2 * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
4 * Copyright(C) 2010 Jarod Wilson <jarod@wilsonet.com>
5 * Portions based on the original lirc_imon driver,
6 * Copyright(C) 2004 Venky Raju(dev@venky.ws)
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.
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.
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.
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.
29 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/slab.h>
36 #include <linux/uaccess.h>
37 #include <linux/ratelimit.h>
39 #include <linux/input.h>
40 #include <linux/usb.h>
41 #include <linux/usb/input.h>
42 #include <media/rc-core.h>
44 #include <linux/time.h>
45 #include <linux/timer.h>
47 #define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
48 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
49 #define MOD_NAME "imon"
50 #define MOD_VERSION "0.9.4"
52 #define DISPLAY_MINOR_BASE 144
53 #define DEVICE_NAME "lcd%d"
55 #define BUF_CHUNK_SIZE 8
58 #define BIT_DURATION 250 /* each bit received is 250us */
60 #define IMON_CLOCK_ENABLE_PACKETS 2
62 /*** P R O T O T Y P E S ***/
64 /* USB Callback prototypes */
65 static int imon_probe(struct usb_interface *interface,
66 const struct usb_device_id *id);
67 static void imon_disconnect(struct usb_interface *interface);
68 static void usb_rx_callback_intf0(struct urb *urb);
69 static void usb_rx_callback_intf1(struct urb *urb);
70 static void usb_tx_callback(struct urb *urb);
72 /* suspend/resume support */
73 static int imon_resume(struct usb_interface *intf);
74 static int imon_suspend(struct usb_interface *intf, pm_message_t message);
76 /* Display file_operations function prototypes */
77 static int display_open(struct inode *inode, struct file *file);
78 static int display_close(struct inode *inode, struct file *file);
80 /* VFD write operation */
81 static ssize_t vfd_write(struct file *file, const char *buf,
82 size_t n_bytes, loff_t *pos);
84 /* LCD file_operations override function prototypes */
85 static ssize_t lcd_write(struct file *file, const char *buf,
86 size_t n_bytes, loff_t *pos);
88 /*** G L O B A L S ***/
92 /* Newer devices have two interfaces */
93 struct usb_device *usbdev_intf0;
94 struct usb_device *usbdev_intf1;
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 */
103 struct mutex lock; /* to lock this object */
104 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
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;
113 unsigned char usb_rx_buf[8];
114 unsigned char usb_tx_buf[8];
115 unsigned int send_packet_delay;
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 */
124 u16 vendor; /* usb vendor ID */
125 u16 product; /* usb product ID */
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 */
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_type; /* iMON or MCE (RC6) IR protocol? */
137 bool release_code; /* some keys send a release code */
139 u8 display_type; /* store the display type */
140 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
142 char name_rdev[128]; /* rc input device name */
143 char phys_rdev[64]; /* rc input device phys path */
145 char name_idev[128]; /* input device name */
146 char phys_idev[64]; /* input device phys path */
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 */
155 #define TOUCH_TIMEOUT (HZ/30)
157 /* vfd character device file operations */
158 static const struct file_operations vfd_fops = {
159 .owner = THIS_MODULE,
160 .open = &display_open,
162 .release = &display_close,
163 .llseek = noop_llseek,
166 /* lcd character device file operations */
167 static const struct file_operations lcd_fops = {
168 .owner = THIS_MODULE,
169 .open = &display_open,
171 .release = &display_close,
172 .llseek = noop_llseek,
176 IMON_DISPLAY_TYPE_AUTO = 0,
177 IMON_DISPLAY_TYPE_VFD = 1,
178 IMON_DISPLAY_TYPE_LCD = 2,
179 IMON_DISPLAY_TYPE_VGA = 3,
180 IMON_DISPLAY_TYPE_NONE = 4,
190 IMON_NEED_20MS_PKT_DELAY = 1
194 * USB Device ID for iMON USB Control Boards
196 * The Windows drivers contain 6 different inf files, more or less one for
197 * each new device until the 0x0034-0x0046 devices, which all use the same
198 * driver. Some of the devices in the 34-46 range haven't been definitively
199 * identified yet. Early devices have either a TriGem Computer, Inc. or a
200 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
201 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports
202 * the ffdc and later devices, which do onboard decoding.
204 static struct usb_device_id imon_usb_id_table[] = {
206 * Several devices with this same device ID, all use iMON_PAD.inf
207 * SoundGraph iMON PAD (IR & VFD)
208 * SoundGraph iMON PAD (IR & LCD)
209 * SoundGraph iMON Knob (IR only)
211 { USB_DEVICE(0x15c2, 0xffdc) },
214 * Newer devices, all driven by the latest iMON Windows driver, full
215 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
216 * Need user input to fill in details on unknown devices.
218 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
219 { USB_DEVICE(0x15c2, 0x0034) },
220 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
221 { USB_DEVICE(0x15c2, 0x0035) },
222 /* SoundGraph iMON OEM VFD (IR & VFD) */
223 { USB_DEVICE(0x15c2, 0x0036), .driver_info = IMON_NEED_20MS_PKT_DELAY },
224 /* device specifics unknown */
225 { USB_DEVICE(0x15c2, 0x0037) },
226 /* SoundGraph iMON OEM LCD (IR & LCD) */
227 { USB_DEVICE(0x15c2, 0x0038) },
228 /* SoundGraph iMON UltraBay (IR & LCD) */
229 { USB_DEVICE(0x15c2, 0x0039) },
230 /* device specifics unknown */
231 { USB_DEVICE(0x15c2, 0x003a) },
232 /* device specifics unknown */
233 { USB_DEVICE(0x15c2, 0x003b) },
234 /* SoundGraph iMON OEM Inside (IR only) */
235 { USB_DEVICE(0x15c2, 0x003c) },
236 /* device specifics unknown */
237 { USB_DEVICE(0x15c2, 0x003d) },
238 /* device specifics unknown */
239 { USB_DEVICE(0x15c2, 0x003e) },
240 /* device specifics unknown */
241 { USB_DEVICE(0x15c2, 0x003f) },
242 /* device specifics unknown */
243 { USB_DEVICE(0x15c2, 0x0040) },
244 /* SoundGraph iMON MINI (IR only) */
245 { USB_DEVICE(0x15c2, 0x0041) },
246 /* Antec Veris Multimedia Station EZ External (IR only) */
247 { USB_DEVICE(0x15c2, 0x0042) },
248 /* Antec Veris Multimedia Station Basic Internal (IR only) */
249 { USB_DEVICE(0x15c2, 0x0043) },
250 /* Antec Veris Multimedia Station Elite (IR & VFD) */
251 { USB_DEVICE(0x15c2, 0x0044) },
252 /* Antec Veris Multimedia Station Premiere (IR & LCD) */
253 { USB_DEVICE(0x15c2, 0x0045) },
254 /* device specifics unknown */
255 { USB_DEVICE(0x15c2, 0x0046) },
259 /* USB Device data */
260 static struct usb_driver imon_driver = {
263 .disconnect = imon_disconnect,
264 .suspend = imon_suspend,
265 .resume = imon_resume,
266 .id_table = imon_usb_id_table,
269 static struct usb_class_driver imon_vfd_class = {
272 .minor_base = DISPLAY_MINOR_BASE,
275 static struct usb_class_driver imon_lcd_class = {
278 .minor_base = DISPLAY_MINOR_BASE,
281 /* imon receiver front panel/knob key table */
282 static const struct {
285 } imon_panel_key_table[] = {
286 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
287 { 0x000000001200ffeell, KEY_UP },
