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 * Fields for deferring free_imon_context(). 158 * 159 * Since reference to "struct imon_context" is stored into 160 * "struct file"->private_data, we need to remember 161 * how many file descriptors might access this "struct imon_context". 162 */ 163 refcount_t users; 164 /* 165 * Use a flag for telling display_open()/vfd_write()/lcd_write() that 166 * imon_disconnect() was already called. 167 */ 168 bool disconnected; 169 /* 170 * We need to wait for RCU grace period in order to allow 171 * display_open() to safely check ->disconnected and increment ->users. 172 */ 173 struct rcu_head rcu; 174 }; 175 176 #define TOUCH_TIMEOUT (HZ/30) 177 178 /* vfd character device file operations */ 179 static const struct file_operations vfd_fops = { 180 .owner = THIS_MODULE, 181 .open = display_open, 182 .write = vfd_write, 183 .release = display_close, 184 .llseek = noop_llseek, 185 }; 186 187 /* lcd character device file operations */ 188 static const struct file_operations lcd_fops = { 189 .owner = THIS_MODULE, 190 .open = display_open, 191 .write = lcd_write, 192 .release = display_close, 193 .llseek = noop_llseek, 194 }; 195 196 enum { 197 IMON_DISPLAY_TYPE_AUTO = 0, 198 IMON_DISPLAY_TYPE_VFD = 1, 199 IMON_DISPLAY_TYPE_LCD = 2, 200 IMON_DISPLAY_TYPE_VGA = 3, 201 IMON_DISPLAY_TYPE_NONE = 4, 202 }; 203 204 enum { 205 IMON_KEY_IMON = 0, 206 IMON_KEY_MCE = 1, 207 IMON_KEY_PANEL = 2, 208 }; 209 210 static struct usb_class_driver imon_vfd_class = { 211 .name = DEVICE_NAME, 212 .fops = &vfd_fops, 213 .minor_base = DISPLAY_MINOR_BASE, 214 }; 215 216 static struct usb_class_driver imon_lcd_class = { 217 .name = DEVICE_NAME, 218 .fops = &lcd_fops, 219 .minor_base = DISPLAY_MINOR_BASE, 220 }; 221 222 /* imon receiver front panel/knob key table */ 223 static const struct imon_usb_dev_descr imon_default_table = { 224 .flags = IMON_NO_FLAGS, 225 .key_table = { 226 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 227 { 0x000000001200ffeell, KEY_UP }, 228 { 0x000000001300ffeell, KEY_DOWN }, 229 { 0x000000001400ffeell, KEY_LEFT }, 230 { 0x000000001500ffeell, KEY_RIGHT }, 231 { 0x000000001600ffeell, KEY_ENTER }, 232 { 0x000000001700ffeell, KEY_ESC }, 233 { 0x000000001f00ffeell, KEY_AUDIO }, 234 { 0x000000002000ffeell, KEY_VIDEO }, 235 { 0x000000002100ffeell, KEY_CAMERA }, 236 { 0x000000002700ffeell, KEY_DVD }, 237 { 0x000000002300ffeell, KEY_TV }, 238 { 0x000000002b00ffeell, KEY_EXIT }, 239 { 0x000000002c00ffeell, KEY_SELECT }, 240 { 0x000000002d00ffeell, KEY_MENU }, 241 { 0x000000000500ffeell, KEY_PREVIOUS }, 242 { 0x000000000700ffeell, KEY_REWIND }, 243 { 0x000000000400ffeell, KEY_STOP }, 244 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 245 { 0x000000000800ffeell, KEY_FASTFORWARD }, 246 { 0x000000000600ffeell, KEY_NEXT }, 247 { 0x000000010000ffeell, KEY_RIGHT }, 248 { 0x000001000000ffeell, KEY_LEFT }, 249 { 0x000000003d00ffeell, KEY_SELECT }, 250 { 0x000100000000ffeell, KEY_VOLUMEUP }, 251 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 252 { 0x000000000100ffeell, KEY_MUTE }, 253 /* 0xffdc iMON MCE VFD */ 254 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 255 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 256 { 0x00000001ffffffeell, KEY_MUTE }, 257 { 0x0000000fffffffeell, KEY_MEDIA }, 258 { 0x00000012ffffffeell, KEY_UP }, 259 { 0x00000013ffffffeell, KEY_DOWN }, 260 { 0x00000014ffffffeell, KEY_LEFT }, 261 { 0x00000015ffffffeell, KEY_RIGHT }, 262 { 0x00000016ffffffeell, KEY_ENTER }, 263 { 0x00000017ffffffeell, KEY_ESC }, 264 /* iMON Knob values */ 265 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 266 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 267 { 0x000008ffffffffeell, KEY_MUTE }, 268 { 0, KEY_RESERVED }, 269 } 270 }; 271 272 static const struct imon_usb_dev_descr imon_OEM_VFD = { 273 .flags = IMON_NEED_20MS_PKT_DELAY, 274 .key_table = { 275 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 276 { 0x000000001200ffeell, KEY_UP }, 277 { 0x000000001300ffeell, KEY_DOWN }, 278 { 0x000000001400ffeell, KEY_LEFT }, 279 { 0x000000001500ffeell, KEY_RIGHT }, 280 { 0x000000001600ffeell, KEY_ENTER }, 281 { 0x000000001700ffeell, KEY_ESC }, 282 { 0x000000001f00ffeell, KEY_AUDIO }, 283 { 0x000000002b00ffeell, KEY_EXIT }, 284 { 0x000000002c00ffeell, KEY_SELECT }, 285 { 0x000000002d00ffeell, KEY_MENU }, 286 { 0x000000000500ffeell, KEY_PREVIOUS }, 287 { 0x000000000700ffeell, KEY_REWIND }, 288 { 0x000000000400ffeell, KEY_STOP }, 289 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 290 { 0x000000000800ffeell, KEY_FASTFORWARD }, 291 { 0x000000000600ffeell, KEY_NEXT }, 292 { 0x000000010000ffeell, KEY_RIGHT }, 293 { 0x000001000000ffeell, KEY_LEFT }, 294 { 0x000000003d00ffeell, KEY_SELECT }, 295 { 0x000100000000ffeell, KEY_VOLUMEUP }, 296 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 297 { 0x000000000100ffeell, KEY_MUTE }, 298 /* 0xffdc iMON MCE VFD */ 299 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 300 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 301 { 0x00000001ffffffeell, KEY_MUTE }, 302 { 0x0000000fffffffeell, KEY_MEDIA }, 303 { 0x00000012ffffffeell, KEY_UP }, 304 { 0x00000013ffffffeell, KEY_DOWN }, 305 { 0x00000014ffffffeell, KEY_LEFT }, 306 { 0x00000015ffffffeell, KEY_RIGHT }, 307 { 0x00000016ffffffeell, KEY_ENTER }, 308 { 0x00000017ffffffeell, KEY_ESC }, 309 /* iMON Knob values */ 310 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 311 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 312 { 0x000008ffffffffeell, KEY_MUTE }, 313 { 0, KEY_RESERVED }, 314 } 315 }; 316 317 /* imon receiver front panel/knob key table for DH102*/ 318 static const struct imon_usb_dev_descr imon_DH102 = { 319 .flags = IMON_NO_FLAGS, 320 .key_table = { 321 { 0x000100000000ffeell, KEY_VOLUMEUP }, 322 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 323 { 0x000000010000ffeell, KEY_MUTE }, 324 { 0x0000000f0000ffeell, KEY_MEDIA }, 325 { 0x000000120000ffeell, KEY_UP }, 326 { 0x000000130000ffeell, KEY_DOWN }, 327 { 0x000000140000ffeell, KEY_LEFT }, 328 { 0x000000150000ffeell, KEY_RIGHT }, 329 { 0x000000160000ffeell, KEY_ENTER }, 330 { 0x000000170000ffeell, KEY_ESC }, 331 { 0x0000002b0000ffeell, KEY_EXIT }, 332 { 0x0000002c0000ffeell, KEY_SELECT }, 333 { 0x0000002d0000ffeell, KEY_MENU }, 334 { 0, KEY_RESERVED } 335 } 336 }; 337 338 /* imon ultrabay front panel key table */ 339 static const struct imon_usb_dev_descr ultrabay_table = { 340 .flags = IMON_SUPPRESS_REPEATED_KEYS, 341 .key_table = { 342 { 0x0000000f0000ffeell, KEY_MEDIA }, /* Go */ 343 { 0x000000000100ffeell, KEY_UP }, 344 { 0x000000000001ffeell, KEY_DOWN }, 345 { 0x000000160000ffeell, KEY_ENTER }, 346 { 0x0000001f0000ffeell, KEY_AUDIO }, /* Music */ 347 { 0x000000200000ffeell, KEY_VIDEO }, /* Movie */ 348 { 0x000000210000ffeell, KEY_CAMERA }, /* Photo */ 349 { 0x000000270000ffeell, KEY_DVD }, /* DVD */ 350 { 0x000000230000ffeell, KEY_TV }, /* TV */ 351 { 0x000000050000ffeell, KEY_PREVIOUS }, /* Previous */ 352 { 0x000000070000ffeell, KEY_REWIND }, 353 { 0x000000040000ffeell, KEY_STOP }, 354 { 0x000000020000ffeell, KEY_PLAYPAUSE }, 355 { 0x000000080000ffeell, KEY_FASTFORWARD }, 356 { 0x000000060000ffeell, KEY_NEXT }, /* Next */ 357 { 0x000100000000ffeell, KEY_VOLUMEUP }, 358 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 359 { 0x000000010000ffeell, KEY_MUTE }, 360 { 0, KEY_RESERVED }, 361 } 362 }; 363 364 /* 365 * USB Device ID for iMON USB Control Boards 366 * 367 * The Windows drivers contain 6 different inf files, more or less one for 368 * each new device until the 0x0034-0x0046 devices, which all use the same 369 * driver. Some of the devices in the 34-46 range haven't been definitively 370 * identified yet. Early devices have either a TriGem Computer, Inc. or a 371 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later 372 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports 373 * the ffdc and later devices, which do onboard decoding. 374 */ 375 static const struct usb_device_id imon_usb_id_table[] = { 376 /* 377 * Several devices with this same device ID, all use iMON_PAD.inf 378 * SoundGraph iMON PAD (IR & VFD) 379 * SoundGraph iMON PAD (IR & LCD) 380 * SoundGraph iMON Knob (IR only) 381 */ 382 { USB_DEVICE(0x15c2, 0xffdc), 383 .driver_info = (unsigned long)&imon_default_table }, 384 385 /* 386 * Newer devices, all driven by the latest iMON Windows driver, full 387 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2' 388 * Need user input to fill in details on unknown devices. 