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 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 30 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> 38 39 #include <linux/input.h> 40 #include <linux/usb.h> 41 #include <linux/usb/input.h> 42 #include <media/rc-core.h> 43 44 #include <linux/time.h> 45 #include <linux/timer.h> 46 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" 51 52 #define DISPLAY_MINOR_BASE 144 53 #define DEVICE_NAME "lcd%d" 54 55 #define BUF_CHUNK_SIZE 8 56 #define BUF_SIZE 128 57 58 #define BIT_DURATION 250 /* each bit received is 250us */ 59 60 #define IMON_CLOCK_ENABLE_PACKETS 2 61 62 /*** P R O T O T Y P E S ***/ 63 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); 71 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); 75 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); 79 80 /* VFD write operation */ 81 static ssize_t vfd_write(struct file *file, const char __user *buf, 82 size_t n_bytes, loff_t *pos); 83 84 /* LCD file_operations override function prototypes */ 85 static ssize_t lcd_write(struct file *file, const char __user *buf, 86 size_t n_bytes, loff_t *pos); 87 88 /*** G L O B A L S ***/ 89 90 struct imon_panel_key_table { 91 u64 hw_code; 92 u32 keycode; 93 }; 94 95 struct imon_usb_dev_descr { 96 __u16 flags; 97 #define IMON_NO_FLAGS 0 98 #define IMON_NEED_20MS_PKT_DELAY 1 99 struct imon_panel_key_table key_table[]; 100 }; 101 102 struct imon_context { 103 struct device *dev; 104 /* Newer devices have two interfaces */ 105 struct usb_device *usbdev_intf0; 106 struct usb_device *usbdev_intf1; 107 108 bool display_supported; /* not all controllers do */ 109 bool display_isopen; /* display port has been opened */ 110 bool rf_device; /* true if iMON 2.4G LT/DT RF device */ 111 bool rf_isassociating; /* RF remote associating */ 112 bool dev_present_intf0; /* USB device presence, interface 0 */ 113 bool dev_present_intf1; /* USB device presence, interface 1 */ 114 115 struct mutex lock; /* to lock this object */ 116 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */ 117 118 struct usb_endpoint_descriptor *rx_endpoint_intf0; 119 struct usb_endpoint_descriptor *rx_endpoint_intf1; 120 struct usb_endpoint_descriptor *tx_endpoint; 121 struct urb *rx_urb_intf0; 122 struct urb *rx_urb_intf1; 123 struct urb *tx_urb; 124 bool tx_control; 125 unsigned char usb_rx_buf[8]; 126 unsigned char usb_tx_buf[8]; 127 unsigned int send_packet_delay; 128 129 struct tx_t { 130 unsigned char data_buf[35]; /* user data buffer */ 131 struct completion finished; /* wait for write to finish */ 132 bool busy; /* write in progress */ 133 int status; /* status of tx completion */ 134 } tx; 135 136 u16 vendor; /* usb vendor ID */ 137 u16 product; /* usb product ID */ 138 139 struct rc_dev *rdev; /* rc-core device for remote */ 140 struct input_dev *idev; /* input device for panel & IR mouse */ 141 struct input_dev *touch; /* input device for touchscreen */ 142 143 spinlock_t kc_lock; /* make sure we get keycodes right */ 144 u32 kc; /* current input keycode */ 145 u32 last_keycode; /* last reported input keycode */ 146 u32 rc_scancode; /* the computed remote scancode */ 147 u8 rc_toggle; /* the computed remote toggle bit */ 148 u64 rc_type; /* iMON or MCE (RC6) IR protocol? */ 149 bool release_code; /* some keys send a release code */ 150 151 u8 display_type; /* store the display type */ 152 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */ 153 154 char name_rdev[128]; /* rc input device name */ 155 char phys_rdev[64]; /* rc input device phys path */ 156 157 char name_idev[128]; /* input device name */ 158 char phys_idev[64]; /* input device phys path */ 159 160 char name_touch[128]; /* touch screen name */ 161 char phys_touch[64]; /* touch screen phys path */ 162 struct timer_list ttimer; /* touch screen timer */ 163 int touch_x; /* x coordinate on touchscreen */ 164 int touch_y; /* y coordinate on touchscreen */ 165 struct imon_usb_dev_descr *dev_descr; /* device description with key 166 table for front panels */ 167 }; 168 169 #define TOUCH_TIMEOUT (HZ/30) 170 171 /* vfd character device file operations */ 172 static const struct file_operations vfd_fops = { 173 .owner = THIS_MODULE, 174 .open = &display_open, 175 .write = &vfd_write, 176 .release = &display_close, 177 .llseek = noop_llseek, 178 }; 179 180 /* lcd character device file operations */ 181 static const struct file_operations lcd_fops = { 182 .owner = THIS_MODULE, 183 .open = &display_open, 184 .write = &lcd_write, 185 .release = &display_close, 186 .llseek = noop_llseek, 187 }; 188 189 enum { 190 IMON_DISPLAY_TYPE_AUTO = 0, 191 IMON_DISPLAY_TYPE_VFD = 1, 192 IMON_DISPLAY_TYPE_LCD = 2, 193 IMON_DISPLAY_TYPE_VGA = 3, 194 IMON_DISPLAY_TYPE_NONE = 4, 195 }; 196 197 enum { 198 IMON_KEY_IMON = 0, 199 IMON_KEY_MCE = 1, 200 IMON_KEY_PANEL = 2, 201 }; 202 203 static struct usb_class_driver imon_vfd_class = { 204 .name = DEVICE_NAME, 205 .fops = &vfd_fops, 206 .minor_base = DISPLAY_MINOR_BASE, 207 }; 208 209 static struct usb_class_driver imon_lcd_class = { 210 .name = DEVICE_NAME, 211 .fops = &lcd_fops, 212 .minor_base = DISPLAY_MINOR_BASE, 213 }; 214 215 /* imon receiver front panel/knob key table */ 216 static const struct imon_usb_dev_descr imon_default_table = { 217 .flags = IMON_NO_FLAGS, 218 .key_table = { 219 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 220 { 0x000000001200ffeell, KEY_UP }, 221 { 0x000000001300ffeell, KEY_DOWN }, 222 { 0x000000001400ffeell, KEY_LEFT }, 223 { 0x000000001500ffeell, KEY_RIGHT }, 224 { 0x000000001600ffeell, KEY_ENTER }, 225 { 0x000000001700ffeell, KEY_ESC }, 226 { 0x000000001f00ffeell, KEY_AUDIO }, 227 { 0x000000002000ffeell, KEY_VIDEO }, 228 { 0x000000002100ffeell, KEY_CAMERA }, 229 { 0x000000002700ffeell, KEY_DVD }, 230 { 0x000000002300ffeell, KEY_TV }, 231 { 0x000000002b00ffeell, KEY_EXIT }, 232 { 0x000000002c00ffeell, KEY_SELECT }, 233 { 0x000000002d00ffeell, KEY_MENU }, 234 { 0x000000000500ffeell, KEY_PREVIOUS }, 235 { 0x000000000700ffeell, KEY_REWIND }, 236 { 0x000000000400ffeell, KEY_STOP }, 237 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 238 { 0x000000000800ffeell, KEY_FASTFORWARD }, 239 { 0x000000000600ffeell, KEY_NEXT }, 240 { 0x000000010000ffeell, KEY_RIGHT }, 241 { 0x000001000000ffeell, KEY_LEFT }, 242 { 0x000000003d00ffeell, KEY_SELECT }, 243 { 0x000100000000ffeell, KEY_VOLUMEUP }, 244 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 245 { 0x000000000100ffeell, KEY_MUTE }, 246 /* 0xffdc iMON MCE VFD */ 247 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 248 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 249 { 0x00000001ffffffeell, KEY_MUTE }, 250 { 0x0000000fffffffeell, KEY_MEDIA }, 251 { 0x00000012ffffffeell, KEY_UP }, 252 { 0x00000013ffffffeell, KEY_DOWN }, 253 { 0x00000014ffffffeell, KEY_LEFT }, 254 { 0x00000015ffffffeell, KEY_RIGHT }, 255 { 0x00000016ffffffeell, KEY_ENTER }, 256 { 0x00000017ffffffeell, KEY_ESC }, 257 /* iMON Knob values */ 258 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 259 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 260 { 0x000008ffffffffeell, KEY_MUTE }, 261 { 0, KEY_RESERVED }, 262 } 263 }; 264 265 static const struct imon_usb_dev_descr imon_OEM_VFD = { 266 .flags = IMON_NEED_20MS_PKT_DELAY, 267 .key_table = { 268 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 269 { 0x000000001200ffeell, KEY_UP }, 270 { 0x000000001300ffeell, KEY_DOWN }, 271 { 0x000000001400ffeell, KEY_LEFT }, 272 { 0x000000001500ffeell, KEY_RIGHT }, 273 { 0x000000001600ffeell, KEY_ENTER }, 274 { 0x000000001700ffeell, KEY_ESC }, 275 { 0x000000001f00ffeell, KEY_AUDIO }, 276 { 0x000000002b00ffeell, KEY_EXIT }, 277 { 0x000000002c00ffeell, KEY_SELECT }, 278 { 0x000000002d00ffeell, KEY_MENU }, 279 { 0x000000000500ffeell, KEY_PREVIOUS }, 280 { 0x000000000700ffeell, KEY_REWIND }, 281 { 0x000000000400ffeell, KEY_STOP }, 282 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 283 { 0x000000000800ffeell, KEY_FASTFORWARD }, 284 { 0x000000000600ffeell, KEY_NEXT }, 285 { 0x000000010000ffeell, KEY_RIGHT }, 286 { 0x000001000000ffeell, KEY_LEFT }, 287 { 0x000000003d00ffeell, KEY_SELECT }, 288 { 0x000100000000ffeell, KEY_VOLUMEUP }, 289 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 290 { 0x000000000100ffeell, KEY_MUTE }, 291 /* 0xffdc iMON MCE VFD */ 292 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 293 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 294 { 0x00000001ffffffeell, KEY_MUTE }, 295 { 0x0000000fffffffeell, KEY_MEDIA }, 296 { 0x00000012ffffffeell, KEY_UP }, 297 { 0x00000013ffffffeell, KEY_DOWN }, 298 { 0x00000014ffffffeell, KEY_LEFT }, 299 { 0x00000015ffffffeell, KEY_RIGHT }, 300 { 0x00000016ffffffeell, KEY_ENTER }, 301 { 0x00000017ffffffeell, KEY_ESC }, 302 /* iMON Knob values */ 303 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 304 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 305 { 0x000008ffffffffeell, KEY_MUTE }, 306 { 0, KEY_RESERVED }, 307 } 308 }; 309 310 /* imon receiver front panel/knob key table for DH102*/ 311 static const struct imon_usb_dev_descr imon_DH102 = { 312 .flags = IMON_NO_FLAGS, 313 .key_table = { 314 { 0x000100000000ffeell, KEY_VOLUMEUP }, 315 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 316 { 0x000000010000ffeell, KEY_MUTE }, 317 { 0x0000000f0000ffeell, KEY_MEDIA }, 318 { 0x000000120000ffeell, KEY_UP }, 319 { 0x000000130000ffeell, KEY_DOWN }, 320 { 0x000000140000ffeell, KEY_LEFT }, 321 { 0x000000150000ffeell, KEY_RIGHT }, 322 { 0x000000160000ffeell, KEY_ENTER }, 323 { 0x000000170000ffeell, KEY_ESC }, 324 { 0x0000002b0000ffeell, KEY_EXIT }, 325 { 0x0000002c0000ffeell, KEY_SELECT }, 326 { 0x0000002d0000ffeell, KEY_MENU }, 327 { 0, KEY_RESERVED } 328 } 329 }; 330 331 /* 332 * USB Device ID for iMON USB Control Boards 333 * 334 * The Windows drivers contain 6 different inf files, more or less one for 335 * each new device until the 0x0034-0x0046 devices, which all use the same 336 * driver. Some of the devices in the 34-46 range haven't been definitively 337 * identified yet. Early devices have either a TriGem Computer, Inc. or a 338 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later 339 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports 340 * the ffdc and later devices, which do onboard decoding. 