288 { 0x000000001300ffeell, KEY_DOWN },
289 { 0x000000001400ffeell, KEY_LEFT },
290 { 0x000000001500ffeell, KEY_RIGHT },
291 { 0x000000001600ffeell, KEY_ENTER },
292 { 0x000000001700ffeell, KEY_ESC },
293 { 0x000000001f00ffeell, KEY_AUDIO },
294 { 0x000000002000ffeell, KEY_VIDEO },
295 { 0x000000002100ffeell, KEY_CAMERA },
296 { 0x000000002700ffeell, KEY_DVD },
297 { 0x000000002300ffeell, KEY_TV },
298 { 0x000000002b00ffeell, KEY_EXIT },
299 { 0x000000002c00ffeell, KEY_SELECT },
300 { 0x000000002d00ffeell, KEY_MENU },
301 { 0x000000000500ffeell, KEY_PREVIOUS },
302 { 0x000000000700ffeell, KEY_REWIND },
303 { 0x000000000400ffeell, KEY_STOP },
304 { 0x000000003c00ffeell, KEY_PLAYPAUSE },
305 { 0x000000000800ffeell, KEY_FASTFORWARD },
306 { 0x000000000600ffeell, KEY_NEXT },
307 { 0x000000010000ffeell, KEY_RIGHT },
308 { 0x000001000000ffeell, KEY_LEFT },
309 { 0x000000003d00ffeell, KEY_SELECT },
310 { 0x000100000000ffeell, KEY_VOLUMEUP },
311 { 0x010000000000ffeell, KEY_VOLUMEDOWN },
312 { 0x000000000100ffeell, KEY_MUTE },
313 /* 0xffdc iMON MCE VFD */
314 { 0x00010000ffffffeell, KEY_VOLUMEUP },
315 { 0x01000000ffffffeell, KEY_VOLUMEDOWN },
316 { 0x00000001ffffffeell, KEY_MUTE },
317 { 0x0000000fffffffeell, KEY_MEDIA },
318 { 0x00000012ffffffeell, KEY_UP },
319 { 0x00000013ffffffeell, KEY_DOWN },
320 { 0x00000014ffffffeell, KEY_LEFT },
321 { 0x00000015ffffffeell, KEY_RIGHT },
322 { 0x00000016ffffffeell, KEY_ENTER },
323 { 0x00000017ffffffeell, KEY_ESC },
324 /* iMON Knob values */
325 { 0x000100ffffffffeell, KEY_VOLUMEUP },
326 { 0x010000ffffffffeell, KEY_VOLUMEDOWN },
327 { 0x000008ffffffffeell, KEY_MUTE },
330 /* to prevent races between open() and disconnect(), probing, etc */
331 static DEFINE_MUTEX(driver_lock);
333 /* Module bookkeeping bits */
334 MODULE_AUTHOR(MOD_AUTHOR);
335 MODULE_DESCRIPTION(MOD_DESC);
336 MODULE_VERSION(MOD_VERSION);
337 MODULE_LICENSE("GPL");
338 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
341 module_param(debug, bool, S_IRUGO | S_IWUSR);
342 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
344 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
345 static int display_type;
346 module_param(display_type, int, S_IRUGO);
347 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
348 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
350 static int pad_stabilize = 1;
351 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
352 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
353 "presses in arrow key mode. 0=disable, 1=enable (default).");
356 * In certain use cases, mouse mode isn't really helpful, and could actually
357 * cause confusion, so allow disabling it when the IR device is open.
360 module_param(nomouse, bool, S_IRUGO | S_IWUSR);
361 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
362 "open. 0=don't disable, 1=disable. (default: don't disable)");
364 /* threshold at which a pad push registers as an arrow key in kbd mode */
365 static int pad_thresh;
366 module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
367 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
368 "arrow key in kbd mode (default: 28)");
371 static void free_imon_context(struct imon_context *ictx)
373 struct device *dev = ictx->dev;
375 usb_free_urb(ictx->tx_urb);
376 usb_free_urb(ictx->rx_urb_intf0);
377 usb_free_urb(ictx->rx_urb_intf1);
380 dev_dbg(dev, "%s: iMON context freed\n", __func__);
384 * Called when the Display device (e.g. /dev/lcd0)
385 * is opened by the application.
387 static int display_open(struct inode *inode, struct file *file)
389 struct usb_interface *interface;
390 struct imon_context *ictx = NULL;
394 /* prevent races with disconnect */
395 mutex_lock(&driver_lock);
397 subminor = iminor(inode);
398 interface = usb_find_interface(&imon_driver, subminor);
400 pr_err("could not find interface for minor %d\n", subminor);
404 ictx = usb_get_intfdata(interface);
407 pr_err("no context found for minor %d\n", subminor);
412 mutex_lock(&ictx->lock);
414 if (!ictx->display_supported) {
415 pr_err("display not supported by device\n");
417 } else if (ictx->display_isopen) {
418 pr_err("display port is already open\n");
421 ictx->display_isopen = true;
422 file->private_data = ictx;
423 dev_dbg(ictx->dev, "display port opened\n");
426 mutex_unlock(&ictx->lock);
429 mutex_unlock(&driver_lock);
434 * Called when the display device (e.g. /dev/lcd0)
435 * is closed by the application.
437 static int display_close(struct inode *inode, struct file *file)
439 struct imon_context *ictx = NULL;
442 ictx = file->private_data;
445 pr_err("no context for device\n");
449 mutex_lock(&ictx->lock);
451 if (!ictx->display_supported) {
452 pr_err("display not supported by device\n");
454 } else if (!ictx->display_isopen) {
455 pr_err("display is not open\n");
458 ictx->display_isopen = false;
459 dev_dbg(ictx->dev, "display port closed\n");
462 mutex_unlock(&ictx->lock);
467 * Sends a packet to the device -- this function must be called with
468 * ictx->lock held, or its unlock/lock sequence while waiting for tx
469 * to complete can/will lead to a deadlock.
471 static int send_packet(struct imon_context *ictx)
474 unsigned long timeout;
477 struct usb_ctrlrequest *control_req = NULL;
479 /* Check if we need to use control or interrupt urb */
480 if (!ictx->tx_control) {
481 pipe = usb_sndintpipe(ictx->usbdev_intf0,
482 ictx->tx_endpoint->bEndpointAddress);
483 interval = ictx->tx_endpoint->bInterval;
485 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
487 sizeof(ictx->usb_tx_buf),
488 usb_tx_callback, ictx, interval);
490 ictx->tx_urb->actual_length = 0;
492 /* fill request into kmalloc'ed space: */
493 control_req = kmalloc(sizeof(struct usb_ctrlrequest),
495 if (control_req == NULL)
498 /* setup packet is '21 09 0200 0001 0008' */
499 control_req->bRequestType = 0x21;
500 control_req->bRequest = 0x09;
501 control_req->wValue = cpu_to_le16(0x0200);
502 control_req->wIndex = cpu_to_le16(0x0001);
503 control_req->wLength = cpu_to_le16(0x0008);
505 /* control pipe is endpoint 0x00 */
506 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
508 /* build the control urb */
509 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
510 pipe, (unsigned char *)control_req,
512 sizeof(ictx->usb_tx_buf),
513 usb_tx_callback, ictx);
514 ictx->tx_urb->actual_length = 0;
517 init_completion(&ictx->tx.finished);
518 ictx->tx.busy = true;
519 smp_rmb(); /* ensure later readers know we're busy */
521 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
523 ictx->tx.busy = false;
524 smp_rmb(); /* ensure later readers know we're not busy */
525 pr_err_ratelimited("error submitting urb(%d)\n", retval);
527 /* Wait for transmission to complete (or abort) */
528 mutex_unlock(&ictx->lock);
529 retval = wait_for_completion_interruptible(
532 pr_err_ratelimited("task interrupted\n");
533 mutex_lock(&ictx->lock);
535 retval = ictx->tx.status;
537 pr_err_ratelimited("packet tx failed (%d)\n", retval);
543 * Induce a mandatory delay before returning, as otherwise,
544 * send_packet can get called so rapidly as to overwhelm the device,
545 * particularly on faster systems and/or those with quirky usb.
