1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
4 *
5 * Copyright(C) 2010 Jarod Wilson <jarod@wilsonet.com>
6 * Portions based on the original lirc_imon driver,
7 * Copyright(C) 2004 Venky Raju(dev@venky.ws)
8 *
9 * Huge thanks to R. Geoff Newbury for invaluable debugging on the
10 * 0xffdc iMON devices, and for sending me one to hack on, without
11 * which the support for them wouldn't be nearly as good. Thanks
12 * also to the numerous 0xffdc device owners that tested auto-config
13 * support for me and provided debug dumps from their devices.
14 */
15
16#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18#include <linux/errno.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/ktime.h>
22#include <linux/module.h>
23#include <linux/slab.h>
24#include <linux/uaccess.h>
25#include <linux/ratelimit.h>
26
27#include <linux/input.h>
28#include <linux/usb.h>
29#include <linux/usb/input.h>
30#include <media/rc-core.h>
31
32#include <linux/timer.h>
33
34#define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
35#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
36#define MOD_NAME "imon"
37#define MOD_VERSION "0.9.4"
38
39#define DISPLAY_MINOR_BASE 144
40#define DEVICE_NAME "lcd%d"
41
42#define BUF_CHUNK_SIZE 8
43#define BUF_SIZE 128
44
45#define BIT_DURATION 250 /* each bit received is 250us */
46
47#define IMON_CLOCK_ENABLE_PACKETS 2
48
49/*** P R O T O T Y P E S ***/
50
51/* USB Callback prototypes */
52static int imon_probe(struct usb_interface *interface,
53 const struct usb_device_id *id);
54static void imon_disconnect(struct usb_interface *interface);
55static void usb_rx_callback_intf0(struct urb *urb);
56static void usb_rx_callback_intf1(struct urb *urb);
57static void usb_tx_callback(struct urb *urb);
58
59/* suspend/resume support */
60static int imon_resume(struct usb_interface *intf);
61static int imon_suspend(struct usb_interface *intf, pm_message_t message);
62
63/* Display file_operations function prototypes */
64static int display_open(struct inode *inode, struct file *file);
65static int display_close(struct inode *inode, struct file *file);
66
67/* VFD write operation */
68static ssize_t vfd_write(struct file *file, const char __user *buf,
69 size_t n_bytes, loff_t *pos);
70
71/* LCD file_operations override function prototypes */
72static ssize_t lcd_write(struct file *file, const char __user *buf,
73 size_t n_bytes, loff_t *pos);
74
75/*** G L O B A L S ***/
76
77struct imon_panel_key_table {
78 u64 hw_code;
79 u32 keycode;
80};
81
82struct imon_usb_dev_descr {
83 __u16 flags;
84#define IMON_NO_FLAGS 0
85#define IMON_NEED_20MS_PKT_DELAY 1
86#define IMON_SUPPRESS_REPEATED_KEYS 2
87 struct imon_panel_key_table key_table[];
88};
89
90struct imon_context {
91 struct device *dev;
92 /* Newer devices have two interfaces */
93 struct usb_device *usbdev_intf0;
94 struct usb_device *usbdev_intf1;
95
96 bool display_supported; /* not all controllers do */
97 bool display_isopen; /* display port has been opened */
98 bool rf_device; /* true if iMON 2.4G LT/DT RF device */
99 bool rf_isassociating; /* RF remote associating */
100 bool dev_present_intf0; /* USB device presence, interface 0 */
101 bool dev_present_intf1; /* USB device presence, interface 1 */
102
103 struct mutex lock; /* to lock this object */
104 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
105
106 struct usb_endpoint_descriptor *rx_endpoint_intf0;
107 struct usb_endpoint_descriptor *rx_endpoint_intf1;
108 struct usb_endpoint_descriptor *tx_endpoint;
109 struct urb *rx_urb_intf0;
110 struct urb *rx_urb_intf1;
111 struct urb *tx_urb;
112 bool tx_control;
113 unsigned char usb_rx_buf[8];
114 unsigned char usb_tx_buf[8];
115 unsigned int send_packet_delay;
116
117 struct tx_t {
118 unsigned char data_buf[35]; /* user data buffer */
119 struct completion finished; /* wait for write to finish */
120 bool busy; /* write in progress */
121 int status; /* status of tx completion */
122 } tx;
123
124 u16 vendor; /* usb vendor ID */
125 u16 product; /* usb product ID */
126
127 struct rc_dev *rdev; /* rc-core device for remote */
128 struct input_dev *idev; /* input device for panel & IR mouse */
129 struct input_dev *touch; /* input device for touchscreen */
130
131 spinlock_t kc_lock; /* make sure we get keycodes right */
132 u32 kc; /* current input keycode */
133 u32 last_keycode; /* last reported input keycode */
134 u32 rc_scancode; /* the computed remote scancode */
135 u8 rc_toggle; /* the computed remote toggle bit */
136 u64 rc_proto; /* iMON or MCE (RC6) IR protocol? */
137 bool release_code; /* some keys send a release code */
138
139 u8 display_type; /* store the display type */
140 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
141
142 char name_rdev[128]; /* rc input device name */
143 char phys_rdev[64]; /* rc input device phys path */
144
145 char name_idev[128]; /* input device name */
146 char phys_idev[64]; /* input device phys path */
147
148 char name_touch[128]; /* touch screen name */
149 char phys_touch[64]; /* touch screen phys path */
150 struct timer_list ttimer; /* touch screen timer */
151 int touch_x; /* x coordinate on touchscreen */
152 int touch_y; /* y coordinate on touchscreen */
153 const struct imon_usb_dev_descr *dev_descr;
154 /* device description with key */
155 /* table for front panels */
156 /*
157 * Fields for deferring free_imon_context().
158 *
159 * Since reference to "struct imon_context" is stored into
160 * "struct file"->private_data, we need to remember
161 * how many file descriptors might access this "struct imon_context".
162 */
163 refcount_t users;
164 /*
165 * Use a flag for telling display_open()/vfd_write()/lcd_write() that
166 * imon_disconnect() was already called.
167 */
168 bool disconnected;
169 /*
170 * We need to wait for RCU grace period in order to allow
171 * display_open() to safely check ->disconnected and increment ->users.
172 */
173 struct rcu_head rcu;
174};
175
176#define TOUCH_TIMEOUT (HZ/30)
177
178/* vfd character device file operations */
179static const struct file_operations vfd_fops = {
180 .owner = THIS_MODULE,
181 .open = display_open,
182 .write = vfd_write,
183 .release = display_close,
184 .llseek = noop_llseek,
185};
186
187/* lcd character device file operations */
188static const struct file_operations lcd_fops = {
189 .owner = THIS_MODULE,
190 .open = display_open,
191 .write = lcd_write,
192 .release = display_close,
193 .llseek = noop_llseek,
194};
195
196enum {
197 IMON_DISPLAY_TYPE_AUTO = 0,
198 IMON_DISPLAY_TYPE_VFD = 1,
199 IMON_DISPLAY_TYPE_LCD = 2,
200 IMON_DISPLAY_TYPE_VGA = 3,
201 IMON_DISPLAY_TYPE_NONE = 4,
202};
203
204enum {
205 IMON_KEY_IMON = 0,
206 IMON_KEY_MCE = 1,
207 IMON_KEY_PANEL = 2,
208};
209
210static struct usb_class_driver imon_vfd_class = {
211 .name = DEVICE_NAME,
212 .fops = &vfd_fops,
213 .minor_base = DISPLAY_MINOR_BASE,
214};
215
216static struct usb_class_driver imon_lcd_class = {
217 .name = DEVICE_NAME,
218 .fops = &lcd_fops,
219 .minor_base = DISPLAY_MINOR_BASE,
220};
221
222/* imon receiver front panel/knob key table */
223static const struct imon_usb_dev_descr imon_default_table = {
224 .flags = IMON_NO_FLAGS,
225 .key_table = {
226 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
227 { 0x000000001200ffeell, KEY_UP },
228 { 0x000000001300ffeell, KEY_DOWN },
229 { 0x000000001400ffeell, KEY_LEFT },
230 { 0x000000001500ffeell, KEY_RIGHT },
231 { 0x000000001600ffeell, KEY_ENTER },
232 { 0x000000001700ffeell, KEY_ESC },
233 { 0x000000001f00ffeell, KEY_AUDIO },
234 { 0x000000002000ffeell, KEY_VIDEO },
235 { 0x000000002100ffeell, KEY_CAMERA },
236 { 0x000000002700ffeell, KEY_DVD },
237 { 0x000000002300ffeell, KEY_TV },
238 { 0x000000002b00ffeell, KEY_EXIT },
239 { 0x000000002c00ffeell, KEY_SELECT },
240 { 0x000000002d00ffeell, KEY_MENU },
241 { 0x000000000500ffeell, KEY_PREVIOUS },
242 { 0x000000000700ffeell, KEY_REWIND },
243 { 0x000000000400ffeell, KEY_STOP },
244 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
245 { 0x000000000800ffeell, KEY_FASTFORWARD },
246 { 0x000000000600ffeell, KEY_NEXT },
247 { 0x000000010000ffeell, KEY_RIGHT },
248 { 0x000001000000ffeell, KEY_LEFT },
249 { 0x000000003d00ffeell, KEY_SELECT },
250 { 0x000100000000ffeell, KEY_VOLUMEUP },
251 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
252 { 0x000000000100ffeell, KEY_MUTE },
253 /* 0xffdc iMON MCE VFD */
254 { 0x00010000ffffffeell, KEY_VOLUMEUP },
255 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
256 { 0x00000001ffffffeell, KEY_MUTE },
257 { 0x0000000fffffffeell, KEY_MEDIA },
258 { 0x00000012ffffffeell, KEY_UP },
259 { 0x00000013ffffffeell, KEY_DOWN },
260 { 0x00000014ffffffeell, KEY_LEFT },
261 { 0x00000015ffffffeell, KEY_RIGHT },
262 { 0x00000016ffffffeell, KEY_ENTER },
263 { 0x00000017ffffffeell, KEY_ESC },
264 /* iMON Knob values */
265 { 0x000100ffffffffeell, KEY_VOLUMEUP },
266 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
267 { 0x000008ffffffffeell, KEY_MUTE },
268 { 0, KEY_RESERVED },
269 }
270};
271
272static const struct imon_usb_dev_descr imon_OEM_VFD = {
273 .flags = IMON_NEED_20MS_PKT_DELAY,
274 .key_table = {
275 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
276 { 0x000000001200ffeell, KEY_UP },
277 { 0x000000001300ffeell, KEY_DOWN },
278 { 0x000000001400ffeell, KEY_LEFT },
279 { 0x000000001500ffeell, KEY_RIGHT },
280 { 0x000000001600ffeell, KEY_ENTER },
281 { 0x000000001700ffeell, KEY_ESC },
282 { 0x000000001f00ffeell, KEY_AUDIO },
283 { 0x000000002b00ffeell, KEY_EXIT },
284 { 0x000000002c00ffeell, KEY_SELECT },
285 { 0x000000002d00ffeell, KEY_MENU },
286 { 0x000000000500ffeell, KEY_PREVIOUS },
287 { 0x000000000700ffeell, KEY_REWIND },
288 { 0x000000000400ffeell, KEY_STOP },
289 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
290 { 0x000000000800ffeell, KEY_FASTFORWARD },
291 { 0x000000000600ffeell, KEY_NEXT },
292 { 0x000000010000ffeell, KEY_RIGHT },
