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Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[deliverable/linux.git] / drivers / media / IR / 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/ir-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 "0.9.2"
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 struct ir_dev_props *props;
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 input_dev *rdev; /* input 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 ir_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 = 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_PROG1 }, /* Go */
282 { 0x000000001f00ffeell, KEY_AUDIO },
283 { 0x000000002000ffeell, KEY_VIDEO },
284 { 0x000000002100ffeell, KEY_CAMERA },
285 { 0x000000002700ffeell, KEY_DVD },
286 { 0x000000002300ffeell, KEY_TV },
287 { 0x000000000500ffeell, KEY_PREVIOUS },
288 { 0x000000000700ffeell, KEY_REWIND },
289 { 0x000000000400ffeell, KEY_STOP },
290 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
291 { 0x000000000800ffeell, KEY_FASTFORWARD },
292 { 0x000000000600ffeell, KEY_NEXT },
293 { 0x000000010000ffeell, KEY_RIGHT },
294 { 0x000001000000ffeell, KEY_LEFT },
295 { 0x000000003d00ffeell, KEY_SELECT },
296 { 0x000100000000ffeell, KEY_VOLUMEUP },
297 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
298 { 0x000000000100ffeell, KEY_MUTE },
299 /* 0xffdc iMON MCE VFD */
300 { 0x00010000ffffffeell, KEY_VOLUMEUP },
301 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
302 /* iMON Knob values */
303 { 0x000100ffffffffeell, KEY_VOLUMEUP },
304 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
305 { 0x000008ffffffffeell, KEY_MUTE },
306 };
307
308 /* to prevent races between open() and disconnect(), probing, etc */
309 static DEFINE_MUTEX(driver_lock);
310
311 /* Module bookkeeping bits */
312 MODULE_AUTHOR(MOD_AUTHOR);
313 MODULE_DESCRIPTION(MOD_DESC);
314 MODULE_VERSION(MOD_VERSION);
315 MODULE_LICENSE("GPL");
316 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
317
318 static bool debug;
319 module_param(debug, bool, S_IRUGO | S_IWUSR);
320 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
321
322 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
323 static int display_type;
324 module_param(display_type, int, S_IRUGO);
325 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
326 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
327
328 static int pad_stabilize = 1;
329 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
330 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
331 "presses in arrow key mode. 0=disable, 1=enable (default).");
332
333 /*
334 * In certain use cases, mouse mode isn't really helpful, and could actually
335 * cause confusion, so allow disabling it when the IR device is open.
336 */
337 static bool nomouse;
338 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
339 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
340 "open. 0=don't disable, 1=disable. (default: don't disable)");
341
342 /* threshold at which a pad push registers as an arrow key in kbd mode */
343 static int pad_thresh;
344 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
345 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
346 "arrow key in kbd mode (default: 28)");
347
348
349 static void free_imon_context(struct imon_context *ictx)
350 {
351 struct device *dev = ictx->dev;
352
353 usb_free_urb(ictx->tx_urb);
354 usb_free_urb(ictx->rx_urb_intf0);
355 usb_free_urb(ictx->rx_urb_intf1);
356 kfree(ictx);
357
358 dev_dbg(dev, "%s: iMON context freed\n", __func__);
359 }
360
361 /**
362 * Called when the Display device (e.g. /dev/lcd0)
363 * is opened by the application.
364 */
365 static int display_open(struct inode *inode, struct file *file)
366 {
367 struct usb_interface *interface;
368 struct imon_context *ictx = NULL;
369 int subminor;
370 int retval = 0;
371
372 /* prevent races with disconnect */
373 mutex_lock(&driver_lock);
374
375 subminor = iminor(inode);
376 interface = usb_find_interface(&imon_driver, subminor);
377 if (!interface) {
378 pr_err("could not find interface for minor %d\n", subminor);
379 retval = -ENODEV;
380 goto exit;
381 }
382 ictx = usb_get_intfdata(interface);
383
384 if (!ictx) {
385 pr_err("no context found for minor %d\n", subminor);
386 retval = -ENODEV;
387 goto exit;
388 }
389
390 mutex_lock(&ictx->lock);
391
392 if (!ictx->display_supported) {
393 pr_err("display not supported by device\n");
394 retval = -ENODEV;
395 } else if (ictx->display_isopen) {
396 pr_err("display port is already open\n");
397 retval = -EBUSY;
398 } else {
399 ictx->display_isopen = true;
400 file->private_data = ictx;
401 dev_dbg(ictx->dev, "display port opened\n");
402 }
403
404 mutex_unlock(&ictx->lock);
405
406 exit:
407 mutex_unlock(&driver_lock);
408 return retval;
409 }
410
411 /**
412 * Called when the display device (e.g. /dev/lcd0)
413 * is closed by the application.
414 */
415 static int display_close(struct inode *inode, struct file *file)
416 {
417 struct imon_context *ictx = NULL;
418 int retval = 0;
419
420 ictx = file->private_data;
421
422 if (!ictx) {
423 pr_err("no context for device\n");
424 return -ENODEV;
425 }
426
427 mutex_lock(&ictx->lock);
428
429 if (!ictx->display_supported) {
430 pr_err("display not supported by device\n");
431 retval = -ENODEV;
432 } else if (!ictx->display_isopen) {
433 pr_err("display is not open\n");
434 retval = -EIO;
435 } else {
436 ictx->display_isopen = false;
437 dev_dbg(ictx->dev, "display port closed\n");
438 if (!ictx->dev_present_intf0) {
439 /*
440 * Device disconnected before close and IR port is not
441 * open. If IR port is open, context will be deleted by
442 * ir_close.
443 */
444 mutex_unlock(&ictx->lock);
445 free_imon_context(ictx);
446 return retval;
447 }
448 }
449
450 mutex_unlock(&ictx->lock);
451 return retval;
452 }
453
454 /**
455 * Sends a packet to the device -- this function must be called
456 * with ictx->lock held.
457 */
458 static int send_packet(struct imon_context *ictx)
459 {
460 unsigned int pipe;
461 unsigned long timeout;
462 int interval = 0;
463 int retval = 0;
464 struct usb_ctrlrequest *control_req = NULL;
465
466 /* Check if we need to use control or interrupt urb */
467 if (!ictx->tx_control) {
468 pipe = usb_sndintpipe(ictx->usbdev_intf0,
469 ictx->tx_endpoint->bEndpointAddress);
470 interval = ictx->tx_endpoint->bInterval;
471
472 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
473 ictx->usb_tx_buf,
474 sizeof(ictx->usb_tx_buf),
475 usb_tx_callback, ictx, interval);
476
477 ictx->tx_urb->actual_length = 0;
478 } else {
479 /* fill request into kmalloc'ed space: */
480 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
481 GFP_KERNEL);
482 if (control_req == NULL)
483 return -ENOMEM;
484
485 /* setup packet is '21 09 0200 0001 0008' */
486 control_req->bRequestType = 0x21;
487 control_req->bRequest = 0x09;
488 control_req->wValue = cpu_to_le16(0x0200);
489 control_req->wIndex = cpu_to_le16(0x0001);
490 control_req->wLength = cpu_to_le16(0x0008);
491
492 /* control pipe is endpoint 0x00 */
493 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
494
495 /* build the control urb */
496 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
497 pipe, (unsigned char *)control_req,
498 ictx->usb_tx_buf,
499 sizeof(ictx->usb_tx_buf),
500 usb_tx_callback, ictx);
501 ictx->tx_urb->actual_length = 0;
502 }
503
504 init_completion(&ictx->tx.finished);
505 ictx->tx.busy = true;
506 smp_rmb(); /* ensure later readers know we're busy */
507
508 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
509 if (retval) {
510 ictx->tx.busy = false;
511 smp_rmb(); /* ensure later readers know we're not busy */
512 pr_err("error submitting urb(%d)\n", retval);
513 } else {
514 /* Wait for transmission to complete (or abort) */
515 mutex_unlock(&ictx->lock);
516 retval = wait_for_completion_interruptible(
517 &ictx->tx.finished);
518 if (retval)
519 pr_err("task interrupted\n");
520 mutex_lock(&ictx->lock);
521
522 retval = ictx->tx.status;
523 if (retval)
524 pr_err("packet tx failed (%d)\n", retval);
525 }
526
527 kfree(control_req);
528
529 /*
530 * Induce a mandatory 5ms delay before returning, as otherwise,
531 * send_packet can get called so rapidly as to overwhelm the device,
532 * particularly on faster systems and/or those with quirky usb.