389 */ 390 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */ 391 { USB_DEVICE(0x15c2, 0x0034), 392 .driver_info = (unsigned long)&imon_DH102 }, 393 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */ 394 { USB_DEVICE(0x15c2, 0x0035), 395 .driver_info = (unsigned long)&imon_default_table}, 396 /* SoundGraph iMON OEM VFD (IR & VFD) */ 397 { USB_DEVICE(0x15c2, 0x0036), 398 .driver_info = (unsigned long)&imon_OEM_VFD }, 399 /* device specifics unknown */ 400 { USB_DEVICE(0x15c2, 0x0037), 401 .driver_info = (unsigned long)&imon_default_table}, 402 /* SoundGraph iMON OEM LCD (IR & LCD) */ 403 { USB_DEVICE(0x15c2, 0x0038), 404 .driver_info = (unsigned long)&imon_default_table}, 405 /* SoundGraph iMON UltraBay (IR & LCD) */ 406 { USB_DEVICE(0x15c2, 0x0039), 407 .driver_info = (unsigned long)&imon_default_table}, 408 /* device specifics unknown */ 409 { USB_DEVICE(0x15c2, 0x003a), 410 .driver_info = (unsigned long)&imon_default_table}, 411 /* device specifics unknown */ 412 { USB_DEVICE(0x15c2, 0x003b), 413 .driver_info = (unsigned long)&imon_default_table}, 414 /* SoundGraph iMON OEM Inside (IR only) */ 415 { USB_DEVICE(0x15c2, 0x003c), 416 .driver_info = (unsigned long)&imon_default_table}, 417 /* device specifics unknown */ 418 { USB_DEVICE(0x15c2, 0x003d), 419 .driver_info = (unsigned long)&imon_default_table}, 420 /* device specifics unknown */ 421 { USB_DEVICE(0x15c2, 0x003e), 422 .driver_info = (unsigned long)&imon_default_table}, 423 /* device specifics unknown */ 424 { USB_DEVICE(0x15c2, 0x003f), 425 .driver_info = (unsigned long)&imon_default_table}, 426 /* device specifics unknown */ 427 { USB_DEVICE(0x15c2, 0x0040), 428 .driver_info = (unsigned long)&imon_default_table}, 429 /* SoundGraph iMON MINI (IR only) */ 430 { USB_DEVICE(0x15c2, 0x0041), 431 .driver_info = (unsigned long)&imon_default_table}, 432 /* Antec Veris Multimedia Station EZ External (IR only) */ 433 { USB_DEVICE(0x15c2, 0x0042), 434 .driver_info = (unsigned long)&imon_default_table}, 435 /* Antec Veris Multimedia Station Basic Internal (IR only) */ 436 { USB_DEVICE(0x15c2, 0x0043), 437 .driver_info = (unsigned long)&imon_default_table}, 438 /* Antec Veris Multimedia Station Elite (IR & VFD) */ 439 { USB_DEVICE(0x15c2, 0x0044), 440 .driver_info = (unsigned long)&imon_default_table}, 441 /* Antec Veris Multimedia Station Premiere (IR & LCD) */ 442 { USB_DEVICE(0x15c2, 0x0045), 443 .driver_info = (unsigned long)&imon_default_table}, 444 /* device specifics unknown */ 445 { USB_DEVICE(0x15c2, 0x0046), 446 .driver_info = (unsigned long)&imon_default_table}, 447 {} 448 }; 449 450 /* USB Device data */ 451 static struct usb_driver imon_driver = { 452 .name = MOD_NAME, 453 .probe = imon_probe, 454 .disconnect = imon_disconnect, 455 .suspend = imon_suspend, 456 .resume = imon_resume, 457 .id_table = imon_usb_id_table, 458 }; 459 460 /* Module bookkeeping bits */ 461 MODULE_AUTHOR(MOD_AUTHOR); 462 MODULE_DESCRIPTION(MOD_DESC); 463 MODULE_VERSION(MOD_VERSION); 464 MODULE_LICENSE("GPL"); 465 MODULE_DEVICE_TABLE(usb, imon_usb_id_table); 466 467 static bool debug; 468 module_param(debug, bool, S_IRUGO | S_IWUSR); 469 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)"); 470 471 /* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */ 472 static int display_type; 473 module_param(display_type, int, S_IRUGO); 474 MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)"); 475 476 static int pad_stabilize = 1; 477 module_param(pad_stabilize, int, S_IRUGO | S_IWUSR); 478 MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD presses in arrow key mode. 0=disable, 1=enable (default)."); 479 480 /* 481 * In certain use cases, mouse mode isn't really helpful, and could actually 482 * cause confusion, so allow disabling it when the IR device is open. 483 */ 484 static bool nomouse; 485 module_param(nomouse, bool, S_IRUGO | S_IWUSR); 486 MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is open. 0=don't disable, 1=disable. (default: don't disable)"); 487 488 /* threshold at which a pad push registers as an arrow key in kbd mode */ 489 static int pad_thresh; 490 module_param(pad_thresh, int, S_IRUGO | S_IWUSR); 491 MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)"); 492 493 494 static void free_imon_context(struct imon_context *ictx) 495 { 496 struct device *dev = ictx->dev; 497 498 usb_free_urb(ictx->tx_urb); 499 WARN_ON(ictx->dev_present_intf0); 500 usb_free_urb(ictx->rx_urb_intf0); 501 WARN_ON(ictx->dev_present_intf1); 502 usb_free_urb(ictx->rx_urb_intf1); 503 kfree_rcu(ictx, rcu); 504 505 dev_dbg(dev, "%s: iMON context freed\n", __func__); 506 } 507 508 /* 509 * Called when the Display device (e.g. /dev/lcd0) 510 * is opened by the application. 511 */ 512 static int display_open(struct inode *inode, struct file *file) 513 { 514 struct usb_interface *interface; 515 struct imon_context *ictx = NULL; 516 int subminor; 517 int retval = 0; 518 519 subminor = iminor(inode); 520 interface = usb_find_interface(&imon_driver, subminor); 521 if (!interface) { 522 pr_err("could not find interface for minor %d\n", subminor); 523 retval = -ENODEV; 524 goto exit; 525 } 526 527 rcu_read_lock(); 528 ictx = usb_get_intfdata(interface); 529 if (!ictx || ictx->disconnected || !refcount_inc_not_zero(&ictx->users)) { 530 rcu_read_unlock(); 531 pr_err("no context found for minor %d\n", subminor); 532 retval = -ENODEV; 533 goto exit; 534 } 535 rcu_read_unlock(); 536 537 mutex_lock(&ictx->lock); 538 539 if (!ictx->display_supported) { 540 pr_err("display not supported by device\n"); 541 retval = -ENODEV; 542 } else if (ictx->display_isopen) { 543 pr_err("display port is already open\n"); 544 retval = -EBUSY; 545 } else { 546 ictx->display_isopen = true; 547 file->private_data = ictx; 548 dev_dbg(ictx->dev, "display port opened\n"); 549 } 550 551 mutex_unlock(&ictx->lock); 552 553 if (retval && refcount_dec_and_test(&ictx->users)) 554 free_imon_context(ictx); 555 556 exit: 557 return retval; 558 } 559 560 /* 561 * Called when the display device (e.g. /dev/lcd0) 562 * is closed by the application. 563 */ 564 static int display_close(struct inode *inode, struct file *file) 565 { 566 struct imon_context *ictx = file->private_data; 567 int retval = 0; 568 569 mutex_lock(&ictx->lock); 570 571 if (!ictx->display_supported) { 572 pr_err("display not supported by device\n"); 573 retval = -ENODEV; 574 } else if (!ictx->display_isopen) { 575 pr_err("display is not open\n"); 576 retval = -EIO; 577 } else { 578 ictx->display_isopen = false; 579 dev_dbg(ictx->dev, "display port closed\n"); 580 } 581 582 mutex_unlock(&ictx->lock); 583 if (refcount_dec_and_test(&ictx->users)) 584 free_imon_context(ictx); 585 return retval; 586 } 587 588 /* 589 * Sends a packet to the device -- this function must be called with 590 * ictx->lock held, or its unlock/lock sequence while waiting for tx 591 * to complete can/will lead to a deadlock. 592 */ 593 static int send_packet(struct imon_context *ictx) 594 { 595 unsigned int pipe; 596 unsigned long timeout; 597 int interval = 0; 598 int retval = 0; 599 struct usb_ctrlrequest *control_req = NULL; 600 601 /* Check if we need to use control or interrupt urb */ 602 if (!ictx->tx_control) { 603 pipe = usb_sndintpipe(ictx->usbdev_intf0, 604 ictx->tx_endpoint->bEndpointAddress); 605 interval = ictx->tx_endpoint->bInterval; 606 607 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe, 608 ictx->usb_tx_buf, 609 sizeof(ictx->usb_tx_buf), 610 usb_tx_callback, ictx, interval); 611 612 ictx->tx_urb->actual_length = 0; 613 } else { 614 /* fill request into kmalloc'ed space: */ 615 control_req = kmalloc(sizeof(*control_req), GFP_KERNEL); 616 if (control_req == NULL) 617 return -ENOMEM; 618 619 /* setup packet is '21 09 0200 0001 0008' */ 620 control_req->bRequestType = 0x21; 621 control_req->bRequest = 0x09; 622 control_req->wValue = cpu_to_le16(0x0200); 623 control_req->wIndex = cpu_to_le16(0x0001); 624 control_req->wLength = cpu_to_le16(0x0008); 625 626 /* control pipe is endpoint 0x00 */ 627 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0); 628 629 /* build the control urb */ 630 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0, 631 pipe, (unsigned char *)control_req, 632 ictx->usb_tx_buf, 633 sizeof(ictx->usb_tx_buf), 634 usb_tx_callback, ictx); 635 ictx->tx_urb->actual_length = 0; 636 } 637 638 reinit_completion(&ictx->tx.finished); 639 ictx->tx.busy = true; 640 smp_rmb(); /* ensure later readers know we're busy */ 641 642 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL); 643 if (retval) { 644 ictx->tx.busy = false; 645 smp_rmb(); /* ensure later readers know we're not busy */ 646 pr_err_ratelimited("error submitting urb(%d)\n", retval); 647 } else { 648 /* Wait for transmission to complete (or abort) */ 649 mutex_unlock(&ictx->lock); 650 retval = wait_for_completion_interruptible( 651 &ictx->tx.finished); 652 if (retval) { 653 usb_kill_urb(ictx->tx_urb); 654 pr_err_ratelimited("task interrupted\n"); 655 } 656 mutex_lock(&ictx->lock); 657 658 retval = ictx->tx.status; 659 if (retval) 660 pr_err_ratelimited("packet tx failed (%d)\n", retval); 661 } 662 663 kfree(control_req); 664 665 /* 666 * Induce a mandatory delay before returning, as otherwise, 667 * send_packet can get called so rapidly as to overwhelm the device, 668 * particularly on faster systems and/or those with quirky usb. 669 */ 670 timeout = msecs_to_jiffies(ictx->send_packet_delay); 671 set_current_state(TASK_INTERRUPTIBLE); 672 schedule_timeout(timeout); 673 674 return retval; 675 } 676 677 /* 678 * Sends an associate packet to the iMON 2.4G. 679 * 680 * This might not be such a good idea, since it has an id collision with 681 * some versions of the "IR & VFD" combo. The only way to determine if it 682 * is an RF version is to look at the product description string. (Which 683 * we currently do not fetch). 