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Merge tag 'for-3.8-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / rc / imon.c
1 /*
2 * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
3 *
4 * Copyright(C) 2010 Jarod Wilson <jarod@wilsonet.com>
5 * Portions based on the original lirc_imon driver,
6 * Copyright(C) 2004 Venky Raju(dev@venky.ws)
7 *
8 * Huge thanks to R. Geoff Newbury for invaluable debugging on the
9 * 0xffdc iMON devices, and for sending me one to hack on, without
10 * which the support for them wouldn't be nearly as good. Thanks
11 * also to the numerous 0xffdc device owners that tested auto-config
12 * support for me and provided debug dumps from their devices.
13 *
14 * imon is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
30
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/slab.h>
36 #include <linux/uaccess.h>
37 #include <linux/ratelimit.h>
38
39 #include <linux/input.h>
40 #include <linux/usb.h>
41 #include <linux/usb/input.h>
42 #include <media/rc-core.h>
43
44 #include <linux/time.h>
45 #include <linux/timer.h>
46
47 #define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
48 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
49 #define MOD_NAME "imon"
50 #define MOD_VERSION "0.9.4"
51
52 #define DISPLAY_MINOR_BASE 144
53 #define DEVICE_NAME "lcd%d"
54
55 #define BUF_CHUNK_SIZE 8
56 #define BUF_SIZE 128
57
58 #define BIT_DURATION 250 /* each bit received is 250us */
59
60 #define IMON_CLOCK_ENABLE_PACKETS 2
61
62 /*** P R O T O T Y P E S ***/
63
64 /* USB Callback prototypes */
65 static int imon_probe(struct usb_interface *interface,
66 const struct usb_device_id *id);
67 static void imon_disconnect(struct usb_interface *interface);
68 static void usb_rx_callback_intf0(struct urb *urb);
69 static void usb_rx_callback_intf1(struct urb *urb);
70 static void usb_tx_callback(struct urb *urb);
71
72 /* suspend/resume support */
73 static int imon_resume(struct usb_interface *intf);
74 static int imon_suspend(struct usb_interface *intf, pm_message_t message);
75
76 /* Display file_operations function prototypes */
77 static int display_open(struct inode *inode, struct file *file);
78 static int display_close(struct inode *inode, struct file *file);
79
80 /* VFD write operation */
81 static ssize_t vfd_write(struct file *file, const char *buf,
82 size_t n_bytes, loff_t *pos);
83
84 /* LCD file_operations override function prototypes */
85 static ssize_t lcd_write(struct file *file, const char *buf,
86 size_t n_bytes, loff_t *pos);
87
88 /*** G L O B A L S ***/
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
116 struct tx_t {
117 unsigned char data_buf[35]; /* user data buffer */
118 struct completion finished; /* wait for write to finish */
119 bool busy; /* write in progress */
120 int status; /* status of tx completion */
121 } tx;
122
123 u16 vendor; /* usb vendor ID */
124 u16 product; /* usb product ID */
125
126 struct rc_dev *rdev; /* rc-core device for remote */
127 struct input_dev *idev; /* input device for panel & IR mouse */
128 struct input_dev *touch; /* input device for touchscreen */
129
130 spinlock_t kc_lock; /* make sure we get keycodes right */
131 u32 kc; /* current input keycode */
132 u32 last_keycode; /* last reported input keycode */
133 u32 rc_scancode; /* the computed remote scancode */
134 u8 rc_toggle; /* the computed remote toggle bit */
135 u64 rc_type; /* iMON or MCE (RC6) IR protocol? */
136 bool release_code; /* some keys send a release code */
137
138 u8 display_type; /* store the display type */
139 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
140
141 char name_rdev[128]; /* rc input device name */
142 char phys_rdev[64]; /* rc input device phys path */
143
144 char name_idev[128]; /* input device name */
145 char phys_idev[64]; /* input device phys path */
146
147 char name_touch[128]; /* touch screen name */
148 char phys_touch[64]; /* touch screen phys path */
149 struct timer_list ttimer; /* touch screen timer */
150 int touch_x; /* x coordinate on touchscreen */
151 int touch_y; /* y coordinate on touchscreen */
152 };
153
154 #define TOUCH_TIMEOUT (HZ/30)
155
156 /* vfd character device file operations */
157 static const struct file_operations vfd_fops = {
158 .owner = THIS_MODULE,
159 .open = &display_open,
160 .write = &vfd_write,
161 .release = &display_close,
162 .llseek = noop_llseek,
163 };
164
165 /* lcd character device file operations */
166 static const struct file_operations lcd_fops = {
167 .owner = THIS_MODULE,
168 .open = &display_open,
169 .write = &lcd_write,
170 .release = &display_close,
171 .llseek = noop_llseek,
172 };
173
174 enum {
175 IMON_DISPLAY_TYPE_AUTO = 0,
176 IMON_DISPLAY_TYPE_VFD = 1,
177 IMON_DISPLAY_TYPE_LCD = 2,
178 IMON_DISPLAY_TYPE_VGA = 3,
179 IMON_DISPLAY_TYPE_NONE = 4,
180 };
181
182 enum {
183 IMON_KEY_IMON = 0,
184 IMON_KEY_MCE = 1,
185 IMON_KEY_PANEL = 2,
186 };
187
188 /*
189 * USB Device ID for iMON USB Control Boards
190 *
191 * The Windows drivers contain 6 different inf files, more or less one for
192 * each new device until the 0x0034-0x0046 devices, which all use the same
193 * driver. Some of the devices in the 34-46 range haven't been definitively
194 * identified yet. Early devices have either a TriGem Computer, Inc. or a
195 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
196 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
197 * the ffdc and later devices, which do onboard decoding.
198 */
199 static struct usb_device_id imon_usb_id_table[] = {
200 /*
201 * Several devices with this same device ID, all use iMON_PAD.inf
202 * SoundGraph iMON PAD (IR & VFD)
203 * SoundGraph iMON PAD (IR & LCD)
204 * SoundGraph iMON Knob (IR only)
205 */
206 { USB_DEVICE(0x15c2, 0xffdc) },
207
208 /*
209 * Newer devices, all driven by the latest iMON Windows driver, full
210 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
211 * Need user input to fill in details on unknown devices.
212 */
213 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
214 { USB_DEVICE(0x15c2, 0x0034) },
215 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
216 { USB_DEVICE(0x15c2, 0x0035) },
217 /* SoundGraph iMON OEM VFD (IR & VFD) */
218 { USB_DEVICE(0x15c2, 0x0036) },
219 /* device specifics unknown */
220 { USB_DEVICE(0x15c2, 0x0037) },
221 /* SoundGraph iMON OEM LCD (IR & LCD) */
222 { USB_DEVICE(0x15c2, 0x0038) },
223 /* SoundGraph iMON UltraBay (IR & LCD) */
224 { USB_DEVICE(0x15c2, 0x0039) },
225 /* device specifics unknown */
226 { USB_DEVICE(0x15c2, 0x003a) },
227 /* device specifics unknown */
228 { USB_DEVICE(0x15c2, 0x003b) },
229 /* SoundGraph iMON OEM Inside (IR only) */
230 { USB_DEVICE(0x15c2, 0x003c) },
231 /* device specifics unknown */
232 { USB_DEVICE(0x15c2, 0x003d) },
233 /* device specifics unknown */
234 { USB_DEVICE(0x15c2, 0x003e) },
235 /* device specifics unknown */
236 { USB_DEVICE(0x15c2, 0x003f) },
237 /* device specifics unknown */
238 { USB_DEVICE(0x15c2, 0x0040) },
239 /* SoundGraph iMON MINI (IR only) */
240 { USB_DEVICE(0x15c2, 0x0041) },
241 /* Antec Veris Multimedia Station EZ External (IR only) */
242 { USB_DEVICE(0x15c2, 0x0042) },
243 /* Antec Veris Multimedia Station Basic Internal (IR only) */
244 { USB_DEVICE(0x15c2, 0x0043) },
245 /* Antec Veris Multimedia Station Elite (IR & VFD) */
246 { USB_DEVICE(0x15c2, 0x0044) },
247 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
248 { USB_DEVICE(0x15c2, 0x0045) },
249 /* device specifics unknown */
250 { USB_DEVICE(0x15c2, 0x0046) },
251 {}
252 };
253
254 /* USB Device data */
255 static struct usb_driver imon_driver = {
256 .name = MOD_NAME,
257 .probe = imon_probe,
258 .disconnect = __devexit_p(imon_disconnect),
259 .suspend = imon_suspend,
260 .resume = imon_resume,
261 .id_table = imon_usb_id_table,
262 };
263
264 static struct usb_class_driver imon_vfd_class = {
265 .name = DEVICE_NAME,
266 .fops = &vfd_fops,
267 .minor_base = DISPLAY_MINOR_BASE,
268 };
269
270 static struct usb_class_driver imon_lcd_class = {
271 .name = DEVICE_NAME,
272 .fops = &lcd_fops,
273 .minor_base = DISPLAY_MINOR_BASE,
274 };
275
276 /* imon receiver front panel/knob key table */
277 static const struct {
278 u64 hw_code;
279 u32 keycode;
280 } imon_panel_key_table[] = {
281 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
282 { 0x000000001200ffeell, KEY_UP },
283 { 0x000000001300ffeell, KEY_DOWN },
284 { 0x000000001400ffeell, KEY_LEFT },
285 { 0x000000001500ffeell, KEY_RIGHT },
286 { 0x000000001600ffeell, KEY_ENTER },
