1 /* 2 * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD 3 * 4 * Copyright(C) 2010 Jarod Wilson <jarod@wilsonet.com> 5 * Portions based on the original lirc_imon driver, 6 * Copyright(C) 2004 Venky Raju(dev@venky.ws) 7 * 8 * Huge thanks to R. Geoff Newbury for invaluable debugging on the 9 * 0xffdc iMON devices, and for sending me one to hack on, without 10 * which the support for them wouldn't be nearly as good. Thanks 11 * also to the numerous 0xffdc device owners that tested auto-config 12 * support for me and provided debug dumps from their devices. 13 * 14 * imon is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 */ 24 25 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 26 27 #include <linux/errno.h> 28 #include <linux/init.h> 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/slab.h> 32 #include <linux/uaccess.h> 33 #include <linux/ratelimit.h> 34 35 #include <linux/input.h> 36 #include <linux/usb.h> 37 #include <linux/usb/input.h> 38 #include <media/rc-core.h> 39 40 #include <linux/time.h> 41 #include <linux/timer.h> 42 43 #define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>" 44 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display" 45 #define MOD_NAME "imon" 46 #define MOD_VERSION "0.9.4" 47 48 #define DISPLAY_MINOR_BASE 144 49 #define DEVICE_NAME "lcd%d" 50 51 #define BUF_CHUNK_SIZE 8 52 #define BUF_SIZE 128 53 54 #define BIT_DURATION 250 /* each bit received is 250us */ 55 56 #define IMON_CLOCK_ENABLE_PACKETS 2 57 58 /*** P R O T O T Y P E S ***/ 59 60 /* USB Callback prototypes */ 61 static int imon_probe(struct usb_interface *interface, 62 const struct usb_device_id *id); 63 static void imon_disconnect(struct usb_interface *interface); 64 static void usb_rx_callback_intf0(struct urb *urb); 65 static void usb_rx_callback_intf1(struct urb *urb); 66 static void usb_tx_callback(struct urb *urb); 67 68 /* suspend/resume support */ 69 static int imon_resume(struct usb_interface *intf); 70 static int imon_suspend(struct usb_interface *intf, pm_message_t message); 71 72 /* Display file_operations function prototypes */ 73 static int display_open(struct inode *inode, struct file *file); 74 static int display_close(struct inode *inode, struct file *file); 75 76 /* VFD write operation */ 77 static ssize_t vfd_write(struct file *file, const char __user *buf, 78 size_t n_bytes, loff_t *pos); 79 80 /* LCD file_operations override function prototypes */ 81 static ssize_t lcd_write(struct file *file, const char __user *buf, 82 size_t n_bytes, loff_t *pos); 83 84 /*** G L O B A L S ***/ 85 86 struct imon_panel_key_table { 87 u64 hw_code; 88 u32 keycode; 89 }; 90 91 struct imon_usb_dev_descr { 92 __u16 flags; 93 #define IMON_NO_FLAGS 0 94 #define IMON_NEED_20MS_PKT_DELAY 1 95 #define IMON_IR_RAW 2 96 struct imon_panel_key_table key_table[]; 97 }; 98 99 struct imon_context { 100 struct device *dev; 101 /* Newer devices have two interfaces */ 102 struct usb_device *usbdev_intf0; 103 struct usb_device *usbdev_intf1; 104 105 bool display_supported; /* not all controllers do */ 106 bool display_isopen; /* display port has been opened */ 107 bool rf_device; /* true if iMON 2.4G LT/DT RF device */ 108 bool rf_isassociating; /* RF remote associating */ 109 bool dev_present_intf0; /* USB device presence, interface 0 */ 110 bool dev_present_intf1; /* USB device presence, interface 1 */ 111 112 struct mutex lock; /* to lock this object */ 113 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */ 114 115 struct usb_endpoint_descriptor *rx_endpoint_intf0; 116 struct usb_endpoint_descriptor *rx_endpoint_intf1; 117 struct usb_endpoint_descriptor *tx_endpoint; 118 struct urb *rx_urb_intf0; 119 struct urb *rx_urb_intf1; 120 struct urb *tx_urb; 121 bool tx_control; 122 unsigned char usb_rx_buf[8]; 123 unsigned char usb_tx_buf[8]; 124 unsigned int send_packet_delay; 125 126 struct rx_data { 127 int count; /* length of 0 or 1 sequence */ 128 int prev_bit; /* logic level of sequence */ 129 int initial_space; /* initial space flag */ 130 } rx; 131 132 struct tx_t { 133 unsigned char data_buf[35]; /* user data buffer */ 134 struct completion finished; /* wait for write to finish */ 135 bool busy; /* write in progress */ 136 int status; /* status of tx completion */ 137 } tx; 138 139 u16 vendor; /* usb vendor ID */ 140 u16 product; /* usb product ID */ 141 142 struct rc_dev *rdev; /* rc-core device for remote */ 143 struct input_dev *idev; /* input device for panel & IR mouse */ 144 struct input_dev *touch; /* input device for touchscreen */ 145 146 spinlock_t kc_lock; /* make sure we get keycodes right */ 147 u32 kc; /* current input keycode */ 148 u32 last_keycode; /* last reported input keycode */ 149 u32 rc_scancode; /* the computed remote scancode */ 150 u8 rc_toggle; /* the computed remote toggle bit */ 151 u64 rc_proto; /* iMON or MCE (RC6) IR protocol? */ 152 bool release_code; /* some keys send a release code */ 153 154 u8 display_type; /* store the display type */ 155 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */ 156 157 char name_rdev[128]; /* rc input device name */ 158 char phys_rdev[64]; /* rc input device phys path */ 159 160 char name_idev[128]; /* input device name */ 161 char phys_idev[64]; /* input device phys path */ 162 163 char name_touch[128]; /* touch screen name */ 164 char phys_touch[64]; /* touch screen phys path */ 165 struct timer_list ttimer; /* touch screen timer */ 166 int touch_x; /* x coordinate on touchscreen */ 167 int touch_y; /* y coordinate on touchscreen */ 168 struct imon_usb_dev_descr *dev_descr; /* device description with key 169 table for front panels */ 170 }; 171 172 #define TOUCH_TIMEOUT (HZ/30) 173 174 /* vfd character device file operations */ 175 static const struct file_operations vfd_fops = { 176 .owner = THIS_MODULE, 177 .open = &display_open, 178 .write = &vfd_write, 179 .release = &display_close, 180 .llseek = noop_llseek, 181 }; 182 183 /* lcd character device file operations */ 184 static const struct file_operations lcd_fops = { 185 .owner = THIS_MODULE, 186 .open = &display_open, 187 .write = &lcd_write, 188 .release = &display_close, 189 .llseek = noop_llseek, 190 }; 191 192 enum { 193 IMON_DISPLAY_TYPE_AUTO = 0, 194 IMON_DISPLAY_TYPE_VFD = 1, 195 IMON_DISPLAY_TYPE_LCD = 2, 196 IMON_DISPLAY_TYPE_VGA = 3, 197 IMON_DISPLAY_TYPE_NONE = 4, 198 }; 199 200 enum { 201 IMON_KEY_IMON = 0, 202 IMON_KEY_MCE = 1, 203 IMON_KEY_PANEL = 2, 204 }; 205 206 static struct usb_class_driver imon_vfd_class = { 207 .name = DEVICE_NAME, 208 .fops = &vfd_fops, 209 .minor_base = DISPLAY_MINOR_BASE, 210 }; 211 212 static struct usb_class_driver imon_lcd_class = { 213 .name = DEVICE_NAME, 214 .fops = &lcd_fops, 215 .minor_base = DISPLAY_MINOR_BASE, 216 }; 217 218 /* imon receiver front panel/knob key table */ 219 static const struct imon_usb_dev_descr imon_default_table = { 220 .flags = IMON_NO_FLAGS, 221 .key_table = { 222 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 223 { 0x000000001200ffeell, KEY_UP }, 224 { 0x000000001300ffeell, KEY_DOWN }, 225 { 0x000000001400ffeell, KEY_LEFT }, 226 { 0x000000001500ffeell, KEY_RIGHT }, 227 { 0x000000001600ffeell, KEY_ENTER }, 228 { 0x000000001700ffeell, KEY_ESC }, 229 { 0x000000001f00ffeell, KEY_AUDIO }, 230 { 0x000000002000ffeell, KEY_VIDEO }, 231 { 0x000000002100ffeell, KEY_CAMERA }, 232 { 0x000000002700ffeell, KEY_DVD }, 233 { 0x000000002300ffeell, KEY_TV }, 234 { 0x000000002b00ffeell, KEY_EXIT }, 235 { 0x000000002c00ffeell, KEY_SELECT }, 236 { 0x000000002d00ffeell, KEY_MENU }, 237 { 0x000000000500ffeell, KEY_PREVIOUS }, 238 { 0x000000000700ffeell, KEY_REWIND }, 239 { 0x000000000400ffeell, KEY_STOP }, 240 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 241 { 0x000000000800ffeell, KEY_FASTFORWARD }, 242 { 0x000000000600ffeell, KEY_NEXT }, 243 { 0x000000010000ffeell, KEY_RIGHT }, 244 { 0x000001000000ffeell, KEY_LEFT }, 245 { 0x000000003d00ffeell, KEY_SELECT }, 246 { 0x000100000000ffeell, KEY_VOLUMEUP }, 247 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 248 { 0x000000000100ffeell, KEY_MUTE }, 249 /* 0xffdc iMON MCE VFD */ 250 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 251 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 252 { 0x00000001ffffffeell, KEY_MUTE }, 253 { 0x0000000fffffffeell, KEY_MEDIA }, 254 { 0x00000012ffffffeell, KEY_UP }, 255 { 0x00000013ffffffeell, KEY_DOWN }, 256 { 0x00000014ffffffeell, KEY_LEFT }, 257 { 0x00000015ffffffeell, KEY_RIGHT }, 258 { 0x00000016ffffffeell, KEY_ENTER }, 259 { 0x00000017ffffffeell, KEY_ESC }, 260 /* iMON Knob values */ 261 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 262 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 263 { 0x000008ffffffffeell, KEY_MUTE }, 264 { 0, KEY_RESERVED }, 265 } 266 }; 267 268 static const struct imon_usb_dev_descr imon_OEM_VFD = { 269 .flags = IMON_NEED_20MS_PKT_DELAY, 270 .key_table = { 271 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 272 { 0x000000001200ffeell, KEY_UP }, 273 { 0x000000001300ffeell, KEY_DOWN }, 274 { 0x000000001400ffeell, KEY_LEFT }, 275 { 0x000000001500ffeell, KEY_RIGHT }, 276 { 0x000000001600ffeell, KEY_ENTER }, 277 { 0x000000001700ffeell, KEY_ESC }, 278 { 0x000000001f00ffeell, KEY_AUDIO }, 279 { 0x000000002b00ffeell, KEY_EXIT }, 280 { 0x000000002c00ffeell, KEY_SELECT }, 281 { 0x000000002d00ffeell, KEY_MENU }, 282 { 0x000000000500ffeell, KEY_PREVIOUS }, 283 { 0x000000000700ffeell, KEY_REWIND }, 284 { 0x000000000400ffeell, KEY_STOP }, 285 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 286 { 0x000000000800ffeell, KEY_FASTFORWARD }, 287 { 0x000000000600ffeell, KEY_NEXT }, 288 { 0x000000010000ffeell, KEY_RIGHT }, 289 { 0x000001000000ffeell, KEY_LEFT }, 290 { 0x000000003d00ffeell, KEY_SELECT }, 291 { 0x000100000000ffeell, KEY_VOLUMEUP }, 292 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 293 { 0x000000000100ffeell, KEY_MUTE }, 294 /* 0xffdc iMON MCE VFD */ 295 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 296 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 297 { 0x00000001ffffffeell, KEY_MUTE }, 298 { 0x0000000fffffffeell, KEY_MEDIA }, 299 { 0x00000012ffffffeell, KEY_UP }, 300 { 0x00000013ffffffeell, KEY_DOWN }, 301 { 0x00000014ffffffeell, KEY_LEFT }, 302 { 