533 */
534 timeout = msecs_to_jiffies(5);
535 set_current_state(TASK_UNINTERRUPTIBLE);
536 schedule_timeout(timeout);
537
538 return retval;
539 }
540
541 /**
542 * Sends an associate packet to the iMON 2.4G.
543 *
544 * This might not be such a good idea, since it has an id collision with
545 * some versions of the "IR & VFD" combo. The only way to determine if it
546 * is an RF version is to look at the product description string. (Which
547 * we currently do not fetch).
548 */
549 static int send_associate_24g(struct imon_context *ictx)
550 {
551 int retval;
552 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
553 0x00, 0x00, 0x00, 0x20 };
554
555 if (!ictx) {
556 pr_err("no context for device\n");
557 return -ENODEV;
558 }
559
560 if (!ictx->dev_present_intf0) {
561 pr_err("no iMON device present\n");
562 return -ENODEV;
563 }
564
565 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
566 retval = send_packet(ictx);
567
568 return retval;
569 }
570
571 /**
572 * Sends packets to setup and show clock on iMON display
573 *
574 * Arguments: year - last 2 digits of year, month - 1..12,
575 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
576 * hour - 0..23, minute - 0..59, second - 0..59
577 */
578 static int send_set_imon_clock(struct imon_context *ictx,
579 unsigned int year, unsigned int month,
580 unsigned int day, unsigned int dow,
581 unsigned int hour, unsigned int minute,
582 unsigned int second)
583 {
584 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
585 int retval = 0;
586 int i;
587
588 if (!ictx) {
589 pr_err("no context for device\n");
590 return -ENODEV;
591 }
592
593 switch (ictx->display_type) {
594 case IMON_DISPLAY_TYPE_LCD:
595 clock_enable_pkt[0][0] = 0x80;
596 clock_enable_pkt[0][1] = year;
597 clock_enable_pkt[0][2] = month-1;
598 clock_enable_pkt[0][3] = day;
599 clock_enable_pkt[0][4] = hour;
600 clock_enable_pkt[0][5] = minute;
601 clock_enable_pkt[0][6] = second;
602
603 clock_enable_pkt[1][0] = 0x80;
604 clock_enable_pkt[1][1] = 0;
605 clock_enable_pkt[1][2] = 0;
606 clock_enable_pkt[1][3] = 0;
607 clock_enable_pkt[1][4] = 0;
608 clock_enable_pkt[1][5] = 0;
609 clock_enable_pkt[1][6] = 0;
610
611 if (ictx->product == 0xffdc) {
612 clock_enable_pkt[0][7] = 0x50;
613 clock_enable_pkt[1][7] = 0x51;
614 } else {
615 clock_enable_pkt[0][7] = 0x88;
616 clock_enable_pkt[1][7] = 0x8a;
617 }
618
619 break;
620
621 case IMON_DISPLAY_TYPE_VFD:
622 clock_enable_pkt[0][0] = year;
623 clock_enable_pkt[0][1] = month-1;
624 clock_enable_pkt[0][2] = day;
625 clock_enable_pkt[0][3] = dow;
626 clock_enable_pkt[0][4] = hour;
627 clock_enable_pkt[0][5] = minute;
628 clock_enable_pkt[0][6] = second;
629 clock_enable_pkt[0][7] = 0x40;
630
631 clock_enable_pkt[1][0] = 0;
632 clock_enable_pkt[1][1] = 0;
633 clock_enable_pkt[1][2] = 1;
634 clock_enable_pkt[1][3] = 0;
635 clock_enable_pkt[1][4] = 0;
636 clock_enable_pkt[1][5] = 0;
637 clock_enable_pkt[1][6] = 0;
638 clock_enable_pkt[1][7] = 0x42;
639
640 break;
641
642 default:
643 return -ENODEV;
644 }
645
646 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
647 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
648 retval = send_packet(ictx);
649 if (retval) {
650 pr_err("send_packet failed for packet %d\n", i);
651 break;
652 }
653 }
654
655 return retval;
656 }
657
658 /**
659 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
660 */
661 static ssize_t show_associate_remote(struct device *d,
662 struct device_attribute *attr,
663 char *buf)
664 {
665 struct imon_context *ictx = dev_get_drvdata(d);
666
667 if (!ictx)
668 return -ENODEV;
669
670 mutex_lock(&ictx->lock);
671 if (ictx->rf_isassociating)
672 strcpy(buf, "associating\n");
673 else
674 strcpy(buf, "closed\n");
675
676 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
677 "instructions on how to associate your iMON 2.4G DT/LT "
678 "remote\n");
679 mutex_unlock(&ictx->lock);
680 return strlen(buf);
681 }
682
683 static ssize_t store_associate_remote(struct device *d,
684 struct device_attribute *attr,
685 const char *buf, size_t count)
686 {
687 struct imon_context *ictx;
688
689 ictx = dev_get_drvdata(d);
690
691 if (!ictx)
692 return -ENODEV;
693
694 mutex_lock(&ictx->lock);
695 ictx->rf_isassociating = true;
696 send_associate_24g(ictx);
697 mutex_unlock(&ictx->lock);
698
699 return count;
700 }
701
702 /**
703 * sysfs functions to control internal imon clock
704 */
705 static ssize_t show_imon_clock(struct device *d,
706 struct device_attribute *attr, char *buf)
707 {
708 struct imon_context *ictx = dev_get_drvdata(d);
709 size_t len;
710
711 if (!ictx)
712 return -ENODEV;
713
714 mutex_lock(&ictx->lock);
715
716 if (!ictx->display_supported) {
717 len = snprintf(buf, PAGE_SIZE, "Not supported.");
718 } else {
719 len = snprintf(buf, PAGE_SIZE,
720 "To set the clock on your iMON display:\n"
721 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
722 "%s", ictx->display_isopen ?
723 "\nNOTE: imon device must be closed\n" : "");
724 }
725
726 mutex_unlock(&ictx->lock);
727
728 return len;
729 }
730
731 static ssize_t store_imon_clock(struct device *d,
732 struct device_attribute *attr,
733 const char *buf, size_t count)
734 {
735 struct imon_context *ictx = dev_get_drvdata(d);
736 ssize_t retval;
737 unsigned int year, month, day, dow, hour, minute, second;
738
739 if (!ictx)
740 return -ENODEV;
741
742 mutex_lock(&ictx->lock);
743
744 if (!ictx->display_supported) {
745 retval = -ENODEV;
746 goto exit;
747 } else if (ictx->display_isopen) {
748 retval = -EBUSY;
749 goto exit;
750 }
751
752 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
753 &hour, &minute, &second) != 7) {
754 retval = -EINVAL;
755 goto exit;
756 }
757
758 if ((month < 1 || month > 12) ||
759 (day < 1 || day > 31) || (dow > 6) ||
760 (hour > 23) || (minute > 59) || (second > 59)) {
761 retval = -EINVAL;
762 goto exit;
763 }
764
765 retval = send_set_imon_clock(ictx, year, month, day, dow,
766 hour, minute, second);
767 if (retval)
768 goto exit;
769
770 retval = count;
771 exit:
772 mutex_unlock(&ictx->lock);
773
774 return retval;
775 }
776
777
778 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
779 store_imon_clock);
780
781 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
782 store_associate_remote);
783
784 static struct attribute *imon_display_sysfs_entries[] = {
785 &dev_attr_imon_clock.attr,
786 NULL
787 };
788
789 static struct attribute_group imon_display_attr_group = {
790 .attrs = imon_display_sysfs_entries
791 };
792
793 static struct attribute *imon_rf_sysfs_entries[] = {
794 &dev_attr_associate_remote.attr,
795 NULL
796 };
797
798 static struct attribute_group imon_rf_attr_group = {
799 .attrs = imon_rf_sysfs_entries
800 };
801
802 /**
803 * Writes data to the VFD. The iMON VFD is 2x16 characters
804 * and requires data in 5 consecutive USB interrupt packets,
805 * each packet but the last carrying 7 bytes.
806 *
807 * I don't know if the VFD board supports features such as
808 * scrolling, clearing rows, blanking, etc. so at
809 * the caller must provide a full screen of data. If fewer
810 * than 32 bytes are provided spaces will be appended to
811 * generate a full screen.
