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 */ 52static int imon_probe(struct usb_interface *interface, 53 const struct usb_device_id *id); 54static void imon_disconnect(struct usb_interface *interface); 55static void usb_rx_callback_intf0(struct urb *urb); 56static void usb_rx_callback_intf1(struct urb *urb); 57static void usb_tx_callback(struct urb *urb); 58 59/* suspend/resume support */ 60static int imon_resume(struct usb_interface *intf); 61static int imon_suspend(struct usb_interface *intf, pm_message_t message); 62 63/* Display file_operations function prototypes */ 64static int display_open(struct inode *inode, struct file *file); 65static int display_close(struct inode *inode, struct file *file); 66 67/* VFD write operation */ 68static 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 */ 72static 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 77struct imon_panel_key_table { 78 u64 hw_code; 79 u32 keycode; 80}; 81 82struct 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 90struct 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 */ 179static 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 */ 188static 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 196enum { 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 204enum { 205 IMON_KEY_IMON = 0, 206 IMON_KEY_MCE = 1, 207 IMON_KEY_PANEL = 2, 208}; 209 210static struct usb_class_driver imon_vfd_class = { 211 .name = DEVICE_NAME, 212 .fops = &vfd_fops, 213 .minor_base = DISPLAY_MINOR_BASE, 214}; 215 216static 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 */ 223static 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 272static 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*/ 318static 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 */ 339static 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 */ 375static 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 */ 451static 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 */ 461MODULE_AUTHOR(MOD_AUTHOR); 462MODULE_DESCRIPTION(MOD_DESC); 463MODULE_VERSION(MOD_VERSION); 464MODULE_LICENSE("GPL"); 465MODULE_DEVICE_TABLE(usb, imon_usb_id_table); 466 467static bool debug; 468module_param(debug, bool, S_IRUGO | S_IWUSR); 469MODULE_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... */ 472static int display_type; 473module_param(display_type, int, S_IRUGO); 474MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)"); 475 476static int pad_stabilize = 1; 477module_param(pad_stabilize, int, S_IRUGO | S_IWUSR); 478MODULE_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 */ 484static bool nomouse; 485module_param(nomouse, bool, S_IRUGO | S_IWUSR); 486MODULE_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 */ 489static int pad_thresh; 490module_param(pad_thresh, int, S_IRUGO | S_IWUSR); 491MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)"); 492 493 494static 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 */ 512static 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 556exit: 557 return retval; 558} 559 560/* 561 * Called when the display device (e.g. /dev/lcd0) 562 * is closed by the application. 563 */ 564static 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 */ 593static 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 retval = wait_for_completion_interruptible( 650 &ictx->tx.finished); 651 if (retval) { 652 usb_kill_urb(ictx->tx_urb); 653 pr_err_ratelimited("task interrupted\n"); 654 } 655 656 ictx->tx.busy = false; 657 retval = ictx->tx.status; 658 if (retval) 659 pr_err_ratelimited("packet tx failed (%d)\n", retval); 660 } 661 662 kfree(control_req); 663 664 /* 665 * Induce a mandatory delay before returning, as otherwise, 666 * send_packet can get called so rapidly as to overwhelm the device, 667 * particularly on faster systems and/or those with quirky usb. 668 */ 669 timeout = msecs_to_jiffies(ictx->send_packet_delay); 670 set_current_state(TASK_INTERRUPTIBLE); 671 schedule_timeout(timeout); 672 673 return retval; 674} 675 676/* 677 * Sends an associate packet to the iMON 2.4G. 678 * 679 * This might not be such a good idea, since it has an id collision with 680 * some versions of the "IR & VFD" combo. The only way to determine if it 681 * is an RF version is to look at the product description string. (Which 682 * we currently do not fetch). 683 */ 684static int send_associate_24g(struct imon_context *ictx) 685{ 686 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00, 687 0x00, 0x00, 0x00, 0x20 }; 688 689 if (!ictx) { 690 pr_err("no context for device\n"); 691 return -ENODEV; 692 } 693 694 if (!ictx->dev_present_intf0) { 695 pr_err("no iMON device present\n"); 696 return -ENODEV; 697 } 698 699 memcpy(ictx->usb_tx_buf, packet, sizeof(packet)); 700 701 return send_packet(ictx); 702} 703 704/* 705 * Sends packets to setup and show clock on iMON display 706 * 707 * Arguments: year - last 2 digits of year, month - 1..12, 708 * day - 1..31, dow - day of the week (0-Sun...6-Sat), 709 * hour - 0..23, minute - 0..59, second - 0..59 710 */ 711static int send_set_imon_clock(struct imon_context *ictx, 712 unsigned int year, unsigned int month, 713 unsigned int day, unsigned int dow, 714 unsigned int hour, unsigned int minute, 715 unsigned int second) 716{ 717 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8]; 718 int retval = 0; 719 int i; 720 721 if (!ictx) { 722 pr_err("no context for device\n"); 723 return -ENODEV; 724 } 725 726 switch (ictx->display_type) { 727 case IMON_DISPLAY_TYPE_LCD: 728 clock_enable_pkt[0][0] = 0x80; 729 clock_enable_pkt[0][1] = year; 730 clock_enable_pkt[0][2] = month-1; 731 clock_enable_pkt[0][3] = day; 732 clock_enable_pkt[0][4] = hour; 733 clock_enable_pkt[0][5] = minute; 734 clock_enable_pkt[0][6] = second; 735 736 clock_enable_pkt[1][0] = 0x80; 737 clock_enable_pkt[1][1] = 0; 738 clock_enable_pkt[1][2] = 0; 739 clock_enable_pkt[1][3] = 0; 740 clock_enable_pkt[1][4] = 0; 741 clock_enable_pkt[1][5] = 0; 742 clock_enable_pkt[1][6] = 0; 743 744 if (ictx->product == 0xffdc) { 745 clock_enable_pkt[0][7] = 0x50; 746 clock_enable_pkt[1][7] = 0x51; 747 } else { 748 clock_enable_pkt[0][7] = 0x88; 749 clock_enable_pkt[1][7] = 0x8a; 750 } 751 752 break; 753 754 case IMON_DISPLAY_TYPE_VFD: 755 clock_enable_pkt[0][0] = year; 756 clock_enable_pkt[0][1] = month-1; 757 clock_enable_pkt[0][2] = day; 758 clock_enable_pkt[0][3] = dow; 759 clock_enable_pkt[0][4] = hour; 760 clock_enable_pkt[0][5] = minute; 761 clock_enable_pkt[0][6] = second; 762 clock_enable_pkt[0][7] = 0x40; 763 764 clock_enable_pkt[1][0] = 0; 765 clock_enable_pkt[1][1] = 0; 766 clock_enable_pkt[1][2] = 1; 767 clock_enable_pkt[1][3] = 0; 768 clock_enable_pkt[1][4] = 0; 769 clock_enable_pkt[1][5] = 0; 770 clock_enable_pkt[1][6] = 0; 771 clock_enable_pkt[1][7] = 0x42; 772 773 break; 774 775 default: 776 return -ENODEV; 777 } 778 779 