684 */ 685 static int send_associate_24g(struct imon_context *ictx) 686 { 687 int retval; 688 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00, 689 0x00, 0x00, 0x00, 0x20 }; 690 691 if (!ictx) { 692 pr_err("no context for device\n"); 693 return -ENODEV; 694 } 695 696 if (!ictx->dev_present_intf0) { 697 pr_err("no iMON device present\n"); 698 return -ENODEV; 699 } 700 701 memcpy(ictx->usb_tx_buf, packet, sizeof(packet)); 702 retval = send_packet(ictx); 703 704 return retval; 705 } 706 707 /* 708 * Sends packets to setup and show clock on iMON display 709 * 710 * Arguments: year - last 2 digits of year, month - 1..12, 711 * day - 1..31, dow - day of the week (0-Sun...6-Sat), 712 * hour - 0..23, minute - 0..59, second - 0..59 713 */ 714 static int send_set_imon_clock(struct imon_context *ictx, 715 unsigned int year, unsigned int month, 716 unsigned int day, unsigned int dow, 717 unsigned int hour, unsigned int minute, 718 unsigned int second) 719 { 720 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8]; 721 int retval = 0; 722 int i; 723 724 if (!ictx) { 725 pr_err("no context for device\n"); 726 return -ENODEV; 727 } 728 729 switch (ictx->display_type) { 730 case IMON_DISPLAY_TYPE_LCD: 731 clock_enable_pkt[0][0] = 0x80; 732 clock_enable_pkt[0][1] = year; 733 clock_enable_pkt[0][2] = month-1; 734 clock_enable_pkt[0][3] = day; 735 clock_enable_pkt[0][4] = hour; 736 clock_enable_pkt[0][5] = minute; 737 clock_enable_pkt[0][6] = second; 738 739 clock_enable_pkt[1][0] = 0x80; 740 clock_enable_pkt[1][1] = 0; 741 clock_enable_pkt[1][2] = 0; 742 clock_enable_pkt[1][3] = 0; 743 clock_enable_pkt[1][4] = 0; 744 clock_enable_pkt[1][5] = 0; 745 clock_enable_pkt[1][6] = 0; 746 747 if (ictx->product == 0xffdc) { 748 clock_enable_pkt[0][7] = 0x50; 749 clock_enable_pkt[1][7] = 0x51; 750 } else { 751 clock_enable_pkt[0][7] = 0x88; 752 clock_enable_pkt[1][7] = 0x8a; 753 } 754 755 break; 756 757 case IMON_DISPLAY_TYPE_VFD: 758 clock_enable_pkt[0][0] = year; 759 clock_enable_pkt[0][1] = month-1; 760 clock_enable_pkt[0][2] = day; 761 clock_enable_pkt[0][3] = dow; 762 clock_enable_pkt[0][4] = hour; 763 clock_enable_pkt[0][5] = minute; 764 clock_enable_pkt[0][6] = second; 765 clock_enable_pkt[0][7] = 0x40; 766 767 clock_enable_pkt[1][0] = 0; 768 clock_enable_pkt[1][1] = 0; 769 clock_enable_pkt[1][2] = 1; 770 clock_enable_pkt[1][3] = 0; 771 clock_enable_pkt[1][4] = 0; 772 clock_enable_pkt[1][5] = 0; 773 clock_enable_pkt[1][6] = 0; 774 clock_enable_pkt[1][7] = 0x42; 775 776 break; 777 778 default: 779 return -ENODEV; 780 } 781 782 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) { 783 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8); 784 retval = send_packet(ictx); 785 if (retval) { 786 pr_err("send_packet failed for packet %d\n", i); 787 break; 788 } 789 } 790 791 return retval; 792 } 793 794 /* 795 * These are the sysfs functions to handle the association on the iMON 2.4G LT. 796 */ 797 static ssize_t associate_remote_show(struct device *d, 798 struct device_attribute *attr, 799 char *buf) 800 { 801 struct imon_context *ictx = dev_get_drvdata(d); 802 803 if (!ictx) 804 return -ENODEV; 805 806 mutex_lock(&ictx->lock); 807 if (ictx->rf_isassociating) 808 strscpy(buf, "associating\n", PAGE_SIZE); 809 else 810 strscpy(buf, "closed\n", PAGE_SIZE); 811 812 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"); 813 mutex_unlock(&ictx->lock); 814 return strlen(buf); 815 } 816 817 static ssize_t associate_remote_store(struct device *d, 818 struct device_attribute *attr, 819 const char *buf, size_t count) 820 { 821 struct imon_context *ictx; 822 823 ictx = dev_get_drvdata(d); 824 825 if (!ictx) 826 return -ENODEV; 827 828 mutex_lock(&ictx->lock); 829 ictx->rf_isassociating = true; 830 send_associate_24g(ictx); 831 mutex_unlock(&ictx->lock); 832 833 return count; 834 } 835 836 /* 837 * sysfs functions to control internal imon clock 838 */ 839 static ssize_t imon_clock_show(struct device *d, 840 struct device_attribute *attr, char *buf) 841 { 842 struct imon_context *ictx = dev_get_drvdata(d); 843 size_t len; 844 845 if (!ictx) 846 return -ENODEV; 847 848 mutex_lock(&ictx->lock); 849 850 if (!ictx->display_supported) { 851 len = snprintf(buf, PAGE_SIZE, "Not supported."); 852 } else { 853 len = snprintf(buf, PAGE_SIZE, 854 "To set the clock on your iMON display:\n" 855 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n" 856 "%s", ictx->display_isopen ? 857 "\nNOTE: imon device must be closed\n" : ""); 858 } 859 860 mutex_unlock(&ictx->lock); 861 862 return len; 863 } 864 865 static ssize_t imon_clock_store(struct device *d, 866 struct device_attribute *attr, 867 const char *buf, size_t count) 868 { 869 struct imon_context *ictx = dev_get_drvdata(d); 870 ssize_t retval; 871 unsigned int year, month, day, dow, hour, minute, second; 872 873 if (!ictx) 874 return -ENODEV; 875 876 mutex_lock(&ictx->lock); 877 878 if (!ictx->display_supported) { 879 retval = -ENODEV; 880 goto exit; 881 } else if (ictx->display_isopen) { 882 retval = -EBUSY; 883 goto exit; 884 } 885 886 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow, 887 &hour, &minute, &second) != 7) { 888 retval = -EINVAL; 889 goto exit; 890 } 891 892 if ((month < 1 || month > 12) || 893 (day < 1 || day > 31) || (dow > 6) || 894 (hour > 23) || (minute > 59) || (second > 59)) { 895 retval = -EINVAL; 896 goto exit; 897 } 898 899 retval = send_set_imon_clock(ictx, year, month, day, dow, 900 hour, minute, second); 901 if (retval) 902 goto exit; 903 904 retval = count; 905 exit: 906 mutex_unlock(&ictx->lock); 907 908 return retval; 909 } 910 911 912 static DEVICE_ATTR_RW(imon_clock); 913 static DEVICE_ATTR_RW(associate_remote); 914 915 static struct attribute *imon_display_sysfs_entries[] = { 916 &dev_attr_imon_clock.attr, 917 NULL 918 }; 919 920 static const struct attribute_group imon_display_attr_group = { 921 .attrs = imon_display_sysfs_entries 922 }; 923 924 static struct attribute *imon_rf_sysfs_entries[] = { 925 &dev_attr_associate_remote.attr, 926 NULL 927 }; 928 929 static const struct attribute_group imon_rf_attr_group = { 930 .attrs = imon_rf_sysfs_entries 931 }; 932 933 /* 934 * Writes data to the VFD. The iMON VFD is 2x16 characters 935 * and requires data in 5 consecutive USB interrupt packets, 936 * each packet but the last carrying 7 bytes. 937 * 938 * I don't know if the VFD board supports features such as 939 * scrolling, clearing rows, blanking, etc. so at 940 * the caller must provide a full screen of data. If fewer 941 * than 32 bytes are provided spaces will be appended to 942 * generate a full screen. 943 */ 944 static ssize_t vfd_write(struct file *file, const char __user *buf, 945 size_t n_bytes, loff_t *pos) 946 { 947 int i; 948 int offset; 949 int seq; 950 int retval = 0; 951 struct imon_context *ictx = file->private_data; 952 static const unsigned char vfd_packet6[] = { 953 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; 954 955 if (ictx->disconnected) 956 return -ENODEV; 957 958 mutex_lock(&ictx->lock); 959 960 if (!ictx->dev_present_intf0) { 961 pr_err_ratelimited("no iMON device present\n"); 962 retval = -ENODEV; 963 goto exit; 964 } 965 966 if (n_bytes <= 0 || n_bytes > 32) { 967 pr_err_ratelimited("invalid payload size\n"); 968 retval = -EINVAL; 969 goto exit; 970 } 971 972 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) { 973 retval = -EFAULT; 974 goto exit; 975 } 976 977 /* Pad with spaces */ 978 for (i = n_bytes; i < 32; ++i) 979 ictx->tx.data_buf[i] = ' '; 980 981 for (i = 32; i < 35; ++i) 982 ictx->tx.data_buf[i] = 0xFF; 983 984 offset = 0; 985 seq = 0; 986 987 do { 988 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7); 989 ictx->usb_tx_buf[7] = (unsigned char) seq; 990 991 retval = send_packet(ictx); 992 if (retval) { 993 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 994 goto exit; 995 } else { 996 seq += 2; 997 offset += 7; 998 } 999 1000 } while (offset < 35); 1001 1002 /* Send packet #6 */ 1003 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); 1004 ictx->usb_tx_buf[7] = (unsigned char) seq; 1005 retval = send_packet(ictx); 1006 if (retval) 1007 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 1008 1009 exit: 1010 mutex_unlock(&ictx->lock); 1011 1012 return (!retval) ? n_bytes : retval; 1013 } 1014 1015 /* 1016 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte 1017 * packets. We accept data as 16 hexadecimal digits, followed by a 1018 * newline (to make it easy to drive the device from a command-line 1019 * -- even though the actual binary data is a bit complicated). 1020 * 1021 * The device itself is not a "traditional" text-mode display. It's 1022 * actually a 16x96 pixel bitmap display. That means if you want to 1023 * display text, you've got to have your own "font" and translate the 1024 * text into bitmaps for display. This is really flexible (you can 1025 * display whatever diacritics you need, and so on), but it's also 1026 * a lot more complicated than most LCDs... 1027 */ 1028 static ssize_t lcd_write(struct file *file, const char __user *buf, 1029 size_t n_bytes, loff_t *pos) 1030 { 1031 int retval = 0; 1032 struct imon_context *ictx = file->private_data; 1033 1034 if (ictx->disconnected) 1035 return -ENODEV; 1036 1037 mutex_lock(&ictx->lock); 1038 1039 if (!ictx->display_supported) { 1040 pr_err_ratelimited("no iMON display present\n"); 1041 retval = -ENODEV; 1042 goto exit; 1043 } 1044 1045 if (n_bytes != 8) { 1046 pr_err_ratelimited("invalid payload size: %d (expected 8)\n", 1047 (int)n_bytes); 1048 retval = -EINVAL; 1049 goto exit; 1050 } 1051 1052 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) { 1053 retval = -EFAULT; 1054 goto exit; 1055 } 1056 1057 retval = send_packet(ictx); 1058 if (retval) { 1059 pr_err_ratelimited("send packet failed!