341 */ 342 static struct usb_device_id imon_usb_id_table[] = { 343 /* 344 * Several devices with this same device ID, all use iMON_PAD.inf 345 * SoundGraph iMON PAD (IR & VFD) 346 * SoundGraph iMON PAD (IR & LCD) 347 * SoundGraph iMON Knob (IR only) 348 */ 349 { USB_DEVICE(0x15c2, 0xffdc), 350 .driver_info = (unsigned long)&imon_default_table }, 351 352 /* 353 * Newer devices, all driven by the latest iMON Windows driver, full 354 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2' 355 * Need user input to fill in details on unknown devices. 356 */ 357 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */ 358 { USB_DEVICE(0x15c2, 0x0034), 359 .driver_info = (unsigned long)&imon_DH102 }, 360 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */ 361 { USB_DEVICE(0x15c2, 0x0035), 362 .driver_info = (unsigned long)&imon_default_table}, 363 /* SoundGraph iMON OEM VFD (IR & VFD) */ 364 { USB_DEVICE(0x15c2, 0x0036), 365 .driver_info = (unsigned long)&imon_OEM_VFD }, 366 /* device specifics unknown */ 367 { USB_DEVICE(0x15c2, 0x0037), 368 .driver_info = (unsigned long)&imon_default_table}, 369 /* SoundGraph iMON OEM LCD (IR & LCD) */ 370 { USB_DEVICE(0x15c2, 0x0038), 371 .driver_info = (unsigned long)&imon_default_table}, 372 /* SoundGraph iMON UltraBay (IR & LCD) */ 373 { USB_DEVICE(0x15c2, 0x0039), 374 .driver_info = (unsigned long)&imon_default_table}, 375 /* device specifics unknown */ 376 { USB_DEVICE(0x15c2, 0x003a), 377 .driver_info = (unsigned long)&imon_default_table}, 378 /* device specifics unknown */ 379 { USB_DEVICE(0x15c2, 0x003b), 380 .driver_info = (unsigned long)&imon_default_table}, 381 /* SoundGraph iMON OEM Inside (IR only) */ 382 { USB_DEVICE(0x15c2, 0x003c), 383 .driver_info = (unsigned long)&imon_default_table}, 384 /* device specifics unknown */ 385 { USB_DEVICE(0x15c2, 0x003d), 386 .driver_info = (unsigned long)&imon_default_table}, 387 /* device specifics unknown */ 388 { USB_DEVICE(0x15c2, 0x003e), 389 .driver_info = (unsigned long)&imon_default_table}, 390 /* device specifics unknown */ 391 { USB_DEVICE(0x15c2, 0x003f), 392 .driver_info = (unsigned long)&imon_default_table}, 393 /* device specifics unknown */ 394 { USB_DEVICE(0x15c2, 0x0040), 395 .driver_info = (unsigned long)&imon_default_table}, 396 /* SoundGraph iMON MINI (IR only) */ 397 { USB_DEVICE(0x15c2, 0x0041), 398 .driver_info = (unsigned long)&imon_default_table}, 399 /* Antec Veris Multimedia Station EZ External (IR only) */ 400 { USB_DEVICE(0x15c2, 0x0042), 401 .driver_info = (unsigned long)&imon_default_table}, 402 /* Antec Veris Multimedia Station Basic Internal (IR only) */ 403 { USB_DEVICE(0x15c2, 0x0043), 404 .driver_info = (unsigned long)&imon_default_table}, 405 /* Antec Veris Multimedia Station Elite (IR & VFD) */ 406 { USB_DEVICE(0x15c2, 0x0044), 407 .driver_info = (unsigned long)&imon_default_table}, 408 /* Antec Veris Multimedia Station Premiere (IR & LCD) */ 409 { USB_DEVICE(0x15c2, 0x0045), 410 .driver_info = (unsigned long)&imon_default_table}, 411 /* device specifics unknown */ 412 { USB_DEVICE(0x15c2, 0x0046), 413 .driver_info = (unsigned long)&imon_default_table}, 414 {} 415 }; 416 417 /* USB Device data */ 418 static struct usb_driver imon_driver = { 419 .name = MOD_NAME, 420 .probe = imon_probe, 421 .disconnect = imon_disconnect, 422 .suspend = imon_suspend, 423 .resume = imon_resume, 424 .id_table = imon_usb_id_table, 425 }; 426 427 /* to prevent races between open() and disconnect(), probing, etc */ 428 static DEFINE_MUTEX(driver_lock); 429 430 /* Module bookkeeping bits */ 431 MODULE_AUTHOR(MOD_AUTHOR); 432 MODULE_DESCRIPTION(MOD_DESC); 433 MODULE_VERSION(MOD_VERSION); 434 MODULE_LICENSE("GPL"); 435 MODULE_DEVICE_TABLE(usb, imon_usb_id_table); 436 437 static bool debug; 438 module_param(debug, bool, S_IRUGO | S_IWUSR); 439 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)"); 440 441 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */ 442 static int display_type; 443 module_param(display_type, int, S_IRUGO); 444 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, " 445 "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)"); 446 447 static int pad_stabilize = 1; 448 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR); 449 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD " 450 "presses in arrow key mode. 0=disable, 1=enable (default)."); 451 452 /* 453 * In certain use cases, mouse mode isn't really helpful, and could actually 454 * cause confusion, so allow disabling it when the IR device is open. 455 */ 456 static bool nomouse; 457 module_param(nomouse, bool, S_IRUGO | S_IWUSR); 458 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is " 459 "open. 0=don't disable, 1=disable. (default: don't disable)"); 460 461 /* threshold at which a pad push registers as an arrow key in kbd mode */ 462 static int pad_thresh; 463 module_param(pad_thresh, int, S_IRUGO | S_IWUSR); 464 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an " 465 "arrow key in kbd mode (default: 28)"); 466 467 468 static void free_imon_context(struct imon_context *ictx) 469 { 470 struct device *dev = ictx->dev; 471 472 usb_free_urb(ictx->tx_urb); 473 usb_free_urb(ictx->rx_urb_intf0); 474 usb_free_urb(ictx->rx_urb_intf1); 475 kfree(ictx); 476 477 dev_dbg(dev, "%s: iMON context freed\n", __func__); 478 } 479 480 /** 481 * Called when the Display device (e.g. /dev/lcd0) 482 * is opened by the application. 483 */ 484 static int display_open(struct inode *inode, struct file *file) 485 { 486 struct usb_interface *interface; 487 struct imon_context *ictx = NULL; 488 int subminor; 489 int retval = 0; 490 491 /* prevent races with disconnect */ 492 mutex_lock(&driver_lock); 493 494 subminor = iminor(inode); 495 interface = usb_find_interface(&imon_driver, subminor); 496 if (!interface) { 497 pr_err("could not find interface for minor %d\n", subminor); 498 retval = -ENODEV; 499 goto exit; 500 } 501 ictx = usb_get_intfdata(interface); 502 503 if (!ictx) { 504 pr_err("no context found for minor %d\n", subminor); 505 retval = -ENODEV; 506 goto exit; 507 } 508 509 mutex_lock(&ictx->lock); 510 511 if (!ictx->display_supported) { 512 pr_err("display not supported by device\n"); 513 retval = -ENODEV; 514 } else if (ictx->display_isopen) { 515 pr_err("display port is already open\n"); 516 retval = -EBUSY; 517 } else { 518 ictx->display_isopen = true; 519 file->private_data = ictx; 520 dev_dbg(ictx->dev, "display port opened\n"); 521 } 522 523 mutex_unlock(&ictx->lock); 524 525 exit: 526 mutex_unlock(&driver_lock); 527 return retval; 528 } 529 530 /** 531 * Called when the display device (e.g. /dev/lcd0) 532 * is closed by the application. 533 */ 534 static int display_close(struct inode *inode, struct file *file) 535 { 536 struct imon_context *ictx = NULL; 537 int retval = 0; 538 539 ictx = file->private_data; 540 541 if (!ictx) { 542 pr_err("no context for device\n"); 543 return -ENODEV; 544 } 545 546 mutex_lock(&ictx->lock); 547 548 if (!ictx->display_supported) { 549 pr_err("display not supported by device\n"); 550 retval = -ENODEV; 551 } else if (!ictx->display_isopen) { 552 pr_err("display is not open\n"); 553 retval = -EIO; 554 } else { 555 ictx->display_isopen = false; 556 dev_dbg(ictx->dev, "display port closed\n"); 557 } 558 559 mutex_unlock(&ictx->lock); 560 return retval; 561 } 562 563 /** 564 * Sends a packet to the device -- this function must be called with 565 * ictx->lock held, or its unlock/lock sequence while waiting for tx 566 * to complete can/will lead to a deadlock. 567 */ 568 static int send_packet(struct imon_context *ictx) 569 { 570 unsigned int pipe; 571 unsigned long timeout; 572 int interval = 0; 573 int retval = 0; 574 struct usb_ctrlrequest *control_req = NULL; 575 576 /* Check if we need to use control or interrupt urb */ 577 if (!ictx->tx_control) { 578 pipe = usb_sndintpipe(ictx->usbdev_intf0, 579 ictx->tx_endpoint->bEndpointAddress); 580 interval = ictx->tx_endpoint->bInterval; 581 582 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe, 583 ictx->usb_tx_buf, 584 sizeof(ictx->usb_tx_buf), 585 usb_tx_callback, ictx, interval); 586 587 ictx->tx_urb->actual_length = 0; 588 } else { 589 /* fill request into kmalloc'ed space: */ 590 control_req = kmalloc(sizeof(struct usb_ctrlrequest), 591 GFP_KERNEL); 592 if (control_req == NULL) 593 return -ENOMEM; 594 595 /* setup packet is '21 09 0200 0001 0008' */ 596 control_req->bRequestType = 0x21; 597 control_req->bRequest = 0x09; 598 control_req->wValue = cpu_to_le16(0x0200); 599 control_req->wIndex = cpu_to_le16(0x0001); 600 control_req->wLength = cpu_to_le16(0x0008); 601 602 /* control pipe is endpoint 0x00 */ 603 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0); 604 605 /* build the control urb */ 606 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0, 607 pipe, (unsigned char *)control_req, 608 ictx->usb_tx_buf, 609 sizeof(ictx->usb_tx_buf), 610 usb_tx_callback, ictx); 611 ictx->tx_urb->actual_length = 0; 612 } 613 614 init_completion(&ictx->tx.finished); 615 ictx->tx.busy = true; 616 smp_rmb(); /* ensure later readers know we're busy */ 617 618 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL); 619 if (retval) { 620 ictx->tx.busy = false; 621 smp_rmb(); /* ensure later readers know we're not busy */ 622 pr_err_ratelimited("error submitting urb(%d)\n", retval); 623 } else { 624 /* Wait for transmission to complete (or abort) */ 625 mutex_unlock(&ictx->lock); 626 retval = wait_for_completion_interruptible( 627 &ictx->tx.finished); 628 if (retval) { 629 usb_kill_urb(ictx->tx_urb); 630 pr_err_ratelimited("task interrupted\n"); 631 } 632 mutex_lock(&ictx->lock); 633 634 retval = ictx->tx.status; 635 if (retval) 636 pr_err_ratelimited("packet tx failed (%d)\n", retval); 637 } 638 639 kfree(control_req); 640 641 /* 642 * Induce a mandatory delay before returning, as otherwise, 643 * send_packet can get called so rapidly as to overwhelm the device, 644 * particularly on faster systems and/or those with quirky usb. 645 */ 646 timeout = msecs_to_jiffies(ictx->send_packet_delay); 647 set_current_state(TASK_INTERRUPTIBLE); 648 schedule_timeout(timeout); 649 650 return retval; 651 } 652 653 /** 654 * Sends an associate packet to the iMON 2.4G. 655 * 656 * This might not be such a good idea, since it has an id collision with 657 * some versions of the "IR & VFD" combo. The only way to determine if it 658 * is an RF version is to look at the product description string. (Which 659 * we currently do not fetch). 660 */ 661 static int send_associate_24g(struct imon_context *ictx) 662 { 663 int retval; 664 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00, 665 0x00, 0x00, 0x00, 0x20 }; 666 667 if (!ictx) { 668 pr_err("no context for device\n"); 669 return -ENODEV; 670 } 671 672 if (!ictx->dev_present_intf0) { 673 pr_err("no iMON device present\n"); 674 return -ENODEV; 675 } 676 677 memcpy(ictx->usb_tx_buf, packet, sizeof(packet)); 678 retval = send_packet(ictx); 679 680 return retval; 681 } 682 683 /** 684 * Sends packets to setup and show clock on iMON display 685 * 686 * Arguments: year - last 2 digits of year, month - 1..12, 687 * day - 1..31, dow - day of the week (0-Sun...6-Sat), 688 * hour - 0..23, minute - 0..59, second - 0..59 689 */ 690 static int send_set_imon_clock(struct imon_context *ictx, 691 unsigned int year, unsigned int month, 692 unsigned int day, unsigned int dow, 693 unsigned int hour, unsigned int minute, 694 unsigned int second) 695 { 696 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8]; 697 int retval = 0; 698 int i; 699 700 if (!ictx) { 701 pr_err("no context for device\n"); 702 return -ENODEV; 703 } 704 705 switch (ictx->display_type) { 706 case IMON_DISPLAY_TYPE_LCD: 707 clock_enable_pkt[0][0] = 0x80; 708 clock_enable_pkt[0][1] = year; 709 clock_enable_pkt[0][2] = month-1; 710 clock_enable_pkt[0][3] = day; 711 clock_enable_pkt[0][4] = hour; 712 clock_enable_pkt[0][5] = minute; 713 clock_enable_pkt[0][6] = second; 714 715 clock_enable_pkt[1][0] = 0x80; 716 clock_enable_pkt[1][1] = 0; 717 clock_enable_pkt[1][2] = 0; 718 clock_enable_pkt[1][3] = 0; 719 clock_enable_pkt[1][4] = 0; 720 clock_enable_pkt[1][5] = 0; 721 clock_enable_pkt[1][6] = 0; 722 723 if (ictx->product == 0xffdc) { 724 clock_enable_pkt[0][7] = 0x50; 725 clock_enable_pkt[1][7] = 0x51; 726 } else { 727 clock_enable_pkt[0][7] = 0x88; 728 clock_enable_pkt[1][7] = 0x8a; 729 } 730 731 break; 732 733 case IMON_DISPLAY_TYPE_VFD: 734 clock_enable_pkt[0][0] = year; 735 clock_enable_pkt[0][1] = month-1; 736 clock_enable_pkt[0][2] = day; 737 clock_enable_pkt[0][3] = dow; 738 clock_enable_pkt[0][4] = hour; 739 clock_enable_pkt[0][5] = minute; 740 clock_enable_pkt[0][6] = second; 741 clock_enable_pkt[0][7] = 0x40; 742 743 clock_enable_pkt[1][0] = 0; 744 clock_enable_pkt[1][1] = 0; 745 clock_enable_pkt[1][2] = 1; 746 clock_enable_pkt[1][3] = 0; 747 clock_enable_pkt[1][4] = 0; 748 clock_enable_pkt[1][5] = 0; 749 clock_enable_pkt[1][6] = 0; 750 clock_enable_pkt[1][7] = 0x42; 751 752 break; 753 754 default: 755 return -ENODEV; 756 } 757 758 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) { 759 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8); 760 retval = send_packet(ictx); 761 if (retval) { 762 pr_err("send_packet failed for packet %d\n", i); 763 break; 764 } 765 } 766 767 return retval; 768 } 769 770 /** 771 * These are the sysfs functions to handle the association on the iMON 2.4G LT. 772 */ 773 static ssize_t show_associate_remote(struct device *d, 774 struct device_attribute *attr, 775 char *buf) 776 { 777 struct imon_context *ictx = dev_get_drvdata(d); 778 779 if (!ictx) 780 return -ENODEV; 781 782 mutex_lock(&ictx->lock); 783 if (ictx->rf_isassociating) 784 strcpy(buf, "associating\n"); 785 else 786 strcpy(buf, "closed\n"); 787 788 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for " 789 "instructions on how to associate your iMON 2.4G DT/LT " 790 "remote\n"); 791 mutex_unlock(&ictx->lock); 792 return strlen(buf); 793 } 794 795 static ssize_t store_associate_remote(struct device *d, 796 struct device_attribute *attr, 797 const char *buf, size_t count) 798 { 799 struct imon_context *ictx; 800 801 ictx = dev_get_drvdata(d); 802 803 if (!ictx) 804 return -ENODEV; 805 806 mutex_lock(&ictx->lock); 807 ictx->rf_isassociating = true; 808 send_associate_24g(ictx); 809 mutex_unlock(&ictx->lock); 810 811 return count; 812 } 813 814 /** 815 * sysfs functions to control internal imon clock 816 */ 817 static ssize_t show_imon_clock(struct device *d, 818 struct device_attribute *attr, char *buf) 819 { 820 struct imon_context *ictx = dev_get_drvdata(d); 821 size_t len; 822 823 if (!ictx) 824 return -ENODEV; 825 826 mutex_lock(&ictx->lock); 827 828 if (!ictx->display_supported) { 829 len = snprintf(buf, PAGE_SIZE, "Not supported."); 830 } else { 831 len = snprintf(buf, PAGE_SIZE, 832 "To set the clock on your iMON display:\n" 833 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n" 834 "%s", ictx->display_isopen ? 835 "\nNOTE: imon device must be closed\n" : ""); 836 } 837 838 mutex_unlock(&ictx->lock); 839 840 return len; 841 } 842 843 static ssize_t store_imon_clock(struct device *d, 844 struct device_attribute *attr, 845 const char *buf, size_t count) 846 { 847 struct imon_context *ictx = dev_get_drvdata(d); 848 ssize_t retval; 849 unsigned int year, month, day, dow, hour, minute, second; 850 851 if (!ictx) 852 return -ENODEV; 853 854 mutex_lock(&ictx->lock); 855 856 if (!ictx->display_supported) { 857 retval = -ENODEV; 858 goto exit; 859 } else if (ictx->display_isopen) { 860 retval = -EBUSY; 861 goto exit; 862 } 863 864 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow, 865 &hour, &minute, &second) != 7) { 866 retval = -EINVAL; 867 goto exit; 868 } 869 870 if ((month < 1 || month > 12) || 871 (day < 1 || day > 31) || (dow > 6) || 872 (hour > 23) || (minute > 59) || (second > 59)) { 873 retval = -EINVAL; 874 goto exit; 875 } 876 877 retval = send_set_imon_clock(ictx, year, month, day, dow, 878 hour, minute, second); 879 if (retval) 880 goto exit; 881 882 retval = count; 883 exit: 884 mutex_unlock(&ictx->lock); 885 886 return retval; 887 } 888 889 890 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock, 891 store_imon_clock); 892 893 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote, 894 store_associate_remote); 895 896 static struct attribute *imon_display_sysfs_entries[] = { 897 &dev_attr_imon_clock.attr, 898 NULL 899 }; 900 901 static struct attribute_group imon_display_attr_group = { 902 .attrs = imon_display_sysfs_entries 903 }; 904 905 static struct attribute *imon_rf_sysfs_entries[] = { 906 &dev_attr_associate_remote.attr, 907 NULL 908 }; 909 910 static struct attribute_group imon_rf_attr_group = { 911 .attrs = imon_rf_sysfs_entries 912 }; 913 914 /** 915 * Writes data to the VFD. The iMON VFD is 2x16 characters 916 * and requires data in 5 consecutive USB interrupt packets, 917 * each packet but the last carrying 7 bytes. 918 * 919 * I don't know if the VFD board supports features such as 920 * scrolling, clearing rows, blanking, etc. so at 921 * the caller must provide a full screen of data. If fewer 922 * than 32 bytes are provided spaces will be appended to 923 * generate a full screen. 924 */ 925 static ssize_t vfd_write(struct file *file, const char __user *buf, 926 size_t n_bytes, loff_t *pos) 927 { 928 int i; 929 int offset; 930 int seq; 931 int retval = 0; 932 struct imon_context *ictx; 933 const unsigned char vfd_packet6[] = { 934 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; 935 936 ictx = file->private_data; 937 if (!ictx) { 938 pr_err_ratelimited("no context for device\n"); 939 return -ENODEV; 940 } 941 942 mutex_lock(&ictx->lock); 943 944 if (!ictx->dev_present_intf0) { 945 pr_err_ratelimited("no iMON device present\n"); 946 retval = -ENODEV; 947 goto exit; 948 } 949 950 if (n_bytes <= 0 || n_bytes > 32) { 951 pr_err_ratelimited("invalid payload size\n"); 952 retval = -EINVAL; 953 goto exit; 954 } 955 956 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) { 957 retval = -EFAULT; 958 goto exit; 959 } 960 961 /* Pad with spaces */ 962 for (i = n_bytes; i < 32; ++i) 963 ictx->tx.data_buf[i] = ' '; 964 965 for (i = 32; i < 35; ++i) 966 ictx->tx.data_buf[i] = 0xFF; 967 968 offset = 0; 969 seq = 0; 970 971 do { 972 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7); 973 ictx->usb_tx_buf[7] = (unsigned char) seq; 974 975 retval = send_packet(ictx); 976 if (retval) { 977 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 978 goto exit; 979 } else { 980 seq += 2; 981 offset += 7; 982 } 983 984 } while (offset < 35); 985 986 /* Send packet #6 */ 987 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); 988 ictx->usb_tx_buf[7] = (unsigned char) seq; 989 retval = send_packet(ictx); 990 if (retval) 991 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 992 993 exit: 994 mutex_unlock(&ictx->lock); 995 996 return (!retval) ? n_bytes : retval; 997 } 998 999 /** 1000 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte 1001 * packets. We accept data as 16 hexadecimal digits, followed by a 1002 * newline (to make it easy to drive the device from a command-line 1003 * -- even though the actual binary data is a bit complicated). 