293 { 0x000001000000ffeell, KEY_LEFT },
294 { 0x000000003d00ffeell, KEY_SELECT },
295 { 0x000100000000ffeell, KEY_VOLUMEUP },
296 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
297 { 0x000000000100ffeell, KEY_MUTE },
298 /* 0xffdc iMON MCE VFD */
299 { 0x00010000ffffffeell, KEY_VOLUMEUP },
300 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
301 { 0x00000001ffffffeell, KEY_MUTE },
302 { 0x0000000fffffffeell, KEY_MEDIA },
303 { 0x00000012ffffffeell, KEY_UP },
304 { 0x00000013ffffffeell, KEY_DOWN },
305 { 0x00000014ffffffeell, KEY_LEFT },
306 { 0x00000015ffffffeell, KEY_RIGHT },
307 { 0x00000016ffffffeell, KEY_ENTER },
308 { 0x00000017ffffffeell, KEY_ESC },
309 /* iMON Knob values */
310 { 0x000100ffffffffeell, KEY_VOLUMEUP },
311 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
312 { 0x000008ffffffffeell, KEY_MUTE },
313 { 0, KEY_RESERVED },
314 }
315};
316
317/* imon receiver front panel/knob key table for DH102*/
318static const struct imon_usb_dev_descr imon_DH102 = {
319 .flags = IMON_NO_FLAGS,
320 .key_table = {
321 { 0x000100000000ffeell, KEY_VOLUMEUP },
322 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
323 { 0x000000010000ffeell, KEY_MUTE },
324 { 0x0000000f0000ffeell, KEY_MEDIA },
325 { 0x000000120000ffeell, KEY_UP },
326 { 0x000000130000ffeell, KEY_DOWN },
327 { 0x000000140000ffeell, KEY_LEFT },
328 { 0x000000150000ffeell, KEY_RIGHT },
329 { 0x000000160000ffeell, KEY_ENTER },
330 { 0x000000170000ffeell, KEY_ESC },
331 { 0x0000002b0000ffeell, KEY_EXIT },
332 { 0x0000002c0000ffeell, KEY_SELECT },
333 { 0x0000002d0000ffeell, KEY_MENU },
334 { 0, KEY_RESERVED }
335 }
336};
337
338/* imon ultrabay front panel key table */
339static const struct imon_usb_dev_descr ultrabay_table = {
340 .flags = IMON_SUPPRESS_REPEATED_KEYS,
341 .key_table = {
342 { 0x0000000f0000ffeell, KEY_MEDIA }, /* Go */
343 { 0x000000000100ffeell, KEY_UP },
344 { 0x000000000001ffeell, KEY_DOWN },
345 { 0x000000160000ffeell, KEY_ENTER },
346 { 0x0000001f0000ffeell, KEY_AUDIO }, /* Music */
347 { 0x000000200000ffeell, KEY_VIDEO }, /* Movie */
348 { 0x000000210000ffeell, KEY_CAMERA }, /* Photo */
349 { 0x000000270000ffeell, KEY_DVD }, /* DVD */
350 { 0x000000230000ffeell, KEY_TV }, /* TV */
351 { 0x000000050000ffeell, KEY_PREVIOUS }, /* Previous */
352 { 0x000000070000ffeell, KEY_REWIND },
353 { 0x000000040000ffeell, KEY_STOP },
354 { 0x000000020000ffeell, KEY_PLAYPAUSE },
355 { 0x000000080000ffeell, KEY_FASTFORWARD },
356 { 0x000000060000ffeell, KEY_NEXT }, /* Next */
357 { 0x000100000000ffeell, KEY_VOLUMEUP },
358 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
359 { 0x000000010000ffeell, KEY_MUTE },
360 { 0, KEY_RESERVED },
361 }
362};
363
364/*
365 * USB Device ID for iMON USB Control Boards
366 *
367 * The Windows drivers contain 6 different inf files, more or less one for
368 * each new device until the 0x0034-0x0046 devices, which all use the same
369 * driver. Some of the devices in the 34-46 range haven't been definitively
370 * identified yet. Early devices have either a TriGem Computer, Inc. or a
371 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
372 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
373 * the ffdc and later devices, which do onboard decoding.
374 */
375static const struct usb_device_id imon_usb_id_table[] = {
376 /*
377 * Several devices with this same device ID, all use iMON_PAD.inf
378 * SoundGraph iMON PAD (IR & VFD)
379 * SoundGraph iMON PAD (IR & LCD)
380 * SoundGraph iMON Knob (IR only)
381 */
382 { USB_DEVICE(0x15c2, 0xffdc),
383 .driver_info = (unsigned long)&imon_default_table },
384
385 /*
386 * Newer devices, all driven by the latest iMON Windows driver, full
387 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
388 * Need user input to fill in details on unknown devices.
389 */
390 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
391 { USB_DEVICE(0x15c2, 0x0034),
392 .driver_info = (unsigned long)&imon_DH102 },
393 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
394 { USB_DEVICE(0x15c2, 0x0035),
395 .driver_info = (unsigned long)&imon_default_table},
396 /* SoundGraph iMON OEM VFD (IR & VFD) */
397 { USB_DEVICE(0x15c2, 0x0036),
398 .driver_info = (unsigned long)&imon_OEM_VFD },
399 /* device specifics unknown */
400 { USB_DEVICE(0x15c2, 0x0037),
401 .driver_info = (unsigned long)&imon_default_table},
402 /* SoundGraph iMON OEM LCD (IR & LCD) */
403 { USB_DEVICE(0x15c2, 0x0038),
404 .driver_info = (unsigned long)&imon_default_table},
405 /* SoundGraph iMON UltraBay (IR & LCD) */
406 { USB_DEVICE(0x15c2, 0x0039),
407 .driver_info = (unsigned long)&imon_default_table},
408 /* device specifics unknown */
409 { USB_DEVICE(0x15c2, 0x003a),
410 .driver_info = (unsigned long)&imon_default_table},
411 /* device specifics unknown */
412 { USB_DEVICE(0x15c2, 0x003b),
413 .driver_info = (unsigned long)&imon_default_table},
414 /* SoundGraph iMON OEM Inside (IR only) */
415 { USB_DEVICE(0x15c2, 0x003c),
416 .driver_info = (unsigned long)&imon_default_table},
417 /* device specifics unknown */
418 { USB_DEVICE(0x15c2, 0x003d),
419 .driver_info = (unsigned long)&imon_default_table},
420 /* device specifics unknown */
421 { USB_DEVICE(0x15c2, 0x003e),
422 .driver_info = (unsigned long)&imon_default_table},
423 /* device specifics unknown */
424 { USB_DEVICE(0x15c2, 0x003f),
425 .driver_info = (unsigned long)&imon_default_table},
426 /* device specifics unknown */
427 { USB_DEVICE(0x15c2, 0x0040),
428 .driver_info = (unsigned long)&imon_default_table},
429 /* SoundGraph iMON MINI (IR only) */
430 { USB_DEVICE(0x15c2, 0x0041),
431 .driver_info = (unsigned long)&imon_default_table},
432 /* Antec Veris Multimedia Station EZ External (IR only) */
433 { USB_DEVICE(0x15c2, 0x0042),
434 .driver_info = (unsigned long)&imon_default_table},
435 /* Antec Veris Multimedia Station Basic Internal (IR only) */
436 { USB_DEVICE(0x15c2, 0x0043),
437 .driver_info = (unsigned long)&imon_default_table},
438 /* Antec Veris Multimedia Station Elite (IR & VFD) */
439 { USB_DEVICE(0x15c2, 0x0044),
440 .driver_info = (unsigned long)&imon_default_table},
441 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
442 { USB_DEVICE(0x15c2, 0x0045),
443 .driver_info = (unsigned long)&imon_default_table},
444 /* device specifics unknown */
445 { USB_DEVICE(0x15c2, 0x0046),
446 .driver_info = (unsigned long)&imon_default_table},
447 {}
448};
449
450/* USB Device data */
451static struct usb_driver imon_driver = {
452 .name = MOD_NAME,
453 .probe = imon_probe,
454 .disconnect = imon_disconnect,
455 .suspend = imon_suspend,
456 .resume = imon_resume,
457 .id_table = imon_usb_id_table,
458};
459
460/* Module bookkeeping bits */
461MODULE_AUTHOR(MOD_AUTHOR);
462MODULE_DESCRIPTION(MOD_DESC);
463MODULE_VERSION(MOD_VERSION);
464MODULE_LICENSE("GPL");
465MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
466
467static bool debug;
468module_param(debug, bool, S_IRUGO | S_IWUSR);
469MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
470
471/* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
472static int display_type;
473module_param(display_type, int, S_IRUGO);
474MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
475
476static int pad_stabilize = 1;
477module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
478MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD presses in arrow key mode. 0=disable, 1=enable (default).");
479
480/*
481 * In certain use cases, mouse mode isn't really helpful, and could actually
482 * cause confusion, so allow disabling it when the IR device is open.
483 */
484static bool nomouse;
485module_param(nomouse, bool, S_IRUGO | S_IWUSR);
486MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is open. 0=don't disable, 1=disable. (default: don't disable)");
487
488/* threshold at which a pad push registers as an arrow key in kbd mode */
489static int pad_thresh;
490module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
491MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)");
492
493
494static void free_imon_context(struct imon_context *ictx)
495{
496 struct device *dev = ictx->dev;
497
498 usb_free_urb(urb: ictx->tx_urb);
499 WARN_ON(ictx->dev_present_intf0);
500 usb_free_urb(urb: ictx->rx_urb_intf0);
501 WARN_ON(ictx->dev_present_intf1);
502 usb_free_urb(urb: ictx->rx_urb_intf1);
503 kfree_rcu(ictx, rcu);
504
505 dev_dbg(dev, "%s: iMON context freed\n", __func__);
506}
507
508/*
509 * Called when the Display device (e.g. /dev/lcd0)
510 * is opened by the application.
511 */
512static int display_open(struct inode *inode, struct file *file)
513{
514 struct usb_interface *interface;
515 struct imon_context *ictx = NULL;
516 int subminor;
517 int retval = 0;
518
519 subminor = iminor(inode);
520 interface = usb_find_interface(drv: &imon_driver, minor: subminor);
521 if (!interface) {
522 pr_err("could not find interface for minor %d\n", subminor);
523 retval = -ENODEV;
524 goto exit;
525 }
526
527 rcu_read_lock();
528 ictx = usb_get_intfdata(intf: interface);
529 if (!ictx || ictx->disconnected || !refcount_inc_not_zero(r: &ictx->users)) {
530 rcu_read_unlock();
531 pr_err("no context found for minor %d\n", subminor);
532 retval = -ENODEV;
533 goto exit;
534 }
535 rcu_read_unlock();
536
537 mutex_lock(&ictx->lock);
538
539 if (!ictx->display_supported) {
540 pr_err("display not supported by device\n");
541 retval = -ENODEV;
542 } else if (ictx->display_isopen) {
543 pr_err("display port is already open\n");
544 retval = -EBUSY;
545 } else {
546 ictx->display_isopen = true;
547 file->private_data = ictx;
548 dev_dbg(ictx->dev, "display port opened\n");
549 }
550
551 mutex_unlock(lock: &ictx->lock);
552
553 if (retval && refcount_dec_and_test(r: &ictx->users))
554 free_imon_context(ictx);
555
556exit:
557 return retval;
558}
559
560/*
561 * Called when the display device (e.g. /dev/lcd0)
562 * is closed by the application.