547 timeout = msecs_to_jiffies(ictx->send_packet_delay);
548 set_current_state(TASK_INTERRUPTIBLE);
549 schedule_timeout(timeout);
555 * Sends an associate packet to the iMON 2.4G.
557 * This might not be such a good idea, since it has an id collision with
558 * some versions of the "IR & VFD" combo. The only way to determine if it
559 * is an RF version is to look at the product description string. (Which
560 * we currently do not fetch).
562 static int send_associate_24g(struct imon_context *ictx)
565 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
566 0x00, 0x00, 0x00, 0x20 };
569 pr_err("no context for device\n");
573 if (!ictx->dev_present_intf0) {
574 pr_err("no iMON device present\n");
578 memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
579 retval = send_packet(ictx);
585 * Sends packets to setup and show clock on iMON display
587 * Arguments: year - last 2 digits of year, month - 1..12,
588 * day - 1..31, dow - day of the week (0-Sun...6-Sat),
589 * hour - 0..23, minute - 0..59, second - 0..59
591 static int send_set_imon_clock(struct imon_context *ictx,
592 unsigned int year, unsigned int month,
593 unsigned int day, unsigned int dow,
594 unsigned int hour, unsigned int minute,
597 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
602 pr_err("no context for device\n");
606 switch (ictx->display_type) {
607 case IMON_DISPLAY_TYPE_LCD:
608 clock_enable_pkt[0][0] = 0x80;
609 clock_enable_pkt[0][1] = year;
610 clock_enable_pkt[0][2] = month-1;
611 clock_enable_pkt[0][3] = day;
612 clock_enable_pkt[0][4] = hour;
613 clock_enable_pkt[0][5] = minute;
614 clock_enable_pkt[0][6] = second;
616 clock_enable_pkt[1][0] = 0x80;
617 clock_enable_pkt[1][1] = 0;
618 clock_enable_pkt[1][2] = 0;
619 clock_enable_pkt[1][3] = 0;
620 clock_enable_pkt[1][4] = 0;
621 clock_enable_pkt[1][5] = 0;
622 clock_enable_pkt[1][6] = 0;
624 if (ictx->product == 0xffdc) {
625 clock_enable_pkt[0][7] = 0x50;
626 clock_enable_pkt[1][7] = 0x51;
628 clock_enable_pkt[0][7] = 0x88;
629 clock_enable_pkt[1][7] = 0x8a;
634 case IMON_DISPLAY_TYPE_VFD:
635 clock_enable_pkt[0][0] = year;
636 clock_enable_pkt[0][1] = month-1;
637 clock_enable_pkt[0][2] = day;
638 clock_enable_pkt[0][3] = dow;
639 clock_enable_pkt[0][4] = hour;
640 clock_enable_pkt[0][5] = minute;
641 clock_enable_pkt[0][6] = second;
642 clock_enable_pkt[0][7] = 0x40;
644 clock_enable_pkt[1][0] = 0;
645 clock_enable_pkt[1][1] = 0;
646 clock_enable_pkt[1][2] = 1;
647 clock_enable_pkt[1][3] = 0;
648 clock_enable_pkt[1][4] = 0;
649 clock_enable_pkt[1][5] = 0;
650 clock_enable_pkt[1][6] = 0;
651 clock_enable_pkt[1][7] = 0x42;
659 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
660 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
661 retval = send_packet(ictx);
663 pr_err("send_packet failed for packet %d\n", i);
672 * These are the sysfs functions to handle the association on the iMON 2.4G LT.
674 static ssize_t show_associate_remote(struct device *d,
675 struct device_attribute *attr,
678 struct imon_context *ictx = dev_get_drvdata(d);
683 mutex_lock(&ictx->lock);
684 if (ictx->rf_isassociating)
685 strcpy(buf, "associating\n");
687 strcpy(buf, "closed\n");
689 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
690 "instructions on how to associate your iMON 2.4G DT/LT "
692 mutex_unlock(&ictx->lock);
696 static ssize_t store_associate_remote(struct device *d,
697 struct device_attribute *attr,
698 const char *buf, size_t count)
700 struct imon_context *ictx;
702 ictx = dev_get_drvdata(d);
707 mutex_lock(&ictx->lock);
708 ictx->rf_isassociating = true;
709 send_associate_24g(ictx);
710 mutex_unlock(&ictx->lock);
716 * sysfs functions to control internal imon clock
718 static ssize_t show_imon_clock(struct device *d,
719 struct device_attribute *attr, char *buf)
721 struct imon_context *ictx = dev_get_drvdata(d);
727 mutex_lock(&ictx->lock);
729 if (!ictx->display_supported) {
730 len = snprintf(buf, PAGE_SIZE, "Not supported.");
732 len = snprintf(buf, PAGE_SIZE,
733 "To set the clock on your iMON display:\n"
734 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
735 "%s", ictx->display_isopen ?
736 "\nNOTE: imon device must be closed\n" : "");
739 mutex_unlock(&ictx->lock);
744 static ssize_t store_imon_clock(struct device *d,
745 struct device_attribute *attr,
746 const char *buf, size_t count)
748 struct imon_context *ictx = dev_get_drvdata(d);
750 unsigned int year, month, day, dow, hour, minute, second;
755 mutex_lock(&ictx->lock);
757 if (!ictx->display_supported) {
760 } else if (ictx->display_isopen) {
765 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
766 &hour, &minute, &second) != 7) {
771 if ((month < 1 || month > 12) ||
772 (day < 1 || day > 31) || (dow > 6) ||
773 (hour > 23) || (minute > 59) || (second > 59)) {
778 retval = send_set_imon_clock(ictx, year, month, day, dow,
779 hour, minute, second);
785 mutex_unlock(&ictx->lock);
791 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
794 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
795 store_associate_remote);
797 static struct attribute *imon_display_sysfs_entries[] = {
798 &dev_attr_imon_clock.attr,
802 static struct attribute_group imon_display_attr_group = {
803 .attrs = imon_display_sysfs_entries
806 static struct attribute *imon_rf_sysfs_entries[] = {
807 &dev_attr_associate_remote.attr,
811 static struct attribute_group imon_rf_attr_group = {
812 .attrs = imon_rf_sysfs_entries
816 * Writes data to the VFD. The iMON VFD is 2x16 characters
817 * and requires data in 5 consecutive USB interrupt packets,
818 * each packet but the last carrying 7 bytes.
820 * I don't know if the VFD board supports features such as
821 * scrolling, clearing rows, blanking, etc. so at
822 * the caller must provide a full screen of data. If fewer
823 * than 32 bytes are provided spaces will be appended to
824 * generate a full screen.