1004 * 1005 * The device itself is not a "traditional" text-mode display. It's 1006 * actually a 16x96 pixel bitmap display. That means if you want to 1007 * display text, you've got to have your own "font" and translate the 1008 * text into bitmaps for display. This is really flexible (you can 1009 * display whatever diacritics you need, and so on), but it's also 1010 * a lot more complicated than most LCDs... 1011 */ 1012 static ssize_t lcd_write(struct file *file, const char __user *buf, 1013 size_t n_bytes, loff_t *pos) 1014 { 1015 int retval = 0; 1016 struct imon_context *ictx; 1017 1018 ictx = file->private_data; 1019 if (!ictx) { 1020 pr_err_ratelimited("no context for device\n"); 1021 return -ENODEV; 1022 } 1023 1024 mutex_lock(&ictx->lock); 1025 1026 if (!ictx->display_supported) { 1027 pr_err_ratelimited("no iMON display present\n"); 1028 retval = -ENODEV; 1029 goto exit; 1030 } 1031 1032 if (n_bytes != 8) { 1033 pr_err_ratelimited("invalid payload size: %d (expected 8)\n", 1034 (int)n_bytes); 1035 retval = -EINVAL; 1036 goto exit; 1037 } 1038 1039 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) { 1040 retval = -EFAULT; 1041 goto exit; 1042 } 1043 1044 retval = send_packet(ictx); 1045 if (retval) { 1046 pr_err_ratelimited("send packet failed!\n"); 1047 goto exit; 1048 } else { 1049 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n", 1050 __func__, (int) n_bytes); 1051 } 1052 exit: 1053 mutex_unlock(&ictx->lock); 1054 return (!retval) ? n_bytes : retval; 1055 } 1056 1057 /** 1058 * Callback function for USB core API: transmit data 1059 */ 1060 static void usb_tx_callback(struct urb *urb) 1061 { 1062 struct imon_context *ictx; 1063 1064 if (!urb) 1065 return; 1066 ictx = (struct imon_context *)urb->context; 1067 if (!ictx) 1068 return; 1069 1070 ictx->tx.status = urb->status; 1071 1072 /* notify waiters that write has finished */ 1073 ictx->tx.busy = false; 1074 smp_rmb(); /* ensure later readers know we're not busy */ 1075 complete(&ictx->tx.finished); 1076 } 1077 1078 /** 1079 * report touchscreen input 1080 */ 1081 static void imon_touch_display_timeout(unsigned long data) 1082 { 1083 struct imon_context *ictx = (struct imon_context *)data; 1084 1085 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA) 1086 return; 1087 1088 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1089 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1090 input_report_key(ictx->touch, BTN_TOUCH, 0x00); 1091 input_sync(ictx->touch); 1092 } 1093 1094 /** 1095 * iMON IR receivers support two different signal sets -- those used by 1096 * the iMON remotes, and those used by the Windows MCE remotes (which is 1097 * really just RC-6), but only one or the other at a time, as the signals 1098 * are decoded onboard the receiver. 1099 * 1100 * This function gets called two different ways, one way is from 1101 * rc_register_device, for initial protocol selection/setup, and the other is 1102 * via a userspace-initiated protocol change request, either by direct sysfs 1103 * prodding or by something like ir-keytable. In the rc_register_device case, 1104 * the imon context lock is already held, but when initiated from userspace, 1105 * it is not, so we must acquire it prior to calling send_packet, which 1106 * requires that the lock is held. 1107 */ 1108 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_type) 1109 { 1110 int retval; 1111 struct imon_context *ictx = rc->priv; 1112 struct device *dev = ictx->dev; 1113 bool unlock = false; 1114 unsigned char ir_proto_packet[] = { 1115 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 }; 1116 1117 if (*rc_type && !(*rc_type & rc->allowed_protocols)) 1118 dev_warn(dev, "Looks like you're trying to use an IR protocol " 1119 "this device does not support\n"); 1120 1121 if (*rc_type & RC_BIT_RC6_MCE) { 1122 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n"); 1123 ir_proto_packet[0] = 0x01; 1124 *rc_type = RC_BIT_RC6_MCE; 1125 } else if (*rc_type & RC_BIT_OTHER) { 1126 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n"); 1127 if (!pad_stabilize) 1128 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1129 /* ir_proto_packet[0] = 0x00; // already the default */ 1130 *rc_type = RC_BIT_OTHER; 1131 } else { 1132 dev_warn(dev, "Unsupported IR protocol specified, overriding " 1133 "to iMON IR protocol\n"); 1134 if (!pad_stabilize) 1135 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1136 /* ir_proto_packet[0] = 0x00; // already the default */ 1137 *rc_type = RC_BIT_OTHER; 1138 } 1139 1140 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet)); 1141 1142 if (!mutex_is_locked(&ictx->lock)) { 1143 unlock = true; 1144 mutex_lock(&ictx->lock); 1145 } 1146 1147 retval = send_packet(ictx); 1148 if (retval) 1149 goto out; 1150 1151 ictx->rc_type = *rc_type; 1152 ictx->pad_mouse = false; 1153 1154 out: 1155 if (unlock) 1156 mutex_unlock(&ictx->lock); 1157 1158 return retval; 1159 } 1160 1161 static inline int tv2int(const struct timeval *a, const struct timeval *b) 1162 { 1163 int usecs = 0; 1164 int sec = 0; 1165 1166 if (b->tv_usec > a->tv_usec) { 1167 usecs = 1000000; 1168 sec--; 1169 } 1170 1171 usecs += a->tv_usec - b->tv_usec; 1172 1173 sec += a->tv_sec - b->tv_sec; 1174 sec *= 1000; 1175 usecs /= 1000; 1176 sec += usecs; 1177 1178 if (sec < 0) 1179 sec = 1000; 1180 1181 return sec; 1182 } 1183 1184 /** 1185 * The directional pad behaves a bit differently, depending on whether this is 1186 * one of the older ffdc devices or a newer device. Newer devices appear to 1187 * have a higher resolution matrix for more precise mouse movement, but it 1188 * makes things overly sensitive in keyboard mode, so we do some interesting 1189 * contortions to make it less touchy. Older devices run through the same 1190 * routine with shorter timeout and a smaller threshold. 1191 */ 1192 static int stabilize(int a, int b, u16 timeout, u16 threshold) 1193 { 1194 struct timeval ct; 1195 static struct timeval prev_time = {0, 0}; 1196 static struct timeval hit_time = {0, 0}; 1197 static int x, y, prev_result, hits; 1198 int result = 0; 1199 int msec, msec_hit; 1200 1201 do_gettimeofday(&ct); 1202 msec = tv2int(&ct, &prev_time); 1203 msec_hit = tv2int(&ct, &hit_time); 1204 1205 if (msec > 100) { 1206 x = 0; 1207 y = 0; 1208 hits = 0; 1209 } 1210 1211 x += a; 1212 y += b; 1213 1214 prev_time = ct; 1215 1216 if (abs(x) > threshold || abs(y) > threshold) { 1217 if (abs(y) > abs(x)) 1218 result = (y > 0) ? 0x7F : 0x80; 1219 else 1220 result = (x > 0) ? 0x7F00 : 0x8000; 1221 1222 x = 0; 1223 y = 0; 1224 1225 if (result == prev_result) { 1226 hits++; 1227 1228 if (hits > 3) { 1229 switch (result) { 1230 case 0x7F: 1231 y = 17 * threshold / 30; 1232 break; 1233 case 0x80: 1234 y -= 17 * threshold / 30; 1235 break; 1236 case 0x7F00: 1237 x = 17 * threshold / 30; 1238 break; 1239 case 0x8000: 1240 x -= 17 * threshold / 30; 1241 break; 1242 } 1243 } 1244 1245 if (hits == 2 && msec_hit < timeout) { 1246 result = 0; 1247 hits = 1; 1248 } 1249 } else { 1250 prev_result = result; 1251 hits = 1; 1252 hit_time = ct; 1253 } 1254 } 1255 1256 return result; 1257 } 1258 1259 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode) 1260 { 1261 u32 keycode; 1262 u32 release; 1263 bool is_release_code = false; 1264 1265 /* Look for the initial press of a button */ 1266 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1267 ictx->rc_toggle = 0x0; 1268 ictx->rc_scancode = scancode; 1269 1270 /* Look for the release of a button */ 1271 if (keycode == KEY_RESERVED) { 1272 release = scancode & ~0x4000; 1273 keycode = rc_g_keycode_from_table(ictx->rdev, release); 1274 if (keycode != KEY_RESERVED) 1275 is_release_code = true; 1276 } 1277 1278 ictx->release_code = is_release_code; 1279 1280 return keycode; 1281 } 1282 1283 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode) 1284 { 1285 u32 keycode; 1286 1287 #define MCE_KEY_MASK 0x7000 1288 #define MCE_TOGGLE_BIT 0x8000 1289 1290 /* 1291 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx 1292 * (the toggle bit flipping between alternating key presses), while 1293 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep 1294 * the table trim, we always or in the bits to look up 0x8000ff4xx, 1295 * but we can't or them into all codes, as some keys are decoded in 1296 * a different way w/o the same use of the toggle bit... 1297 */ 1298 if (scancode & 0x80000000) 1299 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT; 1300 1301 ictx->rc_scancode = scancode; 1302 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1303 1304 /* not used in mce mode, but make sure we know its false */ 1305 ictx->release_code = false; 1306 1307 return keycode; 1308 } 1309 1310 static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code) 1311 { 1312 int i; 1313 u32 keycode = KEY_RESERVED; 1314 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table; 1315 1316 for (i = 0; key_table[i].hw_code != 0; i++) { 1317 if (key_table[i].hw_code == (code | 0xffee)) { 1318 keycode = key_table[i].keycode; 1319 break; 1320 } 1321 } 1322 ictx->release_code = false; 1323 return keycode; 1324 } 1325 1326 static bool imon_mouse_event(struct imon_context *ictx, 1327 unsigned char *buf, int len) 1328 { 1329 signed char rel_x = 0x00, rel_y = 0x00; 1330 u8 right_shift = 1; 1331 bool mouse_input = true; 1332 int dir = 0; 1333 unsigned long flags; 1334 1335 spin_lock_irqsave(&ictx->kc_lock, flags); 1336 1337 /* newer iMON device PAD or mouse button */ 1338 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) { 1339 rel_x = buf[2]; 1340 rel_y = buf[3]; 1341 right_shift = 1; 1342 /* 0xffdc iMON PAD or mouse button input */ 1343 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) && 1344 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) { 1345 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1346 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1347 if (buf[0] & 0x02) 1348 rel_x |= ~0x0f; 1349 rel_x = rel_x + rel_x / 2; 1350 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1351 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1352 if (buf[0] & 0x01) 1353 rel_y |= ~0x0f; 1354 rel_y = rel_y + rel_y / 2; 1355 right_shift = 2; 1356 /* some ffdc devices decode mouse buttons differently... */ 1357 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) { 1358 right_shift = 2; 1359 /* ch+/- buttons, which we use for an emulated scroll wheel */ 1360 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) { 1361 dir = 1; 1362 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) { 1363 dir = -1; 1364 } else 1365 mouse_input = false; 1366 1367 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1368 1369 if (mouse_input) { 1370 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n"); 1371 1372 if (dir) { 1373 input_report_rel(ictx->idev, REL_WHEEL, dir); 1374 } else if (rel_x || rel_y) { 1375 input_report_rel(ictx->idev, REL_X, rel_x); 1376 input_report_rel(ictx->idev, REL_Y, rel_y); 1377 } else { 1378 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1); 1379 input_report_key(ictx->idev, BTN_RIGHT, 1380 buf[1] >> right_shift & 0x1); 1381 } 1382 input_sync(ictx->idev); 1383 spin_lock_irqsave(&ictx->kc_lock, flags); 1384 ictx->last_keycode = ictx->kc; 1385 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1386 } 1387 1388 return mouse_input; 1389 } 1390 1391 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf) 1392 { 1393 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT); 1394 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4); 1395 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf)); 1396 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1397 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1398 input_report_key(ictx->touch, BTN_TOUCH, 0x01); 1399 input_sync(ictx->touch); 1400 } 1401 1402 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf) 1403 { 1404 int dir = 0; 1405 signed char rel_x = 0x00, rel_y = 0x00; 1406 u16 timeout, threshold; 1407 u32 scancode = KEY_RESERVED; 1408 unsigned long flags; 1409 1410 /* 1411 * The imon directional pad functions more like a touchpad. Bytes 3 & 4 1412 * contain a position coordinate (x,y), with each component ranging 1413 * from -14 to 14. We want to down-sample this to only 4 discrete values 1414 * for up/down/left/right arrow keys. Also, when you get too close to 1415 * diagonals, it has a tendency to jump back and forth, so lets try to 1416 * ignore when they get too close. 1417 */ 1418 if (ictx->product != 0xffdc) { 1419 /* first, pad to 8 bytes so it conforms with everything else */ 1420 buf[5] = buf[6] = buf[7] = 0; 1421 timeout = 500; /* in msecs */ 1422 /* (2*threshold) x (2*threshold) square */ 1423 threshold = pad_thresh ? pad_thresh : 28; 1424 rel_x = buf[2]; 1425 rel_y = buf[3]; 1426 1427 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) { 1428 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) { 1429 dir = stabilize((int)rel_x, (int)rel_y, 1430 timeout, threshold); 1431 if (!dir) { 1432 spin_lock_irqsave(&ictx->kc_lock, 1433 flags); 1434 ictx->kc = KEY_UNKNOWN; 1435 spin_unlock_irqrestore(&ictx->kc_lock, 1436 flags); 1437 return; 1438 } 1439 buf[2] = dir & 0xFF; 1440 buf[3] = (dir >> 8) & 0xFF; 1441 scancode = be32_to_cpu(*((__be32 *)buf)); 1442 } 1443 } else { 1444 /* 1445 * Hack alert: instead of using keycodes, we have 1446 * to use hard-coded scancodes here... 1447 */ 1448 if (abs(rel_y) > abs(rel_x)) { 1449 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1450 buf[3] = 0; 1451 if (rel_y > 0) 1452 scancode = 0x01007f00; /* KEY_DOWN */ 1453 else 1454 scancode = 0x01008000; /* KEY_UP */ 1455 } else { 1456 buf[2] = 0; 1457 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1458 if (rel_x > 0) 1459 scancode = 0x0100007f; /* KEY_RIGHT */ 1460 else 1461 scancode = 0x01000080; /* KEY_LEFT */ 1462 } 1463 } 1464 1465 /* 1466 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad 1467 * device (15c2:ffdc). The remote generates various codes from 1468 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates 1469 * 0x688301b7 and the right one 0x688481b7. All other keys generate 1470 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with 1471 * reversed endianness. Extract direction from buffer, rotate endianness, 1472 * adjust sign and feed the values into stabilize(). The resulting codes 1473 * will be 0x01008000, 0x01007F00, which match the newer devices. 1474 */ 1475 } else { 1476 timeout = 10; /* in msecs */ 1477 /* (2*threshold) x (2*threshold) square */ 1478 threshold = pad_thresh ? pad_thresh : 15; 1479 1480 /* buf[1] is x */ 1481 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1482 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1483 if (buf[0] & 0x02) 1484 rel_x |= ~0x10+1; 1485 /* buf[2] is y */ 1486 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1487 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1488 if (buf[0] & 0x01) 1489 rel_y |= ~0x10+1; 1490 1491 buf[0] = 0x01; 1492 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0; 1493 1494 if (ictx->rc_type == RC_BIT_OTHER && pad_stabilize) { 1495 dir = stabilize((int)rel_x, (int)rel_y, 1496 timeout, threshold); 1497 if (!dir) { 1498 spin_lock_irqsave(&ictx->kc_lock, flags); 1499 ictx->kc = KEY_UNKNOWN; 1500 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1501 return; 1502 } 1503 buf[2] = dir & 0xFF; 1504 buf[3] = (dir >> 8) & 0xFF; 1505 scancode = be32_to_cpu(*((__be32 *)buf)); 1506 } else { 1507 /* 1508 * Hack alert: instead of using keycodes, we have 1509 * to use hard-coded scancodes here... 1510 */ 1511 if (abs(rel_y) > abs(rel_x)) { 1512 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1513 buf[3] = 0; 1514 if (rel_y > 0) 1515 scancode = 0x01007f00; /* KEY_DOWN */ 1516 else 1517 scancode = 0x01008000; /* KEY_UP */ 1518 } else { 1519 buf[2] = 0; 1520 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1521 if (rel_x > 0) 1522 scancode = 0x0100007f; /* KEY_RIGHT */ 1523 else 1524 scancode = 0x01000080; /* KEY_LEFT */ 1525 } 1526 } 1527 } 1528 1529 if (scancode) { 1530 spin_lock_irqsave(&ictx->kc_lock, flags); 1531 ictx->kc = imon_remote_key_lookup(ictx, scancode); 1532 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1533 } 1534 } 1535 1536 /** 1537 * figure out if these is a press or a release. We don't actually 1538 * care about repeats, as those will be auto-generated within the IR 1539 * subsystem for repeating scancodes. 1540 */ 1541 static int imon_parse_press_type(struct imon_context *ictx, 1542 unsigned char *buf, u8 ktype) 1543 { 1544 int press_type = 0; 1545 unsigned long flags; 1546 1547 spin_lock_irqsave(&ictx->kc_lock, flags); 1548 1549 /* key release of 0x02XXXXXX key */ 1550 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00) 1551 ictx->kc = ictx->last_keycode; 1552 1553 /* mouse button release on (some) 0xffdc devices */ 1554 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 && 1555 buf[2] == 0x81 && buf[3] == 0xb7) 1556 ictx->kc = ictx->last_keycode; 1557 1558 /* mouse button release on (some other) 0xffdc devices */ 1559 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 && 1560 buf[2] == 0x81 && buf[3] == 0xb7) 1561 ictx->kc = ictx->last_keycode; 1562 1563 /* mce-specific button handling, no keyup events */ 1564 else if (ktype == IMON_KEY_MCE) { 1565 ictx->rc_toggle = buf[2]; 1566 press_type = 1; 1567 1568 /* incoherent or irrelevant data */ 1569 } else if (ictx->kc == KEY_RESERVED) 1570 press_type = -EINVAL; 1571 1572 /* key release of 0xXXXXXXb7 key */ 1573 else if (ictx->release_code) 1574 press_type = 0; 1575 1576 /* this is a button press */ 1577 else 1578 press_type = 1; 1579 1580 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1581 1582 return press_type; 1583 } 1584 1585 /** 1586 * Process the incoming packet 1587 */ 1588 static void imon_incoming_packet(struct imon_context *ictx, 1589 struct urb *urb, int intf) 1590 { 1591 int len = urb->actual_length; 1592 unsigned char *buf = urb->transfer_buffer; 1593 struct device *dev = ictx->dev; 1594 unsigned long flags; 1595 u32 kc; 1596 int i; 1597 u64 scancode; 1598 int press_type = 0; 1599 int msec; 1600 struct timeval t; 1601 static struct timeval prev_time = { 0, 0 }; 1602 u8 ktype; 1603 1604 /* filter out junk data on the older 0xffdc imon devices */ 1605 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff)) 1606 return; 1607 1608 /* Figure out what key was pressed */ 1609 if (len == 8 && buf[7] == 0xee) { 1610 scancode = be64_to_cpu(*((__be64 *)buf)); 1611 ktype = IMON_KEY_PANEL; 1612 kc = imon_panel_key_lookup(ictx, scancode); 1613 ictx->release_code = false; 1614 } else { 1615 scancode = be32_to_cpu(*((__be32 *)buf)); 1616 if (ictx->rc_type == RC_BIT_RC6_MCE) { 1617 ktype = IMON_KEY_IMON; 1618 if (buf[0] == 0x80) 1619 ktype = IMON_KEY_MCE; 1620 kc = imon_mce_key_lookup(ictx, scancode); 1621 } else { 1622 ktype = IMON_KEY_IMON; 1623 kc = imon_remote_key_lookup(ictx, scancode); 1624 } 1625 } 1626 1627 spin_lock_irqsave(&ictx->kc_lock, flags); 1628 /* keyboard/mouse mode toggle button */ 1629 if (kc == KEY_KEYBOARD && !ictx->release_code) { 1630 ictx->last_keycode = kc; 1631 if (!nomouse) { 1632 ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1; 1633 dev_dbg(dev, "toggling to %s mode\n", 1634 ictx->pad_mouse ? "mouse" : "keyboard"); 1635 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1636 return; 1637 } else { 1638 ictx->pad_mouse = false; 1639 dev_dbg(dev, "mouse mode disabled, passing key value\n"); 1640 } 1641 } 1642 1643 ictx->kc = kc; 1644 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1645 1646 /* send touchscreen events through input subsystem if touchpad data */ 1647 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 && 1648 buf[7] == 0x86) { 1649 imon_touch_event(ictx, buf); 1650 return; 1651 1652 /* look for mouse events with pad in mouse mode */ 1653 } else if (ictx->pad_mouse) { 1654 if (imon_mouse_event(ictx, buf, len)) 1655 return; 1656 } 1657 1658 /* Now for some special handling to convert pad input to arrow keys */ 1659 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) || 1660 ((len == 8) && (buf[0] & 0x40) && 1661 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) { 1662 len = 8; 1663 imon_pad_to_keys(ictx, buf); 1664 } 1665 1666 if (debug) { 1667 printk(KERN_INFO "intf%d decoded packet: ", intf); 1668 for (i = 0; i < len; ++i) 1669 printk("%02x ", buf[i]); 1670 printk("\n"); 1671 } 1672 1673 press_type = imon_parse_press_type(ictx, buf, ktype); 1674 if (press_type < 0) 1675 goto not_input_data; 1676 1677 if (ktype != IMON_KEY_PANEL) { 1678 if (press_type == 0) 1679 rc_keyup(ictx->rdev); 1680 else { 1681 if (ictx->rc_type == RC_BIT_RC6_MCE) 1682 rc_keydown(ictx->rdev, 1683 ictx->rc_type == RC_BIT_RC6_MCE ? RC_TYPE_RC6_MCE : RC_TYPE_OTHER, 1684 ictx->rc_scancode, ictx->rc_toggle); 1685 spin_lock_irqsave(&ictx->kc_lock, flags); 1686 ictx->last_keycode = ictx->kc; 1687 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1688 } 1689 return; 1690 } 1691 1692 /* Only panel type events left to process now */ 1693 spin_lock_irqsave(&ictx->kc_lock, flags); 1694 1695 do_gettimeofday(&t); 1696 /* KEY_MUTE repeats from knob need to be suppressed */ 1697 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) { 1698 msec = tv2int(&t, &prev_time); 1699 if (msec < ictx->idev->rep[REP_DELAY]) { 1700 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1701 return; 1702 } 1703 } 1704 prev_time = t; 1705 kc = ictx->kc; 1706 1707 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1708 1709 input_report_key(ictx->idev, kc, press_type); 1710 input_sync(ictx->idev); 1711 1712 /* panel keys don't generate a release */ 1713 input_report_key(ictx->idev, kc, 0); 1714 input_sync(ictx->idev); 1715 1716 spin_lock_irqsave(&ictx->kc_lock, flags); 1717 ictx->last_keycode = kc; 1718 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1719 1720 return; 1721 1722 not_input_data: 1723 if (len != 8) { 1724 dev_warn(dev, "imon %s: invalid incoming packet " 1725 "size (len = %d, intf%d)\n", __func__, len, intf); 1726 return; 1727 } 1728 1729 /* iMON 2.4G associate frame */ 1730 if (buf[0] == 0x00 && 1731 buf[2] == 0xFF && /* REFID */ 1732 buf[3] == 0xFF && 1733 buf[4] == 0xFF && 1734 buf[5] == 0xFF && /* iMON 2.4G */ 1735 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */ 1736 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */ 1737 dev_warn(dev, "%s: remote associated refid=%02X\n", 1738 __func__, buf[1]); 1739 ictx->rf_isassociating = false; 1740 } 1741 } 1742 1743 /** 1744 * Callback function for USB core API: receive data 1745 */ 1746 static void usb_rx_callback_intf0(struct urb *urb) 1747 { 1748 struct imon_context *ictx; 1749 int intfnum = 0; 1750 1751 if (!urb) 1752 return; 1753 1754 ictx = (struct imon_context *)urb->context; 1755 if (!ictx) 1756 return; 1757 1758 /* 1759 * if we get a callback before we're done configuring the hardware, we 1760 * can't yet process the data, as there's nowhere to send it, but we 1761 * still need to submit a new rx URB to avoid wedging the hardware 1762 */ 1763 if (!ictx->dev_present_intf0) 1764 goto out; 1765 1766 switch (urb->status) { 1767 case -ENOENT: /* usbcore unlink successful! */ 1768 return; 1769 1770 case -ESHUTDOWN: /* transport endpoint was shut down */ 1771 break; 1772 1773 case 0: 1774 imon_incoming_packet(ictx, urb, intfnum); 1775 break; 1776 1777 default: 1778 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1779 __func__, urb->status); 1780 break; 1781 } 1782 1783 out: 1784 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 1785 } 1786 1787 static void usb_rx_callback_intf1(struct urb *urb) 1788 { 1789 struct imon_context *ictx; 1790 int intfnum = 1; 1791 1792 if (!urb) 1793 return; 1794 1795 ictx = (struct imon_context *)urb->context; 1796 if (!ictx) 1797 return; 1798 1799 /* 1800 * if we get a callback before we're done configuring the hardware, we 1801 * can't yet process the data, as there's nowhere to send it, but we 1802 * still need to submit a new rx URB to avoid wedging the hardware 1803 */ 1804 if (!ictx->dev_present_intf1) 1805 goto out; 1806 1807 switch (urb->status) { 1808 case -ENOENT: /* usbcore unlink successful! */ 1809 return; 1810 1811 case -ESHUTDOWN: /* transport endpoint was shut down */ 1812 break; 1813 1814 case 0: 1815 imon_incoming_packet(ictx, urb, intfnum); 1816 break; 1817 1818 default: 1819 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1820 __func__, urb->status); 1821 break; 1822 } 1823 1824 out: 1825 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 1826 } 1827 1828 /* 1829 * The 0x15c2:0xffdc device ID was used for umpteen different imon 1830 * devices, and all of them constantly spew interrupts, even when there 1831 * is no actual data to report. However, byte 6 of this buffer looks like 1832 * its unique across device variants, so we're trying to key off that to 1833 * figure out which display type (if any) and what IR protocol the device 1834 * actually supports. These devices have their IR protocol hard-coded into 1835 * their firmware, they can't be changed on the fly like the newer hardware. 1836 */ 1837 static void imon_get_ffdc_type(struct imon_context *ictx) 1838 { 1839 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6]; 1840 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE; 1841 u64 allowed_protos = RC_BIT_OTHER; 1842 1843 switch (ffdc_cfg_byte) { 1844 /* iMON Knob, no display, iMON IR + vol knob */ 1845 case 0x21: 1846 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR"); 1847 ictx->display_supported = false; 1848 break; 1849 /* iMON 2.4G LT (usb stick), no display, iMON RF */ 1850 case 0x4e: 1851 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF"); 1852 ictx->display_supported = false; 1853 ictx->rf_device = true; 1854 break; 1855 /* iMON VFD, no IR (does have vol knob tho) */ 1856 case 0x35: 1857 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR"); 1858 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1859 break; 1860 /* iMON VFD, iMON IR */ 1861 case 0x24: 1862 case 0x85: 1863 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR"); 1864 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1865 break; 1866 /* iMON VFD, MCE IR */ 1867 case 0x46: 1868 case 0x7e: 1869 case 0x9e: 1870 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR"); 1871 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1872 allowed_protos = RC_BIT_RC6_MCE; 1873 break; 1874 /* iMON LCD, MCE IR */ 1875 case 0x9f: 1876 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR"); 1877 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1878 allowed_protos = RC_BIT_RC6_MCE; 1879 break; 1880 default: 1881 dev_info(ictx->dev, "Unknown 0xffdc device, " 1882 "defaulting to VFD and iMON IR"); 1883 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1884 /* We don't know which one it is, allow user to set the 1885 * RC6 one from userspace if OTHER wasn't correct. */ 1886 allowed_protos |= RC_BIT_RC6_MCE; 1887 break; 1888 } 1889 1890 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte); 1891 1892 ictx->display_type = detected_display_type; 1893 ictx->rc_type = allowed_protos; 1894 } 1895 1896 static void imon_set_display_type(struct imon_context *ictx) 1897 { 1898 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1899 1900 /* 1901 * Try to auto-detect the type of display if the user hasn't set 1902 * it by hand via the display_type modparam. Default is VFD. 1903 */ 1904 1905 if (display_type == IMON_DISPLAY_TYPE_AUTO) { 1906 switch (ictx->product) { 1907 case 0xffdc: 1908 /* set in imon_get_ffdc_type() */ 1909 configured_display_type = ictx->display_type; 1910 break; 1911 case 0x0034: 1912 case 0x0035: 1913 configured_display_type = IMON_DISPLAY_TYPE_VGA; 1914 break; 1915 case 0x0038: 1916 case 0x0039: 1917 case 0x0045: 1918 configured_display_type = IMON_DISPLAY_TYPE_LCD; 1919 break; 1920 case 0x003c: 1921 case 0x0041: 1922 case 0x0042: 1923 case 0x0043: 1924 configured_display_type = IMON_DISPLAY_TYPE_NONE; 1925 ictx->display_supported = false; 1926 break; 1927 case 0x0036: 1928 case 0x0044: 1929 default: 1930 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1931 break; 1932 } 1933 } else { 1934 configured_display_type = display_type; 1935 if (display_type == IMON_DISPLAY_TYPE_NONE) 1936 ictx->display_supported = false; 1937 else 1938 ictx->display_supported = true; 1939 dev_info(ictx->dev, "%s: overriding display type to %d via " 1940 "modparam\n", __func__, display_type); 