0x00000015ffffffeell, KEY_RIGHT }, 303 { 0x00000016ffffffeell, KEY_ENTER }, 304 { 0x00000017ffffffeell, KEY_ESC }, 305 /* iMON Knob values */ 306 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 307 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 308 { 0x000008ffffffffeell, KEY_MUTE }, 309 { 0, KEY_RESERVED }, 310 } 311 }; 312 313 /* imon receiver front panel/knob key table for DH102*/ 314 static const struct imon_usb_dev_descr imon_DH102 = { 315 .flags = IMON_NO_FLAGS, 316 .key_table = { 317 { 0x000100000000ffeell, KEY_VOLUMEUP }, 318 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 319 { 0x000000010000ffeell, KEY_MUTE }, 320 { 0x0000000f0000ffeell, KEY_MEDIA }, 321 { 0x000000120000ffeell, KEY_UP }, 322 { 0x000000130000ffeell, KEY_DOWN }, 323 { 0x000000140000ffeell, KEY_LEFT }, 324 { 0x000000150000ffeell, KEY_RIGHT }, 325 { 0x000000160000ffeell, KEY_ENTER }, 326 { 0x000000170000ffeell, KEY_ESC }, 327 { 0x0000002b0000ffeell, KEY_EXIT }, 328 { 0x0000002c0000ffeell, KEY_SELECT }, 329 { 0x0000002d0000ffeell, KEY_MENU }, 330 { 0, KEY_RESERVED } 331 } 332 }; 333 334 static const struct imon_usb_dev_descr imon_ir_raw = { 335 .flags = IMON_IR_RAW, 336 }; 337 338 /* 339 * USB Device ID for iMON USB Control Boards 340 * 341 * The Windows drivers contain 6 different inf files, more or less one for 342 * each new device until the 0x0034-0x0046 devices, which all use the same 343 * driver. Some of the devices in the 34-46 range haven't been definitively 344 * identified yet. Early devices have either a TriGem Computer, Inc. or a 345 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later 346 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports 347 * the ffdc and later devices, which do onboard decoding. 348 */ 349 static const struct usb_device_id imon_usb_id_table[] = { 350 /* 351 * Several devices with this same device ID, all use iMON_PAD.inf 352 * SoundGraph iMON PAD (IR & VFD) 353 * SoundGraph iMON PAD (IR & LCD) 354 * SoundGraph iMON Knob (IR only) 355 */ 356 { USB_DEVICE(0x15c2, 0xffdc), 357 .driver_info = (unsigned long)&imon_default_table }, 358 359 /* 360 * Newer devices, all driven by the latest iMON Windows driver, full 361 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2' 362 * Need user input to fill in details on unknown devices. 363 */ 364 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */ 365 { USB_DEVICE(0x15c2, 0x0034), 366 .driver_info = (unsigned long)&imon_DH102 }, 367 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */ 368 { USB_DEVICE(0x15c2, 0x0035), 369 .driver_info = (unsigned long)&imon_default_table}, 370 /* SoundGraph iMON OEM VFD (IR & VFD) */ 371 { USB_DEVICE(0x15c2, 0x0036), 372 .driver_info = (unsigned long)&imon_OEM_VFD }, 373 /* device specifics unknown */ 374 { USB_DEVICE(0x15c2, 0x0037), 375 .driver_info = (unsigned long)&imon_default_table}, 376 /* SoundGraph iMON OEM LCD (IR & LCD) */ 377 { USB_DEVICE(0x15c2, 0x0038), 378 .driver_info = (unsigned long)&imon_default_table}, 379 /* SoundGraph iMON UltraBay (IR & LCD) */ 380 { USB_DEVICE(0x15c2, 0x0039), 381 .driver_info = (unsigned long)&imon_default_table}, 382 /* device specifics unknown */ 383 { USB_DEVICE(0x15c2, 0x003a), 384 .driver_info = (unsigned long)&imon_default_table}, 385 /* device specifics unknown */ 386 { USB_DEVICE(0x15c2, 0x003b), 387 .driver_info = (unsigned long)&imon_default_table}, 388 /* SoundGraph iMON OEM Inside (IR only) */ 389 { USB_DEVICE(0x15c2, 0x003c), 390 .driver_info = (unsigned long)&imon_default_table}, 391 /* device specifics unknown */ 392 { USB_DEVICE(0x15c2, 0x003d), 393 .driver_info = (unsigned long)&imon_default_table}, 394 /* device specifics unknown */ 395 { USB_DEVICE(0x15c2, 0x003e), 396 .driver_info = (unsigned long)&imon_default_table}, 397 /* device specifics unknown */ 398 { USB_DEVICE(0x15c2, 0x003f), 399 .driver_info = (unsigned long)&imon_default_table}, 400 /* device specifics unknown */ 401 { USB_DEVICE(0x15c2, 0x0040), 402 .driver_info = (unsigned long)&imon_default_table}, 403 /* SoundGraph iMON MINI (IR only) */ 404 { USB_DEVICE(0x15c2, 0x0041), 405 .driver_info = (unsigned long)&imon_default_table}, 406 /* Antec Veris Multimedia Station EZ External (IR only) */ 407 { USB_DEVICE(0x15c2, 0x0042), 408 .driver_info = (unsigned long)&imon_default_table}, 409 /* Antec Veris Multimedia Station Basic Internal (IR only) */ 410 { USB_DEVICE(0x15c2, 0x0043), 411 .driver_info = (unsigned long)&imon_default_table}, 412 /* Antec Veris Multimedia Station Elite (IR & VFD) */ 413 { USB_DEVICE(0x15c2, 0x0044), 414 .driver_info = (unsigned long)&imon_default_table}, 415 /* Antec Veris Multimedia Station Premiere (IR & LCD) */ 416 { USB_DEVICE(0x15c2, 0x0045), 417 .driver_info = (unsigned long)&imon_default_table}, 418 /* device specifics unknown */ 419 { USB_DEVICE(0x15c2, 0x0046), 420 .driver_info = (unsigned long)&imon_default_table}, 421 /* TriGem iMON (IR only) -- TG_iMON.inf */ 422 { USB_DEVICE(0x0aa8, 0x8001), 423 .driver_info = (unsigned long)&imon_ir_raw}, 424 /* SoundGraph iMON (IR only) -- sg_imon.inf */ 425 { USB_DEVICE(0x04e8, 0xff30), 426 .driver_info = (unsigned long)&imon_ir_raw}, 427 /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */ 428 { USB_DEVICE(0x0aa8, 0xffda), 429 .driver_info = (unsigned long)&imon_ir_raw}, 430 /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */ 431 { USB_DEVICE(0x15c2, 0xffda), 432 .driver_info = (unsigned long)&imon_ir_raw}, 433 {} 434 }; 435 436 /* USB Device data */ 437 static struct usb_driver imon_driver = { 438 .name = MOD_NAME, 439 .probe = imon_probe, 440 .disconnect = imon_disconnect, 441 .suspend = imon_suspend, 442 .resume = imon_resume, 443 .id_table = imon_usb_id_table, 444 }; 445 446 /* to prevent races between open() and disconnect(), probing, etc */ 447 static DEFINE_MUTEX(driver_lock); 448 449 /* Module bookkeeping bits */ 450 MODULE_AUTHOR(MOD_AUTHOR); 451 MODULE_DESCRIPTION(MOD_DESC); 452 MODULE_VERSION(MOD_VERSION); 453 MODULE_LICENSE("GPL"); 454 MODULE_DEVICE_TABLE(usb, imon_usb_id_table); 455 456 static bool debug; 457 module_param(debug, bool, S_IRUGO | S_IWUSR); 458 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)"); 459 460 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */ 461 static int display_type; 462 module_param(display_type, int, S_IRUGO); 463 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)"); 464 465 static int pad_stabilize = 1; 466 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR); 467 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD presses in arrow key mode. 0=disable, 1=enable (default)."); 468 469 /* 470 * In certain use cases, mouse mode isn't really helpful, and could actually 471 * cause confusion, so allow disabling it when the IR device is open. 472 */ 473 static bool nomouse; 474 module_param(nomouse, bool, S_IRUGO | S_IWUSR); 475 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is open. 0=don't disable, 1=disable. (default: don't disable)"); 476 477 /* threshold at which a pad push registers as an arrow key in kbd mode */ 478 static int pad_thresh; 479 module_param(pad_thresh, int, S_IRUGO | S_IWUSR); 480 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)"); 481 482 483 static void free_imon_context(struct imon_context *ictx) 484 { 485 struct device *dev = ictx->dev; 486 487 usb_free_urb(ictx->tx_urb); 488 usb_free_urb(ictx->rx_urb_intf0); 489 usb_free_urb(ictx->rx_urb_intf1); 490 kfree(ictx); 491 492 dev_dbg(dev, "%s: iMON context freed\n", __func__); 493 } 494 495 /* 496 * Called when the Display device (e.g. /dev/lcd0) 497 * is opened by the application. 498 */ 499 static int display_open(struct inode *inode, struct file *file) 500 { 501 struct usb_interface *interface; 502 struct imon_context *ictx = NULL; 503 int subminor; 504 int retval = 0; 505 506 /* prevent races with disconnect */ 507 mutex_lock(&driver_lock); 508 509 subminor = iminor(inode); 510 interface = usb_find_interface(&imon_driver, subminor); 511 if (!interface) { 512 pr_err("could not find interface for minor %d\n", subminor); 513 retval = -ENODEV; 514 goto exit; 515 } 516 ictx = usb_get_intfdata(interface); 517 518 if (!ictx) { 519 pr_err("no context found for minor %d\n", subminor); 520 retval = -ENODEV; 521 goto exit; 522 } 523 524 mutex_lock(&ictx->lock); 525 526 if (!ictx->display_supported) { 527 pr_err("display not supported by device\n"); 528 retval = -ENODEV; 529 } else if (ictx->display_isopen) { 530 pr_err("display port is already open\n"); 531 retval = -EBUSY; 532 } else { 533 ictx->display_isopen = true; 534 file->private_data = ictx; 535 dev_dbg(ictx->dev, "display port opened\n"); 536 } 537 538 mutex_unlock(&ictx->lock); 539 540 exit: 541 mutex_unlock(&driver_lock); 542 return retval; 543 } 544 545 /* 546 * Called when the display device (e.g. /dev/lcd0) 547 * is closed by the application. 548 */ 549 static int display_close(struct inode *inode, struct file *file) 550 { 551 struct imon_context *ictx = NULL; 552 int retval = 0; 553 554 ictx = file->private_data; 555 556 if (!ictx) { 557 pr_err("no context for device\n"); 558 return -ENODEV; 559 } 560 561 mutex_lock(&ictx->lock); 562 563 if (!ictx->display_supported) { 564 pr_err("display not supported by device\n"); 565 retval = -ENODEV; 566 } else if (!ictx->display_isopen) { 567 pr_err("display is not open\n"); 568 retval = -EIO; 569 } else { 570 ictx->display_isopen = false; 571 dev_dbg(ictx->dev, "display port closed\n"); 572 } 573 574 mutex_unlock(&ictx->lock); 575 return retval; 576 } 577 578 /* 579 * Sends a packet to the device -- this function must be called with 580 * ictx->lock held, or its unlock/lock sequence while waiting for tx 581 * to complete can/will lead to a deadlock. 