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) { 780 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8); 781 retval = send_packet(ictx); 782 if (retval) { 783 pr_err("send_packet failed for packet %d\n", i); 784 break; 785 } 786 } 787 788 return retval; 789} 790 791/* 792 * These are the sysfs functions to handle the association on the iMON 2.4G LT. 793 */ 794static ssize_t associate_remote_show(struct device *d, 795 struct device_attribute *attr, 796 char *buf) 797{ 798 struct imon_context *ictx = dev_get_drvdata(d); 799 800 if (!ictx) 801 return -ENODEV; 802 803 mutex_lock(&ictx->lock); 804 if (ictx->rf_isassociating) 805 strscpy(buf, "associating\n", PAGE_SIZE); 806 else 807 strscpy(buf, "closed\n", PAGE_SIZE); 808 809 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"); 810 mutex_unlock(&ictx->lock); 811 return strlen(buf); 812} 813 814static ssize_t associate_remote_store(struct device *d, 815 struct device_attribute *attr, 816 const char *buf, size_t count) 817{ 818 struct imon_context *ictx; 819 820 ictx = dev_get_drvdata(d); 821 822 if (!ictx) 823 return -ENODEV; 824 825 mutex_lock(&ictx->lock); 826 ictx->rf_isassociating = true; 827 send_associate_24g(ictx); 828 mutex_unlock(&ictx->lock); 829 830 return count; 831} 832 833/* 834 * sysfs functions to control internal imon clock 835 */ 836static ssize_t imon_clock_show(struct device *d, 837 struct device_attribute *attr, char *buf) 838{ 839 struct imon_context *ictx = dev_get_drvdata(d); 840 size_t len; 841 842 if (!ictx) 843 return -ENODEV; 844 845 mutex_lock(&ictx->lock); 846 847 if (!ictx->display_supported) { 848 len = snprintf(buf, PAGE_SIZE, "Not supported."); 849 } else { 850 len = snprintf(buf, PAGE_SIZE, 851 "To set the clock on your iMON display:\n" 852 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n" 853 "%s", ictx->display_isopen ? 854 "\nNOTE: imon device must be closed\n" : ""); 855 } 856 857 mutex_unlock(&ictx->lock); 858 859 return len; 860} 861 862static ssize_t imon_clock_store(struct device *d, 863 struct device_attribute *attr, 864 const char *buf, size_t count) 865{ 866 struct imon_context *ictx = dev_get_drvdata(d); 867 ssize_t retval; 868 unsigned int year, month, day, dow, hour, minute, second; 869 870 if (!ictx) 871 return -ENODEV; 872 873 mutex_lock(&ictx->lock); 874 875 if (!ictx->display_supported) { 876 retval = -ENODEV; 877 goto exit; 878 } else if (ictx->display_isopen) { 879 retval = -EBUSY; 880 goto exit; 881 } 882 883 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow, 884 &hour, &minute, &second) != 7) { 885 retval = -EINVAL; 886 goto exit; 887 } 888 889 if ((month < 1 || month > 12) || 890 (day < 1 || day > 31) || (dow > 6) || 891 (hour > 23) || (minute > 59) || (second > 59)) { 892 retval = -EINVAL; 893 goto exit; 894 } 895 896 retval = send_set_imon_clock(ictx, year, month, day, dow, 897 hour, minute, second); 898 if (retval) 899 goto exit; 900 901 retval = count; 902exit: 903 mutex_unlock(&ictx->lock); 904 905 return retval; 906} 907 908 909static DEVICE_ATTR_RW(imon_clock); 910static DEVICE_ATTR_RW(associate_remote); 911 912static struct attribute *imon_display_sysfs_entries[] = { 913 &dev_attr_imon_clock.attr, 914 NULL 915}; 916 917static const struct attribute_group imon_display_attr_group = { 918 .attrs = imon_display_sysfs_entries 919}; 920 921static struct attribute *imon_rf_sysfs_entries[] = { 922 &dev_attr_associate_remote.attr, 923 NULL 924}; 925 926static const struct attribute_group imon_rf_attr_group = { 927 .attrs = imon_rf_sysfs_entries 928}; 929 930/* 931 * Writes data to the VFD. The iMON VFD is 2x16 characters 932 * and requires data in 5 consecutive USB interrupt packets, 933 * each packet but the last carrying 7 bytes. 934 * 935 * I don't know if the VFD board supports features such as 936 * scrolling, clearing rows, blanking, etc. so at 937 * the caller must provide a full screen of data. If fewer 938 * than 32 bytes are provided spaces will be appended to 939 * generate a full screen. 940 */ 941static ssize_t vfd_write(struct file *file, const char __user *buf, 942 size_t n_bytes, loff_t *pos) 943{ 944 int i; 945 int offset; 946 int seq; 947 int retval = 0; 948 struct imon_context *ictx = file->private_data; 949 static const unsigned char vfd_packet6[] = { 950 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; 951 952 if (ictx->disconnected) 953 return -ENODEV; 954 955 if (mutex_lock_interruptible(&ictx->lock)) 956 return -ERESTARTSYS; 957 958 if (!ictx->dev_present_intf0) { 959 pr_err_ratelimited("no iMON device present\n"); 960 retval = -ENODEV; 961 goto exit; 962 } 963 964 if (n_bytes <= 0 || n_bytes > 32) { 965 pr_err_ratelimited("invalid payload size\n"); 966 retval = -EINVAL; 967 goto exit; 968 } 969 970 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) { 971 retval = -EFAULT; 972 goto exit; 973 } 974 975 /* Pad with spaces */ 976 for (i = n_bytes; i < 32; ++i) 977 ictx->tx.data_buf[i] = ' '; 978 979 for (i = 32; i < 35; ++i) 980 ictx->tx.data_buf[i] = 0xFF; 981 982 offset = 0; 983 seq = 0; 984 985 do { 986 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7); 987 ictx->usb_tx_buf[7] = (unsigned char) seq; 988 989 retval = send_packet(ictx); 990 if (retval) { 991 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 992 goto exit; 993 } else { 994 seq += 2; 995 offset += 7; 996 } 997 998 } while (offset < 35); 999 1000 /* Send packet #6 */ 1001 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); 1002 ictx->usb_tx_buf[7] = (unsigned char) seq; 1003 retval = send_packet(ictx); 1004 if (retval) 1005 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 1006 1007exit: 1008 mutex_unlock(&ictx->lock); 1009 1010 return (!retval) ? n_bytes : retval; 1011} 1012 1013/* 1014 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte 1015 * packets. We accept data as 16 hexadecimal digits, followed by a 1016 * newline (to make it easy to drive the device from a command-line 1017 * -- even though the actual binary data is a bit complicated). 1018 * 1019 * The device itself is not a "traditional" text-mode display. It's 1020 * actually a 16x96 pixel bitmap display. That means if you want to 1021 * display text, you've got to have your own "font" and translate the 1022 * text into bitmaps for display. This is really flexible (you can 1023 * display whatever diacritics you need, and so on), but it's also 1024 * a lot more complicated than most LCDs... 1025 */ 1026static ssize_t lcd_write(struct file *file, const char __user *buf, 1027 size_t n_bytes, loff_t *pos) 1028{ 1029 int retval = 0; 1030 struct imon_context *ictx = file->private_data; 1031 1032 if (ictx->disconnected) 1033 return -ENODEV; 1034 1035 mutex_lock(&ictx->lock); 1036 1037 if (!ictx->display_supported) { 1038 pr_err_ratelimited("no iMON display present\n"); 1039 retval = -ENODEV; 1040 goto exit; 1041 } 1042 1043 if (n_bytes != 8) { 1044 pr_err_ratelimited("invalid payload size: %d (expected 8)\n", 1045 (int)n_bytes); 1046 retval = -EINVAL; 1047 goto exit; 1048 } 1049 1050 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) { 1051 retval = -EFAULT; 1052 goto exit; 1053 } 1054 1055 retval = send_packet(ictx); 1056 if (retval) { 1057 pr_err_ratelimited("send packet failed!