812 */
813 static ssize_t vfd_write(struct file *file, const char *buf,
814 size_t n_bytes, loff_t *pos)
815 {
816 int i;
817 int offset;
818 int seq;
819 int retval = 0;
820 struct imon_context *ictx;
821 const unsigned char vfd_packet6[] = {
822 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
823
824 ictx = file->private_data;
825 if (!ictx) {
826 pr_err("no context for device\n");
827 return -ENODEV;
828 }
829
830 mutex_lock(&ictx->lock);
831
832 if (!ictx->dev_present_intf0) {
833 pr_err("no iMON device present\n");
834 retval = -ENODEV;
835 goto exit;
836 }
837
838 if (n_bytes <= 0 || n_bytes > 32) {
839 pr_err("invalid payload size\n");
840 retval = -EINVAL;
841 goto exit;
842 }
843
844 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
845 retval = -EFAULT;
846 goto exit;
847 }
848
849 /* Pad with spaces */
850 for (i = n_bytes; i < 32; ++i)
851 ictx->tx.data_buf[i] = ' ';
852
853 for (i = 32; i < 35; ++i)
854 ictx->tx.data_buf[i] = 0xFF;
855
856 offset = 0;
857 seq = 0;
858
859 do {
860 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
861 ictx->usb_tx_buf[7] = (unsigned char) seq;
862
863 retval = send_packet(ictx);
864 if (retval) {
865 pr_err("send packet failed for packet #%d\n", seq / 2);
866 goto exit;
867 } else {
868 seq += 2;
869 offset += 7;
870 }
871
872 } while (offset < 35);
873
874 /* Send packet #6 */
875 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
876 ictx->usb_tx_buf[7] = (unsigned char) seq;
877 retval = send_packet(ictx);
878 if (retval)
879 pr_err("send packet failed for packet #%d\n", seq / 2);
880
881 exit:
882 mutex_unlock(&ictx->lock);
883
884 return (!retval) ? n_bytes : retval;
885 }
886
887 /**
888 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
889 * packets. We accept data as 16 hexadecimal digits, followed by a
890 * newline (to make it easy to drive the device from a command-line
891 * -- even though the actual binary data is a bit complicated).
892 *
893 * The device itself is not a "traditional" text-mode display. It's
894 * actually a 16x96 pixel bitmap display. That means if you want to
895 * display text, you've got to have your own "font" and translate the
896 * text into bitmaps for display. This is really flexible (you can
897 * display whatever diacritics you need, and so on), but it's also
898 * a lot more complicated than most LCDs...
899 */
900 static ssize_t lcd_write(struct file *file, const char *buf,
901 size_t n_bytes, loff_t *pos)
902 {
903 int retval = 0;
904 struct imon_context *ictx;
905
906 ictx = file->private_data;
907 if (!ictx) {
908 pr_err("no context for device\n");
909 return -ENODEV;
910 }
911
912 mutex_lock(&ictx->lock);
913
914 if (!ictx->display_supported) {
915 pr_err("no iMON display present\n");
916 retval = -ENODEV;
917 goto exit;
918 }
919
920 if (n_bytes != 8) {
921 pr_err("invalid payload size: %d (expected 8)\n", (int)n_bytes);
922 retval = -EINVAL;
923 goto exit;
924 }
925
926 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
927 retval = -EFAULT;
928 goto exit;
929 }
930
931 retval = send_packet(ictx);
932 if (retval) {
933 pr_err("send packet failed!\n");
934 goto exit;
935 } else {
936 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
937 __func__, (int) n_bytes);
938 }
939 exit:
940 mutex_unlock(&ictx->lock);
941 return (!retval) ? n_bytes : retval;
942 }
943
944 /**
945 * Callback function for USB core API: transmit data
946 */
947 static void usb_tx_callback(struct urb *urb)
948 {
949 struct imon_context *ictx;
950
951 if (!urb)
952 return;
953 ictx = (struct imon_context *)urb->context;
954 if (!ictx)
955 return;
956
957 ictx->tx.status = urb->status;
958
959 /* notify waiters that write has finished */
960 ictx->tx.busy = false;
961 smp_rmb(); /* ensure later readers know we're not busy */
962 complete(&ictx->tx.finished);
963 }
964
965 /**
966 * report touchscreen input
967 */
968 static void imon_touch_display_timeout(unsigned long data)
969 {
970 struct imon_context *ictx = (struct imon_context *)data;
971
972 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
973 return;
974
975 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
976 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
977 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
978 input_sync(ictx->touch);
979 }
980
981 /**
982 * iMON IR receivers support two different signal sets -- those used by
983 * the iMON remotes, and those used by the Windows MCE remotes (which is
984 * really just RC-6), but only one or the other at a time, as the signals
985 * are decoded onboard the receiver.
986 */
987 int imon_ir_change_protocol(void *priv, u64 ir_type)
988 {
989 int retval;
990 struct imon_context *ictx = priv;
991 struct device *dev = ictx->dev;
992 bool pad_mouse;
993 unsigned char ir_proto_packet[] = {
994 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
995
996 if (ir_type && !(ir_type & ictx->props->allowed_protos))
997 dev_warn(dev, "Looks like you're trying to use an IR protocol "
998 "this device does not support\n");
999
1000 switch (ir_type) {
1001 case IR_TYPE_RC6:
1002 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1003 ir_proto_packet[0] = 0x01;
1004 pad_mouse = false;
1005 break;
1006 case IR_TYPE_UNKNOWN:
1007 case IR_TYPE_OTHER:
1008 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1009 if (pad_stabilize && !nomouse)
1010 pad_mouse = true;
1011 else {
1012 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1013 pad_mouse = false;
1014 }
1015 /* ir_proto_packet[0] = 0x00; // already the default */
1016 ir_type = IR_TYPE_OTHER;
1017 break;
1018 default:
1019 dev_warn(dev, "Unsupported IR protocol specified, overriding "
1020 "to iMON IR protocol\n");
1021 if (pad_stabilize && !nomouse)
1022 pad_mouse = true;
1023 else {
1024 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1025 pad_mouse = false;
1026 }
1027 /* ir_proto_packet[0] = 0x00; // already the default */
1028 ir_type = IR_TYPE_OTHER;
1029 break;
1030 }
1031
1032 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1033
1034 retval = send_packet(ictx);
1035 if (retval)
1036 goto out;
1037
1038 ictx->ir_type = ir_type;
1039 ictx->pad_mouse = pad_mouse;
1040
1041 out:
1042 return retval;
1043 }
1044
1045 static inline int tv2int(const struct timeval *a, const struct timeval *b)
1046 {
1047 int usecs = 0;
1048 int sec = 0;
1049
1050 if (b->tv_usec > a->tv_usec) {
1051 usecs = 1000000;
1052 sec--;
1053 }
1054
1055 usecs += a->tv_usec - b->tv_usec;
1056
1057 sec += a->tv_sec - b->tv_sec;
1058 sec *= 1000;
1059 usecs /= 1000;
1060 sec += usecs;
1061
1062 if (sec < 0)
1063 sec = 1000;
1064
1065 return sec;
1066 }
1067
1068 /**
1069 * The directional pad behaves a bit differently, depending on whether this is
1070 * one of the older ffdc devices or a newer device. Newer devices appear to
1071 * have a higher resolution matrix for more precise mouse movement, but it
1072 * makes things overly sensitive in keyboard mode, so we do some interesting
1073 * contortions to make it less touchy. Older devices run through the same
1074 * routine with shorter timeout and a smaller threshold.
