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[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
38 #include <linux/input.h>
39 #include <linux/usb.h>
40 #include <linux/usb/input.h>
41 #include <media/rc-core.h>
42
43 #include <linux/time.h>
44 #include <linux/timer.h>
45
46 #define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
47 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
48 #define MOD_NAME "imon"
49 #define MOD_VERSION "0.9.3"
50
51 #define DISPLAY_MINOR_BASE 144
52 #define DEVICE_NAME "lcd%d"
53
54 #define BUF_CHUNK_SIZE 8
55 #define BUF_SIZE 128
56
57 #define BIT_DURATION 250 /* each bit received is 250us */
58
59 #define IMON_CLOCK_ENABLE_PACKETS 2
60
61 /*** P R O T O T Y P E S ***/
62
63 /* USB Callback prototypes */
64 static int imon_probe(struct usb_interface *interface,
65 const struct usb_device_id *id);
66 static void imon_disconnect(struct usb_interface *interface);
67 static void usb_rx_callback_intf0(struct urb *urb);
68 static void usb_rx_callback_intf1(struct urb *urb);
69 static void usb_tx_callback(struct urb *urb);
70
71 /* suspend/resume support */
72 static int imon_resume(struct usb_interface *intf);
73 static int imon_suspend(struct usb_interface *intf, pm_message_t message);
74
75 /* Display file_operations function prototypes */
76 static int display_open(struct inode *inode, struct file *file);
77 static int display_close(struct inode *inode, struct file *file);
78
79 /* VFD write operation */
80 static ssize_t vfd_write(struct file *file, const char *buf,
81 size_t n_bytes, loff_t *pos);
82
83 /* LCD file_operations override function prototypes */
84 static ssize_t lcd_write(struct file *file, const char *buf,
85 size_t n_bytes, loff_t *pos);
86
87 /*** G L O B A L S ***/
88
89 struct imon_context {
90 struct device *dev;
91 /* Newer devices have two interfaces */
92 struct usb_device *usbdev_intf0;
93 struct usb_device *usbdev_intf1;
94
95 bool display_supported; /* not all controllers do */
96 bool display_isopen; /* display port has been opened */
97 bool rf_device; /* true if iMON 2.4G LT/DT RF device */
98 bool rf_isassociating; /* RF remote associating */
99 bool dev_present_intf0; /* USB device presence, interface 0 */
100 bool dev_present_intf1; /* USB device presence, interface 1 */
101
102 struct mutex lock; /* to lock this object */
103 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
104
105 struct usb_endpoint_descriptor *rx_endpoint_intf0;
106 struct usb_endpoint_descriptor *rx_endpoint_intf1;
107 struct usb_endpoint_descriptor *tx_endpoint;
108 struct urb *rx_urb_intf0;
109 struct urb *rx_urb_intf1;
110 struct urb *tx_urb;
111 bool tx_control;
112 unsigned char usb_rx_buf[8];
113 unsigned char usb_tx_buf[8];
114
115 struct tx_t {
116 unsigned char data_buf[35]; /* user data buffer */
117 struct completion finished; /* wait for write to finish */
118 bool busy; /* write in progress */
119 int status; /* status of tx completion */
120 } tx;
121
122 u16 vendor; /* usb vendor ID */
123 u16 product; /* usb product ID */
124
125 struct rc_dev *rdev; /* rc-core device for remote */
126 struct input_dev *idev; /* input device for panel & IR mouse */
127 struct input_dev *touch; /* input device for touchscreen */
128
129 spinlock_t kc_lock; /* make sure we get keycodes right */
130 u32 kc; /* current input keycode */
131 u32 last_keycode; /* last reported input keycode */
132 u32 rc_scancode; /* the computed remote scancode */
133 u8 rc_toggle; /* the computed remote toggle bit */
134 u64 rc_type; /* iMON or MCE (RC6) IR protocol? */
135 bool release_code; /* some keys send a release code */
136
137 u8 display_type; /* store the display type */
138 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
139
140 char name_rdev[128]; /* rc input device name */
141 char phys_rdev[64]; /* rc input device phys path */
142
143 char name_idev[128]; /* input device name */
144 char phys_idev[64]; /* input device phys path */
145
146 char name_touch[128]; /* touch screen name */
147 char phys_touch[64]; /* touch screen phys path */
148 struct timer_list ttimer; /* touch screen timer */
149 int touch_x; /* x coordinate on touchscreen */
150 int touch_y; /* y coordinate on touchscreen */
151 };
152
153 #define TOUCH_TIMEOUT (HZ/30)
154
155 /* vfd character device file operations */
156 static const struct file_operations vfd_fops = {
157 .owner = THIS_MODULE,
158 .open = &display_open,
159 .write = &vfd_write,
160 .release = &display_close,
161 .llseek = noop_llseek,
162 };
163
164 /* lcd character device file operations */
165 static const struct file_operations lcd_fops = {
166 .owner = THIS_MODULE,
167 .open = &display_open,
168 .write = &lcd_write,
169 .release = &display_close,
170 .llseek = noop_llseek,
171 };
172
173 enum {
174 IMON_DISPLAY_TYPE_AUTO = 0,
175 IMON_DISPLAY_TYPE_VFD = 1,
176 IMON_DISPLAY_TYPE_LCD = 2,
177 IMON_DISPLAY_TYPE_VGA = 3,
178 IMON_DISPLAY_TYPE_NONE = 4,
179 };
180
181 enum {
182 IMON_KEY_IMON = 0,
183 IMON_KEY_MCE = 1,
184 IMON_KEY_PANEL = 2,
185 };
186
187 /*
188 * USB Device ID for iMON USB Control Boards
189 *
190 * The Windows drivers contain 6 different inf files, more or less one for
191 * each new device until the 0x0034-0x0046 devices, which all use the same
192 * driver. Some of the devices in the 34-46 range haven't been definitively
193 * identified yet. Early devices have either a TriGem Computer, Inc. or a
194 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
195 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
196 * the ffdc and later devices, which do onboard decoding.
197 */
198 static struct usb_device_id imon_usb_id_table[] = {
199 /*
200 * Several devices with this same device ID, all use iMON_PAD.inf
201 * SoundGraph iMON PAD (IR & VFD)
202 * SoundGraph iMON PAD (IR & LCD)
203 * SoundGraph iMON Knob (IR only)
204 */
205 { USB_DEVICE(0x15c2, 0xffdc) },
206
207 /*
208 * Newer devices, all driven by the latest iMON Windows driver, full
209 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
210 * Need user input to fill in details on unknown devices.