287 { 0x000000001700ffeell, KEY_ESC },
288 { 0x000000001f00ffeell, KEY_AUDIO },
289 { 0x000000002000ffeell, KEY_VIDEO },
290 { 0x000000002100ffeell, KEY_CAMERA },
291 { 0x000000002700ffeell, KEY_DVD },
292 { 0x000000002300ffeell, KEY_TV },
293 { 0x000000002b00ffeell, KEY_EXIT },
294 { 0x000000002c00ffeell, KEY_SELECT },
295 { 0x000000002d00ffeell, KEY_MENU },
296 { 0x000000000500ffeell, KEY_PREVIOUS },
297 { 0x000000000700ffeell, KEY_REWIND },
298 { 0x000000000400ffeell, KEY_STOP },
299 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
300 { 0x000000000800ffeell, KEY_FASTFORWARD },
301 { 0x000000000600ffeell, KEY_NEXT },
302 { 0x000000010000ffeell, KEY_RIGHT },
303 { 0x000001000000ffeell, KEY_LEFT },
304 { 0x000000003d00ffeell, KEY_SELECT },
305 { 0x000100000000ffeell, KEY_VOLUMEUP },
306 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
307 { 0x000000000100ffeell, KEY_MUTE },
308 /* 0xffdc iMON MCE VFD */
309 { 0x00010000ffffffeell, KEY_VOLUMEUP },
310 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
311 { 0x00000001ffffffeell, KEY_MUTE },
312 { 0x0000000fffffffeell, KEY_MEDIA },
313 { 0x00000012ffffffeell, KEY_UP },
314 { 0x00000013ffffffeell, KEY_DOWN },
315 { 0x00000014ffffffeell, KEY_LEFT },
316 { 0x00000015ffffffeell, KEY_RIGHT },
317 { 0x00000016ffffffeell, KEY_ENTER },
318 { 0x00000017ffffffeell, KEY_ESC },
319 /* iMON Knob values */
320 { 0x000100ffffffffeell, KEY_VOLUMEUP },
321 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
322 { 0x000008ffffffffeell, KEY_MUTE },
323 };
324
325 /* to prevent races between open() and disconnect(), probing, etc */
326 static DEFINE_MUTEX(driver_lock);
327
328 /* Module bookkeeping bits */
329 MODULE_AUTHOR(MOD_AUTHOR);
330 MODULE_DESCRIPTION(MOD_DESC);
331 MODULE_VERSION(MOD_VERSION);
332 MODULE_LICENSE("GPL");
333 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
334
335 static bool debug;
336 module_param(debug, bool, S_IRUGO | S_IWUSR);
337 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
338
339 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
340 static int display_type;
341 module_param(display_type, int, S_IRUGO);
342 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
343 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
344
345 static int pad_stabilize = 1;
346 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
347 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
348 "presses in arrow key mode. 0=disable, 1=enable (default).");
349
350 /*
351 * In certain use cases, mouse mode isn't really helpful, and could actually
352 * cause confusion, so allow disabling it when the IR device is open.
353 */
354 static bool nomouse;
355 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
356 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
357 "open. 0=don't disable, 1=disable. (default: don't disable)");
358
359 /* threshold at which a pad push registers as an arrow key in kbd mode */
360 static int pad_thresh;
361 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
362 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
363 "arrow key in kbd mode (default: 28)");
364
365
366 static void free_imon_context(struct imon_context *ictx)
367 {
368 struct device *dev = ictx->dev;
369
370 usb_free_urb(ictx->tx_urb);
371 usb_free_urb(ictx->rx_urb_intf0);
372 usb_free_urb(ictx->rx_urb_intf1);
373 kfree(ictx);
374
375 dev_dbg(dev, "%s: iMON context freed\n", __func__);
376 }
377
378 /**
379 * Called when the Display device (e.g. /dev/lcd0)
380 * is opened by the application.
381 */
382 static int display_open(struct inode *inode, struct file *file)
383 {
384 struct usb_interface *interface;
385 struct imon_context *ictx = NULL;
386 int subminor;
387 int retval = 0;
388
389 /* prevent races with disconnect */
390 mutex_lock(&driver_lock);
391
392 subminor = iminor(inode);
393 interface = usb_find_interface(&imon_driver, subminor);
394 if (!interface) {
395 pr_err("could not find interface for minor %d\n", subminor);
396 retval = -ENODEV;
397 goto exit;
398 }
399 ictx = usb_get_intfdata(interface);
400
401 if (!ictx) {
402 pr_err("no context found for minor %d\n", subminor);
403 retval = -ENODEV;
404 goto exit;
405 }
406
407 mutex_lock(&ictx->lock);
408
409 if (!ictx->display_supported) {
410 pr_err("display not supported by device\n");
411 retval = -ENODEV;
412 } else if (ictx->display_isopen) {
413 pr_err("display port is already open\n");
414 retval = -EBUSY;
415 } else {
416 ictx->display_isopen = true;
417 file->private_data = ictx;
418 dev_dbg(ictx->dev, "display port opened\n");
419 }
420
421 mutex_unlock(&ictx->lock);
422
423 exit:
424 mutex_unlock(&driver_lock);
425 return retval;
426 }
427
428 /**
429 * Called when the display device (e.g. /dev/lcd0)
430 * is closed by the application.
431 */
432 static int display_close(struct inode *inode, struct file *file)
433 {
434 struct imon_context *ictx = NULL;
435 int retval = 0;
436
437 ictx = file->private_data;
438
439 if (!ictx) {
440 pr_err("no context for device\n");
441 return -ENODEV;
442 }
443
444 mutex_lock(&ictx->lock);
445
446 if (!ictx->display_supported) {
447 pr_err("display not supported by device\n");
448 retval = -ENODEV;
449 } else if (!ictx->display_isopen) {
450 pr_err("display is not open\n");
451 retval = -EIO;
452 } else {
453 ictx->display_isopen = false;
454 dev_dbg(ictx->dev, "display port closed\n");
455 }
456
457 mutex_unlock(&ictx->lock);
458 return retval;
459 }
460
461 /**
462 * Sends a packet to the device -- this function must be called with
463 * ictx->lock held, or its unlock/lock sequence while waiting for tx
464 * to complete can/will lead to a deadlock.
465 */
466 static int send_packet(struct imon_context *ictx)
467 {
468 unsigned int pipe;
469 unsigned long timeout;
470 int interval = 0;
471 int retval = 0;
472 struct usb_ctrlrequest *control_req = NULL;
473
474 /* Check if we need to use control or interrupt urb */
475 if (!ictx->tx_control) {
476 pipe = usb_sndintpipe(ictx->usbdev_intf0,
477 ictx->tx_endpoint->bEndpointAddress);
478 interval = ictx->tx_endpoint->bInterval;
479
480 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
481 ictx->usb_tx_buf,
482 sizeof(ictx->usb_tx_buf),
483 usb_tx_callback, ictx, interval);
484
485 ictx->tx_urb->actual_length = 0;
486 } else {
487 /* fill request into kmalloc'ed space: */
488 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
489 GFP_KERNEL);
490 if (control_req == NULL)
491 return -ENOMEM;
492
493 /* setup packet is '21 09 0200 0001 0008' */
494 control_req->bRequestType = 0x21;
495 control_req->bRequest = 0x09;
496 control_req->wValue = cpu_to_le16(0x0200);
497 control_req->wIndex = cpu_to_le16(0x0001);
498 control_req->wLength = cpu_to_le16(0x0008);
499
500 /* control pipe is endpoint 0x00 */
501 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
502
503 /* build the control urb */
504 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
505 pipe, (unsigned char *)control_req,
506 ictx->usb_tx_buf,
507 sizeof(ictx->usb_tx_buf),
508 usb_tx_callback, ictx);
509 ictx->tx_urb->actual_length = 0;
510 }
511
512 init_completion(&ictx->tx.finished);
513 ictx->tx.busy = true;
514 smp_rmb(); /* ensure later readers know we're busy */
515
516 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
517 if (retval) {
518 ictx->tx.busy = false;
519 smp_rmb(); /* ensure later readers know we're not busy */
520 pr_err_ratelimited("error submitting urb(%d)\n", retval);
521 } else {
522 /* Wait for transmission to complete (or abort) */
523 mutex_unlock(&ictx->lock);
524 retval = wait_for_completion_interruptible(
525 &ictx->tx.finished);
526 if (retval)
527 pr_err_ratelimited("task interrupted\n");
528 mutex_lock(&ictx->lock);
529
530 retval = ictx->tx.status;
531 if (retval)
532 pr_err_ratelimited("packet tx failed (%d)\n", retval);
533 }
534
535 kfree(control_req);
536
537 /*
538 * Induce a mandatory 5ms delay before returning, as otherwise,
539 * send_packet can get called so rapidly as to overwhelm the device,
540 * particularly on faster systems and/or those with quirky usb.
541 */
542 timeout = msecs_to_jiffies(5);
543 set_current_state(TASK_UNINTERRUPTIBLE);
544 schedule_timeout(timeout);
545
546 return retval;
547 }
548
549 /**
550 * Sends an associate packet to the iMON 2.4G.
551 *
552 * This might not be such a good idea, since it has an id collision with
553 * some versions of the "IR & VFD" combo. The only way to determine if it
554 * is an RF version is to look at the product description string. (Which
555 * we currently do not fetch).