582 */ 583 static int send_packet(struct imon_context *ictx) 584 { 585 unsigned int pipe; 586 unsigned long timeout; 587 int interval = 0; 588 int retval = 0; 589 struct usb_ctrlrequest *control_req = NULL; 590 591 /* Check if we need to use control or interrupt urb */ 592 if (!ictx->tx_control) { 593 pipe = usb_sndintpipe(ictx->usbdev_intf0, 594 ictx->tx_endpoint->bEndpointAddress); 595 interval = ictx->tx_endpoint->bInterval; 596 597 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe, 598 ictx->usb_tx_buf, 599 sizeof(ictx->usb_tx_buf), 600 usb_tx_callback, ictx, interval); 601 602 ictx->tx_urb->actual_length = 0; 603 } else { 604 /* fill request into kmalloc'ed space: */ 605 control_req = kmalloc(sizeof(*control_req), GFP_KERNEL); 606 if (control_req == NULL) 607 return -ENOMEM; 608 609 /* setup packet is '21 09 0200 0001 0008' */ 610 control_req->bRequestType = 0x21; 611 control_req->bRequest = 0x09; 612 control_req->wValue = cpu_to_le16(0x0200); 613 control_req->wIndex = cpu_to_le16(0x0001); 614 control_req->wLength = cpu_to_le16(0x0008); 615 616 /* control pipe is endpoint 0x00 */ 617 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0); 618 619 /* build the control urb */ 620 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0, 621 pipe, (unsigned char *)control_req, 622 ictx->usb_tx_buf, 623 sizeof(ictx->usb_tx_buf), 624 usb_tx_callback, ictx); 625 ictx->tx_urb->actual_length = 0; 626 } 627 628 reinit_completion(&ictx->tx.finished); 629 ictx->tx.busy = true; 630 smp_rmb(); /* ensure later readers know we're busy */ 631 632 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL); 633 if (retval) { 634 ictx->tx.busy = false; 635 smp_rmb(); /* ensure later readers know we're not busy */ 636 pr_err_ratelimited("error submitting urb(%d)\n", retval); 637 } else { 638 /* Wait for transmission to complete (or abort) */ 639 mutex_unlock(&ictx->lock); 640 retval = wait_for_completion_interruptible( 641 &ictx->tx.finished); 642 if (retval) { 643 usb_kill_urb(ictx->tx_urb); 644 pr_err_ratelimited("task interrupted\n"); 645 } 646 mutex_lock(&ictx->lock); 647 648 retval = ictx->tx.status; 649 if (retval) 650 pr_err_ratelimited("packet tx failed (%d)\n", retval); 651 } 652 653 kfree(control_req); 654 655 /* 656 * Induce a mandatory delay before returning, as otherwise, 657 * send_packet can get called so rapidly as to overwhelm the device, 658 * particularly on faster systems and/or those with quirky usb. 659 */ 660 timeout = msecs_to_jiffies(ictx->send_packet_delay); 661 set_current_state(TASK_INTERRUPTIBLE); 662 schedule_timeout(timeout); 663 664 return retval; 665 } 666 667 /* 668 * Sends an associate packet to the iMON 2.4G. 669 * 670 * This might not be such a good idea, since it has an id collision with 671 * some versions of the "IR & VFD" combo. The only way to determine if it 672 * is an RF version is to look at the product description string. (Which 673 * we currently do not fetch). 674 */ 675 static int send_associate_24g(struct imon_context *ictx) 676 { 677 int retval; 678 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00, 679 0x00, 0x00, 0x00, 0x20 }; 680 681 if (!ictx) { 682 pr_err("no context for device\n"); 683 return -ENODEV; 684 } 685 686 if (!ictx->dev_present_intf0) { 687 pr_err("no iMON device present\n"); 688 return -ENODEV; 689 } 690 691 memcpy(ictx->usb_tx_buf, packet, sizeof(packet)); 692 retval = send_packet(ictx); 693 694 return retval; 695 } 696 697 /* 698 * Sends packets to setup and show clock on iMON display 699 * 700 * Arguments: year - last 2 digits of year, month - 1..12, 701 * day - 1..31, dow - day of the week (0-Sun...6-Sat), 702 * hour - 0..23, minute - 0..59, second - 0..59 703 */ 704 static int send_set_imon_clock(struct imon_context *ictx, 705 unsigned int year, unsigned int month, 706 unsigned int day, unsigned int dow, 707 unsigned int hour, unsigned int minute, 708 unsigned int second) 709 { 710 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8]; 711 int retval = 0; 712 int i; 713 714 if (!ictx) { 715 pr_err("no context for device\n"); 716 return -ENODEV; 717 } 718 719 switch (ictx->display_type) { 720 case IMON_DISPLAY_TYPE_LCD: 721 clock_enable_pkt[0][0] = 0x80; 722 clock_enable_pkt[0][1] = year; 723 clock_enable_pkt[0][2] = month-1; 724 clock_enable_pkt[0][3] = day; 725 clock_enable_pkt[0][4] = hour; 726 clock_enable_pkt[0][5] = minute; 727 clock_enable_pkt[0][6] = second; 728 729 clock_enable_pkt[1][0] = 0x80; 730 clock_enable_pkt[1][1] = 0; 731 clock_enable_pkt[1][2] = 0; 732 clock_enable_pkt[1][3] = 0; 733 clock_enable_pkt[1][4] = 0; 734 clock_enable_pkt[1][5] = 0; 735 clock_enable_pkt[1][6] = 0; 736 737 if (ictx->product == 0xffdc) { 738 clock_enable_pkt[0][7] = 0x50; 739 clock_enable_pkt[1][7] = 0x51; 740 } else { 741 clock_enable_pkt[0][7] = 0x88; 742 clock_enable_pkt[1][7] = 0x8a; 743 } 744 745 break; 746 747 case IMON_DISPLAY_TYPE_VFD: 748 clock_enable_pkt[0][0] = year; 749 clock_enable_pkt[0][1] = month-1; 750 clock_enable_pkt[0][2] = day; 751 clock_enable_pkt[0][3] = dow; 752 clock_enable_pkt[0][4] = hour; 753 clock_enable_pkt[0][5] = minute; 754 clock_enable_pkt[0][6] = second; 755 clock_enable_pkt[0][7] = 0x40; 756 757 clock_enable_pkt[1][0] = 0; 758 clock_enable_pkt[1][1] = 0; 759 clock_enable_pkt[1][2] = 1; 760 clock_enable_pkt[1][3] = 0; 761 clock_enable_pkt[1][4] = 0; 762 clock_enable_pkt[1][5] = 0; 763 clock_enable_pkt[1][6] = 0; 764 clock_enable_pkt[1][7] = 0x42; 765 766 break; 767 768 default: 769 return -ENODEV; 770 } 771 772 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) { 773 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8); 774 retval = send_packet(ictx); 775 if (retval) { 776 pr_err("send_packet failed for packet %d\n", i); 777 break; 778 } 779 } 780 781 return retval; 782 } 783 784 /* 785 * These are the sysfs functions to handle the association on the iMON 2.4G LT. 786 */ 787 static ssize_t show_associate_remote(struct device *d, 788 struct device_attribute *attr, 789 char *buf) 790 { 791 struct imon_context *ictx = dev_get_drvdata(d); 792 793 if (!ictx) 794 return -ENODEV; 795 796 mutex_lock(&ictx->lock); 797 if (ictx->rf_isassociating) 798 strcpy(buf, "associating\n"); 799 else 800 strcpy(buf, "closed\n"); 801 802 dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for instructions on how to associate your iMON 2.4G DT/LT remote\n"); 803 mutex_unlock(&ictx->lock); 804 return strlen(buf); 805 } 806 807 static ssize_t store_associate_remote(struct device *d, 808 struct device_attribute *attr, 809 const char *buf, size_t count) 810 { 811 struct imon_context *ictx; 812 813 ictx = dev_get_drvdata(d); 814 815 if (!ictx) 816 return -ENODEV; 817 818 mutex_lock(&ictx->lock); 819 ictx->rf_isassociating = true; 820 send_associate_24g(ictx); 821 mutex_unlock(&ictx->lock); 822 823 return count; 824 } 825 826 /* 827 * sysfs functions to control internal imon clock 828 */ 829 static ssize_t show_imon_clock(struct device *d, 830 struct device_attribute *attr, char *buf) 831 { 832 struct imon_context *ictx = dev_get_drvdata(d); 833 size_t len; 834 835 if (!ictx) 836 return -ENODEV; 837 838 mutex_lock(&ictx->lock); 839 840 if (!ictx->display_supported) { 841 len = snprintf(buf, PAGE_SIZE, "Not supported."); 842 } else { 843 len = snprintf(buf, PAGE_SIZE, 844 "To set the clock on your iMON display:\n" 845 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n" 846 "%s", ictx->display_isopen ? 847 "\nNOTE: imon device must be closed\n" : ""); 848 } 849 850 mutex_unlock(&ictx->lock); 851 852 return len; 853 } 854 855 static ssize_t store_imon_clock(struct device *d, 856 struct device_attribute *attr, 857 const char *buf, size_t count) 858 { 859 struct imon_context *ictx = dev_get_drvdata(d); 860 ssize_t retval; 861 unsigned int year, month, day, dow, hour, minute, second; 862 863 if (!ictx) 864 return -ENODEV; 865 866 mutex_lock(&ictx->lock); 867 868 if (!ictx->display_supported) { 869 retval = -ENODEV; 870 goto exit; 871 } else if (ictx->display_isopen) { 872 retval = -EBUSY; 873 goto exit; 874 } 875 876 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow, 877 &hour, &minute, &second) != 7) { 878 retval = -EINVAL; 879 goto exit; 880 } 881 882 if ((month < 1 || month > 12) || 883 (day < 1 || day > 31) || (dow > 6) || 884 (hour > 23) || (minute > 59) || (second > 59)) { 885 retval = -EINVAL; 886 goto exit; 887 } 888 889 retval = send_set_imon_clock(ictx, year, month, day, dow, 890 hour, minute, second); 891 if (retval) 892 goto exit; 893 894 retval = count; 895 exit: 896 mutex_unlock(&ictx->lock); 897 898 return retval; 899 } 900 901 902 static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock, 903 store_imon_clock); 904 905 static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote, 906 store_associate_remote); 907 908 static struct attribute *imon_display_sysfs_entries[] = { 909 &dev_attr_imon_clock.attr, 910 NULL 911 }; 912 913 static const struct attribute_group imon_display_attr_group = { 914 .attrs = imon_display_sysfs_entries 915 }; 916 917 static struct attribute *imon_rf_sysfs_entries[] = { 918 &dev_attr_associate_remote.attr, 919 NULL 920 }; 921 922 static const struct attribute_group imon_rf_attr_group = { 923 .attrs = imon_rf_sysfs_entries 924 }; 925 926 /* 927 * Writes data to the VFD. The iMON VFD is 2x16 characters 928 * and requires data in 5 consecutive USB interrupt packets, 929 * each packet but the last carrying 7 bytes. 930 * 931 * I don't know if the VFD board supports features such as 932 * scrolling, clearing rows, blanking, etc. so at 933 * the caller must provide a full screen of data. If fewer 934 * than 32 bytes are provided spaces will be appended to 935 * generate a full screen. 936 */ 937 static ssize_t vfd_write(struct file *file, const char __user *buf, 938 size_t n_bytes, loff_t *pos) 939 { 940 int i; 941 int offset; 942 int seq; 943 int retval = 0; 944 struct imon_context *ictx; 945 static const unsigned char vfd_packet6[] = { 946 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; 947 948 ictx = file->private_data; 949 if (!ictx) { 950 pr_err_ratelimited("no context for device\n"); 951 return -ENODEV; 952 } 953 954 mutex_lock(&ictx->lock); 955 956 if (!ictx->dev_present_intf0) { 957 pr_err_ratelimited("no iMON device present\n"); 958 retval = -ENODEV; 959 goto exit; 960 } 961 962 if (n_bytes <= 0 || n_bytes > 32) { 963 pr_err_ratelimited("invalid payload size\n"); 964 retval = -EINVAL; 965 goto exit; 966 } 967 968 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) { 969 retval = -EFAULT; 970 goto exit; 971 } 972 973 /* Pad with spaces */ 974 for (i = n_bytes; i < 32; ++i) 975 ictx->tx.data_buf[i] = ' '; 976 977 for (i = 32; i < 35; ++i) 978 ictx->tx.data_buf[i] = 0xFF; 979 980 offset = 0; 981 seq = 0; 982 983 do { 984 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7); 985 ictx->usb_tx_buf[7] = (unsigned char) seq; 986 987 retval = send_packet(ictx); 988 if (retval) { 989 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 990 goto exit; 991 } else { 992 seq += 2; 993 offset += 7; 994 } 995 996 } while (offset < 35); 997 998 /* Send packet #6 */ 999 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); 1000 ictx->usb_tx_buf[7] = (unsigned char) seq; 1001 retval = send_packet(ictx); 1002 if (retval) 1003 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 1004 1005 exit: 1006 mutex_unlock(&ictx->lock); 1007 1008 return (!retval) ? n_bytes : retval; 1009 } 1010 1011 /* 1012 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte 1013 * packets. We accept data as 16 hexadecimal digits, followed by a 1014 * newline (to make it easy to drive the device from a command-line 1015 * -- even though the actual binary data is a bit complicated). 