1075 */
1076 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1077 {
1078 struct timeval ct;
1079 static struct timeval prev_time = {0, 0};
1080 static struct timeval hit_time = {0, 0};
1081 static int x, y, prev_result, hits;
1082 int result = 0;
1083 int msec, msec_hit;
1084
1085 do_gettimeofday(&ct);
1086 msec = tv2int(&ct, &prev_time);
1087 msec_hit = tv2int(&ct, &hit_time);
1088
1089 if (msec > 100) {
1090 x = 0;
1091 y = 0;
1092 hits = 0;
1093 }
1094
1095 x += a;
1096 y += b;
1097
1098 prev_time = ct;
1099
1100 if (abs(x) > threshold || abs(y) > threshold) {
1101 if (abs(y) > abs(x))
1102 result = (y > 0) ? 0x7F : 0x80;
1103 else
1104 result = (x > 0) ? 0x7F00 : 0x8000;
1105
1106 x = 0;
1107 y = 0;
1108
1109 if (result == prev_result) {
1110 hits++;
1111
1112 if (hits > 3) {
1113 switch (result) {
1114 case 0x7F:
1115 y = 17 * threshold / 30;
1116 break;
1117 case 0x80:
1118 y -= 17 * threshold / 30;
1119 break;
1120 case 0x7F00:
1121 x = 17 * threshold / 30;
1122 break;
1123 case 0x8000:
1124 x -= 17 * threshold / 30;
1125 break;
1126 }
1127 }
1128
1129 if (hits == 2 && msec_hit < timeout) {
1130 result = 0;
1131 hits = 1;
1132 }
1133 } else {
1134 prev_result = result;
1135 hits = 1;
1136 hit_time = ct;
1137 }
1138 }
1139
1140 return result;
1141 }
1142
1143 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1144 {
1145 u32 keycode;
1146 u32 release;
1147 bool is_release_code = false;
1148
1149 /* Look for the initial press of a button */
1150 keycode = ir_g_keycode_from_table(ictx->rdev, scancode);
1151 ictx->rc_toggle = 0x0;
1152 ictx->rc_scancode = scancode;
1153
1154 /* Look for the release of a button */
1155 if (keycode == KEY_RESERVED) {
1156 release = scancode & ~0x4000;
1157 keycode = ir_g_keycode_from_table(ictx->rdev, release);
1158 if (keycode != KEY_RESERVED)
1159 is_release_code = true;
1160 }
1161
1162 ictx->release_code = is_release_code;
1163
1164 return keycode;
1165 }
1166
1167 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1168 {
1169 u32 keycode;
1170
1171 #define MCE_KEY_MASK 0x7000
1172 #define MCE_TOGGLE_BIT 0x8000
1173
1174 /*
1175 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1176 * (the toggle bit flipping between alternating key presses), while
1177 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1178 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1179 * but we can't or them into all codes, as some keys are decoded in
1180 * a different way w/o the same use of the toggle bit...
1181 */
1182 if (scancode & 0x80000000)
1183 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1184
1185 ictx->rc_scancode = scancode;
1186 keycode = ir_g_keycode_from_table(ictx->rdev, scancode);
1187
1188 /* not used in mce mode, but make sure we know its false */
1189 ictx->release_code = false;
1190
1191 return keycode;
1192 }
1193
1194 static u32 imon_panel_key_lookup(u64 code)
1195 {
1196 int i;
1197 u32 keycode = KEY_RESERVED;
1198
1199 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1200 if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
1201 keycode = imon_panel_key_table[i].keycode;
1202 break;
1203 }
1204 }
1205
1206 return keycode;
1207 }
1208
1209 static bool imon_mouse_event(struct imon_context *ictx,
1210 unsigned char *buf, int len)
1211 {
1212 char rel_x = 0x00, rel_y = 0x00;
1213 u8 right_shift = 1;
1214 bool mouse_input = true;
1215 int dir = 0;
1216 unsigned long flags;
1217
1218 spin_lock_irqsave(&ictx->kc_lock, flags);
1219
1220 /* newer iMON device PAD or mouse button */
1221 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1222 rel_x = buf[2];
1223 rel_y = buf[3];
1224 right_shift = 1;
1225 /* 0xffdc iMON PAD or mouse button input */
1226 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1227 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1228 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1229 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1230 if (buf[0] & 0x02)
1231 rel_x |= ~0x0f;
1232 rel_x = rel_x + rel_x / 2;
1233 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1234 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1235 if (buf[0] & 0x01)
1236 rel_y |= ~0x0f;
1237 rel_y = rel_y + rel_y / 2;
1238 right_shift = 2;
1239 /* some ffdc devices decode mouse buttons differently... */
1240 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1241 right_shift = 2;
1242 /* ch+/- buttons, which we use for an emulated scroll wheel */
1243 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1244 dir = 1;
1245 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1246 dir = -1;
1247 } else
1248 mouse_input = false;
1249
1250 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1251
1252 if (mouse_input) {
1253 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1254
1255 if (dir) {
1256 input_report_rel(ictx->idev, REL_WHEEL, dir);
1257 } else if (rel_x || rel_y) {
1258 input_report_rel(ictx->idev, REL_X, rel_x);
1259 input_report_rel(ictx->idev, REL_Y, rel_y);
1260 } else {
1261 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1262 input_report_key(ictx->idev, BTN_RIGHT,
1263 buf[1] >> right_shift & 0x1);
1264 }
1265 input_sync(ictx->idev);
1266 spin_lock_irqsave(&ictx->kc_lock, flags);
1267 ictx->last_keycode = ictx->kc;
1268 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1269 }
1270
1271 return mouse_input;
1272 }
1273
1274 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1275 {
1276 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1277 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1278 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1279 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1280 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1281 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1282 input_sync(ictx->touch);
1283 }
1284
1285 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1286 {
1287 int dir = 0;
1288 char rel_x = 0x00, rel_y = 0x00;
1289 u16 timeout, threshold;
1290 u32 scancode = KEY_RESERVED;
1291 unsigned long flags;
1292
1293 /*
1294 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1295 * contain a position coordinate (x,y), with each component ranging
1296 * from -14 to 14. We want to down-sample this to only 4 discrete values
1297 * for up/down/left/right arrow keys. Also, when you get too close to
1298 * diagonals, it has a tendancy to jump back and forth, so lets try to
1299 * ignore when they get too close.
1300 */
1301 if (ictx->product != 0xffdc) {
1302 /* first, pad to 8 bytes so it conforms with everything else */
1303 buf[5] = buf[6] = buf[7] = 0;
1304 timeout = 500; /* in msecs */
1305 /* (2*threshold) x (2*threshold) square */
1306 threshold = pad_thresh ? pad_thresh : 28;
1307 rel_x = buf[2];
1308 rel_y = buf[3];
1309
1310 if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
1311 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1312 dir = stabilize((int)rel_x, (int)rel_y,
1313 timeout, threshold);
1314 if (!dir) {
1315 spin_lock_irqsave(&ictx->kc_lock,
1316 flags);
1317 ictx->kc = KEY_UNKNOWN;
1318 spin_unlock_irqrestore(&ictx->kc_lock,
1319 flags);
1320 return;
1321 }
1322 buf[2] = dir & 0xFF;
1323 buf[3] = (dir >> 8) & 0xFF;
1324 scancode = be32_to_cpu(*((u32 *)buf));
1325 }
1326 } else {
1327 /*
1328 * Hack alert: instead of using keycodes, we have
1329 * to use hard-coded scancodes here...
1330 */
1331 if (abs(rel_y) > abs(rel_x)) {
1332 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1333 buf[3] = 0;
1334 if (rel_y > 0)
1335 scancode = 0x01007f00; /* KEY_DOWN */
1336 else
1337 scancode = 0x01008000; /* KEY_UP */
1338 } else {
1339 buf[2] = 0;
1340 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1341 if (rel_x > 0)
1342 scancode = 0x0100007f; /* KEY_RIGHT */
1343 else
1344 scancode = 0x01000080; /* KEY_LEFT */
1345 }
1346 }
1347
1348 /*
1349 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1350 * device (15c2:ffdc). The remote generates various codes from
1351 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1352 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1353 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1354 * reversed endianess. Extract direction from buffer, rotate endianess,
1355 * adjust sign and feed the values into stabilize(). The resulting codes
1356 * will be 0x01008000, 0x01007F00, which match the newer devices.
1357 */
1358 } else {
1359 timeout = 10; /* in msecs */
1360 /* (2*threshold) x (2*threshold) square */
1361 threshold = pad_thresh ? pad_thresh : 15;
1362
1363 /* buf[1] is x */
1364 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1365 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1366 if (buf[0] & 0x02)
1367 rel_x |= ~0x10+1;
1368 /* buf[2] is y */
1369 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1370 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1371 if (buf[0] & 0x01)
1372 rel_y |= ~0x10+1;
1373
1374 buf[0] = 0x01;
1375 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1376
1377 if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
1378 dir = stabilize((int)rel_x, (int)rel_y,
1379 timeout, threshold);
1380 if (!dir) {
1381 spin_lock_irqsave(&ictx->kc_lock, flags);
1382 ictx->kc = KEY_UNKNOWN;
1383 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1384 return;
1385 }
1386 buf[2] = dir & 0xFF;
1387 buf[3] = (dir >> 8) & 0xFF;
1388 scancode = be32_to_cpu(*((u32 *)buf));
1389 } else {
1390 /*
1391 * Hack alert: instead of using keycodes, we have
1392 * to use hard-coded scancodes here...
