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Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[cris-mirror.git] / drivers / media / rc / imon.c
blobe7dc6b46fdfac2df6f6ead2661d4fed6ea4c4358
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 "0.9.2"
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 /* 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_PROG1 }, /* Go */
281 { 0x000000001f00ffeell, KEY_AUDIO },
282 { 0x000000002000ffeell, KEY_VIDEO },
283 { 0x000000002100ffeell, KEY_CAMERA },
284 { 0x000000002700ffeell, KEY_DVD },
285 { 0x000000002300ffeell, KEY_TV },
286 { 0x000000000500ffeell, KEY_PREVIOUS },
287 { 0x000000000700ffeell, KEY_REWIND },
288 { 0x000000000400ffeell, KEY_STOP },
289 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
290 { 0x000000000800ffeell, KEY_FASTFORWARD },
291 { 0x000000000600ffeell, KEY_NEXT },
292 { 0x000000010000ffeell, KEY_RIGHT },
293 { 0x000001000000ffeell, KEY_LEFT },
294 { 0x000000003d00ffeell, KEY_SELECT },
295 { 0x000100000000ffeell, KEY_VOLUMEUP },
296 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
297 { 0x000000000100ffeell, KEY_MUTE },
298 /* 0xffdc iMON MCE VFD */
299 { 0x00010000ffffffeell, KEY_VOLUMEUP },
300 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
301 /* iMON Knob values */
302 { 0x000100ffffffffeell, KEY_VOLUMEUP },
303 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
304 { 0x000008ffffffffeell, KEY_MUTE },
305 };
306
307 /* to prevent races between open() and disconnect(), probing, etc */
308 static DEFINE_MUTEX(driver_lock);
309
310 /* Module bookkeeping bits */
311 MODULE_AUTHOR(MOD_AUTHOR);
312 MODULE_DESCRIPTION(MOD_DESC);
313 MODULE_VERSION(MOD_VERSION);
314 MODULE_LICENSE("GPL");
315 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
316
317 static bool debug;
318 module_param(debug, bool, S_IRUGO | S_IWUSR);
319 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
320
321 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
322 static int display_type;
323 module_param(display_type, int, S_IRUGO);
324 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
325 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
326
327 static int pad_stabilize = 1;
328 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
329 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
330 "presses in arrow key mode. 0=disable, 1=enable (default).");
331
332 /*
333 * In certain use cases, mouse mode isn't really helpful, and could actually
334 * cause confusion, so allow disabling it when the IR device is open.
335 */
336 static bool nomouse;
337 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
338 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
339 "open. 0=don't disable, 1=disable. (default: don't disable)");
340
341 /* threshold at which a pad push registers as an arrow key in kbd mode */
342 static int pad_thresh;
343 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
344 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
345 "arrow key in kbd mode (default: 28)");
346
347
348 static void free_imon_context(struct imon_context *ictx)
349 {
350 struct device *dev = ictx->dev;
351
352 usb_free_urb(ictx->tx_urb);
353 usb_free_urb(ictx->rx_urb_intf0);
354 usb_free_urb(ictx->rx_urb_intf1);
355 kfree(ictx);
356
357 dev_dbg(dev, "%s: iMON context freed\n", __func__);
358 }
359
360 /**
361 * Called when the Display device (e.g. /dev/lcd0)
362 * is opened by the application.
363 */
364 static int display_open(struct inode *inode, struct file *file)
365 {
366 struct usb_interface *interface;
367 struct imon_context *ictx = NULL;
368 int subminor;
369 int retval = 0;
370
371 /* prevent races with disconnect */
372 mutex_lock(&driver_lock);
373
374 subminor = iminor(inode);
375 interface = usb_find_interface(&imon_driver, subminor);
376 if (!interface) {
377 pr_err("could not find interface for minor %d\n", subminor);
378 retval = -ENODEV;
379 goto exit;
380 }
381 ictx = usb_get_intfdata(interface);
382
383 if (!ictx) {
384 pr_err("no context found for minor %d\n", subminor);
385 retval = -ENODEV;
386 goto exit;
387 }
388
389 mutex_lock(&ictx->lock);
390
391 if (!ictx->display_supported) {
392 pr_err("display not supported by device\n");
393 retval = -ENODEV;
394 } else if (ictx->display_isopen) {
395 pr_err("display port is already open\n");
396 retval = -EBUSY;
397 } else {
398 ictx->display_isopen = true;
399 file->private_data = ictx;
400 dev_dbg(ictx->dev, "display port opened\n");
401 }
402
403 mutex_unlock(&ictx->lock);
404
405 exit:
406 mutex_unlock(&driver_lock);
407 return retval;
408 }
409
410 /**
411 * Called when the display device (e.g. /dev/lcd0)
412 * is closed by the application.
413 */
414 static int display_close(struct inode *inode, struct file *file)
415 {
416 struct imon_context *ictx = NULL;
417 int retval = 0;
418
419 ictx = file->private_data;
420
421 if (!ictx) {
422 pr_err("no context for device\n");
423 return -ENODEV;
424 }
425
426 mutex_lock(&ictx->lock);
427
428 if (!ictx->display_supported) {
429 pr_err("display not supported by device\n");
430 retval = -ENODEV;
431 } else if (!ictx->display_isopen) {
432 pr_err("display is not open\n");
433 retval = -EIO;
434 } else {
435 ictx->display_isopen = false;
436 dev_dbg(ictx->dev, "display port closed\n");
437 if (!ictx->dev_present_intf0) {
438 /*
439 * Device disconnected before close and IR port is not
440 * open. If IR port is open, context will be deleted by
441 * ir_close.
442 */
443 mutex_unlock(&ictx->lock);
444 free_imon_context(ictx);
445 return retval;
446 }
447 }
448
449 mutex_unlock(&ictx->lock);
450 return retval;
451 }
452
453 /**
454 * Sends a packet to the device -- this function must be called
455 * with ictx->lock held.
456 */
457 static int send_packet(struct imon_context *ictx)
458 {
459 unsigned int pipe;
460 unsigned long timeout;
461 int interval = 0;
462 int retval = 0;
463 struct usb_ctrlrequest *control_req = NULL;
464
465 /* Check if we need to use control or interrupt urb */
466 if (!ictx->tx_control) {
467 pipe = usb_sndintpipe(ictx->usbdev_intf0,
468 ictx->tx_endpoint->bEndpointAddress);
469 interval = ictx->tx_endpoint->bInterval;
470
471 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
472 ictx->usb_tx_buf,
473 sizeof(ictx->usb_tx_buf),
474 usb_tx_callback, ictx, interval);
475
476 ictx->tx_urb->actual_length = 0;
477 } else {
478 /* fill request into kmalloc'ed space: */
479 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
480 GFP_KERNEL);
481 if (control_req == NULL)
482 return -ENOMEM;
483
484 /* setup packet is '21 09 0200 0001 0008' */
485 control_req->bRequestType = 0x21;
486 control_req->bRequest = 0x09;
487 control_req->wValue = cpu_to_le16(0x0200);
488 control_req->wIndex = cpu_to_le16(0x0001);
489 control_req->wLength = cpu_to_le16(0x0008);
490
491 /* control pipe is endpoint 0x00 */
492 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
493
494 /* build the control urb */
495 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
496 pipe, (unsigned char *)control_req,
497 ictx->usb_tx_buf,
498 sizeof(ictx->usb_tx_buf),
499 usb_tx_callback, ictx);
500 ictx->tx_urb->actual_length = 0;
501 }
502
503 init_completion(&ictx->tx.finished);
504 ictx->tx.busy = true;
505 smp_rmb(); /* ensure later readers know we're busy */
506
507 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
508 if (retval) {
509 ictx->tx.busy = false;
510 smp_rmb(); /* ensure later readers know we're not busy */
511 pr_err("error submitting urb(%d)\n", retval);
512 } else {
513 /* Wait for transmission to complete (or abort) */
514 mutex_unlock(&ictx->lock);
515 retval = wait_for_completion_interruptible(
516 &ictx->tx.finished);
517 if (retval)
518 pr_err("task interrupted\n");
519 mutex_lock(&ictx->lock);
520
521 retval = ictx->tx.status;
522 if (retval)
523 pr_err("packet tx failed (%d)\n", retval);
524 }
525
526 kfree(control_req);
527
528 /*
529 * Induce a mandatory 5ms delay before returning, as otherwise,
530 * send_packet can get called so rapidly as to overwhelm the device,
531 * particularly on faster systems and/or those with quirky usb.
