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[deliverable/linux.git] / drivers / media / IR / imon.c
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21677cfc
JW		 1/*
2 * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
3 *
4 * Copyright(C) 2009 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#include <linux/errno.h>
30#include <linux/init.h>
31#include <linux/kernel.h>
32#include <linux/module.h>
33#include <linux/slab.h>
34#include <linux/uaccess.h>
35
36#include <linux/input.h>
37#include <linux/usb.h>
38#include <linux/usb/input.h>
39#include <media/ir-core.h>
40
41#include <linux/time.h>
42#include <linux/timer.h>
43
44#define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
45#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
46#define MOD_NAME "imon"
47#define MOD_VERSION "0.9.1"
48
49#define DISPLAY_MINOR_BASE 144
50#define DEVICE_NAME "lcd%d"
51
52#define BUF_CHUNK_SIZE 8
53#define BUF_SIZE 128
54
55#define BIT_DURATION 250 /* each bit received is 250us */
56
57#define IMON_CLOCK_ENABLE_PACKETS 2
21677cfc
JW		 58
59/*** P R O T O T Y P E S ***/
60
61/* USB Callback prototypes */
62static int imon_probe(struct usb_interface *interface,
63 const struct usb_device_id *id);
64static void imon_disconnect(struct usb_interface *interface);
65static void usb_rx_callback_intf0(struct urb *urb);
66static void usb_rx_callback_intf1(struct urb *urb);
67static void usb_tx_callback(struct urb *urb);
68
69/* suspend/resume support */
70static int imon_resume(struct usb_interface *intf);
71static int imon_suspend(struct usb_interface *intf, pm_message_t message);
72
73/* Display file_operations function prototypes */
74static int display_open(struct inode *inode, struct file *file);
75static int display_close(struct inode *inode, struct file *file);
76
77/* VFD write operation */
78static ssize_t vfd_write(struct file *file, const char *buf,
79 size_t n_bytes, loff_t *pos);
80
81/* LCD file_operations override function prototypes */
82static ssize_t lcd_write(struct file *file, const char *buf,
83 size_t n_bytes, loff_t *pos);
84
85/*** G L O B A L S ***/
86
87struct imon_context {
88 struct device *dev;
89 struct ir_dev_props *props;
21677cfc
JW		 90 /* Newer devices have two interfaces */
91 struct usb_device *usbdev_intf0;
92 struct usb_device *usbdev_intf1;
93
94 bool display_supported; /* not all controllers do */
95 bool display_isopen; /* display port has been opened */
bbe4690f 96 bool rf_device; /* true if iMON 2.4G LT/DT RF device */
21677cfc
JW		 97 bool rf_isassociating; /* RF remote associating */
98 bool dev_present_intf0; /* USB device presence, interface 0 */
99 bool dev_present_intf1; /* USB device presence, interface 1 */
100
101 struct mutex lock; /* to lock this object */
102 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
103
104 struct usb_endpoint_descriptor *rx_endpoint_intf0;
105 struct usb_endpoint_descriptor *rx_endpoint_intf1;
106 struct usb_endpoint_descriptor *tx_endpoint;
107 struct urb *rx_urb_intf0;
108 struct urb *rx_urb_intf1;
109 struct urb *tx_urb;
110 bool tx_control;
111 unsigned char usb_rx_buf[8];
112 unsigned char usb_tx_buf[8];
113
114 struct tx_t {
115 unsigned char data_buf[35]; /* user data buffer */
116 struct completion finished; /* wait for write to finish */
117 bool busy; /* write in progress */
118 int status; /* status of tx completion */
119 } tx;
120
121 u16 vendor; /* usb vendor ID */
122 u16 product; /* usb product ID */
123
124 struct input_dev *idev; /* input device for remote */
125 struct input_dev *touch; /* input device for touchscreen */
126
127 u32 kc; /* current input keycode */
128 u32 last_keycode; /* last reported input keycode */
6718e8ad 129 u64 ir_type; /* iMON or MCE (RC6) IR protocol? */
21677cfc
JW		 130 u8 mce_toggle_bit; /* last mce toggle bit */
131 bool release_code; /* some keys send a release code */
132
133 u8 display_type; /* store the display type */
134 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
135
136 char name_idev[128]; /* input device name */
137 char phys_idev[64]; /* input device phys path */
138 struct timer_list itimer; /* input device timer, need for rc6 */
139
140 char name_touch[128]; /* touch screen name */
141 char phys_touch[64]; /* touch screen phys path */
142 struct timer_list ttimer; /* touch screen timer */
143 int touch_x; /* x coordinate on touchscreen */
144 int touch_y; /* y coordinate on touchscreen */
145};
146
147#define TOUCH_TIMEOUT (HZ/30)
21677cfc
JW		 148
149/* vfd character device file operations */
150static const struct file_operations vfd_fops = {
151 .owner = THIS_MODULE,
152 .open = &display_open,
153 .write = &vfd_write,
6038f373
AB		 154 .release = &display_close,
155 .llseek = noop_llseek,
21677cfc
JW		 156};
157
158/* lcd character device file operations */
159static const struct file_operations lcd_fops = {
160 .owner = THIS_MODULE,
161 .open = &display_open,
162 .write = &lcd_write,
6038f373
AB		 163 .release = &display_close,
164 .llseek = noop_llseek,
21677cfc
JW		 165};
166
167enum {
168 IMON_DISPLAY_TYPE_AUTO = 0,
169 IMON_DISPLAY_TYPE_VFD = 1,
170 IMON_DISPLAY_TYPE_LCD = 2,
171 IMON_DISPLAY_TYPE_VGA = 3,
172 IMON_DISPLAY_TYPE_NONE = 4,
173};
174
21677cfc
JW		 175enum {
176 IMON_KEY_IMON = 0,
177 IMON_KEY_MCE = 1,
178 IMON_KEY_PANEL = 2,
179};
180
181/*
182 * USB Device ID for iMON USB Control Boards
183 *
184 * The Windows drivers contain 6 different inf files, more or less one for
185 * each new device until the 0x0034-0x0046 devices, which all use the same
186 * driver. Some of the devices in the 34-46 range haven't been definitively
187 * identified yet. Early devices have either a TriGem Computer, Inc. or a
188 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
189 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
190 * the ffdc and later devices, which do onboard decoding.
191 */
192static struct usb_device_id imon_usb_id_table[] = {
193 /*
194 * Several devices with this same device ID, all use iMON_PAD.inf
195 * SoundGraph iMON PAD (IR & VFD)
196 * SoundGraph iMON PAD (IR & LCD)
197 * SoundGraph iMON Knob (IR only)
198 */
199 { USB_DEVICE(0x15c2, 0xffdc) },
200
201 /*
202 * Newer devices, all driven by the latest iMON Windows driver, full
203 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
204 * Need user input to fill in details on unknown devices.
205 */
206 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
207 { USB_DEVICE(0x15c2, 0x0034) },
208 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
209 { USB_DEVICE(0x15c2, 0x0035) },
210 /* SoundGraph iMON OEM VFD (IR & VFD) */
211 { USB_DEVICE(0x15c2, 0x0036) },
212 /* device specifics unknown */
213 { USB_DEVICE(0x15c2, 0x0037) },
214 /* SoundGraph iMON OEM LCD (IR & LCD) */
215 { USB_DEVICE(0x15c2, 0x0038) },
216 /* SoundGraph iMON UltraBay (IR & LCD) */
217 { USB_DEVICE(0x15c2, 0x0039) },
218 /* device specifics unknown */
219 { USB_DEVICE(0x15c2, 0x003a) },
220 /* device specifics unknown */
221 { USB_DEVICE(0x15c2, 0x003b) },
222 /* SoundGraph iMON OEM Inside (IR only) */
223 { USB_DEVICE(0x15c2, 0x003c) },
224 /* device specifics unknown */
225 { USB_DEVICE(0x15c2, 0x003d) },
226 /* device specifics unknown */
227 { USB_DEVICE(0x15c2, 0x003e) },
228 /* device specifics unknown */
229 { USB_DEVICE(0x15c2, 0x003f) },
230 /* device specifics unknown */
231 { USB_DEVICE(0x15c2, 0x0040) },
232 /* SoundGraph iMON MINI (IR only) */
233 { USB_DEVICE(0x15c2, 0x0041) },
234 /* Antec Veris Multimedia Station EZ External (IR only) */
235 { USB_DEVICE(0x15c2, 0x0042) },
236 /* Antec Veris Multimedia Station Basic Internal (IR only) */
237 { USB_DEVICE(0x15c2, 0x0043) },
238 /* Antec Veris Multimedia Station Elite (IR & VFD) */
239 { USB_DEVICE(0x15c2, 0x0044) },
240 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
241 { USB_DEVICE(0x15c2, 0x0045) },
242 /* device specifics unknown */
243 { USB_DEVICE(0x15c2, 0x0046) },
244 {}
245};
246
247/* USB Device data */
248static struct usb_driver imon_driver = {
249 .name = MOD_NAME,
250 .probe = imon_probe,
251 .disconnect = imon_disconnect,
252 .suspend = imon_suspend,
253 .resume = imon_resume,
254 .id_table = imon_usb_id_table,
255};
256
257static struct usb_class_driver imon_vfd_class = {
258 .name = DEVICE_NAME,
259 .fops = &vfd_fops,
260 .minor_base = DISPLAY_MINOR_BASE,
261};
262
263static struct usb_class_driver imon_lcd_class = {
264 .name = DEVICE_NAME,
265 .fops = &lcd_fops,
266 .minor_base = DISPLAY_MINOR_BASE,
267};
268
269/* imon receiver front panel/knob key table */
270static const struct {
271 u64 hw_code;
272 u32 keycode;
273} imon_panel_key_table[] = {
1f71baef
MCC		 274 { 0x000000000f00ffeell, KEY_PROG1 }, /* Go */
275 { 0x000000001f00ffeell, KEY_AUDIO },
276 { 0x000000002000ffeell, KEY_VIDEO },
277 { 0x000000002100ffeell, KEY_CAMERA },
278 { 0x000000002700ffeell, KEY_DVD },
279 { 0x000000002300ffeell, KEY_TV },
280 { 0x000000000500ffeell, KEY_PREVIOUS },
281 { 0x000000000700ffeell, KEY_REWIND },
282 { 0x000000000400ffeell, KEY_STOP },
283 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
284 { 0x000000000800ffeell, KEY_FASTFORWARD },
285 { 0x000000000600ffeell, KEY_NEXT },
286 { 0x000000010000ffeell, KEY_RIGHT },
287 { 0x000001000000ffeell, KEY_LEFT },
288 { 0x000000003d00ffeell, KEY_SELECT },
289 { 0x000100000000ffeell, KEY_VOLUMEUP },
290 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
291 { 0x000000000100ffeell, KEY_MUTE },
21677cfc 292 /* iMON Knob values */
1f71baef
MCC		 293 { 0x000100ffffffffeell, KEY_VOLUMEUP },
294 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
295 { 0x000008ffffffffeell, KEY_MUTE },
21677cfc
JW		 296};
297
298/* to prevent races between open() and disconnect(), probing, etc */
299static DEFINE_MUTEX(driver_lock);
300
301/* Module bookkeeping bits */
302MODULE_AUTHOR(MOD_AUTHOR);
303MODULE_DESCRIPTION(MOD_DESC);
304MODULE_VERSION(MOD_VERSION);
305MODULE_LICENSE("GPL");
306MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
307
308static bool debug;
309module_param(debug, bool, S_IRUGO | S_IWUSR);
310MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)");
311
312/* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
313static int display_type;
314module_param(display_type, int, S_IRUGO);
315MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
316 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
317
6718e8ad
JW		 318static int pad_stabilize = 1;
319module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
320MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
321 "presses in arrow key mode. 0=disable, 1=enable (default).");
21677cfc
JW		 322
323/*
324 * In certain use cases, mouse mode isn't really helpful, and could actually
325 * cause confusion, so allow disabling it when the IR device is open.