556 */
557 static int send_associate_24g(struct imon_context *ictx)
558 {
559 int retval;
560 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
561 0x00, 0x00, 0x00, 0x20 };
562
563 if (!ictx) {
564 pr_err("no context for device\n");
565 return -ENODEV;
566 }
567
568 if (!ictx->dev_present_intf0) {
569 pr_err("no iMON device present\n");
570 return -ENODEV;
571 }
572
573 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
574 retval = send_packet(ictx);
575
576 return retval;
577 }
578
579 /**
580 * Sends packets to setup and show clock on iMON display
581 *
582 * Arguments: year - last 2 digits of year, month - 1..12,
583 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
584 * hour - 0..23, minute - 0..59, second - 0..59
585 */
586 static int send_set_imon_clock(struct imon_context *ictx,
587 unsigned int year, unsigned int month,
588 unsigned int day, unsigned int dow,
589 unsigned int hour, unsigned int minute,
590 unsigned int second)
591 {
592 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
593 int retval = 0;
594 int i;
595
596 if (!ictx) {
597 pr_err("no context for device\n");
598 return -ENODEV;
599 }
600
601 switch (ictx->display_type) {
602 case IMON_DISPLAY_TYPE_LCD:
603 clock_enable_pkt[0][0] = 0x80;
604 clock_enable_pkt[0][1] = year;
605 clock_enable_pkt[0][2] = month-1;
606 clock_enable_pkt[0][3] = day;
607 clock_enable_pkt[0][4] = hour;
608 clock_enable_pkt[0][5] = minute;
609 clock_enable_pkt[0][6] = second;
610
611 clock_enable_pkt[1][0] = 0x80;
612 clock_enable_pkt[1][1] = 0;
613 clock_enable_pkt[1][2] = 0;
614 clock_enable_pkt[1][3] = 0;
615 clock_enable_pkt[1][4] = 0;
616 clock_enable_pkt[1][5] = 0;
617 clock_enable_pkt[1][6] = 0;
618
619 if (ictx->product == 0xffdc) {
620 clock_enable_pkt[0][7] = 0x50;
621 clock_enable_pkt[1][7] = 0x51;
622 } else {
623 clock_enable_pkt[0][7] = 0x88;
624 clock_enable_pkt[1][7] = 0x8a;
625 }
626
627 break;
628
629 case IMON_DISPLAY_TYPE_VFD:
630 clock_enable_pkt[0][0] = year;
631 clock_enable_pkt[0][1] = month-1;
632 clock_enable_pkt[0][2] = day;
633 clock_enable_pkt[0][3] = dow;
634 clock_enable_pkt[0][4] = hour;
635 clock_enable_pkt[0][5] = minute;
636 clock_enable_pkt[0][6] = second;
637 clock_enable_pkt[0][7] = 0x40;
638
639 clock_enable_pkt[1][0] = 0;
640 clock_enable_pkt[1][1] = 0;
641 clock_enable_pkt[1][2] = 1;
642 clock_enable_pkt[1][3] = 0;
643 clock_enable_pkt[1][4] = 0;
644 clock_enable_pkt[1][5] = 0;
645 clock_enable_pkt[1][6] = 0;
646 clock_enable_pkt[1][7] = 0x42;
647
648 break;
649
650 default:
651 return -ENODEV;
652 }
653
654 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
655 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
656 retval = send_packet(ictx);
657 if (retval) {
658 pr_err("send_packet failed for packet %d\n", i);
659 break;
660 }
661 }
662
663 return retval;
664 }
665
666 /**
667 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
668 */
669 static ssize_t show_associate_remote(struct device *d,
670 struct device_attribute *attr,
671 char *buf)
672 {
673 struct imon_context *ictx = dev_get_drvdata(d);
674
675 if (!ictx)
676 return -ENODEV;
677
678 mutex_lock(&ictx->lock);
679 if (ictx->rf_isassociating)
680 strcpy(buf, "associating\n");
681 else
682 strcpy(buf, "closed\n");
683
684 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
685 "instructions on how to associate your iMON 2.4G DT/LT "
686 "remote\n");
687 mutex_unlock(&ictx->lock);
688 return strlen(buf);
689 }
690
691 static ssize_t store_associate_remote(struct device *d,
692 struct device_attribute *attr,
693 const char *buf, size_t count)
694 {
695 struct imon_context *ictx;
696
697 ictx = dev_get_drvdata(d);
698
699 if (!ictx)
700 return -ENODEV;
701
702 mutex_lock(&ictx->lock);
703 ictx->rf_isassociating = true;
704 send_associate_24g(ictx);
705 mutex_unlock(&ictx->lock);
706
707 return count;
708 }
709
710 /**
711 * sysfs functions to control internal imon clock
712 */
713 static ssize_t show_imon_clock(struct device *d,
714 struct device_attribute *attr, char *buf)
715 {
716 struct imon_context *ictx = dev_get_drvdata(d);
717 size_t len;
718
719 if (!ictx)
720 return -ENODEV;
721
722 mutex_lock(&ictx->lock);
723
724 if (!ictx->display_supported) {
725 len = snprintf(buf, PAGE_SIZE, "Not supported.");
726 } else {
727 len = snprintf(buf, PAGE_SIZE,
728 "To set the clock on your iMON display:\n"
729 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
730 "%s", ictx->display_isopen ?
731 "\nNOTE: imon device must be closed\n" : "");
732 }
733
734 mutex_unlock(&ictx->lock);
735
736 return len;
737 }
738
739 static ssize_t store_imon_clock(struct device *d,
740 struct device_attribute *attr,
741 const char *buf, size_t count)
742 {
743 struct imon_context *ictx = dev_get_drvdata(d);
744 ssize_t retval;
745 unsigned int year, month, day, dow, hour, minute, second;
746
747 if (!ictx)
748 return -ENODEV;
749
750 mutex_lock(&ictx->lock);
751
752 if (!ictx->display_supported) {
753 retval = -ENODEV;
754 goto exit;
755 } else if (ictx->display_isopen) {
756 retval = -EBUSY;
757 goto exit;
758 }
759
760 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
761 &hour, &minute, &second) != 7) {
762 retval = -EINVAL;
763 goto exit;
764 }
765
766 if ((month < 1 || month > 12) ||
767 (day < 1 || day > 31) || (dow > 6) ||
768 (hour > 23) || (minute > 59) || (second > 59)) {
769 retval = -EINVAL;
770 goto exit;
771 }
772
773 retval = send_set_imon_clock(ictx, year, month, day, dow,
774 hour, minute, second);
775 if (retval)
776 goto exit;
777
778 retval = count;
779 exit:
780 mutex_unlock(&ictx->lock);
781
782 return retval;
783 }
784
785
786 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
787 store_imon_clock);
788
789 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
790 store_associate_remote);
791
792 static struct attribute *imon_display_sysfs_entries[] = {
793 &dev_attr_imon_clock.attr,
794 NULL
795 };
796
797 static struct attribute_group imon_display_attr_group = {
798 .attrs = imon_display_sysfs_entries
799 };
800
801 static struct attribute *imon_rf_sysfs_entries[] = {
802 &dev_attr_associate_remote.attr,
803 NULL
804 };
805
806 static struct attribute_group imon_rf_attr_group = {
807 .attrs = imon_rf_sysfs_entries
808 };
809
810 /**
811 * Writes data to the VFD. The iMON VFD is 2x16 characters
812 * and requires data in 5 consecutive USB interrupt packets,
813 * each packet but the last carrying 7 bytes.
814 *
815 * I don't know if the VFD board supports features such as
816 * scrolling, clearing rows, blanking, etc. so at
817 * the caller must provide a full screen of data. If fewer
818 * than 32 bytes are provided spaces will be appended to
819 * generate a full screen.
820 */
821 static ssize_t vfd_write(struct file *file, const char *buf,
822 size_t n_bytes, loff_t *pos)
823 {
824 int i;
825 int offset;
826 int seq;
827 int retval = 0;
828 struct imon_context *ictx;
829 const unsigned char vfd_packet6[] = {
830 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
831
832 ictx = file->private_data;
833 if (!ictx) {
834 pr_err_ratelimited("no context for device\n");
835 return -ENODEV;
836 }
837
838 mutex_lock(&ictx->lock);
839
840 if (!ictx->dev_present_intf0) {
841 pr_err_ratelimited("no iMON device present\n");
842 retval = -ENODEV;
843 goto exit;
844 }
845
846 if (n_bytes <= 0 || n_bytes > 32) {
847 pr_err_ratelimited("invalid payload size\n");
848 retval = -EINVAL;
849 goto exit;
850 }
851
852 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
853 retval = -EFAULT;
854 goto exit;
855 }
856
857 /* Pad with spaces */
858 for (i = n_bytes; i < 32; ++i)
859 ictx->tx.data_buf[i] = ' ';
860
861 for (i = 32; i < 35; ++i)
862 ictx->tx.data_buf[i] = 0xFF;
863
864 offset = 0;
865 seq = 0;
866
867 do {
868 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
869 ictx->usb_tx_buf[7] = (unsigned char) seq;
870
871 retval = send_packet(ictx);
872 if (retval) {
873 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
874 goto exit;
875 } else {
876 seq += 2;
877 offset += 7;
878 }
879
880 } while (offset < 35);
881
882 /* Send packet #6 */
883 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
884 ictx->usb_tx_buf[7] = (unsigned char) seq;
885 retval = send_packet(ictx);
886 if (retval)
887 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
888
889 exit:
890 mutex_unlock(&ictx->lock);
891
892 return (!retval) ? n_bytes : retval;
893 }
894
895 /**
896 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
897 * packets. We accept data as 16 hexadecimal digits, followed by a
898 * newline (to make it easy to drive the device from a command-line
899 * -- even though the actual binary data is a bit complicated).