532 */
533 timeout = msecs_to_jiffies(5);
534 set_current_state(TASK_UNINTERRUPTIBLE);
535 schedule_timeout(timeout);
536
537 return retval;
538 }
539
540 /**
541 * Sends an associate packet to the iMON 2.4G.
542 *
543 * This might not be such a good idea, since it has an id collision with
544 * some versions of the "IR & VFD" combo. The only way to determine if it
545 * is an RF version is to look at the product description string. (Which
546 * we currently do not fetch).
547 */
548 static int send_associate_24g(struct imon_context *ictx)
549 {
550 int retval;
551 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
552 0x00, 0x00, 0x00, 0x20 };
553
554 if (!ictx) {
555 pr_err("no context for device\n");
556 return -ENODEV;
557 }
558
559 if (!ictx->dev_present_intf0) {
560 pr_err("no iMON device present\n");
561 return -ENODEV;
562 }
563
564 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
565 retval = send_packet(ictx);
566
567 return retval;
568 }
569
570 /**
571 * Sends packets to setup and show clock on iMON display
572 *
573 * Arguments: year - last 2 digits of year, month - 1..12,
574 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
575 * hour - 0..23, minute - 0..59, second - 0..59
576 */
577 static int send_set_imon_clock(struct imon_context *ictx,
578 unsigned int year, unsigned int month,
579 unsigned int day, unsigned int dow,
580 unsigned int hour, unsigned int minute,
581 unsigned int second)
582 {
583 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
584 int retval = 0;
585 int i;
586
587 if (!ictx) {
588 pr_err("no context for device\n");
589 return -ENODEV;
590 }
591
592 switch (ictx->display_type) {
593 case IMON_DISPLAY_TYPE_LCD:
594 clock_enable_pkt[0][0] = 0x80;
595 clock_enable_pkt[0][1] = year;
596 clock_enable_pkt[0][2] = month-1;
597 clock_enable_pkt[0][3] = day;
598 clock_enable_pkt[0][4] = hour;
599 clock_enable_pkt[0][5] = minute;
600 clock_enable_pkt[0][6] = second;
601
602 clock_enable_pkt[1][0] = 0x80;
603 clock_enable_pkt[1][1] = 0;
604 clock_enable_pkt[1][2] = 0;
605 clock_enable_pkt[1][3] = 0;
606 clock_enable_pkt[1][4] = 0;
607 clock_enable_pkt[1][5] = 0;
608 clock_enable_pkt[1][6] = 0;
609
610 if (ictx->product == 0xffdc) {
611 clock_enable_pkt[0][7] = 0x50;
612 clock_enable_pkt[1][7] = 0x51;
613 } else {
614 clock_enable_pkt[0][7] = 0x88;
615 clock_enable_pkt[1][7] = 0x8a;
616 }
617
618 break;
619
620 case IMON_DISPLAY_TYPE_VFD:
621 clock_enable_pkt[0][0] = year;
622 clock_enable_pkt[0][1] = month-1;
623 clock_enable_pkt[0][2] = day;
624 clock_enable_pkt[0][3] = dow;
625 clock_enable_pkt[0][4] = hour;
626 clock_enable_pkt[0][5] = minute;
627 clock_enable_pkt[0][6] = second;
628 clock_enable_pkt[0][7] = 0x40;
629
630 clock_enable_pkt[1][0] = 0;
631 clock_enable_pkt[1][1] = 0;
632 clock_enable_pkt[1][2] = 1;
633 clock_enable_pkt[1][3] = 0;
634 clock_enable_pkt[1][4] = 0;
635 clock_enable_pkt[1][5] = 0;
636 clock_enable_pkt[1][6] = 0;
637 clock_enable_pkt[1][7] = 0x42;
638
639 break;
640
641 default:
642 return -ENODEV;
643 }
644
645 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
646 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
647 retval = send_packet(ictx);
648 if (retval) {
649 pr_err("send_packet failed for packet %d\n", i);
650 break;
651 }
652 }
653
654 return retval;
655 }
656
657 /**
658 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
659 */
660 static ssize_t show_associate_remote(struct device *d,
661 struct device_attribute *attr,
662 char *buf)
663 {
664 struct imon_context *ictx = dev_get_drvdata(d);
665
666 if (!ictx)
667 return -ENODEV;
668
669 mutex_lock(&ictx->lock);
670 if (ictx->rf_isassociating)
671 strcpy(buf, "associating\n");
672 else
673 strcpy(buf, "closed\n");
674
675 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
676 "instructions on how to associate your iMON 2.4G DT/LT "
677 "remote\n");
678 mutex_unlock(&ictx->lock);
679 return strlen(buf);
680 }
681
682 static ssize_t store_associate_remote(struct device *d,
683 struct device_attribute *attr,
684 const char *buf, size_t count)
685 {
686 struct imon_context *ictx;
687
688 ictx = dev_get_drvdata(d);
689
690 if (!ictx)
691 return -ENODEV;
692
693 mutex_lock(&ictx->lock);
694 ictx->rf_isassociating = true;
695 send_associate_24g(ictx);
696 mutex_unlock(&ictx->lock);
697
698 return count;
699 }
700
701 /**
702 * sysfs functions to control internal imon clock
703 */
704 static ssize_t show_imon_clock(struct device *d,
705 struct device_attribute *attr, char *buf)
706 {
707 struct imon_context *ictx = dev_get_drvdata(d);
708 size_t len;
709
710 if (!ictx)
711 return -ENODEV;
712
713 mutex_lock(&ictx->lock);
714
715 if (!ictx->display_supported) {
716 len = snprintf(buf, PAGE_SIZE, "Not supported.");
717 } else {
718 len = snprintf(buf, PAGE_SIZE,
719 "To set the clock on your iMON display:\n"
720 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
721 "%s", ictx->display_isopen ?
722 "\nNOTE: imon device must be closed\n" : "");
723 }
724
725 mutex_unlock(&ictx->lock);
726
727 return len;
728 }
729
730 static ssize_t store_imon_clock(struct device *d,
731 struct device_attribute *attr,
732 const char *buf, size_t count)
733 {
734 struct imon_context *ictx = dev_get_drvdata(d);
735 ssize_t retval;
736 unsigned int year, month, day, dow, hour, minute, second;
737
738 if (!ictx)
739 return -ENODEV;
740
741 mutex_lock(&ictx->lock);
742
743 if (!ictx->display_supported) {
744 retval = -ENODEV;
745 goto exit;
746 } else if (ictx->display_isopen) {
747 retval = -EBUSY;
748 goto exit;
749 }
750
751 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
752 &hour, &minute, &second) != 7) {
753 retval = -EINVAL;
754 goto exit;
755 }
756
757 if ((month < 1 || month > 12) ||
758 (day < 1 || day > 31) || (dow > 6) ||
759 (hour > 23) || (minute > 59) || (second > 59)) {
760 retval = -EINVAL;
761 goto exit;
762 }
763
764 retval = send_set_imon_clock(ictx, year, month, day, dow,
765 hour, minute, second);
766 if (retval)
767 goto exit;
768
769 retval = count;
770 exit:
771 mutex_unlock(&ictx->lock);
772
773 return retval;
774 }
775
776
777 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
778 store_imon_clock);
779
780 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
781 store_associate_remote);
782
783 static struct attribute *imon_display_sysfs_entries[] = {
784 &dev_attr_imon_clock.attr,
785 NULL
786 };
787
788 static struct attribute_group imon_display_attr_group = {
789 .attrs = imon_display_sysfs_entries
790 };
791
792 static struct attribute *imon_rf_sysfs_entries[] = {
793 &dev_attr_associate_remote.attr,
794 NULL
795 };
796
797 static struct attribute_group imon_rf_attr_group = {
798 .attrs = imon_rf_sysfs_entries
799 };
800
801 /**
802 * Writes data to the VFD. The iMON VFD is 2x16 characters
803 * and requires data in 5 consecutive USB interrupt packets,
804 * each packet but the last carrying 7 bytes.