326 */
327static bool nomouse;
328module_param(nomouse, bool, S_IRUGO | S_IWUSR);
329MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
330 "open. 0=don't disable, 1=disable. (default: don't disable)");
331
332/* threshold at which a pad push registers as an arrow key in kbd mode */
333static int pad_thresh;
334module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
335MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
336 "arrow key in kbd mode (default: 28)");
337
338
339static void free_imon_context(struct imon_context *ictx)
340{
341 struct device *dev = ictx->dev;
342
343 usb_free_urb(ictx->tx_urb);
344 usb_free_urb(ictx->rx_urb_intf0);
345 usb_free_urb(ictx->rx_urb_intf1);
346 kfree(ictx);
347
348 dev_dbg(dev, "%s: iMON context freed\n", __func__);
349}
350
351/**
352 * Called when the Display device (e.g. /dev/lcd0)
353 * is opened by the application.
354 */
355static int display_open(struct inode *inode, struct file *file)
356{
357 struct usb_interface *interface;
358 struct imon_context *ictx = NULL;
359 int subminor;
360 int retval = 0;
361
362 /* prevent races with disconnect */
363 mutex_lock(&driver_lock);
364
365 subminor = iminor(inode);
366 interface = usb_find_interface(&imon_driver, subminor);
367 if (!interface) {
368 err("%s: could not find interface for minor %d",
369 __func__, subminor);
370 retval = -ENODEV;
371 goto exit;
372 }
373 ictx = usb_get_intfdata(interface);
374
375 if (!ictx) {
376 err("%s: no context found for minor %d", __func__, subminor);
377 retval = -ENODEV;
378 goto exit;
379 }
380
381 mutex_lock(&ictx->lock);
382
383 if (!ictx->display_supported) {
384 err("%s: display not supported by device", __func__);
385 retval = -ENODEV;
386 } else if (ictx->display_isopen) {
387 err("%s: display port is already open", __func__);
388 retval = -EBUSY;
389 } else {
f789bf40 390 ictx->display_isopen = true;
21677cfc
JW		 391 file->private_data = ictx;
392 dev_dbg(ictx->dev, "display port opened\n");
393 }
394
395 mutex_unlock(&ictx->lock);
396
397exit:
398 mutex_unlock(&driver_lock);
399 return retval;
400}
401
402/**
403 * Called when the display device (e.g. /dev/lcd0)
404 * is closed by the application.
405 */
406static int display_close(struct inode *inode, struct file *file)
407{
408 struct imon_context *ictx = NULL;
409 int retval = 0;
410
abf84383 411 ictx = file->private_data;
21677cfc
JW		 412
413 if (!ictx) {
414 err("%s: no context for device", __func__);
415 return -ENODEV;
416 }
417
418 mutex_lock(&ictx->lock);
419
420 if (!ictx->display_supported) {
421 err("%s: display not supported by device", __func__);
422 retval = -ENODEV;
423 } else if (!ictx->display_isopen) {
424 err("%s: display is not open", __func__);
425 retval = -EIO;
426 } else {
f789bf40 427 ictx->display_isopen = false;
21677cfc
JW		 428 dev_dbg(ictx->dev, "display port closed\n");
429 if (!ictx->dev_present_intf0) {
430 /*
431 * Device disconnected before close and IR port is not
432 * open. If IR port is open, context will be deleted by
433 * ir_close.
434 */
435 mutex_unlock(&ictx->lock);
436 free_imon_context(ictx);
437 return retval;
438 }
439 }
440
441 mutex_unlock(&ictx->lock);
442 return retval;
443}
444
445/**
446 * Sends a packet to the device -- this function must be called
447 * with ictx->lock held.
448 */
449static int send_packet(struct imon_context *ictx)
450{
451 unsigned int pipe;
452 unsigned long timeout;
453 int interval = 0;
454 int retval = 0;
455 struct usb_ctrlrequest *control_req = NULL;
456
457 /* Check if we need to use control or interrupt urb */
458 if (!ictx->tx_control) {
459 pipe = usb_sndintpipe(ictx->usbdev_intf0,
460 ictx->tx_endpoint->bEndpointAddress);
461 interval = ictx->tx_endpoint->bInterval;
462
463 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
464 ictx->usb_tx_buf,
465 sizeof(ictx->usb_tx_buf),
466 usb_tx_callback, ictx, interval);
467
468 ictx->tx_urb->actual_length = 0;
469 } else {
470 /* fill request into kmalloc'ed space: */
471 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
472 GFP_KERNEL);
473 if (control_req == NULL)
474 return -ENOMEM;
475
476 /* setup packet is '21 09 0200 0001 0008' */
477 control_req->bRequestType = 0x21;
478 control_req->bRequest = 0x09;
479 control_req->wValue = cpu_to_le16(0x0200);
480 control_req->wIndex = cpu_to_le16(0x0001);
481 control_req->wLength = cpu_to_le16(0x0008);
482
483 /* control pipe is endpoint 0x00 */
484 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
485
486 /* build the control urb */
487 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
488 pipe, (unsigned char *)control_req,
489 ictx->usb_tx_buf,
490 sizeof(ictx->usb_tx_buf),
491 usb_tx_callback, ictx);
492 ictx->tx_urb->actual_length = 0;
493 }
494
495 init_completion(&ictx->tx.finished);
f789bf40 496 ictx->tx.busy = true;
21677cfc
JW		 497 smp_rmb(); /* ensure later readers know we're busy */
498
499 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
500 if (retval) {
f789bf40 501 ictx->tx.busy = false;
21677cfc
JW		 502 smp_rmb(); /* ensure later readers know we're not busy */
503 err("%s: error submitting urb(%d)", __func__, retval);
504 } else {
505 /* Wait for transmission to complete (or abort) */
506 mutex_unlock(&ictx->lock);
507 retval = wait_for_completion_interruptible(
508 &ictx->tx.finished);
509 if (retval)
510 err("%s: task interrupted", __func__);
511 mutex_lock(&ictx->lock);
512
513 retval = ictx->tx.status;
514 if (retval)
515 err("%s: packet tx failed (%d)", __func__, retval);
516 }
517
518 kfree(control_req);
519
520 /*
521 * Induce a mandatory 5ms delay before returning, as otherwise,
522 * send_packet can get called so rapidly as to overwhelm the device,
523 * particularly on faster systems and/or those with quirky usb.
524 */
525 timeout = msecs_to_jiffies(5);
526 set_current_state(TASK_UNINTERRUPTIBLE);
527 schedule_timeout(timeout);
528
529 return retval;
530}
531
532/**
533 * Sends an associate packet to the iMON 2.4G.
534 *
535 * This might not be such a good idea, since it has an id collision with
536 * some versions of the "IR & VFD" combo. The only way to determine if it
537 * is an RF version is to look at the product description string. (Which
538 * we currently do not fetch).