\n"); 1058 goto exit; 1059 } else { 1060 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n", 1061 __func__, (int) n_bytes); 1062 } 1063exit: 1064 mutex_unlock(&ictx->lock); 1065 return (!retval) ? n_bytes : retval; 1066} 1067 1068/* 1069 * Callback function for USB core API: transmit data 1070 */ 1071static void usb_tx_callback(struct urb *urb) 1072{ 1073 struct imon_context *ictx; 1074 1075 if (!urb) 1076 return; 1077 ictx = (struct imon_context *)urb->context; 1078 if (!ictx) 1079 return; 1080 1081 ictx->tx.status = urb->status; 1082 1083 /* notify waiters that write has finished */ 1084 ictx->tx.busy = false; 1085 smp_rmb(); /* ensure later readers know we're not busy */ 1086 complete(&ictx->tx.finished); 1087} 1088 1089/* 1090 * report touchscreen input 1091 */ 1092static void imon_touch_display_timeout(struct timer_list *t) 1093{ 1094 struct imon_context *ictx = from_timer(ictx, t, ttimer); 1095 1096 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA) 1097 return; 1098 1099 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1100 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1101 input_report_key(ictx->touch, BTN_TOUCH, 0x00); 1102 input_sync(ictx->touch); 1103} 1104 1105/* 1106 * iMON IR receivers support two different signal sets -- those used by 1107 * the iMON remotes, and those used by the Windows MCE remotes (which is 1108 * really just RC-6), but only one or the other at a time, as the signals 1109 * are decoded onboard the receiver. 1110 * 1111 * This function gets called two different ways, one way is from 1112 * rc_register_device, for initial protocol selection/setup, and the other is 1113 * via a userspace-initiated protocol change request, either by direct sysfs 1114 * prodding or by something like ir-keytable. In the rc_register_device case, 1115 * the imon context lock is already held, but when initiated from userspace, 1116 * it is not, so we must acquire it prior to calling send_packet, which 1117 * requires that the lock is held. 1118 */ 1119static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto) 1120{ 1121 int retval; 1122 struct imon_context *ictx = rc->priv; 1123 struct device *dev = ictx->dev; 1124 bool unlock = false; 1125 unsigned char ir_proto_packet[] = { 1126 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 }; 1127 1128 if (*rc_proto && !(*rc_proto & rc->allowed_protocols)) 1129 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n"); 1130 1131 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) { 1132 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n"); 1133 ir_proto_packet[0] = 0x01; 1134 *rc_proto = RC_PROTO_BIT_RC6_MCE; 1135 } else if (*rc_proto & RC_PROTO_BIT_IMON) { 1136 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n"); 1137 if (!pad_stabilize) 1138 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1139 /* ir_proto_packet[0] = 0x00; // already the default */ 1140 *rc_proto = RC_PROTO_BIT_IMON; 1141 } else { 1142 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n"); 1143 if (!pad_stabilize) 1144 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1145 /* ir_proto_packet[0] = 0x00; // already the default */ 1146 *rc_proto = RC_PROTO_BIT_IMON; 1147 } 1148 1149 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet)); 1150 1151 if (!mutex_is_locked(&ictx->lock)) { 1152 unlock = true; 1153 mutex_lock(&ictx->lock); 1154 } 1155 1156 retval = send_packet(ictx); 1157 if (retval) 1158 goto out; 1159 1160 ictx->rc_proto = *rc_proto; 1161 ictx->pad_mouse = false; 1162 1163out: 1164 if (unlock) 1165 mutex_unlock(&ictx->lock); 1166 1167 return retval; 1168} 1169 1170/* 1171 * The directional pad behaves a bit differently, depending on whether this is 1172 * one of the older ffdc devices or a newer device. Newer devices appear to 1173 * have a higher resolution matrix for more precise mouse movement, but it 1174 * makes things overly sensitive in keyboard mode, so we do some interesting 1175 * contortions to make it less touchy. Older devices run through the same 1176 * routine with shorter timeout and a smaller threshold. 1177 */ 1178static int stabilize(int a, int b, u16 timeout, u16 threshold) 1179{ 1180 ktime_t ct; 1181 static ktime_t prev_time; 1182 static ktime_t hit_time; 1183 static int x, y, prev_result, hits; 1184 int result = 0; 1185 long msec, msec_hit; 1186 1187 ct = ktime_get(); 1188 msec = ktime_ms_delta(ct, prev_time); 1189 msec_hit = ktime_ms_delta(ct, hit_time); 1190 1191 if (msec > 100) { 1192 x = 0; 1193 y = 0; 1194 hits = 0; 1195 } 1196 1197 x += a; 1198 y += b; 1199 1200 prev_time = ct; 1201 1202 if (abs(x) > threshold || abs(y) > threshold) { 1203 if (abs(y) > abs(x)) 1204 result = (y > 0) ? 0x7F : 0x80; 1205 else 1206 result = (x > 0) ? 0x7F00 : 0x8000; 1207 1208 x = 0; 1209 y = 0; 1210 1211 if (result == prev_result) { 1212 hits++; 1213 1214 if (hits > 3) { 1215 switch (result) { 1216 case 0x7F: 1217 y = 17 * threshold / 30; 1218 break; 1219 case 0x80: 1220 y -= 17 * threshold / 30; 1221 break; 1222 case 0x7F00: 1223 x = 17 * threshold / 30; 1224 break; 1225 case 0x8000: 1226 x -= 17 * threshold / 30; 1227 break; 1228 } 1229 } 1230 1231 if (hits == 2 && msec_hit < timeout) { 1232 result = 0; 1233 hits = 1; 1234 } 1235 } else { 1236 prev_result = result; 1237 hits = 1; 1238 hit_time = ct; 1239 } 1240 } 1241 1242 return result; 1243} 1244 1245static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode) 1246{ 1247 u32 keycode; 1248 u32 release; 1249 bool is_release_code = false; 1250 1251 /* Look for the initial press of a button */ 1252 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1253 ictx->rc_toggle = 0x0; 1254 ictx->rc_scancode = scancode; 1255 1256 /* Look for the release of a button */ 1257 if (keycode == KEY_RESERVED) { 1258 release = scancode & ~0x4000; 1259 keycode = rc_g_keycode_from_table(ictx->rdev, release); 1260 if (keycode != KEY_RESERVED) 1261 is_release_code = true; 1262 } 1263 1264 ictx->release_code = is_release_code; 1265 1266 return keycode; 1267} 1268 1269static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode) 1270{ 1271 u32 keycode; 1272 1273#define MCE_KEY_MASK 0x7000 1274#define MCE_TOGGLE_BIT 0x8000 1275 1276 /* 1277 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx 1278 * (the toggle bit flipping between alternating key presses), while 1279 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep 1280 * the table trim, we always or in the bits to look up 0x8000ff4xx, 1281 * but we can't or them into all codes, as some keys are decoded