805 *
806 * I don't know if the VFD board supports features such as
807 * scrolling, clearing rows, blanking, etc. so at
808 * the caller must provide a full screen of data. If fewer
809 * than 32 bytes are provided spaces will be appended to
810 * generate a full screen.
811 */
812 static ssize_t vfd_write(struct file *file, const char *buf,
813 size_t n_bytes, loff_t *pos)
814 {
815 int i;
816 int offset;
817 int seq;
818 int retval = 0;
819 struct imon_context *ictx;
820 const unsigned char vfd_packet6[] = {
821 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
822
823 ictx = file->private_data;
824 if (!ictx) {
825 pr_err("no context for device\n");
826 return -ENODEV;
827 }
828
829 mutex_lock(&ictx->lock);
830
831 if (!ictx->dev_present_intf0) {
832 pr_err("no iMON device present\n");
833 retval = -ENODEV;
834 goto exit;
835 }
836
837 if (n_bytes <= 0 || n_bytes > 32) {
838 pr_err("invalid payload size\n");
839 retval = -EINVAL;
840 goto exit;
841 }
842
843 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
844 retval = -EFAULT;
845 goto exit;
846 }
847
848 /* Pad with spaces */
849 for (i = n_bytes; i < 32; ++i)
850 ictx->tx.data_buf[i] = ' ';
851
852 for (i = 32; i < 35; ++i)
853 ictx->tx.data_buf[i] = 0xFF;
854
855 offset = 0;
856 seq = 0;
857
858 do {
859 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
860 ictx->usb_tx_buf[7] = (unsigned char) seq;
861
862 retval = send_packet(ictx);
863 if (retval) {
864 pr_err("send packet failed for packet #%d\n", seq / 2);
865 goto exit;
866 } else {
867 seq += 2;
868 offset += 7;
869 }
870
871 } while (offset < 35);
872
873 /* Send packet #6 */
874 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
875 ictx->usb_tx_buf[7] = (unsigned char) seq;
876 retval = send_packet(ictx);
877 if (retval)
878 pr_err("send packet failed for packet #%d\n", seq / 2);
879
880 exit:
881 mutex_unlock(&ictx->lock);
882
883 return (!retval) ? n_bytes : retval;
884 }
885
886 /**
887 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
888 * packets. We accept data as 16 hexadecimal digits, followed by a
889 * newline (to make it easy to drive the device from a command-line
890 * -- even though the actual binary data is a bit complicated).
891 *
892 * The device itself is not a "traditional" text-mode display. It's
893 * actually a 16x96 pixel bitmap display. That means if you want to
894 * display text, you've got to have your own "font" and translate the
895 * text into bitmaps for display. This is really flexible (you can
896 * display whatever diacritics you need, and so on), but it's also
897 * a lot more complicated than most LCDs...
898 */
899 static ssize_t lcd_write(struct file *file, const char *buf,
900 size_t n_bytes, loff_t *pos)
901 {
902 int retval = 0;
903 struct imon_context *ictx;
904
905 ictx = file->private_data;
906 if (!ictx) {
907 pr_err("no context for device\n");
908 return -ENODEV;
909 }
910
911 mutex_lock(&ictx->lock);
912
913 if (!ictx->display_supported) {
914 pr_err("no iMON display present\n");
915 retval = -ENODEV;
916 goto exit;
917 }
918
919 if (n_bytes != 8) {
920 pr_err("invalid payload size: %d (expected 8)\n", (int)n_bytes);
921 retval = -EINVAL;
922 goto exit;
923 }
924
925 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
926 retval = -EFAULT;
927 goto exit;
928 }
929
930 retval = send_packet(ictx);
931 if (retval) {
932 pr_err("send packet failed!\n");
933 goto exit;
934 } else {
935 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
936 __func__, (int) n_bytes);
937 }
938 exit:
939 mutex_unlock(&ictx->lock);
940 return (!retval) ? n_bytes : retval;
941 }
942
943 /**
944 * Callback function for USB core API: transmit data
945 */
946 static void usb_tx_callback(struct urb *urb)
947 {
948 struct imon_context *ictx;
949
950 if (!urb)
951 return;
952 ictx = (struct imon_context *)urb->context;
953 if (!ictx)
954 return;
955
956 ictx->tx.status = urb->status;
957
958 /* notify waiters that write has finished */
959 ictx->tx.busy = false;
960 smp_rmb(); /* ensure later readers know we're not busy */
961 complete(&ictx->tx.finished);
962 }
963
964 /**
965 * report touchscreen input
966 */
967 static void imon_touch_display_timeout(unsigned long data)
968 {
969 struct imon_context *ictx = (struct imon_context *)data;
970
971 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
972 return;
973
974 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
975 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
976 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
977 input_sync(ictx->touch);
978 }
979
980 /**
981 * iMON IR receivers support two different signal sets -- those used by
982 * the iMON remotes, and those used by the Windows MCE remotes (which is
983 * really just RC-6), but only one or the other at a time, as the signals
984 * are decoded onboard the receiver.
985 */
986 static int imon_ir_change_protocol(struct rc_dev *rc, u64 rc_type)
987 {
988 int retval;
989 struct imon_context *ictx = rc->priv;
990 struct device *dev = ictx->dev;
991 unsigned char ir_proto_packet[] = {
992 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
993
994 if (rc_type && !(rc_type & rc->allowed_protos))
995 dev_warn(dev, "Looks like you're trying to use an IR protocol "
996 "this device does not support\n");
997
998 switch (rc_type) {
999 case RC_TYPE_RC6:
1000 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1001 ir_proto_packet[0] = 0x01;
1002 break;
1003 case RC_TYPE_UNKNOWN:
1004 case RC_TYPE_OTHER:
1005 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1006 if (!pad_stabilize)
1007 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1008 /* ir_proto_packet[0] = 0x00; // already the default */
1009 rc_type = RC_TYPE_OTHER;
1010 break;
1011 default:
1012 dev_warn(dev, "Unsupported IR protocol specified, overriding "
1013 "to iMON IR protocol\n");
1014 if (!pad_stabilize)
1015 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1016 /* ir_proto_packet[0] = 0x00; // already the default */
1017 rc_type = RC_TYPE_OTHER;
1018 break;
1019 }
1020
1021 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1022
1023 retval = send_packet(ictx);
1024 if (retval)
1025 goto out;
1026
1027 ictx->rc_type = rc_type;
1028 ictx->pad_mouse = false;
1029
1030 out:
1031 return retval;
1032 }
1033
1034 static inline int tv2int(const struct timeval *a, const struct timeval *b)
1035 {
1036 int usecs = 0;
1037 int sec = 0;
1038
1039 if (b->tv_usec > a->tv_usec) {
1040 usecs = 1000000;
1041 sec--;
1042 }
1043
1044 usecs += a->tv_usec - b->tv_usec;
1045
1046 sec += a->tv_sec - b->tv_sec;
1047 sec *= 1000;
1048 usecs /= 1000;
1049 sec += usecs;
1050
1051 if (sec < 0)
1052 sec = 1000;
1053
1054 return sec;
1055 }
1056
1057 /**
1058 * The directional pad behaves a bit differently, depending on whether this is
1059 * one of the older ffdc devices or a newer device. Newer devices appear to
1060 * have a higher resolution matrix for more precise mouse movement, but it
1061 * makes things overly sensitive in keyboard mode, so we do some interesting
1062 * contortions to make it less touchy. Older devices run through the same
1063 * routine with shorter timeout and a smaller threshold.