539 */
540static int send_associate_24g(struct imon_context *ictx)
541{
542 int retval;
543 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
544 0x00, 0x00, 0x00, 0x20 };
545
546 if (!ictx) {
547 err("%s: no context for device", __func__);
548 return -ENODEV;
549 }
550
551 if (!ictx->dev_present_intf0) {
552 err("%s: no iMON device present", __func__);
553 return -ENODEV;
554 }
555
556 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
557 retval = send_packet(ictx);
558
559 return retval;
560}
561
562/**
563 * Sends packets to setup and show clock on iMON display
564 *
565 * Arguments: year - last 2 digits of year, month - 1..12,
566 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
567 * hour - 0..23, minute - 0..59, second - 0..59
568 */
569static int send_set_imon_clock(struct imon_context *ictx,
570 unsigned int year, unsigned int month,
571 unsigned int day, unsigned int dow,
572 unsigned int hour, unsigned int minute,
573 unsigned int second)
574{
575 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
576 int retval = 0;
577 int i;
578
579 if (!ictx) {
580 err("%s: no context for device", __func__);
581 return -ENODEV;
582 }
583
584 switch (ictx->display_type) {
585 case IMON_DISPLAY_TYPE_LCD:
586 clock_enable_pkt[0][0] = 0x80;
587 clock_enable_pkt[0][1] = year;
588 clock_enable_pkt[0][2] = month-1;
589 clock_enable_pkt[0][3] = day;
590 clock_enable_pkt[0][4] = hour;
591 clock_enable_pkt[0][5] = minute;
592 clock_enable_pkt[0][6] = second;
593
594 clock_enable_pkt[1][0] = 0x80;
595 clock_enable_pkt[1][1] = 0;
596 clock_enable_pkt[1][2] = 0;
597 clock_enable_pkt[1][3] = 0;
598 clock_enable_pkt[1][4] = 0;
599 clock_enable_pkt[1][5] = 0;
600 clock_enable_pkt[1][6] = 0;
601
602 if (ictx->product == 0xffdc) {
603 clock_enable_pkt[0][7] = 0x50;
604 clock_enable_pkt[1][7] = 0x51;
605 } else {
606 clock_enable_pkt[0][7] = 0x88;
607 clock_enable_pkt[1][7] = 0x8a;
608 }
609
610 break;
611
612 case IMON_DISPLAY_TYPE_VFD:
613 clock_enable_pkt[0][0] = year;
614 clock_enable_pkt[0][1] = month-1;
615 clock_enable_pkt[0][2] = day;
616 clock_enable_pkt[0][3] = dow;
617 clock_enable_pkt[0][4] = hour;
618 clock_enable_pkt[0][5] = minute;
619 clock_enable_pkt[0][6] = second;
620 clock_enable_pkt[0][7] = 0x40;
621
622 clock_enable_pkt[1][0] = 0;
623 clock_enable_pkt[1][1] = 0;
624 clock_enable_pkt[1][2] = 1;
625 clock_enable_pkt[1][3] = 0;
626 clock_enable_pkt[1][4] = 0;
627 clock_enable_pkt[1][5] = 0;
628 clock_enable_pkt[1][6] = 0;
629 clock_enable_pkt[1][7] = 0x42;
630
631 break;
632
633 default:
634 return -ENODEV;
635 }
636
637 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
638 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
639 retval = send_packet(ictx);
640 if (retval) {
641 err("%s: send_packet failed for packet %d",
642 __func__, i);
643 break;
644 }
645 }
646
647 return retval;
648}
649
650/**
651 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
652 */
653static ssize_t show_associate_remote(struct device *d,
654 struct device_attribute *attr,
655 char *buf)
656{
657 struct imon_context *ictx = dev_get_drvdata(d);
658
659 if (!ictx)
660 return -ENODEV;
661
662 mutex_lock(&ictx->lock);
663 if (ictx->rf_isassociating)
664 strcpy(buf, "associating\n");
665 else
666 strcpy(buf, "closed\n");
667
668 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
669 "instructions on how to associate your iMON 2.4G DT/LT "
670 "remote\n");
671 mutex_unlock(&ictx->lock);
672 return strlen(buf);
673}
674
675static ssize_t store_associate_remote(struct device *d,
676 struct device_attribute *attr,
677 const char *buf, size_t count)
678{
679 struct imon_context *ictx;
680
681 ictx = dev_get_drvdata(d);
682
683 if (!ictx)
684 return -ENODEV;
685
686 mutex_lock(&ictx->lock);
f789bf40 687 ictx->rf_isassociating = true;
21677cfc
JW		 688 send_associate_24g(ictx);
689 mutex_unlock(&ictx->lock);
690
691 return count;
692}
693
694/**
695 * sysfs functions to control internal imon clock
696 */
697static ssize_t show_imon_clock(struct device *d,
698 struct device_attribute *attr, char *buf)
699{
700 struct imon_context *ictx = dev_get_drvdata(d);
701 size_t len;
702
703 if (!ictx)
704 return -ENODEV;
705
706 mutex_lock(&ictx->lock);
707
708 if (!ictx->display_supported) {
709 len = snprintf(buf, PAGE_SIZE, "Not supported.");
710 } else {
711 len = snprintf(buf, PAGE_SIZE,
712 "To set the clock on your iMON display:\n"
713 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
714 "%s", ictx->display_isopen ?
715 "\nNOTE: imon device must be closed\n" : "");
716 }
717
718 mutex_unlock(&ictx->lock);
719
720 return len;
721}
722
723static ssize_t store_imon_clock(struct device *d,
724 struct device_attribute *attr,
725 const char *buf, size_t count)
726{
727 struct imon_context *ictx = dev_get_drvdata(d);
728 ssize_t retval;
729 unsigned int year, month, day, dow, hour, minute, second;
730
731 if (!ictx)
732 return -ENODEV;
733
734 mutex_lock(&ictx->lock);
735
736 if (!ictx->display_supported) {
737 retval = -ENODEV;
738 goto exit;
739 } else if (ictx->display_isopen) {
740 retval = -EBUSY;
741 goto exit;
742 }
743
744 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
745 &hour, &minute, &second) != 7) {
746 retval = -EINVAL;
747 goto exit;
748 }
749
750 if ((month < 1 || month > 12) ||
751 (day < 1 || day > 31) || (dow > 6) ||
752 (hour > 23) || (minute > 59) || (second > 59)) {
753 retval = -EINVAL;
754 goto exit;
755 }
756
757 retval = send_set_imon_clock(ictx, year, month, day, dow,
758 hour, minute, second);
759 if (retval)
760 goto exit;
761
762 retval = count;
763exit:
764 mutex_unlock(&ictx->lock);
765
766 return retval;
767}
768
769
770static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
771 store_imon_clock);
772
773static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
774 store_associate_remote);
775
776static struct attribute *imon_display_sysfs_entries[] = {
777 &dev_attr_imon_clock.attr,
778 NULL
779};
780
781static struct attribute_group imon_display_attribute_group = {
782 .attrs = imon_display_sysfs_entries
783};
784
785static struct attribute *imon_rf_sysfs_entries[] = {
786 &dev_attr_associate_remote.attr,
787 NULL
788};
789
790static struct attribute_group imon_rf_attribute_group = {
791 .attrs = imon_rf_sysfs_entries
792};
793
794/**
795 * Writes data to the VFD. The iMON VFD is 2x16 characters
796 * and requires data in 5 consecutive USB interrupt packets,
797 * each packet but the last carrying 7 bytes.
798 *
799 * I don't know if the VFD board supports features such as
800 * scrolling, clearing rows, blanking, etc. so at
801 * the caller must provide a full screen of data. If fewer
802 * than 32 bytes are provided spaces will be appended to
803 * generate a full screen.
804 */
805static ssize_t vfd_write(struct file *file, const char *buf,
806 size_t n_bytes, loff_t *pos)
807{
808 int i;
809 int offset;
810 int seq;
811 int retval = 0;
812 struct imon_context *ictx;
813 const unsigned char vfd_packet6[] = {
814 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
815
abf84383 816 ictx = file->private_data;
21677cfc
JW		 817 if (!ictx) {
818 err("%s: no context for device", __func__);
819 return -ENODEV;
820 }
821
822 mutex_lock(&ictx->lock);
823
824 if (!ictx->dev_present_intf0) {
825 err("%s: no iMON device present", __func__);
826 retval = -ENODEV;
827 goto exit;
828 }
829
830 if (n_bytes <= 0 || n_bytes > 32) {
831 err("%s: invalid payload size", __func__);
832 retval = -EINVAL;
833 goto exit;
834 }
835
836 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
837 retval = -EFAULT;
838 goto exit;
839 }
840
841 /* Pad with spaces */
842 for (i = n_bytes; i < 32; ++i)
843 ictx->tx.data_buf[i] = ' ';
844
845 for (i = 32; i < 35; ++i)
846 ictx->tx.data_buf[i] = 0xFF;
847
848 offset = 0;
849 seq = 0;
850
851 do {
852 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
853 ictx->usb_tx_buf[7] = (unsigned char) seq;
854
855 retval = send_packet(ictx);
856 if (retval) {
857 err("%s: send packet failed for packet #%d",
858 __func__, seq/2);
859 goto exit;
860 } else {
861 seq += 2;
862 offset += 7;
863 }
864
865 } while (offset < 35);
866
867 /* Send packet #6 */
868 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
869 ictx->usb_tx_buf[7] = (unsigned char) seq;
870 retval = send_packet(ictx);
871 if (retval)
872 err("%s: send packet failed for packet #%d",
873 __func__, seq / 2);
874
875exit:
876 mutex_unlock(&ictx->lock);
877
878 return (!retval) ? n_bytes : retval;
879}
880
881/**
882 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
883 * packets. We accept data as 16 hexadecimal digits, followed by a
884 * newline (to make it easy to drive the device from a command-line
885 * -- even though the actual binary data is a bit complicated).
886 *
887 * The device itself is not a "traditional" text-mode display. It's
888 * actually a 16x96 pixel bitmap display. That means if you want to
889 * display text, you've got to have your own "font" and translate the
890 * text into bitmaps for display. This is really flexible (you can
891 * display whatever diacritics you need, and so on), but it's also
892 * a lot more complicated than most LCDs...