1016 * 1017 * The device itself is not a "traditional" text-mode display. It's 1018 * actually a 16x96 pixel bitmap display. That means if you want to 1019 * display text, you've got to have your own "font" and translate the 1020 * text into bitmaps for display. This is really flexible (you can 1021 * display whatever diacritics you need, and so on), but it's also 1022 * a lot more complicated than most LCDs... 1023 */ 1024 static ssize_t lcd_write(struct file *file, const char __user *buf, 1025 size_t n_bytes, loff_t *pos) 1026 { 1027 int retval = 0; 1028 struct imon_context *ictx; 1029 1030 ictx = file->private_data; 1031 if (!ictx) { 1032 pr_err_ratelimited("no context for device\n"); 1033 return -ENODEV; 1034 } 1035 1036 mutex_lock(&ictx->lock); 1037 1038 if (!ictx->display_supported) { 1039 pr_err_ratelimited("no iMON display present\n"); 1040 retval = -ENODEV; 1041 goto exit; 1042 } 1043 1044 if (n_bytes != 8) { 1045 pr_err_ratelimited("invalid payload size: %d (expected 8)\n", 1046 (int)n_bytes); 1047 retval = -EINVAL; 1048 goto exit; 1049 } 1050 1051 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) { 1052 retval = -EFAULT; 1053 goto exit; 1054 } 1055 1056 retval = send_packet(ictx); 1057 if (retval) { 1058 pr_err_ratelimited("send packet failed!\n"); 1059 goto exit; 1060 } else { 1061 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n", 1062 __func__, (int) n_bytes); 1063 } 1064 exit: 1065 mutex_unlock(&ictx->lock); 1066 return (!retval) ? n_bytes : retval; 1067 } 1068 1069 /* 1070 * Callback function for USB core API: transmit data 1071 */ 1072 static void usb_tx_callback(struct urb *urb) 1073 { 1074 struct imon_context *ictx; 1075 1076 if (!urb) 1077 return; 1078 ictx = (struct imon_context *)urb->context; 1079 if (!ictx) 1080 return; 1081 1082 ictx->tx.status = urb->status; 1083 1084 /* notify waiters that write has finished */ 1085 ictx->tx.busy = false; 1086 smp_rmb(); /* ensure later readers know we're not busy */ 1087 complete(&ictx->tx.finished); 1088 } 1089 1090 /* 1091 * report touchscreen input 1092 */ 1093 static void imon_touch_display_timeout(struct timer_list *t) 1094 { 1095 struct imon_context *ictx = from_timer(ictx, t, ttimer); 1096 1097 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA) 1098 return; 1099 1100 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1101 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1102 input_report_key(ictx->touch, BTN_TOUCH, 0x00); 1103 input_sync(ictx->touch); 1104 } 1105 1106 /* 1107 * iMON IR receivers support two different signal sets -- those used by 1108 * the iMON remotes, and those used by the Windows MCE remotes (which is 1109 * really just RC-6), but only one or the other at a time, as the signals 1110 * are decoded onboard the receiver. 1111 * 1112 * This function gets called two different ways, one way is from 1113 * rc_register_device, for initial protocol selection/setup, and the other is 1114 * via a userspace-initiated protocol change request, either by direct sysfs 1115 * prodding or by something like ir-keytable. In the rc_register_device case, 1116 * the imon context lock is already held, but when initiated from userspace, 1117 * it is not, so we must acquire it prior to calling send_packet, which 1118 * requires that the lock is held. 1119 */ 1120 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto) 1121 { 1122 int retval; 1123 struct imon_context *ictx = rc->priv; 1124 struct device *dev = ictx->dev; 1125 bool unlock = false; 1126 unsigned char ir_proto_packet[] = { 1127 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 }; 1128 1129 if (*rc_proto && !(*rc_proto & rc->allowed_protocols)) 1130 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n"); 1131 1132 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) { 1133 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n"); 1134 ir_proto_packet[0] = 0x01; 1135 *rc_proto = RC_PROTO_BIT_RC6_MCE; 1136 } else if (*rc_proto & RC_PROTO_BIT_OTHER) { 1137 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n"); 1138 if (!pad_stabilize) 1139 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1140 /* ir_proto_packet[0] = 0x00; // already the default */ 1141 *rc_proto = RC_PROTO_BIT_OTHER; 1142 } else { 1143 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n"); 1144 if (!pad_stabilize) 1145 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1146 /* ir_proto_packet[0] = 0x00; // already the default */ 1147 *rc_proto = RC_PROTO_BIT_OTHER; 1148 } 1149 1150 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet)); 1151 1152 if (!mutex_is_locked(&ictx->lock)) { 1153 unlock = true; 1154 mutex_lock(&ictx->lock); 1155 } 1156 1157 retval = send_packet(ictx); 1158 if (retval) 1159 goto out; 1160 1161 ictx->rc_proto = *rc_proto; 1162 ictx->pad_mouse = false; 1163 1164 out: 1165 if (unlock) 1166 mutex_unlock(&ictx->lock); 1167 1168 return retval; 1169 } 1170 1171 static inline int tv2int(const struct timeval *a, const struct timeval *b) 1172 { 1173 int usecs = 0; 1174 int sec = 0; 1175 1176 if (b->tv_usec > a->tv_usec) { 1177 usecs = 1000000; 1178 sec--; 1179 } 1180 1181 usecs += a->tv_usec - b->tv_usec; 1182 1183 sec += a->tv_sec - b->tv_sec; 1184 sec *= 1000; 1185 usecs /= 1000; 1186 sec += usecs; 1187 1188 if (sec < 0) 1189 sec = 1000; 1190 1191 return sec; 1192 } 1193 1194 /* 1195 * The directional pad behaves a bit differently, depending on whether this is 1196 * one of the older ffdc devices or a newer device. Newer devices appear to 1197 * have a higher resolution matrix for more precise mouse movement, but it 1198 * makes things overly sensitive in keyboard mode, so we do some interesting 1199 * contortions to make it less touchy. Older devices run through the same 1200 * routine with shorter timeout and a smaller threshold. 1201 */ 1202 static int stabilize(int a, int b, u16 timeout, u16 threshold) 1203 { 1204 struct timeval ct; 1205 static struct timeval prev_time = {0, 0}; 1206 static struct timeval hit_time = {0, 0}; 1207 static int x, y, prev_result, hits; 1208 int result = 0; 1209 int msec, msec_hit; 1210 1211 do_gettimeofday(&ct); 1212 msec = tv2int(&ct, &prev_time); 1213 msec_hit = tv2int(&ct, &hit_time); 1214 1215 if (msec > 100) { 1216 x = 0; 1217 y = 0; 1218 hits = 0; 1219 } 1220 1221 x += a; 1222 y += b; 1223 1224 prev_time = ct; 1225 1226 if (abs(x) > threshold || abs(y) > threshold) { 1227 if (abs(y) > abs(x)) 1228 result = (y > 0) ? 0x7F : 0x80; 1229 else 1230 result = (x > 0) ? 0x7F00 : 0x8000; 1231 1232 x = 0; 1233 y = 0; 1234 1235 if (result == prev_result) { 1236 hits++; 1237 1238 if (hits > 3) { 1239 switch (result) { 1240 case 0x7F: 1241 y = 17 * threshold / 30; 1242 break; 1243 case 0x80: 1244 y -= 17 * threshold / 30; 1245 break; 1246 case 0x7F00: 1247 x = 17 * threshold / 30; 1248 break; 1249 case 0x8000: 1250 x -= 17 * threshold / 30; 1251 break; 1252 } 1253 } 1254 1255 if (hits == 2 && msec_hit < timeout) { 1256 result = 0; 1257 hits = 1; 1258 } 1259 } else { 1260 prev_result = result; 1261 hits = 1; 1262 hit_time = ct; 1263 } 1264 } 1265 1266 return result; 1267 } 1268 1269 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode) 1270 { 1271 u32 keycode; 1272 u32 release; 1273 bool is_release_code = false; 1274 1275 /* Look for the initial press of a button */ 1276 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1277 ictx->rc_toggle = 0x0; 1278 ictx->rc_scancode = scancode; 1279 1280 /* Look for the release of a button */ 1281 if (keycode == KEY_RESERVED) { 1282 release = scancode & ~0x4000; 1283 keycode = rc_g_keycode_from_table(ictx->rdev, release); 1284 if (keycode != KEY_RESERVED) 1285 is_release_code = true; 1286 } 1287 1288 ictx->release_code = is_release_code; 1289 1290 return keycode; 1291 } 1292 1293 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode) 1294 { 1295 u32 keycode; 1296 1297 #define MCE_KEY_MASK 0x7000 1298 #define MCE_TOGGLE_BIT 0x8000 1299 1300 /* 1301 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx 1302 * (the toggle bit flipping between alternating key presses), while 1303 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep 1304 * the table trim, we always or in the bits to look up 0x8000ff4xx, 1305 * but we can't or them into all codes, as some keys are decoded in 1306 * a different way w/o the same use of the toggle bit... 1307 */ 1308 if (scancode & 0x80000000) 1309 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT; 1310 1311 ictx->rc_scancode = scancode; 1312 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1313 1314 /* not used in mce mode, but make sure we know its false */ 1315 ictx->release_code = false; 1316 1317 return keycode; 1318 } 1319 1320 static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code) 1321 { 1322 int i; 1323 u32 keycode = KEY_RESERVED; 1324 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table; 1325 1326 for (i = 0; key_table[i].hw_code != 0; i++) { 1327 if (key_table[i].hw_code == (code | 0xffee)) { 1328 keycode = key_table[i].keycode; 1329 break; 1330 } 1331 } 1332 ictx->release_code = false; 1333 return keycode; 1334 } 1335 1336 static bool imon_mouse_event(struct imon_context *ictx, 1337 unsigned char *buf, int len) 1338 { 1339 signed char rel_x = 0x00, rel_y = 0x00; 1340 u8 right_shift = 1; 1341 bool