563 */
564static int display_close(struct inode *inode, struct file *file)
565{
566 struct imon_context *ictx = file->private_data;
567 int retval = 0;
568
569 mutex_lock(&ictx->lock);
570
571 if (!ictx->display_supported) {
572 pr_err("display not supported by device\n");
573 retval = -ENODEV;
574 } else if (!ictx->display_isopen) {
575 pr_err("display is not open\n");
576 retval = -EIO;
577 } else {
578 ictx->display_isopen = false;
579 dev_dbg(ictx->dev, "display port closed\n");
580 }
581
582 mutex_unlock(lock: &ictx->lock);
583 if (refcount_dec_and_test(r: &ictx->users))
584 free_imon_context(ictx);
585 return retval;
586}
587
588/*
589 * Sends a packet to the device -- this function must be called with
590 * ictx->lock held, or its unlock/lock sequence while waiting for tx
591 * to complete can/will lead to a deadlock.
592 */
593static int send_packet(struct imon_context *ictx)
594{
595 unsigned int pipe;
596 unsigned long timeout;
597 int interval = 0;
598 int retval = 0;
599 struct usb_ctrlrequest *control_req = NULL;
600
601 /* Check if we need to use control or interrupt urb */
602 if (!ictx->tx_control) {
603 pipe = usb_sndintpipe(ictx->usbdev_intf0,
604 ictx->tx_endpoint->bEndpointAddress);
605 interval = ictx->tx_endpoint->bInterval;
606
607 usb_fill_int_urb(urb: ictx->tx_urb, dev: ictx->usbdev_intf0, pipe,
608 transfer_buffer: ictx->usb_tx_buf,
609 buffer_length: sizeof(ictx->usb_tx_buf),
610 complete_fn: usb_tx_callback, context: ictx, interval);
611
612 ictx->tx_urb->actual_length = 0;
613 } else {
614 /* fill request into kmalloc'ed space: */
615 control_req = kmalloc(size: sizeof(*control_req), GFP_KERNEL);
616 if (control_req == NULL)
617 return -ENOMEM;
618
619 /* setup packet is '21 09 0200 0001 0008' */
620 control_req->bRequestType = 0x21;
621 control_req->bRequest = 0x09;
622 control_req->wValue = cpu_to_le16(0x0200);
623 control_req->wIndex = cpu_to_le16(0x0001);
624 control_req->wLength = cpu_to_le16(0x0008);
625
626 /* control pipe is endpoint 0x00 */
627 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
628
629 /* build the control urb */
630 usb_fill_control_urb(urb: ictx->tx_urb, dev: ictx->usbdev_intf0,
631 pipe, setup_packet: (unsigned char *)control_req,
632 transfer_buffer: ictx->usb_tx_buf,
633 buffer_length: sizeof(ictx->usb_tx_buf),
634 complete_fn: usb_tx_callback, context: ictx);
635 ictx->tx_urb->actual_length = 0;
636 }
637
638 reinit_completion(x: &ictx->tx.finished);
639 ictx->tx.busy = true;
640 smp_rmb(); /* ensure later readers know we're busy */
641
642 retval = usb_submit_urb(urb: ictx->tx_urb, GFP_KERNEL);
643 if (retval) {
644 ictx->tx.busy = false;
645 smp_rmb(); /* ensure later readers know we're not busy */
646 pr_err_ratelimited("error submitting urb(%d)\n", retval);
647 } else {
648 /* Wait for transmission to complete (or abort) */
649 retval = wait_for_completion_interruptible(
650 x: &ictx->tx.finished);
651 if (retval) {
652 usb_kill_urb(urb: ictx->tx_urb);
653 pr_err_ratelimited("task interrupted\n");
654 }
655
656 ictx->tx.busy = false;
657 retval = ictx->tx.status;
658 if (retval)
659 pr_err_ratelimited("packet tx failed (%d)\n", retval);
660 }
661
662 kfree(objp: control_req);
663
664 /*
665 * Induce a mandatory delay before returning, as otherwise,
666 * send_packet can get called so rapidly as to overwhelm the device,
667 * particularly on faster systems and/or those with quirky usb.
668 */
669 timeout = msecs_to_jiffies(m: ictx->send_packet_delay);
670 set_current_state(TASK_INTERRUPTIBLE);
671 schedule_timeout(timeout);
672
673 return retval;
674}
675
676/*
677 * Sends an associate packet to the iMON 2.4G.
678 *
679 * This might not be such a good idea, since it has an id collision with
680 * some versions of the "IR & VFD" combo. The only way to determine if it
681 * is an RF version is to look at the product description string. (Which
682 * we currently do not fetch).
683 */
684static int send_associate_24g(struct imon_context *ictx)
685{
686 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
687 0x00, 0x00, 0x00, 0x20 };
688
689 if (!ictx) {
690 pr_err("no context for device\n");
691 return -ENODEV;
692 }
693
694 if (!ictx->dev_present_intf0) {
695 pr_err("no iMON device present\n");
696 return -ENODEV;
697 }
698
699 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
700
701 return send_packet(ictx);
702}
703
704/*
705 * Sends packets to setup and show clock on iMON display
706 *
707 * Arguments: year - last 2 digits of year, month - 1..12,
708 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
709 * hour - 0..23, minute - 0..59, second - 0..59
710 */
711static int send_set_imon_clock(struct imon_context *ictx,
712 unsigned int year, unsigned int month,
713 unsigned int day, unsigned int dow,
714 unsigned int hour, unsigned int minute,
715 unsigned int second)
716{
717 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
718 int retval = 0;
719 int i;
720
721 if (!ictx) {
722 pr_err("no context for device\n");
723 return -ENODEV;
724 }
725
726 switch (ictx->display_type) {
727 case IMON_DISPLAY_TYPE_LCD:
728 clock_enable_pkt[0][0] = 0x80;
729 clock_enable_pkt[0][1] = year;
730 clock_enable_pkt[0][2] = month-1;
731 clock_enable_pkt[0][3] = day;
732 clock_enable_pkt[0][4] = hour;
733 clock_enable_pkt[0][5] = minute;
734 clock_enable_pkt[0][6] = second;
735
736 clock_enable_pkt[1][0] = 0x80;
737 clock_enable_pkt[1][1] = 0;
738 clock_enable_pkt[1][2] = 0;
739 clock_enable_pkt[1][3] = 0;
740 clock_enable_pkt[1][4] = 0;
741 clock_enable_pkt[1][5] = 0;
742 clock_enable_pkt[1][6] = 0;
743
744 if (ictx->product == 0xffdc) {
745 clock_enable_pkt[0][7] = 0x50;
746 clock_enable_pkt[1][7] = 0x51;
747 } else {
748 clock_enable_pkt[0][7] = 0x88;
749 clock_enable_pkt[1][7] = 0x8a;
750 }
751
752 break;
753
754 case IMON_DISPLAY_TYPE_VFD:
755 clock_enable_pkt[0][0] = year;
756 clock_enable_pkt[0][1] = month-1;
757 clock_enable_pkt[0][2] = day;
758 clock_enable_pkt[0][3] = dow;
759 clock_enable_pkt[0][4] = hour;
760 clock_enable_pkt[0][5] = minute;
761 clock_enable_pkt[0][6] = second;
762 clock_enable_pkt[0][7] = 0x40;
763
764 clock_enable_pkt[1][0] = 0;
765 clock_enable_pkt[1][1] = 0;
766 clock_enable_pkt[1][2] = 1;
767 clock_enable_pkt[1][3] = 0;
768 clock_enable_pkt[1][4] = 0;
769 clock_enable_pkt[1][5] = 0;
770 clock_enable_pkt[1][6] = 0;
771 clock_enable_pkt[1][7] = 0x42;
772
773 break;
774
775 default:
776 return -ENODEV;
777 }
778
779 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
780 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
781 retval = send_packet(ictx);
782 if (retval) {
783 pr_err("send_packet failed for packet %d\n", i);
784 break;
785 }
786 }
787
788 return retval;
789}
790
791/*
792 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
793 */
794static ssize_t associate_remote_show(struct device *d,
795 struct device_attribute *attr,
796 char *buf)
797{
798 struct imon_context *ictx = dev_get_drvdata(dev: d);
799
800 if (!ictx)
801 return -ENODEV;
802
803 mutex_lock(&ictx->lock);
804 if (ictx->rf_isassociating)
805 strscpy(p: buf, q: "associating\n", PAGE_SIZE);
806 else
807 strscpy(p: buf, q: "closed\n", PAGE_SIZE);
808
809 dev_info(d, "Visit https://www.lirc.org/html/imon-24g.html for instructions on how to associate your iMON 2.4G DT/LT remote\n");
810 mutex_unlock(lock: &ictx->lock);
811 return strlen(buf);
812}
813
814static ssize_t associate_remote_store(struct device *d,
815 struct device_attribute *attr,
816 const char *buf, size_t count)
817{
818 struct imon_context *ictx;
819
820 ictx = dev_get_drvdata(dev: d);
821
822 if (!ictx)
823 return -ENODEV;
824
825 mutex_lock(&ictx->lock);
826 ictx->rf_isassociating = true;
827 send_associate_24g(ictx);
828 mutex_unlock(lock: &ictx->lock);
829
830 return count;
831}
832
833/*
834 * sysfs functions to control internal imon clock
835 */
836static ssize_t imon_clock_show(struct device *d,
837 struct device_attribute *attr, char *buf)
838{
839 struct imon_context *ictx = dev_get_drvdata(dev: d);
840 size_t len;
841
842 if (!ictx)
843 return -ENODEV;
844
845 mutex_lock(&ictx->lock);
846
847 if (!ictx->display_supported) {
848 len = snprintf(buf, PAGE_SIZE, fmt: "Not supported.");
849 } else {
850 len = snprintf(buf, PAGE_SIZE,
851 fmt: "To set the clock on your iMON display:\n"
852 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
853 "%s", ictx->display_isopen ?