in 1282 * a different way w/o the same use of the toggle bit... 1283 */ 1284 if (scancode & 0x80000000) 1285 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT; 1286 1287 ictx->rc_scancode = scancode; 1288 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1289 1290 /* not used in mce mode, but make sure we know its false */ 1291 ictx->release_code = false; 1292 1293 return keycode; 1294} 1295 1296static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code) 1297{ 1298 const struct imon_panel_key_table *key_table; 1299 u32 keycode = KEY_RESERVED; 1300 int i; 1301 1302 key_table = ictx->dev_descr->key_table; 1303 1304 for (i = 0; key_table[i].hw_code != 0; i++) { 1305 if (key_table[i].hw_code == (code | 0xffee)) { 1306 keycode = key_table[i].keycode; 1307 break; 1308 } 1309 } 1310 ictx->release_code = false; 1311 return keycode; 1312} 1313 1314static bool imon_mouse_event(struct imon_context *ictx, 1315 unsigned char *buf, int len) 1316{ 1317 signed char rel_x = 0x00, rel_y = 0x00; 1318 u8 right_shift = 1; 1319 bool mouse_input = true; 1320 int dir = 0; 1321 unsigned long flags; 1322 1323 spin_lock_irqsave(&ictx->kc_lock, flags); 1324 1325 /* newer iMON device PAD or mouse button */ 1326 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) { 1327 rel_x = buf[2]; 1328 rel_y = buf[3]; 1329 right_shift = 1; 1330 /* 0xffdc iMON PAD or mouse button input */ 1331 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) && 1332 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) { 1333 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1334 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1335 if (buf[0] & 0x02) 1336 rel_x |= ~0x0f; 1337 rel_x = rel_x + rel_x / 2; 1338 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1339 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1340 if (buf[0] & 0x01) 1341 rel_y |= ~0x0f; 1342 rel_y = rel_y + rel_y / 2; 1343 right_shift = 2; 1344 /* some ffdc devices decode mouse buttons differently... */ 1345 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) { 1346 right_shift = 2; 1347 /* ch+/- buttons, which we use for an emulated scroll wheel */ 1348 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) { 1349 dir = 1; 1350 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) { 1351 dir = -1; 1352 } else 1353 mouse_input = false; 1354 1355 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1356 1357 if (mouse_input) { 1358 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n"); 1359 1360 if (dir) { 1361 input_report_rel(ictx->idev, REL_WHEEL, dir); 1362 } else if (rel_x || rel_y) { 1363 input_report_rel(ictx->idev, REL_X, rel_x); 1364 input_report_rel(ictx->idev, REL_Y, rel_y); 1365 } else { 1366 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1); 1367 input_report_key(ictx->idev, BTN_RIGHT, 1368 buf[1] >> right_shift & 0x1); 1369 } 1370 input_sync(ictx->idev); 1371 spin_lock_irqsave(&ictx->kc_lock, flags); 1372 ictx->last_keycode = ictx->kc; 1373 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1374 } 1375 1376 return mouse_input; 1377} 1378 1379static void imon_touch_event(struct imon_context *ictx, unsigned char *buf) 1380{ 1381 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT); 1382 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4); 1383 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf)); 1384 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1385 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1386 input_report_key(ictx->touch, BTN_TOUCH, 0x01); 1387 input_sync(ictx->touch); 1388} 1389 1390static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf) 1391{ 1392 int dir = 0; 1393 signed char rel_x = 0x00, rel_y = 0x00; 1394 u16 timeout, threshold; 1395 u32 scancode = KEY_RESERVED; 1396 unsigned long flags; 1397 1398 /* 1399 * The imon directional pad functions more like a touchpad. Bytes 3 & 4 1400 * contain a position coordinate (x,y), with each component ranging 1401 * from -14 to 14. We want to down-sample this to only 4 discrete values 1402 * for up/down/left/right arrow keys. Also, when you get too close to 1403 * diagonals, it has a tendency to jump back and forth, so lets try to 1404 * ignore when they get too close. 1405 */ 1406 if (ictx->product != 0xffdc) { 1407 /* first, pad to 8 bytes so it conforms with everything else */ 1408 buf[5] = buf[6] = buf[7] = 0; 1409 timeout = 500; /* in msecs */ 1410 /* (2*threshold) x (2*threshold) square */ 1411 threshold = pad_thresh ? pad_thresh : 28; 1412 rel_x = buf[2]; 1413 rel_y = buf[3]; 1414 1415 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1416 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) { 1417 dir = stabilize((int)rel_x, (int)rel_y, 1418 timeout, threshold); 1419 if (!dir) { 1420 spin_lock_irqsave(&ictx->kc_lock, 1421 flags); 1422 ictx->kc = KEY_UNKNOWN; 1423 spin_unlock_irqrestore(&ictx->kc_lock, 1424 flags); 1425 return; 1426 } 1427 buf[2] = dir & 0xFF; 1428 buf[3] = (dir >> 8) & 0xFF; 1429 scancode = be32_to_cpu(*((__be32 *)buf)); 1430 } 1431 } else { 1432 /* 1433 * Hack alert: instead of using keycodes, we have 1434 * to use hard-coded scancodes here... 1435 */ 1436 if (abs(rel_y) > abs(rel_x)) { 1437 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1438 buf[3] = 0; 1439 if (rel_y > 0) 1440 scancode = 0x01007f00; /* KEY_DOWN */ 1441 else 1442 scancode = 0x01008000; /* KEY_UP */ 1443 } else { 1444 buf[2] = 0; 1445 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1446 if (rel_x > 0) 1447 scancode = 0x0100007f; /* KEY_RIGHT */ 1448 else 1449 scancode = 0x01000080; /* KEY_LEFT */ 1450 } 1451 } 1452 1453 /* 1454 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad 1455 * device (15c2:ffdc). The remote generates various codes from 1456 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates 1457 * 0x688301b7 and the right one 0x688481b7. All other keys generate 1458 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with 1459 * reversed endianness. Extract direction from buffer, rotate endianness, 1460 * adjust sign and feed the values into stabilize(). The resulting codes 1461 * will be 0x01008000, 0x01007F00, which match the newer devices. 