\n"); 1060 goto exit; 1061 } else { 1062 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n", 1063 __func__, (int) n_bytes); 1064 } 1065 exit: 1066 mutex_unlock(&ictx->lock); 1067 return (!retval) ? n_bytes : retval; 1068 } 1069 1070 /* 1071 * Callback function for USB core API: transmit data 1072 */ 1073 static void usb_tx_callback(struct urb *urb) 1074 { 1075 struct imon_context *ictx; 1076 1077 if (!urb) 1078 return; 1079 ictx = (struct imon_context *)urb->context; 1080 if (!ictx) 1081 return; 1082 1083 ictx->tx.status = urb->status; 1084 1085 /* notify waiters that write has finished */ 1086 ictx->tx.busy = false; 1087 smp_rmb(); /* ensure later readers know we're not busy */ 1088 complete(&ictx->tx.finished); 1089 } 1090 1091 /* 1092 * report touchscreen input 1093 */ 1094 static void imon_touch_display_timeout(struct timer_list *t) 1095 { 1096 struct imon_context *ictx = from_timer(ictx, t, ttimer); 1097 1098 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA) 1099 return; 1100 1101 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1102 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1103 input_report_key(ictx->touch, BTN_TOUCH, 0x00); 1104 input_sync(ictx->touch); 1105 } 1106 1107 /* 1108 * iMON IR receivers support two different signal sets -- those used by 1109 * the iMON remotes, and those used by the Windows MCE remotes (which is 1110 * really just RC-6), but only one or the other at a time, as the signals 1111 * are decoded onboard the receiver. 1112 * 1113 * This function gets called two different ways, one way is from 1114 * rc_register_device, for initial protocol selection/setup, and the other is 1115 * via a userspace-initiated protocol change request, either by direct sysfs 1116 * prodding or by something like ir-keytable. In the rc_register_device case, 1117 * the imon context lock is already held, but when initiated from userspace, 1118 * it is not, so we must acquire it prior to calling send_packet, which 1119 * requires that the lock is held. 1120 */ 1121 static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto) 1122 { 1123 int retval; 1124 struct imon_context *ictx = rc->priv; 1125 struct device *dev = ictx->dev; 1126 bool unlock = false; 1127 unsigned char ir_proto_packet[] = { 1128 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 }; 1129 1130 if (*rc_proto && !(*rc_proto & rc->allowed_protocols)) 1131 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n"); 1132 1133 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) { 1134 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n"); 1135 ir_proto_packet[0] = 0x01; 1136 *rc_proto = RC_PROTO_BIT_RC6_MCE; 1137 } else if (*rc_proto & RC_PROTO_BIT_IMON) { 1138 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n"); 1139 if (!pad_stabilize) 1140 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1141 /* ir_proto_packet[0] = 0x00; // already the default */ 1142 *rc_proto = RC_PROTO_BIT_IMON; 1143 } else { 1144 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n"); 1145 if (!pad_stabilize) 1146 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1147 /* ir_proto_packet[0] = 0x00; // already the default */ 1148 *rc_proto = RC_PROTO_BIT_IMON; 1149 } 1150 1151 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet)); 1152 1153 if (!mutex_is_locked(&ictx->lock)) { 1154 unlock = true; 1155 mutex_lock(&ictx->lock); 1156 } 1157 1158 retval = send_packet(ictx); 1159 if (retval) 1160 goto out; 1161 1162 ictx->rc_proto = *rc_proto; 1163 ictx->pad_mouse = false; 1164 1165 out: 1166 if (unlock) 1167 mutex_unlock(&ictx->lock); 1168 1169 return retval; 1170 } 1171 1172 /* 1173 * The directional pad behaves a bit differently, depending on whether this is 1174 * one of the older ffdc devices or a newer device. Newer devices appear to 1175 * have a higher resolution matrix for more precise mouse movement, but it 1176 * makes things overly sensitive in keyboard mode, so we do some interesting 1177 * contortions to make it less touchy. Older devices run through the same 1178 * routine with shorter timeout and a smaller threshold. 1179 */ 1180 static int stabilize(int a, int b, u16 timeout, u16 threshold) 1181 { 1182 ktime_t ct; 1183 static ktime_t prev_time; 1184 static ktime_t hit_time; 1185 static int x, y, prev_result, hits; 1186 int result = 0; 1187 long msec, msec_hit; 1188 1189 ct = ktime_get(); 1190 msec = ktime_ms_delta(ct, prev_time); 1191 msec_hit = ktime_ms_delta(ct, hit_time); 1192 1193 if (msec > 100) { 1194 x = 0; 1195 y = 0; 1196 hits = 0; 1197 } 1198 1199 x += a; 1200 y += b; 1201 1202 prev_time = ct; 1203 1204 if (abs(x) > threshold || abs(y) > threshold) { 1205 if (abs(y) > abs(x)) 1206 result = (y > 0) ? 0x7F : 0x80; 1207 else 1208 result = (x > 0) ? 0x7F00 : 0x8000; 1209 1210 x = 0; 1211 y = 0; 1212 1213 if (result == prev_result) { 1214 hits++; 1215 1216 if (hits > 3) { 1217 switch (result) { 1218 case 0x7F: 1219 y = 17 * threshold / 30; 1220 break; 1221 case 0x80: 1222 y -= 17 * threshold / 30; 1223 break; 1224 case 0x7F00: 1225 x = 17 * threshold / 30; 1226 break; 1227 case 0x8000: 1228 x -= 17 * threshold / 30; 1229 break; 1230 } 1231 } 1232 1233 if (hits == 2 && msec_hit < timeout) { 1234 result = 0; 1235 hits = 1; 1236 } 1237 } else { 1238 prev_result = result; 1239 hits = 1; 1240 hit_time = ct; 1241 } 1242 } 1243 1244 return result; 1245 } 1246 1247 static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode) 1248 { 1249 u32 keycode; 1250 u32 release; 1251 bool is_release_code = false; 1252 1253 /* Look for the initial press of a button */ 1254 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1255 ictx->rc_toggle = 0x0; 1256 ictx->rc_scancode = scancode; 1257 1258 /* Look for the release of a button */ 1259 if (keycode == KEY_RESERVED) { 1260 release = scancode & ~0x4000; 1261 keycode = rc_g_keycode_from_table(ictx->rdev, release); 1262 if (keycode != KEY_RESERVED) 1263 is_release_code = true; 1264 } 1265 1266 ictx->release_code = is_release_code; 1267 1268 return keycode; 1269 } 1270 1271 static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode) 1272 { 1273 u32 keycode; 1274 1275 #define MCE_KEY_MASK 0x7000 1276 #define MCE_TOGGLE_BIT 0x8000 1277 1278 /* 1279 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx 1280 * (the toggle bit flipping between alternating key presses), while 1281 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep 1282 * the table trim, we always or in the bits to look up 0x8000ff4xx, 1283 * but we can't or them into all codes, as some keys are decoded in 1284 * a different way w/o the same use of the toggle bit... 1285 */ 1286 if (scancode & 0x80000000) 1287 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT; 1288 1289 ictx->rc_scancode = scancode; 1290 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1291 1292 /* not used in mce mode, but make sure we know its false */ 1293 ictx->release_code = false; 1294 1295 return keycode; 1296 } 1297 1298 static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code) 1299 { 1300 const struct imon_panel_key_table *key_table; 1301 u32 keycode = KEY_RESERVED; 1302 int i; 1303 1304 key_table = ictx->dev_descr->key_table; 1305 1306 for (i = 0; key_table[i].hw_code != 0; i++) { 1307 if (key_table[i].hw_code == (code | 0xffee)) { 1308 keycode = key_table[i].keycode; 1309 break; 1310 } 1311 } 1312 ictx->release_code = false; 1313 return keycode; 1314 } 1315 1316 static bool imon_mouse_event(struct imon_context *ictx, 1317 unsigned char *buf, int len) 1318 { 1319 signed char rel_x = 0x00, rel_y = 0x00; 1320 u8 right_shift = 1; 1321 bool mouse_input = true; 1322 int dir = 0; 1323 unsigned long flags; 1324 1325 spin_lock_irqsave(&ictx->kc_lock, flags); 1326 1327 /* newer iMON device PAD or mouse button */ 1328 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) { 1329 rel_x = buf[2]; 1330 rel_y = buf[3]; 1331 right_shift = 1; 1332 /* 0xffdc iMON PAD or mouse button input */ 1333 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) && 1334 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) { 1335 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1336 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1337 if (buf[0] & 0x02) 1338 rel_x |= ~0x0f; 1339 rel_x = rel_x + rel_x / 2; 1340 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1341 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1342 if (buf[0] & 0x01) 1343 rel_y |= ~0x0f; 1344 rel_y = rel_y + rel_y / 2; 1345 right_shift = 2; 1346 /* some ffdc devices decode mouse buttons differently... */ 1347 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) { 1348 right_shift = 2; 1349 /* ch+/- buttons, which we use for an emulated scroll wheel */ 1350 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) { 1351 dir = 1; 1352 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) { 1353 dir = -1; 1354 } else 1355 mouse_input = false; 1356 1357 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1358 1359 if (mouse_input) { 1360 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n"); 1361 1362 if (dir) { 1363 