854 "\nNOTE: imon device must be closed\n" : "");
855 }
856
857 mutex_unlock(lock: &ictx->lock);
858
859 return len;
860}
861
862static ssize_t imon_clock_store(struct device *d,
863 struct device_attribute *attr,
864 const char *buf, size_t count)
865{
866 struct imon_context *ictx = dev_get_drvdata(dev: d);
867 ssize_t retval;
868 unsigned int year, month, day, dow, hour, minute, second;
869
870 if (!ictx)
871 return -ENODEV;
872
873 mutex_lock(&ictx->lock);
874
875 if (!ictx->display_supported) {
876 retval = -ENODEV;
877 goto exit;
878 } else if (ictx->display_isopen) {
879 retval = -EBUSY;
880 goto exit;
881 }
882
883 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
884 &hour, &minute, &second) != 7) {
885 retval = -EINVAL;
886 goto exit;
887 }
888
889 if ((month < 1 || month > 12) ||
890 (day < 1 || day > 31) || (dow > 6) ||
891 (hour > 23) || (minute > 59) || (second > 59)) {
892 retval = -EINVAL;
893 goto exit;
894 }
895
896 retval = send_set_imon_clock(ictx, year, month, day, dow,
897 hour, minute, second);
898 if (retval)
899 goto exit;
900
901 retval = count;
902exit:
903 mutex_unlock(lock: &ictx->lock);
904
905 return retval;
906}
907
908
909static DEVICE_ATTR_RW(imon_clock);
910static DEVICE_ATTR_RW(associate_remote);
911
912static struct attribute *imon_display_sysfs_entries[] = {
913 &dev_attr_imon_clock.attr,
914 NULL
915};
916
917static const struct attribute_group imon_display_attr_group = {
918 .attrs = imon_display_sysfs_entries
919};
920
921static struct attribute *imon_rf_sysfs_entries[] = {
922 &dev_attr_associate_remote.attr,
923 NULL
924};
925
926static const struct attribute_group imon_rf_attr_group = {
927 .attrs = imon_rf_sysfs_entries
928};
929
930/*
931 * Writes data to the VFD. The iMON VFD is 2x16 characters
932 * and requires data in 5 consecutive USB interrupt packets,
933 * each packet but the last carrying 7 bytes.
934 *
935 * I don't know if the VFD board supports features such as
936 * scrolling, clearing rows, blanking, etc. so at
937 * the caller must provide a full screen of data. If fewer
938 * than 32 bytes are provided spaces will be appended to
939 * generate a full screen.
940 */
941static ssize_t vfd_write(struct file *file, const char __user *buf,
942 size_t n_bytes, loff_t *pos)
943{
944 int i;
945 int offset;
946 int seq;
947 int retval = 0;
948 struct imon_context *ictx = file->private_data;
949 static const unsigned char vfd_packet6[] = {
950 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
951
952 if (ictx->disconnected)
953 return -ENODEV;
954
955 if (mutex_lock_interruptible(&ictx->lock))
956 return -ERESTARTSYS;
957
958 if (!ictx->dev_present_intf0) {
959 pr_err_ratelimited("no iMON device present\n");
960 retval = -ENODEV;
961 goto exit;
962 }
963
964 if (n_bytes <= 0 || n_bytes > 32) {
965 pr_err_ratelimited("invalid payload size\n");
966 retval = -EINVAL;
967 goto exit;
968 }
969
970 if (copy_from_user(to: ictx->tx.data_buf, from: buf, n: n_bytes)) {
971 retval = -EFAULT;
972 goto exit;
973 }
974
975 /* Pad with spaces */
976 for (i = n_bytes; i < 32; ++i)
977 ictx->tx.data_buf[i] = ' ';
978
979 for (i = 32; i < 35; ++i)
980 ictx->tx.data_buf[i] = 0xFF;
981
982 offset = 0;
983 seq = 0;
984
985 do {
986 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
987 ictx->usb_tx_buf[7] = (unsigned char) seq;
988
989 retval = send_packet(ictx);
990 if (retval) {
991 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
992 goto exit;
993 } else {
994 seq += 2;
995 offset += 7;
996 }
997
998 } while (offset < 35);
999
1000 /* Send packet #6 */
1001 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
1002 ictx->usb_tx_buf[7] = (unsigned char) seq;
1003 retval = send_packet(ictx);
1004 if (retval)
1005 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
1006
1007exit:
1008 mutex_unlock(lock: &ictx->lock);
1009
1010 return (!retval) ? n_bytes : retval;
1011}
1012
1013/*
1014 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
1015 * packets. We accept data as 16 hexadecimal digits, followed by a
1016 * newline (to make it easy to drive the device from a command-line
1017 * -- even though the actual binary data is a bit complicated).
1018 *
1019 * The device itself is not a "traditional" text-mode display. It's
1020 * actually a 16x96 pixel bitmap display. That means if you want to
1021 * display text, you've got to have your own "font" and translate the
1022 * text into bitmaps for display. This is really flexible (you can
1023 * display whatever diacritics you need, and so on), but it's also
1024 * a lot more complicated than most LCDs...
1025 */
1026static ssize_t lcd_write(struct file *file, const char __user *buf,
1027 size_t n_bytes, loff_t *pos)
1028{
1029 int retval = 0;
1030 struct imon_context *ictx = file->private_data;
1031
1032 if (ictx->disconnected)
1033 return -ENODEV;
1034
1035 mutex_lock(&ictx->lock);
1036
1037 if (!ictx->display_supported) {
1038 pr_err_ratelimited("no iMON display present\n");
1039 retval = -ENODEV;
1040 goto exit;
1041 }
1042
1043 if (n_bytes != 8) {
1044 pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
1045 (int)n_bytes);
1046 retval = -EINVAL;
1047 goto exit;
1048 }
1049
1050 if (copy_from_user(to: ictx->usb_tx_buf, from: buf, n: 8)) {
1051 retval = -EFAULT;
1052 goto exit;
1053 }
1054
1055 retval = send_packet(ictx);
1056 if (retval) {
1057 pr_err_ratelimited("send packet failed!\n");
1058 goto exit;
1059 } else {
1060 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
1061 __func__, (int) n_bytes);
1062 }
1063exit:
1064 mutex_unlock(lock: &ictx->lock);
1065 return (!retval) ? n_bytes : retval;
1066}
1067
1068/*
1069 * Callback function for USB core API: transmit data
1070 */
1071static void usb_tx_callback(struct urb *urb)
1072{
1073 struct imon_context *ictx;
1074
1075 if (!urb)
1076 return;
1077 ictx = (struct imon_context *)urb->context;
1078 if (!ictx)
1079 return;
1080
1081 ictx->tx.status = urb->status;
1082
1083 /* notify waiters that write has finished */
1084 ictx->tx.busy = false;
1085 smp_rmb(); /* ensure later readers know we're not busy */
1086 complete(&ictx->tx.finished);
1087}
1088
1089/*
1090 * report touchscreen input
1091 */
1092static void imon_touch_display_timeout(struct timer_list *t)
1093{
1094 struct imon_context *ictx = from_timer(ictx, t, ttimer);
1095
1096 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
1097 return;
1098
1099 input_report_abs(dev: ictx->touch, ABS_X, value: ictx->touch_x);
1100 input_report_abs(dev: ictx->touch, ABS_Y, value: ictx->touch_y);
1101 input_report_key(dev: ictx->touch, BTN_TOUCH, value: 0x00);
1102 input_sync(dev: ictx->touch);
1103}
1104
1105/*
1106 * iMON IR receivers support two different signal sets -- those used by
1107 * the iMON remotes, and those used by the Windows MCE remotes (which is
1108 * really just RC-6), but only one or the other at a time, as the signals
1109 * are decoded onboard the receiver.
1110 *
1111 * This function gets called two different ways, one way is from
1112 * rc_register_device, for initial protocol selection/setup, and the other is
1113 * via a userspace-initiated protocol change request, either by direct sysfs
1114 * prodding or by something like ir-keytable. In the rc_register_device case,
1115 * the imon context lock is already held, but when initiated from userspace,
1116 * it is not, so we must acquire it prior to calling send_packet, which
1117 * requires that the lock is held.
1118 */
1119static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto)
1120{
1121 int retval;
1122 struct imon_context *ictx = rc->priv;
1123 struct device *dev = ictx->dev;
1124 bool unlock = false;
1125 unsigned char ir_proto_packet[] = {
1126 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1127
1128 if (*rc_proto && !(*rc_proto & rc->allowed_protocols))
1129 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n");
1130
1131 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) {
1132 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1133 ir_proto_packet[0] = 0x01;
1134 *rc_proto = RC_PROTO_BIT_RC6_MCE;
1135 } else if (*rc_proto & RC_PROTO_BIT_IMON) {
1136 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1137 if (!pad_stabilize)
1138 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1139 /* ir_proto_packet[0] = 0x00; // already the default */
1140 *rc_proto = RC_PROTO_BIT_IMON;
1141 } else {
1142 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n");
1143 if (!pad_stabilize)
1144 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1145 /* ir_proto_packet[0] = 0x00; // already the default */
1146 *rc_proto = RC_PROTO_BIT_IMON;
1147 }
1148
1149 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1150
1151 if (!mutex_is_locked(lock: &ictx->lock)) {
1152 unlock = true;
1153 mutex_lock(&ictx->lock);
1154 }
1155
1156 retval = send_packet(ictx);
1157 if (retval)
1158 goto out;
1159
1160 ictx->rc_proto = *rc_proto;
1161 ictx->pad_mouse = false;
1162
1163out:
1164 if (unlock)
1165 mutex_unlock(lock: &ictx->lock);
1166
1167 return retval;
1168}
1169
1170/*
1171 * The directional pad behaves a bit differently, depending on whether this is
1172 * one of the older ffdc devices or a newer device. Newer devices appear to
1173 * have a higher resolution matrix for more precise mouse movement, but it
1174 * makes things overly sensitive in keyboard mode, so we do some interesting
1175 * contortions to make it less touchy. Older devices run through the same
1176 * routine with shorter timeout and a smaller threshold.
1177 */
1178static int stabilize(int a, int b, u16 timeout, u16 threshold)
1179{
1180 ktime_t ct;
1181 static ktime_t prev_time;
1182 static ktime_t hit_time;
1183 static int x, y, prev_result, hits;
1184 int result = 0;
1185 long msec, msec_hit;
1186
1187 ct = ktime_get();
1188 msec = ktime_ms_delta(later: ct, earlier: prev_time);
1189 msec_hit = ktime_ms_delta(later: ct, earlier: hit_time);
1190
1191 if (msec > 100) {
1192 x = 0;
1193 y = 0;
1194 hits = 0;
1195 }
1196
1197 x += a;
1198 y += b;
1199
1200 prev_time = ct;
1201
1202 if (abs(x) > threshold || abs(y) > threshold) {
1203 if (abs(y) > abs(x))
1204 result = (y > 0) ? 0x7F : 0x80;
1205 else
1206 result = (x > 0) ? 0x7F00 : 0x8000;
1207
1208 x = 0;
1209 y = 0;
1210
1211 if (result == prev_result) {
1212 hits++;
1213
1214 if (hits > 3) {
1215 switch (result) {
1216 case 0x7F:
1217 y = 17 * threshold / 30;
1218 break;
1219 case 0x80:
1220 y -= 17 * threshold / 30;
1221 break;
1222 case 0x7F00:
1223 x = 17 * threshold / 30;
1224 break;
1225 case 0x8000:
1226 x -= 17 * threshold / 30;
1227 break;
1228 }
1229 }
1230
1231 if (hits == 2 && msec_hit < timeout) {
1232 result = 0;
1233 hits = 1;
1234 }
1235 } else {
1236 prev_result = result;
1237 hits = 1;
1238 hit_time = ct;
1239 }
1240 }
1241
1242 return result;
1243}
1244
1245static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1246{
1247 u32 keycode;
1248 u32 release;
1249 bool is_release_code = false;
1250
1251 /* Look for the initial press of a button */
1252 keycode = rc_g_keycode_from_table(dev: ictx->rdev, scancode);
1253 ictx->rc_toggle = 0x0;
1254 ictx->rc_scancode = scancode;
1255
1256 /* Look for the release of a button */
1257 if (keycode == KEY_RESERVED) {
1258 release = scancode & ~0x4000;
1259 keycode = rc_g_keycode_from_table(dev: ictx->rdev, scancode: release);
1260 if (keycode != KEY_RESERVED)
1261 is_release_code = true;
1262 }
1263
1264 ictx->release_code = is_release_code;
1265
1266 return keycode;
1267}
1268
1269static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1270{
1271 u32 keycode;
1272
1273#define MCE_KEY_MASK 0x7000
1274#define MCE_TOGGLE_BIT 0x8000
1275
1276 /*
1277 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1278 * (the toggle bit flipping between alternating key presses), while
1279 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1280 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1281 * but we can't or them into all codes, as some keys are decoded in
1282 * a different way w/o the same use of the toggle bit...