1064 */
1065 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1066 {
1067 struct timeval ct;
1068 static struct timeval prev_time = {0, 0};
1069 static struct timeval hit_time = {0, 0};
1070 static int x, y, prev_result, hits;
1071 int result = 0;
1072 int msec, msec_hit;
1073
1074 do_gettimeofday(&ct);
1075 msec = tv2int(&ct, &prev_time);
1076 msec_hit = tv2int(&ct, &hit_time);
1077
1078 if (msec > 100) {
1079 x = 0;
1080 y = 0;
1081 hits = 0;
1082 }
1083
1084 x += a;
1085 y += b;
1086
1087 prev_time = ct;
1088
1089 if (abs(x) > threshold || abs(y) > threshold) {
1090 if (abs(y) > abs(x))
1091 result = (y > 0) ? 0x7F : 0x80;
1092 else
1093 result = (x > 0) ? 0x7F00 : 0x8000;
1094
1095 x = 0;
1096 y = 0;
1097
1098 if (result == prev_result) {
1099 hits++;
1100
1101 if (hits > 3) {
1102 switch (result) {
1103 case 0x7F:
1104 y = 17 * threshold / 30;
1105 break;
1106 case 0x80:
1107 y -= 17 * threshold / 30;
1108 break;
1109 case 0x7F00:
1110 x = 17 * threshold / 30;
1111 break;
1112 case 0x8000:
1113 x -= 17 * threshold / 30;
1114 break;
1115 }
1116 }
1117
1118 if (hits == 2 && msec_hit < timeout) {
1119 result = 0;
1120 hits = 1;
1121 }
1122 } else {
1123 prev_result = result;
1124 hits = 1;
1125 hit_time = ct;
1126 }
1127 }
1128
1129 return result;
1130 }
1131
1132 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1133 {
1134 u32 keycode;
1135 u32 release;
1136 bool is_release_code = false;
1137
1138 /* Look for the initial press of a button */
1139 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1140 ictx->rc_toggle = 0x0;
1141 ictx->rc_scancode = scancode;
1142
1143 /* Look for the release of a button */
1144 if (keycode == KEY_RESERVED) {
1145 release = scancode & ~0x4000;
1146 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1147 if (keycode != KEY_RESERVED)
1148 is_release_code = true;
1149 }
1150
1151 ictx->release_code = is_release_code;
1152
1153 return keycode;
1154 }
1155
1156 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1157 {
1158 u32 keycode;
1159
1160 #define MCE_KEY_MASK 0x7000
1161 #define MCE_TOGGLE_BIT 0x8000
1162
1163 /*
1164 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1165 * (the toggle bit flipping between alternating key presses), while
1166 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1167 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1168 * but we can't or them into all codes, as some keys are decoded in
1169 * a different way w/o the same use of the toggle bit...
1170 */
1171 if (scancode & 0x80000000)
1172 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1173
1174 ictx->rc_scancode = scancode;
1175 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1176
1177 /* not used in mce mode, but make sure we know its false */
1178 ictx->release_code = false;
1179
1180 return keycode;
1181 }
1182
1183 static u32 imon_panel_key_lookup(u64 code)
1184 {
1185 int i;
1186 u32 keycode = KEY_RESERVED;
1187
1188 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1189 if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
1190 keycode = imon_panel_key_table[i].keycode;
1191 break;
1192 }
1193 }
1194
1195 return keycode;
1196 }
1197
1198 static bool imon_mouse_event(struct imon_context *ictx,
1199 unsigned char *buf, int len)
1200 {
1201 char rel_x = 0x00, rel_y = 0x00;
1202 u8 right_shift = 1;
1203 bool mouse_input = true;
1204 int dir = 0;
1205 unsigned long flags;
1206
1207 spin_lock_irqsave(&ictx->kc_lock, flags);
1208
1209 /* newer iMON device PAD or mouse button */
1210 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1211 rel_x = buf[2];
1212 rel_y = buf[3];
1213 right_shift = 1;
1214 /* 0xffdc iMON PAD or mouse button input */
1215 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1216 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1217 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1218 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1219 if (buf[0] & 0x02)
1220 rel_x |= ~0x0f;
1221 rel_x = rel_x + rel_x / 2;
1222 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1223 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1224 if (buf[0] & 0x01)
1225 rel_y |= ~0x0f;
1226 rel_y = rel_y + rel_y / 2;
1227 right_shift = 2;
1228 /* some ffdc devices decode mouse buttons differently... */
1229 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1230 right_shift = 2;
1231 /* ch+/- buttons, which we use for an emulated scroll wheel */
1232 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1233 dir = 1;
1234 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1235 dir = -1;
1236 } else
1237 mouse_input = false;
1238
1239 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1240
1241 if (mouse_input) {
1242 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1243
1244 if (dir) {
1245 input_report_rel(ictx->idev, REL_WHEEL, dir);
1246 } else if (rel_x || rel_y) {
1247 input_report_rel(ictx->idev, REL_X, rel_x);
1248 input_report_rel(ictx->idev, REL_Y, rel_y);
1249 } else {
1250 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1251 input_report_key(ictx->idev, BTN_RIGHT,
1252 buf[1] >> right_shift & 0x1);
1253 }
1254 input_sync(ictx->idev);
1255 spin_lock_irqsave(&ictx->kc_lock, flags);
1256 ictx->last_keycode = ictx->kc;
1257 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1258 }
1259
1260 return mouse_input;
1261 }
1262
1263 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1264 {
1265 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1266 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1267 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1268 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1269 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1270 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1271 input_sync(ictx->touch);
1272 }
1273
1274 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1275 {
1276 int dir = 0;
1277 char rel_x = 0x00, rel_y = 0x00;
1278 u16 timeout, threshold;
1279 u32 scancode = KEY_RESERVED;
1280 unsigned long flags;
1281
1282 /*
1283 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1284 * contain a position coordinate (x,y), with each component ranging
1285 * from -14 to 14. We want to down-sample this to only 4 discrete values
1286 * for up/down/left/right arrow keys. Also, when you get too close to
1287 * diagonals, it has a tendancy to jump back and forth, so lets try to
1288 * ignore when they get too close.
1289 */
1290 if (ictx->product != 0xffdc) {
1291 /* first, pad to 8 bytes so it conforms with everything else */
1292 buf[5] = buf[6] = buf[7] = 0;
1293 timeout = 500; /* in msecs */
1294 /* (2*threshold) x (2*threshold) square */
1295 threshold = pad_thresh ? pad_thresh : 28;
1296 rel_x = buf[2];
1297 rel_y = buf[3];
1298
1299 if (ictx->rc_type == RC_TYPE_OTHER && pad_stabilize) {
1300 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1301 dir = stabilize((int)rel_x, (int)rel_y,
1302 timeout, threshold);
1303 if (!dir) {
1304 spin_lock_irqsave(&ictx->kc_lock,
1305 flags);
1306 ictx->kc = KEY_UNKNOWN;
1307 spin_unlock_irqrestore(&ictx->kc_lock,
1308 flags);
1309 return;
1310 }
1311 buf[2] = dir & 0xFF;
1312 buf[3] = (dir >> 8) & 0xFF;
1313 scancode = be32_to_cpu(*((u32 *)buf));
1314 }
1315 } else {
1316 /*
1317 * Hack alert: instead of using keycodes, we have
1318 * to use hard-coded scancodes here...
1319 */
1320 if (abs(rel_y) > abs(rel_x)) {
1321 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1322 buf[3] = 0;
1323 if (rel_y > 0)
1324 scancode = 0x01007f00; /* KEY_DOWN */
1325 else
1326 scancode = 0x01008000; /* KEY_UP */
1327 } else {
1328 buf[2] = 0;
1329 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1330 if (rel_x > 0)
1331 scancode = 0x0100007f; /* KEY_RIGHT */
1332 else
1333 scancode = 0x01000080; /* KEY_LEFT */
1334 }
1335 }
1336
1337 /*
1338 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1339 * device (15c2:ffdc). The remote generates various codes from
1340 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1341 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1342 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1343 * reversed endianess. Extract direction from buffer, rotate endianess,
1344 * adjust sign and feed the values into stabilize(). The resulting codes
1345 * will be 0x01008000, 0x01007F00, which match the newer devices.