900 *
901 * The device itself is not a "traditional" text-mode display. It's
902 * actually a 16x96 pixel bitmap display. That means if you want to
903 * display text, you've got to have your own "font" and translate the
904 * text into bitmaps for display. This is really flexible (you can
905 * display whatever diacritics you need, and so on), but it's also
906 * a lot more complicated than most LCDs...
907 */
908 static ssize_t lcd_write(struct file *file, const char *buf,
909 size_t n_bytes, loff_t *pos)
910 {
911 int retval = 0;
912 struct imon_context *ictx;
913
914 ictx = file->private_data;
915 if (!ictx) {
916 pr_err_ratelimited("no context for device\n");
917 return -ENODEV;
918 }
919
920 mutex_lock(&ictx->lock);
921
922 if (!ictx->display_supported) {
923 pr_err_ratelimited("no iMON display present\n");
924 retval = -ENODEV;
925 goto exit;
926 }
927
928 if (n_bytes != 8) {
929 pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
930 (int)n_bytes);
931 retval = -EINVAL;
932 goto exit;
933 }
934
935 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
936 retval = -EFAULT;
937 goto exit;
938 }
939
940 retval = send_packet(ictx);
941 if (retval) {
942 pr_err_ratelimited("send packet failed!\n");
943 goto exit;
944 } else {
945 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
946 __func__, (int) n_bytes);
947 }
948 exit:
949 mutex_unlock(&ictx->lock);
950 return (!retval) ? n_bytes : retval;
951 }
952
953 /**
954 * Callback function for USB core API: transmit data
955 */
956 static void usb_tx_callback(struct urb *urb)
957 {
958 struct imon_context *ictx;
959
960 if (!urb)
961 return;
962 ictx = (struct imon_context *)urb->context;
963 if (!ictx)
964 return;
965
966 ictx->tx.status = urb->status;
967
968 /* notify waiters that write has finished */
969 ictx->tx.busy = false;
970 smp_rmb(); /* ensure later readers know we're not busy */
971 complete(&ictx->tx.finished);
972 }
973
974 /**
975 * report touchscreen input
976 */
977 static void imon_touch_display_timeout(unsigned long data)
978 {
979 struct imon_context *ictx = (struct imon_context *)data;
980
981 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
982 return;
983
984 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
985 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
986 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
987 input_sync(ictx->touch);
988 }
989
990 /**
991 * iMON IR receivers support two different signal sets -- those used by
992 * the iMON remotes, and those used by the Windows MCE remotes (which is
993 * really just RC-6), but only one or the other at a time, as the signals
994 * are decoded onboard the receiver.
995 *
996 * This function gets called two different ways, one way is from
997 * rc_register_device, for initial protocol selection/setup, and the other is
998 * via a userspace-initiated protocol change request, either by direct sysfs
999 * prodding or by something like ir-keytable. In the rc_register_device case,
1000 * the imon context lock is already held, but when initiated from userspace,
1001 * it is not, so we must acquire it prior to calling send_packet, which
1002 * requires that the lock is held.
1003 */
1004 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_type)
1005 {
1006 int retval;
1007 struct imon_context *ictx = rc->priv;
1008 struct device *dev = ictx->dev;
1009 bool unlock = false;
1010 unsigned char ir_proto_packet[] = {
1011 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1012
1013 if (*rc_type && !(*rc_type & rc->allowed_protos))
1014 dev_warn(dev, "Looks like you're trying to use an IR protocol "
1015 "this device does not support\n");
1016
1017 if (*rc_type & RC_BIT_RC6_MCE) {
1018 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1019 ir_proto_packet[0] = 0x01;
1020 *rc_type = RC_BIT_RC6_MCE;
1021 } else if (*rc_type & RC_BIT_OTHER) {
1022 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1023 if (!pad_stabilize)
1024 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1025 /* ir_proto_packet[0] = 0x00; // already the default */
1026 *rc_type = RC_BIT_OTHER;
1027 } else {
1028 dev_warn(dev, "Unsupported IR protocol specified, overriding "
1029 "to iMON IR protocol\n");
1030 if (!pad_stabilize)
1031 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1032 /* ir_proto_packet[0] = 0x00; // already the default */
1033 *rc_type = RC_BIT_OTHER;
1034 }
1035
1036 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1037
1038 if (!mutex_is_locked(&ictx->lock)) {
1039 unlock = true;
1040 mutex_lock(&ictx->lock);
1041 }
1042
1043 retval = send_packet(ictx);
1044 if (retval)
1045 goto out;
1046
1047 ictx->rc_type = *rc_type;
1048 ictx->pad_mouse = false;
1049
1050 out:
1051 if (unlock)
1052 mutex_unlock(&ictx->lock);
1053
1054 return retval;
1055 }
1056
1057 static inline int tv2int(const struct timeval *a, const struct timeval *b)
1058 {
1059 int usecs = 0;
1060 int sec = 0;
1061
1062 if (b->tv_usec > a->tv_usec) {
1063 usecs = 1000000;
1064 sec--;
1065 }
1066
1067 usecs += a->tv_usec - b->tv_usec;
1068
1069 sec += a->tv_sec - b->tv_sec;
1070 sec *= 1000;
1071 usecs /= 1000;
1072 sec += usecs;
1073
1074 if (sec < 0)
1075 sec = 1000;
1076
1077 return sec;
1078 }
1079
1080 /**
1081 * The directional pad behaves a bit differently, depending on whether this is
1082 * one of the older ffdc devices or a newer device. Newer devices appear to
1083 * have a higher resolution matrix for more precise mouse movement, but it
1084 * makes things overly sensitive in keyboard mode, so we do some interesting
1085 * contortions to make it less touchy. Older devices run through the same
1086 * routine with shorter timeout and a smaller threshold.
1087 */
1088 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1089 {
1090 struct timeval ct;
1091 static struct timeval prev_time = {0, 0};
1092 static struct timeval hit_time = {0, 0};
1093 static int x, y, prev_result, hits;
1094 int result = 0;
1095 int msec, msec_hit;
1096
1097 do_gettimeofday(&ct);
1098 msec = tv2int(&ct, &prev_time);
1099 msec_hit = tv2int(&ct, &hit_time);
1100
1101 if (msec > 100) {
1102 x = 0;
1103 y = 0;
1104 hits = 0;
1105 }
1106
1107 x += a;
1108 y += b;
1109
1110 prev_time = ct;
1111
1112 if (abs(x) > threshold || abs(y) > threshold) {
1113 if (abs(y) > abs(x))
1114 result = (y > 0) ? 0x7F : 0x80;
1115 else
1116 result = (x > 0) ? 0x7F00 : 0x8000;
1117
1118 x = 0;
1119 y = 0;
1120
1121 if (result == prev_result) {
1122 hits++;
1123
1124 if (hits > 3) {
1125 switch (result) {
1126 case 0x7F:
1127 y = 17 * threshold / 30;
1128 break;
1129 case 0x80:
1130 y -= 17 * threshold / 30;
1131 break;
1132 case 0x7F00:
1133 x = 17 * threshold / 30;
1134 break;
1135 case 0x8000:
1136 x -= 17 * threshold / 30;
1137 break;
1138 }
1139 }
1140
1141 if (hits == 2 && msec_hit < timeout) {
1142 result = 0;
1143 hits = 1;
1144 }
1145 } else {
1146 prev_result = result;
1147 hits = 1;
1148 hit_time = ct;
1149 }
1150 }
1151
1152 return result;
1153 }
1154
1155 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1156 {
1157 u32 keycode;
1158 u32 release;
1159 bool is_release_code = false;
1160
1161 /* Look for the initial press of a button */
1162 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1163 ictx->rc_toggle = 0x0;
1164 ictx->rc_scancode = scancode;
1165
1166 /* Look for the release of a button */
1167 if (keycode == KEY_RESERVED) {
1168 release = scancode & ~0x4000;
1169 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1170 if (keycode != KEY_RESERVED)
1171 is_release_code = true;
1172 }
1173
1174 ictx->release_code = is_release_code;
1175
1176 return keycode;
1177 }
1178
1179 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1180 {
1181 u32 keycode;
1182
1183 #define MCE_KEY_MASK 0x7000
1184 #define MCE_TOGGLE_BIT 0x8000
1185
1186 /*
1187 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1188 * (the toggle bit flipping between alternating key presses), while
1189 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1190 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1191 * but we can't or them into all codes, as some keys are decoded in
1192 * a different way w/o the same use of the toggle bit...