826 static ssize_t vfd_write(struct file *file, const char *buf,
827 size_t n_bytes, loff_t *pos)
833 struct imon_context *ictx;
834 const unsigned char vfd_packet6[] = {
835 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
837 ictx = file->private_data;
839 pr_err_ratelimited("no context for device\n");
843 mutex_lock(&ictx->lock);
845 if (!ictx->dev_present_intf0) {
846 pr_err_ratelimited("no iMON device present\n");
851 if (n_bytes <= 0 || n_bytes > 32) {
852 pr_err_ratelimited("invalid payload size\n");
857 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
862 /* Pad with spaces */
863 for (i = n_bytes; i < 32; ++i)
864 ictx->tx.data_buf[i] = ' ';
866 for (i = 32; i < 35; ++i)
867 ictx->tx.data_buf[i] = 0xFF;
873 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
874 ictx->usb_tx_buf[7] = (unsigned char) seq;
876 retval = send_packet(ictx);
878 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
885 } while (offset < 35);
888 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
889 ictx->usb_tx_buf[7] = (unsigned char) seq;
890 retval = send_packet(ictx);
892 pr_err_ratelimited("send packet #%d failed\n", seq / 2);
895 mutex_unlock(&ictx->lock);
897 return (!retval) ? n_bytes : retval;
901 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
902 * packets. We accept data as 16 hexadecimal digits, followed by a
903 * newline (to make it easy to drive the device from a command-line
904 * -- even though the actual binary data is a bit complicated).
906 * The device itself is not a "traditional" text-mode display. It's
907 * actually a 16x96 pixel bitmap display. That means if you want to
908 * display text, you've got to have your own "font" and translate the
909 * text into bitmaps for display. This is really flexible (you can
910 * display whatever diacritics you need, and so on), but it's also
911 * a lot more complicated than most LCDs...
913 static ssize_t lcd_write(struct file *file, const char *buf,
914 size_t n_bytes, loff_t *pos)
917 struct imon_context *ictx;
919 ictx = file->private_data;
921 pr_err_ratelimited("no context for device\n");
925 mutex_lock(&ictx->lock);
927 if (!ictx->display_supported) {
928 pr_err_ratelimited("no iMON display present\n");
934 pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
940 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
945 retval = send_packet(ictx);
947 pr_err_ratelimited("send packet failed!\n");
950 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
951 __func__, (int) n_bytes);
954 mutex_unlock(&ictx->lock);
955 return (!retval) ? n_bytes : retval;
959 * Callback function for USB core API: transmit data
961 static void usb_tx_callback(struct urb *urb)
963 struct imon_context *ictx;
967 ictx = (struct imon_context *)urb->context;
971 ictx->tx.status = urb->status;
973 /* notify waiters that write has finished */
974 ictx->tx.busy = false;
975 smp_rmb(); /* ensure later readers know we're not busy */
976 complete(&ictx->tx.finished);
980 * report touchscreen input
982 static void imon_touch_display_timeout(unsigned long data)
984 struct imon_context *ictx = (struct imon_context *)data;
986 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
989 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
990 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
991 input_report_key(ictx->touch, BTN_TOUCH, 0x00);
992 input_sync(ictx->touch);
996 * iMON IR receivers support two different signal sets -- those used by
997 * the iMON remotes, and those used by the Windows MCE remotes (which is
998 * really just RC-6), but only one or the other at a time, as the signals
999 * are decoded onboard the receiver.
1001 * This function gets called two different ways, one way is from
1002 * rc_register_device, for initial protocol selection/setup, and the other is
1003 * via a userspace-initiated protocol change request, either by direct sysfs
1004 * prodding or by something like ir-keytable. In the rc_register_device case,
1005 * the imon context lock is already held, but when initiated from userspace,
1006 * it is not, so we must acquire it prior to calling send_packet, which
1007 * requires that the lock is held.
1009 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_type)
1012 struct imon_context *ictx = rc->priv;
1013 struct device *dev = ictx->dev;
1014 bool unlock = false;
1015 unsigned char ir_proto_packet[] = {
1016 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
1018 if (*rc_type && !(*rc_type & rc->allowed_protos))
1019 dev_warn(dev, "Looks like you're trying to use an IR protocol "
1020 "this device does not support\n");
1022 if (*rc_type & RC_BIT_RC6_MCE) {
1023 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
1024 ir_proto_packet[0] = 0x01;
1025 *rc_type = RC_BIT_RC6_MCE;
1026 } else if (*rc_type & RC_BIT_OTHER) {
1027 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
1029 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1030 /* ir_proto_packet[0] = 0x00; // already the default */
1031 *rc_type = RC_BIT_OTHER;
1033 dev_warn(dev, "Unsupported IR protocol specified, overriding "
1034 "to iMON IR protocol\n");
1036 dev_dbg(dev, "PAD stabilize functionality disabled\n");
1037 /* ir_proto_packet[0] = 0x00; // already the default */
1038 *rc_type = RC_BIT_OTHER;
1041 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
1043 if (!mutex_is_locked(&ictx->lock)) {
1045 mutex_lock(&ictx->lock);
1048 retval = send_packet(ictx);
1052 ictx->rc_type = *rc_type;
1053 ictx->pad_mouse = false;
1057 mutex_unlock(&ictx->lock);
1062 static inline int tv2int(const struct timeval *a, const struct timeval *b)
1067 if (b->tv_usec > a->tv_usec) {
1072 usecs += a->tv_usec - b->tv_usec;
1074 sec += a->tv_sec - b->tv_sec;
1086 * The directional pad behaves a bit differently, depending on whether this is
1087 * one of the older ffdc devices or a newer device. Newer devices appear to
1088 * have a higher resolution matrix for more precise mouse movement, but it
1089 * makes things overly sensitive in keyboard mode, so we do some interesting
1090 * contortions to make it less touchy. Older devices run through the same
1091 * routine with shorter timeout and a smaller threshold.
1093 static int stabilize(int a, int b, u16 timeout, u16 threshold)
1096 static struct timeval prev_time = {0, 0};
1097 static struct timeval hit_time = {0, 0};
1098 static int x, y, prev_result, hits;
1102 do_gettimeofday(&ct);
1103 msec = tv2int(&ct, &prev_time);
1104 msec_hit = tv2int(&ct, &hit_time);
1117 if (abs(x) > threshold || abs(y) > threshold) {
1118 if (abs(y) > abs(x))
1119 result = (y > 0) ? 0x7F : 0x80;
1121 result = (x > 0) ? 0x7F00 : 0x8000;
1126 if (result == prev_result) {
1132 y = 17 * threshold / 30;
1135 y -= 17 * threshold / 30;
1138 x = 17 * threshold / 30;
1141 x -= 17 * threshold / 30;
1146 if (hits == 2 && msec_hit < timeout) {
1151 prev_result = result;
1160 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode)
1164 bool is_release_code = false;
1166 /* Look for the initial press of a button */
1167 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1168 ictx->rc_toggle = 0x0;
1169 ictx->rc_scancode = scancode;
1171 /* Look for the release of a button */
1172 if (keycode == KEY_RESERVED) {
1173 release = scancode & ~0x4000;
1174 keycode = rc_g_keycode_from_table(ictx->rdev, release);
1175 if (keycode != KEY_RESERVED)
1176 is_release_code = true;
1179 ictx->release_code = is_release_code;
1184 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode)
1188 #define MCE_KEY_MASK 0x7000
1189 #define MCE_TOGGLE_BIT 0x8000
1192 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
1193 * (the toggle bit flipping between alternating key presses), while
1194 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
1195 * the table trim, we always or in the bits to look up 0x8000ff4xx,
1196 * but we can't or them into all codes, as some keys are decoded in
1197 * a different way w/o the same use of the toggle bit...