1346 */
1347 } else {
1348 timeout = 10; /* in msecs */
1349 /* (2*threshold) x (2*threshold) square */
1350 threshold = pad_thresh ? pad_thresh : 15;
1351
1352 /* buf[1] is x */
1353 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1354 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1355 if (buf[0] & 0x02)
1356 rel_x |= ~0x10+1;
1357 /* buf[2] is y */
1358 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1359 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1360 if (buf[0] & 0x01)
1361 rel_y |= ~0x10+1;
1362
1363 buf[0] = 0x01;
1364 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1365
1366 if (ictx->rc_type == RC_TYPE_OTHER && pad_stabilize) {
1367 dir = stabilize((int)rel_x, (int)rel_y,
1368 timeout, threshold);
1369 if (!dir) {
1370 spin_lock_irqsave(&ictx->kc_lock, flags);
1371 ictx->kc = KEY_UNKNOWN;
1372 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1373 return;
1374 }
1375 buf[2] = dir & 0xFF;
1376 buf[3] = (dir >> 8) & 0xFF;
1377 scancode = be32_to_cpu(*((u32 *)buf));
1378 } else {
1379 /*
1380 * Hack alert: instead of using keycodes, we have
1381 * to use hard-coded scancodes here...
1382 */
1383 if (abs(rel_y) > abs(rel_x)) {
1384 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1385 buf[3] = 0;
1386 if (rel_y > 0)
1387 scancode = 0x01007f00; /* KEY_DOWN */
1388 else
1389 scancode = 0x01008000; /* KEY_UP */
1390 } else {
1391 buf[2] = 0;
1392 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1393 if (rel_x > 0)
1394 scancode = 0x0100007f; /* KEY_RIGHT */
1395 else
1396 scancode = 0x01000080; /* KEY_LEFT */
1397 }
1398 }
1399 }
1400
1401 if (scancode) {
1402 spin_lock_irqsave(&ictx->kc_lock, flags);
1403 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1404 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1405 }
1406 }
1407
1408 /**
1409 * figure out if these is a press or a release. We don't actually
1410 * care about repeats, as those will be auto-generated within the IR
1411 * subsystem for repeating scancodes.
1412 */
1413 static int imon_parse_press_type(struct imon_context *ictx,
1414 unsigned char *buf, u8 ktype)
1415 {
1416 int press_type = 0;
1417 unsigned long flags;
1418
1419 spin_lock_irqsave(&ictx->kc_lock, flags);
1420
1421 /* key release of 0x02XXXXXX key */
1422 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1423 ictx->kc = ictx->last_keycode;
1424
1425 /* mouse button release on (some) 0xffdc devices */
1426 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1427 buf[2] == 0x81 && buf[3] == 0xb7)
1428 ictx->kc = ictx->last_keycode;
1429
1430 /* mouse button release on (some other) 0xffdc devices */
1431 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1432 buf[2] == 0x81 && buf[3] == 0xb7)
1433 ictx->kc = ictx->last_keycode;
1434
1435 /* mce-specific button handling, no keyup events */
1436 else if (ktype == IMON_KEY_MCE) {
1437 ictx->rc_toggle = buf[2];
1438 press_type = 1;
1439
1440 /* incoherent or irrelevant data */
1441 } else if (ictx->kc == KEY_RESERVED)
1442 press_type = -EINVAL;
1443
1444 /* key release of 0xXXXXXXb7 key */
1445 else if (ictx->release_code)
1446 press_type = 0;
1447
1448 /* this is a button press */
1449 else
1450 press_type = 1;
1451
1452 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1453
1454 return press_type;
1455 }
1456
1457 /**
1458 * Process the incoming packet
1459 */
1460 static void imon_incoming_packet(struct imon_context *ictx,
1461 struct urb *urb, int intf)
1462 {
1463 int len = urb->actual_length;
1464 unsigned char *buf = urb->transfer_buffer;
1465 struct device *dev = ictx->dev;
1466 unsigned long flags;
1467 u32 kc;
1468 bool norelease = false;
1469 int i;
1470 u64 scancode;
1471 int press_type = 0;
1472 int msec;
1473 struct timeval t;
1474 static struct timeval prev_time = { 0, 0 };
1475 u8 ktype;
1476
1477 /* filter out junk data on the older 0xffdc imon devices */
1478 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1479 return;
1480
1481 /* Figure out what key was pressed */
1482 if (len == 8 && buf[7] == 0xee) {
1483 scancode = be64_to_cpu(*((u64 *)buf));
1484 ktype = IMON_KEY_PANEL;
1485 kc = imon_panel_key_lookup(scancode);
1486 } else {
1487 scancode = be32_to_cpu(*((u32 *)buf));
1488 if (ictx->rc_type == RC_TYPE_RC6) {
1489 ktype = IMON_KEY_IMON;
1490 if (buf[0] == 0x80)
1491 ktype = IMON_KEY_MCE;
1492 kc = imon_mce_key_lookup(ictx, scancode);
1493 } else {
1494 ktype = IMON_KEY_IMON;
1495 kc = imon_remote_key_lookup(ictx, scancode);
1496 }
1497 }
1498
1499 spin_lock_irqsave(&ictx->kc_lock, flags);
1500 /* keyboard/mouse mode toggle button */
1501 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1502 ictx->last_keycode = kc;
1503 if (!nomouse) {
1504 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1505 dev_dbg(dev, "toggling to %s mode\n",
1506 ictx->pad_mouse ? "mouse" : "keyboard");
1507 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1508 return;
1509 } else {
1510 ictx->pad_mouse = false;
1511 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1512 }
1513 }
1514
1515 ictx->kc = kc;
1516 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1517
1518 /* send touchscreen events through input subsystem if touchpad data */
1519 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1520 buf[7] == 0x86) {
1521 imon_touch_event(ictx, buf);
1522 return;
1523
1524 /* look for mouse events with pad in mouse mode */
1525 } else if (ictx->pad_mouse) {
1526 if (imon_mouse_event(ictx, buf, len))
1527 return;
1528 }
1529
1530 /* Now for some special handling to convert pad input to arrow keys */
1531 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1532 ((len == 8) && (buf[0] & 0x40) &&
1533 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1534 len = 8;
1535 imon_pad_to_keys(ictx, buf);
1536 norelease = true;
1537 }
1538
1539 if (debug) {
1540 printk(KERN_INFO "intf%d decoded packet: ", intf);
1541 for (i = 0; i < len; ++i)
1542 printk("%02x ", buf[i]);
1543 printk("\n");
1544 }
1545
1546 press_type = imon_parse_press_type(ictx, buf, ktype);
1547 if (press_type < 0)
1548 goto not_input_data;
1549
1550 spin_lock_irqsave(&ictx->kc_lock, flags);
1551 if (ictx->kc == KEY_UNKNOWN)
1552 goto unknown_key;
1553 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1554
1555 if (ktype != IMON_KEY_PANEL) {
1556 if (press_type == 0)
1557 rc_keyup(ictx->rdev);
1558 else {
1559 rc_keydown(ictx->rdev, ictx->rc_scancode, ictx->rc_toggle);
1560 spin_lock_irqsave(&ictx->kc_lock, flags);
1561 ictx->last_keycode = ictx->kc;
1562 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1563 }
1564 return;
1565 }
1566
1567 /* Only panel type events left to process now */
1568 spin_lock_irqsave(&ictx->kc_lock, flags);
1569
1570 /* KEY_MUTE repeats from knob need to be suppressed */
1571 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1572 do_gettimeofday(&t);
1573 msec = tv2int(&t, &prev_time);
1574 prev_time = t;
1575 if (msec < ictx->idev->rep[REP_DELAY]) {
1576 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1577 return;
1578 }
1579 }
1580 kc = ictx->kc;
1581
1582 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1583
1584 input_report_key(ictx->idev, kc, press_type);
1585 input_sync(ictx->idev);
1586
1587 /* panel keys don't generate a release */
1588 input_report_key(ictx->idev, kc, 0);
1589 input_sync(ictx->idev);
1590
1591 ictx->last_keycode = kc;
1592
1593 return;
1594
1595 unknown_key:
1596 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1597 dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
1598 (long long)scancode);
1599 return;
1600
1601 not_input_data:
1602 if (len != 8) {
1603 dev_warn(dev, "imon %s: invalid incoming packet "
1604 "size (len = %d, intf%d)\n", __func__, len, intf);
1605 return;
1606 }
1607
1608 /* iMON 2.4G associate frame */
1609 if (buf[0] == 0x00 &&
1610 buf[2] == 0xFF && /* REFID */
1611 buf[3] == 0xFF &&
1612 buf[4] == 0xFF &&
1613 buf[5] == 0xFF && /* iMON 2.4G */
1614 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1615 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1616 dev_warn(dev, "%s: remote associated refid=%02X\n",
1617 __func__, buf[1]);
1618 ictx->rf_isassociating = false;
1619 }
1620 }
1621
1622 /**
1623 * Callback function for USB core API: receive data
1624 */
1625 static void usb_rx_callback_intf0(struct urb *urb)
1626 {
1627 struct imon_context *ictx;
1628 int intfnum = 0;
1629
1630 if (!urb)
1631 return;
1632
1633 ictx = (struct imon_context *)urb->context;
1634 if (!ictx)
1635 return;
1636
1637 switch (urb->status) {
1638 case -ENOENT: /* usbcore unlink successful! */
1639 return;
1640
1641 case -ESHUTDOWN: /* transport endpoint was shut down */
1642 break;
1643
1644 case 0:
1645 imon_incoming_packet(ictx, urb, intfnum);
1646 break;
1647
1648 default:
1649 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1650 __func__, urb->status);
1651 break;
1652 }
1653
1654 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1655 }
1656
1657 static void usb_rx_callback_intf1(struct urb *urb)
1658 {
1659 struct imon_context *ictx;
1660 int intfnum = 1;
1661
1662 if (!urb)
1663 return;
1664
1665 ictx = (struct imon_context *)urb->context;
1666 if (!ictx)
1667 return;
1668
1669 switch (urb->status) {
1670 case -ENOENT: /* usbcore unlink successful! */
1671 return;
1672
1673 case -ESHUTDOWN: /* transport endpoint was shut down */
1674 break;
1675
1676 case 0:
1677 imon_incoming_packet(ictx, urb, intfnum);
1678 break;
1679
1680 default:
1681 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1682 __func__, urb->status);
1683 break;
1684 }
1685
1686 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1687 }
1688
1689 /*
1690 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1691 * devices, and all of them constantly spew interrupts, even when there
1692 * is no actual data to report. However, byte 6 of this buffer looks like
1693 * its unique across device variants, so we're trying to key off that to
1694 * figure out which display type (if any) and what IR protocol the device
1695 * actually supports. These devices have their IR protocol hard-coded into
1696 * their firmware, they can't be changed on the fly like the newer hardware.