1193 */
1194 if (scancode & 0x80000000)
1195 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1196
1197 ictx->rc_scancode = scancode;
1198 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1199
1200 /* not used in mce mode, but make sure we know its false */
1201 ictx->release_code = false;
1202
1203 return keycode;
1204 }
1205
1206 static u32 imon_panel_key_lookup(u64 code)
1207 {
1208 int i;
1209 u32 keycode = KEY_RESERVED;
1210
1211 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1212 if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
1213 keycode = imon_panel_key_table[i].keycode;
1214 break;
1215 }
1216 }
1217
1218 return keycode;
1219 }
1220
1221 static bool imon_mouse_event(struct imon_context *ictx,
1222 unsigned char *buf, int len)
1223 {
1224 char rel_x = 0x00, rel_y = 0x00;
1225 u8 right_shift = 1;
1226 bool mouse_input = true;
1227 int dir = 0;
1228 unsigned long flags;
1229
1230 spin_lock_irqsave(&ictx->kc_lock, flags);
1231
1232 /* newer iMON device PAD or mouse button */
1233 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1234 rel_x = buf[2];
1235 rel_y = buf[3];
1236 right_shift = 1;
1237 /* 0xffdc iMON PAD or mouse button input */
1238 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1239 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1240 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1241 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1242 if (buf[0] & 0x02)
1243 rel_x |= ~0x0f;
1244 rel_x = rel_x + rel_x / 2;
1245 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1246 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1247 if (buf[0] & 0x01)
1248 rel_y |= ~0x0f;
1249 rel_y = rel_y + rel_y / 2;
1250 right_shift = 2;
1251 /* some ffdc devices decode mouse buttons differently... */
1252 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1253 right_shift = 2;
1254 /* ch+/- buttons, which we use for an emulated scroll wheel */
1255 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1256 dir = 1;
1257 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1258 dir = -1;
1259 } else
1260 mouse_input = false;
1261
1262 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1263
1264 if (mouse_input) {
1265 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1266
1267 if (dir) {
1268 input_report_rel(ictx->idev, REL_WHEEL, dir);
1269 } else if (rel_x || rel_y) {
1270 input_report_rel(ictx->idev, REL_X, rel_x);
1271 input_report_rel(ictx->idev, REL_Y, rel_y);
1272 } else {
1273 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1274 input_report_key(ictx->idev, BTN_RIGHT,
1275 buf[1] >> right_shift & 0x1);
1276 }
1277 input_sync(ictx->idev);
1278 spin_lock_irqsave(&ictx->kc_lock, flags);
1279 ictx->last_keycode = ictx->kc;
1280 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1281 }
1282
1283 return mouse_input;
1284 }
1285
1286 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1287 {
1288 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1289 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1290 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1291 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1292 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1293 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1294 input_sync(ictx->touch);
1295 }
1296
1297 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1298 {
1299 int dir = 0;
1300 char rel_x = 0x00, rel_y = 0x00;
1301 u16 timeout, threshold;
1302 u32 scancode = KEY_RESERVED;
1303 unsigned long flags;
1304
1305 /*
1306 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1307 * contain a position coordinate (x,y), with each component ranging
1308 * from -14 to 14. We want to down-sample this to only 4 discrete values
1309 * for up/down/left/right arrow keys. Also, when you get too close to
1310 * diagonals, it has a tendency to jump back and forth, so lets try to
1311 * ignore when they get too close.
1312 */
1313 if (ictx->product != 0xffdc) {
1314 /* first, pad to 8 bytes so it conforms with everything else */
1315 buf[5] = buf[6] = buf[7] = 0;
1316 timeout = 500; /* in msecs */
1317 /* (2*threshold) x (2*threshold) square */
1318 threshold = pad_thresh ? pad_thresh : 28;
1319 rel_x = buf[2];
1320 rel_y = buf[3];
1321
1322 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) {
1323 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1324 dir = stabilize((int)rel_x, (int)rel_y,
1325 timeout, threshold);
1326 if (!dir) {
1327 spin_lock_irqsave(&ictx->kc_lock,
1328 flags);
1329 ictx->kc = KEY_UNKNOWN;
1330 spin_unlock_irqrestore(&ictx->kc_lock,
1331 flags);
1332 return;
1333 }
1334 buf[2] = dir & 0xFF;
1335 buf[3] = (dir >> 8) & 0xFF;
1336 scancode = be32_to_cpu(*((u32 *)buf));
1337 }
1338 } else {
1339 /*
1340 * Hack alert: instead of using keycodes, we have
1341 * to use hard-coded scancodes here...
1342 */
1343 if (abs(rel_y) > abs(rel_x)) {
1344 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1345 buf[3] = 0;
1346 if (rel_y > 0)
1347 scancode = 0x01007f00; /* KEY_DOWN */
1348 else
1349 scancode = 0x01008000; /* KEY_UP */
1350 } else {
1351 buf[2] = 0;
1352 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1353 if (rel_x > 0)
1354 scancode = 0x0100007f; /* KEY_RIGHT */
1355 else
1356 scancode = 0x01000080; /* KEY_LEFT */
1357 }
1358 }
1359
1360 /*
1361 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1362 * device (15c2:ffdc). The remote generates various codes from
1363 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1364 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1365 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1366 * reversed endianess. Extract direction from buffer, rotate endianess,
1367 * adjust sign and feed the values into stabilize(). The resulting codes
1368 * will be 0x01008000, 0x01007F00, which match the newer devices.
1369 */
1370 } else {
1371 timeout = 10; /* in msecs */
1372 /* (2*threshold) x (2*threshold) square */
1373 threshold = pad_thresh ? pad_thresh : 15;
1374
1375 /* buf[1] is x */
1376 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1377 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1378 if (buf[0] & 0x02)
1379 rel_x |= ~0x10+1;
1380 /* buf[2] is y */
1381 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1382 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1383 if (buf[0] & 0x01)
1384 rel_y |= ~0x10+1;
1385
1386 buf[0] = 0x01;
1387 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1388
1389 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) {
1390 dir = stabilize((int)rel_x, (int)rel_y,
1391 timeout, threshold);
1392 if (!dir) {
1393 spin_lock_irqsave(&ictx->kc_lock, flags);
1394 ictx->kc = KEY_UNKNOWN;
1395 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1396 return;
1397 }
1398 buf[2] = dir & 0xFF;
1399 buf[3] = (dir >> 8) & 0xFF;
1400 scancode = be32_to_cpu(*((u32 *)buf));
1401 } else {
1402 /*
1403 * Hack alert: instead of using keycodes, we have
1404 * to use hard-coded scancodes here...
1405 */
1406 if (abs(rel_y) > abs(rel_x)) {
1407 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1408 buf[3] = 0;
1409 if (rel_y > 0)
1410 scancode = 0x01007f00; /* KEY_DOWN */
1411 else
1412 scancode = 0x01008000; /* KEY_UP */
1413 } else {
1414 buf[2] = 0;
1415 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1416 if (rel_x > 0)
1417 scancode = 0x0100007f; /* KEY_RIGHT */
1418 else
1419 scancode = 0x01000080; /* KEY_LEFT */
1420 }
1421 }
1422 }
1423
1424 if (scancode) {
1425 spin_lock_irqsave(&ictx->kc_lock, flags);
1426 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1427 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1428 }
1429 }
1430
1431 /**
1432 * figure out if these is a press or a release. We don't actually
1433 * care about repeats, as those will be auto-generated within the IR
1434 * subsystem for repeating scancodes.
1435 */
1436 static int imon_parse_press_type(struct imon_context *ictx,
1437 unsigned char *buf, u8 ktype)
1438 {
1439 int press_type = 0;
1440 unsigned long flags;
1441
1442 spin_lock_irqsave(&ictx->kc_lock, flags);
1443
1444 /* key release of 0x02XXXXXX key */
1445 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1446 ictx->kc = ictx->last_keycode;
1447
1448 /* mouse button release on (some) 0xffdc devices */
1449 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1450 buf[2] == 0x81 && buf[3] == 0xb7)
1451 ictx->kc = ictx->last_keycode;
1452
1453 /* mouse button release on (some other) 0xffdc devices */
1454 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1455 buf[2] == 0x81 && buf[3] == 0xb7)
1456 ictx->kc = ictx->last_keycode;
1457
1458 /* mce-specific button handling, no keyup events */
1459 else if (ktype == IMON_KEY_MCE) {
1460 ictx->rc_toggle = buf[2];
1461 press_type = 1;
1462
1463 /* incoherent or irrelevant data */
1464 } else if (ictx->kc == KEY_RESERVED)
1465 press_type = -EINVAL;
1466
1467 /* key release of 0xXXXXXXb7 key */
1468 else if (ictx->release_code)
1469 press_type = 0;
1470
1471 /* this is a button press */
1472 else
1473 press_type = 1;
1474
1475 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1476
1477 return press_type;
1478 }
1479
1480 /**
1481 * Process the incoming packet
1482 */
1483 static void imon_incoming_packet(struct imon_context *ictx,
1484 struct urb *urb, int intf)
1485 {
1486 int len = urb->actual_length;
1487 unsigned char *buf = urb->transfer_buffer;
1488 struct device *dev = ictx->dev;
1489 unsigned long flags;
1490 u32 kc;
1491 int i;