1199 if (scancode & 0x80000000)
1200 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
1202 ictx->rc_scancode = scancode;
1203 keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
1205 /* not used in mce mode, but make sure we know its false */
1206 ictx->release_code = false;
1211 static u32 imon_panel_key_lookup(u64 code)
1214 u32 keycode = KEY_RESERVED;
1216 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1217 if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
1218 keycode = imon_panel_key_table[i].keycode;
1226 static bool imon_mouse_event(struct imon_context *ictx,
1227 unsigned char *buf, int len)
1229 signed char rel_x = 0x00, rel_y = 0x00;
1231 bool mouse_input = true;
1233 unsigned long flags;
1235 spin_lock_irqsave(&ictx->kc_lock, flags);
1237 /* newer iMON device PAD or mouse button */
1238 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
1242 /* 0xffdc iMON PAD or mouse button input */
1243 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
1244 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
1245 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1246 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1249 rel_x = rel_x + rel_x / 2;
1250 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1251 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1254 rel_y = rel_y + rel_y / 2;
1256 /* some ffdc devices decode mouse buttons differently... */
1257 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
1259 /* ch+/- buttons, which we use for an emulated scroll wheel */
1260 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
1262 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
1265 mouse_input = false;
1267 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1270 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
1273 input_report_rel(ictx->idev, REL_WHEEL, dir);
1274 } else if (rel_x || rel_y) {
1275 input_report_rel(ictx->idev, REL_X, rel_x);
1276 input_report_rel(ictx->idev, REL_Y, rel_y);
1278 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
1279 input_report_key(ictx->idev, BTN_RIGHT,
1280 buf[1] >> right_shift & 0x1);
1282 input_sync(ictx->idev);
1283 spin_lock_irqsave(&ictx->kc_lock, flags);
1284 ictx->last_keycode = ictx->kc;
1285 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1291 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
1293 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
1294 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
1295 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
1296 input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
1297 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
1298 input_report_key(ictx->touch, BTN_TOUCH, 0x01);
1299 input_sync(ictx->touch);
1302 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
1305 signed char rel_x = 0x00, rel_y = 0x00;
1306 u16 timeout, threshold;
1307 u32 scancode = KEY_RESERVED;
1308 unsigned long flags;
1311 * The imon directional pad functions more like a touchpad. Bytes 3 & 4
1312 * contain a position coordinate (x,y), with each component ranging
1313 * from -14 to 14. We want to down-sample this to only 4 discrete values
1314 * for up/down/left/right arrow keys. Also, when you get too close to
1315 * diagonals, it has a tendency to jump back and forth, so lets try to
1316 * ignore when they get too close.
1318 if (ictx->product != 0xffdc) {
1319 /* first, pad to 8 bytes so it conforms with everything else */
1320 buf[5] = buf[6] = buf[7] = 0;
1321 timeout = 500; /* in msecs */
1322 /* (2*threshold) x (2*threshold) square */
1323 threshold = pad_thresh ? pad_thresh : 28;
1327 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) {
1328 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
1329 dir = stabilize((int)rel_x, (int)rel_y,
1330 timeout, threshold);
1332 spin_lock_irqsave(&ictx->kc_lock,
1334 ictx->kc = KEY_UNKNOWN;
1335 spin_unlock_irqrestore(&ictx->kc_lock,
1339 buf[2] = dir & 0xFF;
1340 buf[3] = (dir >> 8) & 0xFF;
1341 scancode = be32_to_cpu(*((u32 *)buf));
1345 * Hack alert: instead of using keycodes, we have
1346 * to use hard-coded scancodes here...
1348 if (abs(rel_y) > abs(rel_x)) {
1349 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1352 scancode = 0x01007f00; /* KEY_DOWN */
1354 scancode = 0x01008000; /* KEY_UP */
1357 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1359 scancode = 0x0100007f; /* KEY_RIGHT */
1361 scancode = 0x01000080; /* KEY_LEFT */
1366 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
1367 * device (15c2:ffdc). The remote generates various codes from
1368 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
1369 * 0x688301b7 and the right one 0x688481b7. All other keys generate
1370 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
1371 * reversed endianess. Extract direction from buffer, rotate endianess,
1372 * adjust sign and feed the values into stabilize(). The resulting codes
1373 * will be 0x01008000, 0x01007F00, which match the newer devices.
1376 timeout = 10; /* in msecs */
1377 /* (2*threshold) x (2*threshold) square */
1378 threshold = pad_thresh ? pad_thresh : 15;
1381 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
1382 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
1386 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
1387 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
1392 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
1394 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) {
1395 dir = stabilize((int)rel_x, (int)rel_y,
1396 timeout, threshold);
1398 spin_lock_irqsave(&ictx->kc_lock, flags);
1399 ictx->kc = KEY_UNKNOWN;
1400 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1403 buf[2] = dir & 0xFF;
1404 buf[3] = (dir >> 8) & 0xFF;
1405 scancode = be32_to_cpu(*((u32 *)buf));
1408 * Hack alert: instead of using keycodes, we have
1409 * to use hard-coded scancodes here...
1411 if (abs(rel_y) > abs(rel_x)) {
1412 buf[2] = (rel_y > 0) ? 0x7F : 0x80;
1415 scancode = 0x01007f00; /* KEY_DOWN */
1417 scancode = 0x01008000; /* KEY_UP */
1420 buf[3] = (rel_x > 0) ? 0x7F : 0x80;
1422 scancode = 0x0100007f; /* KEY_RIGHT */
1424 scancode = 0x01000080; /* KEY_LEFT */
1430 spin_lock_irqsave(&ictx->kc_lock, flags);
1431 ictx->kc = imon_remote_key_lookup(ictx, scancode);
1432 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1437 * figure out if these is a press or a release. We don't actually
1438 * care about repeats, as those will be auto-generated within the IR
1439 * subsystem for repeating scancodes.
1441 static int imon_parse_press_type(struct imon_context *ictx,
1442 unsigned char *buf, u8 ktype)
1445 unsigned long flags;
1447 spin_lock_irqsave(&ictx->kc_lock, flags);
1449 /* key release of 0x02XXXXXX key */
1450 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
1451 ictx->kc = ictx->last_keycode;
1453 /* mouse button release on (some) 0xffdc devices */
1454 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
1455 buf[2] == 0x81 && buf[3] == 0xb7)
1456 ictx->kc = ictx->last_keycode;
1458 /* mouse button release on (some other) 0xffdc devices */
1459 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
1460 buf[2] == 0x81 && buf[3] == 0xb7)
1461 ictx->kc = ictx->last_keycode;
1463 /* mce-specific button handling, no keyup events */
1464 else if (ktype == IMON_KEY_MCE) {
1465 ictx->rc_toggle = buf[2];
1468 /* incoherent or irrelevant data */
1469 } else if (ictx->kc == KEY_RESERVED)
1470 press_type = -EINVAL;
1472 /* key release of 0xXXXXXXb7 key */
1473 else if (ictx->release_code)
1476 /* this is a button press */
1480 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1486 * Process the incoming packet
1488 static void imon_incoming_packet(struct imon_context *ictx,
1489 struct urb *urb, int intf)
1491 int len = urb->actual_length;
1492 unsigned char *buf = urb->transfer_buffer;