1283 */
1284 if (scancode & 0x80000000)
1285 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1286
1287 ictx->rc_scancode = scancode;
1288 keycode = rc_g_keycode_from_table(dev: ictx->rdev, scancode);
1289
1290 /* not used in mce mode, but make sure we know its false */
1291 ictx->release_code = false;
1292
1293 return keycode;
1294}
1295
1296static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code)
1297{
1298 const struct imon_panel_key_table *key_table;
1299 u32 keycode = KEY_RESERVED;
1300 int i;
1301
1302 key_table = ictx->dev_descr->key_table;
1303
1304 for (i = 0; key_table[i].hw_code != 0; i++) {
1305 if (key_table[i].hw_code == (code | 0xffee)) {
1306 keycode = key_table[i].keycode;
1307 break;
1308 }
1309 }
1310 ictx->release_code = false;
1311 return keycode;
1312}
1313
1314static bool imon_mouse_event(struct imon_context *ictx,
1315 unsigned char *buf, int len)
1316{
1317 signed char rel_x = 0x00, rel_y = 0x00;
1318 u8 right_shift = 1;
1319 bool mouse_input = true;
1320 int dir = 0;
1321 unsigned long flags;
1322
1323 spin_lock_irqsave(&ictx->kc_lock, flags);
1324
1325 /* newer iMON device PAD or mouse button */
1326 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1327 rel_x = buf[2];
1328 rel_y = buf[3];
1329 right_shift = 1;
1330 /* 0xffdc iMON PAD or mouse button input */
1331 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1332 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1333 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1334 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1335 if (buf[0] & 0x02)
1336 rel_x |= ~0x0f;
1337 rel_x = rel_x + rel_x / 2;
1338 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1339 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1340 if (buf[0] & 0x01)
1341 rel_y |= ~0x0f;
1342 rel_y = rel_y + rel_y / 2;
1343 right_shift = 2;
1344 /* some ffdc devices decode mouse buttons differently... */
1345 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1346 right_shift = 2;
1347 /* ch+/- buttons, which we use for an emulated scroll wheel */
1348 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1349 dir = 1;
1350 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1351 dir = -1;
1352 } else
1353 mouse_input = false;
1354
1355 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1356
1357 if (mouse_input) {
1358 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1359
1360 if (dir) {
1361 input_report_rel(dev: ictx->idev, REL_WHEEL, value: dir);
1362 } else if (rel_x || rel_y) {
1363 input_report_rel(dev: ictx->idev, REL_X, value: rel_x);
1364 input_report_rel(dev: ictx->idev, REL_Y, value: rel_y);
1365 } else {
1366 input_report_key(dev: ictx->idev, BTN_LEFT, value: buf[1] & 0x1);
1367 input_report_key(dev: ictx->idev, BTN_RIGHT,
1368 value: buf[1] >> right_shift & 0x1);
1369 }
1370 input_sync(dev: ictx->idev);
1371 spin_lock_irqsave(&ictx->kc_lock, flags);
1372 ictx->last_keycode = ictx->kc;
1373 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1374 }
1375
1376 return mouse_input;
1377}
1378
1379static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1380{
1381 mod_timer(timer: &ictx->ttimer, expires: jiffies + TOUCH_TIMEOUT);
1382 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1383 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1384 input_report_abs(dev: ictx->touch, ABS_X, value: ictx->touch_x);
1385 input_report_abs(dev: ictx->touch, ABS_Y, value: ictx->touch_y);
1386 input_report_key(dev: ictx->touch, BTN_TOUCH, value: 0x01);
1387 input_sync(dev: ictx->touch);
1388}
1389
1390static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1391{
1392 int dir = 0;
1393 signed char rel_x = 0x00, rel_y = 0x00;
1394 u16 timeout, threshold;
1395 u32 scancode = KEY_RESERVED;
1396 unsigned long flags;
1397
1398 /*
1399 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1400 * contain a position coordinate (x,y), with each component ranging
1401 * from -14 to 14. We want to down-sample this to only 4 discrete values
1402 * for up/down/left/right arrow keys. Also, when you get too close to
1403 * diagonals, it has a tendency to jump back and forth, so lets try to
1404 * ignore when they get too close.
1405 */
1406 if (ictx->product != 0xffdc) {
1407 /* first, pad to 8 bytes so it conforms with everything else */
1408 buf[5] = buf[6] = buf[7] = 0;
1409 timeout = 500; /* in msecs */
1410 /* (2*threshold) x (2*threshold) square */
1411 threshold = pad_thresh ? pad_thresh : 28;
1412 rel_x = buf[2];
1413 rel_y = buf[3];
1414
1415 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
1416 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1417 dir = stabilize(a: (int)rel_x, b: (int)rel_y,
1418 timeout, threshold);
1419 if (!dir) {
1420 spin_lock_irqsave(&ictx->kc_lock,
1421 flags);
1422 ictx->kc = KEY_UNKNOWN;
1423 spin_unlock_irqrestore(lock: &ictx->kc_lock,
1424 flags);
1425 return;
1426 }
1427 buf[2] = dir & 0xFF;
1428 buf[3] = (dir >> 8) & 0xFF;
1429 scancode = be32_to_cpu(*((__be32 *)buf));
1430 }
1431 } else {
1432 /*
1433 * Hack alert: instead of using keycodes, we have
1434 * to use hard-coded scancodes here...
1435 */
1436 if (abs(rel_y) > abs(rel_x)) {
1437 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1438 buf[3] = 0;
1439 if (rel_y > 0)
1440 scancode = 0x01007f00; /* KEY_DOWN */
1441 else
1442 scancode = 0x01008000; /* KEY_UP */
1443 } else {
1444 buf[2] = 0;
1445 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1446 if (rel_x > 0)
1447 scancode = 0x0100007f; /* KEY_RIGHT */
1448 else
1449 scancode = 0x01000080; /* KEY_LEFT */
1450 }
1451 }
1452
1453 /*
1454 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1455 * device (15c2:ffdc). The remote generates various codes from
1456 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1457 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1458 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1459 * reversed endianness. Extract direction from buffer, rotate endianness,
1460 * adjust sign and feed the values into stabilize(). The resulting codes
1461 * will be 0x01008000, 0x01007F00, which match the newer devices.
1462 */
1463 } else {
1464 timeout = 10; /* in msecs */
1465 /* (2*threshold) x (2*threshold) square */
1466 threshold = pad_thresh ? pad_thresh : 15;
1467
1468 /* buf[1] is x */
1469 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1470 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1471 if (buf[0] & 0x02)
1472 rel_x |= ~0x10+1;
1473 /* buf[2] is y */
1474 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1475 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1476 if (buf[0] & 0x01)
1477 rel_y |= ~0x10+1;
1478
1479 buf[0] = 0x01;
1480 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1481
1482 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
1483 dir = stabilize(a: (int)rel_x, b: (int)rel_y,
1484 timeout, threshold);
1485 if (!dir) {
1486 spin_lock_irqsave(&ictx->kc_lock, flags);
1487 ictx->kc = KEY_UNKNOWN;
1488 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1489 return;
1490 }
1491 buf[2] = dir & 0xFF;
1492 buf[3] = (dir >> 8) & 0xFF;
1493 scancode = be32_to_cpu(*((__be32 *)buf));
1494 } else {
1495 /*
1496 * Hack alert: instead of using keycodes, we have
1497 * to use hard-coded scancodes here...
1498 */
1499 if (abs(rel_y) > abs(rel_x)) {
1500 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1501 buf[3] = 0;
1502 if (rel_y > 0)
1503 scancode = 0x01007f00; /* KEY_DOWN */
1504 else
1505 scancode = 0x01008000; /* KEY_UP */
1506 } else {
1507 buf[2] = 0;
1508 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1509 if (rel_x > 0)
1510 scancode = 0x0100007f; /* KEY_RIGHT */
1511 else
1512 scancode = 0x01000080; /* KEY_LEFT */
1513 }
1514 }
1515 }
1516
1517 if (scancode) {
1518 spin_lock_irqsave(&ictx->kc_lock, flags);
1519 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1520 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1521 }
1522}
1523
1524/*
1525 * figure out if these is a press or a release. We don't actually
1526 * care about repeats, as those will be auto-generated within the IR
1527 * subsystem for repeating scancodes.