1492 u64 scancode;
1493 int press_type = 0;
1494 int msec;
1495 struct timeval t;
1496 static struct timeval prev_time = { 0, 0 };
1497 u8 ktype;
1498
1499 /* filter out junk data on the older 0xffdc imon devices */
1500 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1501 return;
1502
1503 /* Figure out what key was pressed */
1504 if (len == 8 && buf[7] == 0xee) {
1505 scancode = be64_to_cpu(*((u64 *)buf));
1506 ktype = IMON_KEY_PANEL;
1507 kc = imon_panel_key_lookup(scancode);
1508 } else {
1509 scancode = be32_to_cpu(*((u32 *)buf));
1510 if (ictx->rc_type == RC_BIT_RC6_MCE) {
1511 ktype = IMON_KEY_IMON;
1512 if (buf[0] == 0x80)
1513 ktype = IMON_KEY_MCE;
1514 kc = imon_mce_key_lookup(ictx, scancode);
1515 } else {
1516 ktype = IMON_KEY_IMON;
1517 kc = imon_remote_key_lookup(ictx, scancode);
1518 }
1519 }
1520
1521 spin_lock_irqsave(&ictx->kc_lock, flags);
1522 /* keyboard/mouse mode toggle button */
1523 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1524 ictx->last_keycode = kc;
1525 if (!nomouse) {
1526 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1527 dev_dbg(dev, "toggling to %s mode\n",
1528 ictx->pad_mouse ? "mouse" : "keyboard");
1529 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1530 return;
1531 } else {
1532 ictx->pad_mouse = false;
1533 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1534 }
1535 }
1536
1537 ictx->kc = kc;
1538 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1539
1540 /* send touchscreen events through input subsystem if touchpad data */
1541 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1542 buf[7] == 0x86) {
1543 imon_touch_event(ictx, buf);
1544 return;
1545
1546 /* look for mouse events with pad in mouse mode */
1547 } else if (ictx->pad_mouse) {
1548 if (imon_mouse_event(ictx, buf, len))
1549 return;
1550 }
1551
1552 /* Now for some special handling to convert pad input to arrow keys */
1553 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1554 ((len == 8) && (buf[0] & 0x40) &&
1555 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1556 len = 8;
1557 imon_pad_to_keys(ictx, buf);
1558 }
1559
1560 if (debug) {
1561 printk(KERN_INFO "intf%d decoded packet: ", intf);
1562 for (i = 0; i < len; ++i)
1563 printk("%02x ", buf[i]);
1564 printk("\n");
1565 }
1566
1567 press_type = imon_parse_press_type(ictx, buf, ktype);
1568 if (press_type < 0)
1569 goto not_input_data;
1570
1571 spin_lock_irqsave(&ictx->kc_lock, flags);
1572 if (ictx->kc == KEY_UNKNOWN)
1573 goto unknown_key;
1574 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1575
1576 if (ktype != IMON_KEY_PANEL) {
1577 if (press_type == 0)
1578 rc_keyup(ictx->rdev);
1579 else {
1580 rc_keydown(ictx->rdev, ictx->rc_scancode, ictx->rc_toggle);
1581 spin_lock_irqsave(&ictx->kc_lock, flags);
1582 ictx->last_keycode = ictx->kc;
1583 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1584 }
1585 return;
1586 }
1587
1588 /* Only panel type events left to process now */
1589 spin_lock_irqsave(&ictx->kc_lock, flags);
1590
1591 do_gettimeofday(&t);
1592 /* KEY_MUTE repeats from knob need to be suppressed */
1593 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1594 msec = tv2int(&t, &prev_time);
1595 if (msec < ictx->idev->rep[REP_DELAY]) {
1596 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1597 return;
1598 }
1599 }
1600 prev_time = t;
1601 kc = ictx->kc;
1602
1603 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1604
1605 input_report_key(ictx->idev, kc, press_type);
1606 input_sync(ictx->idev);
1607
1608 /* panel keys don't generate a release */
1609 input_report_key(ictx->idev, kc, 0);
1610 input_sync(ictx->idev);
1611
1612 spin_lock_irqsave(&ictx->kc_lock, flags);
1613 ictx->last_keycode = kc;
1614 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1615
1616 return;
1617
1618 unknown_key:
1619 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1620 dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
1621 (long long)scancode);
1622 return;
1623
1624 not_input_data:
1625 if (len != 8) {
1626 dev_warn(dev, "imon %s: invalid incoming packet "
1627 "size (len = %d, intf%d)\n", __func__, len, intf);
1628 return;
1629 }
1630
1631 /* iMON 2.4G associate frame */
1632 if (buf[0] == 0x00 &&
1633 buf[2] == 0xFF && /* REFID */
1634 buf[3] == 0xFF &&
1635 buf[4] == 0xFF &&
1636 buf[5] == 0xFF && /* iMON 2.4G */
1637 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1638 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1639 dev_warn(dev, "%s: remote associated refid=%02X\n",
1640 __func__, buf[1]);
1641 ictx->rf_isassociating = false;
1642 }
1643 }
1644
1645 /**
1646 * Callback function for USB core API: receive data
1647 */
1648 static void usb_rx_callback_intf0(struct urb *urb)
1649 {
1650 struct imon_context *ictx;
1651 int intfnum = 0;
1652
1653 if (!urb)
1654 return;
1655
1656 ictx = (struct imon_context *)urb->context;
1657 if (!ictx)
1658 return;
1659
1660 /*
1661 * if we get a callback before we're done configuring the hardware, we
1662 * can't yet process the data, as there's nowhere to send it, but we
1663 * still need to submit a new rx URB to avoid wedging the hardware
1664 */
1665 if (!ictx->dev_present_intf0)
1666 goto out;
1667
1668 switch (urb->status) {
1669 case -ENOENT: /* usbcore unlink successful! */
1670 return;
1671
1672 case -ESHUTDOWN: /* transport endpoint was shut down */
1673 break;
1674
1675 case 0:
1676 imon_incoming_packet(ictx, urb, intfnum);
1677 break;
1678
1679 default:
1680 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1681 __func__, urb->status);
1682 break;
1683 }
1684
1685 out:
1686 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1687 }
1688
1689 static void usb_rx_callback_intf1(struct urb *urb)
1690 {
1691 struct imon_context *ictx;
1692 int intfnum = 1;
1693
1694 if (!urb)
1695 return;
1696
1697 ictx = (struct imon_context *)urb->context;
1698 if (!ictx)
1699 return;
1700
1701 /*
1702 * if we get a callback before we're done configuring the hardware, we
1703 * can't yet process the data, as there's nowhere to send it, but we
1704 * still need to submit a new rx URB to avoid wedging the hardware
1705 */
1706 if (!ictx->dev_present_intf1)
1707 goto out;
1708
1709 switch (urb->status) {
1710 case -ENOENT: /* usbcore unlink successful! */
1711 return;
1712
1713 case -ESHUTDOWN: /* transport endpoint was shut down */
1714 break;
1715
1716 case 0:
1717 imon_incoming_packet(ictx, urb, intfnum);
1718 break;
1719
1720 default:
1721 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1722 __func__, urb->status);
1723 break;
1724 }
1725
1726 out:
1727 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1728 }
1729
1730 /*
1731 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1732 * devices, and all of them constantly spew interrupts, even when there
1733 * is no actual data to report. However, byte 6 of this buffer looks like
1734 * its unique across device variants, so we're trying to key off that to
1735 * figure out which display type (if any) and what IR protocol the device
1736 * actually supports. These devices have their IR protocol hard-coded into
1737 * their firmware, they can't be changed on the fly like the newer hardware.
1738 */
1739 static void imon_get_ffdc_type(struct imon_context *ictx)
1740 {
1741 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1742 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1743 u64 allowed_protos = RC_BIT_OTHER;
1744
1745 switch (ffdc_cfg_byte) {
1746 /* iMON Knob, no display, iMON IR + vol knob */
1747 case 0x21:
1748 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1749 ictx->display_supported = false;
1750 break;
1751 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1752 case 0x4e:
1753 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1754 ictx->display_supported = false;
1755 ictx->rf_device = true;
1756 break;
1757 /* iMON VFD, no IR (does have vol knob tho) */
1758 case 0x35:
1759 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1760 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1761 break;
1762 /* iMON VFD, iMON IR */
1763 case 0x24:
1764 case 0x85:
1765 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1766 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1767 break;
1768 /* iMON VFD, MCE IR */
1769 case 0x46:
1770 case 0x7e:
1771 case 0x9e:
1772 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1773 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1774 allowed_protos = RC_BIT_RC6_MCE;
1775 break;
1776 /* iMON LCD, MCE IR */
1777 case 0x9f:
1778 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1779 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1780 allowed_protos = RC_BIT_RC6_MCE;
1781 break;
1782 default:
1783 dev_info(ictx->dev, "Unknown 0xffdc device, "
1784 "defaulting to VFD and iMON IR");
1785 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1786 /* We don't know which one it is, allow user to set the
1787 * RC6 one from userspace if OTHER wasn't correct. */
1788 allowed_protos |= RC_BIT_RC6_MCE;
1789 break;
1790 }
1791
1792 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1793
1794 ictx->display_type = detected_display_type;
1795 ictx->rc_type = allowed_protos;
1796 }
1797
1798 static void imon_set_display_type(struct imon_context *ictx)
1799 {
1800 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1801
1802 /*
1803 * Try to auto-detect the type of display if the user hasn't set
1804 * it by hand via the display_type modparam. Default is VFD.