mouse_input = true; 1342 int dir = 0; 1343 unsigned long flags; 1344 1345 spin_lock_irqsave(&ictx->kc_lock, flags); 1346 1347 /* newer iMON device PAD or mouse button */ 1348 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) { 1349 rel_x = buf[2]; 1350 rel_y = buf[3]; 1351 right_shift = 1; 1352 /* 0xffdc iMON PAD or mouse button input */ 1353 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) && 1354 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) { 1355 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1356 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1357 if (buf[0] & 0x02) 1358 rel_x |= ~0x0f; 1359 rel_x = rel_x + rel_x / 2; 1360 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1361 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1362 if (buf[0] & 0x01) 1363 rel_y |= ~0x0f; 1364 rel_y = rel_y + rel_y / 2; 1365 right_shift = 2; 1366 /* some ffdc devices decode mouse buttons differently... */ 1367 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) { 1368 right_shift = 2; 1369 /* ch+/- buttons, which we use for an emulated scroll wheel */ 1370 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) { 1371 dir = 1; 1372 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) { 1373 dir = -1; 1374 } else 1375 mouse_input = false; 1376 1377 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1378 1379 if (mouse_input) { 1380 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n"); 1381 1382 if (dir) { 1383 input_report_rel(ictx->idev, REL_WHEEL, dir); 1384 } else if (rel_x || rel_y) { 1385 input_report_rel(ictx->idev, REL_X, rel_x); 1386 input_report_rel(ictx->idev, REL_Y, rel_y); 1387 } else { 1388 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1); 1389 input_report_key(ictx->idev, BTN_RIGHT, 1390 buf[1] >> right_shift & 0x1); 1391 } 1392 input_sync(ictx->idev); 1393 spin_lock_irqsave(&ictx->kc_lock, flags); 1394 ictx->last_keycode = ictx->kc; 1395 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1396 } 1397 1398 return mouse_input; 1399 } 1400 1401 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf) 1402 { 1403 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT); 1404 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4); 1405 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf)); 1406 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1407 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1408 input_report_key(ictx->touch, BTN_TOUCH, 0x01); 1409 input_sync(ictx->touch); 1410 } 1411 1412 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf) 1413 { 1414 int dir = 0; 1415 signed char rel_x = 0x00, rel_y = 0x00; 1416 u16 timeout, threshold; 1417 u32 scancode = KEY_RESERVED; 1418 unsigned long flags; 1419 1420 /* 1421 * The imon directional pad functions more like a touchpad. Bytes 3 & 4 1422 * contain a position coordinate (x,y), with each component ranging 1423 * from -14 to 14. We want to down-sample this to only 4 discrete values 1424 * for up/down/left/right arrow keys. Also, when you get too close to 1425 * diagonals, it has a tendency to jump back and forth, so lets try to 1426 * ignore when they get too close. 1427 */ 1428 if (ictx->product != 0xffdc) { 1429 /* first, pad to 8 bytes so it conforms with everything else */ 1430 buf[5] = buf[6] = buf[7] = 0; 1431 timeout = 500; /* in msecs */ 1432 /* (2*threshold) x (2*threshold) square */ 1433 threshold = pad_thresh ? pad_thresh : 28; 1434 rel_x = buf[2]; 1435 rel_y = buf[3]; 1436 1437 if (ictx->rc_proto == RC_PROTO_BIT_OTHER && pad_stabilize) { 1438 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) { 1439 dir = stabilize((int)rel_x, (int)rel_y, 1440 timeout, threshold); 1441 if (!dir) { 1442 spin_lock_irqsave(&ictx->kc_lock, 1443 flags); 1444 ictx->kc = KEY_UNKNOWN; 1445 spin_unlock_irqrestore(&ictx->kc_lock, 1446 flags); 1447 return; 1448 } 1449 buf[2] = dir & 0xFF; 1450 buf[3] = (dir >> 8) & 0xFF; 1451 scancode = be32_to_cpu(*((__be32 *)buf)); 1452 } 1453 } else { 1454 /* 1455 * Hack alert: instead of using keycodes, we have 1456 * to use hard-coded scancodes here... 1457 */ 1458 if (abs(rel_y) > abs(rel_x)) { 1459 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1460 buf[3] = 0; 1461 if (rel_y > 0) 1462 scancode = 0x01007f00; /* KEY_DOWN */ 1463 else 1464 scancode = 0x01008000; /* KEY_UP */ 1465 } else { 1466 buf[2] = 0; 1467 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1468 if (rel_x > 0) 1469 scancode = 0x0100007f; /* KEY_RIGHT */ 1470 else 1471 scancode = 0x01000080; /* KEY_LEFT */ 1472 } 1473 } 1474 1475 /* 1476 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad 1477 * device (15c2:ffdc). The remote generates various codes from 1478 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates 1479 * 0x688301b7 and the right one 0x688481b7. All other keys generate 1480 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with 1481 * reversed endianness. Extract direction from buffer, rotate endianness, 1482 * adjust sign and feed the values into stabilize(). The resulting codes 1483 * will be 0x01008000, 0x01007F00, which match the newer devices. 1484 */ 1485 } else { 1486 timeout = 10; /* in msecs */ 1487 /* (2*threshold) x (2*threshold) square */ 1488 threshold = pad_thresh ? pad_thresh : 15; 1489 1490 /* buf[1] is x */ 1491 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1492 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1493 if (buf[0] & 0x02) 1494 rel_x |= ~0x10+1; 1495 /* buf[2] is y */ 1496 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1497 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1498 if (buf[0] & 0x01) 1499 rel_y |= ~0x10+1; 1500 1501 buf[0] = 0x01; 1502 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0; 1503 1504 if (ictx->rc_proto == RC_PROTO_BIT_OTHER && pad_stabilize) { 1505 dir = stabilize((int)rel_x, (int)rel_y, 1506 timeout, threshold); 1507 if (!dir) { 1508 spin_lock_irqsave(&ictx->kc_lock, flags); 1509 ictx->kc = KEY_UNKNOWN; 1510 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1511 return; 1512 } 1513 buf[2] = dir & 0xFF; 1514 buf[3] = (dir >> 8) & 0xFF; 1515 scancode = be32_to_cpu(*((__be32 *)buf)); 1516 } else { 1517 /* 1518 * Hack alert: instead of using keycodes, we have 1519 * to use hard-coded scancodes here... 1520 */ 1521 if (abs(rel_y) > abs(rel_x)) { 1522 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1523 buf[3] = 0; 1524 if (rel_y > 0) 1525 scancode = 0x01007f00; /* KEY_DOWN */ 1526 else 1527 scancode = 0x01008000; /* KEY_UP */ 1528 } else { 1529 buf[2] = 0; 1530 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1531 if (rel_x > 0) 1532 scancode = 0x0100007f; /* KEY_RIGHT */ 1533 else 1534 scancode = 0x01000080; /* KEY_LEFT */ 1535 } 1536 } 1537 } 1538 1539 if (scancode) { 1540 spin_lock_irqsave(&ictx->kc_lock, flags); 1541 ictx->kc = imon_remote_key_lookup(ictx, scancode); 1542 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1543 } 1544 } 1545 1546 /* 1547 * figure out if these is a press or a release. We don't actually 1548 * care about repeats, as those will be auto-generated within the IR 1549 * subsystem for repeating scancodes. 1550 */ 1551 static int imon_parse_press_type(struct imon_context *ictx, 1552 unsigned char *buf, u8 ktype) 1553 { 1554 int press_type = 0; 1555 unsigned long flags; 1556 1557 spin_lock_irqsave(&ictx->kc_lock, flags); 1558 1559 /* key release of 0x02XXXXXX key */ 1560 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00) 1561 ictx->kc = ictx->last_keycode; 1562 1563 /* mouse button release on (some) 0xffdc devices */ 1564 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 && 1565 buf[2] == 0x81 && buf[3] == 0xb7) 1566 ictx->kc = ictx->last_keycode; 1567 1568 /* mouse button release on (some other) 0xffdc devices */ 1569 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 && 1570 buf[2] == 0x81 && buf[3] == 0xb7) 1571 ictx->kc = ictx->last_keycode; 1572 1573 /* mce-specific button handling, no keyup events */ 1574 else if (ktype == IMON_KEY_MCE) { 1575 ictx->rc_toggle = buf[2]; 1576 press_type = 1; 1577 1578 /* incoherent or irrelevant data */ 1579 } else if (ictx->kc == KEY_RESERVED) 1580 press_type = -EINVAL; 1581 1582 /* key release of 0xXXXXXXb7 key */ 1583 else if (ictx->release_code) 1584 press_type = 0; 1585 1586 /* this is a button press */ 1587 else 1588 press_type = 1; 1589 1590 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1591 1592 return press_type; 1593 } 1594 1595 /* 1596 * Process the incoming packet 1597 */ 1598 /* 1599 * Convert bit count to time duration (in us) and submit 1600 * the value to lirc_dev. 1601 */ 1602 static void submit_data(struct imon_context *context) 1603 { 1604 DEFINE_IR_RAW_EVENT(ev); 1605 1606 ev.pulse = context->rx.prev_bit; 1607 ev.duration = US_TO_NS(context->rx.count * BIT_DURATION); 1608 ir_raw_event_store_with_filter(context->rdev, &ev); 1609 } 1610 1611 /* 1612 * Process the incoming packet 1613 */ 1614 static void imon_incoming_ir_raw(struct imon_context *context, 1615 struct urb *urb, int intf) 1616 { 1617 int len = urb->actual_length; 1618 unsigned char *buf = urb->transfer_buffer; 1619 struct device *dev = context->dev; 1620 int octet, bit; 1621 unsigned char mask; 1622 1623 if (len != 8) { 1624 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n", 1625 __func__, len, intf); 1626 return; 1627 } 1628 1629 if (debug) 1630 dev_info(dev, "raw packet: %*ph\n", len, buf); 1631 /* 1632 * Translate received data to pulse and space lengths. 1633 * Received data is active low, i.e. pulses are 0 and 1634 * spaces are 1. 1635 * 1636 * My original algorithm was essentially similar to 1637 * Changwoo Ryu's with the exception that he switched 1638 * the incoming bits to active high and also fed an 1639 * initial space to LIRC at the start of a new sequence 1640 * if the previous bit was a pulse. 1641 * 1642 * I've decided to adopt his algorithm. 1643 */ 1644 1645 if (buf[7] == 1 && context->rx.initial_space) { 1646 /* LIRC requires a leading space */ 1647 context->rx.prev_bit = 0; 1648 context->rx.count = 4; 1649 submit_data(context); 1650 context->rx.count = 0; 1651 } 1652 1653 for (octet = 0; octet < 5; ++octet) { 1654 mask = 0x80; 1655 for (bit = 0; bit < 8; ++bit) { 1656 int curr_bit = !