211 */
212 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
213 { USB_DEVICE(0x15c2, 0x0034) },
214 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
215 { USB_DEVICE(0x15c2, 0x0035) },
216 /* SoundGraph iMON OEM VFD (IR & VFD) */
217 { USB_DEVICE(0x15c2, 0x0036) },
218 /* device specifics unknown */
219 { USB_DEVICE(0x15c2, 0x0037) },
220 /* SoundGraph iMON OEM LCD (IR & LCD) */
221 { USB_DEVICE(0x15c2, 0x0038) },
222 /* SoundGraph iMON UltraBay (IR & LCD) */
223 { USB_DEVICE(0x15c2, 0x0039) },
224 /* device specifics unknown */
225 { USB_DEVICE(0x15c2, 0x003a) },
226 /* device specifics unknown */
227 { USB_DEVICE(0x15c2, 0x003b) },
228 /* SoundGraph iMON OEM Inside (IR only) */
229 { USB_DEVICE(0x15c2, 0x003c) },
230 /* device specifics unknown */
231 { USB_DEVICE(0x15c2, 0x003d) },
232 /* device specifics unknown */
233 { USB_DEVICE(0x15c2, 0x003e) },
234 /* device specifics unknown */
235 { USB_DEVICE(0x15c2, 0x003f) },
236 /* device specifics unknown */
237 { USB_DEVICE(0x15c2, 0x0040) },
238 /* SoundGraph iMON MINI (IR only) */
239 { USB_DEVICE(0x15c2, 0x0041) },
240 /* Antec Veris Multimedia Station EZ External (IR only) */
241 { USB_DEVICE(0x15c2, 0x0042) },
242 /* Antec Veris Multimedia Station Basic Internal (IR only) */
243 { USB_DEVICE(0x15c2, 0x0043) },
244 /* Antec Veris Multimedia Station Elite (IR & VFD) */
245 { USB_DEVICE(0x15c2, 0x0044) },
246 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
247 { USB_DEVICE(0x15c2, 0x0045) },
248 /* device specifics unknown */
249 { USB_DEVICE(0x15c2, 0x0046) },
250 {}
251 };
252
253 /* USB Device data */
254 static struct usb_driver imon_driver = {
255 .name = MOD_NAME,
256 .probe = imon_probe,
257 .disconnect = imon_disconnect,
258 .suspend = imon_suspend,
259 .resume = imon_resume,
260 .id_table = imon_usb_id_table,
261 };
262
263 static struct usb_class_driver imon_vfd_class = {
264 .name = DEVICE_NAME,
265 .fops = &vfd_fops,
266 .minor_base = DISPLAY_MINOR_BASE,
267 };
268
269 static struct usb_class_driver imon_lcd_class = {
270 .name = DEVICE_NAME,
271 .fops = &lcd_fops,
272 .minor_base = DISPLAY_MINOR_BASE,
273 };
274
275 /* imon receiver front panel/knob key table */
276 static const struct {
277 u64 hw_code;
278 u32 keycode;
279 } imon_panel_key_table[] = {
280 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
281 { 0x000000001200ffeell, KEY_UP },
282 { 0x000000001300ffeell, KEY_DOWN },
283 { 0x000000001400ffeell, KEY_LEFT },
284 { 0x000000001500ffeell, KEY_RIGHT },
285 { 0x000000001600ffeell, KEY_ENTER },
286 { 0x000000001700ffeell, KEY_ESC },
287 { 0x000000001f00ffeell, KEY_AUDIO },
288 { 0x000000002000ffeell, KEY_VIDEO },
289 { 0x000000002100ffeell, KEY_CAMERA },
290 { 0x000000002700ffeell, KEY_DVD },
291 { 0x000000002300ffeell, KEY_TV },
292 { 0x000000002b00ffeell, KEY_EXIT },
293 { 0x000000002c00ffeell, KEY_SELECT },
294 { 0x000000002d00ffeell, KEY_MENU },
295 { 0x000000000500ffeell, KEY_PREVIOUS },
296 { 0x000000000700ffeell, KEY_REWIND },
297 { 0x000000000400ffeell, KEY_STOP },
298 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
299 { 0x000000000800ffeell, KEY_FASTFORWARD },
300 { 0x000000000600ffeell, KEY_NEXT },
301 { 0x000000010000ffeell, KEY_RIGHT },
302 { 0x000001000000ffeell, KEY_LEFT },
303 { 0x000000003d00ffeell, KEY_SELECT },
304 { 0x000100000000ffeell, KEY_VOLUMEUP },
305 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
306 { 0x000000000100ffeell, KEY_MUTE },
307 /* 0xffdc iMON MCE VFD */
308 { 0x00010000ffffffeell, KEY_VOLUMEUP },
309 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
310 /* iMON Knob values */
311 { 0x000100ffffffffeell, KEY_VOLUMEUP },
312 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
313 { 0x000008ffffffffeell, KEY_MUTE },
314 };
315
316 /* to prevent races between open() and disconnect(), probing, etc */
317 static DEFINE_MUTEX(driver_lock);
318
319 /* Module bookkeeping bits */
320 MODULE_AUTHOR(MOD_AUTHOR);
321 MODULE_DESCRIPTION(MOD_DESC);
322 MODULE_VERSION(MOD_VERSION);
323 MODULE_LICENSE("GPL");
324 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
325
326 static bool debug;
327 module_param(debug, bool, S_IRUGO | S_IWUSR);
328 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
329
330 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
331 static int display_type;
332 module_param(display_type, int, S_IRUGO);
333 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
334 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
335
336 static int pad_stabilize = 1;
337 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
338 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
339 "presses in arrow key mode. 0=disable, 1=enable (default).");
340
341 /*
342 * In certain use cases, mouse mode isn't really helpful, and could actually
343 * cause confusion, so allow disabling it when the IR device is open.
344 */
345 static bool nomouse;
346 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
347 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
348 "open. 0=don't disable, 1=disable. (default: don't disable)");
349
350 /* threshold at which a pad push registers as an arrow key in kbd mode */
351 static int pad_thresh;
352 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
353 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
354 "arrow key in kbd mode (default: 28)");
355
356
357 static void free_imon_context(struct imon_context *ictx)
358 {
359 struct device *dev = ictx->dev;
360
361 usb_free_urb(ictx->tx_urb);
362 usb_free_urb(ictx->rx_urb_intf0);
363 usb_free_urb(ictx->rx_urb_intf1);
364 kfree(ictx);
365
366 dev_dbg(dev, "%s: iMON context freed\n", __func__);
367 }
368
369 /**
370 * Called when the Display device (e.g. /dev/lcd0)
371 * is opened by the application.
372 */
373 static int display_open(struct inode *inode, struct file *file)
374 {
375 struct usb_interface *interface;
376 struct imon_context *ictx = NULL;
377 int subminor;
378 int retval = 0;
379
380 /* prevent races with disconnect */
381 mutex_lock(&driver_lock);
382
383 subminor = iminor(inode);
384 interface = usb_find_interface(&imon_driver, subminor);
385 if (!interface) {
386 pr_err("could not find interface for minor %d\n", subminor);
387 retval = -ENODEV;
388 goto exit;
389 }
390 ictx = usb_get_intfdata(interface);
391
392 if (!ictx) {
393 pr_err("no context found for minor %d\n", subminor);
394 retval = -ENODEV;
395 goto exit;
396 }
397
398 mutex_lock(&ictx->lock);
399
400 if (!ictx->display_supported) {
401 pr_err("display not supported by device\n");
402 retval = -ENODEV;
403 } else if (ictx->display_isopen) {
404 pr_err("display port is already open\n");
405 retval = -EBUSY;
406 } else {
407 ictx->display_isopen = true;
408 file->private_data = ictx;
409 dev_dbg(ictx->dev, "display port opened\n");
410 }
411
412 mutex_unlock(&ictx->lock);
413
414 exit:
415 mutex_unlock(&driver_lock);
416 return retval;
417 }
418
419 /**
420 * Called when the display device (e.g. /dev/lcd0)
421 * is closed by the application.
422 */
423 static int display_close(struct inode *inode, struct file *file)
424 {
425 struct imon_context *ictx = NULL;
426 int retval = 0;
427
428 ictx = file->private_data;
429
430 if (!ictx) {
431 pr_err("no context for device\n");
432 return -ENODEV;
433 }
434
435 mutex_lock(&ictx->lock);
436
437 if (!ictx->display_supported) {
438 pr_err("display not supported by device\n");
439 retval = -ENODEV;
440 } else if (!ictx->display_isopen) {
441 pr_err("display is not open\n");
442 retval = -EIO;
443 } else {
444 ictx->display_isopen = false;
445 dev_dbg(ictx->dev, "display port closed\n");
446 if (!ictx->dev_present_intf0) {
447 /*
448 * Device disconnected before close and IR port is not
449 * open. If IR port is open, context will be deleted by
450 * ir_close.
451 */
452 mutex_unlock(&ictx->lock);
453 free_imon_context(ictx);
454 return retval;
455 }
456 }
457
458 mutex_unlock(&ictx->lock);
459 return retval;
460 }
461
462 /**
463 * Sends a packet to the device -- this function must be called with
464 * ictx->lock held, or its unlock/lock sequence while waiting for tx
465 * to complete can/will lead to a deadlock.
466 */
467 static int send_packet(struct imon_context *ictx)
468 {
469 unsigned int pipe;
470 unsigned long timeout;
471 int interval = 0;
472 int retval = 0;
473 struct usb_ctrlrequest *control_req = NULL;
474
475 /* Check if we need to use control or interrupt urb */
476 if (!ictx->tx_control) {
477 pipe = usb_sndintpipe(ictx->usbdev_intf0,
478 ictx->tx_endpoint->bEndpointAddress);
479 interval = ictx->tx_endpoint->bInterval;
480
481 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
482 ictx->usb_tx_buf,
483 sizeof(ictx->usb_tx_buf),
484 usb_tx_callback, ictx, interval);
485
486 ictx->tx_urb->actual_length = 0;
487 } else {
488 /* fill request into kmalloc'ed space: */
489 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
490 GFP_KERNEL);
491 if (control_req == NULL)
492 return -ENOMEM;
493
494 /* setup packet is '21 09 0200 0001 0008' */
495 control_req->bRequestType = 0x21;
496 control_req->bRequest = 0x09;
497 control_req->wValue = cpu_to_le16(0x0200);
498 control_req->wIndex = cpu_to_le16(0x0001);
499 control_req->wLength = cpu_to_le16(0x0008);
500
501 /* control pipe is endpoint 0x00 */
502 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
503
504 /* build the control urb */
505 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
506 pipe, (unsigned char *)control_req,
507 ictx->usb_tx_buf,
508 sizeof(ictx->usb_tx_buf),
509 usb_tx_callback, ictx);
510 ictx->tx_urb->actual_length = 0;
511 }
512
513 init_completion(&ictx->tx.finished);
514 ictx->tx.busy = true;
515 smp_rmb(); /* ensure later readers know we're busy */
516
517 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
518 if (retval) {
519 ictx->tx.busy = false;
520 smp_rmb(); /* ensure later readers know we're not busy */
521 pr_err("error submitting urb(%d)\n", retval);
522 } else {
523 /* Wait for transmission to complete (or abort) */
524 mutex_unlock(&ictx->lock);
525 retval = wait_for_completion_interruptible(
526 &ictx->tx.finished);
527 if (retval)
528 pr_err("task interrupted\n");
529 mutex_lock(&ictx->lock);
530
531 retval = ictx->tx.status;
532 if (retval)
533 pr_err("packet tx failed (%d)\n", retval);
534 }
535
536 kfree(control_req);
537
538 /*
539 * Induce a mandatory 5ms delay before returning, as otherwise,
540 * send_packet can get called so rapidly as to overwhelm the device,
541 * particularly on faster systems and/or those with quirky usb.