1493 struct device *dev = ictx->dev;
1494 unsigned long flags;
1501 static struct timeval prev_time = { 0, 0 };
1504 /* filter out junk data on the older 0xffdc imon devices */
1505 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
1508 /* Figure out what key was pressed */
1509 if (len == 8 && buf[7] == 0xee) {
1510 scancode = be64_to_cpu(*((u64 *)buf));
1511 ktype = IMON_KEY_PANEL;
1512 kc = imon_panel_key_lookup(scancode);
1514 scancode = be32_to_cpu(*((u32 *)buf));
1515 if (ictx->rc_type == RC_BIT_RC6_MCE) {
1516 ktype = IMON_KEY_IMON;
1518 ktype = IMON_KEY_MCE;
1519 kc = imon_mce_key_lookup(ictx, scancode);
1521 ktype = IMON_KEY_IMON;
1522 kc = imon_remote_key_lookup(ictx, scancode);
1526 spin_lock_irqsave(&ictx->kc_lock, flags);
1527 /* keyboard/mouse mode toggle button */
1528 if (kc == KEY_KEYBOARD && !ictx->release_code) {
1529 ictx->last_keycode = kc;
1531 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
1532 dev_dbg(dev, "toggling to %s mode\n",
1533 ictx->pad_mouse ? "mouse" : "keyboard");
1534 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1537 ictx->pad_mouse = false;
1538 dev_dbg(dev, "mouse mode disabled, passing key value\n");
1543 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1545 /* send touchscreen events through input subsystem if touchpad data */
1546 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
1548 imon_touch_event(ictx, buf);
1551 /* look for mouse events with pad in mouse mode */
1552 } else if (ictx->pad_mouse) {
1553 if (imon_mouse_event(ictx, buf, len))
1557 /* Now for some special handling to convert pad input to arrow keys */
1558 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
1559 ((len == 8) && (buf[0] & 0x40) &&
1560 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
1562 imon_pad_to_keys(ictx, buf);
1566 printk(KERN_INFO "intf%d decoded packet: ", intf);
1567 for (i = 0; i < len; ++i)
1568 printk("%02x ", buf[i]);
1572 press_type = imon_parse_press_type(ictx, buf, ktype);
1574 goto not_input_data;
1576 spin_lock_irqsave(&ictx->kc_lock, flags);
1577 if (ictx->kc == KEY_UNKNOWN)
1579 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1581 if (ktype != IMON_KEY_PANEL) {
1582 if (press_type == 0)
1583 rc_keyup(ictx->rdev);
1585 rc_keydown(ictx->rdev, ictx->rc_scancode, ictx->rc_toggle);
1586 spin_lock_irqsave(&ictx->kc_lock, flags);
1587 ictx->last_keycode = ictx->kc;
1588 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1593 /* Only panel type events left to process now */
1594 spin_lock_irqsave(&ictx->kc_lock, flags);
1596 do_gettimeofday(&t);
1597 /* KEY_MUTE repeats from knob need to be suppressed */
1598 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
1599 msec = tv2int(&t, &prev_time);
1600 if (msec < ictx->idev->rep[REP_DELAY]) {
1601 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1608 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1610 input_report_key(ictx->idev, kc, press_type);
1611 input_sync(ictx->idev);
1613 /* panel keys don't generate a release */
1614 input_report_key(ictx->idev, kc, 0);
1615 input_sync(ictx->idev);
1617 spin_lock_irqsave(&ictx->kc_lock, flags);
1618 ictx->last_keycode = kc;
1619 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1624 spin_unlock_irqrestore(&ictx->kc_lock, flags);
1625 dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
1626 (long long)scancode);
1631 dev_warn(dev, "imon %s: invalid incoming packet "
1632 "size (len = %d, intf%d)\n", __func__, len, intf);
1636 /* iMON 2.4G associate frame */
1637 if (buf[0] == 0x00 &&
1638 buf[2] == 0xFF && /* REFID */
1641 buf[5] == 0xFF && /* iMON 2.4G */
1642 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
1643 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
1644 dev_warn(dev, "%s: remote associated refid=%02X\n",
1646 ictx->rf_isassociating = false;
1651 * Callback function for USB core API: receive data
1653 static void usb_rx_callback_intf0(struct urb *urb)
1655 struct imon_context *ictx;
1661 ictx = (struct imon_context *)urb->context;
1666 * if we get a callback before we're done configuring the hardware, we
1667 * can't yet process the data, as there's nowhere to send it, but we
1668 * still need to submit a new rx URB to avoid wedging the hardware
1670 if (!ictx->dev_present_intf0)
1673 switch (urb->status) {
1674 case -ENOENT: /* usbcore unlink successful! */
1677 case -ESHUTDOWN: /* transport endpoint was shut down */
1681 imon_incoming_packet(ictx, urb, intfnum);
1685 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1686 __func__, urb->status);
1691 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
1694 static void usb_rx_callback_intf1(struct urb *urb)
1696 struct imon_context *ictx;
1702 ictx = (struct imon_context *)urb->context;
1707 * if we get a callback before we're done configuring the hardware, we
1708 * can't yet process the data, as there's nowhere to send it, but we
1709 * still need to submit a new rx URB to avoid wedging the hardware
1711 if (!ictx->dev_present_intf1)
1714 switch (urb->status) {
1715 case -ENOENT: /* usbcore unlink successful! */
1718 case -ESHUTDOWN: /* transport endpoint was shut down */
1722 imon_incoming_packet(ictx, urb, intfnum);
1726 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
1727 __func__, urb->status);
1732 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
1736 * The 0x15c2:0xffdc device ID was used for umpteen different imon
1737 * devices, and all of them constantly spew interrupts, even when there
1738 * is no actual data to report. However, byte 6 of this buffer looks like
1739 * its unique across device variants, so we're trying to key off that to
1740 * figure out which display type (if any) and what IR protocol the device
1741 * actually supports. These devices have their IR protocol hard-coded into
1742 * their firmware, they can't be changed on the fly like the newer hardware.
1744 static void imon_get_ffdc_type(struct imon_context *ictx)
1746 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
1747 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
1748 u64 allowed_protos = RC_BIT_OTHER;
1750 switch (ffdc_cfg_byte) {
1751 /* iMON Knob, no display, iMON IR + vol knob */
1753 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
1754 ictx->display_supported = false;
1756 /* iMON 2.4G LT (usb stick), no display, iMON RF */
1758 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
1759 ictx->display_supported = false;
1760 ictx->rf_device = true;
1762 /* iMON VFD, no IR (does have vol knob tho) */
1764 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
1765 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1767 /* iMON VFD, iMON IR */
1770 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
1771 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1773 /* iMON VFD, MCE IR */
1777 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
1778 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1779 allowed_protos = RC_BIT_RC6_MCE;
1781 /* iMON LCD, MCE IR */
1783 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
1784 detected_display_type = IMON_DISPLAY_TYPE_LCD;
1785 allowed_protos = RC_BIT_RC6_MCE;
1788 dev_info(ictx->dev, "Unknown 0xffdc device, "
1789 "defaulting to VFD and iMON IR");
1790 detected_display_type = IMON_DISPLAY_TYPE_VFD;
1791 /* We don't know which one it is, allow user to set the
1792 * RC6 one from userspace if OTHER wasn't correct. */
1793 allowed_protos |= RC_BIT_RC6_MCE;
1797 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
1799 ictx->display_type = detected_display_type;
1800 ictx->rc_type = allowed_protos;
1803 static void imon_set_display_type(struct imon_context *ictx)
1805 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1808 * Try to auto-detect the type of display if the user hasn't set
1809 * it by hand via the display_type modparam. Default is VFD.