1462 */ 1463 } else { 1464 timeout = 10; /* in msecs */ 1465 /* (2*threshold) x (2*threshold) square */ 1466 threshold = pad_thresh ? pad_thresh : 15; 1467 1468 /* buf[1] is x */ 1469 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1470 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1471 if (buf[0] & 0x02) 1472 rel_x |= ~0x10+1; 1473 /* buf[2] is y */ 1474 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1475 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1476 if (buf[0] & 0x01) 1477 rel_y |= ~0x10+1; 1478 1479 buf[0] = 0x01; 1480 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0; 1481 1482 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1483 dir = stabilize((int)rel_x, (int)rel_y, 1484 timeout, threshold); 1485 if (!dir) { 1486 spin_lock_irqsave(&ictx->kc_lock, flags); 1487 ictx->kc = KEY_UNKNOWN; 1488 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1489 return; 1490 } 1491 buf[2] = dir & 0xFF; 1492 buf[3] = (dir >> 8) & 0xFF; 1493 scancode = be32_to_cpu(*((__be32 *)buf)); 1494 } else { 1495 /* 1496 * Hack alert: instead of using keycodes, we have 1497 * to use hard-coded scancodes here... 1498 */ 1499 if (abs(rel_y) > abs(rel_x)) { 1500 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1501 buf[3] = 0; 1502 if (rel_y > 0) 1503 scancode = 0x01007f00; /* KEY_DOWN */ 1504 else 1505 scancode = 0x01008000; /* KEY_UP */ 1506 } else { 1507 buf[2] = 0; 1508 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1509 if (rel_x > 0) 1510 scancode = 0x0100007f; /* KEY_RIGHT */ 1511 else 1512 scancode = 0x01000080; /* KEY_LEFT */ 1513 } 1514 } 1515 } 1516 1517 if (scancode) { 1518 spin_lock_irqsave(&ictx->kc_lock, flags); 1519 ictx->kc = imon_remote_key_lookup(ictx, scancode); 1520 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1521 } 1522} 1523 1524/* 1525 * figure out if these is a press or a release. We don't actually 1526 * care about repeats, as those will be auto-generated within the IR 1527 * subsystem for repeating scancodes. 1528 */ 1529static int imon_parse_press_type(struct imon_context *ictx, 1530 unsigned char *buf, u8 ktype) 1531{ 1532 int press_type = 0; 1533 unsigned long flags; 1534 1535 spin_lock_irqsave(&ictx->kc_lock, flags); 1536 1537 /* key release of 0x02XXXXXX key */ 1538 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00) 1539 ictx->kc = ictx->last_keycode; 1540 1541 /* mouse button release on (some) 0xffdc devices */ 1542 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 && 1543 buf[2] == 0x81 && buf[3] == 0xb7) 1544 ictx->kc = ictx->last_keycode; 1545 1546 /* mouse button release on (some other) 0xffdc devices */ 1547 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 && 1548 buf[2] == 0x81 && buf[3] == 0xb7) 1549 ictx->kc = ictx->last_keycode; 1550 1551 /* mce-specific button handling, no keyup events */ 1552 else if (ktype == IMON_KEY_MCE) { 1553 ictx->rc_toggle = buf[2]; 1554 press_type = 1; 1555 1556 /* incoherent or irrelevant data */ 1557 } else if (ictx->kc == KEY_RESERVED) 1558 press_type = -EINVAL; 1559 1560 /* key release of 0xXXXXXXb7 key */ 1561 else if (ictx->release_code) 1562 press_type = 0; 1563 1564 /* this is a button press */ 1565 else 1566 press_type = 1; 1567 1568 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1569 1570 return press_type; 1571} 1572 1573/* 1574 * Process the incoming packet 1575 */ 1576static void imon_incoming_packet(struct imon_context *ictx, 1577 struct urb *urb, int intf) 1578{ 1579 int len = urb->actual_length; 1580 unsigned char *buf = urb->transfer_buffer; 1581 struct device *dev = ictx->dev; 1582 unsigned long flags; 1583 u32 kc; 1584 u64 scancode; 1585 int press_type = 0; 1586 ktime_t t; 1587 static ktime_t prev_time; 1588 u8 ktype; 1589 1590 /* filter out junk data on the older 0xffdc imon devices */ 1591 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff)) 1592 return; 1593 1594 /* Figure out what key was pressed */ 1595 if (len == 8 && buf[7] == 0xee) { 1596 scancode = be64_to_cpu(*((__be64 *)buf)); 1597 ktype = IMON_KEY_PANEL; 1598 kc = imon_panel_key_lookup(ictx, scancode); 1599 ictx->release_code = false; 1600 } else { 1601 scancode = be32_to_cpu(*((__be32 *)buf)); 1602 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) { 1603 ktype = IMON_KEY_IMON; 1604 if (buf[0] == 0x80) 1605 ktype = IMON_KEY_MCE; 1606 kc = imon_mce_key_lookup(ictx, scancode); 1607 } else { 1608 ktype = IMON_KEY_IMON; 1609 kc = imon_remote_key_lookup(ictx, scancode); 1610 } 1611 } 1612 1613 spin_lock_irqsave(&ictx->kc_lock, flags); 1614 /* keyboard/mouse mode toggle button */ 1615 if (kc == KEY_KEYBOARD && !ictx->release_code) { 1616 ictx->last_keycode = kc; 1617 if (!nomouse) { 1618 ictx->pad_mouse = !ictx->pad_mouse; 1619 dev_dbg(dev, "toggling to %s mode\n", 1620 ictx->pad_mouse ? "mouse" : "keyboard"); 1621 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1622 return; 1623 } else { 1624 ictx->pad_mouse = false; 1625 dev_dbg(dev, "mouse mode disabled, passing key value\n"); 1626 } 1627 } 1628 1629 ictx->kc = kc; 1630 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1631 1632 /* send touchscreen events through input subsystem if touchpad data */ 1633 if (ictx->touch && len == 8 && buf[7] == 0x86) { 1634 imon_touch_event(ictx, buf); 1635 return; 1636 1637 /* look for mouse events with pad in mouse mode */ 1638 } else if (ictx->pad_mouse) { 1639 if (imon_mouse_event(ictx, buf, len)) 1640 return; 1641 } 1642 1643 /* Now for some special handling to convert pad input to arrow keys */ 1644 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) || 1645 ((len == 8) && (buf[0] & 0x40) && 1646 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) { 1647 len = 8; 1648 imon_pad_to_keys(ictx, buf); 1649 } 1650 1651 if (debug) { 1652 printk(KERN_INFO "intf%d decoded packet: %*ph\n", 1653 intf, len, buf); 1654 } 1655 1656 press_type = imon_parse_press_type(ictx, buf, ktype); 1657 if (press_type < 0) 1658 goto not_input_data; 1659 1660 if (ktype != IMON_KEY_PANEL) { 1661 if (press_type == 0) 1662 rc_keyup(ictx->rdev); 1663 else { 1664 enum rc_proto proto; 1665 1666 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 1667 proto = RC_PROTO_RC6_MCE; 1668 else if (ictx->rc_proto == RC_PROTO_BIT_IMON) 1669 proto = RC_PROTO_IMON; 1670 else 1671 return; 1672 1673 rc_keydown(ictx->rdev, proto, ictx->rc_scancode, 1674 ictx->rc_toggle); 1675 1676 spin_lock_irqsave(&ictx->kc_lock, flags); 1677 ictx->last_keycode = ictx->kc; 1678 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1679 } 1680 return; 1681 } 1682 1683 /* Only panel type events left to process now */ 1684 spin_lock_irqsave(&ictx->kc_lock, flags); 1685 1686 t = ktime_get(); 1687 /* KEY repeats from knob and panel that need to be suppressed */ 1688 if (ictx->kc == KEY_MUTE || 1689 ictx->dev_descr->flags & IMON_SUPPRESS_REPEATED_KEYS) { 1690 if (ictx->kc == ictx->last_keycode && 1691 ktime_ms_delta(t, prev_time) < ictx->idev->rep[REP_DELAY]) { 1692 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1693 return; 1694 } 1695 } 1696 1697 prev_time = t; 1698 kc = ictx->kc; 1699 1700 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1701 1702 input_report_key(ictx->idev, kc, press_type); 1703 input_sync(ictx->idev); 1704 1705 /* panel keys don't generate a release */ 1706 input_report_key(ictx->idev, kc, 0); 1707 input_sync(ictx->idev); 1708 1709 spin_lock_irqsave(&ictx->kc_lock, flags); 1710 ictx->last_keycode = kc; 1711 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1712 1713 return; 1714 1715not_input_data: 1716 if (len != 8) { 1717 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n", 