542 */
543 timeout = msecs_to_jiffies(5);
544 set_current_state(TASK_UNINTERRUPTIBLE);
545 schedule_timeout(timeout);
546
547 return retval;
548 }
549
550 /**
551 * Sends an associate packet to the iMON 2.4G.
552 *
553 * This might not be such a good idea, since it has an id collision with
554 * some versions of the "IR & VFD" combo. The only way to determine if it
555 * is an RF version is to look at the product description string. (Which
556 * we currently do not fetch).
557 */
558 static int send_associate_24g(struct imon_context *ictx)
559 {
560 int retval;
561 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
562 0x00, 0x00, 0x00, 0x20 };
563
564 if (!ictx) {
565 pr_err("no context for device\n");
566 return -ENODEV;
567 }
568
569 if (!ictx->dev_present_intf0) {
570 pr_err("no iMON device present\n");
571 return -ENODEV;
572 }
573
574 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
575 retval = send_packet(ictx);
576
577 return retval;
578 }
579
580 /**
581 * Sends packets to setup and show clock on iMON display
582 *
583 * Arguments: year - last 2 digits of year, month - 1..12,
584 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
585 * hour - 0..23, minute - 0..59, second - 0..59
586 */
587 static int send_set_imon_clock(struct imon_context *ictx,
588 unsigned int year, unsigned int month,
589 unsigned int day, unsigned int dow,
590 unsigned int hour, unsigned int minute,
591 unsigned int second)
592 {
593 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
594 int retval = 0;
595 int i;
596
597 if (!ictx) {
598 pr_err("no context for device\n");
599 return -ENODEV;
600 }
601
602 switch (ictx->display_type) {
603 case IMON_DISPLAY_TYPE_LCD:
604 clock_enable_pkt[0][0] = 0x80;
605 clock_enable_pkt[0][1] = year;
606 clock_enable_pkt[0][2] = month-1;
607 clock_enable_pkt[0][3] = day;
608 clock_enable_pkt[0][4] = hour;
609 clock_enable_pkt[0][5] = minute;
610 clock_enable_pkt[0][6] = second;
611
612 clock_enable_pkt[1][0] = 0x80;
613 clock_enable_pkt[1][1] = 0;
614 clock_enable_pkt[1][2] = 0;
615 clock_enable_pkt[1][3] = 0;
616 clock_enable_pkt[1][4] = 0;
617 clock_enable_pkt[1][5] = 0;
618 clock_enable_pkt[1][6] = 0;
619
620 if (ictx->product == 0xffdc) {
621 clock_enable_pkt[0][7] = 0x50;
622 clock_enable_pkt[1][7] = 0x51;
623 } else {
624 clock_enable_pkt[0][7] = 0x88;
625 clock_enable_pkt[1][7] = 0x8a;
626 }
627
628 break;
629
630 case IMON_DISPLAY_TYPE_VFD:
631 clock_enable_pkt[0][0] = year;
632 clock_enable_pkt[0][1] = month-1;
633 clock_enable_pkt[0][2] = day;
634 clock_enable_pkt[0][3] = dow;
635 clock_enable_pkt[0][4] = hour;
636 clock_enable_pkt[0][5] = minute;
637 clock_enable_pkt[0][6] = second;
638 clock_enable_pkt[0][7] = 0x40;
639
640 clock_enable_pkt[1][0] = 0;
641 clock_enable_pkt[1][1] = 0;
642 clock_enable_pkt[1][2] = 1;
643 clock_enable_pkt[1][3] = 0;
644 clock_enable_pkt[1][4] = 0;
645 clock_enable_pkt[1][5] = 0;
646 clock_enable_pkt[1][6] = 0;
647 clock_enable_pkt[1][7] = 0x42;
648
649 break;
650
651 default:
652 return -ENODEV;
653 }
654
655 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
656 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
657 retval = send_packet(ictx);
658 if (retval) {
659 pr_err("send_packet failed for packet %d\n", i);
660 break;
661 }
662 }
663
664 return retval;
665 }
666
667 /**
668 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
669 */
670 static ssize_t show_associate_remote(struct device *d,
671 struct device_attribute *attr,
672 char *buf)
673 {
674 struct imon_context *ictx = dev_get_drvdata(d);
675
676 if (!ictx)
677 return -ENODEV;
678
679 mutex_lock(&ictx->lock);
680 if (ictx->rf_isassociating)
681 strcpy(buf, "associating\n");
682 else
683 strcpy(buf, "closed\n");
684
685 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
686 "instructions on how to associate your iMON 2.4G DT/LT "
687 "remote\n");
688 mutex_unlock(&ictx->lock);
689 return strlen(buf);
690 }
691
692 static ssize_t store_associate_remote(struct device *d,
693 struct device_attribute *attr,
694 const char *buf, size_t count)
695 {
696 struct imon_context *ictx;
697
698 ictx = dev_get_drvdata(d);
699
700 if (!ictx)
701 return -ENODEV;
702
703 mutex_lock(&ictx->lock);
704 ictx->rf_isassociating = true;
705 send_associate_24g(ictx);
706 mutex_unlock(&ictx->lock);
707
708 return count;
709 }
710
711 /**
712 * sysfs functions to control internal imon clock
713 */
714 static ssize_t show_imon_clock(struct device *d,
715 struct device_attribute *attr, char *buf)
716 {
717 struct imon_context *ictx = dev_get_drvdata(d);
718 size_t len;
719
720 if (!ictx)
721 return -ENODEV;
722
723 mutex_lock(&ictx->lock);
724
725 if (!ictx->display_supported) {
726 len = snprintf(buf, PAGE_SIZE, "Not supported.");
727 } else {
728 len = snprintf(buf, PAGE_SIZE,
729 "To set the clock on your iMON display:\n"
730 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
731 "%s", ictx->display_isopen ?
732 "\nNOTE: imon device must be closed\n" : "");
733 }
734
735 mutex_unlock(&ictx->lock);
736
737 return len;
738 }
739
740 static ssize_t store_imon_clock(struct device *d,
741 struct device_attribute *attr,
742 const char *buf, size_t count)
743 {
744 struct imon_context *ictx = dev_get_drvdata(d);
745 ssize_t retval;
746 unsigned int year, month, day, dow, hour, minute, second;
747
748 if (!ictx)
749 return -ENODEV;
750
751 mutex_lock(&ictx->lock);
752
753 if (!ictx->display_supported) {
754 retval = -ENODEV;
755 goto exit;
756 } else if (ictx->display_isopen) {
757 retval = -EBUSY;
758 goto exit;
759 }
760
761 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
762 &hour, &minute, &second) != 7) {
763 retval = -EINVAL;
764 goto exit;
765 }
766
767 if ((month < 1 || month > 12) ||
768 (day < 1 || day > 31) || (dow > 6) ||
769 (hour > 23) || (minute > 59) || (second > 59)) {
770 retval = -EINVAL;
771 goto exit;
772 }
773
774 retval = send_set_imon_clock(ictx, year, month, day, dow,
775 hour, minute, second);
776 if (retval)
777 goto exit;
778
779 retval = count;
780 exit:
781 mutex_unlock(&ictx->lock);
782
783 return retval;
784 }
785
786
787 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
788 store_imon_clock);
789
790 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
791 store_associate_remote);
792
793 static struct attribute *imon_display_sysfs_entries[] = {
794 &dev_attr_imon_clock.attr,
795 NULL
796 };
797
798 static struct attribute_group imon_display_attr_group = {
799 .attrs = imon_display_sysfs_entries
800 };
801
802 static struct attribute *imon_rf_sysfs_entries[] = {
803 &dev_attr_associate_remote.attr,
804 NULL
805 };
806
807 static struct attribute_group imon_rf_attr_group = {
808 .attrs = imon_rf_sysfs_entries
809 };
810
811 /**
812 * Writes data to the VFD. The iMON VFD is 2x16 characters
813 * and requires data in 5 consecutive USB interrupt packets,
814 * each packet but the last carrying 7 bytes.
815 *
816 * I don't know if the VFD board supports features such as
817 * scrolling, clearing rows, blanking, etc. so at
818 * the caller must provide a full screen of data. If fewer
819 * than 32 bytes are provided spaces will be appended to
820 * generate a full screen.
