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