1393 */
1394 if (abs(rel_y) > abs(rel_x)) {
1395 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1396 buf[3] = 0;
1397 if (rel_y > 0)
1398 scancode = 0x01007f00; /* KEY_DOWN */
1399 else
1400 scancode = 0x01008000; /* KEY_UP */
1401 } else {
1402 buf[2] = 0;
1403 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1404 if (rel_x > 0)
1405 scancode = 0x0100007f; /* KEY_RIGHT */
1406 else
1407 scancode = 0x01000080; /* KEY_LEFT */
1408 }
1409 }
1410 }
1411
1412 if (scancode) {
1413 spin_lock_irqsave(&ictx->kc_lock, flags);
1414 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1415 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1416 }
1417 }
1418
1419 /**
1420 * figure out if these is a press or a release. We don't actually
1421 * care about repeats, as those will be auto-generated within the IR
1422 * subsystem for repeating scancodes.
1423 */
1424 static int imon_parse_press_type(struct imon_context *ictx,
1425 unsigned char *buf, u8 ktype)
1426 {
1427 int press_type = 0;
1428 unsigned long flags;
1429
1430 spin_lock_irqsave(&ictx->kc_lock, flags);
1431
1432 /* key release of 0x02XXXXXX key */
1433 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1434 ictx->kc = ictx->last_keycode;
1435
1436 /* mouse button release on (some) 0xffdc devices */
1437 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1438 buf[2] == 0x81 && buf[3] == 0xb7)
1439 ictx->kc = ictx->last_keycode;
1440
1441 /* mouse button release on (some other) 0xffdc devices */
1442 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1443 buf[2] == 0x81 && buf[3] == 0xb7)
1444 ictx->kc = ictx->last_keycode;
1445
1446 /* mce-specific button handling, no keyup events */
1447 else if (ktype == IMON_KEY_MCE) {
1448 ictx->rc_toggle = buf[2];
1449 press_type = 1;
1450
1451 /* incoherent or irrelevant data */
1452 } else if (ictx->kc == KEY_RESERVED)
1453 press_type = -EINVAL;
1454
1455 /* key release of 0xXXXXXXb7 key */
1456 else if (ictx->release_code)
1457 press_type = 0;
1458
1459 /* this is a button press */
1460 else
1461 press_type = 1;
1462
1463 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1464
1465 return press_type;
1466 }
1467
1468 /**
1469 * Process the incoming packet
1470 */
1471 static void imon_incoming_packet(struct imon_context *ictx,
1472 struct urb *urb, int intf)
1473 {
1474 int len = urb->actual_length;
1475 unsigned char *buf = urb->transfer_buffer;
1476 struct device *dev = ictx->dev;
1477 unsigned long flags;
1478 u32 kc;
1479 bool norelease = false;
1480 int i;
1481 u64 scancode;
1482 struct input_dev *rdev = NULL;
1483 struct ir_input_dev *irdev = NULL;
1484 int press_type = 0;
1485 int msec;
1486 struct timeval t;
1487 static struct timeval prev_time = { 0, 0 };
1488 u8 ktype;
1489
1490 rdev = ictx->rdev;
1491 irdev = input_get_drvdata(rdev);
1492
1493 /* filter out junk data on the older 0xffdc imon devices */
1494 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1495 return;
1496
1497 /* Figure out what key was pressed */
1498 if (len == 8 && buf[7] == 0xee) {
1499 scancode = be64_to_cpu(*((u64 *)buf));
1500 ktype = IMON_KEY_PANEL;
1501 kc = imon_panel_key_lookup(scancode);
1502 } else {
1503 scancode = be32_to_cpu(*((u32 *)buf));
1504 if (ictx->ir_type == IR_TYPE_RC6) {
1505 ktype = IMON_KEY_IMON;
1506 if (buf[0] == 0x80)
1507 ktype = IMON_KEY_MCE;
1508 kc = imon_mce_key_lookup(ictx, scancode);
1509 } else {
1510 ktype = IMON_KEY_IMON;
1511 kc = imon_remote_key_lookup(ictx, scancode);
1512 }
1513 }
1514
1515 spin_lock_irqsave(&ictx->kc_lock, flags);
1516 /* keyboard/mouse mode toggle button */
1517 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1518 ictx->last_keycode = kc;
1519 if (!nomouse) {
1520 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1521 dev_dbg(dev, "toggling to %s mode\n",
1522 ictx->pad_mouse ? "mouse" : "keyboard");
1523 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1524 return;
1525 } else {
1526 ictx->pad_mouse = 0;
1527 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1528 }
1529 }
1530
1531 ictx->kc = kc;
1532 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1533
1534 /* send touchscreen events through input subsystem if touchpad data */
1535 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1536 buf[7] == 0x86) {
1537 imon_touch_event(ictx, buf);
1538 return;
1539
1540 /* look for mouse events with pad in mouse mode */
1541 } else if (ictx->pad_mouse) {
1542 if (imon_mouse_event(ictx, buf, len))
1543 return;
1544 }
1545
1546 /* Now for some special handling to convert pad input to arrow keys */
1547 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1548 ((len == 8) && (buf[0] & 0x40) &&
1549 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1550 len = 8;
1551 imon_pad_to_keys(ictx, buf);
1552 norelease = true;
1553 }
1554
1555 if (debug) {
1556 printk(KERN_INFO "intf%d decoded packet: ", intf);
1557 for (i = 0; i < len; ++i)
1558 printk("%02x ", buf[i]);
1559 printk("\n");
1560 }
1561
1562 press_type = imon_parse_press_type(ictx, buf, ktype);
1563 if (press_type < 0)
1564 goto not_input_data;
1565
1566 spin_lock_irqsave(&ictx->kc_lock, flags);
1567 if (ictx->kc == KEY_UNKNOWN)
1568 goto unknown_key;
1569 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1570
1571 if (ktype != IMON_KEY_PANEL) {
1572 if (press_type == 0)
1573 ir_keyup(irdev);
1574 else {
1575 ir_keydown(rdev, ictx->rc_scancode, ictx->rc_toggle);
1576 spin_lock_irqsave(&ictx->kc_lock, flags);
1577 ictx->last_keycode = ictx->kc;
1578 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1579 }
1580 return;
1581 }
1582
1583 /* Only panel type events left to process now */
1584 spin_lock_irqsave(&ictx->kc_lock, flags);
1585
1586 /* KEY_MUTE repeats from knob need to be suppressed */
1587 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1588 do_gettimeofday(&t);
1589 msec = tv2int(&t, &prev_time);
1590 prev_time = t;
1591 if (msec < ictx->idev->rep[REP_DELAY]) {
1592 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1593 return;
1594 }
1595 }
1596 kc = ictx->kc;
1597
1598 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1599
1600 input_report_key(ictx->idev, kc, press_type);
1601 input_sync(ictx->idev);
1602
1603 /* panel keys don't generate a release */
1604 input_report_key(ictx->idev, kc, 0);
1605 input_sync(ictx->idev);
1606
1607 ictx->last_keycode = kc;
1608
1609 return;
1610
1611 unknown_key:
1612 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1613 dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
1614 (long long)scancode);
1615 return;
1616
1617 not_input_data:
1618 if (len != 8) {
1619 dev_warn(dev, "imon %s: invalid incoming packet "
1620 "size (len = %d, intf%d)\n", __func__, len, intf);
1621 return;
1622 }
1623
1624 /* iMON 2.4G associate frame */
1625 if (buf[0] == 0x00 &&
1626 buf[2] == 0xFF && /* REFID */
1627 buf[3] == 0xFF &&
1628 buf[4] == 0xFF &&
1629 buf[5] == 0xFF && /* iMON 2.4G */
1630 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1631 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1632 dev_warn(dev, "%s: remote associated refid=%02X\n",
1633 __func__, buf[1]);
1634 ictx->rf_isassociating = false;
1635 }
1636 }
1637
1638 /**
1639 * Callback function for USB core API: receive data
1640 */
1641 static void usb_rx_callback_intf0(struct urb *urb)
1642 {
1643 struct imon_context *ictx;
1644 int intfnum = 0;
1645
1646 if (!urb)
1647 return;
1648
1649 ictx = (struct imon_context *)urb->context;
1650 if (!ictx)
1651 return;
1652
1653 switch (urb->status) {
1654 case -ENOENT: /* usbcore unlink successful! */
1655 return;
1656
1657 case -ESHUTDOWN: /* transport endpoint was shut down */
1658 break;
1659
1660 case 0:
1661 imon_incoming_packet(ictx, urb, intfnum);
1662 break;
1663
1664 default:
1665 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1666 __func__, urb->status);
1667 break;
1668 }
1669
1670 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1671 }
1672
1673 static void usb_rx_callback_intf1(struct urb *urb)
1674 {
1675 struct imon_context *ictx;
1676 int intfnum = 1;
1677
1678 if (!urb)
1679 return;
1680
1681 ictx = (struct imon_context *)urb->context;
1682 if (!ictx)
1683 return;
1684
1685 switch (urb->status) {
1686 case -ENOENT: /* usbcore unlink successful! */
1687 return;
1688
1689 case -ESHUTDOWN: /* transport endpoint was shut down */
1690 break;
1691
1692 case 0:
1693 imon_incoming_packet(ictx, urb, intfnum);
1694 break;
1695
1696 default:
1697 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1698 __func__, urb->status);
1699 break;
1700 }
1701
1702 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1703 }
1704
1705 /*
1706 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1707 * devices, and all of them constantly spew interrupts, even when there
1708 * is no actual data to report. However, byte 6 of this buffer looks like
1709 * its unique across device variants, so we're trying to key off that to
1710 * figure out which display type (if any) and what IR protocol the device
1711 * actually supports. These devices have their IR protocol hard-coded into
1712 * their firmware, they can't be changed on the fly like the newer hardware.