(buf[octet] & mask); 1657 1658 if (curr_bit != context->rx.prev_bit) { 1659 if (context->rx.count) { 1660 submit_data(context); 1661 context->rx.count = 0; 1662 } 1663 context->rx.prev_bit = curr_bit; 1664 } 1665 ++context->rx.count; 1666 mask >>= 1; 1667 } 1668 } 1669 1670 if (buf[7] == 10) { 1671 if (context->rx.count) { 1672 submit_data(context); 1673 context->rx.count = 0; 1674 } 1675 context->rx.initial_space = context->rx.prev_bit; 1676 } 1677 1678 ir_raw_event_handle(context->rdev); 1679 } 1680 1681 static void imon_incoming_scancode(struct imon_context *ictx, 1682 struct urb *urb, int intf) 1683 { 1684 int len = urb->actual_length; 1685 unsigned char *buf = urb->transfer_buffer; 1686 struct device *dev = ictx->dev; 1687 unsigned long flags; 1688 u32 kc; 1689 u64 scancode; 1690 int press_type = 0; 1691 int msec; 1692 struct timeval t; 1693 static struct timeval prev_time = { 0, 0 }; 1694 u8 ktype; 1695 1696 /* filter out junk data on the older 0xffdc imon devices */ 1697 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff)) 1698 return; 1699 1700 /* Figure out what key was pressed */ 1701 if (len == 8 && buf[7] == 0xee) { 1702 scancode = be64_to_cpu(*((__be64 *)buf)); 1703 ktype = IMON_KEY_PANEL; 1704 kc = imon_panel_key_lookup(ictx, scancode); 1705 ictx->release_code = false; 1706 } else { 1707 scancode = be32_to_cpu(*((__be32 *)buf)); 1708 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) { 1709 ktype = IMON_KEY_IMON; 1710 if (buf[0] == 0x80) 1711 ktype = IMON_KEY_MCE; 1712 kc = imon_mce_key_lookup(ictx, scancode); 1713 } else { 1714 ktype = IMON_KEY_IMON; 1715 kc = imon_remote_key_lookup(ictx, scancode); 1716 } 1717 } 1718 1719 spin_lock_irqsave(&ictx->kc_lock, flags); 1720 /* keyboard/mouse mode toggle button */ 1721 if (kc == KEY_KEYBOARD && !ictx->release_code) { 1722 ictx->last_keycode = kc; 1723 if (!nomouse) { 1724 ictx->pad_mouse = !ictx->pad_mouse; 1725 dev_dbg(dev, "toggling to %s mode\n", 1726 ictx->pad_mouse ? "mouse" : "keyboard"); 1727 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1728 return; 1729 } else { 1730 ictx->pad_mouse = false; 1731 dev_dbg(dev, "mouse mode disabled, passing key value\n"); 1732 } 1733 } 1734 1735 ictx->kc = kc; 1736 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1737 1738 /* send touchscreen events through input subsystem if touchpad data */ 1739 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 && 1740 buf[7] == 0x86) { 1741 imon_touch_event(ictx, buf); 1742 return; 1743 1744 /* look for mouse events with pad in mouse mode */ 1745 } else if (ictx->pad_mouse) { 1746 if (imon_mouse_event(ictx, buf, len)) 1747 return; 1748 } 1749 1750 /* Now for some special handling to convert pad input to arrow keys */ 1751 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) || 1752 ((len == 8) && (buf[0] & 0x40) && 1753 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) { 1754 len = 8; 1755 imon_pad_to_keys(ictx, buf); 1756 } 1757 1758 if (debug) { 1759 printk(KERN_INFO "intf%d decoded packet: %*ph\n", 1760 intf, len, buf); 1761 } 1762 1763 press_type = imon_parse_press_type(ictx, buf, ktype); 1764 if (press_type < 0) 1765 goto not_input_data; 1766 1767 if (ktype != IMON_KEY_PANEL) { 1768 if (press_type == 0) 1769 rc_keyup(ictx->rdev); 1770 else { 1771 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE || 1772 ictx->rc_proto == RC_PROTO_BIT_OTHER) 1773 rc_keydown(ictx->rdev, 1774 ictx->rc_proto == RC_PROTO_BIT_RC6_MCE ? RC_PROTO_RC6_MCE : RC_PROTO_OTHER, 1775 ictx->rc_scancode, ictx->rc_toggle); 1776 spin_lock_irqsave(&ictx->kc_lock, flags); 1777 ictx->last_keycode = ictx->kc; 1778 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1779 } 1780 return; 1781 } 1782 1783 /* Only panel type events left to process now */ 1784 spin_lock_irqsave(&ictx->kc_lock, flags); 1785 1786 do_gettimeofday(&t); 1787 /* KEY_MUTE repeats from knob need to be suppressed */ 1788 if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) { 1789 msec = tv2int(&t, &prev_time); 1790 if (msec < ictx->idev->rep[REP_DELAY]) { 1791 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1792 return; 1793 } 1794 } 1795 prev_time = t; 1796 kc = ictx->kc; 1797 1798 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1799 1800 input_report_key(ictx->idev, kc, press_type); 1801 input_sync(ictx->idev); 1802 1803 /* panel keys don't generate a release */ 1804 input_report_key(ictx->idev, kc, 0); 1805 input_sync(ictx->idev); 1806 1807 spin_lock_irqsave(&ictx->kc_lock, flags); 1808 ictx->last_keycode = kc; 1809 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1810 1811 return; 1812 1813 not_input_data: 1814 if (len != 8) { 1815 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n", 1816 __func__, len, intf); 1817 return; 1818 } 1819 1820 /* iMON 2.4G associate frame */ 1821 if (buf[0] == 0x00 && 1822 buf[2] == 0xFF && /* REFID */ 1823 buf[3] == 0xFF && 1824 buf[4] == 0xFF && 1825 buf[5] == 0xFF && /* iMON 2.4G */ 1826 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */ 1827 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */ 1828 dev_warn(dev, "%s: remote associated refid=%02X\n", 1829 __func__, buf[1]); 1830 ictx->rf_isassociating = false; 1831 } 1832 } 1833 1834 /* 1835 * Callback function for USB core API: receive data 1836 */ 1837 static void usb_rx_callback_intf0(struct urb *urb) 1838 { 1839 struct imon_context *ictx; 1840 int intfnum = 0; 1841 1842 if (!urb) 1843 return; 1844 1845 ictx = (struct imon_context *)urb->context; 1846 if (!ictx) 1847 return; 1848 1849 /* 1850 * if we get a callback before we're done configuring the hardware, we 1851 * can't yet process the data, as there's nowhere to send it, but we 1852 * still need to submit a new rx URB to avoid wedging the hardware 1853 */ 1854 if (!ictx->dev_present_intf0) 1855 goto out; 1856 1857 switch (urb->status) { 1858 case -ENOENT: /* usbcore unlink successful! */ 1859 return; 1860 1861 case -ESHUTDOWN: /* transport endpoint was shut down */ 1862 break; 1863 1864 case 0: 1865 if (ictx->rdev->driver_type == RC_DRIVER_IR_RAW) 1866 imon_incoming_ir_raw(ictx, urb, intfnum); 1867 else 1868 imon_incoming_scancode(ictx, urb, intfnum); 1869 break; 1870 1871 default: 1872 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1873 __func__, urb->status); 1874 break; 1875 } 1876 1877 out: 1878 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 1879 } 1880 1881 static void usb_rx_callback_intf1(struct urb *urb) 1882 { 1883 struct imon_context *ictx; 1884 int intfnum = 1; 1885 1886 if (!urb) 1887 return; 1888 1889 ictx = (struct imon_context *)urb->context; 1890 if (!ictx) 1891 return; 1892 1893 /* 1894 * if we get a callback before we're done configuring the hardware, we 1895 * can't yet process the data, as there's nowhere to send it, but we 1896 * still need to submit a new rx URB to avoid wedging the hardware 1897 */ 1898 if (!ictx->dev_present_intf1) 1899 goto out; 1900 1901 switch (urb->status) { 1902 case -ENOENT: /* usbcore unlink successful! */ 1903 return; 1904 1905 case -ESHUTDOWN: /* transport endpoint was shut down */ 1906 break; 1907 1908 case 0: 1909 if (ictx->rdev->driver_type == RC_DRIVER_IR_RAW) 1910 imon_incoming_ir_raw(ictx, urb, intfnum); 1911 else 1912 imon_incoming_scancode(ictx, urb, intfnum); 1913 break; 1914 1915 default: 1916 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1917 __func__, urb->status); 1918 break; 1919 } 1920 1921 out: 1922 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 1923 } 1924 1925 /* 1926 * The 0x15c2:0xffdc device ID was used for umpteen different imon 1927 * devices, and all of them constantly spew interrupts, even when there 1928 * is no actual data to report. However, byte 6 of this buffer looks like 1929 * its unique across device variants, so we're trying to key off that to 1930 * figure out which display type (if any) and what IR protocol the device 1931 * actually supports. These devices have their IR protocol hard-coded into 1932 * their firmware, they can't be changed on the fly like the newer hardware. 1933 */ 1934 static void imon_get_ffdc_type(struct imon_context *ictx) 1935 { 1936 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6]; 1937 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE; 1938 u64 allowed_protos = RC_PROTO_BIT_OTHER; 1939 1940 switch (ffdc_cfg_byte) { 1941 /* iMON Knob, no display, iMON IR + vol knob */ 1942 case 0x21: 1943 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR"); 1944 ictx->display_supported = false; 1945 break; 1946 /* iMON 2.4G LT (usb stick), no display, iMON RF */ 1947 case 0x4e: 1948 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF"); 1949 ictx->display_supported = false; 1950 ictx->rf_device = true; 1951 break; 1952 /* iMON VFD, no IR (does have vol knob tho) */ 1953 case 0x35: 1954 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR"); 1955 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1956 break; 1957 /* iMON VFD, iMON IR */ 1958 case 0x24: 1959 case 0x85: 1960 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR"); 1961 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1962 break; 1963 /* iMON VFD, MCE IR */ 1964 case 0x46: 1965 case 0x7e: 1966 case 0x9e: 1967 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR"); 1968 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1969 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1970 break; 1971 /* iMON LCD, MCE IR */ 1972 case 0x9f: 1973 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR"); 1974 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1975 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1976 break; 1977 default: 1978 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR"); 1979 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1980 /* We don't know which one it is, allow user to set the 1981 * RC6 one from userspace if OTHER wasn't correct. */ 1982 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1983 break; 1984 } 1985 1986 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte); 1987 1988 ictx->display_type = detected_display_type; 1989 ictx->rc_proto = allowed_protos; 1990 } 1991 1992 static void imon_set_display_type(struct imon_context *ictx) 1993 { 1994 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1995 1996 /* 1997 * Try to auto-detect the type of display if the user hasn't set 1998 * it by hand via the display_type modparam. Default is VFD. 1999 */ 2000 2001 if (display_type == IMON_DISPLAY_TYPE_AUTO) { 2002 switch (ictx->product) { 2003 case 0xffdc: 2004 /* set in imon_get_ffdc_type() */ 2005 configured_display_type = ictx->display_type; 2006 break; 2007 case 0x0034: 2008 case 0x0035: 2009 configured_display_type = IMON_DISPLAY_TYPE_VGA; 2010 break; 2011 case 0x0038: 2012 case 0x0039: 2013 case 0x0045: 2014 configured_display_type = IMON_DISPLAY_TYPE_LCD; 2015 break; 2016 case 0x003c: 2017 case 0x0041: 2018 case 0x0042: 2019 case 0x0043: 2020 case 0x8001: 2021 case 0xff30: 2022 configured_display_type = IMON_DISPLAY_TYPE_NONE; 2023 ictx->display_supported = false; 2024 break; 2025 case 0x0036: 2026 case 0x0044: 2027 case 0xffda: 2028 default: 2029 configured_display_type = IMON_DISPLAY_TYPE_VFD; 2030 break; 2031 } 2032 } else { 2033 configured_display_type = display_type; 2034 if (display_type == IMON_DISPLAY_TYPE_NONE) 2035 ictx->display_supported = false; 2036 else 2037 ictx->display_supported = true; 2038 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n", 2039 __func__, display_type); 2040 } 2041 2042 ictx->display_type = configured_display_type; 2043 } 2044 2045 static struct rc_dev *imon_init_rdev(struct imon_context *ictx) 2046 { 2047 struct rc_dev *rdev; 2048 int ret; 2049 static const unsigned char fp_packet[] = { 2050 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 }; 2051 2052 rdev = rc_allocate_device(ictx->dev_descr->flags & IMON_IR_RAW ? 2053 RC_DRIVER_IR_RAW : RC_DRIVER_SCANCODE); 2054 if (!rdev) { 2055 dev_err(ictx->dev, "remote control dev allocation failed\n"); 2056 goto out; 2057 } 2058 2059 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev), 2060 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product); 2061 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev, 2062 sizeof(ictx->phys_rdev)); 2063 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev)); 2064 2065 rdev->device_name = ictx->name_rdev; 2066 rdev->input_phys = ictx->phys_rdev; 2067 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id); 2068 rdev->dev.parent = ictx->dev; 2069 2070 rdev->priv = ictx; 2071 if (ictx->dev_descr->flags & IMON_IR_RAW) 2072 rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; 2073 else 2074 /* iMON PAD or MCE */ 2075 rdev->allowed_protocols = RC_PROTO_BIT_OTHER | 2076 RC_PROTO_BIT_RC6_MCE; 2077 rdev->change_protocol = imon_ir_change_protocol; 2078 rdev->driver_name = MOD_NAME; 2079 2080 /* Enable front-panel buttons and/or knobs */ 2081 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet)); 2082 ret = send_packet(ictx); 2083 /* Not fatal, but warn about it */ 2084 if (ret) 2085 dev_info(ictx->dev, "panel buttons/knobs setup failed\n"); 2086 2087 if (ictx->product == 0xffdc) { 2088 imon_get_ffdc_type(ictx); 2089 rdev->allowed_protocols = ictx->rc_proto; 2090 } 2091 2092 imon_set_display_type(ictx); 2093 2094 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE || 2095 ictx->dev_descr->flags & IMON_IR_RAW) 2096 rdev->map_name = RC_MAP_IMON_MCE; 2097 else 2098 rdev->map_name = RC_MAP_IMON_PAD; 2099 2100 ret = rc_register_device(rdev); 2101 if (ret < 0) { 2102 dev_err(ictx->dev, "remote input dev register failed\n"); 2103 goto out; 2104 } 2105 2106 return rdev; 2107 2108 out: 2109 rc_free_device(rdev); 2110 return NULL; 2111 } 2112 2113 static struct input_dev *imon_init_idev(struct imon_context *ictx) 2114 { 2115 struct imon_panel_key_table *key_table = ictx->dev_descr->key_table; 2116 struct input_dev *idev; 2117 int ret, i; 2118 2119 idev = input_allocate_device(); 2120 if (!idev) 2121 goto out; 2122 2123 snprintf(ictx->name_idev, sizeof(ictx->name_idev), 2124 "iMON Panel, Knob and Mouse(%04x:%04x)", 2125 ictx->vendor, ictx->product); 2126 idev->name = ictx->name_idev; 2127 2128 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev, 2129 sizeof(ictx->phys_idev)); 2130 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev)); 2131 idev->phys = ictx->phys_idev; 2132 2133 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL); 2134 2135 idev->keybit[BIT_WORD(BTN_MOUSE)] = 2136 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2137 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | 2138 BIT_MASK(REL_WHEEL); 2139 2140 /* panel and/or knob code support */ 2141 for (i = 0; key_table[i].hw_code != 0; i++) { 2142 u32 kc = key_table[i].keycode; 2143 __set_bit(kc, idev->keybit); 2144 } 2145 2146 usb_to_input_id(ictx->usbdev_intf0, &idev->id); 2147 idev->dev.parent = ictx->dev; 2148 input_set_drvdata(idev, ictx); 2149 2150 ret = input_register_device(idev); 2151 if (ret < 0) { 2152 dev_err(ictx->dev, "input dev register failed\n"); 2153 goto out; 2154 } 2155 2156 return idev; 2157 2158 out: 2159 input_free_device(idev); 2160 return NULL; 2161 } 2162 2163 static struct input_dev *imon_init_touch(struct imon_context *ictx) 2164 { 2165 struct input_dev *touch; 2166 int ret; 2167 2168 touch = input_allocate_device(); 2169 if (!touch) 2170 goto touch_alloc_failed; 2171 2172 snprintf(ictx->name_touch, sizeof(ictx->name_touch), 2173 "iMON USB Touchscreen (%04x:%04x)", 2174 ictx->vendor, ictx->product); 2175 touch->name = ictx->name_touch; 2176 2177 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch, 2178 sizeof(ictx->phys_touch)); 2179 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch)); 2180 touch->phys = ictx->phys_touch; 2181 2182 touch->evbit[0] = 2183 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 2184 touch->keybit[BIT_WORD(BTN_TOUCH)] = 2185 BIT_MASK(BTN_TOUCH); 2186 input_set_abs_params(touch, ABS_X, 2187 0x00, 0xfff, 0, 0); 2188 input_set_abs_params(touch, ABS_Y, 2189 0x00, 0xfff, 0, 0); 2190 2191 input_set_drvdata(touch, ictx); 2192 2193 usb_to_input_id(ictx->usbdev_intf1, &touch->id); 2194 touch->dev.parent = ictx->dev; 2195 ret = input_register_device(touch); 2196 if (ret < 0) { 2197 dev_info(ictx->dev, "touchscreen input dev register failed\n"); 2198 goto touch_register_failed; 2199 } 2200 2201 return touch; 2202 2203 touch_register_failed: 2204 input_free_device(touch); 2205 2206 touch_alloc_failed: 2207 return NULL; 2208 } 2209 2210 static bool imon_find_endpoints(struct imon_context *ictx, 2211 struct usb_host_interface *iface_desc) 2212 { 2213 struct usb_endpoint_descriptor *ep; 2214 struct usb_endpoint_descriptor *rx_endpoint = NULL; 2215 struct usb_endpoint_descriptor *tx_endpoint = NULL; 2216 int ifnum = iface_desc->desc.bInterfaceNumber; 2217 int num_endpts = iface_desc->desc.bNumEndpoints; 2218 int i, ep_dir, ep_type; 2219 bool ir_ep_found = false; 2220 bool display_ep_found = false; 2221 bool tx_control = false; 2222 2223 /* 2224 * Scan the endpoint list and set: 2225 * first input endpoint = IR endpoint 2226 * first output endpoint = display endpoint 2227 */ 2228 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) { 2229 ep = &iface_desc->endpoint[i].desc; 2230 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; 2231 ep_type = usb_endpoint_type(ep); 2232 2233 if (!ir_ep_found && ep_dir == USB_DIR_IN && 2234 ep_type == USB_ENDPOINT_XFER_INT) { 2235 2236 rx_endpoint = ep; 2237 ir_ep_found = true; 2238 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__); 2239 2240 } else if (!display_ep_found && ep_dir == USB_DIR_OUT && 2241 ep_type == USB_ENDPOINT_XFER_INT) { 2242 tx_endpoint = ep; 2243 display_ep_found = true; 2244 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__); 2245 } 2246 } 2247 2248 if (ifnum == 0) { 2249 ictx->rx_endpoint_intf0 = rx_endpoint; 2250 /* 2251 * tx is used to send characters to lcd/vfd, associate RF 2252 * remotes, set IR protocol, and maybe more... 2253 */ 2254 ictx->tx_endpoint = tx_endpoint; 2255 } else { 2256 ictx->rx_endpoint_intf1 = rx_endpoint; 2257 } 2258 2259 /* 2260 * If we didn't find a display endpoint, this is probably one of the 2261 * newer iMON devices that use control urb instead of interrupt 2262 */ 2263 if (!display_ep_found) { 2264 tx_control = true; 2265 display_ep_found = true; 2266 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n", 2267 __func__); 2268 } 2269 2270 /* 2271 * Some iMON receivers have no display. Unfortunately, it seems 2272 * that SoundGraph recycles device IDs between devices both with 2273 * and without... :\ 2274 */ 2275 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) { 2276 display_ep_found = false; 2277 dev_dbg(ictx->dev, "%s: device has no display\n", __func__); 2278 } 2279 2280 /* 2281 * iMON Touch devices have a VGA touchscreen, but no "display", as 2282 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD). 2283 */ 2284 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2285 display_ep_found = false; 2286 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__); 2287 } 2288 2289 /* Input endpoint is mandatory */ 2290 if (!ir_ep_found) 2291 pr_err("no valid input (IR) endpoint found\n"); 2292 2293 ictx->tx_control = tx_control; 2294 2295 if (display_ep_found) 2296 ictx->display_supported = true; 2297 2298 return ir_ep_found; 2299 2300 } 2301 2302 static struct imon_context *imon_init_intf0(struct usb_interface *intf, 2303 const struct usb_device_id *id) 2304 { 2305 struct imon_context *ictx; 2306 struct urb *rx_urb; 2307 struct urb *tx_urb; 2308 struct device *dev = &intf->dev; 2309 struct usb_host_interface *iface_desc; 2310 int ret = -ENOMEM; 2311 2312 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL); 2313 if (!ictx) 2314 goto exit; 2315 2316 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2317 if (!rx_urb) 2318 goto rx_urb_alloc_failed; 2319 tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2320 if (!tx_urb) 2321 goto tx_urb_alloc_failed; 2322 2323 mutex_init(&ictx->lock); 2324 spin_lock_init(&ictx->kc_lock); 2325 2326 mutex_lock(&ictx->lock); 2327 2328 ictx->dev = dev; 2329 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf)); 2330 ictx->rx_urb_intf0 = rx_urb; 2331 ictx->tx_urb = tx_urb; 2332 ictx->rf_device = false; 2333 2334 init_completion(&ictx->tx.finished); 2335 2336 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor); 2337 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct); 2338 2339 /* save drive info for later accessing the panel/knob key table */ 2340 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info; 2341 /* default send_packet delay is 5ms but some devices need more */ 2342 ictx->send_packet_delay = ictx->dev_descr->flags & 2343 IMON_NEED_20MS_PKT_DELAY ? 