893 */
894static ssize_t lcd_write(struct file *file, const char *buf,
895 size_t n_bytes, loff_t *pos)
896{
897 int retval = 0;
898 struct imon_context *ictx;
899
abf84383 900 ictx = file->private_data;
21677cfc
JW		 901 if (!ictx) {
902 err("%s: no context for device", __func__);
903 return -ENODEV;
904 }
905
906 mutex_lock(&ictx->lock);
907
908 if (!ictx->display_supported) {
909 err("%s: no iMON display present", __func__);
910 retval = -ENODEV;
911 goto exit;
912 }
913
914 if (n_bytes != 8) {
915 err("%s: invalid payload size: %d (expecting 8)",
916 __func__, (int) n_bytes);
917 retval = -EINVAL;
918 goto exit;
919 }
920
921 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
922 retval = -EFAULT;
923 goto exit;
924 }
925
926 retval = send_packet(ictx);
927 if (retval) {
928 err("%s: send packet failed!", __func__);
929 goto exit;
930 } else {
931 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
932 __func__, (int) n_bytes);
933 }
934exit:
935 mutex_unlock(&ictx->lock);
936 return (!retval) ? n_bytes : retval;
937}
938
939/**
940 * Callback function for USB core API: transmit data
941 */
942static void usb_tx_callback(struct urb *urb)
943{
944 struct imon_context *ictx;
945
946 if (!urb)
947 return;
948 ictx = (struct imon_context *)urb->context;
949 if (!ictx)
950 return;
951
952 ictx->tx.status = urb->status;
953
954 /* notify waiters that write has finished */
f789bf40 955 ictx->tx.busy = false;
21677cfc
JW		 956 smp_rmb(); /* ensure later readers know we're not busy */
957 complete(&ictx->tx.finished);
958}
959
960/**
961 * mce/rc6 keypresses have no distinct release code, use timer
962 */
963static void imon_mce_timeout(unsigned long data)
964{
965 struct imon_context *ictx = (struct imon_context *)data;
966
967 input_report_key(ictx->idev, ictx->last_keycode, 0);
968 input_sync(ictx->idev);
969}
970
971/**
972 * report touchscreen input
973 */
974static void imon_touch_display_timeout(unsigned long data)
975{
976 struct imon_context *ictx = (struct imon_context *)data;
977
f03900d6 978 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
21677cfc
JW		 979 return;
980
981 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
982 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
983 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
984 input_sync(ictx->touch);
985}
986
987/**
988 * iMON IR receivers support two different signal sets -- those used by
989 * the iMON remotes, and those used by the Windows MCE remotes (which is
990 * really just RC-6), but only one or the other at a time, as the signals
991 * are decoded onboard the receiver.
992 */
6718e8ad 993int imon_ir_change_protocol(void *priv, u64 ir_type)
21677cfc
JW		 994{
995 int retval;
6718e8ad 996 struct imon_context *ictx = priv;
21677cfc 997 struct device *dev = ictx->dev;
6718e8ad 998 bool pad_mouse;
21677cfc
JW		 999 unsigned char ir_proto_packet[] = {
1000 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1001
666a9ed8 1002 if (ir_type && !(ir_type & ictx->props->allowed_protos))
21677cfc
JW		 1003 dev_warn(dev, "Looks like you're trying to use an IR protocol "
1004 "this device does not support\n");
1005
6718e8ad
JW		 1006 switch (ir_type) {
1007 case IR_TYPE_RC6:
21677cfc
JW		 1008 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1009 ir_proto_packet[0] = 0x01;
6718e8ad 1010 pad_mouse = false;
21677cfc
JW		 1011 init_timer(&ictx->itimer);
1012 ictx->itimer.data = (unsigned long)ictx;
1013 ictx->itimer.function = imon_mce_timeout;
1014 break;
6718e8ad
JW		 1015 case IR_TYPE_UNKNOWN:
1016 case IR_TYPE_OTHER:
666a9ed8
JW		 1017 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1018 if (pad_stabilize)
6718e8ad 1019 pad_mouse = true;
666a9ed8
JW		 1020 else {
1021 dev_dbg(dev, "PAD stabilize functionality disabled\n");
6718e8ad
JW		 1022 pad_mouse = false;
1023 }
21677cfc 1024 /* ir_proto_packet[0] = 0x00; // already the default */
6718e8ad 1025 ir_type = IR_TYPE_OTHER;
21677cfc
JW		 1026 break;
1027 default:
6718e8ad 1028 dev_warn(dev, "Unsupported IR protocol specified, overriding "
666a9ed8
JW		 1029 "to iMON IR protocol\n");
1030 if (pad_stabilize)
6718e8ad 1031 pad_mouse = true;
666a9ed8
JW		 1032 else {
1033 dev_dbg(dev, "PAD stabilize functionality disabled\n");
6718e8ad
JW		 1034 pad_mouse = false;
1035 }
1036 /* ir_proto_packet[0] = 0x00; // already the default */
1037 ir_type = IR_TYPE_OTHER;
21677cfc
JW		 1038 break;
1039 }
1040
1041 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1042
1043 retval = send_packet(ictx);
6718e8ad
JW		 1044 if (retval)
1045 goto out;
1046
1047 ictx->ir_type = ir_type;
1048 ictx->pad_mouse = pad_mouse;
1049
1050out:
1051 return retval;
21677cfc
JW		 1052}
1053
1054static inline int tv2int(const struct timeval *a, const struct timeval *b)
1055{
1056 int usecs = 0;
1057 int sec = 0;
1058
1059 if (b->tv_usec > a->tv_usec) {
1060 usecs = 1000000;
1061 sec--;
1062 }
1063
1064 usecs += a->tv_usec - b->tv_usec;
1065
1066 sec += a->tv_sec - b->tv_sec;
1067 sec *= 1000;
1068 usecs /= 1000;
1069 sec += usecs;
1070
1071 if (sec < 0)
1072 sec = 1000;
1073
1074 return sec;
1075}
1076
1077/**
1078 * The directional pad behaves a bit differently, depending on whether this is
1079 * one of the older ffdc devices or a newer device. Newer devices appear to
1080 * have a higher resolution matrix for more precise mouse movement, but it
1081 * makes things overly sensitive in keyboard mode, so we do some interesting
1082 * contortions to make it less touchy. Older devices run through the same
1083 * routine with shorter timeout and a smaller threshold.
1084 */
1085static int stabilize(int a, int b, u16 timeout, u16 threshold)
1086{
1087 struct timeval ct;
1088 static struct timeval prev_time = {0, 0};
1089 static struct timeval hit_time = {0, 0};
1090 static int x, y, prev_result, hits;
1091 int result = 0;
1092 int msec, msec_hit;
1093
1094 do_gettimeofday(&ct);
1095 msec = tv2int(&ct, &prev_time);
1096 msec_hit = tv2int(&ct, &hit_time);
1097
1098 if (msec > 100) {
1099 x = 0;
1100 y = 0;
1101 hits = 0;
1102 }
1103
1104 x += a;
1105 y += b;
1106
1107 prev_time = ct;
1108
1109 if (abs(x) > threshold || abs(y) > threshold) {
1110 if (abs(y) > abs(x))
1111 result = (y > 0) ? 0x7F : 0x80;
1112 else
1113 result = (x > 0) ? 0x7F00 : 0x8000;
1114
1115 x = 0;
1116 y = 0;
1117
1118 if (result == prev_result) {
1119 hits++;
1120
1121 if (hits > 3) {
1122 switch (result) {
1123 case 0x7F:
1124 y = 17 * threshold / 30;
1125 break;
1126 case 0x80:
1127 y -= 17 * threshold / 30;
1128 break;
1129 case 0x7F00:
1130 x = 17 * threshold / 30;
1131 break;
1132 case 0x8000:
1133 x -= 17 * threshold / 30;
1134 break;
1135 }
1136 }
1137
1138 if (hits == 2 && msec_hit < timeout) {
1139 result = 0;
1140 hits = 1;
1141 }
1142 } else {
1143 prev_result = result;
1144 hits = 1;
1145 hit_time = ct;
1146 }
1147 }
1148
1149 return result;
1150}
1151
1152static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 hw_code)
1153{
1154 u32 scancode = be32_to_cpu(hw_code);
1155 u32 keycode;
1156 u32 release;
1157 bool is_release_code = false;
1158
1159 /* Look for the initial press of a button */
1160 keycode = ir_g_keycode_from_table(ictx->idev, scancode);
1161
1162 /* Look for the release of a button */
1163 if (keycode == KEY_RESERVED) {
1164 release = scancode & ~0x4000;
1165 keycode = ir_g_keycode_from_table(ictx->idev, release);
1166 if (keycode != KEY_RESERVED)
1167 is_release_code = true;
1168 }
1169
1170 ictx->release_code = is_release_code;
1171
1172 return keycode;
1173}
1174
1175static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 hw_code)
1176{
1177 u32 scancode = be32_to_cpu(hw_code);
1178 u32 keycode;
1179
1180#define MCE_KEY_MASK 0x7000
1181#define MCE_TOGGLE_BIT 0x8000
1182
1183 /*
1184 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1185 * (the toggle bit flipping between alternating key presses), while
1186 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1187 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1188 * but we can't or them into all codes, as some keys are decoded in
1189 * a different way w/o the same use of the toggle bit...