821 */
822 static ssize_t vfd_write(struct file *file, const char *buf,
823 size_t n_bytes, loff_t *pos)
824 {
825 int i;
826 int offset;
827 int seq;
828 int retval = 0;
829 struct imon_context *ictx;
830 const unsigned char vfd_packet6[] = {
831 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
832
833 ictx = file->private_data;
834 if (!ictx) {
835 pr_err("no context for device\n");
836 return -ENODEV;
837 }
838
839 mutex_lock(&ictx->lock);
840
841 if (!ictx->dev_present_intf0) {
842 pr_err("no iMON device present\n");
843 retval = -ENODEV;
844 goto exit;
845 }
846
847 if (n_bytes <= 0 || n_bytes > 32) {
848 pr_err("invalid payload size\n");
849 retval = -EINVAL;
850 goto exit;
851 }
852
853 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
854 retval = -EFAULT;
855 goto exit;
856 }
857
858 /* Pad with spaces */
859 for (i = n_bytes; i < 32; ++i)
860 ictx->tx.data_buf[i] = ' ';
861
862 for (i = 32; i < 35; ++i)
863 ictx->tx.data_buf[i] = 0xFF;
864
865 offset = 0;
866 seq = 0;
867
868 do {
869 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
870 ictx->usb_tx_buf[7] = (unsigned char) seq;
871
872 retval = send_packet(ictx);
873 if (retval) {
874 pr_err("send packet failed for packet #%d\n", seq / 2);
875 goto exit;
876 } else {
877 seq += 2;
878 offset += 7;
879 }
880
881 } while (offset < 35);
882
883 /* Send packet #6 */
884 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
885 ictx->usb_tx_buf[7] = (unsigned char) seq;
886 retval = send_packet(ictx);
887 if (retval)
888 pr_err("send packet failed for packet #%d\n", seq / 2);
889
890 exit:
891 mutex_unlock(&ictx->lock);
892
893 return (!retval) ? n_bytes : retval;
894 }
895
896 /**
897 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
898 * packets. We accept data as 16 hexadecimal digits, followed by a
899 * newline (to make it easy to drive the device from a command-line
900 * -- even though the actual binary data is a bit complicated).
901 *
902 * The device itself is not a "traditional" text-mode display. It's
903 * actually a 16x96 pixel bitmap display. That means if you want to
904 * display text, you've got to have your own "font" and translate the
905 * text into bitmaps for display. This is really flexible (you can
906 * display whatever diacritics you need, and so on), but it's also
907 * a lot more complicated than most LCDs...
908 */
909 static ssize_t lcd_write(struct file *file, const char *buf,
910 size_t n_bytes, loff_t *pos)
911 {
912 int retval = 0;
913 struct imon_context *ictx;
914
915 ictx = file->private_data;
916 if (!ictx) {
917 pr_err("no context for device\n");
918 return -ENODEV;
919 }
920
921 mutex_lock(&ictx->lock);
922
923 if (!ictx->display_supported) {
924 pr_err("no iMON display present\n");
925 retval = -ENODEV;
926 goto exit;
927 }
928
929 if (n_bytes != 8) {
930 pr_err("invalid payload size: %d (expected 8)\n", (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("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 switch (rc_type) {
1018 case RC_TYPE_RC6:
1019 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1020 ir_proto_packet[0] = 0x01;
1021 break;
1022 case RC_TYPE_UNKNOWN:
1023 case RC_TYPE_OTHER:
1024 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1025 if (!pad_stabilize)
1026 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1027 /* ir_proto_packet[0] = 0x00; // already the default */
1028 rc_type = RC_TYPE_OTHER;
1029 break;
1030 default:
1031 dev_warn(dev, "Unsupported IR protocol specified, overriding "
1032 "to iMON IR protocol\n");
1033 if (!pad_stabilize)
1034 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1035 /* ir_proto_packet[0] = 0x00; // already the default */
1036 rc_type = RC_TYPE_OTHER;
1037 break;
1038 }
1039
1040 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1041
1042 if (!mutex_is_locked(&ictx->lock)) {
1043 unlock = true;
1044 mutex_lock(&ictx->lock);
1045 }
1046
1047 retval = send_packet(ictx);
1048 if (retval)
1049 goto out;
1050
1051 ictx->rc_type = rc_type;
1052 ictx->pad_mouse = false;
1053
1054 out:
1055 if (unlock)
1056 mutex_unlock(&ictx->lock);
1057
1058 return retval;
1059 }
1060
1061 static inline int tv2int(const struct timeval *a, const struct timeval *b)
1062 {
1063 int usecs = 0;
1064 int sec = 0;
1065
1066 if (b->tv_usec > a->tv_usec) {
1067 usecs = 1000000;
1068 sec--;
1069 }
1070
1071 usecs += a->tv_usec - b->tv_usec;
1072
1073 sec += a->tv_sec - b->tv_sec;
1074 sec *= 1000;
1075 usecs /= 1000;
1076 sec += usecs;
1077
1078 if (sec < 0)
1079 sec = 1000;
1080
1081 return sec;
1082 }
1083
1084 /**
1085 * The directional pad behaves a bit differently, depending on whether this is
1086 * one of the older ffdc devices or a newer device. Newer devices appear to
1087 * have a higher resolution matrix for more precise mouse movement, but it
1088 * makes things overly sensitive in keyboard mode, so we do some interesting
1089 * contortions to make it less touchy. Older devices run through the same
1090 * routine with shorter timeout and a smaller threshold.
1091 */
1092 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1093 {
1094 struct timeval ct;
1095 static struct timeval prev_time = {0, 0};
1096 static struct timeval hit_time = {0, 0};
1097 static int x, y, prev_result, hits;
1098 int result = 0;
1099 int msec, msec_hit;
1100
1101 do_gettimeofday(&ct);
1102 msec = tv2int(&ct, &prev_time);
1103 msec_hit = tv2int(&ct, &hit_time);
1104
1105 if (msec > 100) {
1106 x = 0;
1107 y = 0;
1108 hits = 0;
1109 }
1110
1111 x += a;
1112 y += b;
1113
1114 prev_time = ct;
1115
1116 if (abs(x) > threshold || abs(y) > threshold) {
1117 if (abs(y) > abs(x))
1118 result = (y > 0) ? 0x7F : 0x80;
1119 else
1120 result = (x > 0) ? 0x7F00 : 0x8000;
1121
1122 x = 0;
1123 y = 0;
1124
1125 if (result == prev_result) {
1126 hits++;
1127
1128 if (hits > 3) {
1129 switch (result) {
1130 case 0x7F:
1131 y = 17 * threshold / 30;
1132 break;
1133 case 0x80:
1134 y -= 17 * threshold / 30;
1135 break;
1136 case 0x7F00:
1137 x = 17 * threshold / 30;
1138 break;
1139 case 0x8000:
1140 x -= 17 * threshold / 30;
1141 break;
1142 }
1143 }
1144
1145 if (hits == 2 && msec_hit < timeout) {
1146 result = 0;
1147 hits = 1;
1148 }
1149 } else {
1150 prev_result = result;
1151 hits = 1;
1152 hit_time = ct;
1153 }
1154 }
1155
1156 return result;
1157 }
1158
1159 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1160 {
1161 u32 keycode;
1162 u32 release;
1163 bool is_release_code = false;
1164
1165 /* Look for the initial press of a button */
1166 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1167 ictx->rc_toggle = 0x0;
1168 ictx->rc_scancode = scancode;
1169
1170 /* Look for the release of a button */
1171 if (keycode == KEY_RESERVED) {
1172 release = scancode & ~0x4000;
1173 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1174 if (keycode != KEY_RESERVED)
1175 is_release_code = true;
1176 }
1177
1178 ictx->release_code = is_release_code;
1179
1180 return keycode;
1181 }
1182
1183 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1184 {
1185 u32 keycode;
1186
1187 #define MCE_KEY_MASK 0x7000
1188 #define MCE_TOGGLE_BIT 0x8000
1189
1190 /*
1191 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1192 * (the toggle bit flipping between alternating key presses), while
1193 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1194 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1195 * but we can't or them into all codes, as some keys are decoded in
1196 * a different way w/o the same use of the toggle bit...
1197 */
1198 if (scancode & 0x80000000)
1199 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1200
1201 ictx->rc_scancode = scancode;
1202 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1203
1204 /* not used in mce mode, but make sure we know its false */
1205 ictx->release_code = false;
1206
1207 return keycode;
1208 }
1209
1210 static u32 imon_panel_key_lookup(u64 code)
1211 {
1212 int i;
1213 u32 keycode = KEY_RESERVED;
1214
1215 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1216 if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
1217 keycode = imon_panel_key_table[i].keycode;
1218 break;
1219 }
1220 }
1221
1222 return keycode;
1223 }
1224
1225 static bool imon_mouse_event(struct imon_context *ictx,
1226 unsigned char *buf, int len)
1227 {
1228 char rel_x = 0x00, rel_y = 0x00;
1229 u8 right_shift = 1;
1230 bool mouse_input = true;
1231 int dir = 0;
1232 unsigned long flags;
1233
1234 spin_lock_irqsave(&ictx->kc_lock, flags);
1235
1236 /* newer iMON device PAD or mouse button */
1237 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1238 rel_x = buf[2];
1239 rel_y = buf[3];
1240 right_shift = 1;
1241 /* 0xffdc iMON PAD or mouse button input */
1242 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1243 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1244 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1245 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1246 if (buf[0] & 0x02)
1247 rel_x |= ~0x0f;
1248 rel_x = rel_x + rel_x / 2;
1249 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1250 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1251 if (buf[0] & 0x01)
1252 rel_y |= ~0x0f;
1253 rel_y = rel_y + rel_y / 2;
1254 right_shift = 2;
1255 /* some ffdc devices decode mouse buttons differently... */
1256 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1257 right_shift = 2;
1258 /* ch+/- buttons, which we use for an emulated scroll wheel */
1259 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1260 dir = 1;
1261 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1262 dir = -1;
1263 } else
1264 mouse_input = false;
1265
1266 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1267
1268 if (mouse_input) {
1269 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1270
1271 if (dir) {
1272 input_report_rel(ictx->idev, REL_WHEEL, dir);
1273 } else if (rel_x || rel_y) {
1274 input_report_rel(ictx->idev, REL_X, rel_x);
1275 input_report_rel(ictx->idev, REL_Y, rel_y);
1276 } else {
1277 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1278 input_report_key(ictx->idev, BTN_RIGHT,
1279 buf[1] >> right_shift & 0x1);
1280 }
1281 input_sync(ictx->idev);
1282 spin_lock_irqsave(&ictx->kc_lock, flags);
1283 ictx->last_keycode = ictx->kc;
1284 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1285 }
1286
1287 return mouse_input;
1288 }
1289
1290 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1291 {
1292 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1293 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1294 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1295 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1296 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1297 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1298 input_sync(ictx->touch);
1299 }
1300
1301 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1302 {
1303 int dir = 0;
1304 char rel_x = 0x00, rel_y = 0x00;
1305 u16 timeout, threshold;
1306 u32 scancode = KEY_RESERVED;
1307 unsigned long flags;
1308
1309 /*
1310 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1311 * contain a position coordinate (x,y), with each component ranging
1312 * from -14 to 14. We want to down-sample this to only 4 discrete values
1313 * for up/down/left/right arrow keys. Also, when you get too close to
1314 * diagonals, it has a tendency to jump back and forth, so lets try to
1315 * ignore when they get too close.
