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[net-next-2.6.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;
90 struct ir_input_dev *ir;
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_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,
154 .release = &display_close
155};
156
157/* lcd character device file operations */
158static const struct file_operations lcd_fops = {
159 .owner = THIS_MODULE,
160 .open = &display_open,
161 .write = &lcd_write,
162 .release = &display_close
163};
164
165enum {
166 IMON_DISPLAY_TYPE_AUTO = 0,
167 IMON_DISPLAY_TYPE_VFD = 1,
168 IMON_DISPLAY_TYPE_LCD = 2,
169 IMON_DISPLAY_TYPE_VGA = 3,
170 IMON_DISPLAY_TYPE_NONE = 4,
171};
172
21677cfc
JW		 173enum {
174 IMON_KEY_IMON = 0,
175 IMON_KEY_MCE = 1,
176 IMON_KEY_PANEL = 2,
177};
178
179/*
180 * USB Device ID for iMON USB Control Boards
181 *
182 * The Windows drivers contain 6 different inf files, more or less one for
183 * each new device until the 0x0034-0x0046 devices, which all use the same
184 * driver. Some of the devices in the 34-46 range haven't been definitively
185 * identified yet. Early devices have either a TriGem Computer, Inc. or a
186 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
187 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
188 * the ffdc and later devices, which do onboard decoding.
189 */
190static struct usb_device_id imon_usb_id_table[] = {
191 /*
192 * Several devices with this same device ID, all use iMON_PAD.inf
193 * SoundGraph iMON PAD (IR & VFD)
194 * SoundGraph iMON PAD (IR & LCD)
195 * SoundGraph iMON Knob (IR only)
196 */
197 { USB_DEVICE(0x15c2, 0xffdc) },
198
199 /*
200 * Newer devices, all driven by the latest iMON Windows driver, full
201 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
202 * Need user input to fill in details on unknown devices.
203 */
204 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
205 { USB_DEVICE(0x15c2, 0x0034) },
206 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
207 { USB_DEVICE(0x15c2, 0x0035) },
208 /* SoundGraph iMON OEM VFD (IR & VFD) */
209 { USB_DEVICE(0x15c2, 0x0036) },
210 /* device specifics unknown */
211 { USB_DEVICE(0x15c2, 0x0037) },
212 /* SoundGraph iMON OEM LCD (IR & LCD) */
213 { USB_DEVICE(0x15c2, 0x0038) },
214 /* SoundGraph iMON UltraBay (IR & LCD) */
215 { USB_DEVICE(0x15c2, 0x0039) },
216 /* device specifics unknown */
217 { USB_DEVICE(0x15c2, 0x003a) },
218 /* device specifics unknown */
219 { USB_DEVICE(0x15c2, 0x003b) },
220 /* SoundGraph iMON OEM Inside (IR only) */
221 { USB_DEVICE(0x15c2, 0x003c) },
222 /* device specifics unknown */
223 { USB_DEVICE(0x15c2, 0x003d) },
224 /* device specifics unknown */
225 { USB_DEVICE(0x15c2, 0x003e) },
226 /* device specifics unknown */
227 { USB_DEVICE(0x15c2, 0x003f) },
228 /* device specifics unknown */
229 { USB_DEVICE(0x15c2, 0x0040) },
230 /* SoundGraph iMON MINI (IR only) */
231 { USB_DEVICE(0x15c2, 0x0041) },
232 /* Antec Veris Multimedia Station EZ External (IR only) */
233 { USB_DEVICE(0x15c2, 0x0042) },
234 /* Antec Veris Multimedia Station Basic Internal (IR only) */
235 { USB_DEVICE(0x15c2, 0x0043) },
236 /* Antec Veris Multimedia Station Elite (IR & VFD) */
237 { USB_DEVICE(0x15c2, 0x0044) },
238 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
239 { USB_DEVICE(0x15c2, 0x0045) },
240 /* device specifics unknown */
241 { USB_DEVICE(0x15c2, 0x0046) },
242 {}
243};
244
245/* USB Device data */
246static struct usb_driver imon_driver = {
247 .name = MOD_NAME,
248 .probe = imon_probe,
249 .disconnect = imon_disconnect,
250 .suspend = imon_suspend,
251 .resume = imon_resume,
252 .id_table = imon_usb_id_table,
253};
254
255static struct usb_class_driver imon_vfd_class = {
256 .name = DEVICE_NAME,
257 .fops = &vfd_fops,
258 .minor_base = DISPLAY_MINOR_BASE,
259};
260
261static struct usb_class_driver imon_lcd_class = {
262 .name = DEVICE_NAME,
263 .fops = &lcd_fops,
264 .minor_base = DISPLAY_MINOR_BASE,
265};
266
267/* imon receiver front panel/knob key table */
268static const struct {
269 u64 hw_code;
270 u32 keycode;
271} imon_panel_key_table[] = {
1f71baef
MCC		 272 { 0x000000000f00ffeell, KEY_PROG1 }, /* Go */
273 { 0x000000001f00ffeell, KEY_AUDIO },
274 { 0x000000002000ffeell, KEY_VIDEO },
275 { 0x000000002100ffeell, KEY_CAMERA },
276 { 0x000000002700ffeell, KEY_DVD },
277 { 0x000000002300ffeell, KEY_TV },
278 { 0x000000000500ffeell, KEY_PREVIOUS },
279 { 0x000000000700ffeell, KEY_REWIND },
280 { 0x000000000400ffeell, KEY_STOP },
281 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
282 { 0x000000000800ffeell, KEY_FASTFORWARD },
283 { 0x000000000600ffeell, KEY_NEXT },
284 { 0x000000010000ffeell, KEY_RIGHT },
285 { 0x000001000000ffeell, KEY_LEFT },
286 { 0x000000003d00ffeell, KEY_SELECT },
287 { 0x000100000000ffeell, KEY_VOLUMEUP },
288 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
289 { 0x000000000100ffeell, KEY_MUTE },
21677cfc 290 /* iMON Knob values */
1f71baef
MCC		 291 { 0x000100ffffffffeell, KEY_VOLUMEUP },
292 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
293 { 0x000008ffffffffeell, KEY_MUTE },
21677cfc
JW		 294};
295
296/* to prevent races between open() and disconnect(), probing, etc */
297static DEFINE_MUTEX(driver_lock);
298
299/* Module bookkeeping bits */
300MODULE_AUTHOR(MOD_AUTHOR);
301MODULE_DESCRIPTION(MOD_DESC);
302MODULE_VERSION(MOD_VERSION);
303MODULE_LICENSE("GPL");
304MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
305
306static bool debug;
307module_param(debug, bool, S_IRUGO | S_IWUSR);
308MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)");
309
310/* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
311static int display_type;
312module_param(display_type, int, S_IRUGO);
313MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
314 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
315
6718e8ad
JW		 316static int pad_stabilize = 1;
317module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
318MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
319 "presses in arrow key mode. 0=disable, 1=enable (default).");
21677cfc
JW		 320
321/*
322 * In certain use cases, mouse mode isn't really helpful, and could actually
323 * cause confusion, so allow disabling it when the IR device is open.
324 */
325static bool nomouse;
326module_param(nomouse, bool, S_IRUGO | S_IWUSR);
327MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
328 "open. 0=don't disable, 1=disable. (default: don't disable)");
329
330/* threshold at which a pad push registers as an arrow key in kbd mode */
331static int pad_thresh;
332module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
333MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
334 "arrow key in kbd mode (default: 28)");
335
336
337static void free_imon_context(struct imon_context *ictx)
338{
339 struct device *dev = ictx->dev;
340
341 usb_free_urb(ictx->tx_urb);
342 usb_free_urb(ictx->rx_urb_intf0);
343 usb_free_urb(ictx->rx_urb_intf1);
344 kfree(ictx);
345
346 dev_dbg(dev, "%s: iMON context freed\n", __func__);
347}
348
349/**
350 * Called when the Display device (e.g. /dev/lcd0)
351 * is opened by the application.
352 */
353static int display_open(struct inode *inode, struct file *file)
354{
355 struct usb_interface *interface;
356 struct imon_context *ictx = NULL;
357 int subminor;
358 int retval = 0;
359
360 /* prevent races with disconnect */
361 mutex_lock(&driver_lock);
362
363 subminor = iminor(inode);
364 interface = usb_find_interface(&imon_driver, subminor);
365 if (!interface) {
366 err("%s: could not find interface for minor %d",
367 __func__, subminor);
368 retval = -ENODEV;
369 goto exit;
370 }
371 ictx = usb_get_intfdata(interface);
372
373 if (!ictx) {
374 err("%s: no context found for minor %d", __func__, subminor);
375 retval = -ENODEV;
376 goto exit;
377 }
378
379 mutex_lock(&ictx->lock);
380
381 if (!ictx->display_supported) {
382 err("%s: display not supported by device", __func__);
383 retval = -ENODEV;
384 } else if (ictx->display_isopen) {
385 err("%s: display port is already open", __func__);
386 retval = -EBUSY;
387 } else {
388 ictx->display_isopen = 1;
389 file->private_data = ictx;
390 dev_dbg(ictx->dev, "display port opened\n");
391 }
392
393 mutex_unlock(&ictx->lock);
394
395exit:
396 mutex_unlock(&driver_lock);
397 return retval;
398}
399
400/**
401 * Called when the display device (e.g. /dev/lcd0)
402 * is closed by the application.