input_report_rel(ictx->idev, REL_WHEEL, dir); 1364 } else if (rel_x || rel_y) { 1365 input_report_rel(ictx->idev, REL_X, rel_x); 1366 input_report_rel(ictx->idev, REL_Y, rel_y); 1367 } else { 1368 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1); 1369 input_report_key(ictx->idev, BTN_RIGHT, 1370 buf[1] >> right_shift & 0x1); 1371 } 1372 input_sync(ictx->idev); 1373 spin_lock_irqsave(&ictx->kc_lock, flags); 1374 ictx->last_keycode = ictx->kc; 1375 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1376 } 1377 1378 return mouse_input; 1379 } 1380 1381 static void imon_touch_event(struct imon_context *ictx, unsigned char *buf) 1382 { 1383 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT); 1384 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4); 1385 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf)); 1386 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1387 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1388 input_report_key(ictx->touch, BTN_TOUCH, 0x01); 1389 input_sync(ictx->touch); 1390 } 1391 1392 static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf) 1393 { 1394 int dir = 0; 1395 signed char rel_x = 0x00, rel_y = 0x00; 1396 u16 timeout, threshold; 1397 u32 scancode = KEY_RESERVED; 1398 unsigned long flags; 1399 1400 /* 1401 * The imon directional pad functions more like a touchpad. Bytes 3 & 4 1402 * contain a position coordinate (x,y), with each component ranging 1403 * from -14 to 14. We want to down-sample this to only 4 discrete values 1404 * for up/down/left/right arrow keys. Also, when you get too close to 1405 * diagonals, it has a tendency to jump back and forth, so lets try to 1406 * ignore when they get too close. 1407 */ 1408 if (ictx->product != 0xffdc) { 1409 /* first, pad to 8 bytes so it conforms with everything else */ 1410 buf[5] = buf[6] = buf[7] = 0; 1411 timeout = 500; /* in msecs */ 1412 /* (2*threshold) x (2*threshold) square */ 1413 threshold = pad_thresh ? pad_thresh : 28; 1414 rel_x = buf[2]; 1415 rel_y = buf[3]; 1416 1417 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1418 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) { 1419 dir = stabilize((int)rel_x, (int)rel_y, 1420 timeout, threshold); 1421 if (!dir) { 1422 spin_lock_irqsave(&ictx->kc_lock, 1423 flags); 1424 ictx->kc = KEY_UNKNOWN; 1425 spin_unlock_irqrestore(&ictx->kc_lock, 1426 flags); 1427 return; 1428 } 1429 buf[2] = dir & 0xFF; 1430 buf[3] = (dir >> 8) & 0xFF; 1431 scancode = be32_to_cpu(*((__be32 *)buf)); 1432 } 1433 } else { 1434 /* 1435 * Hack alert: instead of using keycodes, we have 1436 * to use hard-coded scancodes here... 1437 */ 1438 if (abs(rel_y) > abs(rel_x)) { 1439 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1440 buf[3] = 0; 1441 if (rel_y > 0) 1442 scancode = 0x01007f00; /* KEY_DOWN */ 1443 else 1444 scancode = 0x01008000; /* KEY_UP */ 1445 } else { 1446 buf[2] = 0; 1447 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1448 if (rel_x > 0) 1449 scancode = 0x0100007f; /* KEY_RIGHT */ 1450 else 1451 scancode = 0x01000080; /* KEY_LEFT */ 1452 } 1453 } 1454 1455 /* 1456 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad 1457 * device (15c2:ffdc). The remote generates various codes from 1458 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates 1459 * 0x688301b7 and the right one 0x688481b7. All other keys generate 1460 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with 1461 * reversed endianness. Extract direction from buffer, rotate endianness, 1462 * adjust sign and feed the values into stabilize(). The resulting codes 1463 * will be 0x01008000, 0x01007F00, which match the newer devices. 1464 */ 1465 } else { 1466 timeout = 10; /* in msecs */ 1467 /* (2*threshold) x (2*threshold) square */ 1468 threshold = pad_thresh ? pad_thresh : 15; 1469 1470 /* buf[1] is x */ 1471 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1472 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1473 if (buf[0] & 0x02) 1474 rel_x |= ~0x10+1; 1475 /* buf[2] is y */ 1476 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1477 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1478 if (buf[0] & 0x01) 1479 rel_y |= ~0x10+1; 1480 1481 buf[0] = 0x01; 1482 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0; 1483 1484 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1485 dir = stabilize((int)rel_x, (int)rel_y, 1486 timeout, threshold); 1487 if (!dir) { 1488 spin_lock_irqsave(&ictx->kc_lock, flags); 1489 ictx->kc = KEY_UNKNOWN; 1490 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1491 return; 1492 } 1493 buf[2] = dir & 0xFF; 1494 buf[3] = (dir >> 8) & 0xFF; 1495 scancode = be32_to_cpu(*((__be32 *)buf)); 1496 } else { 1497 /* 1498 * Hack alert: instead of using keycodes, we have 1499 * to use hard-coded scancodes here... 1500 */ 1501 if (abs(rel_y) > abs(rel_x)) { 1502 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1503 buf[3] = 0; 1504 if (rel_y > 0) 1505 scancode = 0x01007f00; /* KEY_DOWN */ 1506 else 1507 scancode = 0x01008000; /* KEY_UP */ 1508 } else { 1509 buf[2] = 0; 1510 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1511 if (rel_x > 0) 1512 scancode = 0x0100007f; /* KEY_RIGHT */ 1513 else 1514 scancode = 0x01000080; /* KEY_LEFT */ 1515 } 1516 } 1517 } 1518 1519 if (scancode) { 1520 spin_lock_irqsave(&ictx->kc_lock, flags); 1521 ictx->kc = imon_remote_key_lookup(ictx, scancode); 1522 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1523 } 1524 } 1525 1526 /* 1527 * figure out if these is a press or a release. We don't actually 1528 * care about repeats, as those will be auto-generated within the IR 1529 * subsystem for repeating scancodes. 1530 */ 1531 static int imon_parse_press_type(struct imon_context *ictx, 1532 unsigned char *buf, u8 ktype) 1533 { 1534 int press_type = 0; 1535 unsigned long flags; 1536 1537 spin_lock_irqsave(&ictx->kc_lock, flags); 1538 1539 /* key release of 0x02XXXXXX key */ 1540 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00) 1541 ictx->kc = ictx->last_keycode; 1542 1543 /* mouse button release on (some) 0xffdc devices */ 1544 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 && 1545 buf[2] == 0x81 && buf[3] == 0xb7) 1546 ictx->kc = ictx->last_keycode; 1547 1548 /* mouse button release on (some other) 0xffdc devices */ 1549 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 && 1550 buf[2] == 0x81 && buf[3] == 0xb7) 1551 ictx->kc = ictx->last_keycode; 1552 1553 /* mce-specific button handling, no keyup events */ 1554 else if (ktype == IMON_KEY_MCE) { 1555 ictx->rc_toggle = buf[2]; 1556 press_type = 1; 1557 1558 /* incoherent or irrelevant data */ 1559 } else if (ictx->kc == KEY_RESERVED) 1560 press_type = -EINVAL; 1561 1562 /* key release of 0xXXXXXXb7 key */ 1563 else if (ictx->release_code) 1564 press_type = 0; 1565 1566 /* this is a button press */ 1567 else 1568 press_type = 1; 1569 1570 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1571 1572 return press_type; 1573 } 1574 1575 /* 1576 * Process the incoming packet 1577 */ 1578 static void imon_incoming_packet(struct imon_context *ictx, 1579 struct urb *urb, int intf) 1580 { 1581 int len = urb->actual_length; 1582 unsigned char *buf = urb->transfer_buffer; 1583 struct device *dev = ictx->dev; 1584 unsigned long flags; 1585 u32 kc; 1586 u64 scancode; 1587 int press_type = 0; 1588 ktime_t t; 1589 static ktime_t prev_time; 1590 u8 ktype; 1591 1592 /* filter out junk data on the older 0xffdc imon devices */ 1593 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff)) 1594 return; 1595 1596 /* Figure out what key was pressed */ 1597 if (len == 8 && buf[7] == 0xee) { 1598 scancode = be64_to_cpu(*((__be64 *)buf)); 1599 ktype = IMON_KEY_PANEL; 1600 kc = imon_panel_key_lookup(ictx, scancode); 1601 ictx->release_code = false; 1602 } else { 1603 scancode = be32_to_cpu(*((__be32 *)buf)); 1604 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) { 1605 ktype = IMON_KEY_IMON; 1606 if (buf[0] == 0x80) 1607 ktype = IMON_KEY_MCE; 1608 kc = imon_mce_key_lookup(ictx, scancode); 1609 } else { 1610 ktype = IMON_KEY_IMON; 1611 kc = imon_remote_key_lookup(ictx, scancode); 1612 } 1613 } 1614 1615 spin_lock_irqsave(&ictx->kc_lock, flags); 1616 /* keyboard/mouse mode toggle button */ 1617 if (kc == KEY_KEYBOARD && !ictx->release_code) { 1618 ictx->last_keycode = kc; 1619 if (!nomouse) { 1620 ictx->pad_mouse = !ictx->pad_mouse; 1621 dev_dbg(dev, "toggling to %s mode\n", 1622 ictx->pad_mouse ? "mouse" : "keyboard"); 1623 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1624 return; 1625 } else { 1626 ictx->pad_mouse = false; 1627 dev_dbg(dev, "mouse mode disabled, passing key value\n"); 1628 } 1629 } 1630 1631 ictx->kc = kc; 1632 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1633 1634 /* send touchscreen events through input subsystem if touchpad data */ 1635 if (ictx->touch && len == 8 && buf[7] == 0x86) { 1636 imon_touch_event(ictx, buf); 1637 return; 1638 1639 /* look for mouse events with pad in mouse mode */ 1640 } else if (ictx->pad_mouse) { 1641 if (imon_mouse_event(ictx, buf, len)) 1642 return; 1643 } 1644 1645 /* Now for some special handling to convert pad input to arrow keys */ 1646 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) || 1647 ((len == 8) && (buf[0] & 0x40) && 1648 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) { 