1713 */
1714 static void imon_get_ffdc_type(struct imon_context *ictx)
1715 {
1716 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1717 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1718 u64 allowed_protos = IR_TYPE_OTHER;
1719
1720 switch (ffdc_cfg_byte) {
1721 /* iMON Knob, no display, iMON IR + vol knob */
1722 case 0x21:
1723 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1724 ictx->display_supported = false;
1725 break;
1726 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1727 case 0x4e:
1728 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1729 ictx->display_supported = false;
1730 ictx->rf_device = true;
1731 break;
1732 /* iMON VFD, no IR (does have vol knob tho) */
1733 case 0x35:
1734 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1735 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1736 break;
1737 /* iMON VFD, iMON IR */
1738 case 0x24:
1739 case 0x85:
1740 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1741 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1742 break;
1743 /* iMON VFD, MCE IR */
1744 case 0x9e:
1745 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1746 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1747 allowed_protos = IR_TYPE_RC6;
1748 break;
1749 /* iMON LCD, MCE IR */
1750 case 0x9f:
1751 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1752 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1753 allowed_protos = IR_TYPE_RC6;
1754 break;
1755 default:
1756 dev_info(ictx->dev, "Unknown 0xffdc device, "
1757 "defaulting to VFD and iMON IR");
1758 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1759 break;
1760 }
1761
1762 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1763
1764 ictx->display_type = detected_display_type;
1765 ictx->props->allowed_protos = allowed_protos;
1766 ictx->ir_type = allowed_protos;
1767 }
1768
1769 static void imon_set_display_type(struct imon_context *ictx)
1770 {
1771 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1772
1773 /*
1774 * Try to auto-detect the type of display if the user hasn't set
1775 * it by hand via the display_type modparam. Default is VFD.
1776 */
1777
1778 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1779 switch (ictx->product) {
1780 case 0xffdc:
1781 /* set in imon_get_ffdc_type() */
1782 configured_display_type = ictx->display_type;
1783 break;
1784 case 0x0034:
1785 case 0x0035:
1786 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1787 break;
1788 case 0x0038:
1789 case 0x0039:
1790 case 0x0045:
1791 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1792 break;
1793 case 0x003c:
1794 case 0x0041:
1795 case 0x0042:
1796 case 0x0043:
1797 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1798 ictx->display_supported = false;
1799 break;
1800 case 0x0036:
1801 case 0x0044:
1802 default:
1803 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1804 break;
1805 }
1806 } else {
1807 configured_display_type = display_type;
1808 if (display_type == IMON_DISPLAY_TYPE_NONE)
1809 ictx->display_supported = false;
1810 else
1811 ictx->display_supported = true;
1812 dev_info(ictx->dev, "%s: overriding display type to %d via "
1813 "modparam\n", __func__, display_type);
1814 }
1815
1816 ictx->display_type = configured_display_type;
1817 }
1818
1819 static struct input_dev *imon_init_rdev(struct imon_context *ictx)
1820 {
1821 struct input_dev *rdev;
1822 struct ir_dev_props *props;
1823 int ret;
1824 char *ir_codes = NULL;
1825 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
1826 0x00, 0x00, 0x00, 0x88 };
1827
1828 rdev = input_allocate_device();
1829 props = kzalloc(sizeof(*props), GFP_KERNEL);
1830 if (!rdev || !props) {
1831 dev_err(ictx->dev, "remote control dev allocation failed\n");
1832 goto out;
1833 }
1834
1835 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1836 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1837 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1838 sizeof(ictx->phys_rdev));
1839 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1840
1841 rdev->name = ictx->name_rdev;
1842 rdev->phys = ictx->phys_rdev;
1843 usb_to_input_id(ictx->usbdev_intf0, &rdev->id);
1844 rdev->dev.parent = ictx->dev;
1845 rdev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
1846 input_set_drvdata(rdev, ictx);
1847
1848 props->priv = ictx;
1849 props->driver_type = RC_DRIVER_SCANCODE;
1850 props->allowed_protos = IR_TYPE_OTHER | IR_TYPE_RC6; /* iMON PAD or MCE */
1851 props->change_protocol = imon_ir_change_protocol;
1852 ictx->props = props;
1853
1854 /* Enable front-panel buttons and/or knobs */
1855 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1856 ret = send_packet(ictx);
1857 /* Not fatal, but warn about it */
1858 if (ret)
1859 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1860
1861 if (ictx->product == 0xffdc)
1862 imon_get_ffdc_type(ictx);
1863
1864 imon_set_display_type(ictx);
1865
1866 if (ictx->ir_type == IR_TYPE_RC6)
1867 ir_codes = RC_MAP_IMON_MCE;
1868 else
1869 ir_codes = RC_MAP_IMON_PAD;
1870
1871 ret = ir_input_register(rdev, ir_codes, props, MOD_NAME);
1872 if (ret < 0) {
1873 dev_err(ictx->dev, "remote input dev register failed\n");
1874 goto out;
1875 }
1876
1877 return rdev;
1878
1879 out:
1880 kfree(props);
1881 input_free_device(rdev);
1882 return NULL;
1883 }
1884
1885 static struct input_dev *imon_init_idev(struct imon_context *ictx)
1886 {
1887 struct input_dev *idev;
1888 int ret, i;
1889
1890 idev = input_allocate_device();
1891 if (!idev) {
1892 dev_err(ictx->dev, "input dev allocation failed\n");
1893 goto out;
1894 }
1895
1896 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1897 "iMON Panel, Knob and Mouse(%04x:%04x)",
1898 ictx->vendor, ictx->product);
1899 idev->name = ictx->name_idev;
1900
1901 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
1902 sizeof(ictx->phys_idev));
1903 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
1904 idev->phys = ictx->phys_idev;
1905
1906 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
1907
1908 idev->keybit[BIT_WORD(BTN_MOUSE)] =
1909 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1910 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
1911 BIT_MASK(REL_WHEEL);
1912
1913 /* panel and/or knob code support */
1914 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1915 u32 kc = imon_panel_key_table[i].keycode;
1916 __set_bit(kc, idev->keybit);
1917 }
1918
1919 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
1920 idev->dev.parent = ictx->dev;
1921 input_set_drvdata(idev, ictx);
1922
1923 ret = input_register_device(idev);
1924 if (ret < 0) {
1925 dev_err(ictx->dev, "input dev register failed\n");
1926 goto out;
1927 }
1928
1929 return idev;
1930
1931 out:
1932 input_free_device(idev);
1933 return NULL;
1934 }
1935
1936 static struct input_dev *imon_init_touch(struct imon_context *ictx)
1937 {
1938 struct input_dev *touch;
1939 int ret;
1940
1941 touch = input_allocate_device();
1942 if (!touch) {
1943 dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
1944 goto touch_alloc_failed;
1945 }
1946
1947 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
1948 "iMON USB Touchscreen (%04x:%04x)",
1949 ictx->vendor, ictx->product);
1950 touch->name = ictx->name_touch;
1951
1952 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
1953 sizeof(ictx->phys_touch));
1954 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
1955 touch->phys = ictx->phys_touch;
1956
1957 touch->evbit[0] =