1316 */
1317 if (ictx->product != 0xffdc) {
1318 /* first, pad to 8 bytes so it conforms with everything else */
1319 buf[5] = buf[6] = buf[7] = 0;
1320 timeout = 500; /* in msecs */
1321 /* (2*threshold) x (2*threshold) square */
1322 threshold = pad_thresh ? pad_thresh : 28;
1323 rel_x = buf[2];
1324 rel_y = buf[3];
1325
1326 if (ictx->rc_type == RC_TYPE_OTHER && pad_stabilize) {
1327 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1328 dir = stabilize((int)rel_x, (int)rel_y,
1329 timeout, threshold);
1330 if (!dir) {
1331 spin_lock_irqsave(&ictx->kc_lock,
1332 flags);
1333 ictx->kc = KEY_UNKNOWN;
1334 spin_unlock_irqrestore(&ictx->kc_lock,
1335 flags);
1336 return;
1337 }
1338 buf[2] = dir & 0xFF;
1339 buf[3] = (dir >> 8) & 0xFF;
1340 scancode = be32_to_cpu(*((u32 *)buf));
1341 }
1342 } else {
1343 /*
1344 * Hack alert: instead of using keycodes, we have
1345 * to use hard-coded scancodes here...
1346 */
1347 if (abs(rel_y) > abs(rel_x)) {
1348 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1349 buf[3] = 0;
1350 if (rel_y > 0)
1351 scancode = 0x01007f00; /* KEY_DOWN */
1352 else
1353 scancode = 0x01008000; /* KEY_UP */
1354 } else {
1355 buf[2] = 0;
1356 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1357 if (rel_x > 0)
1358 scancode = 0x0100007f; /* KEY_RIGHT */
1359 else
1360 scancode = 0x01000080; /* KEY_LEFT */
1361 }
1362 }
1363
1364 /*
1365 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1366 * device (15c2:ffdc). The remote generates various codes from
1367 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1368 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1369 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1370 * reversed endianess. Extract direction from buffer, rotate endianess,
1371 * adjust sign and feed the values into stabilize(). The resulting codes
1372 * will be 0x01008000, 0x01007F00, which match the newer devices.
1373 */
1374 } else {
1375 timeout = 10; /* in msecs */
1376 /* (2*threshold) x (2*threshold) square */
1377 threshold = pad_thresh ? pad_thresh : 15;
1378
1379 /* buf[1] is x */
1380 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1381 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1382 if (buf[0] & 0x02)
1383 rel_x |= ~0x10+1;
1384 /* buf[2] is y */
1385 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1386 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1387 if (buf[0] & 0x01)
1388 rel_y |= ~0x10+1;
1389
1390 buf[0] = 0x01;
1391 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1392
1393 if (ictx->rc_type == RC_TYPE_OTHER && pad_stabilize) {
1394 dir = stabilize((int)rel_x, (int)rel_y,
1395 timeout, threshold);
1396 if (!dir) {
1397 spin_lock_irqsave(&ictx->kc_lock, flags);
1398 ictx->kc = KEY_UNKNOWN;
1399 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1400 return;
1401 }
1402 buf[2] = dir & 0xFF;
1403 buf[3] = (dir >> 8) & 0xFF;
1404 scancode = be32_to_cpu(*((u32 *)buf));
1405 } else {
1406 /*
1407 * Hack alert: instead of using keycodes, we have
1408 * to use hard-coded scancodes here...
1409 */
1410 if (abs(rel_y) > abs(rel_x)) {
1411 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1412 buf[3] = 0;
1413 if (rel_y > 0)
1414 scancode = 0x01007f00; /* KEY_DOWN */
1415 else
1416 scancode = 0x01008000; /* KEY_UP */
1417 } else {
1418 buf[2] = 0;
1419 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1420 if (rel_x > 0)
1421 scancode = 0x0100007f; /* KEY_RIGHT */
1422 else
1423 scancode = 0x01000080; /* KEY_LEFT */
1424 }
1425 }
1426 }
1427
1428 if (scancode) {
1429 spin_lock_irqsave(&ictx->kc_lock, flags);
1430 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1431 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1432 }
1433 }
1434
1435 /**
1436 * figure out if these is a press or a release. We don't actually
1437 * care about repeats, as those will be auto-generated within the IR
1438 * subsystem for repeating scancodes.
1439 */
1440 static int imon_parse_press_type(struct imon_context *ictx,
1441 unsigned char *buf, u8 ktype)
1442 {
1443 int press_type = 0;
1444 unsigned long flags;
1445
1446 spin_lock_irqsave(&ictx->kc_lock, flags);
1447
1448 /* key release of 0x02XXXXXX key */
1449 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1450 ictx->kc = ictx->last_keycode;
1451
1452 /* mouse button release on (some) 0xffdc devices */
1453 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1454 buf[2] == 0x81 && buf[3] == 0xb7)
1455 ictx->kc = ictx->last_keycode;
1456
1457 /* mouse button release on (some other) 0xffdc devices */
1458 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1459 buf[2] == 0x81 && buf[3] == 0xb7)
1460 ictx->kc = ictx->last_keycode;
1461
1462 /* mce-specific button handling, no keyup events */
1463 else if (ktype == IMON_KEY_MCE) {
1464 ictx->rc_toggle = buf[2];
1465 press_type = 1;
1466
1467 /* incoherent or irrelevant data */
1468 } else if (ictx->kc == KEY_RESERVED)
1469 press_type = -EINVAL;
1470
1471 /* key release of 0xXXXXXXb7 key */
1472 else if (ictx->release_code)
1473 press_type = 0;
1474
1475 /* this is a button press */
1476 else
1477 press_type = 1;
1478
1479 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1480
1481 return press_type;
1482 }
1483
1484 /**
1485 * Process the incoming packet
1486 */
1487 static void imon_incoming_packet(struct imon_context *ictx,
1488 struct urb *urb, int intf)
1489 {
1490 int len = urb->actual_length;
1491 unsigned char *buf = urb->transfer_buffer;
1492 struct device *dev = ictx->dev;
1493 unsigned long flags;
1494 u32 kc;
1495 bool norelease = false;
1496 int i;
1497 u64 scancode;
1498 int press_type = 0;
1499 int msec;
1500 struct timeval t;
1501 static struct timeval prev_time = { 0, 0 };
1502 u8 ktype;
1503
1504 /* filter out junk data on the older 0xffdc imon devices */
1505 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1506 return;
1507
1508 /* Figure out what key was pressed */
1509 if (len == 8 && buf[7] == 0xee) {
1510 scancode = be64_to_cpu(*((u64 *)buf));
1511 ktype = IMON_KEY_PANEL;
1512 kc = imon_panel_key_lookup(scancode);
1513 } else {
1514 scancode = be32_to_cpu(*((u32 *)buf));
1515 if (ictx->rc_type == RC_TYPE_RC6) {
1516 ktype = IMON_KEY_IMON;
1517 if (buf[0] == 0x80)
1518 ktype = IMON_KEY_MCE;
1519 kc = imon_mce_key_lookup(ictx, scancode);
1520 } else {
1521 ktype = IMON_KEY_IMON;
1522 kc = imon_remote_key_lookup(ictx, scancode);
1523 }
1524 }
1525
1526 spin_lock_irqsave(&ictx->kc_lock, flags);
1527 /* keyboard/mouse mode toggle button */
1528 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1529 ictx->last_keycode = kc;
1530 if (!nomouse) {
1531 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1532 dev_dbg(dev, "toggling to %s mode\n",
1533 ictx->pad_mouse ? "mouse" : "keyboard");
1534 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1535 return;
1536 } else {
1537 ictx->pad_mouse = false;
1538 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1539 }
1540 }
1541
1542 ictx->kc = kc;
1543 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1544
1545 /* send touchscreen events through input subsystem if touchpad data */