1812 if (display_type == IMON_DISPLAY_TYPE_AUTO) {
1813 switch (ictx->product) {
1815 /* set in imon_get_ffdc_type() */
1816 configured_display_type = ictx->display_type;
1820 configured_display_type = IMON_DISPLAY_TYPE_VGA;
1825 configured_display_type = IMON_DISPLAY_TYPE_LCD;
1831 configured_display_type = IMON_DISPLAY_TYPE_NONE;
1832 ictx->display_supported = false;
1837 configured_display_type = IMON_DISPLAY_TYPE_VFD;
1841 configured_display_type = display_type;
1842 if (display_type == IMON_DISPLAY_TYPE_NONE)
1843 ictx->display_supported = false;
1845 ictx->display_supported = true;
1846 dev_info(ictx->dev, "%s: overriding display type to %d via "
1847 "modparam\n", __func__, display_type);
1850 ictx->display_type = configured_display_type;
1853 static struct rc_dev *imon_init_rdev(struct imon_context *ictx)
1855 struct rc_dev *rdev;
1857 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
1858 0x00, 0x00, 0x00, 0x88 };
1860 rdev = rc_allocate_device();
1862 dev_err(ictx->dev, "remote control dev allocation failed\n");
1866 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
1867 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
1868 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
1869 sizeof(ictx->phys_rdev));
1870 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
1872 rdev->input_name = ictx->name_rdev;
1873 rdev->input_phys = ictx->phys_rdev;
1874 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
1875 rdev->dev.parent = ictx->dev;
1878 rdev->driver_type = RC_DRIVER_SCANCODE;
1879 rdev->allowed_protos = RC_BIT_OTHER | RC_BIT_RC6_MCE; /* iMON PAD or MCE */
1880 rdev->change_protocol = imon_ir_change_protocol;
1881 rdev->driver_name = MOD_NAME;
1883 /* Enable front-panel buttons and/or knobs */
1884 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
1885 ret = send_packet(ictx);
1886 /* Not fatal, but warn about it */
1888 dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
1890 if (ictx->product == 0xffdc) {
1891 imon_get_ffdc_type(ictx);
1892 rdev->allowed_protos = ictx->rc_type;
1895 imon_set_display_type(ictx);
1897 if (ictx->rc_type == RC_BIT_RC6_MCE)
1898 rdev->map_name = RC_MAP_IMON_MCE;
1900 rdev->map_name = RC_MAP_IMON_PAD;
1902 ret = rc_register_device(rdev);
1904 dev_err(ictx->dev, "remote input dev register failed\n");
1911 rc_free_device(rdev);
1915 static struct input_dev *imon_init_idev(struct imon_context *ictx)
1917 struct input_dev *idev;
1920 idev = input_allocate_device();
1922 dev_err(ictx->dev, "input dev allocation failed\n");
1926 snprintf(ictx->name_idev, sizeof(ictx->name_idev),
1927 "iMON Panel, Knob and Mouse(%04x:%04x)",
1928 ictx->vendor, ictx->product);
1929 idev->name = ictx->name_idev;
1931 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
1932 sizeof(ictx->phys_idev));
1933 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev));
1934 idev->phys = ictx->phys_idev;
1936 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
1938 idev->keybit[BIT_WORD(BTN_MOUSE)] =
1939 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1940 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
1941 BIT_MASK(REL_WHEEL);
1943 /* panel and/or knob code support */
1944 for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
1945 u32 kc = imon_panel_key_table[i].keycode;
1946 __set_bit(kc, idev->keybit);
1949 usb_to_input_id(ictx->usbdev_intf0, &idev->id);
1950 idev->dev.parent = ictx->dev;
1951 input_set_drvdata(idev, ictx);
1953 ret = input_register_device(idev);
1955 dev_err(ictx->dev, "input dev register failed\n");
1962 input_free_device(idev);
1966 static struct input_dev *imon_init_touch(struct imon_context *ictx)
1968 struct input_dev *touch;
1971 touch = input_allocate_device();
1973 dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
1974 goto touch_alloc_failed;
1977 snprintf(ictx->name_touch, sizeof(ictx->name_touch),
1978 "iMON USB Touchscreen (%04x:%04x)",
1979 ictx->vendor, ictx->product);
1980 touch->name = ictx->name_touch;
1982 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
1983 sizeof(ictx->phys_touch));
1984 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch));
1985 touch->phys = ictx->phys_touch;
1988 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1989 touch->keybit[BIT_WORD(BTN_TOUCH)] =
1990 BIT_MASK(BTN_TOUCH);
1991 input_set_abs_params(touch, ABS_X,
1993 input_set_abs_params(touch, ABS_Y,
1996 input_set_drvdata(touch, ictx);
1998 usb_to_input_id(ictx->usbdev_intf1, &touch->id);
1999 touch->dev.parent = ictx->dev;
2000 ret = input_register_device(touch);
2002 dev_info(ictx->dev, "touchscreen input dev register failed\n");
2003 goto touch_register_failed;
2008 touch_register_failed:
2009 input_free_device(touch);
2015 static bool imon_find_endpoints(struct imon_context *ictx,
2016 struct usb_host_interface *iface_desc)
2018 struct usb_endpoint_descriptor *ep;
2019 struct usb_endpoint_descriptor *rx_endpoint = NULL;
2020 struct usb_endpoint_descriptor *tx_endpoint = NULL;
2021 int ifnum = iface_desc->desc.bInterfaceNumber;
2022 int num_endpts = iface_desc->desc.bNumEndpoints;
2023 int i, ep_dir, ep_type;
2024 bool ir_ep_found = false;
2025 bool display_ep_found = false;
2026 bool tx_control = false;
2029 * Scan the endpoint list and set:
2030 * first input endpoint = IR endpoint
2031 * first output endpoint = display endpoint
2033 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
2034 ep = &iface_desc->endpoint[i].desc;
2035 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2036 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
2038 if (!ir_ep_found && ep_dir == USB_DIR_IN &&
2039 ep_type == USB_ENDPOINT_XFER_INT) {
2043 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__);
2045 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
2046 ep_type == USB_ENDPOINT_XFER_INT) {
2048 display_ep_found = true;
2049 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
2054 ictx->rx_endpoint_intf0 = rx_endpoint;
2056 * tx is used to send characters to lcd/vfd, associate RF
2057 * remotes, set IR protocol, and maybe more...
2059 ictx->tx_endpoint = tx_endpoint;
2061 ictx->rx_endpoint_intf1 = rx_endpoint;
2065 * If we didn't find a display endpoint, this is probably one of the
2066 * newer iMON devices that use control urb instead of interrupt
2068 if (!display_ep_found) {
2070 display_ep_found = true;
2071 dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
2072 "interface OUT endpoint\n", __func__);
2076 * Some iMON receivers have no display. Unfortunately, it seems
2077 * that SoundGraph recycles device IDs between devices both with
2080 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
2081 display_ep_found = false;
2082 dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
2086 * iMON Touch devices have a VGA touchscreen, but no "display", as
2087 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
2089 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2090 display_ep_found = false;
2091 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
2094 /* Input endpoint is mandatory */
2096 pr_err("no valid input (IR) endpoint found\n");
2098 ictx->tx_control = tx_control;
2100 if (display_ep_found)
2101 ictx->display_supported = true;
2107 static struct imon_context *imon_init_intf0(struct usb_interface *intf)
2109 struct imon_context *ictx;
2112 struct device *dev = &intf->dev;
2113 struct usb_host_interface *iface_desc;
2116 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
2118 dev_err(dev, "%s: kzalloc failed for context", __func__);
2121 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2123 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
2124 goto rx_urb_alloc_failed;
2126 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2128 dev_err(dev, "%s: usb_alloc_urb failed for display urb",
2130 goto tx_urb_alloc_failed;
2133 mutex_init(&ictx->lock);
2134 spin_lock_init(&ictx->kc_lock);
2136 mutex_lock(&ictx->lock);
2139 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
2140 ictx->rx_urb_intf0 = rx_urb;
2141 ictx->tx_urb = tx_urb;
2142 ictx->rf_device = false;
2144 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
2145 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