1958 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1959 touch->keybit[BIT_WORD(BTN_TOUCH)] =
1960 BIT_MASK(BTN_TOUCH);
1961 input_set_abs_params(touch, ABS_X,
1962 0x00, 0xfff, 0, 0);
1963 input_set_abs_params(touch, ABS_Y,
1964 0x00, 0xfff, 0, 0);
1965
1966 input_set_drvdata(touch, ictx);
1967
1968 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
1969 touch->dev.parent = ictx->dev;
1970 ret = input_register_device(touch);
1971 if (ret < 0) {
1972 dev_info(ictx->dev, "touchscreen input dev register failed\n");
1973 goto touch_register_failed;
1974 }
1975
1976 return touch;
1977
1978 touch_register_failed:
1979 input_free_device(ictx->touch);
1980
1981 touch_alloc_failed:
1982 return NULL;
1983 }
1984
1985 static bool imon_find_endpoints(struct imon_context *ictx,
1986 struct usb_host_interface *iface_desc)
1987 {
1988 struct usb_endpoint_descriptor *ep;
1989 struct usb_endpoint_descriptor *rx_endpoint = NULL;
1990 struct usb_endpoint_descriptor *tx_endpoint = NULL;
1991 int ifnum = iface_desc->desc.bInterfaceNumber;
1992 int num_endpts = iface_desc->desc.bNumEndpoints;
1993 int i, ep_dir, ep_type;
1994 bool ir_ep_found = false;
1995 bool display_ep_found = false;
1996 bool tx_control = false;
1997
1998 /*
1999 * Scan the endpoint list and set:
2000 * first input endpoint = IR endpoint
2001 * first output endpoint = display endpoint
2002 */
2003 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2004 ep = &iface_desc->endpoint[i].desc;
2005 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2006 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
2007
2008 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2009 ep_type == USB_ENDPOINT_XFER_INT) {
2010
2011 rx_endpoint = ep;
2012 ir_ep_found = true;
2013 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2014
2015 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2016 ep_type == USB_ENDPOINT_XFER_INT) {
2017 tx_endpoint = ep;
2018 display_ep_found = true;
2019 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2020 }
2021 }
2022
2023 if (ifnum == 0) {
2024 ictx->rx_endpoint_intf0 = rx_endpoint;
2025 /*
2026 * tx is used to send characters to lcd/vfd, associate RF
2027 * remotes, set IR protocol, and maybe more...
2028 */
2029 ictx->tx_endpoint = tx_endpoint;
2030 } else {
2031 ictx->rx_endpoint_intf1 = rx_endpoint;
2032 }
2033
2034 /*
2035 * If we didn't find a display endpoint, this is probably one of the
2036 * newer iMON devices that use control urb instead of interrupt
2037 */
2038 if (!display_ep_found) {
2039 tx_control = true;
2040 display_ep_found = true;
2041 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
2042 "interface OUT endpoint\n", __func__);
2043 }
2044
2045 /*
2046 * Some iMON receivers have no display. Unfortunately, it seems
2047 * that SoundGraph recycles device IDs between devices both with
2048 * and without... :\
2049 */
2050 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2051 display_ep_found = false;
2052 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2053 }
2054
2055 /*
2056 * iMON Touch devices have a VGA touchscreen, but no "display", as
2057 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2058 */
2059 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2060 display_ep_found = false;
2061 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2062 }
2063
2064 /* Input endpoint is mandatory */
2065 if (!ir_ep_found)
2066 pr_err("no valid input (IR) endpoint found\n");
2067
2068 ictx->tx_control = tx_control;
2069
2070 if (display_ep_found)
2071 ictx->display_supported = true;
2072
2073 return ir_ep_found;
2074
2075 }
2076
2077 static struct imon_context *imon_init_intf0(struct usb_interface *intf)
2078 {
2079 struct imon_context *ictx;
2080 struct urb *rx_urb;
2081 struct urb *tx_urb;
2082 struct device *dev = &intf->dev;
2083 struct usb_host_interface *iface_desc;
2084 int ret = -ENOMEM;
2085
2086 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
2087 if (!ictx) {
2088 dev_err(dev, "%s: kzalloc failed for context", __func__);
2089 goto exit;
2090 }
2091 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2092 if (!rx_urb) {
2093 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
2094 goto rx_urb_alloc_failed;
2095 }
2096 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2097 if (!tx_urb) {
2098 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
2099 __func__);
2100 goto tx_urb_alloc_failed;
2101 }
2102
2103 mutex_init(&ictx->lock);
2104 spin_lock_init(&ictx->kc_lock);
2105
2106 mutex_lock(&ictx->lock);
2107
2108 ictx->dev = dev;
2109 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2110 ictx->dev_present_intf0 = true;
2111 ictx->rx_urb_intf0 = rx_urb;
2112 ictx->tx_urb = tx_urb;
2113 ictx->rf_device = false;
2114
2115 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2116 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2117
2118 ret = -ENODEV;
2119 iface_desc = intf->cur_altsetting;
2120 if (!imon_find_endpoints(ictx, iface_desc)) {
2121 goto find_endpoint_failed;
2122 }
2123
2124 ictx->idev = imon_init_idev(ictx);
2125 if (!ictx->idev) {
2126 dev_err(dev, "%s: input device setup failed\n", __func__);
2127 goto idev_setup_failed;
2128 }
2129
2130 ictx->rdev = imon_init_rdev(ictx);
2131 if (!ictx->rdev) {
2132 dev_err(dev, "%s: rc device setup failed\n", __func__);
2133 goto rdev_setup_failed;
2134 }
2135
2136 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2137 usb_rcvintpipe(ictx->usbdev_intf0,
2138 ictx->rx_endpoint_intf0->bEndpointAddress),
2139 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2140 usb_rx_callback_intf0, ictx,
2141 ictx->rx_endpoint_intf0->bInterval);
2142
2143 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2144 if (ret) {
2145 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2146 goto urb_submit_failed;
2147 }
2148
2149 return ictx;
2150
2151 urb_submit_failed:
2152 ir_input_unregister(ictx->rdev);
2153 rdev_setup_failed:
2154 input_unregister_device(ictx->idev);
2155 idev_setup_failed:
2156 find_endpoint_failed:
2157 mutex_unlock(&ictx->lock);
2158 usb_free_urb(tx_urb);
2159 tx_urb_alloc_failed:
2160 usb_free_urb(rx_urb);
2161 rx_urb_alloc_failed:
2162 kfree(ictx);
2163 exit:
2164 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2165
2166 return NULL;
2167 }
2168
2169 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2170 struct imon_context *ictx)
2171 {
2172 struct urb *rx_urb;
2173 struct usb_host_interface *iface_desc;
2174 int ret = -ENOMEM;
2175
2176 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2177 if (!rx_urb) {
2178 pr_err("usb_alloc_urb failed for IR urb\n");
2179 goto rx_urb_alloc_failed;
2180 }
2181
2182 mutex_lock(&ictx->lock);
2183
2184 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2185 init_timer(&ictx->ttimer);
2186 ictx->ttimer.data = (unsigned long)ictx;
2187 ictx->ttimer.function = imon_touch_display_timeout;
2188 }
2189
2190 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2191 ictx->dev_present_intf1 = true;
2192 ictx->rx_urb_intf1 = rx_urb;
2193
2194 ret = -ENODEV;
2195 iface_desc = intf->cur_altsetting;
2196 if (!imon_find_endpoints(ictx, iface_desc))
2197 goto find_endpoint_failed;
2198
2199 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2200 ictx->touch = imon_init_touch(ictx);
2201 if (!ictx->touch)
2202 goto touch_setup_failed;
2203 } else
2204 ictx->touch = NULL;
2205
2206 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2207 usb_rcvintpipe(ictx->usbdev_intf1,
2208 ictx->rx_endpoint_intf1->bEndpointAddress),
