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