1528 */
1529static int imon_parse_press_type(struct imon_context *ictx,
1530 unsigned char *buf, u8 ktype)
1531{
1532 int press_type = 0;
1533 unsigned long flags;
1534
1535 spin_lock_irqsave(&ictx->kc_lock, flags);
1536
1537 /* key release of 0x02XXXXXX key */
1538 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1539 ictx->kc = ictx->last_keycode;
1540
1541 /* mouse button release on (some) 0xffdc devices */
1542 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1543 buf[2] == 0x81 && buf[3] == 0xb7)
1544 ictx->kc = ictx->last_keycode;
1545
1546 /* mouse button release on (some other) 0xffdc devices */
1547 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1548 buf[2] == 0x81 && buf[3] == 0xb7)
1549 ictx->kc = ictx->last_keycode;
1550
1551 /* mce-specific button handling, no keyup events */
1552 else if (ktype == IMON_KEY_MCE) {
1553 ictx->rc_toggle = buf[2];
1554 press_type = 1;
1555
1556 /* incoherent or irrelevant data */
1557 } else if (ictx->kc == KEY_RESERVED)
1558 press_type = -EINVAL;
1559
1560 /* key release of 0xXXXXXXb7 key */
1561 else if (ictx->release_code)
1562 press_type = 0;
1563
1564 /* this is a button press */
1565 else
1566 press_type = 1;
1567
1568 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1569
1570 return press_type;
1571}
1572
1573/*
1574 * Process the incoming packet
1575 */
1576static void imon_incoming_packet(struct imon_context *ictx,
1577 struct urb *urb, int intf)
1578{
1579 int len = urb->actual_length;
1580 unsigned char *buf = urb->transfer_buffer;
1581 struct device *dev = ictx->dev;
1582 unsigned long flags;
1583 u32 kc;
1584 u64 scancode;
1585 int press_type = 0;
1586 ktime_t t;
1587 static ktime_t prev_time;
1588 u8 ktype;
1589
1590 /* filter out junk data on the older 0xffdc imon devices */
1591 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1592 return;
1593
1594 /* Figure out what key was pressed */
1595 if (len == 8 && buf[7] == 0xee) {
1596 scancode = be64_to_cpu(*((__be64 *)buf));
1597 ktype = IMON_KEY_PANEL;
1598 kc = imon_panel_key_lookup(ictx, code: scancode);
1599 ictx->release_code = false;
1600 } else {
1601 scancode = be32_to_cpu(*((__be32 *)buf));
1602 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) {
1603 ktype = IMON_KEY_IMON;
1604 if (buf[0] == 0x80)
1605 ktype = IMON_KEY_MCE;
1606 kc = imon_mce_key_lookup(ictx, scancode);
1607 } else {
1608 ktype = IMON_KEY_IMON;
1609 kc = imon_remote_key_lookup(ictx, scancode);
1610 }
1611 }
1612
1613 spin_lock_irqsave(&ictx->kc_lock, flags);
1614 /* keyboard/mouse mode toggle button */
1615 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1616 ictx->last_keycode = kc;
1617 if (!nomouse) {
1618 ictx->pad_mouse = !ictx->pad_mouse;
1619 dev_dbg(dev, "toggling to %s mode\n",
1620 ictx->pad_mouse ? "mouse" : "keyboard");
1621 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1622 return;
1623 } else {
1624 ictx->pad_mouse = false;
1625 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1626 }
1627 }
1628
1629 ictx->kc = kc;
1630 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1631
1632 /* send touchscreen events through input subsystem if touchpad data */
1633 if (ictx->touch && len == 8 && buf[7] == 0x86) {
1634 imon_touch_event(ictx, buf);
1635 return;
1636
1637 /* look for mouse events with pad in mouse mode */
1638 } else if (ictx->pad_mouse) {
1639 if (imon_mouse_event(ictx, buf, len))
1640 return;
1641 }
1642
1643 /* Now for some special handling to convert pad input to arrow keys */
1644 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1645 ((len == 8) && (buf[0] & 0x40) &&
1646 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1647 len = 8;
1648 imon_pad_to_keys(ictx, buf);
1649 }
1650
1651 if (debug) {
1652 printk(KERN_INFO "intf%d decoded packet: %*ph\n",
1653 intf, len, buf);
1654 }
1655
1656 press_type = imon_parse_press_type(ictx, buf, ktype);
1657 if (press_type < 0)
1658 goto not_input_data;
1659
1660 if (ktype != IMON_KEY_PANEL) {
1661 if (press_type == 0)
1662 rc_keyup(dev: ictx->rdev);
1663 else {
1664 enum rc_proto proto;
1665
1666 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
1667 proto = RC_PROTO_RC6_MCE;
1668 else if (ictx->rc_proto == RC_PROTO_BIT_IMON)
1669 proto = RC_PROTO_IMON;
1670 else
1671 return;
1672
1673 rc_keydown(dev: ictx->rdev, protocol: proto, scancode: ictx->rc_scancode,
1674 toggle: ictx->rc_toggle);
1675
1676 spin_lock_irqsave(&ictx->kc_lock, flags);
1677 ictx->last_keycode = ictx->kc;
1678 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1679 }
1680 return;
1681 }
1682
1683 /* Only panel type events left to process now */
1684 spin_lock_irqsave(&ictx->kc_lock, flags);
1685
1686 t = ktime_get();
1687 /* KEY repeats from knob and panel that need to be suppressed */
1688 if (ictx->kc == KEY_MUTE ||
1689 ictx->dev_descr->flags & IMON_SUPPRESS_REPEATED_KEYS) {
1690 if (ictx->kc == ictx->last_keycode &&
1691 ktime_ms_delta(later: t, earlier: prev_time) < ictx->idev->rep[REP_DELAY]) {
1692 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1693 return;
1694 }
1695 }
1696
1697 prev_time = t;
1698 kc = ictx->kc;
1699
1700 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1701
1702 input_report_key(dev: ictx->idev, code: kc, value: press_type);
1703 input_sync(dev: ictx->idev);
1704
1705 /* panel keys don't generate a release */
1706 input_report_key(dev: ictx->idev, code: kc, value: 0);
1707 input_sync(dev: ictx->idev);
1708
1709 spin_lock_irqsave(&ictx->kc_lock, flags);
1710 ictx->last_keycode = kc;
1711 spin_unlock_irqrestore(lock: &ictx->kc_lock, flags);
1712
1713 return;
1714
1715not_input_data:
1716 if (len != 8) {
1717 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n",
1718 __func__, len, intf);
1719 return;
1720 }
1721
1722 /* iMON 2.4G associate frame */
1723 if (buf[0] == 0x00 &&
1724 buf[2] == 0xFF && /* REFID */
1725 buf[3] == 0xFF &&
1726 buf[4] == 0xFF &&
1727 buf[5] == 0xFF && /* iMON 2.4G */
1728 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1729 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1730 dev_warn(dev, "%s: remote associated refid=%02X\n",
1731 __func__, buf[1]);
1732 ictx->rf_isassociating = false;
1733 }
1734}
1735
1736/*
1737 * Callback function for USB core API: receive data
1738 */
1739static void usb_rx_callback_intf0(struct urb *urb)
1740{
1741 struct imon_context *ictx;
1742 int intfnum = 0;
1743
1744 if (!urb)
1745 return;
1746
1747 ictx = (struct imon_context *)urb->context;
1748 if (!ictx)
1749 return;
1750
1751 /*
1752 * if we get a callback before we're done configuring the hardware, we
1753 * can't yet process the data, as there's nowhere to send it, but we
1754 * still need to submit a new rx URB to avoid wedging the hardware
1755 */
1756 if (!ictx->dev_present_intf0)
1757 goto out;
1758
1759 switch (urb->status) {
1760 case -ENOENT: /* usbcore unlink successful! */
1761 return;
1762
1763 case -ESHUTDOWN: /* transport endpoint was shut down */
1764 break;
1765
1766 case 0:
1767 imon_incoming_packet(ictx, urb, intf: intfnum);
1768 break;
1769
1770 default:
1771 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1772 __func__, urb->status);
1773 break;
1774 }
1775
1776out:
1777 usb_submit_urb(urb: ictx->rx_urb_intf0, GFP_ATOMIC);
1778}
1779
1780static void usb_rx_callback_intf1(struct urb *urb)
1781{
1782 struct imon_context *ictx;
1783 int intfnum = 1;
1784
1785 if (!urb)
1786 return;
1787
1788 ictx = (struct imon_context *)urb->context;
1789 if (!ictx)
1790 return;
1791
1792 /*
1793 * if we get a callback before we're done configuring the hardware, we
1794 * can't yet process the data, as there's nowhere to send it, but we
1795 * still need to submit a new rx URB to avoid wedging the hardware
1796 */
1797 if (!ictx->dev_present_intf1)
1798 goto out;
1799
1800 switch (urb->status) {
1801 case -ENOENT: /* usbcore unlink successful! */
1802 return;
1803
1804 case -ESHUTDOWN: /* transport endpoint was shut down */
1805 break;
1806
1807 case 0:
1808 imon_incoming_packet(ictx, urb, intf: intfnum);
1809 break;
1810
1811 default:
1812 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1813 __func__, urb->status);
1814 break;
1815 }
1816
1817out:
1818 usb_submit_urb(urb: ictx->rx_urb_intf1, GFP_ATOMIC);
1819}
1820
1821/*
1822 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1823 * devices, and all of them constantly spew interrupts, even when there
1824 * is no actual data to report. However, byte 6 of this buffer looks like
1825 * its unique across device variants, so we're trying to key off that to
1826 * figure out which display type (if any) and what IR protocol the device
1827 * actually supports. These devices have their IR protocol hard-coded into
1828 * their firmware, they can't be changed on the fly like the newer hardware.
1829 */
1830static void imon_get_ffdc_type(struct imon_context *ictx)
1831{
1832 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1833 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1834 u64 allowed_protos = RC_PROTO_BIT_IMON;
1835
1836 switch (ffdc_cfg_byte) {
1837 /* iMON Knob, no display, iMON IR + vol knob */
1838 case 0x21:
1839 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1840 ictx->display_supported = false;
1841 break;
1842 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1843 case 0x4e:
1844 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1845 ictx->display_supported = false;
1846 ictx->rf_device = true;
1847 break;
1848 /* iMON VFD, no IR (does have vol knob tho) */
1849 case 0x35:
1850 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1851 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1852 break;
1853 /* iMON VFD, iMON IR */
1854 case 0x24:
1855 case 0x30:
1856 case 0x85:
1857 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1858 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1859 break;
1860 /* iMON VFD, MCE IR */
1861 case 0x46:
1862 case 0x9e:
1863 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1864 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1865 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1866 break;
1867 /* iMON VFD, iMON or MCE IR */
1868 case 0x7e:
1869 dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR");
1870 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1871 allowed_protos |= RC_PROTO_BIT_RC6_MCE;
1872 break;
1873 /* iMON LCD, MCE IR */
1874 case 0x9f:
1875 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1876 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1877 allowed_protos = RC_PROTO_BIT_RC6_MCE;
1878 break;
1879 /* no display, iMON IR */
1880 case 0x26:
1881 dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR");
1882 ictx->display_supported = false;
1883 break;
1884 /* Soundgraph iMON UltraBay */
1885 case 0x98:
1886 dev_info(ictx->dev, "0xffdc iMON UltraBay, LCD + IR");
1887 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1888 allowed_protos = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE;
1889 ictx->dev_descr = &ultrabay_table;
1890 break;
1891
1892 default:
1893 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR");
1894 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1895 /*
1896 * We don't know which one it is, allow user to set the
1897 * RC6 one from userspace if IMON wasn't correct.
1898 */
1899 allowed_protos |= RC_PROTO_BIT_RC6_MCE;
1900 break;
1901 }
1902
1903 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1904
1905 ictx->display_type = detected_display_type;
1906 ictx->rc_proto = allowed_protos;
1907}
1908
1909static void imon_set_display_type(struct imon_context *ictx)
1910{
1911 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1912
1913 /*
1914 * Try to auto-detect the type of display if the user hasn't set
1915 * it by hand via the display_type modparam. Default is VFD.