20 : 5; 2344 2345 ret = -ENODEV; 2346 iface_desc = intf->cur_altsetting; 2347 if (!imon_find_endpoints(ictx, iface_desc)) { 2348 goto find_endpoint_failed; 2349 } 2350 2351 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2352 usb_rcvintpipe(ictx->usbdev_intf0, 2353 ictx->rx_endpoint_intf0->bEndpointAddress), 2354 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2355 usb_rx_callback_intf0, ictx, 2356 ictx->rx_endpoint_intf0->bInterval); 2357 2358 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL); 2359 if (ret) { 2360 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret); 2361 goto urb_submit_failed; 2362 } 2363 2364 ictx->idev = imon_init_idev(ictx); 2365 if (!ictx->idev) { 2366 dev_err(dev, "%s: input device setup failed\n", __func__); 2367 goto idev_setup_failed; 2368 } 2369 2370 ictx->rdev = imon_init_rdev(ictx); 2371 if (!ictx->rdev) { 2372 dev_err(dev, "%s: rc device setup failed\n", __func__); 2373 goto rdev_setup_failed; 2374 } 2375 2376 ictx->dev_present_intf0 = true; 2377 2378 mutex_unlock(&ictx->lock); 2379 return ictx; 2380 2381 rdev_setup_failed: 2382 input_unregister_device(ictx->idev); 2383 idev_setup_failed: 2384 usb_kill_urb(ictx->rx_urb_intf0); 2385 urb_submit_failed: 2386 find_endpoint_failed: 2387 usb_put_dev(ictx->usbdev_intf0); 2388 mutex_unlock(&ictx->lock); 2389 usb_free_urb(tx_urb); 2390 tx_urb_alloc_failed: 2391 usb_free_urb(rx_urb); 2392 rx_urb_alloc_failed: 2393 kfree(ictx); 2394 exit: 2395 dev_err(dev, "unable to initialize intf0, err %d\n", ret); 2396 2397 return NULL; 2398 } 2399 2400 static struct imon_context *imon_init_intf1(struct usb_interface *intf, 2401 struct imon_context *ictx) 2402 { 2403 struct urb *rx_urb; 2404 struct usb_host_interface *iface_desc; 2405 int ret = -ENOMEM; 2406 2407 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2408 if (!rx_urb) 2409 goto rx_urb_alloc_failed; 2410 2411 mutex_lock(&ictx->lock); 2412 2413 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2414 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0); 2415 } 2416 2417 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf)); 2418 ictx->rx_urb_intf1 = rx_urb; 2419 2420 ret = -ENODEV; 2421 iface_desc = intf->cur_altsetting; 2422 if (!imon_find_endpoints(ictx, iface_desc)) 2423 goto find_endpoint_failed; 2424 2425 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2426 ictx->touch = imon_init_touch(ictx); 2427 if (!ictx->touch) 2428 goto touch_setup_failed; 2429 } else 2430 ictx->touch = NULL; 2431 2432 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2433 usb_rcvintpipe(ictx->usbdev_intf1, 2434 ictx->rx_endpoint_intf1->bEndpointAddress), 2435 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2436 usb_rx_callback_intf1, ictx, 2437 ictx->rx_endpoint_intf1->bInterval); 2438 2439 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL); 2440 2441 if (ret) { 2442 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret); 2443 goto urb_submit_failed; 2444 } 2445 2446 ictx->dev_present_intf1 = true; 2447 2448 mutex_unlock(&ictx->lock); 2449 return ictx; 2450 2451 urb_submit_failed: 2452 if (ictx->touch) 2453 input_unregister_device(ictx->touch); 2454 touch_setup_failed: 2455 find_endpoint_failed: 2456 usb_put_dev(ictx->usbdev_intf1); 2457 mutex_unlock(&ictx->lock); 2458 usb_free_urb(rx_urb); 2459 rx_urb_alloc_failed: 2460 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret); 2461 2462 return NULL; 2463 } 2464 2465 static void imon_init_display(struct imon_context *ictx, 2466 struct usb_interface *intf) 2467 { 2468 int ret; 2469 2470 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n"); 2471 2472 /* set up sysfs entry for built-in clock */ 2473 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group); 2474 if (ret) 2475 dev_err(ictx->dev, "Could not create display sysfs entries(%d)", 2476 ret); 2477 2478 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2479 ret = usb_register_dev(intf, &imon_lcd_class); 2480 else 2481 ret = usb_register_dev(intf, &imon_vfd_class); 2482 if (ret) 2483 /* Not a fatal error, so ignore */ 2484 dev_info(ictx->dev, "could not get a minor number for display\n"); 2485 2486 } 2487 2488 /* 2489 * Callback function for USB core API: Probe 2490 */ 2491 static int imon_probe(struct usb_interface *interface, 2492 const struct usb_device_id *id) 2493 { 2494 struct usb_device *usbdev = NULL; 2495 struct usb_host_interface *iface_desc = NULL; 2496 struct usb_interface *first_if; 2497 struct device *dev = &interface->dev; 2498 int ifnum, sysfs_err; 2499 int ret = 0; 2500 struct imon_context *ictx = NULL; 2501 struct imon_context *first_if_ctx = NULL; 2502 u16 vendor, product; 2503 2504 usbdev = usb_get_dev(interface_to_usbdev(interface)); 2505 iface_desc = interface->cur_altsetting; 2506 ifnum = iface_desc->desc.bInterfaceNumber; 2507 vendor = le16_to_cpu(usbdev->descriptor.idVendor); 2508 product = le16_to_cpu(usbdev->descriptor.idProduct); 2509 2510 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n", 2511 __func__, vendor, product, ifnum); 2512 2513 /* prevent races probing devices w/multiple interfaces */ 2514 mutex_lock(&driver_lock); 2515 2516 first_if = usb_ifnum_to_if(usbdev, 0); 2517 if (!first_if) { 2518 ret = -ENODEV; 2519 goto fail; 2520 } 2521 2522 first_if_ctx = usb_get_intfdata(first_if); 2523 2524 if (ifnum == 0) { 2525 ictx = imon_init_intf0(interface, id); 2526 if (!ictx) { 2527 pr_err("failed to initialize context!\n"); 2528 ret = -ENODEV; 2529 goto fail; 2530 } 2531 2532 } else { 2533 /* this is the secondary interface on the device */ 2534 2535 /* fail early if first intf failed to register */ 2536 if (!first_if_ctx) { 2537 ret = -ENODEV; 2538 goto fail; 2539 } 2540 2541 ictx = imon_init_intf1(interface, first_if_ctx); 2542 if (!ictx) { 2543 pr_err("failed to attach to context!\n"); 2544 ret = -ENODEV; 2545 goto fail; 2546 } 2547 2548 } 2549 2550 usb_set_intfdata(interface, ictx); 2551 2552 if (ifnum == 0) { 2553 mutex_lock(&ictx->lock); 2554 2555 if (product == 0xffdc && ictx->rf_device) { 2556 sysfs_err = sysfs_create_group(&interface->dev.kobj, 2557 &imon_rf_attr_group); 2558 if (sysfs_err) 2559 pr_err("Could not create RF sysfs entries(%d)\n", 2560 sysfs_err); 2561 } 2562 2563 if (ictx->display_supported) 2564 imon_init_display(ictx, interface); 2565 2566 mutex_unlock(&ictx->lock); 2567 } 2568 2569 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n", 2570 vendor, product, ifnum, 2571 usbdev->bus->busnum, usbdev->devnum); 2572 2573 mutex_unlock(&driver_lock); 2574 usb_put_dev(usbdev); 2575 2576 return 0; 2577 2578 fail: 2579 mutex_unlock(&driver_lock); 2580 usb_put_dev(usbdev); 2581 dev_err(dev, "unable to register, err %d\n", ret); 2582 2583 return ret; 2584 } 2585 2586 /* 2587 * Callback function for USB core API: disconnect 2588 */ 2589 static void imon_disconnect(struct usb_interface *interface) 2590 { 2591 struct imon_context *ictx; 2592 struct device *dev; 2593 int ifnum; 2594 2595 /* prevent races with multi-interface device probing and display_open */ 2596 mutex_lock(&driver_lock); 2597 2598 ictx = usb_get_intfdata(interface); 2599 dev = ictx->dev; 2600 ifnum = interface->cur_altsetting->desc.bInterfaceNumber; 2601 2602 /* 2603 * sysfs_remove_group is safe to call even if sysfs_create_group 2604 * hasn't been called 2605 */ 2606 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group); 2607 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group); 2608 2609 usb_set_intfdata(interface, NULL); 2610 2611 /* Abort ongoing write */ 2612 if (ictx->tx.busy) { 2613 usb_kill_urb(ictx->tx_urb); 2614 complete(&ictx->tx.finished); 2615 } 2616 2617 if (ifnum == 0) { 2618 ictx->dev_present_intf0 = false; 2619 usb_kill_urb(ictx->rx_urb_intf0); 2620 usb_put_dev(ictx->usbdev_intf0); 2621 input_unregister_device(ictx->idev); 2622 rc_unregister_device(ictx->rdev); 2623 if (ictx->display_supported) { 2624 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2625 usb_deregister_dev(interface, &imon_lcd_class); 2626 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD) 2627 usb_deregister_dev(interface, &imon_vfd_class); 2628 } 2629 } else { 2630 ictx->dev_present_intf1 = false; 2631 usb_kill_urb(ictx->rx_urb_intf1); 2632 usb_put_dev(ictx->usbdev_intf1); 2633 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2634 input_unregister_device(ictx->touch); 2635 del_timer_sync(&ictx->ttimer); 2636 } 2637 } 2638 2639 if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) 2640 free_imon_context(ictx); 2641 2642 mutex_unlock(&driver_lock); 2643 2644 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n", 2645 __func__, ifnum); 2646 } 2647 2648 static int imon_suspend(struct usb_interface *intf, pm_message_t message) 2649 { 2650 struct imon_context *ictx = usb_get_intfdata(intf); 2651 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2652 2653 if (ifnum == 0) 2654 usb_kill_urb(ictx->rx_urb_intf0); 2655 else 2656 usb_kill_urb(ictx->rx_urb_intf1); 2657 2658 return 0; 2659 } 2660 2661 static int imon_resume(struct usb_interface *intf) 2662 { 2663 int rc = 0; 2664 struct imon_context *ictx = usb_get_intfdata(intf); 2665 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2666 2667 if (ifnum == 0) { 2668 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2669 usb_rcvintpipe(ictx->usbdev_intf0, 2670 ictx->rx_endpoint_intf0->bEndpointAddress), 2671 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2672 usb_rx_callback_intf0, ictx, 2673 ictx->rx_endpoint_intf0->bInterval); 2674 2675 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 2676 2677 } else { 2678 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2679 usb_rcvintpipe(ictx->usbdev_intf1, 2680 ictx->rx_endpoint_intf1->bEndpointAddress), 2681 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2682 usb_rx_callback_intf1, ictx, 2683 ictx->rx_endpoint_intf1->bInterval); 2684 2685 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 2686 } 2687 2688 return rc; 2689 } 2690 2691 module_usb_driver(imon_driver); 2692