1941 } 1942 1943 ictx->display_type = configured_display_type; 1944 } 1945 1946 static struct rc_dev *imon_init_rdev(struct imon_context *ictx) 1947 { 1948 struct rc_dev *rdev; 1949 int ret; 1950 const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00, 1951 0x00, 0x00, 0x00, 0x88 }; 1952 1953 rdev = rc_allocate_device(); 1954 if (!rdev) { 1955 dev_err(ictx->dev, "remote control dev allocation failed\n"); 1956 goto out; 1957 } 1958 1959 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev), 1960 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product); 1961 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev, 1962 sizeof(ictx->phys_rdev)); 1963 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev)); 1964 1965 rdev->input_name = ictx->name_rdev; 1966 rdev->input_phys = ictx->phys_rdev; 1967 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id); 1968 rdev->dev.parent = ictx->dev; 1969 1970 rdev->priv = ictx; 1971 rdev->driver_type = RC_DRIVER_SCANCODE; 1972 rdev->allowed_protocols = RC_BIT_OTHER | RC_BIT_RC6_MCE; /* iMON PAD or MCE */ 1973 rdev->change_protocol = imon_ir_change_protocol; 1974 rdev->driver_name = MOD_NAME; 1975 1976 /* Enable front-panel buttons and/or knobs */ 1977 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet)); 1978 ret = send_packet(ictx); 1979 /* Not fatal, but warn about it */ 1980 if (ret) 1981 dev_info(ictx->dev, "panel buttons/knobs setup failed\n"); 1982 1983 if (ictx->product == 0xffdc) { 1984 imon_get_ffdc_type(ictx); 1985 rdev->allowed_protocols = ictx->rc_type; 1986 } 1987 1988 imon_set_display_type(ictx); 1989 1990 if (ictx->rc_type == RC_BIT_RC6_MCE) 1991 rdev->map_name = RC_MAP_IMON_MCE; 1992 else 1993 rdev->map_name = RC_MAP_IMON_PAD; 1994 1995 ret = rc_register_device(rdev); 1996 if (ret < 0) { 1997 dev_err(ictx->dev, "remote input dev register failed\n"); 1998 goto out; 1999 } 2000 2001 return rdev; 2002 2003 out: 2004 rc_free_device(rdev); 2005 return NULL; 2006 } 2007 2008 static struct input_dev *imon_init_idev(struct imon_context *ictx) 2009 { 2010 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table; 2011 struct input_dev *idev; 2012 int ret, i; 2013 2014 idev = input_allocate_device(); 2015 if (!idev) 2016 goto out; 2017 2018 snprintf(ictx->name_idev, sizeof(ictx->name_idev), 2019 "iMON Panel, Knob and Mouse(%04x:%04x)", 2020 ictx->vendor, ictx->product); 2021 idev->name = ictx->name_idev; 2022 2023 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev, 2024 sizeof(ictx->phys_idev)); 2025 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev)); 2026 idev->phys = ictx->phys_idev; 2027 2028 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL); 2029 2030 idev->keybit[BIT_WORD(BTN_MOUSE)] = 2031 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2032 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | 2033 BIT_MASK(REL_WHEEL); 2034 2035 /* panel and/or knob code support */ 2036 for (i = 0; key_table[i].hw_code != 0; i++) { 2037 u32 kc = key_table[i].keycode; 2038 __set_bit(kc, idev->keybit); 2039 } 2040 2041 usb_to_input_id(ictx->usbdev_intf0, &idev->id); 2042 idev->dev.parent = ictx->dev; 2043 input_set_drvdata(idev, ictx); 2044 2045 ret = input_register_device(idev); 2046 if (ret < 0) { 2047 dev_err(ictx->dev, "input dev register failed\n"); 2048 goto out; 2049 } 2050 2051 return idev; 2052 2053 out: 2054 input_free_device(idev); 2055 return NULL; 2056 } 2057 2058 static struct input_dev *imon_init_touch(struct imon_context *ictx) 2059 { 2060 struct input_dev *touch; 2061 int ret; 2062 2063 touch = input_allocate_device(); 2064 if (!touch) 2065 goto touch_alloc_failed; 2066 2067 snprintf(ictx->name_touch, sizeof(ictx->name_touch), 2068 "iMON USB Touchscreen (%04x:%04x)", 2069 ictx->vendor, ictx->product); 2070 touch->name = ictx->name_touch; 2071 2072 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch, 2073 sizeof(ictx->phys_touch)); 2074 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch)); 2075 touch->phys = ictx->phys_touch; 2076 2077 touch->evbit[0] = 2078 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 2079 touch->keybit[BIT_WORD(BTN_TOUCH)] = 2080 BIT_MASK(BTN_TOUCH); 2081 input_set_abs_params(touch, ABS_X, 2082 0x00, 0xfff, 0, 0); 2083 input_set_abs_params(touch, ABS_Y, 2084 0x00, 0xfff, 0, 0); 2085 2086 input_set_drvdata(touch, ictx); 2087 2088 usb_to_input_id(ictx->usbdev_intf1, &touch->id); 2089 touch->dev.parent = ictx->dev; 2090 ret = input_register_device(touch); 2091 if (ret < 0) { 2092 dev_info(ictx->dev, "touchscreen input dev register failed\n"); 2093 goto touch_register_failed; 2094 } 2095 2096 return touch; 2097 2098 touch_register_failed: 2099 input_free_device(touch); 2100 2101 touch_alloc_failed: 2102 return NULL; 2103 } 2104 2105 static bool imon_find_endpoints(struct imon_context *ictx, 2106 struct usb_host_interface *iface_desc) 2107 { 2108 struct usb_endpoint_descriptor *ep; 2109 struct usb_endpoint_descriptor *rx_endpoint = NULL; 2110 struct usb_endpoint_descriptor *tx_endpoint = NULL; 2111 int ifnum = iface_desc->desc.bInterfaceNumber; 2112 int num_endpts = iface_desc->desc.bNumEndpoints; 2113 int i, ep_dir, ep_type; 2114 bool ir_ep_found = false; 2115 bool display_ep_found = false; 2116 bool tx_control = false; 2117 2118 /* 2119 * Scan the endpoint list and set: 2120 * first input endpoint = IR endpoint 2121 * first output endpoint = display endpoint 2122 */ 2123 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) { 2124 ep = &iface_desc->endpoint[i].desc; 2125 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; 2126 ep_type = usb_endpoint_type(ep); 2127 2128 if (!ir_ep_found && ep_dir == USB_DIR_IN && 2129 ep_type == USB_ENDPOINT_XFER_INT) { 2130 2131 rx_endpoint = ep; 2132 ir_ep_found = true; 2133 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__); 2134 2135 } else if (!display_ep_found && ep_dir == USB_DIR_OUT && 2136 ep_type == USB_ENDPOINT_XFER_INT) { 2137 tx_endpoint = ep; 2138 display_ep_found = true; 2139 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__); 2140 } 2141 } 2142 2143 if (ifnum == 0) { 2144 ictx->rx_endpoint_intf0 = rx_endpoint; 2145 /* 2146 * tx is used to send characters to lcd/vfd, associate RF 2147 * remotes, set IR protocol, and maybe more... 2148 */ 2149 ictx->tx_endpoint = tx_endpoint; 2150 } else { 2151 ictx->rx_endpoint_intf1 = rx_endpoint; 2152 } 2153 2154 /* 2155 * If we didn't find a display endpoint, this is probably one of the 2156 * newer iMON devices that use control urb instead of interrupt 2157 */ 2158 if (!display_ep_found) { 2159 tx_control = true; 2160 display_ep_found = true; 2161 dev_dbg(ictx->dev, "%s: device uses control endpoint, not " 2162 "interface OUT endpoint\n", __func__); 2163 } 2164 2165 /* 2166 * Some iMON receivers have no display. Unfortunately, it seems 2167 * that SoundGraph recycles device IDs between devices both with 2168 * and without... :\ 2169 */ 2170 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) { 2171 display_ep_found = false; 2172 dev_dbg(ictx->dev, "%s: device has no display\n", __func__); 2173 } 2174 2175 /* 2176 * iMON Touch devices have a VGA touchscreen, but no "display", as 2177 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD). 2178 */ 2179 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2180 display_ep_found = false; 2181 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__); 2182 } 2183 2184 /* Input endpoint is mandatory */ 2185 if (!ir_ep_found) 2186 pr_err("no valid input (IR) endpoint found\n"); 2187 2188 ictx->tx_control = tx_control; 2189 2190 if (display_ep_found) 2191 ictx->display_supported = true; 2192 2193 return ir_ep_found; 2194 2195 } 2196 2197 static struct imon_context *imon_init_intf0(struct usb_interface *intf, 2198 const struct usb_device_id *id) 2199 { 2200 struct imon_context *ictx; 2201 struct urb *rx_urb; 2202 struct urb *tx_urb; 2203 struct device *dev = &intf->dev; 2204 struct usb_host_interface *iface_desc; 2205 int ret = -ENOMEM; 2206 2207 ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL); 2208 if (!ictx) { 2209 dev_err(dev, "%s: kzalloc failed for context", __func__); 2210 goto exit; 2211 } 2212 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2213 if (!rx_urb) { 2214 dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__); 2215 goto rx_urb_alloc_failed; 2216 } 2217 tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2218 if (!tx_urb) { 2219 dev_err(dev, "%s: usb_alloc_urb failed for display urb", 2220 __func__); 2221 goto tx_urb_alloc_failed; 2222 } 2223 2224 mutex_init(&ictx->lock); 2225 spin_lock_init(&ictx->kc_lock); 2226 2227 mutex_lock(&ictx->lock); 2228 2229 ictx->dev = dev; 2230 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf)); 2231 ictx->rx_urb_intf0 = rx_urb; 2232 ictx->tx_urb = tx_urb; 2233 ictx->rf_device = false; 2234 2235 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor); 2236 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct); 2237 2238 /* save drive info for later accessing the panel/knob key table */ 2239 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info; 2240 /* default send_packet delay is 5ms but some devices need more */ 2241 ictx->send_packet_delay = ictx->dev_descr->flags & 2242 IMON_NEED_20MS_PKT_DELAY ? 