1649 len = 8; 1650 imon_pad_to_keys(ictx, buf); 1651 } 1652 1653 if (debug) { 1654 printk(KERN_INFO "intf%d decoded packet: %*ph\n", 1655 intf, len, buf); 1656 } 1657 1658 press_type = imon_parse_press_type(ictx, buf, ktype); 1659 if (press_type < 0) 1660 goto not_input_data; 1661 1662 if (ktype != IMON_KEY_PANEL) { 1663 if (press_type == 0) 1664 rc_keyup(ictx->rdev); 1665 else { 1666 enum rc_proto proto; 1667 1668 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 1669 proto = RC_PROTO_RC6_MCE; 1670 else if (ictx->rc_proto == RC_PROTO_BIT_IMON) 1671 proto = RC_PROTO_IMON; 1672 else 1673 return; 1674 1675 rc_keydown(ictx->rdev, proto, ictx->rc_scancode, 1676 ictx->rc_toggle); 1677 1678 spin_lock_irqsave(&ictx->kc_lock, flags); 1679 ictx->last_keycode = ictx->kc; 1680 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1681 } 1682 return; 1683 } 1684 1685 /* Only panel type events left to process now */ 1686 spin_lock_irqsave(&ictx->kc_lock, flags); 1687 1688 t = ktime_get(); 1689 /* KEY repeats from knob and panel that need to be suppressed */ 1690 if (ictx->kc == KEY_MUTE || 1691 ictx->dev_descr->flags & IMON_SUPPRESS_REPEATED_KEYS) { 1692 if (ictx->kc == ictx->last_keycode && 1693 ktime_ms_delta(t, prev_time) < ictx->idev->rep[REP_DELAY]) { 1694 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1695 return; 1696 } 1697 } 1698 1699 prev_time = t; 1700 kc = ictx->kc; 1701 1702 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1703 1704 input_report_key(ictx->idev, kc, press_type); 1705 input_sync(ictx->idev); 1706 1707 /* panel keys don't generate a release */ 1708 input_report_key(ictx->idev, kc, 0); 1709 input_sync(ictx->idev); 1710 1711 spin_lock_irqsave(&ictx->kc_lock, flags); 1712 ictx->last_keycode = kc; 1713 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1714 1715 return; 1716 1717 not_input_data: 1718 if (len != 8) { 1719 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n", 1720 __func__, len, intf); 1721 return; 1722 } 1723 1724 /* iMON 2.4G associate frame */ 1725 if (buf[0] == 0x00 && 1726 buf[2] == 0xFF && /* REFID */ 1727 buf[3] == 0xFF && 1728 buf[4] == 0xFF && 1729 buf[5] == 0xFF && /* iMON 2.4G */ 1730 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */ 1731 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */ 1732 dev_warn(dev, "%s: remote associated refid=%02X\n", 1733 __func__, buf[1]); 1734 ictx->rf_isassociating = false; 1735 } 1736 } 1737 1738 /* 1739 * Callback function for USB core API: receive data 1740 */ 1741 static void usb_rx_callback_intf0(struct urb *urb) 1742 { 1743 struct imon_context *ictx; 1744 int intfnum = 0; 1745 1746 if (!urb) 1747 return; 1748 1749 ictx = (struct imon_context *)urb->context; 1750 if (!ictx) 1751 return; 1752 1753 /* 1754 * if we get a callback before we're done configuring the hardware, we 1755 * can't yet process the data, as there's nowhere to send it, but we 1756 * still need to submit a new rx URB to avoid wedging the hardware 1757 */ 1758 if (!ictx->dev_present_intf0) 1759 goto out; 1760 1761 switch (urb->status) { 1762 case -ENOENT: /* usbcore unlink successful! */ 1763 return; 1764 1765 case -ESHUTDOWN: /* transport endpoint was shut down */ 1766 break; 1767 1768 case 0: 1769 imon_incoming_packet(ictx, urb, intfnum); 1770 break; 1771 1772 default: 1773 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1774 __func__, urb->status); 1775 break; 1776 } 1777 1778 out: 1779 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 1780 } 1781 1782 static void usb_rx_callback_intf1(struct urb *urb) 1783 { 1784 struct imon_context *ictx; 1785 int intfnum = 1; 1786 1787 if (!urb) 1788 return; 1789 1790 ictx = (struct imon_context *)urb->context; 1791 if (!ictx) 1792 return; 1793 1794 /* 1795 * if we get a callback before we're done configuring the hardware, we 1796 * can't yet process the data, as there's nowhere to send it, but we 1797 * still need to submit a new rx URB to avoid wedging the hardware 1798 */ 1799 if (!ictx->dev_present_intf1) 1800 goto out; 1801 1802 switch (urb->status) { 1803 case -ENOENT: /* usbcore unlink successful! */ 1804 return; 1805 1806 case -ESHUTDOWN: /* transport endpoint was shut down */ 1807 break; 1808 1809 case 0: 1810 imon_incoming_packet(ictx, urb, intfnum); 1811 break; 1812 1813 default: 1814 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1815 __func__, urb->status); 1816 break; 1817 } 1818 1819 out: 1820 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 1821 } 1822 1823 /* 1824 * The 0x15c2:0xffdc device ID was used for umpteen different imon 1825 * devices, and all of them constantly spew interrupts, even when there 1826 * is no actual data to report. However, byte 6 of this buffer looks like 1827 * its unique across device variants, so we're trying to key off that to 1828 * figure out which display type (if any) and what IR protocol the device 1829 * actually supports. These devices have their IR protocol hard-coded into 1830 * their firmware, they can't be changed on the fly like the newer hardware. 1831 */ 1832 static void imon_get_ffdc_type(struct imon_context *ictx) 1833 { 1834 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6]; 1835 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE; 1836 u64 allowed_protos = RC_PROTO_BIT_IMON; 1837 1838 switch (ffdc_cfg_byte) { 1839 /* iMON Knob, no display, iMON IR + vol knob */ 1840 case 0x21: 1841 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR"); 1842 ictx->display_supported = false; 1843 break; 1844 /* iMON 2.4G LT (usb stick), no display, iMON RF */ 1845 case 0x4e: 1846 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF"); 1847 ictx->display_supported = false; 1848 ictx->rf_device = true; 1849 break; 1850 /* iMON VFD, no IR (does have vol knob tho) */ 1851 case 0x35: 1852 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR"); 1853 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1854 break; 1855 /* iMON VFD, iMON IR */ 1856 case 0x24: 1857 case 0x30: 1858 case 0x85: 1859 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR"); 1860 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1861 break; 1862 /* iMON VFD, MCE IR */ 1863 case 0x46: 1864 case 0x9e: 1865 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR"); 1866 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1867 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1868 break; 1869 /* iMON VFD, iMON or MCE IR */ 1870 case 0x7e: 1871 dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR"); 1872 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1873 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1874 break; 1875 /* iMON LCD, MCE IR */ 1876 case 0x9f: 1877 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR"); 1878 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1879 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1880 break; 1881 /* no display, iMON IR */ 1882 case 0x26: 1883 dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR"); 1884 ictx->display_supported = false; 1885 break; 1886 /* Soundgraph iMON UltraBay */ 1887 case 0x98: 1888 dev_info(ictx->dev, "0xffdc iMON UltraBay, LCD + IR"); 1889 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1890 allowed_protos = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 1891 ictx->dev_descr = &ultrabay_table; 1892 break; 1893 1894 default: 1895 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR"); 1896 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1897 /* 1898 * We don't know which one it is, allow user to set the 1899 * RC6 one from userspace if IMON wasn't correct. 1900 */ 1901 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1902 break; 1903 } 1904 1905 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte); 1906 1907 ictx->display_type = detected_display_type; 1908 ictx->rc_proto = allowed_protos; 1909 } 1910 1911 static void imon_set_display_type(struct imon_context *ictx) 1912 { 1913 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1914 1915 /* 1916 * Try to auto-detect the type of display if the user hasn't set 1917 * it by hand via the display_type modparam. Default is VFD. 1918 */ 1919 1920 if (display_type == IMON_DISPLAY_TYPE_AUTO) { 1921 switch (ictx->product) { 1922 case 0xffdc: 1923 /* set in imon_get_ffdc_type() */ 1924 configured_display_type = ictx->display_type; 1925 break; 1926 case 0x0034: 1927 case 0x0035: 1928 configured_display_type = IMON_DISPLAY_TYPE_VGA; 1929 break; 1930 case 0x0038: 1931 case 0x0039: 1932 case 0x0045: 1933 configured_display_type = IMON_DISPLAY_TYPE_LCD; 1934 break; 1935 case 0x003c: 1936 case 0x0041: 1937 case 0x0042: 1938 case 0x0043: 1939 configured_display_type = IMON_DISPLAY_TYPE_NONE; 1940 ictx->display_supported = false; 1941 break; 1942 case 0x0036: 1943 case 0x0044: 1944 default: 1945 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1946 break; 1947 } 1948 } else { 1949 configured_display_type = display_type; 1950 if (display_type == IMON_DISPLAY_TYPE_NONE) 1951 ictx->display_supported = false; 1952 else 1953 ictx->display_supported = true; 1954 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n", 1955 __func__, display_type); 1956 } 1957 1958 ictx->display_type = configured_display_type; 1959 } 1960 1961 static struct rc_dev *imon_init_rdev(struct imon_context *ictx) 1962 { 1963 struct