1916 */
1917
1918 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1919 switch (ictx->product) {
1920 case 0xffdc:
1921 /* set in imon_get_ffdc_type() */
1922 configured_display_type = ictx->display_type;
1923 break;
1924 case 0x0034:
1925 case 0x0035:
1926 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1927 break;
1928 case 0x0038:
1929 case 0x0039:
1930 case 0x0045:
1931 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1932 break;
1933 case 0x003c:
1934 case 0x0041:
1935 case 0x0042:
1936 case 0x0043:
1937 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1938 ictx->display_supported = false;
1939 break;
1940 case 0x0036:
1941 case 0x0044:
1942 default:
1943 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1944 break;
1945 }
1946 } else {
1947 configured_display_type = display_type;
1948 if (display_type == IMON_DISPLAY_TYPE_NONE)
1949 ictx->display_supported = false;
1950 else
1951 ictx->display_supported = true;
1952 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n",
1953 __func__, display_type);
1954 }
1955
1956 ictx->display_type = configured_display_type;
1957}
1958
1959static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1960{
1961 struct rc_dev *rdev;
1962 int ret;
1963 static const unsigned char fp_packet[] = {
1964 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 };
1965
1966 rdev = rc_allocate_device(RC_DRIVER_SCANCODE);
1967 if (!rdev) {
1968 dev_err(ictx->dev, "remote control dev allocation failed\n");
1969 goto out;
1970 }
1971
1972 snprintf(buf: ictx->name_rdev, size: sizeof(ictx->name_rdev),
1973 fmt: "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1974 usb_make_path(dev: ictx->usbdev_intf0, buf: ictx->phys_rdev,
1975 size: sizeof(ictx->phys_rdev));
1976 strlcat(p: ictx->phys_rdev, q: "/input0", avail: sizeof(ictx->phys_rdev));
1977
1978 rdev->device_name = ictx->name_rdev;
1979 rdev->input_phys = ictx->phys_rdev;
1980 usb_to_input_id(dev: ictx->usbdev_intf0, id: &rdev->input_id);
1981 rdev->dev.parent = ictx->dev;
1982
1983 rdev->priv = ictx;
1984 /* iMON PAD or MCE */
1985 rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE;
1986 rdev->change_protocol = imon_ir_change_protocol;
1987 rdev->driver_name = MOD_NAME;
1988
1989 /* Enable front-panel buttons and/or knobs */
1990 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1991 ret = send_packet(ictx);
1992 /* Not fatal, but warn about it */
1993 if (ret)
1994 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1995
1996 if (ictx->product == 0xffdc) {
1997 imon_get_ffdc_type(ictx);
1998 rdev->allowed_protocols = ictx->rc_proto;
1999 }
2000
2001 imon_set_display_type(ictx);
2002
2003 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
2004 rdev->map_name = RC_MAP_IMON_MCE;
2005 else
2006 rdev->map_name = RC_MAP_IMON_PAD;
2007
2008 ret = rc_register_device(dev: rdev);
2009 if (ret < 0) {
2010 dev_err(ictx->dev, "remote input dev register failed\n");
2011 goto out;
2012 }
2013
2014 return rdev;
2015
2016out:
2017 rc_free_device(dev: rdev);
2018 return NULL;
2019}
2020
2021static struct input_dev *imon_init_idev(struct imon_context *ictx)
2022{
2023 const struct imon_panel_key_table *key_table;
2024 struct input_dev *idev;
2025 int ret, i;
2026
2027 key_table = ictx->dev_descr->key_table;
2028
2029 idev = input_allocate_device();
2030 if (!idev)
2031 goto out;
2032
2033 snprintf(buf: ictx->name_idev, size: sizeof(ictx->name_idev),
2034 fmt: "iMON Panel, Knob and Mouse(%04x:%04x)",
2035 ictx->vendor, ictx->product);
2036 idev->name = ictx->name_idev;
2037
2038 usb_make_path(dev: ictx->usbdev_intf0, buf: ictx->phys_idev,
2039 size: sizeof(ictx->phys_idev));
2040 strlcat(p: ictx->phys_idev, q: "/input1", avail: sizeof(ictx->phys_idev));
2041 idev->phys = ictx->phys_idev;
2042
2043 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
2044
2045 idev->keybit[BIT_WORD(BTN_MOUSE)] =
2046 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2047 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
2048 BIT_MASK(REL_WHEEL);
2049
2050 /* panel and/or knob code support */
2051 for (i = 0; key_table[i].hw_code != 0; i++) {
2052 u32 kc = key_table[i].keycode;
2053 __set_bit(kc, idev->keybit);
2054 }
2055
2056 usb_to_input_id(dev: ictx->usbdev_intf0, id: &idev->id);
2057 idev->dev.parent = ictx->dev;
2058 input_set_drvdata(dev: idev, data: ictx);
2059
2060 ret = input_register_device(idev);
2061 if (ret < 0) {
2062 dev_err(ictx->dev, "input dev register failed\n");
2063 goto out;
2064 }
2065
2066 return idev;
2067
2068out:
2069 input_free_device(dev: idev);
2070 return NULL;
2071}
2072
2073static struct input_dev *imon_init_touch(struct imon_context *ictx)
2074{
2075 struct input_dev *touch;
2076 int ret;
2077
2078 touch = input_allocate_device();
2079 if (!touch)
2080 goto touch_alloc_failed;
2081
2082 snprintf(buf: ictx->name_touch, size: sizeof(ictx->name_touch),
2083 fmt: "iMON USB Touchscreen (%04x:%04x)",
2084 ictx->vendor, ictx->product);
2085 touch->name = ictx->name_touch;
2086
2087 usb_make_path(dev: ictx->usbdev_intf1, buf: ictx->phys_touch,
2088 size: sizeof(ictx->phys_touch));
2089 strlcat(p: ictx->phys_touch, q: "/input2", avail: sizeof(ictx->phys_touch));
2090 touch->phys = ictx->phys_touch;
2091
2092 touch->evbit[0] =
2093 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
2094 touch->keybit[BIT_WORD(BTN_TOUCH)] =
2095 BIT_MASK(BTN_TOUCH);
2096 input_set_abs_params(dev: touch, ABS_X,
2097 min: 0x00, max: 0xfff, fuzz: 0, flat: 0);
2098 input_set_abs_params(dev: touch, ABS_Y,
2099 min: 0x00, max: 0xfff, fuzz: 0, flat: 0);
2100
2101 input_set_drvdata(dev: touch, data: ictx);
2102
2103 usb_to_input_id(dev: ictx->usbdev_intf1, id: &touch->id);
2104 touch->dev.parent = ictx->dev;
2105 ret = input_register_device(touch);
2106 if (ret < 0) {
2107 dev_info(ictx->dev, "touchscreen input dev register failed\n");
2108 goto touch_register_failed;
2109 }
2110
2111 return touch;
2112
2113touch_register_failed:
2114 input_free_device(dev: touch);
2115
2116touch_alloc_failed:
2117 return NULL;
2118}
2119
2120static bool imon_find_endpoints(struct imon_context *ictx,
2121 struct usb_host_interface *iface_desc)
2122{
2123 struct usb_endpoint_descriptor *ep;
2124 struct usb_endpoint_descriptor *rx_endpoint = NULL;
2125 struct usb_endpoint_descriptor *tx_endpoint = NULL;
2126 int ifnum = iface_desc->desc.bInterfaceNumber;
2127 int num_endpts = iface_desc->desc.bNumEndpoints;
2128 int i, ep_dir, ep_type;
2129 bool ir_ep_found = false;
2130 bool display_ep_found = false;
2131 bool tx_control = false;
2132
2133 /*
2134 * Scan the endpoint list and set:
2135 * first input endpoint = IR endpoint
2136 * first output endpoint = display endpoint
2137 */
2138 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2139 ep = &iface_desc->endpoint[i].desc;
2140 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2141 ep_type = usb_endpoint_type(epd: ep);
2142
2143 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2144 ep_type == USB_ENDPOINT_XFER_INT) {
2145
2146 rx_endpoint = ep;
2147 ir_ep_found = true;
2148 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2149
2150 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2151 ep_type == USB_ENDPOINT_XFER_INT) {
2152 tx_endpoint = ep;
2153 display_ep_found = true;
2154 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2155 }
2156 }
2157
2158 if (ifnum == 0) {
2159 ictx->rx_endpoint_intf0 = rx_endpoint;
2160 /*
2161 * tx is used to send characters to lcd/vfd, associate RF
2162 * remotes, set IR protocol, and maybe more...
2163 */
2164 ictx->tx_endpoint = tx_endpoint;
2165 } else {
2166 ictx->rx_endpoint_intf1 = rx_endpoint;
2167 }
2168
2169 /*
2170 * If we didn't find a display endpoint, this is probably one of the
2171 * newer iMON devices that use control urb instead of interrupt
2172 */
2173 if (!display_ep_found) {
2174 tx_control = true;
2175 display_ep_found = true;
2176 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n",
2177 __func__);
2178 }
2179
2180 /*
2181 * Some iMON receivers have no display. Unfortunately, it seems
2182 * that SoundGraph recycles device IDs between devices both with
2183 * and without... :\
2184 */
2185 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2186 display_ep_found = false;
2187 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2188 }
2189
2190 /*
2191 * iMON Touch devices have a VGA touchscreen, but no "display", as
2192 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2193 */
2194 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2195 display_ep_found = false;
2196 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2197 }
2198
2199 /* Input endpoint is mandatory */
2200 if (!ir_ep_found)
2201 pr_err("no valid input (IR) endpoint found\n");
2202
2203 ictx->tx_control = tx_control;
2204
2205 if (display_ep_found)
2206 ictx->display_supported = true;
2207
2208 return ir_ep_found;
2209
2210}
2211
2212static struct imon_context *imon_init_intf0(struct usb_interface *intf,
2213 const struct usb_device_id *id)
2214{
2215 struct imon_context *ictx;
2216 struct urb *rx_urb;
2217 struct urb *tx_urb;
2218 struct device *dev = &intf->dev;
2219 struct usb_host_interface *iface_desc;
2220 int ret = -ENOMEM;
2221
2222 ictx = kzalloc(size: sizeof(*ictx), GFP_KERNEL);
2223 if (!ictx)
2224 goto exit;
2225
2226 rx_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL);
2227 if (!rx_urb)
2228 goto rx_urb_alloc_failed;
2229 tx_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL);
2230 if (!tx_urb)
2231 goto tx_urb_alloc_failed;
2232
2233 mutex_init(&ictx->lock);
2234 spin_lock_init(&ictx->kc_lock);
2235
2236 mutex_lock(&ictx->lock);
2237
2238 ictx->dev = dev;
2239 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2240 ictx->rx_urb_intf0 = rx_urb;
2241 ictx->tx_urb = tx_urb;
2242 ictx->rf_device = false;
2243
2244 init_completion(x: &ictx->tx.finished);
2245
2246 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2247 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2248
2249 /* save drive info for later accessing the panel/knob key table */
2250 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info;
2251 /* default send_packet delay is 5ms but some devices need more */
2252 ictx->send_packet_delay = ictx->dev_descr->flags &
2253 IMON_NEED_20MS_PKT_DELAY ? 20 : 5;
2254
2255 ret = -ENODEV;
2256 iface_desc = intf->cur_altsetting;