1546 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1547 buf[7] == 0x86) {
1548 imon_touch_event(ictx, buf);
1549 return;
1550
1551 /* look for mouse events with pad in mouse mode */
1552 } else if (ictx->pad_mouse) {
1553 if (imon_mouse_event(ictx, buf, len))
1554 return;
1555 }
1556
1557 /* Now for some special handling to convert pad input to arrow keys */
1558 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1559 ((len == 8) && (buf[0] & 0x40) &&
1560 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1561 len = 8;
1562 imon_pad_to_keys(ictx, buf);
1563 norelease = true;
1564 }
1565
1566 if (debug) {
1567 printk(KERN_INFO "intf%d decoded packet: ", intf);
1568 for (i = 0; i < len; ++i)
1569 printk("%02x ", buf[i]);
1570 printk("\n");
1571 }
1572
1573 press_type = imon_parse_press_type(ictx, buf, ktype);
1574 if (press_type < 0)
1575 goto not_input_data;
1576
1577 spin_lock_irqsave(&ictx->kc_lock, flags);
1578 if (ictx->kc == KEY_UNKNOWN)
1579 goto unknown_key;
1580 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1581
1582 if (ktype != IMON_KEY_PANEL) {
1583 if (press_type == 0)
1584 rc_keyup(ictx->rdev);
1585 else {
1586 rc_keydown(ictx->rdev, ictx->rc_scancode, ictx->rc_toggle);
1587 spin_lock_irqsave(&ictx->kc_lock, flags);
1588 ictx->last_keycode = ictx->kc;
1589 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1590 }
1591 return;
1592 }
1593
1594 /* Only panel type events left to process now */
1595 spin_lock_irqsave(&ictx->kc_lock, flags);
1596
1597 /* KEY_MUTE repeats from knob need to be suppressed */
1598 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1599 do_gettimeofday(&t);
1600 msec = tv2int(&t, &prev_time);
1601 prev_time = t;
1602 if (msec < ictx->idev->rep[REP_DELAY]) {
1603 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1604 return;
1605 }
1606 }
1607 kc = ictx->kc;
1608
1609 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1610
1611 input_report_key(ictx->idev, kc, press_type);
1612 input_sync(ictx->idev);
1613
1614 /* panel keys don't generate a release */
1615 input_report_key(ictx->idev, kc, 0);
1616 input_sync(ictx->idev);
1617
1618 ictx->last_keycode = kc;
1619
1620 return;
1621
1622 unknown_key:
1623 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1624 dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
1625 (long long)scancode);
1626 return;
1627
1628 not_input_data:
1629 if (len != 8) {
1630 dev_warn(dev, "imon %s: invalid incoming packet "
1631 "size (len = %d, intf%d)\n", __func__, len, intf);
1632 return;
1633 }
1634
1635 /* iMON 2.4G associate frame */
1636 if (buf[0] == 0x00 &&
1637 buf[2] == 0xFF && /* REFID */
1638 buf[3] == 0xFF &&
1639 buf[4] == 0xFF &&
1640 buf[5] == 0xFF && /* iMON 2.4G */
1641 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1642 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1643 dev_warn(dev, "%s: remote associated refid=%02X\n",
1644 __func__, buf[1]);
1645 ictx->rf_isassociating = false;
1646 }
1647 }
1648
1649 /**
1650 * Callback function for USB core API: receive data
1651 */
1652 static void usb_rx_callback_intf0(struct urb *urb)
1653 {
1654 struct imon_context *ictx;
1655 int intfnum = 0;
1656
1657 if (!urb)
1658 return;
1659
1660 ictx = (struct imon_context *)urb->context;
1661 if (!ictx)
1662 return;
1663
1664 switch (urb->status) {
1665 case -ENOENT: /* usbcore unlink successful! */
1666 return;
1667
1668 case -ESHUTDOWN: /* transport endpoint was shut down */
1669 break;
1670
1671 case 0:
1672 imon_incoming_packet(ictx, urb, intfnum);
1673 break;
1674
1675 default:
1676 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1677 __func__, urb->status);
1678 break;
1679 }
1680
1681 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1682 }
1683
1684 static void usb_rx_callback_intf1(struct urb *urb)
1685 {
1686 struct imon_context *ictx;
1687 int intfnum = 1;
1688
1689 if (!urb)
1690 return;
1691
1692 ictx = (struct imon_context *)urb->context;
1693 if (!ictx)
1694 return;
1695
1696 switch (urb->status) {
1697 case -ENOENT: /* usbcore unlink successful! */
1698 return;
1699
1700 case -ESHUTDOWN: /* transport endpoint was shut down */
1701 break;
1702
1703 case 0:
1704 imon_incoming_packet(ictx, urb, intfnum);
1705 break;
1706
1707 default:
1708 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1709 __func__, urb->status);
1710 break;
1711 }
1712
1713 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1714 }
1715
1716 /*
1717 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1718 * devices, and all of them constantly spew interrupts, even when there
1719 * is no actual data to report. However, byte 6 of this buffer looks like
1720 * its unique across device variants, so we're trying to key off that to
1721 * figure out which display type (if any) and what IR protocol the device
1722 * actually supports. These devices have their IR protocol hard-coded into
1723 * their firmware, they can't be changed on the fly like the newer hardware.
1724 */
1725 static void imon_get_ffdc_type(struct imon_context *ictx)
1726 {
1727 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1728 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1729 u64 allowed_protos = RC_TYPE_OTHER;
1730
1731 switch (ffdc_cfg_byte) {
1732 /* iMON Knob, no display, iMON IR + vol knob */
1733 case 0x21:
1734 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1735 ictx->display_supported = false;
1736 break;
1737 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1738 case 0x4e:
1739 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1740 ictx->display_supported = false;
1741 ictx->rf_device = true;
1742 break;
1743 /* iMON VFD, no IR (does have vol knob tho) */
1744 case 0x35:
1745 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1746 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1747 break;
1748 /* iMON VFD, iMON IR */
1749 case 0x24:
1750 case 0x85:
1751 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1752 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1753 break;
1754 /* iMON VFD, MCE IR */
1755 case 0x9e:
1756 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1757 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1758 allowed_protos = RC_TYPE_RC6;
1759 break;
1760 /* iMON LCD, MCE IR */
1761 case 0x9f:
1762 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1763 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1764 allowed_protos = RC_TYPE_RC6;
1765 break;
1766 default:
1767 dev_info(ictx->dev, "Unknown 0xffdc device, "
1768 "defaulting to VFD and iMON IR");
1769 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1770 break;
1771 }
1772
1773 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1774
1775 ictx->display_type = detected_display_type;
1776 ictx->rc_type = allowed_protos;
1777 }
1778
1779 static void imon_set_display_type(struct imon_context *ictx)
1780 {
1781 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1782
1783 /*
1784 * Try to auto-detect the type of display if the user hasn't set
1785 * it by hand via the display_type modparam. Default is VFD.