403 */
404static int display_close(struct inode *inode, struct file *file)
405{
406 struct imon_context *ictx = NULL;
407 int retval = 0;
408
409 ictx = (struct imon_context *)file->private_data;
410
411 if (!ictx) {
412 err("%s: no context for device", __func__);
413 return -ENODEV;
414 }
415
416 mutex_lock(&ictx->lock);
417
418 if (!ictx->display_supported) {
419 err("%s: display not supported by device", __func__);
420 retval = -ENODEV;
421 } else if (!ictx->display_isopen) {
422 err("%s: display is not open", __func__);
423 retval = -EIO;
424 } else {
425 ictx->display_isopen = 0;
426 dev_dbg(ictx->dev, "display port closed\n");
427 if (!ictx->dev_present_intf0) {
428 /*
429 * Device disconnected before close and IR port is not
430 * open. If IR port is open, context will be deleted by
431 * ir_close.
432 */
433 mutex_unlock(&ictx->lock);
434 free_imon_context(ictx);
435 return retval;
436 }
437 }
438
439 mutex_unlock(&ictx->lock);
440 return retval;
441}
442
443/**
444 * Sends a packet to the device -- this function must be called
445 * with ictx->lock held.
446 */
447static int send_packet(struct imon_context *ictx)
448{
449 unsigned int pipe;
450 unsigned long timeout;
451 int interval = 0;
452 int retval = 0;
453 struct usb_ctrlrequest *control_req = NULL;
454
455 /* Check if we need to use control or interrupt urb */
456 if (!ictx->tx_control) {
457 pipe = usb_sndintpipe(ictx->usbdev_intf0,
458 ictx->tx_endpoint->bEndpointAddress);
459 interval = ictx->tx_endpoint->bInterval;
460
461 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
462 ictx->usb_tx_buf,
463 sizeof(ictx->usb_tx_buf),
464 usb_tx_callback, ictx, interval);
465
466 ictx->tx_urb->actual_length = 0;
467 } else {
468 /* fill request into kmalloc'ed space: */
469 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
470 GFP_KERNEL);
471 if (control_req == NULL)
472 return -ENOMEM;
473
474 /* setup packet is '21 09 0200 0001 0008' */
475 control_req->bRequestType = 0x21;
476 control_req->bRequest = 0x09;
477 control_req->wValue = cpu_to_le16(0x0200);
478 control_req->wIndex = cpu_to_le16(0x0001);
479 control_req->wLength = cpu_to_le16(0x0008);
480
481 /* control pipe is endpoint 0x00 */
482 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
483
484 /* build the control urb */
485 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
486 pipe, (unsigned char *)control_req,
487 ictx->usb_tx_buf,
488 sizeof(ictx->usb_tx_buf),
489 usb_tx_callback, ictx);
490 ictx->tx_urb->actual_length = 0;
491 }
492
493 init_completion(&ictx->tx.finished);
494 ictx->tx.busy = 1;
495 smp_rmb(); /* ensure later readers know we're busy */
496
497 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
498 if (retval) {
499 ictx->tx.busy = 0;
500 smp_rmb(); /* ensure later readers know we're not busy */
501 err("%s: error submitting urb(%d)", __func__, retval);
502 } else {
503 /* Wait for transmission to complete (or abort) */
504 mutex_unlock(&ictx->lock);
505 retval = wait_for_completion_interruptible(
506 &ictx->tx.finished);
507 if (retval)
508 err("%s: task interrupted", __func__);
509 mutex_lock(&ictx->lock);
510
511 retval = ictx->tx.status;
512 if (retval)
513 err("%s: packet tx failed (%d)", __func__, retval);
514 }
515
516 kfree(control_req);
517
518 /*
519 * Induce a mandatory 5ms delay before returning, as otherwise,
520 * send_packet can get called so rapidly as to overwhelm the device,
521 * particularly on faster systems and/or those with quirky usb.
522 */
523 timeout = msecs_to_jiffies(5);
524 set_current_state(TASK_UNINTERRUPTIBLE);
525 schedule_timeout(timeout);
526
527 return retval;
528}
529
530/**
531 * Sends an associate packet to the iMON 2.4G.
532 *
533 * This might not be such a good idea, since it has an id collision with
534 * some versions of the "IR & VFD" combo. The only way to determine if it
535 * is an RF version is to look at the product description string. (Which
536 * we currently do not fetch).
537 */
538static int send_associate_24g(struct imon_context *ictx)
539{
540 int retval;
541 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
542 0x00, 0x00, 0x00, 0x20 };
543
544 if (!ictx) {
545 err("%s: no context for device", __func__);
546 return -ENODEV;
547 }
548
549 if (!ictx->dev_present_intf0) {
550 err("%s: no iMON device present", __func__);
551 return -ENODEV;
552 }
553
554 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
555 retval = send_packet(ictx);
556
557 return retval;
558}
559
560/**
561 * Sends packets to setup and show clock on iMON display
562 *
563 * Arguments: year - last 2 digits of year, month - 1..12,
564 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
565 * hour - 0..23, minute - 0..59, second - 0..59
566 */
567static int send_set_imon_clock(struct imon_context *ictx,
568 unsigned int year, unsigned int month,
569 unsigned int day, unsigned int dow,
570 unsigned int hour, unsigned int minute,
571 unsigned int second)
572{
573 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
574 int retval = 0;
575 int i;
576
577 if (!ictx) {
578 err("%s: no context for device", __func__);
579 return -ENODEV;
580 }
581
582 switch (ictx->display_type) {
583 case IMON_DISPLAY_TYPE_LCD:
584 clock_enable_pkt[0][0] = 0x80;
585 clock_enable_pkt[0][1] = year;
586 clock_enable_pkt[0][2] = month-1;
587 clock_enable_pkt[0][3] = day;
588 clock_enable_pkt[0][4] = hour;
589 clock_enable_pkt[0][5] = minute;
590 clock_enable_pkt[0][6] = second;
591
592 clock_enable_pkt[1][0] = 0x80;
593 clock_enable_pkt[1][1] = 0;
594 clock_enable_pkt[1][2] = 0;
595 clock_enable_pkt[1][3] = 0;
596 clock_enable_pkt[1][4] = 0;
597 clock_enable_pkt[1][5] = 0;
598 clock_enable_pkt[1][6] = 0;
599
600 if (ictx->product == 0xffdc) {
601 clock_enable_pkt[0][7] = 0x50;
602 clock_enable_pkt[1][7] = 0x51;
603 } else {
604 clock_enable_pkt[0][7] = 0x88;
605 clock_enable_pkt[1][7] = 0x8a;
606 }
607
608 break;
609
610 case IMON_DISPLAY_TYPE_VFD:
611 clock_enable_pkt[0][0] = year;
612 clock_enable_pkt[0][1] = month-1;
613 clock_enable_pkt[0][2] = day;
614 clock_enable_pkt[0][3] = dow;
615 clock_enable_pkt[0][4] = hour;
616 clock_enable_pkt[0][5] = minute;
617 clock_enable_pkt[0][6] = second;
618 clock_enable_pkt[0][7] = 0x40;
619
620 clock_enable_pkt[1][0] = 0;
621 clock_enable_pkt[1][1] = 0;
622 clock_enable_pkt[1][2] = 1;
623 clock_enable_pkt[1][3] = 0;
624 clock_enable_pkt[1][4] = 0;
625 clock_enable_pkt[1][5] = 0;
626 clock_enable_pkt[1][6] = 0;
627 clock_enable_pkt[1][7] = 0x42;
628
629 break;
630
631 default:
632 return -ENODEV;
633 }
634
635 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
636 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
637 retval = send_packet(ictx);
638 if (retval) {
639 err("%s: send_packet failed for packet %d",
640 __func__, i);
641 break;
642 }
643 }
644
645 return retval;
646}
647
648/**
649 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
650 */
651static ssize_t show_associate_remote(struct device *d,
652 struct device_attribute *attr,
653 char *buf)
654{
655 struct imon_context *ictx = dev_get_drvdata(d);
656
657 if (!ictx)
658 return -ENODEV;
659
660 mutex_lock(&ictx->lock);
661 if (ictx->rf_isassociating)
662 strcpy(buf, "associating\n");
663 else
664 strcpy(buf, "closed\n");
665
666 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
667 "instructions on how to associate your iMON 2.4G DT/LT "
668 "remote\n");
669 mutex_unlock(&ictx->lock);
670 return strlen(buf);
671}
672
673static ssize_t store_associate_remote(struct device *d,
674 struct device_attribute *attr,
675 const char *buf, size_t count)
676{
677 struct imon_context *ictx;
678
679 ictx = dev_get_drvdata(d);
680
681 if (!ictx)
682 return -ENODEV;
683
684 mutex_lock(&ictx->lock);
685 ictx->rf_isassociating = 1;
686 send_associate_24g(ictx);
687 mutex_unlock(&ictx->lock);
688
689 return count;
690}
691
692/**
693 * sysfs functions to control internal imon clock
694 */
695static ssize_t show_imon_clock(struct device *d,
696 struct device_attribute *attr, char *buf)
697{
698 struct imon_context *ictx = dev_get_drvdata(d);
699 size_t len;
700
701 if (!ictx)
702 return -ENODEV;
703
704 mutex_lock(&ictx->lock);
705
706 if (!ictx->display_supported) {
707 len = snprintf(buf, PAGE_SIZE, "Not supported.");
708 } else {
709 len = snprintf(buf, PAGE_SIZE,
710 "To set the clock on your iMON display:\n"
711 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
712 "%s", ictx->display_isopen ?