2257 if (!imon_find_endpoints(ictx, iface_desc)) {
2258 goto find_endpoint_failed;
2259 }
2260
2261 usb_fill_int_urb(urb: ictx->rx_urb_intf0, dev: ictx->usbdev_intf0,
2262 usb_rcvintpipe(ictx->usbdev_intf0,
2263 ictx->rx_endpoint_intf0->bEndpointAddress),
2264 transfer_buffer: ictx->usb_rx_buf, buffer_length: sizeof(ictx->usb_rx_buf),
2265 complete_fn: usb_rx_callback_intf0, context: ictx,
2266 interval: ictx->rx_endpoint_intf0->bInterval);
2267
2268 ret = usb_submit_urb(urb: ictx->rx_urb_intf0, GFP_KERNEL);
2269 if (ret) {
2270 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2271 goto urb_submit_failed;
2272 }
2273
2274 ictx->idev = imon_init_idev(ictx);
2275 if (!ictx->idev) {
2276 dev_err(dev, "%s: input device setup failed\n", __func__);
2277 goto idev_setup_failed;
2278 }
2279
2280 ictx->rdev = imon_init_rdev(ictx);
2281 if (!ictx->rdev) {
2282 dev_err(dev, "%s: rc device setup failed\n", __func__);
2283 goto rdev_setup_failed;
2284 }
2285
2286 ictx->dev_present_intf0 = true;
2287
2288 mutex_unlock(lock: &ictx->lock);
2289 return ictx;
2290
2291rdev_setup_failed:
2292 input_unregister_device(ictx->idev);
2293idev_setup_failed:
2294 usb_kill_urb(urb: ictx->rx_urb_intf0);
2295urb_submit_failed:
2296find_endpoint_failed:
2297 usb_put_dev(dev: ictx->usbdev_intf0);
2298 mutex_unlock(lock: &ictx->lock);
2299 usb_free_urb(urb: tx_urb);
2300tx_urb_alloc_failed:
2301 usb_free_urb(urb: rx_urb);
2302rx_urb_alloc_failed:
2303 kfree(objp: ictx);
2304exit:
2305 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2306
2307 return NULL;
2308}
2309
2310static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2311 struct imon_context *ictx)
2312{
2313 struct urb *rx_urb;
2314 struct usb_host_interface *iface_desc;
2315 int ret = -ENOMEM;
2316
2317 rx_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL);
2318 if (!rx_urb)
2319 goto rx_urb_alloc_failed;
2320
2321 mutex_lock(&ictx->lock);
2322
2323 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2324 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0);
2325 }
2326
2327 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2328 ictx->rx_urb_intf1 = rx_urb;
2329
2330 ret = -ENODEV;
2331 iface_desc = intf->cur_altsetting;
2332 if (!imon_find_endpoints(ictx, iface_desc))
2333 goto find_endpoint_failed;
2334
2335 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2336 ictx->touch = imon_init_touch(ictx);
2337 if (!ictx->touch)
2338 goto touch_setup_failed;
2339 } else
2340 ictx->touch = NULL;
2341
2342 usb_fill_int_urb(urb: ictx->rx_urb_intf1, dev: ictx->usbdev_intf1,
2343 usb_rcvintpipe(ictx->usbdev_intf1,
2344 ictx->rx_endpoint_intf1->bEndpointAddress),
2345 transfer_buffer: ictx->usb_rx_buf, buffer_length: sizeof(ictx->usb_rx_buf),
2346 complete_fn: usb_rx_callback_intf1, context: ictx,
2347 interval: ictx->rx_endpoint_intf1->bInterval);
2348
2349 ret = usb_submit_urb(urb: ictx->rx_urb_intf1, GFP_KERNEL);
2350
2351 if (ret) {
2352 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2353 goto urb_submit_failed;
2354 }
2355
2356 ictx->dev_present_intf1 = true;
2357
2358 mutex_unlock(lock: &ictx->lock);
2359 return ictx;
2360
2361urb_submit_failed:
2362 if (ictx->touch)
2363 input_unregister_device(ictx->touch);
2364touch_setup_failed:
2365find_endpoint_failed:
2366 usb_put_dev(dev: ictx->usbdev_intf1);
2367 ictx->usbdev_intf1 = NULL;
2368 mutex_unlock(lock: &ictx->lock);
2369 usb_free_urb(urb: rx_urb);
2370 ictx->rx_urb_intf1 = NULL;
2371rx_urb_alloc_failed:
2372 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
2373
2374 return NULL;
2375}
2376
2377static void imon_init_display(struct imon_context *ictx,
2378 struct usb_interface *intf)
2379{
2380 int ret;
2381
2382 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2383
2384 /* set up sysfs entry for built-in clock */
2385 ret = sysfs_create_group(kobj: &intf->dev.kobj, grp: &imon_display_attr_group);
2386 if (ret)
2387 dev_err(ictx->dev, "Could not create display sysfs entries(%d)",
2388 ret);
2389
2390 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2391 ret = usb_register_dev(intf, class_driver: &imon_lcd_class);
2392 else
2393 ret = usb_register_dev(intf, class_driver: &imon_vfd_class);
2394 if (ret)
2395 /* Not a fatal error, so ignore */
2396 dev_info(ictx->dev, "could not get a minor number for display\n");
2397
2398}
2399
2400/*
2401 * Callback function for USB core API: Probe
2402 */
2403static int imon_probe(struct usb_interface *interface,
2404 const struct usb_device_id *id)
2405{
2406 struct usb_device *usbdev = NULL;
2407 struct usb_host_interface *iface_desc = NULL;
2408 struct usb_interface *first_if;
2409 struct device *dev = &interface->dev;
2410 int ifnum, sysfs_err;
2411 int ret = 0;
2412 struct imon_context *ictx = NULL;
2413 u16 vendor, product;
2414
2415 usbdev = usb_get_dev(interface_to_usbdev(interface));
2416 iface_desc = interface->cur_altsetting;
2417 ifnum = iface_desc->desc.bInterfaceNumber;
2418 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2419 product = le16_to_cpu(usbdev->descriptor.idProduct);
2420
2421 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2422 __func__, vendor, product, ifnum);
2423
2424 first_if = usb_ifnum_to_if(dev: usbdev, ifnum: 0);
2425 if (!first_if) {
2426 ret = -ENODEV;
2427 goto fail;
2428 }
2429
2430 if (first_if->dev.driver != interface->dev.driver) {
2431 dev_err(&interface->dev, "inconsistent driver matching\n");
2432 ret = -EINVAL;
2433 goto fail;
2434 }
2435
2436 if (ifnum == 0) {
2437 ictx = imon_init_intf0(intf: interface, id);
2438 if (!ictx) {
2439 pr_err("failed to initialize context!\n");
2440 ret = -ENODEV;
2441 goto fail;
2442 }
2443 refcount_set(r: &ictx->users, n: 1);
2444
2445 } else {
2446 /* this is the secondary interface on the device */
2447 struct imon_context *first_if_ctx = usb_get_intfdata(intf: first_if);
2448
2449 /* fail early if first intf failed to register */
2450 if (!first_if_ctx) {
2451 ret = -ENODEV;
2452 goto fail;
2453 }
2454
2455 ictx = imon_init_intf1(intf: interface, ictx: first_if_ctx);
2456 if (!ictx) {
2457 pr_err("failed to attach to context!\n");
2458 ret = -ENODEV;
2459 goto fail;
2460 }
2461 refcount_inc(r: &ictx->users);
2462
2463 }
2464
2465 usb_set_intfdata(intf: interface, data: ictx);
2466
2467 if (ifnum == 0) {
2468 if (product == 0xffdc && ictx->rf_device) {
2469 sysfs_err = sysfs_create_group(kobj: &interface->dev.kobj,
2470 grp: &imon_rf_attr_group);
2471 if (sysfs_err)
2472 pr_err("Could not create RF sysfs entries(%d)\n",
2473 sysfs_err);
2474 }
2475
2476 if (ictx->display_supported)
2477 imon_init_display(ictx, intf: interface);
2478 }
2479
2480 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n",
2481 vendor, product, ifnum,
2482 usbdev->bus->busnum, usbdev->devnum);
2483
2484 usb_put_dev(dev: usbdev);
2485
2486 return 0;
2487
2488fail:
2489 usb_put_dev(dev: usbdev);
2490 dev_err(dev, "unable to register, err %d\n", ret);
2491
2492 return ret;
2493}
2494
2495/*
2496 * Callback function for USB core API: disconnect
2497 */
2498static void imon_disconnect(struct usb_interface *interface)
2499{
2500 struct imon_context *ictx;
2501 struct device *dev;
2502 int ifnum;
2503
2504 ictx = usb_get_intfdata(intf: interface);
2505 ictx->disconnected = true;
2506 dev = ictx->dev;
2507 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2508
2509 /*
2510 * sysfs_remove_group is safe to call even if sysfs_create_group
2511 * hasn't been called
2512 */
2513 sysfs_remove_group(kobj: &interface->dev.kobj, grp: &imon_display_attr_group);
2514 sysfs_remove_group(kobj: &interface->dev.kobj, grp: &imon_rf_attr_group);
2515
2516 usb_set_intfdata(intf: interface, NULL);
2517
2518 /* Abort ongoing write */
2519 if (ictx->tx.busy) {
2520 usb_kill_urb(urb: ictx->tx_urb);
2521 complete(&ictx->tx.finished);
2522 }
2523
2524 if (ifnum == 0) {
2525 ictx->dev_present_intf0 = false;
2526 usb_kill_urb(urb: ictx->rx_urb_intf0);
2527 input_unregister_device(ictx->idev);
2528 rc_unregister_device(dev: ictx->rdev);
2529 if (ictx->display_supported) {
2530 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2531 usb_deregister_dev(intf: interface, class_driver: &imon_lcd_class);
2532 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
2533 usb_deregister_dev(intf: interface, class_driver: &imon_vfd_class);
2534 }
2535 usb_put_dev(dev: ictx->usbdev_intf0);
2536 } else {
2537 ictx->dev_present_intf1 = false;
2538 usb_kill_urb(urb: ictx->rx_urb_intf1);
2539 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2540 del_timer_sync(timer: &ictx->ttimer);
2541 input_unregister_device(ictx->touch);
2542 }
2543 usb_put_dev(dev: ictx->usbdev_intf1);
2544 }
2545
2546 if (refcount_dec_and_test(r: &ictx->users))
2547 free_imon_context(ictx);
2548
2549 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2550 __func__, ifnum);
2551}
2552
2553static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2554{
2555 struct imon_context *ictx = usb_get_intfdata(intf);
2556 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2557
2558 if (ifnum == 0)
2559 usb_kill_urb(urb: ictx->rx_urb_intf0);
2560 else
2561 usb_kill_urb(urb: ictx->rx_urb_intf1);
2562
2563 return 0;
2564}
2565
2566static int imon_resume(struct usb_interface *intf)
2567{
2568 int rc = 0;
2569 struct imon_context *ictx = usb_get_intfdata(intf);
2570 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2571
2572 if (ifnum == 0) {
2573 usb_fill_int_urb(urb: ictx->rx_urb_intf0, dev: ictx->usbdev_intf0,
2574 usb_rcvintpipe(ictx->usbdev_intf0,
2575 ictx->rx_endpoint_intf0->bEndpointAddress),
2576 transfer_buffer: ictx->usb_rx_buf, buffer_length: sizeof(ictx->usb_rx_buf),
2577 complete_fn: usb_rx_callback_intf0, context: ictx,
2578 interval: ictx->rx_endpoint_intf0->bInterval);
2579
2580 rc = usb_submit_urb(urb: ictx->rx_urb_intf0, GFP_NOIO);
2581
2582 } else {
2583 usb_fill_int_urb(urb: ictx->rx_urb_intf1, dev: ictx->usbdev_intf1,
2584 usb_rcvintpipe(ictx->usbdev_intf1,
2585 ictx->rx_endpoint_intf1->bEndpointAddress),
2586 transfer_buffer: ictx->usb_rx_buf, buffer_length: sizeof(ictx->usb_rx_buf),
2587 complete_fn: usb_rx_callback_intf1, context: ictx,
2588 interval: ictx->rx_endpoint_intf1->bInterval);
2589
2590 rc = usb_submit_urb(urb: ictx->rx_urb_intf1, GFP_NOIO);
2591 }
2592
2593 return rc;
2594}
2595
2596module_usb_driver(imon_driver);
2597

source code of linux/drivers/media/rc/imon.c