1190 */
1191 if ((scancode >> 24) & 0x80)
1192 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1193
1194 keycode = ir_g_keycode_from_table(ictx->idev, scancode);
1195
1196 return keycode;
1197}
1198
1199static u32 imon_panel_key_lookup(u64 hw_code)
1200{
1201 int i;
1202 u64 code = be64_to_cpu(hw_code);
083e4721 1203 u32 keycode = KEY_RESERVED;
21677cfc 1204
083e4721
JW		 1205 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1206 if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
1207 keycode = imon_panel_key_table[i].keycode;
21677cfc 1208 break;
083e4721
JW		 1209 }
1210 }
21677cfc
JW		 1211
1212 return keycode;
1213}
1214
1215static bool imon_mouse_event(struct imon_context *ictx,
1216 unsigned char *buf, int len)
1217{
1218 char rel_x = 0x00, rel_y = 0x00;
1219 u8 right_shift = 1;
f789bf40 1220 bool mouse_input = true;
21677cfc
JW		 1221 int dir = 0;
1222
1223 /* newer iMON device PAD or mouse button */
1224 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1225 rel_x = buf[2];
1226 rel_y = buf[3];
1227 right_shift = 1;
1228 /* 0xffdc iMON PAD or mouse button input */
1229 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1230 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1231 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1232 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1233 if (buf[0] & 0x02)
1234 rel_x |= ~0x0f;
1235 rel_x = rel_x + rel_x / 2;
1236 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1237 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1238 if (buf[0] & 0x01)
1239 rel_y |= ~0x0f;
1240 rel_y = rel_y + rel_y / 2;
1241 right_shift = 2;
1242 /* some ffdc devices decode mouse buttons differently... */
1243 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1244 right_shift = 2;
1245 /* ch+/- buttons, which we use for an emulated scroll wheel */
1246 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1247 dir = 1;
1248 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1249 dir = -1;
1250 } else
f789bf40 1251 mouse_input = false;
21677cfc
JW		 1252
1253 if (mouse_input) {
1254 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1255
1256 if (dir) {
1257 input_report_rel(ictx->idev, REL_WHEEL, dir);
1258 } else if (rel_x || rel_y) {
1259 input_report_rel(ictx->idev, REL_X, rel_x);
1260 input_report_rel(ictx->idev, REL_Y, rel_y);
1261 } else {
1262 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1263 input_report_key(ictx->idev, BTN_RIGHT,
1264 buf[1] >> right_shift & 0x1);
1265 }
1266 input_sync(ictx->idev);
1267 ictx->last_keycode = ictx->kc;
1268 }
1269
1270 return mouse_input;
1271}
1272
1273static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1274{
1275 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1276 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1277 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1278 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1279 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1280 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1281 input_sync(ictx->touch);
1282}
1283
1284static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1285{
1286 int dir = 0;
1287 char rel_x = 0x00, rel_y = 0x00;
1288 u16 timeout, threshold;
1289 u64 temp_key;
1290 u32 remote_key;
1291
1292 /*
1293 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1294 * contain a position coordinate (x,y), with each component ranging
1295 * from -14 to 14. We want to down-sample this to only 4 discrete values
1296 * for up/down/left/right arrow keys. Also, when you get too close to
1297 * diagonals, it has a tendancy to jump back and forth, so lets try to
1298 * ignore when they get too close.
1299 */
1300 if (ictx->product != 0xffdc) {
1301 /* first, pad to 8 bytes so it conforms with everything else */
1302 buf[5] = buf[6] = buf[7] = 0;
1303 timeout = 500; /* in msecs */
1304 /* (2*threshold) x (2*threshold) square */
1305 threshold = pad_thresh ? pad_thresh : 28;
1306 rel_x = buf[2];
1307 rel_y = buf[3];
1308
6718e8ad 1309 if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
21677cfc
JW		 1310 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1311 dir = stabilize((int)rel_x, (int)rel_y,
1312 timeout, threshold);
1313 if (!dir) {
1314 ictx->kc = KEY_UNKNOWN;
1315 return;
1316 }
1317 buf[2] = dir & 0xFF;
1318 buf[3] = (dir >> 8) & 0xFF;
1319 memcpy(&temp_key, buf, sizeof(temp_key));
1320 remote_key = (u32) (le64_to_cpu(temp_key)
1321 & 0xffffffff);
1322 ictx->kc = imon_remote_key_lookup(ictx,
1323 remote_key);
1324 }
1325 } else {
1326 if (abs(rel_y) > abs(rel_x)) {
1327 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1328 buf[3] = 0;
1329 ictx->kc = (rel_y > 0) ? KEY_DOWN : KEY_UP;
1330 } else {
1331 buf[2] = 0;
1332 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1333 ictx->kc = (rel_x > 0) ? KEY_RIGHT : 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
6718e8ad 1366 if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
21677cfc
JW		 1367 dir = stabilize((int)rel_x, (int)rel_y,
1368 timeout, threshold);
1369 if (!dir) {
1370 ictx->kc = KEY_UNKNOWN;
1371 return;
1372 }
1373 buf[2] = dir & 0xFF;
1374 buf[3] = (dir >> 8) & 0xFF;
1375 memcpy(&temp_key, buf, sizeof(temp_key));
1376 remote_key = (u32) (le64_to_cpu(temp_key) & 0xffffffff);
1377 ictx->kc = imon_remote_key_lookup(ictx, remote_key);
1378 } else {
1379 if (abs(rel_y) > abs(rel_x)) {
1380 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1381 buf[3] = 0;
1382 ictx->kc = (rel_y > 0) ? KEY_DOWN : KEY_UP;
1383 } else {
1384 buf[2] = 0;
1385 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1386 ictx->kc = (rel_x > 0) ? KEY_RIGHT : KEY_LEFT;
1387 }
1388 }
1389 }
1390}
1391
1392static int imon_parse_press_type(struct imon_context *ictx,
1393 unsigned char *buf, u8 ktype)
1394{
1395 int press_type = 0;
db190fc1
JW		 1396 int rep_delay = ictx->idev->rep[REP_DELAY];
1397 int rep_period = ictx->idev->rep[REP_PERIOD];
21677cfc
JW		 1398
1399 /* key release of 0x02XXXXXX key */
1400 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1401 ictx->kc = ictx->last_keycode;
1402
1403 /* mouse button release on (some) 0xffdc devices */
1404 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1405 buf[2] == 0x81 && buf[3] == 0xb7)
1406 ictx->kc = ictx->last_keycode;
1407
1408 /* mouse button release on (some other) 0xffdc devices */
1409 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1410 buf[2] == 0x81 && buf[3] == 0xb7)
1411 ictx->kc = ictx->last_keycode;
1412
1413 /* mce-specific button handling */
1414 else if (ktype == IMON_KEY_MCE) {
1415 /* initial press */
1416 if (ictx->kc != ictx->last_keycode
1417 || buf[2] != ictx->mce_toggle_bit) {
1418 ictx->last_keycode = ictx->kc;
1419 ictx->mce_toggle_bit = buf[2];
1420 press_type = 1;
1421 mod_timer(&ictx->itimer,
db190fc1 1422 jiffies + msecs_to_jiffies(rep_delay));
21677cfc
JW		 1423 /* repeat */
1424 } else {
1425 press_type = 2;
1426 mod_timer(&ictx->itimer,
db190fc1 1427 jiffies + msecs_to_jiffies(rep_period));
21677cfc
JW		 1428 }
1429
1430 /* incoherent or irrelevant data */
1431 } else if (ictx->kc == KEY_RESERVED)
1432 press_type = -EINVAL;
1433
1434 /* key release of 0xXXXXXXb7 key */
1435 else if (ictx->release_code)
1436 press_type = 0;
1437
1438 /* this is a button press */
1439 else
1440 press_type = 1;
1441
1442 return press_type;
1443}
1444
1445/**
1446 * Process the incoming packet
1447 */
1448static void imon_incoming_packet(struct imon_context *ictx,
1449 struct urb *urb, int intf)
1450{
1451 int len = urb->actual_length;
1452 unsigned char *buf = urb->transfer_buffer;
1453 struct device *dev = ictx->dev;
1454 u32 kc;
f789bf40 1455 bool norelease = false;
21677cfc
JW		 1456 int i;
1457 u64 temp_key;
1458 u64 panel_key = 0;
1459 u32 remote_key = 0;
1460 struct input_dev *idev = NULL;
1461 int press_type = 0;
1462 int msec;
1463 struct timeval t;
1464 static struct timeval prev_time = { 0, 0 };
1465 u8 ktype = IMON_KEY_IMON;
1466
1467 idev = ictx->idev;
1468
1469 /* filter out junk data on the older 0xffdc imon devices */
bbe4690f 1470 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
21677cfc
JW		 1471 return;
1472
1473 /* Figure out what key was pressed */
1474 memcpy(&temp_key, buf, sizeof(temp_key));
1475 if (len == 8 && buf[7] == 0xee) {
1476 ktype = IMON_KEY_PANEL;
1477 panel_key = le64_to_cpu(temp_key);
1478 kc = imon_panel_key_lookup(panel_key);
1479 } else {
1480 remote_key = (u32) (le64_to_cpu(temp_key) & 0xffffffff);
6718e8ad 1481 if (ictx->ir_type == IR_TYPE_RC6) {
21677cfc
JW		 1482 if (buf[0] == 0x80)
1483 ktype = IMON_KEY_MCE;
1484 kc = imon_mce_key_lookup(ictx, remote_key);
1485 } else
1486 kc = imon_remote_key_lookup(ictx, remote_key);
1487 }
1488
1489 /* keyboard/mouse mode toggle button */
1490 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1491 ictx->last_keycode = kc;
1492 if (!nomouse) {
1493 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1494 dev_dbg(dev, "toggling to %s mode\n",
1495 ictx->pad_mouse ? "mouse" : "keyboard");
1496 return;
1497 } else {
1498 ictx->pad_mouse = 0;
1499 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1500 }
1501 }
1502
1503 ictx->kc = kc;
1504