713 "\nNOTE: imon device must be closed\n" : "");
714 }
715
716 mutex_unlock(&ictx->lock);
717
718 return len;
719}
720
721static ssize_t store_imon_clock(struct device *d,
722 struct device_attribute *attr,
723 const char *buf, size_t count)
724{
725 struct imon_context *ictx = dev_get_drvdata(d);
726 ssize_t retval;
727 unsigned int year, month, day, dow, hour, minute, second;
728
729 if (!ictx)
730 return -ENODEV;
731
732 mutex_lock(&ictx->lock);
733
734 if (!ictx->display_supported) {
735 retval = -ENODEV;
736 goto exit;
737 } else if (ictx->display_isopen) {
738 retval = -EBUSY;
739 goto exit;
740 }
741
742 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
743 &hour, &minute, &second) != 7) {
744 retval = -EINVAL;
745 goto exit;
746 }
747
748 if ((month < 1 || month > 12) ||
749 (day < 1 || day > 31) || (dow > 6) ||
750 (hour > 23) || (minute > 59) || (second > 59)) {
751 retval = -EINVAL;
752 goto exit;
753 }
754
755 retval = send_set_imon_clock(ictx, year, month, day, dow,
756 hour, minute, second);
757 if (retval)
758 goto exit;
759
760 retval = count;
761exit:
762 mutex_unlock(&ictx->lock);
763
764 return retval;
765}
766
767
768static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
769 store_imon_clock);
770
771static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
772 store_associate_remote);
773
774static struct attribute *imon_display_sysfs_entries[] = {
775 &dev_attr_imon_clock.attr,
776 NULL
777};
778
779static struct attribute_group imon_display_attribute_group = {
780 .attrs = imon_display_sysfs_entries
781};
782
783static struct attribute *imon_rf_sysfs_entries[] = {
784 &dev_attr_associate_remote.attr,
785 NULL
786};
787
788static struct attribute_group imon_rf_attribute_group = {
789 .attrs = imon_rf_sysfs_entries
790};
791
792/**
793 * Writes data to the VFD. The iMON VFD is 2x16 characters
794 * and requires data in 5 consecutive USB interrupt packets,
795 * each packet but the last carrying 7 bytes.
796 *
797 * I don't know if the VFD board supports features such as
798 * scrolling, clearing rows, blanking, etc. so at
799 * the caller must provide a full screen of data. If fewer
800 * than 32 bytes are provided spaces will be appended to
801 * generate a full screen.
802 */
803static ssize_t vfd_write(struct file *file, const char *buf,
804 size_t n_bytes, loff_t *pos)
805{
806 int i;
807 int offset;
808 int seq;
809 int retval = 0;
810 struct imon_context *ictx;
811 const unsigned char vfd_packet6[] = {
812 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
813
814 ictx = (struct imon_context *)file->private_data;
815 if (!ictx) {
816 err("%s: no context for device", __func__);
817 return -ENODEV;
818 }
819
820 mutex_lock(&ictx->lock);
821
822 if (!ictx->dev_present_intf0) {
823 err("%s: no iMON device present", __func__);
824 retval = -ENODEV;
825 goto exit;
826 }
827
828 if (n_bytes <= 0 || n_bytes > 32) {
829 err("%s: invalid payload size", __func__);
830 retval = -EINVAL;
831 goto exit;
832 }
833
834 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
835 retval = -EFAULT;
836 goto exit;
837 }
838
839 /* Pad with spaces */
840 for (i = n_bytes; i < 32; ++i)
841 ictx->tx.data_buf[i] = ' ';
842
843 for (i = 32; i < 35; ++i)
844 ictx->tx.data_buf[i] = 0xFF;
845
846 offset = 0;
847 seq = 0;
848
849 do {
850 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
851 ictx->usb_tx_buf[7] = (unsigned char) seq;
852
853 retval = send_packet(ictx);
854 if (retval) {
855 err("%s: send packet failed for packet #%d",
856 __func__, seq/2);
857 goto exit;
858 } else {
859 seq += 2;
860 offset += 7;
861 }
862
863 } while (offset < 35);
864
865 /* Send packet #6 */
866 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
867 ictx->usb_tx_buf[7] = (unsigned char) seq;
868 retval = send_packet(ictx);
869 if (retval)
870 err("%s: send packet failed for packet #%d",
871 __func__, seq / 2);
872
873exit:
874 mutex_unlock(&ictx->lock);
875
876 return (!retval) ? n_bytes : retval;
877}
878
879/**
880 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
881 * packets. We accept data as 16 hexadecimal digits, followed by a
882 * newline (to make it easy to drive the device from a command-line
883 * -- even though the actual binary data is a bit complicated).
884 *
885 * The device itself is not a "traditional" text-mode display. It's
886 * actually a 16x96 pixel bitmap display. That means if you want to
887 * display text, you've got to have your own "font" and translate the
888 * text into bitmaps for display. This is really flexible (you can
889 * display whatever diacritics you need, and so on), but it's also
890 * a lot more complicated than most LCDs...
891 */
892static ssize_t lcd_write(struct file *file, const char *buf,
893 size_t n_bytes, loff_t *pos)
894{
895 int retval = 0;
896 struct imon_context *ictx;
897
898 ictx = (struct imon_context *)file->private_data;
899 if (!ictx) {
900 err("%s: no context for device", __func__);
901 return -ENODEV;
902 }
903
904 mutex_lock(&ictx->lock);
905
906 if (!ictx->display_supported) {
907 err("%s: no iMON display present", __func__);
908 retval = -ENODEV;
909 goto exit;
910 }
911
912 if (n_bytes != 8) {
913 err("%s: invalid payload size: %d (expecting 8)",
914 __func__, (int) n_bytes);
915 retval = -EINVAL;
916 goto exit;
917 }
918
919 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
920 retval = -EFAULT;
921 goto exit;
922 }
923
924 retval = send_packet(ictx);
925 if (retval) {
926 err("%s: send packet failed!", __func__);
927 goto exit;
928 } else {
929 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
930 __func__, (int) n_bytes);
931 }
932exit:
933 mutex_unlock(&ictx->lock);
934 return (!retval) ? n_bytes : retval;
935}
936
937/**
938 * Callback function for USB core API: transmit data
939 */
940static void usb_tx_callback(struct urb *urb)
941{
942 struct imon_context *ictx;
943
944 if (!urb)
945 return;
946 ictx = (struct imon_context *)urb->context;
947 if (!ictx)
948 return;
949
950 ictx->tx.status = urb->status;
951
952 /* notify waiters that write has finished */
953 ictx->tx.busy = 0;
954 smp_rmb(); /* ensure later readers know we're not busy */
955 complete(&ictx->tx.finished);
956}
957
958/**
959 * mce/rc6 keypresses have no distinct release code, use timer
960 */
961static void imon_mce_timeout(unsigned long data)
962{
963 struct imon_context *ictx = (struct imon_context *)data;
964
965 input_report_key(ictx->idev, ictx->last_keycode, 0);
966 input_sync(ictx->idev);
967}
968
969/**
970 * report touchscreen input
971 */
972static void imon_touch_display_timeout(unsigned long data)
973{
974 struct imon_context *ictx = (struct imon_context *)data;
975
f03900d6 976 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
21677cfc
JW		 977 return;
978
979 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
980 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
981 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
982 input_sync(ictx->touch);
983}
984
985/**
986 * iMON IR receivers support two different signal sets -- those used by
987 * the iMON remotes, and those used by the Windows MCE remotes (which is
988 * really just RC-6), but only one or the other at a time, as the signals
989 * are decoded onboard the receiver.