2148 iface_desc = intf->cur_altsetting;
2149 if (!imon_find_endpoints(ictx, iface_desc)) {
2150 goto find_endpoint_failed;
2153 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2154 usb_rcvintpipe(ictx->usbdev_intf0,
2155 ictx->rx_endpoint_intf0->bEndpointAddress),
2156 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2157 usb_rx_callback_intf0, ictx,
2158 ictx->rx_endpoint_intf0->bInterval);
2160 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
2162 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
2163 goto urb_submit_failed;
2166 ictx->idev = imon_init_idev(ictx);
2168 dev_err(dev, "%s: input device setup failed\n", __func__);
2169 goto idev_setup_failed;
2172 ictx->rdev = imon_init_rdev(ictx);
2174 dev_err(dev, "%s: rc device setup failed\n", __func__);
2175 goto rdev_setup_failed;
2178 ictx->dev_present_intf0 = true;
2180 mutex_unlock(&ictx->lock);
2184 input_unregister_device(ictx->idev);
2186 usb_kill_urb(ictx->rx_urb_intf0);
2188 find_endpoint_failed:
2189 mutex_unlock(&ictx->lock);
2190 usb_free_urb(tx_urb);
2191 tx_urb_alloc_failed:
2192 usb_free_urb(rx_urb);
2193 rx_urb_alloc_failed:
2196 dev_err(dev, "unable to initialize intf0, err %d\n", ret);
2201 static struct imon_context *imon_init_intf1(struct usb_interface *intf,
2202 struct imon_context *ictx)
2205 struct usb_host_interface *iface_desc;
2208 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2210 pr_err("usb_alloc_urb failed for IR urb\n");
2211 goto rx_urb_alloc_failed;
2214 mutex_lock(&ictx->lock);
2216 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2217 init_timer(&ictx->ttimer);
2218 ictx->ttimer.data = (unsigned long)ictx;
2219 ictx->ttimer.function = imon_touch_display_timeout;
2222 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
2223 ictx->rx_urb_intf1 = rx_urb;
2226 iface_desc = intf->cur_altsetting;
2227 if (!imon_find_endpoints(ictx, iface_desc))
2228 goto find_endpoint_failed;
2230 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2231 ictx->touch = imon_init_touch(ictx);
2233 goto touch_setup_failed;
2237 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2238 usb_rcvintpipe(ictx->usbdev_intf1,
2239 ictx->rx_endpoint_intf1->bEndpointAddress),
2240 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2241 usb_rx_callback_intf1, ictx,
2242 ictx->rx_endpoint_intf1->bInterval);
2244 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
2247 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
2248 goto urb_submit_failed;
2251 ictx->dev_present_intf1 = true;
2253 mutex_unlock(&ictx->lock);
2258 input_unregister_device(ictx->touch);
2260 find_endpoint_failed:
2261 mutex_unlock(&ictx->lock);
2262 usb_free_urb(rx_urb);
2263 rx_urb_alloc_failed:
2264 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
2269 static void imon_init_display(struct imon_context *ictx,
2270 struct usb_interface *intf)
2274 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
2276 /* set up sysfs entry for built-in clock */
2277 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group);
2279 dev_err(ictx->dev, "Could not create display sysfs "
2280 "entries(%d)", ret);
2282 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2283 ret = usb_register_dev(intf, &imon_lcd_class);
2285 ret = usb_register_dev(intf, &imon_vfd_class);
2287 /* Not a fatal error, so ignore */
2288 dev_info(ictx->dev, "could not get a minor number for "
2294 * Callback function for USB core API: Probe
2296 static int imon_probe(struct usb_interface *interface,
2297 const struct usb_device_id *id)
2299 struct usb_device *usbdev = NULL;
2300 struct usb_host_interface *iface_desc = NULL;
2301 struct usb_interface *first_if;
2302 struct device *dev = &interface->dev;
2303 int ifnum, sysfs_err;
2305 struct imon_context *ictx = NULL;
2306 struct imon_context *first_if_ctx = NULL;
2307 u16 vendor, product;
2309 usbdev = usb_get_dev(interface_to_usbdev(interface));
2310 iface_desc = interface->cur_altsetting;
2311 ifnum = iface_desc->desc.bInterfaceNumber;
2312 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
2313 product = le16_to_cpu(usbdev->descriptor.idProduct);
2315 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
2316 __func__, vendor, product, ifnum);
2318 /* prevent races probing devices w/multiple interfaces */
2319 mutex_lock(&driver_lock);
2321 first_if = usb_ifnum_to_if(usbdev, 0);
2322 first_if_ctx = usb_get_intfdata(first_if);
2325 ictx = imon_init_intf0(interface);
2327 pr_err("failed to initialize context!\n");
2333 /* this is the secondary interface on the device */
2334 ictx = imon_init_intf1(interface, first_if_ctx);
2336 pr_err("failed to attach to context!\n");
2343 /* default send_packet delay is 5ms but some devices need more */
2344 ictx->send_packet_delay = id->driver_info & IMON_NEED_20MS_PKT_DELAY ?
2347 usb_set_intfdata(interface, ictx);
2350 mutex_lock(&ictx->lock);
2352 if (product == 0xffdc && ictx->rf_device) {
2353 sysfs_err = sysfs_create_group(&interface->dev.kobj,
2354 &imon_rf_attr_group);
2356 pr_err("Could not create RF sysfs entries(%d)\n",
2360 if (ictx->display_supported)
2361 imon_init_display(ictx, interface);
2363 mutex_unlock(&ictx->lock);
2366 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
2367 "usb<%d:%d> initialized\n", vendor, product, ifnum,
2368 usbdev->bus->busnum, usbdev->devnum);
2370 mutex_unlock(&driver_lock);
2375 mutex_unlock(&driver_lock);
2376 dev_err(dev, "unable to register, err %d\n", ret);
2382 * Callback function for USB core API: disconnect
2384 static void imon_disconnect(struct usb_interface *interface)
2386 struct imon_context *ictx;
2390 /* prevent races with multi-interface device probing and display_open */
2391 mutex_lock(&driver_lock);
2393 ictx = usb_get_intfdata(interface);
2395 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
2398 * sysfs_remove_group is safe to call even if sysfs_create_group
2399 * hasn't been called
2401 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
2402 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
2404 usb_set_intfdata(interface, NULL);
2406 /* Abort ongoing write */
2407 if (ictx->tx.busy) {
2408 usb_kill_urb(ictx->tx_urb);
2409 complete_all(&ictx->tx.finished);
2413 ictx->dev_present_intf0 = false;
2414 usb_kill_urb(ictx->rx_urb_intf0);
2415 input_unregister_device(ictx->idev);
2416 rc_unregister_device(ictx->rdev);
2417 if (ictx->display_supported) {
2418 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
2419 usb_deregister_dev(interface, &imon_lcd_class);
2420 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
2421 usb_deregister_dev(interface, &imon_vfd_class);
2424 ictx->dev_present_intf1 = false;
2425 usb_kill_urb(ictx->rx_urb_intf1);
2426 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
2427 input_unregister_device(ictx->touch);
2428 del_timer_sync(&ictx->ttimer);
2432 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1)
2433 free_imon_context(ictx);
2435 mutex_unlock(&driver_lock);
2437 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
2441 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
2443 struct imon_context *ictx = usb_get_intfdata(intf);
2444 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2447 usb_kill_urb(ictx->rx_urb_intf0);
2449 usb_kill_urb(ictx->rx_urb_intf1);
2454 static int imon_resume(struct usb_interface *intf)
2457 struct imon_context *ictx = usb_get_intfdata(intf);
2458 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
2461 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
2462 usb_rcvintpipe(ictx->usbdev_intf0,
2463 ictx->rx_endpoint_intf0->bEndpointAddress),
2464 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2465 usb_rx_callback_intf0, ictx,
2466 ictx->rx_endpoint_intf0->bInterval);
2468 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
2471 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
2472 usb_rcvintpipe(ictx->usbdev_intf1,
2473 ictx->rx_endpoint_intf1->bEndpointAddress),
2474 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
2475 usb_rx_callback_intf1, ictx,
2476 ictx->rx_endpoint_intf1->bInterval);
2478 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
2484 module_usb_driver(imon_driver);