rc_dev *rdev; 1964 int ret; 1965 static const unsigned char fp_packet[] = { 1966 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 }; 1967 1968 rdev = rc_allocate_device(RC_DRIVER_SCANCODE); 1969 if (!rdev) { 1970 dev_err(ictx->dev, "remote control dev allocation failed\n"); 1971 goto out; 1972 } 1973 1974 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev), 1975 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product); 1976 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev, 1977 sizeof(ictx->phys_rdev)); 1978 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev)); 1979 1980 rdev->device_name = ictx->name_rdev; 1981 rdev->input_phys = ictx->phys_rdev; 1982 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id); 1983 rdev->dev.parent = ictx->dev; 1984 1985 rdev->priv = ictx; 1986 /* iMON PAD or MCE */ 1987 rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 1988 rdev->change_protocol = imon_ir_change_protocol; 1989 rdev->driver_name = MOD_NAME; 1990 1991 /* Enable front-panel buttons and/or knobs */ 1992 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet)); 1993 ret = send_packet(ictx); 1994 /* Not fatal, but warn about it */ 1995 if (ret) 1996 dev_info(ictx->dev, "panel buttons/knobs setup failed\n"); 1997 1998 if (ictx->product == 0xffdc) { 1999 imon_get_ffdc_type(ictx); 2000 rdev->allowed_protocols = ictx->rc_proto; 2001 } 2002 2003 imon_set_display_type(ictx); 2004 2005 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 2006 rdev->map_name = RC_MAP_IMON_MCE; 2007 else 2008 rdev->map_name = RC_MAP_IMON_PAD; 2009 2010 ret = rc_register_device(rdev); 2011 if (ret < 0) { 2012 dev_err(ictx->dev, "remote input dev register failed\n"); 2013 goto out; 2014 } 2015 2016 return rdev; 2017 2018 out: 2019 rc_free_device(rdev); 2020 return NULL; 2021 } 2022 2023 static struct input_dev *imon_init_idev(struct imon_context *ictx) 2024 { 2025 const struct imon_panel_key_table *key_table; 2026 struct input_dev *idev; 2027 int ret, i; 2028 2029 key_table = ictx->dev_descr->key_table; 2030 2031 idev = input_allocate_device(); 2032 if (!idev) 2033 goto out; 2034 2035 snprintf(ictx->name_idev, sizeof(ictx->name_idev), 2036 "iMON Panel, Knob and Mouse(%04x:%04x)", 2037 ictx->vendor, ictx->product); 2038 idev->name = ictx->name_idev; 2039 2040 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev, 2041 sizeof(ictx->phys_idev)); 2042 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev)); 2043 idev->phys = ictx->phys_idev; 2044 2045 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL); 2046 2047 idev->keybit[BIT_WORD(BTN_MOUSE)] = 2048 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2049 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | 2050 BIT_MASK(REL_WHEEL); 2051 2052 /* panel and/or knob code support */ 2053 for (i = 0; key_table[i].hw_code != 0; i++) { 2054 u32 kc = key_table[i].keycode; 2055 __set_bit(kc, idev->keybit); 2056 } 2057 2058 usb_to_input_id(ictx->usbdev_intf0, &idev->id); 2059 idev->dev.parent = ictx->dev; 2060 input_set_drvdata(idev, ictx); 2061 2062 ret = input_register_device(idev); 2063 if (ret < 0) { 2064 dev_err(ictx->dev, "input dev register failed\n"); 2065 goto out; 2066 } 2067 2068 return idev; 2069 2070 out: 2071 input_free_device(idev); 2072 return NULL; 2073 } 2074 2075 static struct input_dev *imon_init_touch(struct imon_context *ictx) 2076 { 2077 struct input_dev *touch; 2078 int ret; 2079 2080 touch = input_allocate_device(); 2081 if (!touch) 2082 goto touch_alloc_failed; 2083 2084 snprintf(ictx->name_touch, sizeof(ictx->name_touch), 2085 "iMON USB Touchscreen (%04x:%04x)", 2086 ictx->vendor, ictx->product); 2087 touch->name = ictx->name_touch; 2088 2089 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch, 2090 sizeof(ictx->phys_touch)); 2091 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch)); 2092 touch->phys = ictx->phys_touch; 2093 2094 touch->evbit[0] = 2095 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 2096 touch->keybit[BIT_WORD(BTN_TOUCH)] = 2097 BIT_MASK(BTN_TOUCH); 2098 input_set_abs_params(touch, ABS_X, 2099 0x00, 0xfff, 0, 0); 2100 input_set_abs_params(touch, ABS_Y, 2101 0x00, 0xfff, 0, 0); 2102 2103 input_set_drvdata(touch, ictx); 2104 2105 usb_to_input_id(ictx->usbdev_intf1, &touch->id); 2106 touch->dev.parent = ictx->dev; 2107 ret = input_register_device(touch); 2108 if (ret < 0) { 2109 dev_info(ictx->dev, "touchscreen input dev register failed\n"); 2110 goto touch_register_failed; 2111 } 2112 2113 return touch; 2114 2115 touch_register_failed: 2116 input_free_device(touch); 2117 2118 touch_alloc_failed: 2119 return NULL; 2120 } 2121 2122 static bool imon_find_endpoints(struct imon_context *ictx, 2123 struct usb_host_interface *iface_desc) 2124 { 2125 struct usb_endpoint_descriptor *ep; 2126 struct usb_endpoint_descriptor *rx_endpoint = NULL; 2127 struct usb_endpoint_descriptor *tx_endpoint = NULL; 2128 int ifnum = iface_desc->desc.bInterfaceNumber; 2129 int num_endpts = iface_desc->desc.bNumEndpoints; 2130 int i, ep_dir, ep_type; 2131 bool ir_ep_found = false; 2132 bool display_ep_found = false; 2133 bool tx_control = false; 2134 2135 /* 2136 * Scan the endpoint list and set: 2137 * first input endpoint = IR endpoint 2138 * first output endpoint = display endpoint 2139 */ 2140 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) { 2141 ep = &iface_desc->endpoint[i].desc; 2142 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; 2143 ep_type = usb_endpoint_type(ep); 2144 2145 if (!ir_ep_found && ep_dir == USB_DIR_IN && 2146 ep_type == USB_ENDPOINT_XFER_INT) { 2147 2148 rx_endpoint = ep; 2149 ir_ep_found = true; 2150 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__); 2151 2152 } else if (!display_ep_found && ep_dir == USB_DIR_OUT && 2153 ep_type == USB_ENDPOINT_XFER_INT) { 2154 tx_endpoint = ep; 2155 display_ep_found = true; 2156 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__); 2157 } 2158 } 2159 2160 if (ifnum == 0) { 2161 ictx->rx_endpoint_intf0 = rx_endpoint; 2162 /* 2163 * tx is used to send characters to lcd/vfd, associate RF 2164 * remotes, set IR protocol, and maybe more... 2165 */ 2166 ictx->tx_endpoint = tx_endpoint; 2167 } else { 2168 ictx->rx_endpoint_intf1 = rx_endpoint; 2169 } 2170 2171 /* 2172 * If we didn't find a display endpoint, this is probably one of the 2173 * newer iMON devices that use control urb instead of interrupt 2174 */ 2175 if (!display_ep_found) { 2176 tx_control = true; 2177 display_ep_found = true; 2178 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n", 2179 __func__); 2180 } 2181 2182 /* 2183 * Some iMON receivers have no display. Unfortunately, it seems 2184 * that SoundGraph recycles device IDs between devices both with 2185 * and without... :\ 2186 */ 2187 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) { 2188 display_ep_found = false; 2189 dev_dbg(ictx->dev, "%s: device has no display\n", __func__); 2190 } 2191 2192 /* 2193 * iMON Touch devices have a VGA touchscreen, but no "display", as 2194 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD). 2195 */ 2196 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2197 display_ep_found = false; 2198 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__); 2199 } 2200 2201 /* Input endpoint is mandatory */ 2202 if (!ir_ep_found) 2203 pr_err("no valid input (IR) endpoint found\n"); 2204 2205 ictx->tx_control = tx_control; 2206 2207 if (display_ep_found) 2208 ictx->display_supported = true; 2209 2210 return ir_ep_found; 2211 2212 } 2213 2214 static struct imon_context *imon_init_intf0(struct usb_interface *intf, 2215 const struct usb_device_id *id) 2216 { 2217 struct imon_context *ictx; 2218 struct urb *rx_urb; 2219 struct urb *tx_urb; 2220 struct device *dev = &intf->dev; 2221 struct usb_host_interface *iface_desc; 2222 int ret = -ENOMEM; 2223 2224 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL); 2225 if (!ictx) 2226 goto exit; 2227 2228 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2229 if (!rx_urb) 2230 goto rx_urb_alloc_failed; 2231 tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2232 if (!tx_urb) 2233 goto tx_urb_alloc_failed; 2234 2235 mutex_init(&ictx->lock); 2236 spin_lock_init(&ictx->kc_lock); 2237 2238 mutex_lock(&ictx->lock); 2239 2240 ictx->dev = dev; 2241 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf)); 2242 ictx->rx_urb_intf0 = rx_urb; 2243 ictx->tx_urb = tx_urb; 2244 ictx->rf_device = false; 2245 2246 init_completion(&ictx->tx.finished); 2247 2248 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor); 2249 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct); 2250 2251 /* save drive info for later accessing the panel/knob key table */ 2252 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info; 2253 /* default send_packet delay is 5ms but some devices need more */ 2254 ictx->send_packet_delay = ictx->dev_descr->flags & 2255 IMON_NEED_20MS_PKT_DELAY ? 