990 */
6718e8ad 991int imon_ir_change_protocol(void *priv, u64 ir_type)
21677cfc
JW		 992{
993 int retval;
6718e8ad 994 struct imon_context *ictx = priv;
21677cfc 995 struct device *dev = ictx->dev;
6718e8ad 996 bool pad_mouse;
21677cfc
JW		 997 unsigned char ir_proto_packet[] = {
998 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
999
666a9ed8 1000 if (ir_type && !(ir_type & ictx->props->allowed_protos))
21677cfc
JW		 1001 dev_warn(dev, "Looks like you're trying to use an IR protocol "
1002 "this device does not support\n");
1003
6718e8ad
JW		 1004 switch (ir_type) {
1005 case IR_TYPE_RC6:
21677cfc
JW		 1006 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1007 ir_proto_packet[0] = 0x01;
6718e8ad 1008 pad_mouse = false;
21677cfc
JW		 1009 init_timer(&ictx->itimer);
1010 ictx->itimer.data = (unsigned long)ictx;
1011 ictx->itimer.function = imon_mce_timeout;
1012 break;
6718e8ad
JW		 1013 case IR_TYPE_UNKNOWN:
1014 case IR_TYPE_OTHER:
666a9ed8
JW		 1015 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1016 if (pad_stabilize)
6718e8ad 1017 pad_mouse = true;
666a9ed8
JW		 1018 else {
1019 dev_dbg(dev, "PAD stabilize functionality disabled\n");
6718e8ad
JW		 1020 pad_mouse = false;
1021 }
21677cfc 1022 /* ir_proto_packet[0] = 0x00; // already the default */
6718e8ad 1023 ir_type = IR_TYPE_OTHER;
21677cfc
JW		 1024 break;
1025 default:
6718e8ad 1026 dev_warn(dev, "Unsupported IR protocol specified, overriding "
666a9ed8
JW		 1027 "to iMON IR protocol\n");
1028 if (pad_stabilize)
6718e8ad 1029 pad_mouse = true;
666a9ed8
JW		 1030 else {
1031 dev_dbg(dev, "PAD stabilize functionality disabled\n");
6718e8ad
JW		 1032 pad_mouse = false;
1033 }
1034 /* ir_proto_packet[0] = 0x00; // already the default */
1035 ir_type = IR_TYPE_OTHER;
21677cfc
JW		 1036 break;
1037 }
1038
1039 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1040
1041 retval = send_packet(ictx);
6718e8ad
JW		 1042 if (retval)
1043 goto out;
1044
1045 ictx->ir_type = ir_type;
1046 ictx->pad_mouse = pad_mouse;
1047
1048out:
1049 return retval;
21677cfc
JW		 1050}
1051
1052static inline int tv2int(const struct timeval *a, const struct timeval *b)
1053{
1054 int usecs = 0;
1055 int sec = 0;
1056
1057 if (b->tv_usec > a->tv_usec) {
1058 usecs = 1000000;
1059 sec--;
1060 }
1061
1062 usecs += a->tv_usec - b->tv_usec;
1063
1064 sec += a->tv_sec - b->tv_sec;
1065 sec *= 1000;
1066 usecs /= 1000;
1067 sec += usecs;
1068
1069 if (sec < 0)
1070 sec = 1000;
1071
1072 return sec;
1073}
1074
1075/**
1076 * The directional pad behaves a bit differently, depending on whether this is
1077 * one of the older ffdc devices or a newer device. Newer devices appear to
1078 * have a higher resolution matrix for more precise mouse movement, but it
1079 * makes things overly sensitive in keyboard mode, so we do some interesting
1080 * contortions to make it less touchy. Older devices run through the same
1081 * routine with shorter timeout and a smaller threshold.
1082 */
1083static int stabilize(int a, int b, u16 timeout, u16 threshold)
1084{
1085 struct timeval ct;
1086 static struct timeval prev_time = {0, 0};
1087 static struct timeval hit_time = {0, 0};
1088 static int x, y, prev_result, hits;
1089 int result = 0;
1090 int msec, msec_hit;
1091
1092 do_gettimeofday(&ct);
1093 msec = tv2int(&ct, &prev_time);
1094 msec_hit = tv2int(&ct, &hit_time);
1095
1096 if (msec > 100) {
1097 x = 0;
1098 y = 0;
1099 hits = 0;
1100 }
1101
1102 x += a;
1103 y += b;
1104
1105 prev_time = ct;
1106
1107 if (abs(x) > threshold || abs(y) > threshold) {
1108 if (abs(y) > abs(x))
1109 result = (y > 0) ? 0x7F : 0x80;
1110 else
1111 result = (x > 0) ? 0x7F00 : 0x8000;
1112
1113 x = 0;
1114 y = 0;
1115
1116 if (result == prev_result) {
1117 hits++;
1118
1119 if (hits > 3) {
1120 switch (result) {
1121 case 0x7F:
1122 y = 17 * threshold / 30;
1123 break;
1124 case 0x80:
1125 y -= 17 * threshold / 30;
1126 break;
1127 case 0x7F00:
1128 x = 17 * threshold / 30;
1129 break;
1130 case 0x8000:
1131 x -= 17 * threshold / 30;
1132 break;
1133 }
1134 }
1135
1136 if (hits == 2 && msec_hit < timeout) {
1137 result = 0;
1138 hits = 1;
1139 }
1140 } else {
1141 prev_result = result;
1142 hits = 1;
1143 hit_time = ct;
1144 }
1145 }
1146
1147 return result;
1148}
1149
1150static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 hw_code)
1151{
1152 u32 scancode = be32_to_cpu(hw_code);
1153 u32 keycode;
1154 u32 release;
1155 bool is_release_code = false;
1156
1157 /* Look for the initial press of a button */
1158 keycode = ir_g_keycode_from_table(ictx->idev, scancode);
1159
1160 /* Look for the release of a button */
1161 if (keycode == KEY_RESERVED) {
1162 release = scancode & ~0x4000;
1163 keycode = ir_g_keycode_from_table(ictx->idev, release);
1164 if (keycode != KEY_RESERVED)
1165 is_release_code = true;
1166 }
1167
1168 ictx->release_code = is_release_code;
1169
1170 return keycode;
1171}
1172
1173static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 hw_code)
1174{
1175 u32 scancode = be32_to_cpu(hw_code);
1176 u32 keycode;
1177
1178#define MCE_KEY_MASK 0x7000
1179#define MCE_TOGGLE_BIT 0x8000
1180
1181 /*
1182 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1183 * (the toggle bit flipping between alternating key presses), while
1184 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1185 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1186 * but we can't or them into all codes, as some keys are decoded in
1187 * a different way w/o the same use of the toggle bit...
1188 */
1189 if ((scancode >> 24) & 0x80)
1190 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1191
1192 keycode = ir_g_keycode_from_table(ictx->idev, scancode);
1193
1194 return keycode;
1195}
1196
1197static u32 imon_panel_key_lookup(u64 hw_code)
1198{
1199 int i;
1200 u64 code = be64_to_cpu(hw_code);
083e4721 1201 u32 keycode = KEY_RESERVED;
21677cfc 1202
083e4721
JW		 1203 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1204 if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
1205 keycode = imon_panel_key_table[i].keycode;
21677cfc 1206 break;
083e4721
JW		 1207 }
1208 }
21677cfc
JW		 1209
1210 return keycode;
1211}
1212
1213static bool imon_mouse_event(struct imon_context *ictx,
1214 unsigned char *buf, int len)
1215{
1216 char rel_x = 0x00, rel_y = 0x00;
1217 u8 right_shift = 1;
1218 bool mouse_input = 1;
1219 int dir = 0;
1220
1221 /* newer iMON device PAD or mouse button */
1222 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1223 rel_x = buf[2];
1224 rel_y = buf[3];
1225 right_shift = 1;
1226 /* 0xffdc iMON PAD or mouse button input */
1227 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1228 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1229 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1230 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1231 if (buf[0] & 0x02)
1232 rel_x |= ~0x0f;
1233 rel_x = rel_x + rel_x / 2;
1234 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1235 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1236 if (buf[0] & 0x01)
1237 rel_y |= ~0x0f;
1238 rel_y = rel_y + rel_y / 2;
1239 right_shift = 2;
1240 /* some ffdc devices decode mouse buttons differently... */
1241 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1242 right_shift = 2;
1243 /* ch+/- buttons, which we use for an emulated scroll wheel */
1244 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1245 dir = 1;
1246 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1247 dir = -1;
1248 } else
1249 mouse_input = 0;
1250
1251 if (mouse_input) {
1252 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1253
1254 if (dir) {
1255 input_report_rel(ictx->idev, REL_WHEEL, dir);
1256 } else if (rel_x || rel_y) {
1257 input_report_rel(ictx->idev, REL_X, rel_x);
1258 input_report_rel(ictx->idev, REL_Y, rel_y);
1259 } else {
1260 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1261 input_report_key(ictx->idev, BTN_RIGHT,
1262 buf[1] >> right_shift & 0x1);
1263 }
1264 input_sync(ictx->idev);
1265 ictx->last_keycode = ictx->kc;
1266 }
1267
1268 return mouse_input;
1269}
1270
1271static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1272{
1273 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1274 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1275 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1276 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1277 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1278 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1279 input_sync(ictx->touch);
1280}
1281
1282static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1283{
1284 int dir = 0;
1285 char rel_x = 0x00, rel_y = 0x00;
1286 u16 timeout, threshold;
1287 u64 temp_key;
1288 u32 remote_key;
1289
1290 /*
1291 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1292 * contain a position coordinate (x,y), with each component ranging
1293 * from -14 to 14. We want to down-sample this to only 4 discrete values
1294 * for up/down/left/right arrow keys. Also, when you get too close to
1295 * diagonals, it has a tendancy to jump back and forth, so lets try to
1296 * ignore when they get too close.