1718 __func__, len, intf); 1719 return; 1720 } 1721 1722 /* iMON 2.4G associate frame */ 1723 if (buf[0] == 0x00 && 1724 buf[2] == 0xFF && /* REFID */ 1725 buf[3] == 0xFF && 1726 buf[4] == 0xFF && 1727 buf[5] == 0xFF && /* iMON 2.4G */ 1728 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */ 1729 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */ 1730 dev_warn(dev, "%s: remote associated refid=%02X\n", 1731 __func__, buf[1]); 1732 ictx->rf_isassociating = false; 1733 } 1734} 1735 1736/* 1737 * Callback function for USB core API: receive data 1738 */ 1739static void usb_rx_callback_intf0(struct urb *urb) 1740{ 1741 struct imon_context *ictx; 1742 int intfnum = 0; 1743 1744 if (!urb) 1745 return; 1746 1747 ictx = (struct imon_context *)urb->context; 1748 if (!ictx) 1749 return; 1750 1751 /* 1752 * if we get a callback before we're done configuring the hardware, we 1753 * can't yet process the data, as there's nowhere to send it, but we 1754 * still need to submit a new rx URB to avoid wedging the hardware 1755 */ 1756 if (!ictx->dev_present_intf0) 1757 goto out; 1758 1759 switch (urb->status) { 1760 case -ENOENT: /* usbcore unlink successful! */ 1761 return; 1762 1763 case -ESHUTDOWN: /* transport endpoint was shut down */ 1764 break; 1765 1766 case 0: 1767 imon_incoming_packet(ictx, urb, intfnum); 1768 break; 1769 1770 default: 1771 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1772 __func__, urb->status); 1773 break; 1774 } 1775 1776out: 1777 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 1778} 1779 1780static void usb_rx_callback_intf1(struct urb *urb) 1781{ 1782 struct imon_context *ictx; 1783 int intfnum = 1; 1784 1785 if (!urb) 1786 return; 1787 1788 ictx = (struct imon_context *)urb->context; 1789 if (!ictx) 1790 return; 1791 1792 /* 1793 * if we get a callback before we're done configuring the hardware, we 1794 * can't yet process the data, as there's nowhere to send it, but we 1795 * still need to submit a new rx URB to avoid wedging the hardware 1796 */ 1797 if (!ictx->dev_present_intf1) 1798 goto out; 1799 1800 switch (urb->status) { 1801 case -ENOENT: /* usbcore unlink successful! */ 1802 return; 1803 1804 case -ESHUTDOWN: /* transport endpoint was shut down */ 1805 break; 1806 1807 case 0: 1808 imon_incoming_packet(ictx, urb, intfnum); 1809 break; 1810 1811 default: 1812 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1813 __func__, urb->status); 1814 break; 1815 } 1816 1817out: 1818 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 1819} 1820 1821/* 1822 * The 0x15c2:0xffdc device ID was used for umpteen different imon 1823 * devices, and all of them constantly spew interrupts, even when there 1824 * is no actual data to report. However, byte 6 of this buffer looks like 1825 * its unique across device variants, so we're trying to key off that to 1826 * figure out which display type (if any) and what IR protocol the device 1827 * actually supports. These devices have their IR protocol hard-coded into 1828 * their firmware, they can't be changed on the fly like the newer hardware. 1829 */ 1830static void imon_get_ffdc_type(struct imon_context *ictx) 1831{ 1832 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6]; 1833 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE; 1834 u64 allowed_protos = RC_PROTO_BIT_IMON; 1835 1836 switch (ffdc_cfg_byte) { 1837 /* iMON Knob, no display, iMON IR + vol knob */ 1838 case 0x21: 1839 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR"); 1840 ictx->display_supported = false; 1841 break; 1842 /* iMON 2.4G LT (usb stick), no display, iMON RF */ 1843 case 0x4e: 1844 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF"); 1845 ictx->display_supported = false; 1846 ictx->rf_device = true; 1847 break; 1848 /* iMON VFD, no IR (does have vol knob tho) */ 1849 case 0x35: 1850 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR"); 1851 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1852 break; 1853 /* iMON VFD, iMON IR */ 1854 case 0x24: 1855 case 0x30: 1856 case 0x85: 1857 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR"); 1858 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1859 break; 1860 /* iMON VFD, MCE IR */ 1861 case 0x46: 1862 case 0x9e: 1863 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR"); 1864 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1865 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1866 break; 1867 /* iMON VFD, iMON or MCE IR */ 1868 case 0x7e: 1869 dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR"); 1870 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1871 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1872 break; 1873 /* iMON LCD, MCE IR */ 1874 case 0x9f: 1875 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR"); 1876 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1877 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1878 break; 1879 /* no display, iMON IR */ 1880 case 0x26: 1881 dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR"); 1882 ictx->display_supported = false; 1883 break; 1884 /* Soundgraph iMON UltraBay */ 1885 case 0x98: 1886 dev_info(ictx->dev, "0xffdc iMON UltraBay, LCD + IR"); 1887 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1888 allowed_protos = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 1889 ictx->dev_descr = &ultrabay_table; 1890 break; 1891 1892 default: 1893 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR"); 1894 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1895 /* 1896 * We don't know which one it is, allow user to set the 1897 * RC6 one from userspace if IMON wasn't correct. 1898 */ 1899 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1900 break; 1901 } 1902 1903 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte); 1904 1905 ictx->display_type = detected_display_type; 1906 ictx->rc_proto = allowed_protos; 1907} 1908 1909static void imon_set_display_type(struct imon_context *ictx) 1910{ 1911 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1912 1913 /* 1914 * Try to auto-detect the type of display if the user hasn't set 1915 * it by hand via the display_type modparam. Default is VFD. 1916 */ 1917 1918 if (display_type == IMON_DISPLAY_TYPE_AUTO) { 1919 switch (ictx->product) { 1920 case 0xffdc: 1921 /* set in imon_get_ffdc_type() */ 1922 configured_display_type = ictx->display_type; 1923 break; 1924 case 0x0034: 1925 case 0x0035: 1926 configured_display_type = IMON_DISPLAY_TYPE_VGA; 1927 break; 1928 case 0x0038: 1929 case 0x0039: 1930 case 0x0045: 1931 configured_display_type = IMON_DISPLAY_TYPE_LCD; 1932 break; 1933 case 0x003c: 1934 case 0x0041: 1935 case 0x0042: 1936 case 0x0043: 1937 configured_display_type = IMON_DISPLAY_TYPE_NONE; 1938 ictx->display_supported = false; 1939 break; 1940 case 0x0036: 1941 case 0x0044: 1942 default: 1943 