2209 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2210 usb_rx_callback_intf1, ictx,
2211 ictx->rx_endpoint_intf1->bInterval);
2212
2213 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2214
2215 if (ret) {
2216 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2217 goto urb_submit_failed;
2218 }
2219
2220 return ictx;
2221
2222 urb_submit_failed:
2223 if (ictx->touch)
2224 input_unregister_device(ictx->touch);
2225 touch_setup_failed:
2226 find_endpoint_failed:
2227 mutex_unlock(&ictx->lock);
2228 usb_free_urb(rx_urb);
2229 rx_urb_alloc_failed:
2230 dev_err(ictx->dev, "unable to initialize intf0, err %d\n", ret);
2231
2232 return NULL;
2233 }
2234
2235 static void imon_init_display(struct imon_context *ictx,
2236 struct usb_interface *intf)
2237 {
2238 int ret;
2239
2240 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2241
2242 /* set up sysfs entry for built-in clock */
2243 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2244 if (ret)
2245 dev_err(ictx->dev, "Could not create display sysfs "
2246 "entries(%d)", ret);
2247
2248 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2249 ret = usb_register_dev(intf, &imon_lcd_class);
2250 else
2251 ret = usb_register_dev(intf, &imon_vfd_class);
2252 if (ret)
2253 /* Not a fatal error, so ignore */
2254 dev_info(ictx->dev, "could not get a minor number for "
2255 "display\n");
2256
2257 }
2258
2259 /**
2260 * Callback function for USB core API: Probe
2261 */
2262 static int __devinit imon_probe(struct usb_interface *interface,
2263 const struct usb_device_id *id)
2264 {
2265 struct usb_device *usbdev = NULL;
2266 struct usb_host_interface *iface_desc = NULL;
2267 struct usb_interface *first_if;
2268 struct device *dev = &interface->dev;
2269 int ifnum, code_length, sysfs_err;
2270 int ret = 0;
2271 struct imon_context *ictx = NULL;
2272 struct imon_context *first_if_ctx = NULL;
2273 u16 vendor, product;
2274
2275 code_length = BUF_CHUNK_SIZE * 8;
2276
2277 usbdev = usb_get_dev(interface_to_usbdev(interface));
2278 iface_desc = interface->cur_altsetting;
2279 ifnum = iface_desc->desc.bInterfaceNumber;
2280 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2281 product = le16_to_cpu(usbdev->descriptor.idProduct);
2282
2283 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2284 __func__, vendor, product, ifnum);
2285
2286 /* prevent races probing devices w/multiple interfaces */
2287 mutex_lock(&driver_lock);
2288
2289 first_if = usb_ifnum_to_if(usbdev, 0);
2290 first_if_ctx = (struct imon_context *)usb_get_intfdata(first_if);
2291
2292 if (ifnum == 0) {
2293 ictx = imon_init_intf0(interface);
2294 if (!ictx) {
2295 pr_err("failed to initialize context!\n");
2296 ret = -ENODEV;
2297 goto fail;
2298 }
2299
2300 } else {
2301 /* this is the secondary interface on the device */
2302 ictx = imon_init_intf1(interface, first_if_ctx);
2303 if (!ictx) {
2304 pr_err("failed to attach to context!\n");
2305 ret = -ENODEV;
2306 goto fail;
2307 }
2308
2309 }
2310
2311 usb_set_intfdata(interface, ictx);
2312
2313 if (ifnum == 0) {
2314 if (product == 0xffdc && ictx->rf_device) {
2315 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2316 &imon_rf_attr_group);
2317 if (sysfs_err)
2318 pr_err("Could not create RF sysfs entries(%d)\n",
2319 sysfs_err);
2320 }
2321
2322 if (ictx->display_supported)
2323 imon_init_display(ictx, interface);
2324 }
2325
2326 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2327 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2328 usbdev->bus->busnum, usbdev->devnum);
2329
2330 mutex_unlock(&ictx->lock);
2331 mutex_unlock(&driver_lock);
2332
2333 return 0;
2334
2335 fail:
2336 mutex_unlock(&driver_lock);
2337 dev_err(dev, "unable to register, err %d\n", ret);
2338
2339 return ret;
2340 }
2341
2342 /**
2343 * Callback function for USB core API: disconnect
2344 */
2345 static void __devexit imon_disconnect(struct usb_interface *interface)
2346 {
2347 struct imon_context *ictx;
2348 struct device *dev;
2349 int ifnum;
2350
2351 /* prevent races with multi-interface device probing and display_open */
2352 mutex_lock(&driver_lock);
2353
2354 ictx = usb_get_intfdata(interface);
2355 dev = ictx->dev;
2356 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2357
2358 mutex_lock(&ictx->lock);
2359
2360 /*
2361 * sysfs_remove_group is safe to call even if sysfs_create_group
2362 * hasn't been called
2363 */
2364 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2365 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2366
2367 usb_set_intfdata(interface, NULL);
2368
2369 /* Abort ongoing write */
2370 if (ictx->tx.busy) {
2371 usb_kill_urb(ictx->tx_urb);
2372 complete_all(&ictx->tx.finished);
2373 }
2374
2375 if (ifnum == 0) {
2376 ictx->dev_present_intf0 = false;
2377 usb_kill_urb(ictx->rx_urb_intf0);
2378 input_unregister_device(ictx->idev);
2379 ir_input_unregister(ictx->rdev);
2380 if (ictx->display_supported) {
2381 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2382 usb_deregister_dev(interface, &imon_lcd_class);
2383 else
2384 usb_deregister_dev(interface, &imon_vfd_class);
2385 }
2386 } else {
2387 ictx->dev_present_intf1 = false;
2388 usb_kill_urb(ictx->rx_urb_intf1);
2389 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2390 input_unregister_device(ictx->touch);
2391 }
2392
2393 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) {
2394 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2395 del_timer_sync(&ictx->ttimer);
2396 mutex_unlock(&ictx->lock);
2397 if (!ictx->display_isopen)
2398 free_imon_context(ictx);
2399 } else
2400 mutex_unlock(&ictx->lock);
2401
2402 mutex_unlock(&driver_lock);
2403
2404 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2405 __func__, ifnum);
2406 }
2407
2408 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2409 {
2410 struct imon_context *ictx = usb_get_intfdata(intf);
2411 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2412
2413 if (ifnum == 0)
2414 usb_kill_urb(ictx->rx_urb_intf0);
2415 else
2416 usb_kill_urb(ictx->rx_urb_intf1);
2417
2418 return 0;
2419 }
2420
2421 static int imon_resume(struct usb_interface *intf)
2422 {
2423 int rc = 0;
2424 struct imon_context *ictx = usb_get_intfdata(intf);
2425 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2426
2427 if (ifnum == 0) {
2428 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2429 usb_rcvintpipe(ictx->usbdev_intf0,
2430 ictx->rx_endpoint_intf0->bEndpointAddress),
2431 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2432 usb_rx_callback_intf0, ictx,
2433 ictx->rx_endpoint_intf0->bInterval);
2434
2435 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2436
2437 } else {
2438 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2439 usb_rcvintpipe(ictx->usbdev_intf1,
2440 ictx->rx_endpoint_intf1->bEndpointAddress),
2441 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2442 usb_rx_callback_intf1, ictx,
2443 ictx->rx_endpoint_intf1->bInterval);
2444
2445 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2446 }
2447
2448 return rc;
2449 }
2450
2451 static int __init imon_init(void)
2452 {
2453 int rc;
2454
2455 rc = usb_register(&imon_driver);
2456 if (rc) {
2457 pr_err("usb register failed(%d)\n", rc);
2458 rc = -ENODEV;
2459 }
2460
2461 return rc;
2462 }
2463
2464 static void __exit imon_exit(void)
2465 {
2466 usb_deregister(&imon_driver);
2467 }
2468
2469 module_init(imon_init);
2470 module_exit(imon_exit);
Linux kernel - Deliverables
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