1297 */
1298 if (ictx->product != 0xffdc) {
1299 /* first, pad to 8 bytes so it conforms with everything else */
1300 buf[5] = buf[6] = buf[7] = 0;
1301 timeout = 500; /* in msecs */
1302 /* (2*threshold) x (2*threshold) square */
1303 threshold = pad_thresh ? pad_thresh : 28;
1304 rel_x = buf[2];
1305 rel_y = buf[3];
1306
6718e8ad 1307 if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
21677cfc
JW		 1308 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1309 dir = stabilize((int)rel_x, (int)rel_y,
1310 timeout, threshold);
1311 if (!dir) {
1312 ictx->kc = KEY_UNKNOWN;
1313 return;
1314 }
1315 buf[2] = dir & 0xFF;
1316 buf[3] = (dir >> 8) & 0xFF;
1317 memcpy(&temp_key, buf, sizeof(temp_key));
1318 remote_key = (u32) (le64_to_cpu(temp_key)
1319 & 0xffffffff);
1320 ictx->kc = imon_remote_key_lookup(ictx,
1321 remote_key);
1322 }
1323 } else {
1324 if (abs(rel_y) > abs(rel_x)) {
1325 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1326 buf[3] = 0;
1327 ictx->kc = (rel_y > 0) ? KEY_DOWN : KEY_UP;
1328 } else {
1329 buf[2] = 0;
1330 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1331 ictx->kc = (rel_x > 0) ? KEY_RIGHT : KEY_LEFT;
1332 }
1333 }
1334
1335 /*
1336 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1337 * device (15c2:ffdc). The remote generates various codes from
1338 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1339 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1340 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1341 * reversed endianess. Extract direction from buffer, rotate endianess,
1342 * adjust sign and feed the values into stabilize(). The resulting codes
1343 * will be 0x01008000, 0x01007F00, which match the newer devices.
1344 */
1345 } else {
1346 timeout = 10; /* in msecs */
1347 /* (2*threshold) x (2*threshold) square */
1348 threshold = pad_thresh ? pad_thresh : 15;
1349
1350 /* buf[1] is x */
1351 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1352 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1353 if (buf[0] & 0x02)
1354 rel_x |= ~0x10+1;
1355 /* buf[2] is y */
1356 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1357 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1358 if (buf[0] & 0x01)
1359 rel_y |= ~0x10+1;
1360
1361 buf[0] = 0x01;
1362 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1363
6718e8ad 1364 if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
21677cfc
JW		 1365 dir = stabilize((int)rel_x, (int)rel_y,
1366 timeout, threshold);
1367 if (!dir) {
1368 ictx->kc = KEY_UNKNOWN;
1369 return;
1370 }
1371 buf[2] = dir & 0xFF;
1372 buf[3] = (dir >> 8) & 0xFF;
1373 memcpy(&temp_key, buf, sizeof(temp_key));
1374 remote_key = (u32) (le64_to_cpu(temp_key) & 0xffffffff);
1375 ictx->kc = imon_remote_key_lookup(ictx, remote_key);
1376 } else {
1377 if (abs(rel_y) > abs(rel_x)) {
1378 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1379 buf[3] = 0;
1380 ictx->kc = (rel_y > 0) ? KEY_DOWN : KEY_UP;
1381 } else {
1382 buf[2] = 0;
1383 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1384 ictx->kc = (rel_x > 0) ? KEY_RIGHT : KEY_LEFT;
1385 }
1386 }
1387 }
1388}
1389
1390static int imon_parse_press_type(struct imon_context *ictx,
1391 unsigned char *buf, u8 ktype)
1392{
1393 int press_type = 0;
db190fc1
JW		 1394 int rep_delay = ictx->idev->rep[REP_DELAY];
1395 int rep_period = ictx->idev->rep[REP_PERIOD];
21677cfc
JW		 1396
1397 /* key release of 0x02XXXXXX key */
1398 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1399 ictx->kc = ictx->last_keycode;
1400
1401 /* mouse button release on (some) 0xffdc devices */
1402 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1403 buf[2] == 0x81 && buf[3] == 0xb7)
1404 ictx->kc = ictx->last_keycode;
1405
1406 /* mouse button release on (some other) 0xffdc devices */
1407 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1408 buf[2] == 0x81 && buf[3] == 0xb7)
1409 ictx->kc = ictx->last_keycode;
1410
1411 /* mce-specific button handling */
1412 else if (ktype == IMON_KEY_MCE) {
1413 /* initial press */
1414 if (ictx->kc != ictx->last_keycode
1415 || buf[2] != ictx->mce_toggle_bit) {
1416 ictx->last_keycode = ictx->kc;
1417 ictx->mce_toggle_bit = buf[2];
1418 press_type = 1;
1419 mod_timer(&ictx->itimer,
db190fc1 1420 jiffies + msecs_to_jiffies(rep_delay));
21677cfc
JW		 1421 /* repeat */
1422 } else {
1423 press_type = 2;
1424 mod_timer(&ictx->itimer,
db190fc1 1425 jiffies + msecs_to_jiffies(rep_period));
21677cfc
JW		 1426 }
1427
1428 /* incoherent or irrelevant data */
1429 } else if (ictx->kc == KEY_RESERVED)
1430 press_type = -EINVAL;
1431
1432 /* key release of 0xXXXXXXb7 key */
1433 else if (ictx->release_code)
1434 press_type = 0;
1435
1436 /* this is a button press */
1437 else
1438 press_type = 1;
1439
1440 return press_type;
1441}
1442
1443/**
1444 * Process the incoming packet
1445 */
1446static void imon_incoming_packet(struct imon_context *ictx,
1447 struct urb *urb, int intf)
1448{
1449 int len = urb->actual_length;
1450 unsigned char *buf = urb->transfer_buffer;
1451 struct device *dev = ictx->dev;
1452 u32 kc;
1453 bool norelease = 0;
1454 int i;
1455 u64 temp_key;
1456 u64 panel_key = 0;
1457 u32 remote_key = 0;
1458 struct input_dev *idev = NULL;
1459 int press_type = 0;
1460 int msec;
1461 struct timeval t;
1462 static struct timeval prev_time = { 0, 0 };
1463 u8 ktype = IMON_KEY_IMON;
1464
1465 idev = ictx->idev;
1466
1467 /* filter out junk data on the older 0xffdc imon devices */
1468 if ((buf[0] == 0xff) && (buf[7] == 0xff))
1469 return;
1470
1471 /* Figure out what key was pressed */
1472 memcpy(&temp_key, buf, sizeof(temp_key));
1473 if (len == 8 && buf[7] == 0xee) {
1474 ktype = IMON_KEY_PANEL;
1475 panel_key = le64_to_cpu(temp_key);
1476 kc = imon_panel_key_lookup(panel_key);
1477 } else {
1478 remote_key = (u32) (le64_to_cpu(temp_key) & 0xffffffff);
6718e8ad 1479 if (ictx->ir_type == IR_TYPE_RC6) {
21677cfc
JW		 1480 if (buf[0] == 0x80)
1481 ktype = IMON_KEY_MCE;
1482 kc = imon_mce_key_lookup(ictx, remote_key);
1483 } else
1484 kc = imon_remote_key_lookup(ictx, remote_key);
1485 }
1486
1487 /* keyboard/mouse mode toggle button */
1488 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1489 ictx->last_keycode = kc;
1490 if (!nomouse) {
1491 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1492 dev_dbg(dev, "toggling to %s mode\n",
1493 ictx->pad_mouse ? "mouse" : "keyboard");
1494 return;
1495 } else {
1496 ictx->pad_mouse = 0;
1497 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1498 }
1499 }
1500
1501 ictx->kc = kc;
1502
1503 /* send touchscreen events through input subsystem if touchpad data */
1504 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1505 buf[7] == 0x86) {
1506 imon_touch_event(ictx, buf);
1507
1508 /* look for mouse events with pad in mouse mode */
1509 } else if (ictx->pad_mouse) {
1510 if (imon_mouse_event(ictx, buf, len))
1511 return;
1512 }
1513
1514 /* Now for some special handling to convert pad input to arrow keys */
1515 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1516 ((len == 8) && (buf[0] & 0x40) &&
1517 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1518 len = 8;
1519 imon_pad_to_keys(ictx, buf);
1520 norelease = 1;
1521 }
1522
1523 if (debug) {
1524 printk(KERN_INFO "intf%d decoded packet: ", intf);
1525 for (i = 0; i < len; ++i)
1526 printk("%02x ", buf[i]);
1527 printk("\n");
1528 }
1529
1530 press_type = imon_parse_press_type(ictx, buf, ktype);
1531 if (press_type < 0)
1532 goto not_input_data;
1533
1534 if (ictx->kc == KEY_UNKNOWN)
1535 goto unknown_key;
1536
1537 /* KEY_MUTE repeats from MCE and knob need to be suppressed */
1538 if ((ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode)
1539 && (buf[7] == 0xee || ktype == IMON_KEY_MCE)) {
1540 do_gettimeofday(&t);
1541 msec = tv2int(&t, &prev_time);
1542 prev_time = t;
db190fc1 1543 if (msec < idev->rep[REP_DELAY])
21677cfc
JW		 1544 return;
1545 }
1546
1547 input_report_key(idev, ictx->kc, press_type);
1548 input_sync(idev);