1505 /* send touchscreen events through input subsystem if touchpad data */
1506 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1507 buf[7] == 0x86) {
1508 imon_touch_event(ictx, buf);
1509
1510 /* look for mouse events with pad in mouse mode */
1511 } else if (ictx->pad_mouse) {
1512 if (imon_mouse_event(ictx, buf, len))
1513 return;
1514 }
1515
1516 /* Now for some special handling to convert pad input to arrow keys */
1517 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1518 ((len == 8) && (buf[0] & 0x40) &&
1519 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1520 len = 8;
1521 imon_pad_to_keys(ictx, buf);
f789bf40 1522 norelease = true;
21677cfc
JW		 1523 }
1524
1525 if (debug) {
1526 printk(KERN_INFO "intf%d decoded packet: ", intf);
1527 for (i = 0; i < len; ++i)
1528 printk("%02x ", buf[i]);
1529 printk("\n");
1530 }
1531
1532 press_type = imon_parse_press_type(ictx, buf, ktype);
1533 if (press_type < 0)
1534 goto not_input_data;
1535
1536 if (ictx->kc == KEY_UNKNOWN)
1537 goto unknown_key;
1538
1539 /* KEY_MUTE repeats from MCE and knob need to be suppressed */
1540 if ((ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode)
1541 && (buf[7] == 0xee || ktype == IMON_KEY_MCE)) {
1542 do_gettimeofday(&t);
1543 msec = tv2int(&t, &prev_time);
1544 prev_time = t;
db190fc1 1545 if (msec < idev->rep[REP_DELAY])
21677cfc
JW		 1546 return;
1547 }
1548
1549 input_report_key(idev, ictx->kc, press_type);
1550 input_sync(idev);
1551
1552 /* panel keys and some remote keys don't generate a release */
1553 if (panel_key || norelease) {
1554 input_report_key(idev, ictx->kc, 0);
1555 input_sync(idev);
1556 }
1557
1558 ictx->last_keycode = ictx->kc;
1559
1560 return;
1561
1562unknown_key:
1563 dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
1564 (panel_key ? be64_to_cpu(panel_key) :
1565 be32_to_cpu(remote_key)));
1566 return;
1567
1568not_input_data:
1569 if (len != 8) {
1570 dev_warn(dev, "imon %s: invalid incoming packet "
1571 "size (len = %d, intf%d)\n", __func__, len, intf);
1572 return;
1573 }
1574
1575 /* iMON 2.4G associate frame */
1576 if (buf[0] == 0x00 &&
1577 buf[2] == 0xFF && /* REFID */
1578 buf[3] == 0xFF &&
1579 buf[4] == 0xFF &&
1580 buf[5] == 0xFF && /* iMON 2.4G */
1581 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1582 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1583 dev_warn(dev, "%s: remote associated refid=%02X\n",
1584 __func__, buf[1]);
f789bf40 1585 ictx->rf_isassociating = false;
21677cfc
JW		 1586 }
1587}
1588
1589/**
1590 * Callback function for USB core API: receive data
1591 */
1592static void usb_rx_callback_intf0(struct urb *urb)
1593{
1594 struct imon_context *ictx;
1595 int intfnum = 0;
1596
1597 if (!urb)
1598 return;
1599
1600 ictx = (struct imon_context *)urb->context;
1601 if (!ictx)
1602 return;
1603
1604 switch (urb->status) {
1605 case -ENOENT: /* usbcore unlink successful! */
1606 return;
1607
1608 case -ESHUTDOWN: /* transport endpoint was shut down */
1609 break;
1610
1611 case 0:
1612 imon_incoming_packet(ictx, urb, intfnum);
1613 break;
1614
1615 default:
1616 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1617 __func__, urb->status);
1618 break;
1619 }
1620
1621 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1622}
1623
1624static void usb_rx_callback_intf1(struct urb *urb)
1625{
1626 struct imon_context *ictx;
1627 int intfnum = 1;
1628
1629 if (!urb)
1630 return;
1631
1632 ictx = (struct imon_context *)urb->context;
1633 if (!ictx)
1634 return;
1635
1636 switch (urb->status) {
1637 case -ENOENT: /* usbcore unlink successful! */
1638 return;
1639
1640 case -ESHUTDOWN: /* transport endpoint was shut down */
1641 break;
1642
1643 case 0:
1644 imon_incoming_packet(ictx, urb, intfnum);
1645 break;
1646
1647 default:
1648 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1649 __func__, urb->status);
1650 break;
1651 }
1652
1653 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1654}
1655
1656static struct input_dev *imon_init_idev(struct imon_context *ictx)
1657{
1658 struct input_dev *idev;
1659 struct ir_dev_props *props;
21677cfc 1660 int ret, i;
21677cfc
JW		 1661
1662 idev = input_allocate_device();
1663 if (!idev) {
1664 dev_err(ictx->dev, "remote input dev allocation failed\n");
1665 goto idev_alloc_failed;
1666 }
1667
1668 props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL);
1669 if (!props) {
1670 dev_err(ictx->dev, "remote ir dev props allocation failed\n");
1671 goto props_alloc_failed;
1672 }
1673
21677cfc
JW		 1674 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1675 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1676 idev->name = ictx->name_idev;
1677
1678 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
1679 sizeof(ictx->phys_idev));
1680 strlcat(ictx->phys_idev, "/input0", sizeof(ictx->phys_idev));
1681 idev->phys = ictx->phys_idev;
1682
db190fc1 1683 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
21677cfc
JW		 1684
1685 idev->keybit[BIT_WORD(BTN_MOUSE)] =
1686 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1687 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
1688 BIT_MASK(REL_WHEEL);
1689
1690 /* panel and/or knob code support */
1691 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1692 u32 kc = imon_panel_key_table[i].keycode;
1693 __set_bit(kc, idev->keybit);
1694 }
1695
6718e8ad 1696 props->priv = ictx;
21677cfc 1697 props->driver_type = RC_DRIVER_SCANCODE;
6718e8ad
JW		 1698 /* IR_TYPE_OTHER maps to iMON PAD remote, IR_TYPE_RC6 to MCE remote */
1699 props->allowed_protos = IR_TYPE_OTHER | IR_TYPE_RC6;
1700 props->change_protocol = imon_ir_change_protocol;
1701 ictx->props = props;
21677cfc 1702
21677cfc
JW		 1703 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
1704 idev->dev.parent = ictx->dev;
1705
6718e8ad 1706 ret = ir_input_register(idev, RC_MAP_IMON_PAD, props, MOD_NAME);
21677cfc
JW		 1707 if (ret < 0) {
1708 dev_err(ictx->dev, "remote input dev register failed\n");
1709 goto idev_register_failed;
1710 }
1711
1712 return idev;
1713
1714idev_register_failed:
21677cfc
JW		 1715 kfree(props);
1716props_alloc_failed:
1717 input_free_device(idev);
1718idev_alloc_failed:
1719
1720 return NULL;
1721}
1722
1723static struct input_dev *imon_init_touch(struct imon_context *ictx)
1724{
1725 struct input_dev *touch;
1726 int ret;
1727
1728 touch = input_allocate_device();
1729 if (!touch) {
1730 dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
1731 goto touch_alloc_failed;
1732 }
1733
1734 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
1735 "iMON USB Touchscreen (%04x:%04x)",
1736 ictx->vendor, ictx->product);
1737 touch->name = ictx->name_touch;
1738
1739 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
1740 sizeof(ictx->phys_touch));
1741 strlcat(ictx->phys_touch, "/input1", sizeof(ictx->phys_touch));
1742 touch->phys = ictx->phys_touch;
1743
1744 touch->evbit[0] =
1745 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1746 touch->keybit[BIT_WORD(BTN_TOUCH)] =
1747 BIT_MASK(BTN_TOUCH);
1748 input_set_abs_params(touch, ABS_X,
1749 0x00, 0xfff, 0, 0);
1750 input_set_abs_params(touch, ABS_Y,
1751 0x00, 0xfff, 0, 0);
1752
1753 input_set_drvdata(touch, ictx);
1754
1755 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
1756 touch->dev.parent = ictx->dev;
1757 ret = input_register_device(touch);
1758 if (ret < 0) {
1759 dev_info(ictx->dev, "touchscreen input dev register failed\n");
1760 goto touch_register_failed;
1761 }
1762
1763 return touch;
1764
1765touch_register_failed:
1766 input_free_device(ictx->touch);
21677cfc
JW		 1767
1768touch_alloc_failed:
1769 return NULL;
1770}
1771
1772static bool imon_find_endpoints(struct imon_context *ictx,
1773 struct usb_host_interface *iface_desc)
1774{
1775 struct usb_endpoint_descriptor *ep;
1776 struct usb_endpoint_descriptor *rx_endpoint = NULL;
1777 struct usb_endpoint_descriptor *tx_endpoint = NULL;
1778 int ifnum = iface_desc->desc.bInterfaceNumber;
1779 int num_endpts = iface_desc->desc.bNumEndpoints;
1780 int i, ep_dir, ep_type;
f789bf40
JW		 1781 bool ir_ep_found = false;
1782 bool display_ep_found = false;
1783 bool tx_control = false;
21677cfc
JW		 1784
1785 /*
1786 * Scan the endpoint list and set:
1787 * first input endpoint = IR endpoint
1788 * first output endpoint = display endpoint
1789 */
1790 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
1791 ep = &iface_desc->endpoint[i].desc;
1792 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1793 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
1794
1795 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
1796 ep_type == USB_ENDPOINT_XFER_INT) {
1797
1798 rx_endpoint = ep;
f789bf40 1799 ir_ep_found = true;
21677cfc
JW		 1800 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
1801
1802 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
1803 ep_type == USB_ENDPOINT_XFER_INT) {
1804 tx_endpoint = ep;
f789bf40 1805 display_ep_found = true;
21677cfc
JW		 1806 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
1807 }
1808 }
1809
1810 if (ifnum == 0) {
1811 ictx->rx_endpoint_intf0 = rx_endpoint;
1812 /*
1813 * tx is used to send characters to lcd/vfd, associate RF
1814 * remotes, set IR protocol, and maybe more...