20 : 5; 2256 2257 ret = -ENODEV; 2258 iface_desc = intf->cur_altsetting; 2259 if (!imon_find_endpoints(ictx, iface_desc)) { 2260 goto find_endpoint_failed; 2261 } 2262 2263 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2264 usb_rcvintpipe(ictx->usbdev_intf0, 2265 ictx->rx_endpoint_intf0->bEndpointAddress), 2266 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2267 usb_rx_callback_intf0, ictx, 2268 ictx->rx_endpoint_intf0->bInterval); 2269 2270 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL); 2271 if (ret) { 2272 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret); 2273 goto urb_submit_failed; 2274 } 2275 2276 ictx->idev = imon_init_idev(ictx); 2277 if (!ictx->idev) { 2278 dev_err(dev, "%s: input device setup failed\n", __func__); 2279 goto idev_setup_failed; 2280 } 2281 2282 ictx->rdev = imon_init_rdev(ictx); 2283 if (!ictx->rdev) { 2284 dev_err(dev, "%s: rc device setup failed\n", __func__); 2285 goto rdev_setup_failed; 2286 } 2287 2288 ictx->dev_present_intf0 = true; 2289 2290 mutex_unlock(&ictx->lock); 2291 return ictx; 2292 2293 rdev_setup_failed: 2294 input_unregister_device(ictx->idev); 2295 idev_setup_failed: 2296 usb_kill_urb(ictx->rx_urb_intf0); 2297 urb_submit_failed: 2298 find_endpoint_failed: 2299 usb_put_dev(ictx->usbdev_intf0); 2300 mutex_unlock(&ictx->lock); 2301 usb_free_urb(tx_urb); 2302 tx_urb_alloc_failed: 2303 usb_free_urb(rx_urb); 2304 rx_urb_alloc_failed: 2305 kfree(ictx); 2306 exit: 2307 dev_err(dev, "unable to initialize intf0, err %d\n", ret); 2308 2309 return NULL; 2310 } 2311 2312 static struct imon_context *imon_init_intf1(struct usb_interface *intf, 2313 struct imon_context *ictx) 2314 { 2315 struct urb *rx_urb; 2316 struct usb_host_interface *iface_desc; 2317 int ret = -ENOMEM; 2318 2319 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2320 if (!rx_urb) 2321 goto rx_urb_alloc_failed; 2322 2323 mutex_lock(&ictx->lock); 2324 2325 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2326 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0); 2327 } 2328 2329 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf)); 2330 ictx->rx_urb_intf1 = rx_urb; 2331 2332 ret = -ENODEV; 2333 iface_desc = intf->cur_altsetting; 2334 if (!imon_find_endpoints(ictx, iface_desc)) 2335 goto find_endpoint_failed; 2336 2337 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2338 ictx->touch = imon_init_touch(ictx); 2339 if (!ictx->touch) 2340 goto touch_setup_failed; 2341 } else 2342 ictx->touch = NULL; 2343 2344 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2345 usb_rcvintpipe(ictx->usbdev_intf1, 2346 ictx->rx_endpoint_intf1->bEndpointAddress), 2347 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2348 usb_rx_callback_intf1, ictx, 2349 ictx->rx_endpoint_intf1->bInterval); 2350 2351 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL); 2352 2353 if (ret) { 2354 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret); 2355 goto urb_submit_failed; 2356 } 2357 2358 ictx->dev_present_intf1 = true; 2359 2360 mutex_unlock(&ictx->lock); 2361 return ictx; 2362 2363 urb_submit_failed: 2364 if (ictx->touch) 2365 input_unregister_device(ictx->touch); 2366 touch_setup_failed: 2367 find_endpoint_failed: 2368 usb_put_dev(ictx->usbdev_intf1); 2369 ictx->usbdev_intf1 = NULL; 2370 mutex_unlock(&ictx->lock); 2371 usb_free_urb(rx_urb); 2372 ictx->rx_urb_intf1 = NULL; 2373 rx_urb_alloc_failed: 2374 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret); 2375 2376 return NULL; 2377 } 2378 2379 static void imon_init_display(struct imon_context *ictx, 2380 struct usb_interface *intf) 2381 { 2382 int ret; 2383 2384 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n"); 2385 2386 /* set up sysfs entry for built-in clock */ 2387 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group); 2388 if (ret) 2389 dev_err(ictx->dev, "Could not create display sysfs entries(%d)", 2390 ret); 2391 2392 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2393 ret = usb_register_dev(intf, &imon_lcd_class); 2394 else 2395 ret = usb_register_dev(intf, &imon_vfd_class); 2396 if (ret) 2397 /* Not a fatal error, so ignore */ 2398 dev_info(ictx->dev, "could not get a minor number for display\n"); 2399 2400 } 2401 2402 /* 2403 * Callback function for USB core API: Probe 2404 */ 2405 static int imon_probe(struct usb_interface *interface, 2406 const struct usb_device_id *id) 2407 { 2408 struct usb_device *usbdev = NULL; 2409 struct usb_host_interface *iface_desc = NULL; 2410 struct usb_interface *first_if; 2411 struct device *dev = &interface->dev; 2412 int ifnum, sysfs_err; 2413 int ret = 0; 2414 struct imon_context *ictx = NULL; 2415 u16 vendor, product; 2416 2417 usbdev = usb_get_dev(interface_to_usbdev(interface)); 2418 iface_desc = interface->cur_altsetting; 2419 ifnum = iface_desc->desc.bInterfaceNumber; 2420 vendor = le16_to_cpu(usbdev->descriptor.idVendor); 2421 product = le16_to_cpu(usbdev->descriptor.idProduct); 2422 2423 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n", 2424 __func__, vendor, product, ifnum); 2425 2426 first_if = usb_ifnum_to_if(usbdev, 0); 2427 if (!first_if) { 2428 ret = -ENODEV; 2429 goto fail; 2430 } 2431 2432 if (ifnum == 0) { 2433 ictx = imon_init_intf0(interface, id); 2434 if (!ictx) { 2435 pr_err("failed to initialize context!\n"); 2436 ret = -ENODEV; 2437 goto fail; 2438 } 2439 refcount_set(&ictx->users, 1); 2440 2441 } else { 2442 /* this is the secondary interface on the device */ 2443 struct imon_context *first_if_ctx = usb_get_intfdata(first_if); 2444 2445 /* fail early if first intf failed to register */ 2446 if (!first_if_ctx) { 2447 ret = -ENODEV; 2448 goto fail; 2449 } 2450 2451 ictx = imon_init_intf1(interface, first_if_ctx); 2452 if (!ictx) { 2453 pr_err("failed to attach to context!\n"); 2454 ret = -ENODEV; 2455 goto fail; 2456 } 2457 refcount_inc(&ictx->users); 2458 2459 } 2460 2461 usb_set_intfdata(interface, ictx); 2462 2463 if (ifnum == 0) { 2464 if (product == 0xffdc && ictx->rf_device) { 2465 sysfs_err = sysfs_create_group(&interface->dev.kobj, 2466 &imon_rf_attr_group); 2467 if (sysfs_err) 2468 pr_err("Could not create RF sysfs entries(%d)\n", 2469 sysfs_err); 2470 } 2471 2472 if (ictx->display_supported) 2473 imon_init_display(ictx, interface); 2474 } 2475 2476 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n", 2477 vendor, product, ifnum, 2478 usbdev->bus->busnum, usbdev->devnum); 2479 2480 usb_put_dev(usbdev); 2481 2482 return 0; 2483 2484 fail: 2485 usb_put_dev(usbdev); 2486 dev_err(dev, "unable to register, err %d\n", ret); 2487 2488 return ret; 2489 } 2490 2491 /* 2492 * Callback function for USB core API: disconnect 2493 */ 2494 static void imon_disconnect(struct usb_interface *interface) 2495 { 2496 struct imon_context *ictx; 2497 struct device *dev; 2498 int ifnum; 2499 2500 ictx = usb_get_intfdata(interface); 2501 ictx->disconnected = true; 2502 dev = ictx->dev; 2503 ifnum = interface->cur_altsetting->desc.bInterfaceNumber; 2504 2505 /* 2506 * sysfs_remove_group is safe to call even if sysfs_create_group 2507 * hasn't been called 2508 */ 2509 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group); 2510 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group); 2511 2512 usb_set_intfdata(interface, NULL); 2513 2514 /* Abort ongoing write */ 2515 if (ictx->tx.busy) { 2516 usb_kill_urb(ictx->tx_urb); 2517 complete(&ictx->tx.finished); 2518 } 2519 2520 if (ifnum == 0) { 2521 ictx->dev_present_intf0 = false; 2522 usb_kill_urb(ictx->rx_urb_intf0); 2523 input_unregister_device(ictx->idev); 2524 rc_unregister_device(ictx->rdev); 2525 if (ictx->display_supported) { 2526 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2527 usb_deregister_dev(interface, &imon_lcd_class); 2528 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD) 2529 usb_deregister_dev(interface, &imon_vfd_class); 2530 } 2531 usb_put_dev(ictx->usbdev_intf0); 2532 } else { 2533 ictx->dev_present_intf1 = false; 2534 usb_kill_urb(ictx->rx_urb_intf1); 2535 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2536 del_timer_sync(&ictx->ttimer); 2537 input_unregister_device(ictx->touch); 2538 } 2539 usb_put_dev(ictx->usbdev_intf1); 2540 } 2541 2542 if (refcount_dec_and_test(&ictx->users)) 2543 free_imon_context(ictx); 2544 2545 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n", 2546 __func__, ifnum); 2547 } 2548 2549 static int imon_suspend(struct usb_interface *intf, pm_message_t message) 2550 { 2551 struct imon_context *ictx = usb_get_intfdata(intf); 2552 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2553 2554 if (ifnum == 0) 2555 usb_kill_urb(ictx->rx_urb_intf0); 2556 else 2557 usb_kill_urb(ictx->rx_urb_intf1); 2558 2559 return 0; 2560 } 2561 2562 static int imon_resume(struct usb_interface *intf) 2563 { 2564 int rc = 0; 2565 struct imon_context *ictx = usb_get_intfdata(intf); 2566 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2567 2568 if (ifnum == 0) { 2569 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2570 usb_rcvintpipe(ictx->usbdev_intf0, 2571 ictx->rx_endpoint_intf0->bEndpointAddress), 2572 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2573 usb_rx_callback_intf0, ictx, 2574 ictx->rx_endpoint_intf0->bInterval); 2575 2576 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_NOIO); 2577 2578 } else { 2579 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2580 usb_rcvintpipe(ictx->usbdev_intf1, 2581 ictx->rx_endpoint_intf1->bEndpointAddress), 2582 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2583 usb_rx_callback_intf1, ictx, 2584 ictx->rx_endpoint_intf1->bInterval); 2585 2586 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_NOIO); 2587 } 2588 2589 return rc; 2590 } 2591 2592 module_usb_driver(imon_driver); 2593