1549
1550 /* panel keys and some remote keys don't generate a release */
1551 if (panel_key || norelease) {
1552 input_report_key(idev, ictx->kc, 0);
1553 input_sync(idev);
1554 }
1555
1556 ictx->last_keycode = ictx->kc;
1557
1558 return;
1559
1560unknown_key:
1561 dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
1562 (panel_key ? be64_to_cpu(panel_key) :
1563 be32_to_cpu(remote_key)));
1564 return;
1565
1566not_input_data:
1567 if (len != 8) {
1568 dev_warn(dev, "imon %s: invalid incoming packet "
1569 "size (len = %d, intf%d)\n", __func__, len, intf);
1570 return;
1571 }
1572
1573 /* iMON 2.4G associate frame */
1574 if (buf[0] == 0x00 &&
1575 buf[2] == 0xFF && /* REFID */
1576 buf[3] == 0xFF &&
1577 buf[4] == 0xFF &&
1578 buf[5] == 0xFF && /* iMON 2.4G */
1579 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1580 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1581 dev_warn(dev, "%s: remote associated refid=%02X\n",
1582 __func__, buf[1]);
1583 ictx->rf_isassociating = 0;
1584 }
1585}
1586
1587/**
1588 * Callback function for USB core API: receive data
1589 */
1590static void usb_rx_callback_intf0(struct urb *urb)
1591{
1592 struct imon_context *ictx;
1593 int intfnum = 0;
1594
1595 if (!urb)
1596 return;
1597
1598 ictx = (struct imon_context *)urb->context;
1599 if (!ictx)
1600 return;
1601
1602 switch (urb->status) {
1603 case -ENOENT: /* usbcore unlink successful! */
1604 return;
1605
1606 case -ESHUTDOWN: /* transport endpoint was shut down */
1607 break;
1608
1609 case 0:
1610 imon_incoming_packet(ictx, urb, intfnum);
1611 break;
1612
1613 default:
1614 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1615 __func__, urb->status);
1616 break;
1617 }
1618
1619 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1620}
1621
1622static void usb_rx_callback_intf1(struct urb *urb)
1623{
1624 struct imon_context *ictx;
1625 int intfnum = 1;
1626
1627 if (!urb)
1628 return;
1629
1630 ictx = (struct imon_context *)urb->context;
1631 if (!ictx)
1632 return;
1633
1634 switch (urb->status) {
1635 case -ENOENT: /* usbcore unlink successful! */
1636 return;
1637
1638 case -ESHUTDOWN: /* transport endpoint was shut down */
1639 break;
1640
1641 case 0:
1642 imon_incoming_packet(ictx, urb, intfnum);
1643 break;
1644
1645 default:
1646 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1647 __func__, urb->status);
1648 break;
1649 }
1650
1651 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1652}
1653
1654static struct input_dev *imon_init_idev(struct imon_context *ictx)
1655{
1656 struct input_dev *idev;
1657 struct ir_dev_props *props;
1658 struct ir_input_dev *ir;
1659 int ret, i;
21677cfc
JW		 1660
1661 idev = input_allocate_device();
1662 if (!idev) {
1663 dev_err(ictx->dev, "remote input dev allocation failed\n");
1664 goto idev_alloc_failed;
1665 }
1666
1667 props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL);
1668 if (!props) {
1669 dev_err(ictx->dev, "remote ir dev props allocation failed\n");
1670 goto props_alloc_failed;
1671 }
1672
1673 ir = kzalloc(sizeof(struct ir_input_dev), GFP_KERNEL);
5f6e3c8e 1674 if (!ir) {
21677cfc
JW		 1675 dev_err(ictx->dev, "remote ir input dev allocation failed\n");
1676 goto ir_dev_alloc_failed;
1677 }
1678
1679 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1680 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1681 idev->name = ictx->name_idev;
1682
1683 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
1684 sizeof(ictx->phys_idev));
1685 strlcat(ictx->phys_idev, "/input0", sizeof(ictx->phys_idev));
1686 idev->phys = ictx->phys_idev;
1687
db190fc1 1688 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
21677cfc
JW		 1689
1690 idev->keybit[BIT_WORD(BTN_MOUSE)] =
1691 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1692 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
1693 BIT_MASK(REL_WHEEL);
1694
1695 /* panel and/or knob code support */
1696 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1697 u32 kc = imon_panel_key_table[i].keycode;
1698 __set_bit(kc, idev->keybit);
1699 }
1700
6718e8ad 1701 props->priv = ictx;
21677cfc 1702 props->driver_type = RC_DRIVER_SCANCODE;
6718e8ad
JW		 1703 /* IR_TYPE_OTHER maps to iMON PAD remote, IR_TYPE_RC6 to MCE remote */
1704 props->allowed_protos = IR_TYPE_OTHER | IR_TYPE_RC6;
1705 props->change_protocol = imon_ir_change_protocol;
1706 ictx->props = props;
21677cfc
JW		 1707
1708 ictx->ir = ir;
1709 memcpy(&ir->dev, ictx->dev, sizeof(struct device));
1710
1711 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
1712 idev->dev.parent = ictx->dev;
1713
1714 input_set_drvdata(idev, ir);
1715
6718e8ad 1716 ret = ir_input_register(idev, RC_MAP_IMON_PAD, props, MOD_NAME);
21677cfc
JW		 1717 if (ret < 0) {
1718 dev_err(ictx->dev, "remote input dev register failed\n");
1719 goto idev_register_failed;
1720 }
1721
1722 return idev;
1723
1724idev_register_failed:
1725 kfree(ir);
1726ir_dev_alloc_failed:
1727 kfree(props);
1728props_alloc_failed:
1729 input_free_device(idev);
1730idev_alloc_failed:
1731
1732 return NULL;
1733}
1734
1735static struct input_dev *imon_init_touch(struct imon_context *ictx)
1736{
1737 struct input_dev *touch;
1738 int ret;
1739
1740 touch = input_allocate_device();
1741 if (!touch) {
1742 dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
1743 goto touch_alloc_failed;
1744 }
1745
1746 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
1747 "iMON USB Touchscreen (%04x:%04x)",
1748 ictx->vendor, ictx->product);
1749 touch->name = ictx->name_touch;
1750
1751 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
1752 sizeof(ictx->phys_touch));
1753 strlcat(ictx->phys_touch, "/input1", sizeof(ictx->phys_touch));
1754 touch->phys = ictx->phys_touch;
1755
1756 touch->evbit[0] =
1757 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1758 touch->keybit[BIT_WORD(BTN_TOUCH)] =
1759 BIT_MASK(BTN_TOUCH);
1760 input_set_abs_params(touch, ABS_X,
1761 0x00, 0xfff, 0, 0);
1762 input_set_abs_params(touch, ABS_Y,
1763 0x00, 0xfff, 0, 0);
1764
1765 input_set_drvdata(touch, ictx);
1766
1767 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
1768 touch->dev.parent = ictx->dev;
1769 ret = input_register_device(touch);
1770 if (ret < 0) {
1771 dev_info(ictx->dev, "touchscreen input dev register failed\n");
1772 goto touch_register_failed;
1773 }
1774
1775 return touch;
1776
1777touch_register_failed:
1778 input_free_device(ictx->touch);
21677cfc
JW		 1779
1780touch_alloc_failed:
1781 return NULL;
1782}
1783
1784static bool imon_find_endpoints(struct imon_context *ictx,
1785 struct usb_host_interface *iface_desc)
1786{
1787 struct usb_endpoint_descriptor *ep;
1788 struct usb_endpoint_descriptor *rx_endpoint = NULL;
1789 struct usb_endpoint_descriptor *tx_endpoint = NULL;
1790 int ifnum = iface_desc->desc.bInterfaceNumber;
1791 int num_endpts = iface_desc->desc.bNumEndpoints;
1792 int i, ep_dir, ep_type;
1793 bool ir_ep_found = 0;
1794 bool display_ep_found = 0;
1795 bool tx_control = 0;
1796
1797 /*
1798 * Scan the endpoint list and set:
1799 * first input endpoint = IR endpoint
1800 * first output endpoint = display endpoint
1801 */
1802 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
1803 ep = &iface_desc->endpoint[i].desc;
1804 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1805 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
1806
1807 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
1808 ep_type == USB_ENDPOINT_XFER_INT) {
1809
1810 rx_endpoint = ep;
1811 ir_ep_found = 1;
1812 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
1813
1814 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
1815 ep_type == USB_ENDPOINT_XFER_INT) {
1816 tx_endpoint = ep;
1817 display_ep_found = 1;
1818 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
1819 }
1820 }
1821
1822 if (ifnum == 0) {
1823 ictx->rx_endpoint_intf0 = rx_endpoint;
1824 /*
1825 * tx is used to send characters to lcd/vfd, associate RF
1826 * remotes, set IR protocol, and maybe more...
