;
2546 }
2547
2548 }
2549
2550 usb_set_intfdata(interface, ictx);
2551
2552 if (ifnum == 0) {
2553 mutex_lock(&ictx->lock);
2554
2555 if (product == 0xffdc && ictx->rf_device) {
2556 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2557 &imon_rf_attr_group);
2558 if (sysfs_err)
2559 pr_err("Could not create RF sysfs entries(%d)\n",
2560 sysfs_err);
2561 }
2562
2563 if (ictx->display_supported)
2564 imon_init_display(ictx, interface);
2565
2566 mutex_unlock(&ictx->lock);
2567 }
2568
2569 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n",
2570 vendor, product, ifnum,
2571 usbdev->bus->busnum, usbdev->devnum);
2572
2573 mutex_unlock(&driver_lock);
2574 usb_put_dev(usbdev);
2575
2576 return 0;
2577
2578 fail:
2579 mutex_unlock(&driver_lock);
2580 usb_put_dev(usbdev);
2581 dev_err(dev, "unable to register, err %d\n", ret);
2582
2583 return ret;
2584 }
2585
2586 /**
2587 * Callback function for USB core API: disconnect
2588 */
2589 static void imon_disconnect(struct usb_interface *interface)
2590 {
2591 struct imon_context *ictx;
2592 struct device *dev;
2593 int ifnum;
2594
2595 /* prevent races with multi-interface device probing and display_open */
2596 mutex_lock(&driver_lock);
2597
2598 ictx = usb_get_intfdata(interface);
2599 dev = ictx->dev;
2600 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2601
2602 /*
2603 * sysfs_remove_group is safe to call even if sysfs_create_group
2604 * hasn't been called
2605 */
2606 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2607 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2608
2609 usb_set_intfdata(interface, NULL);
2610
2611 /* Abort ongoing write */
2612 if (ictx->tx.busy) {
2613 usb_kill_urb(ictx->tx_urb);
2614 complete(&ictx->tx.finished);
2615 }
2616
2617 if (ifnum == 0) {
2618 ictx->dev_present_intf0 = false;
2619 usb_kill_urb(ictx->rx_urb_intf0);
2620 usb_put_dev(ictx->usbdev_intf0);
2621 input_unregister_device(ictx->idev);
2622 rc_unregister_device(ictx->rdev);
2623 if (ictx->display_supported) {
2624 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2625 usb_deregister_dev(interface, &imon_lcd_class);
2626 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
2627 usb_deregister_dev(interface, &imon_vfd_class);
2628 }
2629 } else {
2630 ictx->dev_present_intf1 = false;
2631 usb_kill_urb(ictx->rx_urb_intf1);
2632 usb_put_dev(ictx->usbdev_intf1);
2633 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2634 input_unregister_device(ictx->touch);
2635 del_timer_sync(&ictx->ttimer);
2636 }
2637 }
2638
2639 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1)
2640 free_imon_context(ictx);
2641
2642 mutex_unlock(&driver_lock);
2643
2644 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2645 __func__, ifnum);
2646 }
2647
2648 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2649 {
2650 struct imon_context *ictx = usb_get_intfdata(intf);
2651 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2652
2653 if (ifnum == 0)
2654 usb_kill_urb(ictx->rx_urb_intf0);
2655 else
2656 usb_kill_urb(ictx->rx_urb_intf1);
2657
2658 return 0;
2659 }
2660
2661 static int imon_resume(struct usb_interface *intf)
2662 {
2663 int rc = 0;
2664 struct imon_context *ictx = usb_get_intfdata(intf);
2665 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2666
2667 if (ifnum == 0) {
2668 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2669 usb_rcvintpipe(ictx->usbdev_intf0,
2670 ictx->rx_endpoint_intf0->bEndpointAddress),
2671 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2672 usb_rx_callback_intf0, ictx,
2673 ictx->rx_endpoint_intf0->bInterval);
2674
2675 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2676
2677 } else {
2678 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2679 usb_rcvintpipe(ictx->usbdev_intf1,
2680 ictx->rx_endpoint_intf1->bEndpointAddress),
2681 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2682 usb_rx_callback_intf1, ictx,
2683 ictx->rx_endpoint_intf1->bInterval);
2684
2685 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2686 }
2687
2688 return rc;
2689 }
2690
2691 module_usb_driver(imon_driver);
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