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1944 break; 1945 } 1946 } else { 1947 configured_display_type = display_type; 1948 if (display_type == IMON_DISPLAY_TYPE_NONE) 1949 ictx->display_supported = false; 1950 else 1951 ictx->display_supported = true; 1952 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n", 1953 __func__, display_type); 1954 } 1955 1956 ictx->display_type = configured_display_type; 1957} 1958 1959static struct rc_dev *imon_init_rdev(struct imon_context *ictx) 1960{ 1961 struct rc_dev *rdev; 1962 int ret; 1963 static const unsigned char fp_packet[] = { 1964 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 }; 1965 1966 rdev = rc_allocate_device(RC_DRIVER_SCANCODE); 1967 if (!rdev) { 1968 dev_err(ictx->dev, "remote control dev allocation failed\n"); 1969 goto out; 1970 } 1971 1972 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev), 1973 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product); 1974 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev, 1975 sizeof(ictx->phys_rdev)); 1976 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev)); 1977 1978 rdev->device_name = ictx->name_rdev; 1979 rdev->input_phys = ictx->phys_rdev; 1980 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id); 1981 rdev->dev.parent = ictx->dev; 1982 1983 rdev->priv = ictx; 1984 /* iMON PAD or MCE */ 1985 rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 1986 rdev->change_protocol = imon_ir_change_protocol; 1987 rdev->driver_name = MOD_NAME; 1988 1989 /* Enable front-panel buttons and/or knobs */ 1990 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet)); 1991 ret = send_packet(ictx); 1992 /* Not fatal, but warn about it */ 1993 if (ret) 1994 dev_info(ictx->dev, "panel buttons/knobs setup failed\n"); 1995 1996 if (ictx->product == 0xffdc) { 1997 imon_get_ffdc_type(ictx); 1998 rdev->allowed_protocols = ictx->rc_proto; 1999 } 2000 2001 imon_set_display_type(ictx); 2002 2003 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 2004 rdev->map_name = RC_MAP_IMON_MCE; 2005 else 2006 rdev->map_name = RC_MAP_IMON_PAD; 2007 2008 ret = rc_register_device(rdev); 2009 if (ret < 0) { 2010 dev_err(ictx->dev, "remote input dev register failed\n"); 2011 goto out; 2012 } 2013 2014 return rdev; 2015 2016out: 2017 rc_free_device(rdev); 2018 return NULL; 2019} 2020 2021static struct input_dev *imon_init_idev(struct imon_context *ictx) 2022{ 2023 const struct imon_panel_key_table *key_table; 2024 struct input_dev *idev; 2025 int ret, i; 2026 2027 key_table = ictx->dev_descr->key_table; 2028 2029 idev = input_allocate_device(); 2030 if (!idev) 2031 goto out; 2032 2033 snprintf(ictx->name_idev, sizeof(ictx->name_idev), 2034 "iMON Panel, Knob and Mouse(%04x:%04x)", 2035 ictx->vendor, ictx->product); 2036 idev->name = ictx->name_idev; 2037 2038 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev, 2039 sizeof(ictx->phys_idev)); 2040 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev)); 2041 idev->phys = ictx->phys_idev; 2042 2043 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL); 2044 2045 idev->keybit[BIT_WORD(BTN_MOUSE)] = 2046 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2047 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | 2048 BIT_MASK(REL_WHEEL); 2049 2050 /* panel and/or knob code support */ 2051 for (i = 0; key_table[i].hw_code != 0; i++) { 2052 u32 kc = key_table[i].keycode; 2053 __set_bit(kc, idev->keybit); 2054 } 2055 2056 usb_to_input_id(ictx->usbdev_intf0, &idev->id); 2057 idev->dev.parent = ictx->dev; 2058 input_set_drvdata(idev, ictx); 2059 2060 ret = input_register_device(idev); 2061 if (ret < 0) { 2062 dev_err(ictx->dev, "input dev register failed\n"); 2063 goto out; 2064 } 2065 2066 return idev; 2067 2068out: 2069 input_free_device(idev); 2070 return NULL; 2071} 2072 2073static struct input_dev *imon_init_touch(struct imon_context *ictx) 2074{ 2075 struct input_dev *touch; 2076 int ret; 2077 2078 touch = input_allocate_device(); 2079 if (!touch) 2080 goto touch_alloc_failed; 2081 2082 snprintf(ictx->name_touch, sizeof(ictx->name_touch), 2083 "iMON USB Touchscreen (%04x:%04x)", 2084 ictx->vendor, ictx->product); 2085 touch->name = ictx->name_touch; 2086 2087 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch, 2088 sizeof(ictx->phys_touch)); 2089 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch)); 2090 touch->phys = ictx->phys_touch; 2091 2092 touch->evbit[0] = 2093 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 2094 touch->keybit[BIT_WORD(BTN_TOUCH)] = 2095 BIT_MASK(BTN_TOUCH); 2096 input_set_abs_params(touch, ABS_X, 2097 0x00, 0xfff, 0, 0); 2098 input_set_abs_params(touch, ABS_Y, 2099 0x00, 0xfff, 0, 0); 2100 2101 input_set_drvdata(touch, ictx); 2102 2103 usb_to_input_id(ictx->usbdev_intf1, &touch->id); 2104 touch->dev.parent = ictx->dev; 2105 ret = input_register_device(touch); 2106 if (ret < 0) { 2107 dev_info(ictx->dev, "touchscreen input dev register failed\n"); 2108 goto touch_register_failed; 2109 } 2110 2111 return touch; 2112 2113touch_register_failed: 2114 input_free_device(touch); 2115 2116touch_alloc_failed: 2117 return NULL; 2118} 2119 2120static bool imon_find_endpoints(struct imon_context *ictx, 2121 struct usb_host_interface *iface_desc) 2122{ 2123 struct usb_endpoint_descriptor *ep; 2124 struct usb_endpoint_descriptor *rx_endpoint = NULL; 2125 struct usb_endpoint_descriptor *tx_endpoint = NULL; 2126 int ifnum = iface_desc->desc.bInterfaceNumber; 2127 int num_endpts = iface_desc->desc.bNumEndpoints; 2128 int i, ep_dir, ep_type; 2129 bool ir_ep_found = false; 2130 bool display_ep_found = false; 2131 bool tx_control = false; 2132 2133 /* 2134 * Scan the endpoint list and set: 2135 * first input endpoint = IR endpoint 2136 * first output endpoint = display endpoint 2137 */ 2138 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) { 2139 ep = &iface_desc->endpoint[i].desc; 2140 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; 2141 ep_type = usb_endpoint_type(ep); 2142 2143 if (!ir_ep_found && ep_dir == USB_DIR_IN && 2144 ep_type == USB_ENDPOINT_XFER_INT) { 2145 2146 rx_endpoint = ep; 2147 ir_ep_found = true; 2148 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__); 2149 2150 } else if (!display_ep_found && ep_dir == USB_DIR_OUT && 2151 ep_type == USB_ENDPOINT_XFER_INT) { 2152 tx_endpoint = ep; 2153 display_ep_found = true; 2154 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__); 2155 } 2156 } 2157 2158 if (ifnum == 0) { 2159 ictx->rx_endpoint_intf0 = rx_endpoint; 2160 /* 2161 * tx is used to send characters to lcd/vfd, associate RF 2162 * remotes, set IR protocol, and maybe more... 2163 */ 2164 ictx->tx_endpoint = tx_endpoint; 2165 } else { 2166 ictx->rx_endpoint_intf1 = rx_endpoint; 2167 } 2168 2169 /* 2170 * If we didn't find a display endpoint, this is probably one of the 2171 * newer iMON devices that use control urb instead of interrupt 2172 */ 2173 if (!display_ep_found) { 2174 tx_control = true; 2175 display_ep_found = true; 2176 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n", 2177 __func__); 2178 } 2179 2180 /* 2181 * Some iMON receivers have no display. Unfortunately, it seems 2182 * that SoundGraph recycles device IDs between devices both with 2183 * and without... :\ 2184 */ 2185 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) { 2186 display_ep_found = false; 2187 dev_dbg(ictx->dev, "%s: device has no display\n", __func__); 2188 } 2189 2190 /* 2191 * iMON Touch devices have a VGA touchscreen, but no "display", as 2192 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD). 