1815 */
1816 ictx->tx_endpoint = tx_endpoint;
1817 } else {
1818 ictx->rx_endpoint_intf1 = rx_endpoint;
1819 }
1820
1821 /*
1822 * If we didn't find a display endpoint, this is probably one of the
1823 * newer iMON devices that use control urb instead of interrupt
1824 */
1825 if (!display_ep_found) {
f789bf40
JW		 1826 tx_control = true;
1827 display_ep_found = true;
21677cfc
JW		 1828 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
1829 "interface OUT endpoint\n", __func__);
1830 }
1831
1832 /*
1833 * Some iMON receivers have no display. Unfortunately, it seems
1834 * that SoundGraph recycles device IDs between devices both with
1835 * and without... :\
1836 */
1837 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
f789bf40 1838 display_ep_found = false;
21677cfc
JW		 1839 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
1840 }
1841
1842 /*
1843 * iMON Touch devices have a VGA touchscreen, but no "display", as
1844 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
1845 */
1846 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
f789bf40 1847 display_ep_found = false;
21677cfc
JW		 1848 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
1849 }
1850
1851 /* Input endpoint is mandatory */
1852 if (!ir_ep_found)
1853 err("%s: no valid input (IR) endpoint found.", __func__);
1854
1855 ictx->tx_control = tx_control;
1856
1857 if (display_ep_found)
1858 ictx->display_supported = true;
1859
1860 return ir_ep_found;
1861
1862}
1863
1864static struct imon_context *imon_init_intf0(struct usb_interface *intf)
1865{
1866 struct imon_context *ictx;
1867 struct urb *rx_urb;
1868 struct urb *tx_urb;
1869 struct device *dev = &intf->dev;
1870 struct usb_host_interface *iface_desc;
1f71baef 1871 int ret = -ENOMEM;
21677cfc
JW		 1872
1873 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
1874 if (!ictx) {
1875 dev_err(dev, "%s: kzalloc failed for context", __func__);
1876 goto exit;
1877 }
1878 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1879 if (!rx_urb) {
1880 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
1881 goto rx_urb_alloc_failed;
1882 }
1883 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1884 if (!tx_urb) {
1885 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
1886 __func__);
1887 goto tx_urb_alloc_failed;
1888 }
1889
1890 mutex_init(&ictx->lock);
1891
1892 mutex_lock(&ictx->lock);
1893
1894 ictx->dev = dev;
1895 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
f789bf40 1896 ictx->dev_present_intf0 = true;
21677cfc
JW		 1897 ictx->rx_urb_intf0 = rx_urb;
1898 ictx->tx_urb = tx_urb;
bbe4690f 1899 ictx->rf_device = false;
21677cfc
JW		 1900
1901 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
1902 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
1903
1f71baef 1904 ret = -ENODEV;
21677cfc 1905 iface_desc = intf->cur_altsetting;
1f71baef 1906 if (!imon_find_endpoints(ictx, iface_desc)) {
21677cfc 1907 goto find_endpoint_failed;
1f71baef 1908 }
21677cfc
JW		 1909
1910 ictx->idev = imon_init_idev(ictx);
1911 if (!ictx->idev) {
1912 dev_err(dev, "%s: input device setup failed\n", __func__);
1913 goto idev_setup_failed;
1914 }
1915
1916 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
1917 usb_rcvintpipe(ictx->usbdev_intf0,
1918 ictx->rx_endpoint_intf0->bEndpointAddress),
1919 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
1920 usb_rx_callback_intf0, ictx,
1921 ictx->rx_endpoint_intf0->bInterval);
1922
1923 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
1924 if (ret) {
1925 err("%s: usb_submit_urb failed for intf0 (%d)",
1926 __func__, ret);
1927 goto urb_submit_failed;
1928 }
1929
1930 return ictx;
1931
1932urb_submit_failed:
8a3fa812 1933 ir_input_unregister(ictx->idev);
21677cfc
JW		 1934idev_setup_failed:
1935find_endpoint_failed:
1936 mutex_unlock(&ictx->lock);
1937 usb_free_urb(tx_urb);
1938tx_urb_alloc_failed:
1939 usb_free_urb(rx_urb);
1940rx_urb_alloc_failed:
1941 kfree(ictx);
1942exit:
1943 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
1944
1945 return NULL;
1946}
1947
1948static struct imon_context *imon_init_intf1(struct usb_interface *intf,
1949 struct imon_context *ictx)
1950{
1951 struct urb *rx_urb;
1952 struct usb_host_interface *iface_desc;
1f71baef 1953 int ret = -ENOMEM;
21677cfc
JW		 1954
1955 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1956 if (!rx_urb) {
1957 err("%s: usb_alloc_urb failed for IR urb", __func__);
21677cfc
JW		 1958 goto rx_urb_alloc_failed;
1959 }
1960
1961 mutex_lock(&ictx->lock);
1962
1963 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
1964 init_timer(&ictx->ttimer);
1965 ictx->ttimer.data = (unsigned long)ictx;
1966 ictx->ttimer.function = imon_touch_display_timeout;
1967 }
1968
1969 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
f789bf40 1970 ictx->dev_present_intf1 = true;
21677cfc
JW		 1971 ictx->rx_urb_intf1 = rx_urb;
1972
1f71baef 1973 ret = -ENODEV;
21677cfc
JW		 1974 iface_desc = intf->cur_altsetting;
1975 if (!imon_find_endpoints(ictx, iface_desc))
1976 goto find_endpoint_failed;
1977
1978 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
1979 ictx->touch = imon_init_touch(ictx);
1980 if (!ictx->touch)
1981 goto touch_setup_failed;
1982 } else
1983 ictx->touch = NULL;
1984
1985 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
1986 usb_rcvintpipe(ictx->usbdev_intf1,
1987 ictx->rx_endpoint_intf1->bEndpointAddress),
1988 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
1989 usb_rx_callback_intf1, ictx,
1990 ictx->rx_endpoint_intf1->bInterval);
1991
1992 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
1993
1994 if (ret) {
1995 err("%s: usb_submit_urb failed for intf1 (%d)",
1996 __func__, ret);
1997 goto urb_submit_failed;
1998 }
1999
2000 return ictx;
2001
2002urb_submit_failed:
20cd1959 2003 if (ictx->touch)
21677cfc 2004 input_unregister_device(ictx->touch);
21677cfc
JW		 2005touch_setup_failed:
2006find_endpoint_failed:
2007 mutex_unlock(&ictx->lock);
2008 usb_free_urb(rx_urb);
2009rx_urb_alloc_failed:
2010 dev_err(ictx->dev, "unable to initialize intf0, err %d\n", ret);
2011
2012 return NULL;
2013}
2014
2015/*
2016 * The 0x15c2:0xffdc device ID was used for umpteen different imon
2017 * devices, and all of them constantly spew interrupts, even when there
2018 * is no actual data to report. However, byte 6 of this buffer looks like
2019 * its unique across device variants, so we're trying to key off that to
2020 * figure out which display type (if any) and what IR protocol the device
6718e8ad
JW		 2021 * actually supports. These devices have their IR protocol hard-coded into
2022 * their firmware, they can't be changed on the fly like the newer hardware.
21677cfc
JW		 2023 */
2024static void imon_get_ffdc_type(struct imon_context *ictx)
2025{
2026 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
2027 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
6718e8ad 2028 u64 allowed_protos = IR_TYPE_OTHER;
21677cfc
JW		 2029
2030 switch (ffdc_cfg_byte) {
2031 /* iMON Knob, no display, iMON IR + vol knob */
2032 case 0x21:
2033 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
2034 ictx->display_supported = false;
2035 break;
bbe4690f
JW		 2036 /* iMON 2.4G LT (usb stick), no display, iMON RF */
2037 case 0x4e:
2038 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
2039 ictx->display_supported = false;
2040 ictx->rf_device = true;
2041 break;
21677cfc
JW		 2042 /* iMON VFD, no IR (does have vol knob tho) */
2043 case 0x35:
2044 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
2045 detected_display_type = IMON_DISPLAY_TYPE_VFD;
21677cfc
JW		 2046 break;
2047 /* iMON VFD, iMON IR */
2048 case 0x24:
2049 case 0x85:
2050 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
2051 detected_display_type = IMON_DISPLAY_TYPE_VFD;
2052 break;
2053 /* iMON LCD, MCE IR */
49da8be5 2054 case 0x9e:
21677cfc
JW		 2055 case 0x9f:
2056 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
2057 detected_display_type = IMON_DISPLAY_TYPE_LCD;
6718e8ad 2058 allowed_protos = IR_TYPE_RC6;
21677cfc
JW		 2059 break;
2060 default:
2061 dev_info(ictx->dev, "Unknown 0xffdc device, "
2062 "defaulting to VFD and iMON IR");
2063 detected_display_type = IMON_DISPLAY_TYPE_VFD;
2064 break;
2065 }
2066
6718e8ad 2067 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
21677cfc
JW		 2068
2069 ictx->display_type = detected_display_type;
6718e8ad
JW		 2070 ictx->props->allowed_protos = allowed_protos;
2071 ictx->ir_type = allowed_protos;
21677cfc
JW		 2072}
2073
2074static void imon_set_display_type(struct imon_context *ictx,
2075 struct usb_interface *intf)
2076{
2077 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
2078
2079 /*
2080 * Try to auto-detect the type of display if the user hasn't set
2081 * it by hand via the display_type modparam. Default is VFD.