1827 */
1828 ictx->tx_endpoint = tx_endpoint;
1829 } else {
1830 ictx->rx_endpoint_intf1 = rx_endpoint;
1831 }
1832
1833 /*
1834 * If we didn't find a display endpoint, this is probably one of the
1835 * newer iMON devices that use control urb instead of interrupt
1836 */
1837 if (!display_ep_found) {
1838 tx_control = 1;
1839 display_ep_found = 1;
1840 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
1841 "interface OUT endpoint\n", __func__);
1842 }
1843
1844 /*
1845 * Some iMON receivers have no display. Unfortunately, it seems
1846 * that SoundGraph recycles device IDs between devices both with
1847 * and without... :\
1848 */
1849 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
1850 display_ep_found = 0;
1851 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
1852 }
1853
1854 /*
1855 * iMON Touch devices have a VGA touchscreen, but no "display", as
1856 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
1857 */
1858 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
1859 display_ep_found = 0;
1860 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
1861 }
1862
1863 /* Input endpoint is mandatory */
1864 if (!ir_ep_found)
1865 err("%s: no valid input (IR) endpoint found.", __func__);
1866
1867 ictx->tx_control = tx_control;
1868
1869 if (display_ep_found)
1870 ictx->display_supported = true;
1871
1872 return ir_ep_found;
1873
1874}
1875
1876static struct imon_context *imon_init_intf0(struct usb_interface *intf)
1877{
1878 struct imon_context *ictx;
1879 struct urb *rx_urb;
1880 struct urb *tx_urb;
1881 struct device *dev = &intf->dev;
1882 struct usb_host_interface *iface_desc;
1f71baef 1883 int ret = -ENOMEM;
21677cfc
JW		 1884
1885 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
1886 if (!ictx) {
1887 dev_err(dev, "%s: kzalloc failed for context", __func__);
1888 goto exit;
1889 }
1890 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1891 if (!rx_urb) {
1892 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
1893 goto rx_urb_alloc_failed;
1894 }
1895 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1896 if (!tx_urb) {
1897 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
1898 __func__);
1899 goto tx_urb_alloc_failed;
1900 }
1901
1902 mutex_init(&ictx->lock);
1903
1904 mutex_lock(&ictx->lock);
1905
1906 ictx->dev = dev;
1907 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
1908 ictx->dev_present_intf0 = 1;
1909 ictx->rx_urb_intf0 = rx_urb;
1910 ictx->tx_urb = tx_urb;
1911
1912 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
1913 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
1914
1f71baef 1915 ret = -ENODEV;
21677cfc 1916 iface_desc = intf->cur_altsetting;
1f71baef 1917 if (!imon_find_endpoints(ictx, iface_desc)) {
21677cfc 1918 goto find_endpoint_failed;
1f71baef 1919 }
21677cfc
JW		 1920
1921 ictx->idev = imon_init_idev(ictx);
1922 if (!ictx->idev) {
1923 dev_err(dev, "%s: input device setup failed\n", __func__);
1924 goto idev_setup_failed;
1925 }
1926
1927 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
1928 usb_rcvintpipe(ictx->usbdev_intf0,
1929 ictx->rx_endpoint_intf0->bEndpointAddress),
1930 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
1931 usb_rx_callback_intf0, ictx,
1932 ictx->rx_endpoint_intf0->bInterval);
1933
1934 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
1935 if (ret) {
1936 err("%s: usb_submit_urb failed for intf0 (%d)",
1937 __func__, ret);
1938 goto urb_submit_failed;
1939 }
1940
1941 return ictx;
1942
1943urb_submit_failed:
1944 input_unregister_device(ictx->idev);
1945 input_free_device(ictx->idev);
1946idev_setup_failed:
1947find_endpoint_failed:
1948 mutex_unlock(&ictx->lock);
1949 usb_free_urb(tx_urb);
1950tx_urb_alloc_failed:
1951 usb_free_urb(rx_urb);
1952rx_urb_alloc_failed:
1953 kfree(ictx);
1954exit:
1955 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
1956
1957 return NULL;
1958}
1959
1960static struct imon_context *imon_init_intf1(struct usb_interface *intf,
1961 struct imon_context *ictx)
1962{
1963 struct urb *rx_urb;
1964 struct usb_host_interface *iface_desc;
1f71baef 1965 int ret = -ENOMEM;
21677cfc
JW		 1966
1967 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1968 if (!rx_urb) {
1969 err("%s: usb_alloc_urb failed for IR urb", __func__);
21677cfc
JW		 1970 goto rx_urb_alloc_failed;
1971 }
1972
1973 mutex_lock(&ictx->lock);
1974
1975 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
1976 init_timer(&ictx->ttimer);
1977 ictx->ttimer.data = (unsigned long)ictx;
1978 ictx->ttimer.function = imon_touch_display_timeout;
1979 }
1980
1981 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
1982 ictx->dev_present_intf1 = 1;
1983 ictx->rx_urb_intf1 = rx_urb;
1984
1f71baef 1985 ret = -ENODEV;
21677cfc
JW		 1986 iface_desc = intf->cur_altsetting;
1987 if (!imon_find_endpoints(ictx, iface_desc))
1988 goto find_endpoint_failed;
1989
1990 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
1991 ictx->touch = imon_init_touch(ictx);
1992 if (!ictx->touch)
1993 goto touch_setup_failed;
1994 } else
1995 ictx->touch = NULL;
1996
1997 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
1998 usb_rcvintpipe(ictx->usbdev_intf1,
1999 ictx->rx_endpoint_intf1->bEndpointAddress),
2000 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2001 usb_rx_callback_intf1, ictx,
2002 ictx->rx_endpoint_intf1->bInterval);
2003
2004 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2005
2006 if (ret) {
2007 err("%s: usb_submit_urb failed for intf1 (%d)",
2008 __func__, ret);
2009 goto urb_submit_failed;
2010 }
2011
2012 return ictx;
2013
2014urb_submit_failed:
2015 if (ictx->touch) {
2016 input_unregister_device(ictx->touch);
2017 input_free_device(ictx->touch);
2018 }
2019touch_setup_failed:
2020find_endpoint_failed:
2021 mutex_unlock(&ictx->lock);
2022 usb_free_urb(rx_urb);
2023rx_urb_alloc_failed:
2024 dev_err(ictx->dev, "unable to initialize intf0, err %d\n", ret);
2025
2026 return NULL;
2027}
2028
2029/*
2030 * The 0x15c2:0xffdc device ID was used for umpteen different imon
2031 * devices, and all of them constantly spew interrupts, even when there
2032 * is no actual data to report. However, byte 6 of this buffer looks like
2033 * its unique across device variants, so we're trying to key off that to
2034 * figure out which display type (if any) and what IR protocol the device
6718e8ad
JW		 2035 * actually supports. These devices have their IR protocol hard-coded into
2036 * their firmware, they can't be changed on the fly like the newer hardware.
21677cfc
JW		 2037 */
2038static void imon_get_ffdc_type(struct imon_context *ictx)
2039{
2040 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
2041 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
6718e8ad 2042 u64 allowed_protos = IR_TYPE_OTHER;
21677cfc
JW		 2043
2044 switch (ffdc_cfg_byte) {
2045 /* iMON Knob, no display, iMON IR + vol knob */
2046 case 0x21:
2047 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
2048 ictx->display_supported = false;
2049 break;
2050 /* iMON VFD, no IR (does have vol knob tho) */
2051 case 0x35:
2052 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
2053 detected_display_type = IMON_DISPLAY_TYPE_VFD;
21677cfc
JW		 2054 break;
2055 /* iMON VFD, iMON IR */
2056 case 0x24:
2057 case 0x85:
2058 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
2059 detected_display_type = IMON_DISPLAY_TYPE_VFD;
2060 break;
2061 /* iMON LCD, MCE IR */
2062 case 0x9f:
2063 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
2064 detected_display_type = IMON_DISPLAY_TYPE_LCD;
6718e8ad 2065 allowed_protos = IR_TYPE_RC6;
21677cfc
JW		 2066 break;
2067 default:
2068 dev_info(ictx->dev, "Unknown 0xffdc device, "
2069 "defaulting to VFD and iMON IR");
2070 detected_display_type = IMON_DISPLAY_TYPE_VFD;
2071 break;
2072 }
2073
6718e8ad 2074 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
21677cfc
JW		 2075
2076 ictx->display_type = detected_display_type;
6718e8ad
JW		 2077 ictx->props->allowed_protos = allowed_protos;
2078 ictx->ir_type = allowed_protos;
21677cfc
JW		 2079}
2080
2081static void imon_set_display_type(struct imon_context *ictx,
2082 struct usb_interface *intf)
2083{
2084 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
2085
2086 /*
2087 * Try to auto-detect the type of display if the user hasn't set
2088 * it by hand via the display_type modparam. Default is VFD.