1786 */
1787
1788 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1789 switch (ictx->product) {
1790 case 0xffdc:
1791 /* set in imon_get_ffdc_type() */
1792 configured_display_type = ictx->display_type;
1793 break;
1794 case 0x0034:
1795 case 0x0035:
1796 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1797 break;
1798 case 0x0038:
1799 case 0x0039:
1800 case 0x0045:
1801 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1802 break;
1803 case 0x003c:
1804 case 0x0041:
1805 case 0x0042:
1806 case 0x0043:
1807 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1808 ictx->display_supported = false;
1809 break;
1810 case 0x0036:
1811 case 0x0044:
1812 default:
1813 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1814 break;
1815 }
1816 } else {
1817 configured_display_type = display_type;
1818 if (display_type == IMON_DISPLAY_TYPE_NONE)
1819 ictx->display_supported = false;
1820 else
1821 ictx->display_supported = true;
1822 dev_info(ictx->dev, "%s: overriding display type to %d via "
1823 "modparam\n", __func__, display_type);
1824 }
1825
1826 ictx->display_type = configured_display_type;
1827 }
1828
1829 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1830 {
1831 struct rc_dev *rdev;
1832 int ret;
1833 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
1834 0x00, 0x00, 0x00, 0x88 };
1835
1836 rdev = rc_allocate_device();
1837 if (!rdev) {
1838 dev_err(ictx->dev, "remote control dev allocation failed\n");
1839 goto out;
1840 }
1841
1842 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1843 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1844 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1845 sizeof(ictx->phys_rdev));
1846 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1847
1848 rdev->input_name = ictx->name_rdev;
1849 rdev->input_phys = ictx->phys_rdev;
1850 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
1851 rdev->dev.parent = ictx->dev;
1852
1853 rdev->priv = ictx;
1854 rdev->driver_type = RC_DRIVER_SCANCODE;
1855 rdev->allowed_protos = RC_TYPE_OTHER | RC_TYPE_RC6; /* iMON PAD or MCE */
1856 rdev->change_protocol = imon_ir_change_protocol;
1857 rdev->driver_name = MOD_NAME;
1858
1859 /* Enable front-panel buttons and/or knobs */
1860 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1861 ret = send_packet(ictx);
1862 /* Not fatal, but warn about it */
1863 if (ret)
1864 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1865
1866 if (ictx->product == 0xffdc) {
1867 imon_get_ffdc_type(ictx);
1868 rdev->allowed_protos = ictx->rc_type;
1869 }
1870
1871 imon_set_display_type(ictx);
1872
1873 if (ictx->rc_type == RC_TYPE_RC6)
1874 rdev->map_name = RC_MAP_IMON_MCE;
1875 else
1876 rdev->map_name = RC_MAP_IMON_PAD;
1877
1878 ret = rc_register_device(rdev);
1879 if (ret < 0) {
1880 dev_err(ictx->dev, "remote input dev register failed\n");
1881 goto out;
1882 }
1883
1884 return rdev;
1885
1886 out:
1887 rc_free_device(rdev);
1888 return NULL;
1889 }
1890
1891 static struct input_dev *imon_init_idev(struct imon_context *ictx)
1892 {
1893 struct input_dev *idev;
1894 int ret, i;
1895
1896 idev = input_allocate_device();
1897 if (!idev) {
1898 dev_err(ictx->dev, "input dev allocation failed\n");
1899 goto out;
1900 }
1901
1902 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1903 "iMON Panel, Knob and Mouse(%04x:%04x)",
1904 ictx->vendor, ictx->product);
1905 idev->name = ictx->name_idev;
1906
1907 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
1908 sizeof(ictx->phys_idev));
1909 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
1910 idev->phys = ictx->phys_idev;
1911
1912 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
1913
1914 idev->keybit[BIT_WORD(BTN_MOUSE)] =
1915 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1916 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
1917 BIT_MASK(REL_WHEEL);
1918
1919 /* panel and/or knob code support */
1920 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1921 u32 kc = imon_panel_key_table[i].keycode;
1922 __set_bit(kc, idev->keybit);
1923 }
1924
1925 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
1926 idev->dev.parent = ictx->dev;
1927 input_set_drvdata(idev, ictx);
1928
1929 ret = input_register_device(idev);
1930 if (ret < 0) {
1931 dev_err(ictx->dev, "input dev register failed\n");
1932 goto out;
1933 }
1934
1935 return idev;
1936
1937 out:
1938 input_free_device(idev);
1939 return NULL;
1940 }
1941
1942 static struct input_dev *imon_init_touch(struct imon_context *ictx)
1943 {
1944 struct input_dev *touch;
1945 int ret;
1946
1947 touch = input_allocate_device();
1948 if (!touch) {
1949 dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
1950 goto touch_alloc_failed;
1951 }
1952
1953 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
1954 "iMON USB Touchscreen (%04x:%04x)",
1955 ictx->vendor, ictx->product);
1956 touch->name = ictx->name_touch;
1957
1958 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
1959 sizeof(ictx->phys_touch));
1960 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
1961 touch->phys = ictx->phys_touch;
1962
1963 touch->evbit[0] =
1964 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1965 touch->keybit[BIT_WORD(BTN_TOUCH)] =
1966 BIT_MASK(BTN_TOUCH);
1967 input_set_abs_params(touch, ABS_X,
1968 0x00, 0xfff, 0, 0);
1969 input_set_abs_params(touch, ABS_Y,
1970 0x00, 0xfff, 0, 0);
1971
1972 input_set_drvdata(touch, ictx);
1973
1974 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
1975 touch->dev.parent = ictx->dev;
1976 ret = input_register_device(touch);
1977 if (ret < 0) {
1978 dev_info(ictx->dev, "touchscreen input dev register failed\n");
1979 goto touch_register_failed;
1980 }
1981
1982 return touch;
1983
1984 touch_register_failed:
1985 input_free_device(ictx->touch);
1986
1987 touch_alloc_failed:
1988 return NULL;
1989 }
1990
1991 static bool imon_find_endpoints(struct imon_context *ictx,
1992 struct usb_host_interface *iface_desc)
1993 {
1994 struct usb_endpoint_descriptor *ep;
1995 struct usb_endpoint_descriptor *rx_endpoint = NULL;
1996 struct usb_endpoint_descriptor *tx_endpoint = NULL;
1997 int ifnum = iface_desc->desc.bInterfaceNumber;
1998 int num_endpts = iface_desc->desc.bNumEndpoints;
1999 int i, ep_dir, ep_type;
2000 bool ir_ep_found = false;
2001 bool display_ep_found = false;
2002 bool tx_control = false;
2003
2004 /*
2005 * Scan the endpoint list and set:
2006 * first input endpoint = IR endpoint
2007 * first output endpoint = display endpoint
2008 */
2009 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2010 ep = &iface_desc->endpoint[i].desc;
2011 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2012 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
2013
2014 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2015 ep_type == USB_ENDPOINT_XFER_INT) {
2016
2017 rx_endpoint = ep;
2018 ir_ep_found = true;
2019 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2020
2021 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2022 ep_type == USB_ENDPOINT_XFER_INT) {
2023 tx_endpoint = ep;
2024 display_ep_found = true;
2025 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2026 }
2027 }
2028
2029 if (ifnum == 0) {
2030 ictx->rx_endpoint_intf0 = rx_endpoint;
2031 /*
2032 * tx is used to send characters to lcd/vfd, associate RF
2033 * remotes, set IR protocol, and maybe more...
2034 */
2035 ictx->tx_endpoint = tx_endpoint;
2036 } else {
2037 ictx->rx_endpoint_intf1 = rx_endpoint;
2038 }
2039
2040 /*
2041 * If we didn't find a display endpoint, this is probably one of the
2042 * newer iMON devices that use control urb instead of interrupt
2043 */
2044 if (!display_ep_found) {
2045 tx_control = true;
2046 display_ep_found = true;
2047 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
2048 "interface OUT endpoint\n", __func__);
2049 }
2050
2051 /*
2052 * Some iMON receivers have no display. Unfortunately, it seems
2053 * that SoundGraph recycles device IDs between devices both with
2054 * and without... :\
2055 */
2056 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2057 display_ep_found = false;
2058 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2059 }
2060
2061 /*
2062 * iMON Touch devices have a VGA touchscreen, but no "display", as
2063 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2064 */
2065 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2066 display_ep_found = false;
2067 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2068 }
2069
2070 /* Input endpoint is mandatory */
2071 if (!ir_ep_found)
2072 pr_err("no valid input (IR) endpoint found\n");
2073
2074 ictx->tx_control = tx_control;
2075
2076 if (display_ep_found)
2077 ictx->display_supported = true;
2078
2079 return ir_ep_found;
2080
2081 }
2082
2083 static struct imon_context *imon_init_intf0(struct usb_interface *intf)
2084 {
2085 struct imon_context *ictx;
2086 struct urb *rx_urb;
2087 struct urb *tx_urb;
2088 struct device *dev = &intf->dev;
2089 struct usb_host_interface *iface_desc;
2090 int ret = -ENOMEM;
2091
2092 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
2093 if (!ictx) {
2094 dev_err(dev, "%s: kzalloc failed for context", __func__);
2095 goto exit;
2096 }
2097 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2098 if (!rx_urb) {
2099 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
2100 goto rx_urb_alloc_failed;
2101 }
2102 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2103 if (!tx_urb) {
2104 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
2105 __func__);
2106 goto tx_urb_alloc_failed;
2107 }
2108
2109 mutex_init(&ictx->lock);
2110 spin_lock_init(&ictx->kc_lock);
2111
2112 mutex_lock(&ictx->lock);
2113
2114 ictx->dev = dev;
2115 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2116 ictx->dev_present_intf0 = true;
2117 ictx->rx_urb_intf0 = rx_urb;
2118 ictx->tx_urb = tx_urb;
2119 ictx->rf_device = false;
2120
2121 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2122 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2123
2124 ret = -ENODEV;
2125 iface_desc = intf->cur_altsetting;
2126 if (!imon_find_endpoints(ictx, iface_desc)) {