20 : 5; 2243 2244 ret = -ENODEV; 2245 iface_desc = intf->cur_altsetting; 2246 if (!imon_find_endpoints(ictx, iface_desc)) { 2247 goto find_endpoint_failed; 2248 } 2249 2250 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2251 usb_rcvintpipe(ictx->usbdev_intf0, 2252 ictx->rx_endpoint_intf0->bEndpointAddress), 2253 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2254 usb_rx_callback_intf0, ictx, 2255 ictx->rx_endpoint_intf0->bInterval); 2256 2257 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL); 2258 if (ret) { 2259 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret); 2260 goto urb_submit_failed; 2261 } 2262 2263 ictx->idev = imon_init_idev(ictx); 2264 if (!ictx->idev) { 2265 dev_err(dev, "%s: input device setup failed\n", __func__); 2266 goto idev_setup_failed; 2267 } 2268 2269 ictx->rdev = imon_init_rdev(ictx); 2270 if (!ictx->rdev) { 2271 dev_err(dev, "%s: rc device setup failed\n", __func__); 2272 goto rdev_setup_failed; 2273 } 2274 2275 ictx->dev_present_intf0 = true; 2276 2277 mutex_unlock(&ictx->lock); 2278 return ictx; 2279 2280 rdev_setup_failed: 2281 input_unregister_device(ictx->idev); 2282 idev_setup_failed: 2283 usb_kill_urb(ictx->rx_urb_intf0); 2284 urb_submit_failed: 2285 find_endpoint_failed: 2286 usb_put_dev(ictx->usbdev_intf0); 2287 mutex_unlock(&ictx->lock); 2288 usb_free_urb(tx_urb); 2289 tx_urb_alloc_failed: 2290 usb_free_urb(rx_urb); 2291 rx_urb_alloc_failed: 2292 kfree(ictx); 2293 exit: 2294 dev_err(dev, "unable to initialize intf0, err %d\n", ret); 2295 2296 return NULL; 2297 } 2298 2299 static struct imon_context *imon_init_intf1(struct usb_interface *intf, 2300 struct imon_context *ictx) 2301 { 2302 struct urb *rx_urb; 2303 struct usb_host_interface *iface_desc; 2304 int ret = -ENOMEM; 2305 2306 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2307 if (!rx_urb) { 2308 pr_err("usb_alloc_urb failed for IR urb\n"); 2309 goto rx_urb_alloc_failed; 2310 } 2311 2312 mutex_lock(&ictx->lock); 2313 2314 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2315 init_timer(&ictx->ttimer); 2316 ictx->ttimer.data = (unsigned long)ictx; 2317 ictx->ttimer.function = imon_touch_display_timeout; 2318 } 2319 2320 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf)); 2321 ictx->rx_urb_intf1 = rx_urb; 2322 2323 ret = -ENODEV; 2324 iface_desc = intf->cur_altsetting; 2325 if (!imon_find_endpoints(ictx, iface_desc)) 2326 goto find_endpoint_failed; 2327 2328 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2329 ictx->touch = imon_init_touch(ictx); 2330 if (!ictx->touch) 2331 goto touch_setup_failed; 2332 } else 2333 ictx->touch = NULL; 2334 2335 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2336 usb_rcvintpipe(ictx->usbdev_intf1, 2337 ictx->rx_endpoint_intf1->bEndpointAddress), 2338 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2339 usb_rx_callback_intf1, ictx, 2340 ictx->rx_endpoint_intf1->bInterval); 2341 2342 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL); 2343 2344 if (ret) { 2345 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret); 2346 goto urb_submit_failed; 2347 } 2348 2349 ictx->dev_present_intf1 = true; 2350 2351 mutex_unlock(&ictx->lock); 2352 return ictx; 2353 2354 urb_submit_failed: 2355 if (ictx->touch) 2356 input_unregister_device(ictx->touch); 2357 touch_setup_failed: 2358 find_endpoint_failed: 2359 usb_put_dev(ictx->usbdev_intf1); 2360 mutex_unlock(&ictx->lock); 2361 usb_free_urb(rx_urb); 2362 rx_urb_alloc_failed: 2363 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret); 2364 2365 return NULL; 2366 } 2367 2368 static void imon_init_display(struct imon_context *ictx, 2369 struct usb_interface *intf) 2370 { 2371 int ret; 2372 2373 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n"); 2374 2375 /* set up sysfs entry for built-in clock */ 2376 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group); 2377 if (ret) 2378 dev_err(ictx->dev, "Could not create display sysfs " 2379 "entries(%d)", ret); 2380 2381 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2382 ret = usb_register_dev(intf, &imon_lcd_class); 2383 else 2384 ret = usb_register_dev(intf, &imon_vfd_class); 2385 if (ret) 2386 /* Not a fatal error, so ignore */ 2387 dev_info(ictx->dev, "could not get a minor number for " 2388 "display\n"); 2389 2390 } 2391 2392 /** 2393 * Callback function for USB core API: Probe 2394 */ 2395 static int imon_probe(struct usb_interface *interface, 2396 const struct usb_device_id *id) 2397 { 2398 struct usb_device *usbdev = NULL; 2399 struct usb_host_interface *iface_desc = NULL; 2400 struct usb_interface *first_if; 2401 struct device *dev = &interface->dev; 2402 int ifnum, sysfs_err; 2403 int ret = 0; 2404 struct imon_context *ictx = NULL; 2405 struct imon_context *first_if_ctx = NULL; 2406 u16 vendor, product; 2407 2408 usbdev = usb_get_dev(interface_to_usbdev(interface)); 2409 iface_desc = interface->cur_altsetting; 2410 ifnum = iface_desc->desc.bInterfaceNumber; 2411 vendor = le16_to_cpu(usbdev->descriptor.idVendor); 2412 product = le16_to_cpu(usbdev->descriptor.idProduct); 2413 2414 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n", 2415 __func__, vendor, product, ifnum); 2416 2417 /* prevent races probing devices w/multiple interfaces */ 2418 mutex_lock(&driver_lock); 2419 2420 first_if = usb_ifnum_to_if(usbdev, 0); 2421 first_if_ctx = usb_get_intfdata(first_if); 2422 2423 if (ifnum == 0) { 2424 ictx = imon_init_intf0(interface, id); 2425 if (!ictx) { 2426 pr_err("failed to initialize context!\n"); 2427 ret = -ENODEV; 2428 goto fail; 2429 } 2430 2431 } else { 2432 /* this is the secondary interface on the device */ 2433 2434 /* fail early if first intf failed to register */ 2435 if (!first_if_ctx) { 2436 ret = -ENODEV; 2437 goto fail; 2438 } 2439 2440 ictx = imon_init_intf1(interface, first_if_ctx); 2441 if (!ictx) { 2442 pr_err("failed to attach to context!\n"); 2443 ret = -ENODEV; 2444 goto fail; 2445 } 2446 2447 } 2448 2449 usb_set_intfdata(interface, ictx); 2450 2451 if (ifnum == 0) { 2452 mutex_lock(&ictx->lock); 2453 2454 if (product == 0xffdc && ictx->rf_device) { 2455 sysfs_err = sysfs_create_group(&interface->dev.kobj, 2456 &imon_rf_attr_group); 2457 if (sysfs_err) 2458 pr_err("Could not create RF sysfs entries(%d)\n", 2459 sysfs_err); 2460 } 2461 2462 if (ictx->display_supported) 2463 imon_init_display(ictx, interface); 2464 2465 mutex_unlock(&ictx->lock); 2466 } 2467 2468 dev_info(dev, "iMON device (%04x:%04x, intf%d) on " 2469 "usb<%d:%d> initialized\n", vendor, product, ifnum, 2470 usbdev->bus->busnum, usbdev->devnum); 2471 2472 mutex_unlock(&driver_lock); 2473 usb_put_dev(usbdev); 2474 2475 return 0; 2476 2477 fail: 2478 mutex_unlock(&driver_lock); 2479 usb_put_dev(usbdev); 2480 dev_err(dev, "unable to register, err %d\n", ret); 2481 2482 return ret; 2483 } 2484 2485 /** 2486 * Callback function for USB core API: disconnect 2487 */ 2488 static void imon_disconnect(struct usb_interface *interface) 2489 { 2490 struct imon_context *ictx; 2491 struct device *dev; 2492 int ifnum; 2493 2494 /* prevent races with multi-interface device probing and display_open */ 2495 mutex_lock(&driver_lock); 2496 2497 ictx = usb_get_intfdata(interface); 2498 dev = ictx->dev; 2499 ifnum = interface->cur_altsetting->desc.bInterfaceNumber; 2500 2501 /* 2502 * sysfs_remove_group is safe to call even if sysfs_create_group 2503 * hasn't been called 2504 */ 2505 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group); 2506 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group); 2507 2508 usb_set_intfdata(interface, NULL); 2509 2510 /* Abort ongoing write */ 2511 if (ictx->tx.busy) { 2512 usb_kill_urb(ictx->tx_urb); 2513 complete_all(&ictx->tx.finished); 2514 } 2515 2516 if (ifnum == 0) { 2517 ictx->dev_present_intf0 = false; 2518 usb_kill_urb(ictx->rx_urb_intf0); 2519 usb_put_dev(ictx->usbdev_intf0); 2520 input_unregister_device(ictx->idev); 2521 rc_unregister_device(ictx->rdev); 2522 if (ictx->display_supported) { 2523 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2524 usb_deregister_dev(interface, &imon_lcd_class); 2525 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD) 2526 usb_deregister_dev(interface, &imon_vfd_class); 2527 } 2528 } else { 2529 ictx->dev_present_intf1 = false; 2530 usb_kill_urb(ictx->rx_urb_intf1); 2531 usb_put_dev(ictx->usbdev_intf1); 2532 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2533 input_unregister_device(ictx->touch); 2534 del_timer_sync(&ictx->ttimer); 2535 } 2536 } 2537 2538 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) 2539 free_imon_context(ictx); 2540 2541 mutex_unlock(&driver_lock); 2542 2543 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n", 2544 __func__, ifnum); 2545 } 2546 2547 static int imon_suspend(struct usb_interface *intf, pm_message_t message) 2548 { 2549 struct imon_context *ictx = usb_get_intfdata(intf); 2550 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2551 2552 if (ifnum == 0) 2553 usb_kill_urb(ictx->rx_urb_intf0); 2554 else 2555 usb_kill_urb(ictx->rx_urb_intf1); 2556 2557 return 0; 2558 } 2559 2560 static int imon_resume(struct usb_interface *intf) 2561 { 2562 int rc = 0; 2563 struct imon_context *ictx = usb_get_intfdata(intf); 2564 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2565 2566 if (ifnum == 0) { 2567 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2568 usb_rcvintpipe(ictx->usbdev_intf0, 2569 ictx->rx_endpoint_intf0->bEndpointAddress), 2570 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2571 usb_rx_callback_intf0, ictx, 2572 ictx->rx_endpoint_intf0->bInterval); 2573 2574 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 2575 2576 } else { 2577 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2578 usb_rcvintpipe(ictx->usbdev_intf1, 2579 ictx->rx_endpoint_intf1->bEndpointAddress), 2580 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2581 usb_rx_callback_intf1, ictx, 2582 ictx->rx_endpoint_intf1->bInterval); 2583 2584 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 2585 } 2586 2587 return rc; 2588 } 2589 2590 module_usb_driver(imon_driver); 2591