1697 */
1698 static void imon_get_ffdc_type(struct imon_context *ictx)
1699 {
1700 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1701 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1702 u64 allowed_protos = RC_TYPE_OTHER;
1703
1704 switch (ffdc_cfg_byte) {
1705 /* iMON Knob, no display, iMON IR + vol knob */
1706 case 0x21:
1707 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1708 ictx->display_supported = false;
1709 break;
1710 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1711 case 0x4e:
1712 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1713 ictx->display_supported = false;
1714 ictx->rf_device = true;
1715 break;
1716 /* iMON VFD, no IR (does have vol knob tho) */
1717 case 0x35:
1718 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1719 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1720 break;
1721 /* iMON VFD, iMON IR */
1722 case 0x24:
1723 case 0x85:
1724 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1725 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1726 break;
1727 /* iMON VFD, MCE IR */
1728 case 0x9e:
1729 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1730 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1731 allowed_protos = RC_TYPE_RC6;
1732 break;
1733 /* iMON LCD, MCE IR */
1734 case 0x9f:
1735 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1736 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1737 allowed_protos = RC_TYPE_RC6;
1738 break;
1739 default:
1740 dev_info(ictx->dev, "Unknown 0xffdc device, "
1741 "defaulting to VFD and iMON IR");
1742 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1743 break;
1744 }
1745
1746 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1747
1748 ictx->display_type = detected_display_type;
1749 ictx->rc_type = allowed_protos;
1750 }
1751
1752 static void imon_set_display_type(struct imon_context *ictx)
1753 {
1754 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1755
1756 /*
1757 * Try to auto-detect the type of display if the user hasn't set
1758 * it by hand via the display_type modparam. Default is VFD.
1759 */
1760
1761 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1762 switch (ictx->product) {
1763 case 0xffdc:
1764 /* set in imon_get_ffdc_type() */
1765 configured_display_type = ictx->display_type;
1766 break;
1767 case 0x0034:
1768 case 0x0035:
1769 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1770 break;
1771 case 0x0038:
1772 case 0x0039:
1773 case 0x0045:
1774 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1775 break;
1776 case 0x003c:
1777 case 0x0041:
1778 case 0x0042:
1779 case 0x0043:
1780 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1781 ictx->display_supported = false;
1782 break;
1783 case 0x0036:
1784 case 0x0044:
1785 default:
1786 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1787 break;
1788 }
1789 } else {
1790 configured_display_type = display_type;
1791 if (display_type == IMON_DISPLAY_TYPE_NONE)
1792 ictx->display_supported = false;
1793 else
1794 ictx->display_supported = true;
1795 dev_info(ictx->dev, "%s: overriding display type to %d via "
1796 "modparam\n", __func__, display_type);
1797 }
1798
1799 ictx->display_type = configured_display_type;
1800 }
1801
1802 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1803 {
1804 struct rc_dev *rdev;
1805 int ret;
1806 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
1807 0x00, 0x00, 0x00, 0x88 };
1808
1809 rdev = rc_allocate_device();
1810 if (!rdev) {
1811 dev_err(ictx->dev, "remote control dev allocation failed\n");
1812 goto out;
1813 }
1814
1815 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1816 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1817 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1818 sizeof(ictx->phys_rdev));
1819 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1820
1821 rdev->input_name = ictx->name_rdev;
1822 rdev->input_phys = ictx->phys_rdev;
1823 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
1824 rdev->dev.parent = ictx->dev;
1825
1826 rdev->priv = ictx;
1827 rdev->driver_type = RC_DRIVER_SCANCODE;
1828 rdev->allowed_protos = RC_TYPE_OTHER | RC_TYPE_RC6; /* iMON PAD or MCE */
1829 rdev->change_protocol = imon_ir_change_protocol;
1830 rdev->driver_name = MOD_NAME;
1831
1832 /* Enable front-panel buttons and/or knobs */
1833 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1834 ret = send_packet(ictx);
1835 /* Not fatal, but warn about it */
1836 if (ret)
1837 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1838
1839 if (ictx->product == 0xffdc) {
1840 imon_get_ffdc_type(ictx);
1841 rdev->allowed_protos = ictx->rc_type;
1842 }
1843
1844 imon_set_display_type(ictx);
1845
1846 if (ictx->rc_type == RC_TYPE_RC6)
1847 rdev->map_name = RC_MAP_IMON_MCE;
1848 else
1849 rdev->map_name = RC_MAP_IMON_PAD;
1850
1851 ret = rc_register_device(rdev);
1852 if (ret < 0) {
1853 dev_err(ictx->dev, "remote input dev register failed\n");
1854 goto out;
1855 }
1856
1857 return rdev;
1858
1859 out:
1860 rc_free_device(rdev);
1861 return NULL;
1862 }
1863
1864 static struct input_dev *imon_init_idev(struct imon_context *ictx)
1865 {
1866 struct input_dev *idev;
1867 int ret, i;
1868
1869 idev = input_allocate_device();
1870 if (!idev) {
1871 dev_err(ictx->dev, "input dev allocation failed\n");
1872 goto out;
1873 }
1874
1875 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1876 "iMON Panel, Knob and Mouse(%04x:%04x)",
1877 ictx->vendor, ictx->product);
1878 idev->name = ictx->name_idev;
1879
1880 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
1881 sizeof(ictx->phys_idev));
1882 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
1883 idev->phys = ictx->phys_idev;
1884
1885 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
1886
1887 idev->keybit[BIT_WORD(BTN_MOUSE)] =
1888 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1889 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
1890 BIT_MASK(REL_WHEEL);
1891
1892 /* panel and/or knob code support */
1893 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1894 u32 kc = imon_panel_key_table[i].keycode;
1895 __set_bit(kc, idev->keybit);
1896 }
1897
1898 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
1899 idev->dev.parent = ictx->dev;
1900 input_set_drvdata(idev, ictx);
1901
1902 ret = input_register_device(idev);
1903 if (ret < 0) {
1904 dev_err(ictx->dev, "input dev register failed\n");
1905 goto out;
1906 }
1907
1908 return idev;
1909
1910 out:
1911 input_free_device(idev);
1912 return NULL;
1913 }
1914
1915 static struct input_dev *imon_init_touch(struct imon_context *ictx)
1916 {
1917 struct input_dev *touch;
1918 int ret;
1919
1920 touch = input_allocate_device();
1921 if (!touch) {
1922 dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
1923 goto touch_alloc_failed;
1924 }
1925
1926 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
1927 "iMON USB Touchscreen (%04x:%04x)",
1928 ictx->vendor, ictx->product);
1929 touch->name = ictx->name_touch;
1930
1931 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
1932 sizeof(ictx->phys_touch));
1933 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
1934 touch->phys = ictx->phys_touch;
1935
1936 touch->evbit[0] =
1937 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1938 touch->keybit[BIT_WORD(BTN_TOUCH)] =
1939 BIT_MASK(BTN_TOUCH);
1940 input_set_abs_params(touch, ABS_X,
1941 0x00, 0xfff, 0, 0);