2127 goto find_endpoint_failed;
2128 }
2129
2130 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2131 usb_rcvintpipe(ictx->usbdev_intf0,
2132 ictx->rx_endpoint_intf0->bEndpointAddress),
2133 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2134 usb_rx_callback_intf0, ictx,
2135 ictx->rx_endpoint_intf0->bInterval);
2136
2137 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2138 if (ret) {
2139 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2140 goto urb_submit_failed;
2141 }
2142
2143 ictx->idev = imon_init_idev(ictx);
2144 if (!ictx->idev) {
2145 dev_err(dev, "%s: input device setup failed\n", __func__);
2146 goto idev_setup_failed;
2147 }
2148
2149 ictx->rdev = imon_init_rdev(ictx);
2150 if (!ictx->rdev) {
2151 dev_err(dev, "%s: rc device setup failed\n", __func__);
2152 goto rdev_setup_failed;
2153 }
2154
2155 mutex_unlock(&ictx->lock);
2156 return ictx;
2157
2158 rdev_setup_failed:
2159 input_unregister_device(ictx->idev);
2160 idev_setup_failed:
2161 usb_kill_urb(ictx->rx_urb_intf0);
2162 urb_submit_failed:
2163 find_endpoint_failed:
2164 mutex_unlock(&ictx->lock);
2165 usb_free_urb(tx_urb);
2166 tx_urb_alloc_failed:
2167 usb_free_urb(rx_urb);
2168 rx_urb_alloc_failed:
2169 kfree(ictx);
2170 exit:
2171 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2172
2173 return NULL;
2174 }
2175
2176 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2177 struct imon_context *ictx)
2178 {
2179 struct urb *rx_urb;
2180 struct usb_host_interface *iface_desc;
2181 int ret = -ENOMEM;
2182
2183 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2184 if (!rx_urb) {
2185 pr_err("usb_alloc_urb failed for IR urb\n");
2186 goto rx_urb_alloc_failed;
2187 }
2188
2189 mutex_lock(&ictx->lock);
2190
2191 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2192 init_timer(&ictx->ttimer);
2193 ictx->ttimer.data = (unsigned long)ictx;
2194 ictx->ttimer.function = imon_touch_display_timeout;
2195 }
2196
2197 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2198 ictx->dev_present_intf1 = true;
2199 ictx->rx_urb_intf1 = rx_urb;
2200
2201 ret = -ENODEV;
2202 iface_desc = intf->cur_altsetting;
2203 if (!imon_find_endpoints(ictx, iface_desc))
2204 goto find_endpoint_failed;
2205
2206 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2207 ictx->touch = imon_init_touch(ictx);
2208 if (!ictx->touch)
2209 goto touch_setup_failed;
2210 } else
2211 ictx->touch = NULL;
2212
2213 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2214 usb_rcvintpipe(ictx->usbdev_intf1,
2215 ictx->rx_endpoint_intf1->bEndpointAddress),
2216 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2217 usb_rx_callback_intf1, ictx,
2218 ictx->rx_endpoint_intf1->bInterval);
2219
2220 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2221
2222 if (ret) {
2223 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2224 goto urb_submit_failed;
2225 }
2226
2227 mutex_unlock(&ictx->lock);
2228 return ictx;
2229
2230 urb_submit_failed:
2231 if (ictx->touch)
2232 input_unregister_device(ictx->touch);
2233 touch_setup_failed:
2234 find_endpoint_failed:
2235 mutex_unlock(&ictx->lock);
2236 usb_free_urb(rx_urb);
2237 rx_urb_alloc_failed:
2238 dev_err(ictx->dev, "unable to initialize intf0, err %d\n", ret);
2239
2240 return NULL;
2241 }
2242
2243 static void imon_init_display(struct imon_context *ictx,
2244 struct usb_interface *intf)
2245 {
2246 int ret;
2247
2248 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2249
2250 /* set up sysfs entry for built-in clock */
2251 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2252 if (ret)
2253 dev_err(ictx->dev, "Could not create display sysfs "
2254 "entries(%d)", ret);
2255
2256 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2257 ret = usb_register_dev(intf, &imon_lcd_class);
2258 else
2259 ret = usb_register_dev(intf, &imon_vfd_class);
2260 if (ret)
2261 /* Not a fatal error, so ignore */
2262 dev_info(ictx->dev, "could not get a minor number for "
2263 "display\n");
2264
2265 }
2266
2267 /**
2268 * Callback function for USB core API: Probe
2269 */
2270 static int __devinit imon_probe(struct usb_interface *interface,
2271 const struct usb_device_id *id)
2272 {
2273 struct usb_device *usbdev = NULL;
2274 struct usb_host_interface *iface_desc = NULL;
2275 struct usb_interface *first_if;
2276 struct device *dev = &interface->dev;
2277 int ifnum, code_length, sysfs_err;
2278 int ret = 0;
2279 struct imon_context *ictx = NULL;
2280 struct imon_context *first_if_ctx = NULL;
2281 u16 vendor, product;
2282
2283 code_length = BUF_CHUNK_SIZE * 8;
2284
2285 usbdev = usb_get_dev(interface_to_usbdev(interface));
2286 iface_desc = interface->cur_altsetting;
2287 ifnum = iface_desc->desc.bInterfaceNumber;
2288 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2289 product = le16_to_cpu(usbdev->descriptor.idProduct);
2290
2291 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2292 __func__, vendor, product, ifnum);
2293
2294 /* prevent races probing devices w/multiple interfaces */
2295 mutex_lock(&driver_lock);
2296
2297 first_if = usb_ifnum_to_if(usbdev, 0);
2298 first_if_ctx = usb_get_intfdata(first_if);
2299
2300 if (ifnum == 0) {
2301 ictx = imon_init_intf0(interface);
2302 if (!ictx) {
2303 pr_err("failed to initialize context!\n");
2304 ret = -ENODEV;
2305 goto fail;
2306 }
2307
2308 } else {
2309 /* this is the secondary interface on the device */
2310 ictx = imon_init_intf1(interface, first_if_ctx);
2311 if (!ictx) {
2312 pr_err("failed to attach to context!\n");
2313 ret = -ENODEV;
2314 goto fail;
2315 }
2316
2317 }
2318
2319 usb_set_intfdata(interface, ictx);
2320
2321 if (ifnum == 0) {
2322 mutex_lock(&ictx->lock);
2323
2324 if (product == 0xffdc && ictx->rf_device) {
2325 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2326 &imon_rf_attr_group);
2327 if (sysfs_err)
2328 pr_err("Could not create RF sysfs entries(%d)\n",
2329 sysfs_err);
2330 }
2331
2332 if (ictx->display_supported)
2333 imon_init_display(ictx, interface);
2334
2335 mutex_unlock(&ictx->lock);
2336 }
2337
2338 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2339 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2340 usbdev->bus->busnum, usbdev->devnum);
2341
2342 mutex_unlock(&driver_lock);
2343
2344 return 0;
2345
2346 fail:
2347 mutex_unlock(&driver_lock);
2348 dev_err(dev, "unable to register, err %d\n", ret);
2349
2350 return ret;
2351 }
2352
2353 /**
2354 * Callback function for USB core API: disconnect
2355 */
2356 static void __devexit imon_disconnect(struct usb_interface *interface)
2357 {
2358 struct imon_context *ictx;
2359 struct device *dev;
2360 int ifnum;
2361
2362 /* prevent races with multi-interface device probing and display_open */
2363 mutex_lock(&driver_lock);
2364
2365 ictx = usb_get_intfdata(interface);
2366 dev = ictx->dev;
2367 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2368
2369 mutex_lock(&ictx->lock);
2370
2371 /*
2372 * sysfs_remove_group is safe to call even if sysfs_create_group
2373 * hasn't been called
2374 */
2375 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2376 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2377
2378 usb_set_intfdata(interface, NULL);
2379
2380 /* Abort ongoing write */
2381 if (ictx->tx.busy) {
2382 usb_kill_urb(ictx->tx_urb);
2383 complete_all(&ictx->tx.finished);
2384 }
2385
2386 if (ifnum == 0) {
2387 ictx->dev_present_intf0 = false;
2388 usb_kill_urb(ictx->rx_urb_intf0);
2389 input_unregister_device(ictx->idev);
2390 rc_unregister_device(ictx->rdev);
2391 if (ictx->display_supported) {
2392 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2393 usb_deregister_dev(interface, &imon_lcd_class);
2394 else
2395 usb_deregister_dev(interface, &imon_vfd_class);
2396 }
2397 } else {
2398 ictx->dev_present_intf1 = false;
2399 usb_kill_urb(ictx->rx_urb_intf1);
2400 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2401 input_unregister_device(ictx->touch);
2402 }
2403
2404 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) {
2405 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2406 del_timer_sync(&ictx->ttimer);
2407 mutex_unlock(&ictx->lock);
2408 if (!ictx->display_isopen)
2409 free_imon_context(ictx);
2410 } else
2411 mutex_unlock(&ictx->lock);
2412
2413 mutex_unlock(&driver_lock);
2414
2415 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2416 __func__, ifnum);
2417 }
2418
2419 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2420 {
2421 struct imon_context *ictx = usb_get_intfdata(intf);
2422 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2423
2424 if (ifnum == 0)
2425 usb_kill_urb(ictx->rx_urb_intf0);
2426 else
2427 usb_kill_urb(ictx->rx_urb_intf1);
2428
2429 return 0;
2430 }
2431
2432 static int imon_resume(struct usb_interface *intf)
2433 {
2434 int rc = 0;
2435 struct imon_context *ictx = usb_get_intfdata(intf);
2436 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2437
2438 if (ifnum == 0) {
2439 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2440 usb_rcvintpipe(ictx->usbdev_intf0,
2441 ictx->rx_endpoint_intf0->bEndpointAddress),
2442 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2443 usb_rx_callback_intf0, ictx,
2444 ictx->rx_endpoint_intf0->bInterval);
2445
2446 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2447
2448 } else {
2449 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2450 usb_rcvintpipe(ictx->usbdev_intf1,
2451 ictx->rx_endpoint_intf1->bEndpointAddress),
2452 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2453 usb_rx_callback_intf1, ictx,
2454 ictx->rx_endpoint_intf1->bInterval);
2455
2456 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2457 }
2458
2459 return rc;
2460 }
2461
2462 static int __init imon_init(void)
2463 {
2464 int rc;
2465
2466 rc = usb_register(&imon_driver);
2467 if (rc) {
2468 pr_err("usb register failed(%d)\n", rc);
2469 rc = -ENODEV;
2470 }
2471
2472 return rc;
2473 }
2474
2475 static void __exit imon_exit(void)
2476 {
2477 usb_deregister(&imon_driver);
2478 }
2479
2480 module_init(imon_init);
2481 module_exit(imon_exit);
kernel source for telekom puls (alcatel/mediatek)