2082 */
2083
2084 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
2085 switch (ictx->product) {
2086 case 0xffdc:
2087 /* set in imon_get_ffdc_type() */
2088 configured_display_type = ictx->display_type;
2089 break;
2090 case 0x0034:
2091 case 0x0035:
2092 configured_display_type = IMON_DISPLAY_TYPE_VGA;
2093 break;
2094 case 0x0038:
2095 case 0x0039:
2096 case 0x0045:
2097 configured_display_type = IMON_DISPLAY_TYPE_LCD;
2098 break;
2099 case 0x003c:
2100 case 0x0041:
2101 case 0x0042:
2102 case 0x0043:
2103 configured_display_type = IMON_DISPLAY_TYPE_NONE;
2104 ictx->display_supported = false;
2105 break;
2106 case 0x0036:
2107 case 0x0044:
2108 default:
2109 configured_display_type = IMON_DISPLAY_TYPE_VFD;
2110 break;
2111 }
2112 } else {
2113 configured_display_type = display_type;
2114 if (display_type == IMON_DISPLAY_TYPE_NONE)
2115 ictx->display_supported = false;
2116 else
2117 ictx->display_supported = true;
2118 dev_info(ictx->dev, "%s: overriding display type to %d via "
2119 "modparam\n", __func__, display_type);
2120 }
2121
2122 ictx->display_type = configured_display_type;
2123}
2124
2125static void imon_init_display(struct imon_context *ictx,
2126 struct usb_interface *intf)
2127{
2128 int ret;
2129
2130 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2131
2132 /* set up sysfs entry for built-in clock */
2133 ret = sysfs_create_group(&intf->dev.kobj,
2134 &imon_display_attribute_group);
2135 if (ret)
2136 dev_err(ictx->dev, "Could not create display sysfs "
2137 "entries(%d)", ret);
2138
2139 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2140 ret = usb_register_dev(intf, &imon_lcd_class);
2141 else
2142 ret = usb_register_dev(intf, &imon_vfd_class);
2143 if (ret)
2144 /* Not a fatal error, so ignore */
2145 dev_info(ictx->dev, "could not get a minor number for "
2146 "display\n");
2147
2148}
2149
2150/**
2151 * Callback function for USB core API: Probe
2152 */
2153static int __devinit imon_probe(struct usb_interface *interface,
2154 const struct usb_device_id *id)
2155{
2156 struct usb_device *usbdev = NULL;
2157 struct usb_host_interface *iface_desc = NULL;
2158 struct usb_interface *first_if;
2159 struct device *dev = &interface->dev;
2160 int ifnum, code_length, sysfs_err;
2161 int ret = 0;
2162 struct imon_context *ictx = NULL;
2163 struct imon_context *first_if_ctx = NULL;
2164 u16 vendor, product;
2165 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
2166 0x00, 0x00, 0x00, 0x88 };
2167
2168 code_length = BUF_CHUNK_SIZE * 8;
2169
2170 usbdev = usb_get_dev(interface_to_usbdev(interface));
2171 iface_desc = interface->cur_altsetting;
2172 ifnum = iface_desc->desc.bInterfaceNumber;
2173 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2174 product = le16_to_cpu(usbdev->descriptor.idProduct);
2175
2176 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2177 __func__, vendor, product, ifnum);
2178
2179 /* prevent races probing devices w/multiple interfaces */
2180 mutex_lock(&driver_lock);
2181
2182 first_if = usb_ifnum_to_if(usbdev, 0);
2183 first_if_ctx = (struct imon_context *)usb_get_intfdata(first_if);
2184
2185 if (ifnum == 0) {
2186 ictx = imon_init_intf0(interface);
2187 if (!ictx) {
2188 err("%s: failed to initialize context!\n", __func__);
2189 ret = -ENODEV;
2190 goto fail;
2191 }
2192
21677cfc
JW		 2193 } else {
2194 /* this is the secondary interface on the device */
2195 ictx = imon_init_intf1(interface, first_if_ctx);
2196 if (!ictx) {
2197 err("%s: failed to attach to context!\n", __func__);
2198 ret = -ENODEV;
2199 goto fail;
2200 }
2201
2202 }
2203
2204 usb_set_intfdata(interface, ictx);
2205
2206 if (ifnum == 0) {
2207 /* Enable front-panel buttons and/or knobs */
2208 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
2209 ret = send_packet(ictx);
2210 /* Not fatal, but warn about it */
2211 if (ret)
2212 dev_info(dev, "failed to enable panel buttons "
2213 "and/or knobs\n");
2214
2215 if (product == 0xffdc)
2216 imon_get_ffdc_type(ictx);
21677cfc
JW		 2217
2218 imon_set_display_type(ictx, interface);
2219
bbe4690f
JW		 2220 if (product == 0xffdc && ictx->rf_device) {
2221 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2222 &imon_rf_attribute_group);
2223 if (sysfs_err)
2224 err("%s: Could not create RF sysfs entries(%d)",
2225 __func__, sysfs_err);
2226 }
2227
21677cfc
JW		 2228 if (ictx->display_supported)
2229 imon_init_display(ictx, interface);
2230 }
2231
2232 /* set IR protocol/remote type */
6718e8ad
JW		 2233 ret = imon_ir_change_protocol(ictx, ictx->ir_type);
2234 if (ret) {
2235 dev_warn(dev, "%s: failed to set IR protocol, falling back "
2236 "to standard iMON protocol mode\n", __func__);
2237 ictx->ir_type = IR_TYPE_OTHER;
2238 }
21677cfc
JW		 2239
2240 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2241 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2242 usbdev->bus->busnum, usbdev->devnum);
2243
2244 mutex_unlock(&ictx->lock);
2245 mutex_unlock(&driver_lock);
2246
2247 return 0;
2248
2249fail:
2250 mutex_unlock(&driver_lock);
2251 dev_err(dev, "unable to register, err %d\n", ret);
2252
2253 return ret;
2254}
2255
2256/**
2257 * Callback function for USB core API: disconnect
2258 */
2259static void __devexit imon_disconnect(struct usb_interface *interface)
2260{
2261 struct imon_context *ictx;
2262 struct device *dev;
2263 int ifnum;
2264
2265 /* prevent races with multi-interface device probing and display_open */
2266 mutex_lock(&driver_lock);
2267
2268 ictx = usb_get_intfdata(interface);
2269 dev = ictx->dev;
2270 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2271
2272 mutex_lock(&ictx->lock);
2273
2274 /*
2275 * sysfs_remove_group is safe to call even if sysfs_create_group
2276 * hasn't been called
2277 */
2278 sysfs_remove_group(&interface->dev.kobj,
2279 &imon_display_attribute_group);
2280 sysfs_remove_group(&interface->dev.kobj,
2281 &imon_rf_attribute_group);
2282
2283 usb_set_intfdata(interface, NULL);
2284
2285 /* Abort ongoing write */
2286 if (ictx->tx.busy) {
2287 usb_kill_urb(ictx->tx_urb);
2288 complete_all(&ictx->tx.finished);
2289 }
2290
2291 if (ifnum == 0) {
f789bf40 2292 ictx->dev_present_intf0 = false;
21677cfc 2293 usb_kill_urb(ictx->rx_urb_intf0);
8a3fa812 2294 ir_input_unregister(ictx->idev);
21677cfc
JW		 2295 if (ictx->display_supported) {
2296 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2297 usb_deregister_dev(interface, &imon_lcd_class);
2298 else
2299 usb_deregister_dev(interface, &imon_vfd_class);
2300 }
2301 } else {
f789bf40 2302 ictx->dev_present_intf1 = false;
21677cfc
JW		 2303 usb_kill_urb(ictx->rx_urb_intf1);
2304 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2305 input_unregister_device(ictx->touch);
2306 }
2307
2308 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) {
2309 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2310 del_timer_sync(&ictx->ttimer);
2311 mutex_unlock(&ictx->lock);
2312 if (!ictx->display_isopen)
2313 free_imon_context(ictx);
2314 } else {
6718e8ad 2315 if (ictx->ir_type == IR_TYPE_RC6)
21677cfc
JW		 2316 del_timer_sync(&ictx->itimer);
2317 mutex_unlock(&ictx->lock);
2318 }
2319
2320 mutex_unlock(&driver_lock);
2321
2322 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2323 __func__, ifnum);
2324}
2325
2326static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2327{
2328 struct imon_context *ictx = usb_get_intfdata(intf);
2329 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2330
2331 if (ifnum == 0)
2332 usb_kill_urb(ictx->rx_urb_intf0);
2333 else
2334 usb_kill_urb(ictx->rx_urb_intf1);
2335
2336 return 0;
2337}
2338
2339static int imon_resume(struct usb_interface *intf)
2340{
2341 int rc = 0;
2342 struct imon_context *ictx = usb_get_intfdata(intf);
2343 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2344
2345 if (ifnum == 0) {
2346 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2347 usb_rcvintpipe(ictx->usbdev_intf0,
2348 ictx->rx_endpoint_intf0->bEndpointAddress),
2349 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2350 usb_rx_callback_intf0, ictx,
2351 ictx->rx_endpoint_intf0->bInterval);
2352
2353 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2354
2355 } else {
2356 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2357 usb_rcvintpipe(ictx->usbdev_intf1,
2358 ictx->rx_endpoint_intf1->bEndpointAddress),
2359 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2360 usb_rx_callback_intf1, ictx,
2361 ictx->rx_endpoint_intf1->bInterval);
2362
2363 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2364 }
2365
2366 return rc;
2367}
2368
2369static int __init imon_init(void)
2370{
2371 int rc;
2372
2373 rc = usb_register(&imon_driver);
2374 if (rc) {
2375 err("%s: usb register failed(%d)", __func__, rc);
2376 rc = -ENODEV;
2377 }
2378
2379 return rc;
2380}
2381
2382static void __exit imon_exit(void)
2383{
2384 usb_deregister(&imon_driver);
2385}
2386
2387module_init(imon_init);
2388module_exit(imon_exit);
Linux kernel - Deliverables
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