2089 */
2090
2091 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
2092 switch (ictx->product) {
2093 case 0xffdc:
2094 /* set in imon_get_ffdc_type() */
2095 configured_display_type = ictx->display_type;
2096 break;
2097 case 0x0034:
2098 case 0x0035:
2099 configured_display_type = IMON_DISPLAY_TYPE_VGA;
2100 break;
2101 case 0x0038:
2102 case 0x0039:
2103 case 0x0045:
2104 configured_display_type = IMON_DISPLAY_TYPE_LCD;
2105 break;
2106 case 0x003c:
2107 case 0x0041:
2108 case 0x0042:
2109 case 0x0043:
2110 configured_display_type = IMON_DISPLAY_TYPE_NONE;
2111 ictx->display_supported = false;
2112 break;
2113 case 0x0036:
2114 case 0x0044:
2115 default:
2116 configured_display_type = IMON_DISPLAY_TYPE_VFD;
2117 break;
2118 }
2119 } else {
2120 configured_display_type = display_type;
2121 if (display_type == IMON_DISPLAY_TYPE_NONE)
2122 ictx->display_supported = false;
2123 else
2124 ictx->display_supported = true;
2125 dev_info(ictx->dev, "%s: overriding display type to %d via "
2126 "modparam\n", __func__, display_type);
2127 }
2128
2129 ictx->display_type = configured_display_type;
2130}
2131
2132static void imon_init_display(struct imon_context *ictx,
2133 struct usb_interface *intf)
2134{
2135 int ret;
2136
2137 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2138
2139 /* set up sysfs entry for built-in clock */
2140 ret = sysfs_create_group(&intf->dev.kobj,
2141 &imon_display_attribute_group);
2142 if (ret)
2143 dev_err(ictx->dev, "Could not create display sysfs "
2144 "entries(%d)", ret);
2145
2146 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2147 ret = usb_register_dev(intf, &imon_lcd_class);
2148 else
2149 ret = usb_register_dev(intf, &imon_vfd_class);
2150 if (ret)
2151 /* Not a fatal error, so ignore */
2152 dev_info(ictx->dev, "could not get a minor number for "
2153 "display\n");
2154
2155}
2156
2157/**
2158 * Callback function for USB core API: Probe
2159 */
2160static int __devinit imon_probe(struct usb_interface *interface,
2161 const struct usb_device_id *id)
2162{
2163 struct usb_device *usbdev = NULL;
2164 struct usb_host_interface *iface_desc = NULL;
2165 struct usb_interface *first_if;
2166 struct device *dev = &interface->dev;
2167 int ifnum, code_length, sysfs_err;
2168 int ret = 0;
2169 struct imon_context *ictx = NULL;
2170 struct imon_context *first_if_ctx = NULL;
2171 u16 vendor, product;
2172 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
2173 0x00, 0x00, 0x00, 0x88 };
2174
2175 code_length = BUF_CHUNK_SIZE * 8;
2176
2177 usbdev = usb_get_dev(interface_to_usbdev(interface));
2178 iface_desc = interface->cur_altsetting;
2179 ifnum = iface_desc->desc.bInterfaceNumber;
2180 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2181 product = le16_to_cpu(usbdev->descriptor.idProduct);
2182
2183 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2184 __func__, vendor, product, ifnum);
2185
2186 /* prevent races probing devices w/multiple interfaces */
2187 mutex_lock(&driver_lock);
2188
2189 first_if = usb_ifnum_to_if(usbdev, 0);
2190 first_if_ctx = (struct imon_context *)usb_get_intfdata(first_if);
2191
2192 if (ifnum == 0) {
2193 ictx = imon_init_intf0(interface);
2194 if (!ictx) {
2195 err("%s: failed to initialize context!\n", __func__);
2196 ret = -ENODEV;
2197 goto fail;
2198 }
2199
2200 if (product == 0xffdc) {
2201 /* RF products *also* use 0xffdc... sigh... */
2202 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2203 &imon_rf_attribute_group);
2204 if (sysfs_err)
2205 err("%s: Could not create RF sysfs entries(%d)",
2206 __func__, sysfs_err);
2207 }
2208
2209 } else {
2210 /* this is the secondary interface on the device */
2211 ictx = imon_init_intf1(interface, first_if_ctx);
2212 if (!ictx) {
2213 err("%s: failed to attach to context!\n", __func__);
2214 ret = -ENODEV;
2215 goto fail;
2216 }
2217
2218 }
2219
2220 usb_set_intfdata(interface, ictx);
2221
2222 if (ifnum == 0) {
2223 /* Enable front-panel buttons and/or knobs */
2224 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
2225 ret = send_packet(ictx);
2226 /* Not fatal, but warn about it */
2227 if (ret)
2228 dev_info(dev, "failed to enable panel buttons "
2229 "and/or knobs\n");
2230
2231 if (product == 0xffdc)
2232 imon_get_ffdc_type(ictx);
21677cfc
JW		 2233
2234 imon_set_display_type(ictx, interface);
2235
2236 if (ictx->display_supported)
2237 imon_init_display(ictx, interface);
2238 }
2239
2240 /* set IR protocol/remote type */
6718e8ad
JW		 2241 ret = imon_ir_change_protocol(ictx, ictx->ir_type);
2242 if (ret) {
2243 dev_warn(dev, "%s: failed to set IR protocol, falling back "
2244 "to standard iMON protocol mode\n", __func__);
2245 ictx->ir_type = IR_TYPE_OTHER;
2246 }
21677cfc
JW		 2247
2248 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2249 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2250 usbdev->bus->busnum, usbdev->devnum);
2251
2252 mutex_unlock(&ictx->lock);
2253 mutex_unlock(&driver_lock);
2254
2255 return 0;
2256
2257fail:
2258 mutex_unlock(&driver_lock);
2259 dev_err(dev, "unable to register, err %d\n", ret);
2260
2261 return ret;
2262}
2263
2264/**
2265 * Callback function for USB core API: disconnect
2266 */
2267static void __devexit imon_disconnect(struct usb_interface *interface)
2268{
2269 struct imon_context *ictx;
2270 struct device *dev;
2271 int ifnum;
2272
2273 /* prevent races with multi-interface device probing and display_open */
2274 mutex_lock(&driver_lock);
2275
2276 ictx = usb_get_intfdata(interface);
2277 dev = ictx->dev;
2278 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2279
2280 mutex_lock(&ictx->lock);
2281
2282 /*
2283 * sysfs_remove_group is safe to call even if sysfs_create_group
2284 * hasn't been called
2285 */
2286 sysfs_remove_group(&interface->dev.kobj,
2287 &imon_display_attribute_group);
2288 sysfs_remove_group(&interface->dev.kobj,
2289 &imon_rf_attribute_group);
2290
2291 usb_set_intfdata(interface, NULL);
2292
2293 /* Abort ongoing write */
2294 if (ictx->tx.busy) {
2295 usb_kill_urb(ictx->tx_urb);
2296 complete_all(&ictx->tx.finished);
2297 }
2298
2299 if (ifnum == 0) {
2300 ictx->dev_present_intf0 = 0;
2301 usb_kill_urb(ictx->rx_urb_intf0);
2302 input_unregister_device(ictx->idev);
2303 if (ictx->display_supported) {
2304 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2305 usb_deregister_dev(interface, &imon_lcd_class);
2306 else
2307 usb_deregister_dev(interface, &imon_vfd_class);
2308 }
2309 } else {
2310 ictx->dev_present_intf1 = 0;
2311 usb_kill_urb(ictx->rx_urb_intf1);
2312 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2313 input_unregister_device(ictx->touch);
2314 }
2315
2316 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) {
2317 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
2318 del_timer_sync(&ictx->ttimer);
2319 mutex_unlock(&ictx->lock);
2320 if (!ictx->display_isopen)
2321 free_imon_context(ictx);
2322 } else {
6718e8ad 2323 if (ictx->ir_type == IR_TYPE_RC6)
21677cfc
JW		 2324 del_timer_sync(&ictx->itimer);
2325 mutex_unlock(&ictx->lock);
2326 }
2327
2328 mutex_unlock(&driver_lock);
2329
2330 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2331 __func__, ifnum);
2332}
2333
2334static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2335{
2336 struct imon_context *ictx = usb_get_intfdata(intf);
2337 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2338
2339 if (ifnum == 0)
2340 usb_kill_urb(ictx->rx_urb_intf0);
2341 else
2342 usb_kill_urb(ictx->rx_urb_intf1);
2343
2344 return 0;
2345}
2346
2347static int imon_resume(struct usb_interface *intf)
2348{
2349 int rc = 0;
2350 struct imon_context *ictx = usb_get_intfdata(intf);
2351 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2352
2353 if (ifnum == 0) {
2354 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2355 usb_rcvintpipe(ictx->usbdev_intf0,
2356 ictx->rx_endpoint_intf0->bEndpointAddress),
2357 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2358 usb_rx_callback_intf0, ictx,
2359 ictx->rx_endpoint_intf0->bInterval);
2360
2361 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2362
2363 } else {
2364 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2365 usb_rcvintpipe(ictx->usbdev_intf1,
2366 ictx->rx_endpoint_intf1->bEndpointAddress),
2367 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2368 usb_rx_callback_intf1, ictx,
2369 ictx->rx_endpoint_intf1->bInterval);
2370
2371 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2372 }
2373
2374 return rc;
2375}
2376
2377static int __init imon_init(void)
2378{
2379 int rc;
2380
2381 rc = usb_register(&imon_driver);
2382 if (rc) {
2383 err("%s: usb register failed(%d)", __func__, rc);
2384 rc = -ENODEV;
2385 }
2386
2387 return rc;
2388}
2389
2390static void __exit imon_exit(void)
2391{
2392 usb_deregister(&imon_driver);
2393}
2394
2395module_init(imon_init);
2396module_exit(imon_exit);
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