1942 input_set_abs_params(touch, ABS_Y,
1943 0x00, 0xfff, 0, 0);
1944
1945 input_set_drvdata(touch, ictx);
1946
1947 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
1948 touch->dev.parent = ictx->dev;
1949 ret = input_register_device(touch);
1950 if (ret < 0) {
1951 dev_info(ictx->dev, "touchscreen input dev register failed\n");
1952 goto touch_register_failed;
1953 }
1954
1955 return touch;
1956
1957 touch_register_failed:
1958 input_free_device(ictx->touch);
1959
1960 touch_alloc_failed:
1961 return NULL;
1962 }
1963
1964 static bool imon_find_endpoints(struct imon_context *ictx,
1965 struct usb_host_interface *iface_desc)
1966 {
1967 struct usb_endpoint_descriptor *ep;
1968 struct usb_endpoint_descriptor *rx_endpoint = NULL;
1969 struct usb_endpoint_descriptor *tx_endpoint = NULL;
1970 int ifnum = iface_desc->desc.bInterfaceNumber;
1971 int num_endpts = iface_desc->desc.bNumEndpoints;
1972 int i, ep_dir, ep_type;
1973 bool ir_ep_found = false;
1974 bool display_ep_found = false;
1975 bool tx_control = false;
1976
1977 /*
1978 * Scan the endpoint list and set:
1979 * first input endpoint = IR endpoint
1980 * first output endpoint = display endpoint
1981 */
1982 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
1983 ep = &iface_desc->endpoint[i].desc;
1984 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1985 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
1986
1987 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
1988 ep_type == USB_ENDPOINT_XFER_INT) {
1989
1990 rx_endpoint = ep;
1991 ir_ep_found = true;
1992 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
1993
1994 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
1995 ep_type == USB_ENDPOINT_XFER_INT) {
1996 tx_endpoint = ep;
1997 display_ep_found = true;
1998 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
1999 }
2000 }
2001
2002 if (ifnum == 0) {
2003 ictx->rx_endpoint_intf0 = rx_endpoint;
2004 /*
2005 * tx is used to send characters to lcd/vfd, associate RF
2006 * remotes, set IR protocol, and maybe more...
2007 */
2008 ictx->tx_endpoint = tx_endpoint;
2009 } else {
2010 ictx->rx_endpoint_intf1 = rx_endpoint;
2011 }
2012
2013 /*
2014 * If we didn't find a display endpoint, this is probably one of the
2015 * newer iMON devices that use control urb instead of interrupt
2016 */
2017 if (!display_ep_found) {
2018 tx_control = true;
2019 display_ep_found = true;
2020 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
2021 "interface OUT endpoint\n", __func__);
2022 }
2023
2024 /*
2025 * Some iMON receivers have no display. Unfortunately, it seems
2026 * that SoundGraph recycles device IDs between devices both with
2027 * and without... :\
2028 */
2029 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2030 display_ep_found = false;
2031 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2032 }
2033
2034 /*
2035 * iMON Touch devices have a VGA touchscreen, but no "display", as
2036 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2037 */
2038 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2039 display_ep_found = false;
2040 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2041 }
2042
2043 /* Input endpoint is mandatory */
2044 if (!ir_ep_found)
2045 pr_err("no valid input (IR) endpoint found\n");
2046
2047 ictx->tx_control = tx_control;
2048
2049 if (display_ep_found)
2050 ictx->display_supported = true;
2051
2052 return ir_ep_found;
2053
2054 }
2055
2056 static struct imon_context *imon_init_intf0(struct usb_interface *intf)
2057 {
2058 struct imon_context *ictx;
2059 struct urb *rx_urb;
2060 struct urb *tx_urb;
2061 struct device *dev = &intf->dev;
2062 struct usb_host_interface *iface_desc;
2063 int ret = -ENOMEM;
2064
2065 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
2066 if (!ictx) {
2067 dev_err(dev, "%s: kzalloc failed for context", __func__);
2068 goto exit;
2069 }
2070 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2071 if (!rx_urb) {
2072 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
2073 goto rx_urb_alloc_failed;
2074 }
2075 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2076 if (!tx_urb) {
2077 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
2078 __func__);
2079 goto tx_urb_alloc_failed;
2080 }
2081
2082 mutex_init(&ictx->lock);
2083 spin_lock_init(&ictx->kc_lock);
2084
2085 mutex_lock(&ictx->lock);
2086
2087 ictx->dev = dev;
2088 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2089 ictx->dev_present_intf0 = true;
2090 ictx->rx_urb_intf0 = rx_urb;
2091 ictx->tx_urb = tx_urb;
2092 ictx->rf_device = false;
2093
2094 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2095 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2096
2097 ret = -ENODEV;
2098 iface_desc = intf->cur_altsetting;
2099 if (!imon_find_endpoints(ictx, iface_desc)) {
2100 goto find_endpoint_failed;
2101 }
2102
2103 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2104 usb_rcvintpipe(ictx->usbdev_intf0,
2105 ictx->rx_endpoint_intf0->bEndpointAddress),
2106 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2107 usb_rx_callback_intf0, ictx,
2108 ictx->rx_endpoint_intf0->bInterval);
2109
2110 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2111 if (ret) {
2112 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2113 goto urb_submit_failed;
2114 }
2115
2116 ictx->idev = imon_init_idev(ictx);
2117 if (!ictx->idev) {
2118 dev_err(dev, "%s: input device setup failed\n", __func__);
2119 goto idev_setup_failed;
2120 }
2121
2122 ictx->rdev = imon_init_rdev(ictx);
2123 if (!ictx->rdev) {
2124 dev_err(dev, "%s: rc device setup failed\n", __func__);
2125 goto rdev_setup_failed;
2126 }
2127
2128 return ictx;
2129
2130 rdev_setup_failed:
2131 input_unregister_device(ictx->idev);
2132 idev_setup_failed:
2133 usb_kill_urb(ictx->rx_urb_intf0);
2134 urb_submit_failed:
2135 find_endpoint_failed:
2136 mutex_unlock(&ictx->lock);
2137 usb_free_urb(tx_urb);
2138 tx_urb_alloc_failed:
2139 usb_free_urb(rx_urb);
2140 rx_urb_alloc_failed:
2141 kfree(ictx);
2142 exit:
2143 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2144
2145 return NULL;
2146 }
2147
2148 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2149 struct imon_context *ictx)
2150 {
2151 struct urb *rx_urb;
2152 struct usb_host_interface *iface_desc;
2153 int ret = -ENOMEM;
2154
2155 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2156 if (!rx_urb) {
2157 pr_err("usb_alloc_urb failed for IR urb\n");
2158 goto rx_urb_alloc_failed;
2159 }
2160
2161 mutex_lock(&ictx->lock);
2162
2163 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2164 init_timer(&ictx->ttimer);
2165 ictx->ttimer.data = (unsigned long)ictx;
2166 ictx->ttimer.function = imon_touch_display_timeout;
2167 }
2168
2169 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2170 ictx->dev_present_intf1 = true;
2171 ictx->rx_urb_intf1 = rx_urb;
2172
2173 ret = -ENODEV;
2174 iface_desc = intf->cur_altsetting;
2175 if (!imon_find_endpoints(ictx, iface_desc))
2176 goto find_endpoint_failed;
2177
2178 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2179 ictx->touch = imon_init_touch(ictx);
2180 if (!ictx->touch)
2181 goto touch_setup_failed;
2182 } else
2183 ictx->touch = NULL;
2184
2185 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2186 usb_rcvintpipe(ictx->usbdev_intf1,
2187 ictx->rx_endpoint_intf1->bEndpointAddress),