1805 */
1806
1807 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1808 switch (ictx->product) {
1809 case 0xffdc:
1810 /* set in imon_get_ffdc_type() */
1811 configured_display_type = ictx->display_type;
1812 break;
1813 case 0x0034:
1814 case 0x0035:
1815 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1816 break;
1817 case 0x0038:
1818 case 0x0039:
1819 case 0x0045:
1820 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1821 break;
1822 case 0x003c:
1823 case 0x0041:
1824 case 0x0042:
1825 case 0x0043:
1826 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1827 ictx->display_supported = false;
1828 break;
1829 case 0x0036:
1830 case 0x0044:
1831 default:
1832 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1833 break;
1834 }
1835 } else {
1836 configured_display_type = display_type;
1837 if (display_type == IMON_DISPLAY_TYPE_NONE)
1838 ictx->display_supported = false;
1839 else
1840 ictx->display_supported = true;
1841 dev_info(ictx->dev, "%s: overriding display type to %d via "
1842 "modparam\n", __func__, display_type);
1843 }
1844
1845 ictx->display_type = configured_display_type;
1846 }
1847
1848 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1849 {
1850 struct rc_dev *rdev;
1851 int ret;
1852 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
1853 0x00, 0x00, 0x00, 0x88 };
1854
1855 rdev = rc_allocate_device();
1856 if (!rdev) {
1857 dev_err(ictx->dev, "remote control dev allocation failed\n");
1858 goto out;
1859 }
1860
1861 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1862 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1863 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1864 sizeof(ictx->phys_rdev));
1865 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1866
1867 rdev->input_name = ictx->name_rdev;
1868 rdev->input_phys = ictx->phys_rdev;
1869 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
1870 rdev->dev.parent = ictx->dev;
1871
1872 rdev->priv = ictx;
1873 rdev->driver_type = RC_DRIVER_SCANCODE;
1874 rdev->allowed_protos = RC_BIT_OTHER | RC_BIT_RC6_MCE; /* iMON PAD or MCE */
1875 rdev->change_protocol = imon_ir_change_protocol;
1876 rdev->driver_name = MOD_NAME;
1877
1878 /* Enable front-panel buttons and/or knobs */
1879 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1880 ret = send_packet(ictx);
1881 /* Not fatal, but warn about it */
1882 if (ret)
1883 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1884
1885 if (ictx->product == 0xffdc) {
1886 imon_get_ffdc_type(ictx);
1887 rdev->allowed_protos = ictx->rc_type;
1888 }
1889
1890 imon_set_display_type(ictx);
1891
1892 if (ictx->rc_type == RC_BIT_RC6_MCE)
1893 rdev->map_name = RC_MAP_IMON_MCE;
1894 else
1895 rdev->map_name = RC_MAP_IMON_PAD;
1896
1897 ret = rc_register_device(rdev);
1898 if (ret < 0) {
1899 dev_err(ictx->dev, "remote input dev register failed\n");
1900 goto out;
1901 }
1902
1903 return rdev;
1904
1905 out:
1906 rc_free_device(rdev);
1907 return NULL;
1908 }
1909
1910 static struct input_dev *imon_init_idev(struct imon_context *ictx)
1911 {
1912 struct input_dev *idev;
1913 int ret, i;
1914
1915 idev = input_allocate_device();
1916 if (!idev) {
1917 dev_err(ictx->dev, "input dev allocation failed\n");
1918 goto out;
1919 }
1920
1921 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1922 "iMON Panel, Knob and Mouse(%04x:%04x)",
1923 ictx->vendor, ictx->product);
1924 idev->name = ictx->name_idev;
1925
1926 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
1927 sizeof(ictx->phys_idev));
1928 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
1929 idev->phys = ictx->phys_idev;
1930
1931 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
1932
1933 idev->keybit[BIT_WORD(BTN_MOUSE)] =
1934 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1935 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
1936 BIT_MASK(REL_WHEEL);
1937
1938 /* panel and/or knob code support */
1939 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1940 u32 kc = imon_panel_key_table[i].keycode;
1941 __set_bit(kc, idev->keybit);
1942 }
1943
1944 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
1945 idev->dev.parent = ictx->dev;
1946 input_set_drvdata(idev, ictx);
1947
1948 ret = input_register_device(idev);
1949 if (ret < 0) {
1950 dev_err(ictx->dev, "input dev register failed\n");
1951 goto out;
1952 }
1953
1954 return idev;
1955
1956 out:
1957 input_free_device(idev);
1958 return NULL;
1959 }
1960
1961 static struct input_dev *imon_init_touch(struct imon_context *ictx)
1962 {
1963 struct input_dev *touch;
1964 int ret;
1965
1966 touch = input_allocate_device();
1967 if (!touch) {
1968 dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
1969 goto touch_alloc_failed;
1970 }
1971
1972 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
1973 "iMON USB Touchscreen (%04x:%04x)",
1974 ictx->vendor, ictx->product);
1975 touch->name = ictx->name_touch;
1976
1977 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
1978 sizeof(ictx->phys_touch));
1979 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
1980 touch->phys = ictx->phys_touch;
1981
1982 touch->evbit[0] =
1983 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1984 touch->keybit[BIT_WORD(BTN_TOUCH)] =
1985 BIT_MASK(BTN_TOUCH);
1986 input_set_abs_params(touch, ABS_X,
1987 0x00, 0xfff, 0, 0);
1988 input_set_abs_params(touch, ABS_Y,
1989 0x00, 0xfff, 0, 0);
1990
1991 input_set_drvdata(touch, ictx);
1992
1993 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
1994 touch->dev.parent = ictx->dev;
1995 ret = input_register_device(touch);
1996 if (ret < 0) {
1997 dev_info(ictx->dev, "touchscreen input dev register failed\n");
1998 goto touch_register_failed;
1999 }
2000
2001 return touch;
2002
2003 touch_register_failed:
2004 input_free_device(touch);
2005
2006 touch_alloc_failed:
2007 return NULL;
2008 }
2009
2010 static bool imon_find_endpoints(struct imon_context *ictx,
2011 struct usb_host_interface *iface_desc)
2012 {
2013 struct usb_endpoint_descriptor *ep;
2014 struct usb_endpoint_descriptor *rx_endpoint = NULL;
2015 struct usb_endpoint_descriptor *tx_endpoint = NULL;
2016 int ifnum = iface_desc->desc.bInterfaceNumber;
2017 int num_endpts = iface_desc->desc.bNumEndpoints;
2018 int i, ep_dir, ep_type;
2019 bool ir_ep_found = false;
2020 bool display_ep_found = false;
2021 bool tx_control = false;
2022
2023 /*
2024 * Scan the endpoint list and set:
2025 * first input endpoint = IR endpoint
2026 * first output endpoint = display endpoint
2027 */
2028 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2029 ep = &iface_desc->endpoint[i].desc;
2030 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2031 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
2032
2033 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2034 ep_type == USB_ENDPOINT_XFER_INT) {
2035
2036 rx_endpoint = ep;
2037 ir_ep_found = true;
2038 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2039
2040 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2041 ep_type == USB_ENDPOINT_XFER_INT) {
2042 tx_endpoint = ep;
2043 display_ep_found = true;
2044 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2045 }
2046 }
2047
2048 if (ifnum == 0) {
2049 ictx->rx_endpoint_intf0 = rx_endpoint;
2050 /*
2051 * tx is used to send characters to lcd/vfd, associate RF
2052 * remotes, set IR protocol, and maybe more...
2053 */
2054 ictx->tx_endpoint = tx_endpoint;
2055 } else {
2056 ictx->rx_endpoint_intf1 = rx_endpoint;
2057 }
2058
2059 /*
2060 * If we didn't find a display endpoint, this is probably one of the
2061 * newer iMON devices that use control urb instead of interrupt
2062 */
2063 if (!display_ep_found) {
2064 tx_control = true;
2065 display_ep_found = true;
2066 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
2067 "interface OUT endpoint\n", __func__);
2068 }
2069
2070 /*
2071 * Some iMON receivers have no display. Unfortunately, it seems
2072 * that SoundGraph recycles device IDs between devices both with
2073 * and without... :\
2074 */
2075 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2076 display_ep_found = false;
2077 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2078 }
2079
2080 /*
2081 * iMON Touch devices have a VGA touchscreen, but no "display", as
2082 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2083 */
2084 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2085 display_ep_found = false;
2086 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2087 }
2088
2089 /* Input endpoint is mandatory */
2090 if (!ir_ep_found)
2091 pr_err("no valid input (IR) endpoint found\n");
2092
2093 ictx->tx_control = tx_control;
2094
2095 if (display_ep_found)
2096 ictx->display_supported = true;
2097
2098 return ir_ep_found;
2099
2100 }
2101
2102 static struct imon_context *imon_init_intf0(struct usb_interface *intf)
2103 {
2104 struct imon_context *ictx;
2105 struct urb *rx_urb;
2106 struct urb *tx_urb;
2107 struct device *dev = &intf->dev;
2108 struct usb_host_interface *iface_desc;
2109 int ret = -ENOMEM;
2110
2111 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
2112 if (!ictx) {
2113 dev_err(dev, "%s: kzalloc failed for context", __func__);
2114 goto exit;
2115 }
2116 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2117 if (!rx_urb) {
2118 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
2119 goto rx_urb_alloc_failed;
2120 }
2121 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2122 if (!tx_urb) {
2123 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
2124 __func__);
2125 goto tx_urb_alloc_failed;
2126 }
2127
2128 mutex_init(&ictx->lock);
2129 spin_lock_init(&ictx->kc_lock);
2130
2131 mutex_lock(&ictx->lock);
2132
2133 ictx->dev = dev;
2134 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2135 ictx->rx_urb_intf0 = rx_urb;
2136 ictx->tx_urb = tx_urb;
2137 ictx->rf_device = false;