2188 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2189 usb_rx_callback_intf1, ictx,
2190 ictx->rx_endpoint_intf1->bInterval);
2191
2192 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2193
2194 if (ret) {
2195 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2196 goto urb_submit_failed;
2197 }
2198
2199 return ictx;
2200
2201 urb_submit_failed:
2202 if (ictx->touch)
2203 input_unregister_device(ictx->touch);
2204 touch_setup_failed:
2205 find_endpoint_failed:
2206 mutex_unlock(&ictx->lock);
2207 usb_free_urb(rx_urb);
2208 rx_urb_alloc_failed:
2209 dev_err(ictx->dev, "unable to initialize intf0, err %d\n", ret);
2210
2211 return NULL;
2212 }
2213
2214 static void imon_init_display(struct imon_context *ictx,
2215 struct usb_interface *intf)
2216 {
2217 int ret;
2218
2219 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2220
2221 /* set up sysfs entry for built-in clock */
2222 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2223 if (ret)
2224 dev_err(ictx->dev, "Could not create display sysfs "
2225 "entries(%d)", ret);
2226
2227 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2228 ret = usb_register_dev(intf, &imon_lcd_class);
2229 else
2230 ret = usb_register_dev(intf, &imon_vfd_class);
2231 if (ret)
2232 /* Not a fatal error, so ignore */
2233 dev_info(ictx->dev, "could not get a minor number for "
2234 "display\n");
2235
2236 }
2237
2238 /**
2239 * Callback function for USB core API: Probe
2240 */
2241 static int __devinit imon_probe(struct usb_interface *interface,
2242 const struct usb_device_id *id)
2243 {
2244 struct usb_device *usbdev = NULL;
2245 struct usb_host_interface *iface_desc = NULL;
2246 struct usb_interface *first_if;
2247 struct device *dev = &interface->dev;
2248 int ifnum, code_length, sysfs_err;
2249 int ret = 0;
2250 struct imon_context *ictx = NULL;
2251 struct imon_context *first_if_ctx = NULL;
2252 u16 vendor, product;
2253
2254 code_length = BUF_CHUNK_SIZE * 8;
2255
2256 usbdev = usb_get_dev(interface_to_usbdev(interface));
2257 iface_desc = interface->cur_altsetting;
2258 ifnum = iface_desc->desc.bInterfaceNumber;
2259 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2260 product = le16_to_cpu(usbdev->descriptor.idProduct);
2261
2262 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2263 __func__, vendor, product, ifnum);
2264
2265 /* prevent races probing devices w/multiple interfaces */
2266 mutex_lock(&driver_lock);
2267
2268 first_if = usb_ifnum_to_if(usbdev, 0);
2269 first_if_ctx = usb_get_intfdata(first_if);
2270
2271 if (ifnum == 0) {
2272 ictx = imon_init_intf0(interface);
2273 if (!ictx) {
2274 pr_err("failed to initialize context!\n");
2275 ret = -ENODEV;
2276 goto fail;
2277 }
2278
2279 } else {
2280 /* this is the secondary interface on the device */
2281 ictx = imon_init_intf1(interface, first_if_ctx);
2282 if (!ictx) {
2283 pr_err("failed to attach to context!\n");
2284 ret = -ENODEV;
2285 goto fail;
2286 }
2287
2288 }
2289
2290 usb_set_intfdata(interface, ictx);
2291
2292 if (ifnum == 0) {
2293 if (product == 0xffdc && ictx->rf_device) {
2294 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2295 &imon_rf_attr_group);
2296 if (sysfs_err)
2297 pr_err("Could not create RF sysfs entries(%d)\n",
2298 sysfs_err);
2299 }
2300
2301 if (ictx->display_supported)
2302 imon_init_display(ictx, interface);
2303 }
2304
2305 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2306 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2307 usbdev->bus->busnum, usbdev->devnum);
2308
2309 mutex_unlock(&ictx->lock);
2310 mutex_unlock(&driver_lock);
2311
2312 return 0;
2313
2314 fail:
2315 mutex_unlock(&driver_lock);
2316 dev_err(dev, "unable to register, err %d\n", ret);
2317
2318 return ret;
2319 }
2320
2321 /**
2322 * Callback function for USB core API: disconnect
2323 */
2324 static void __devexit imon_disconnect(struct usb_interface *interface)
2325 {
2326 struct imon_context *ictx;
2327 struct device *dev;
2328 int ifnum;
2329
2330 /* prevent races with multi-interface device probing and display_open */
2331 mutex_lock(&driver_lock);
2332
2333 ictx = usb_get_intfdata(interface);
2334 dev = ictx->dev;
2335 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2336
2337 mutex_lock(&ictx->lock);
2338
2339 /*
2340 * sysfs_remove_group is safe to call even if sysfs_create_group
2341 * hasn't been called
2342 */
2343 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2344 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2345
2346 usb_set_intfdata(interface, NULL);
2347
2348 /* Abort ongoing write */
2349 if (ictx->tx.busy) {
2350 usb_kill_urb(ictx->tx_urb);
2351 complete_all(&ictx->tx.finished);
2352 }
2353
2354 if (ifnum == 0) {
2355 ictx->dev_present_intf0 = false;
2356 usb_kill_urb(ictx->rx_urb_intf0);
2357 input_unregister_device(ictx->idev);
2358 rc_unregister_device(ictx->rdev);
2359 if (ictx->display_supported) {
2360 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2361 usb_deregister_dev(interface, &imon_lcd_class);
2362 else
2363 usb_deregister_dev(interface, &imon_vfd_class);
2364 }
2365 } else {
2366 ictx->dev_present_intf1 = false;
2367 usb_kill_urb(ictx->rx_urb_intf1);
2368 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2369 input_unregister_device(ictx->touch);
2370 }
2371
2372 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) {
2373 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2374 del_timer_sync(&ictx->ttimer);
2375 mutex_unlock(&ictx->lock);
2376 if (!ictx->display_isopen)
2377 free_imon_context(ictx);
2378 } else
2379 mutex_unlock(&ictx->lock);
2380
2381 mutex_unlock(&driver_lock);
2382
2383 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2384 __func__, ifnum);
2385 }
2386
2387 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2388 {
2389 struct imon_context *ictx = usb_get_intfdata(intf);
2390 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2391
2392 if (ifnum == 0)
2393 usb_kill_urb(ictx->rx_urb_intf0);
2394 else
2395 usb_kill_urb(ictx->rx_urb_intf1);
2396
2397 return 0;
2398 }
2399
2400 static int imon_resume(struct usb_interface *intf)
2401 {
2402 int rc = 0;
2403 struct imon_context *ictx = usb_get_intfdata(intf);
2404 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2405
2406 if (ifnum == 0) {
2407 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2408 usb_rcvintpipe(ictx->usbdev_intf0,
2409 ictx->rx_endpoint_intf0->bEndpointAddress),
2410 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2411 usb_rx_callback_intf0, ictx,
2412 ictx->rx_endpoint_intf0->bInterval);
2413
2414 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2415
2416 } else {
2417 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2418 usb_rcvintpipe(ictx->usbdev_intf1,
2419 ictx->rx_endpoint_intf1->bEndpointAddress),
2420 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2421 usb_rx_callback_intf1, ictx,
2422 ictx->rx_endpoint_intf1->bInterval);
2423
2424 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2425 }
2426
2427 return rc;
2428 }
2429
2430 static int __init imon_init(void)
2431 {
2432 int rc;
2433
2434 rc = usb_register(&imon_driver);
2435 if (rc) {
2436 pr_err("usb register failed(%d)\n", rc);
2437 rc = -ENODEV;
2438 }
2439
2440 return rc;
2441 }
2442
2443 static void __exit imon_exit(void)
2444 {
2445 usb_deregister(&imon_driver);
2446 }
2447
2448 module_init(imon_init);
2449 module_exit(imon_exit);
CRIS linux kernel tree