2138
2139 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2140 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2141
2142 ret = -ENODEV;
2143 iface_desc = intf->cur_altsetting;
2144 if (!imon_find_endpoints(ictx, iface_desc)) {
2145 goto find_endpoint_failed;
2146 }
2147
2148 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2149 usb_rcvintpipe(ictx->usbdev_intf0,
2150 ictx->rx_endpoint_intf0->bEndpointAddress),
2151 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2152 usb_rx_callback_intf0, ictx,
2153 ictx->rx_endpoint_intf0->bInterval);
2154
2155 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2156 if (ret) {
2157 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2158 goto urb_submit_failed;
2159 }
2160
2161 ictx->idev = imon_init_idev(ictx);
2162 if (!ictx->idev) {
2163 dev_err(dev, "%s: input device setup failed\n", __func__);
2164 goto idev_setup_failed;
2165 }
2166
2167 ictx->rdev = imon_init_rdev(ictx);
2168 if (!ictx->rdev) {
2169 dev_err(dev, "%s: rc device setup failed\n", __func__);
2170 goto rdev_setup_failed;
2171 }
2172
2173 ictx->dev_present_intf0 = true;
2174
2175 mutex_unlock(&ictx->lock);
2176 return ictx;
2177
2178 rdev_setup_failed:
2179 input_unregister_device(ictx->idev);
2180 idev_setup_failed:
2181 usb_kill_urb(ictx->rx_urb_intf0);
2182 urb_submit_failed:
2183 find_endpoint_failed:
2184 mutex_unlock(&ictx->lock);
2185 usb_free_urb(tx_urb);
2186 tx_urb_alloc_failed:
2187 usb_free_urb(rx_urb);
2188 rx_urb_alloc_failed:
2189 kfree(ictx);
2190 exit:
2191 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2192
2193 return NULL;
2194 }
2195
2196 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2197 struct imon_context *ictx)
2198 {
2199 struct urb *rx_urb;
2200 struct usb_host_interface *iface_desc;
2201 int ret = -ENOMEM;
2202
2203 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2204 if (!rx_urb) {
2205 pr_err("usb_alloc_urb failed for IR urb\n");
2206 goto rx_urb_alloc_failed;
2207 }
2208
2209 mutex_lock(&ictx->lock);
2210
2211 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2212 init_timer(&ictx->ttimer);
2213 ictx->ttimer.data = (unsigned long)ictx;
2214 ictx->ttimer.function = imon_touch_display_timeout;
2215 }
2216
2217 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2218 ictx->rx_urb_intf1 = rx_urb;
2219
2220 ret = -ENODEV;
2221 iface_desc = intf->cur_altsetting;
2222 if (!imon_find_endpoints(ictx, iface_desc))
2223 goto find_endpoint_failed;
2224
2225 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2226 ictx->touch = imon_init_touch(ictx);
2227 if (!ictx->touch)
2228 goto touch_setup_failed;
2229 } else
2230 ictx->touch = NULL;
2231
2232 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2233 usb_rcvintpipe(ictx->usbdev_intf1,
2234 ictx->rx_endpoint_intf1->bEndpointAddress),
2235 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2236 usb_rx_callback_intf1, ictx,
2237 ictx->rx_endpoint_intf1->bInterval);
2238
2239 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2240
2241 if (ret) {
2242 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2243 goto urb_submit_failed;
2244 }
2245
2246 ictx->dev_present_intf1 = true;
2247
2248 mutex_unlock(&ictx->lock);
2249 return ictx;
2250
2251 urb_submit_failed:
2252 if (ictx->touch)
2253 input_unregister_device(ictx->touch);
2254 touch_setup_failed:
2255 find_endpoint_failed:
2256 mutex_unlock(&ictx->lock);
2257 usb_free_urb(rx_urb);
2258 rx_urb_alloc_failed:
2259 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
2260
2261 return NULL;
2262 }
2263
2264 static void imon_init_display(struct imon_context *ictx,
2265 struct usb_interface *intf)
2266 {
2267 int ret;
2268
2269 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2270
2271 /* set up sysfs entry for built-in clock */
2272 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2273 if (ret)
2274 dev_err(ictx->dev, "Could not create display sysfs "
2275 "entries(%d)", ret);
2276
2277 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2278 ret = usb_register_dev(intf, &imon_lcd_class);
2279 else
2280 ret = usb_register_dev(intf, &imon_vfd_class);
2281 if (ret)
2282 /* Not a fatal error, so ignore */
2283 dev_info(ictx->dev, "could not get a minor number for "
2284 "display\n");
2285
2286 }
2287
2288 /**
2289 * Callback function for USB core API: Probe
2290 */
2291 static int __devinit imon_probe(struct usb_interface *interface,
2292 const struct usb_device_id *id)
2293 {
2294 struct usb_device *usbdev = NULL;
2295 struct usb_host_interface *iface_desc = NULL;
2296 struct usb_interface *first_if;
2297 struct device *dev = &interface->dev;
2298 int ifnum, sysfs_err;
2299 int ret = 0;
2300 struct imon_context *ictx = NULL;
2301 struct imon_context *first_if_ctx = NULL;
2302 u16 vendor, product;
2303
2304 usbdev = usb_get_dev(interface_to_usbdev(interface));
2305 iface_desc = interface->cur_altsetting;
2306 ifnum = iface_desc->desc.bInterfaceNumber;
2307 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2308 product = le16_to_cpu(usbdev->descriptor.idProduct);
2309
2310 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2311 __func__, vendor, product, ifnum);
2312
2313 /* prevent races probing devices w/multiple interfaces */
2314 mutex_lock(&driver_lock);
2315
2316 first_if = usb_ifnum_to_if(usbdev, 0);
2317 first_if_ctx = usb_get_intfdata(first_if);
2318
2319 if (ifnum == 0) {
2320 ictx = imon_init_intf0(interface);
2321 if (!ictx) {
2322 pr_err("failed to initialize context!\n");
2323 ret = -ENODEV;
2324 goto fail;
2325 }
2326
2327 } else {
2328 /* this is the secondary interface on the device */
2329 ictx = imon_init_intf1(interface, first_if_ctx);
2330 if (!ictx) {
2331 pr_err("failed to attach to context!\n");
2332 ret = -ENODEV;
2333 goto fail;
2334 }
2335
2336 }
2337
2338 usb_set_intfdata(interface, ictx);
2339
2340 if (ifnum == 0) {
2341 mutex_lock(&ictx->lock);
2342
2343 if (product == 0xffdc && ictx->rf_device) {
2344 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2345 &imon_rf_attr_group);
2346 if (sysfs_err)
2347 pr_err("Could not create RF sysfs entries(%d)\n",
2348 sysfs_err);
2349 }
2350
2351 if (ictx->display_supported)
2352 imon_init_display(ictx, interface);
2353
2354 mutex_unlock(&ictx->lock);
2355 }
2356
2357 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2358 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2359 usbdev->bus->busnum, usbdev->devnum);
2360
2361 mutex_unlock(&driver_lock);
2362
2363 return 0;
2364
2365 fail:
2366 mutex_unlock(&driver_lock);
2367 dev_err(dev, "unable to register, err %d\n", ret);
2368
2369 return ret;
2370 }
2371
2372 /**
2373 * Callback function for USB core API: disconnect
2374 */
2375 static void __devexit imon_disconnect(struct usb_interface *interface)
2376 {
2377 struct imon_context *ictx;
2378 struct device *dev;
2379 int ifnum;
2380
2381 /* prevent races with multi-interface device probing and display_open */
2382 mutex_lock(&driver_lock);
2383
2384 ictx = usb_get_intfdata(interface);
2385 dev = ictx->dev;
2386 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2387
2388 /*
2389 * sysfs_remove_group is safe to call even if sysfs_create_group
2390 * hasn't been called
2391 */
2392 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2393 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2394
2395 usb_set_intfdata(interface, NULL);
2396
2397 /* Abort ongoing write */
2398 if (ictx->tx.busy) {
2399 usb_kill_urb(ictx->tx_urb);
2400 complete_all(&ictx->tx.finished);
2401 }
2402
2403 if (ifnum == 0) {
2404 ictx->dev_present_intf0 = false;
2405 usb_kill_urb(ictx->rx_urb_intf0);
2406 input_unregister_device(ictx->idev);
2407 rc_unregister_device(ictx->rdev);
2408 if (ictx->display_supported) {
2409 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2410 usb_deregister_dev(interface, &imon_lcd_class);
2411 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
2412 usb_deregister_dev(interface, &imon_vfd_class);
2413 }
2414 } else {
2415 ictx->dev_present_intf1 = false;
2416 usb_kill_urb(ictx->rx_urb_intf1);
2417 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2418 input_unregister_device(ictx->touch);
2419 del_timer_sync(&ictx->ttimer);
2420 }
2421 }
2422
2423 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1)
2424 free_imon_context(ictx);
2425
2426 mutex_unlock(&driver_lock);
2427
2428 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2429 __func__, ifnum);
2430 }
2431
2432 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2433 {
2434 struct imon_context *ictx = usb_get_intfdata(intf);
2435 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2436
2437 if (ifnum == 0)
2438 usb_kill_urb(ictx->rx_urb_intf0);
2439 else
2440 usb_kill_urb(ictx->rx_urb_intf1);
2441
2442 return 0;
2443 }
2444
2445 static int imon_resume(struct usb_interface *intf)
2446 {
2447 int rc = 0;
2448 struct imon_context *ictx = usb_get_intfdata(intf);
2449 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2450
2451 if (ifnum == 0) {
2452 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2453 usb_rcvintpipe(ictx->usbdev_intf0,
2454 ictx->rx_endpoint_intf0->bEndpointAddress),
2455 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2456 usb_rx_callback_intf0, ictx,
2457 ictx->rx_endpoint_intf0->bInterval);
2458
2459 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2460
2461 } else {
2462 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2463 usb_rcvintpipe(ictx->usbdev_intf1,
2464 ictx->rx_endpoint_intf1->bEndpointAddress),
2465 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2466 usb_rx_callback_intf1, ictx,
2467 ictx->rx_endpoint_intf1->bInterval);
2468
2469 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2470 }
2471
2472 return rc;
2473 }
2474
2475 module_usb_driver(imon_driver);
kernel source for telekom puls (alcatel/mediatek)