2193 */ 2194 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2195 display_ep_found = false; 2196 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__); 2197 } 2198 2199 /* Input endpoint is mandatory */ 2200 if (!ir_ep_found) 2201 pr_err("no valid input (IR) endpoint found\n"); 2202 2203 ictx->tx_control = tx_control; 2204 2205 if (display_ep_found) 2206 ictx->display_supported = true; 2207 2208 return ir_ep_found; 2209 2210} 2211 2212static struct imon_context *imon_init_intf0(struct usb_interface *intf, 2213 const struct usb_device_id *id) 2214{ 2215 struct imon_context *ictx; 2216 struct urb *rx_urb; 2217 struct urb *tx_urb; 2218 struct device *dev = &intf->dev; 2219 struct usb_host_interface *iface_desc; 2220 int ret = -ENOMEM; 2221 2222 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL); 2223 if (!ictx) 2224 goto exit; 2225 2226 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2227 if (!rx_urb) 2228 goto rx_urb_alloc_failed; 2229 tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2230 if (!tx_urb) 2231 goto tx_urb_alloc_failed; 2232 2233 mutex_init(&ictx->lock); 2234 spin_lock_init(&ictx->kc_lock); 2235 2236 mutex_lock(&ictx->lock); 2237 2238 ictx->dev = dev; 2239 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf)); 2240 ictx->rx_urb_intf0 = rx_urb; 2241 ictx->tx_urb = tx_urb; 2242 ictx->rf_device = false; 2243 2244 init_completion(&ictx->tx.finished); 2245 2246 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor); 2247 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct); 2248 2249 /* save drive info for later accessing the panel/knob key table */ 2250 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info; 2251 /* default send_packet delay is 5ms but some devices need more */ 2252 ictx->send_packet_delay = ictx->dev_descr->flags & 2253 IMON_NEED_20MS_PKT_DELAY ? 20 : 5; 2254 2255 ret = -ENODEV; 2256 iface_desc = intf->cur_altsetting; 2257 if (!imon_find_endpoints(ictx, iface_desc)) { 2258 goto find_endpoint_failed; 2259 } 2260 2261 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2262 usb_rcvintpipe(ictx->usbdev_intf0, 2263 ictx->rx_endpoint_intf0->bEndpointAddress), 2264 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2265 usb_rx_callback_intf0, ictx, 2266 ictx->rx_endpoint_intf0->bInterval); 2267 2268 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL); 2269 if (ret) { 2270 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret); 2271 goto urb_submit_failed; 2272 } 2273 2274 ictx->idev = imon_init_idev(ictx); 2275 if (!ictx->idev) { 2276 dev_err(dev, "%s: input device setup failed\n", __func__); 2277 goto idev_setup_failed; 2278 } 2279 2280 ictx->rdev = imon_init_rdev(ictx); 2281 if (!ictx->rdev) { 2282 dev_err(dev, "%s: rc device setup failed\n", __func__); 2283 goto rdev_setup_failed; 2284 } 2285 2286 ictx->dev_present_intf0 = true; 2287 2288 mutex_unlock(&ictx->lock); 2289 return ictx; 2290 2291rdev_setup_failed: 2292 input_unregister_device(ictx->idev); 2293idev_setup_failed: 2294 usb_kill_urb(ictx->rx_urb_intf0); 2295urb_submit_failed: 2296find_endpoint_failed: 2297 usb_put_dev(ictx->usbdev_intf0); 2298 mutex_unlock(&ictx->lock); 2299 usb_free_urb(tx_urb); 2300tx_urb_alloc_failed: 2301 usb_free_urb(rx_urb); 2302rx_urb_alloc_failed: 2303 kfree(ictx); 2304exit: 2305 dev_err(dev, "unable to initialize intf0, err %d\n", ret); 2306 2307 return NULL; 2308} 2309 2310static struct imon_context *imon_init_intf1(struct usb_interface *intf, 2311 struct imon_context *ictx) 2312{ 2313 struct urb *rx_urb; 2314 struct usb_host_interface *iface_desc; 2315 int ret = -ENOMEM; 2316 2317 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2318 if (!rx_urb) 2319 goto rx_urb_alloc_failed; 2320 2321 mutex_lock(&ictx->lock); 2322 2323 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2324 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0); 2325 } 2326 2327 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf)); 2328 ictx->rx_urb_intf1 = rx_urb; 2329 2330 ret = -ENODEV; 2331 iface_desc = intf->cur_altsetting; 2332 if (!imon_find_endpoints(ictx, iface_desc)) 2333 goto find_endpoint_failed; 2334 2335 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2336 ictx->touch = imon_init_touch(ictx); 2337 if (!ictx->touch) 2338 goto touch_setup_failed; 2339 } else 2340 ictx->touch = NULL; 2341 2342 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2343 usb_rcvintpipe(ictx->usbdev_intf1, 2344 ictx->rx_endpoint_intf1->bEndpointAddress), 2345 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2346 usb_rx_callback_intf1, ictx, 2347 ictx->rx_endpoint_intf1->bInterval); 2348 2349 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL); 2350 2351 if (ret) { 2352 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret); 2353 goto urb_submit_failed; 2354 } 2355 2356 ictx->dev_present_intf1 = true; 2357 2358 mutex_unlock(&ictx->lock); 2359 return ictx; 2360 2361urb_submit_failed: 2362 if (ictx->touch) 2363 input_unregister_device(ictx->touch); 2364touch_setup_failed: 2365find_endpoint_failed: 2366 usb_put_dev(ictx->usbdev_intf1); 2367 ictx->usbdev_intf1 = NULL; 2368 mutex_unlock(&ictx->lock); 2369 usb_free_urb(rx_urb); 2370 ictx->rx_urb_intf1 = NULL; 2371rx_urb_alloc_failed: 2372 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret); 2373 2374 return NULL; 2375} 2376 2377static void imon_init_display(struct imon_context *ictx, 2378 struct usb_interface *intf) 2379{ 2380 int ret; 2381 2382 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n"); 2383 2384 /* set up sysfs entry for built-in clock */ 2385 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group); 2386 if (ret) 2387 dev_err(ictx->dev, "Could not create display sysfs entries(%d)", 2388 ret); 2389 2390 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2391 ret = usb_register_dev(intf, &imon_lcd_class); 2392 else 2393 ret = usb_register_dev(intf, &imon_vfd_class); 2394 if (ret) 2395 /* Not a fatal error, so ignore */ 2396 dev_info(ictx->dev, "could not get a minor number for display\n"); 2397 2398} 2399 2400/* 2401 * Callback function for USB core API: Probe 2402 */ 2403static int imon_probe(struct usb_interface *interface, 2404 const struct usb_device_id *id) 2405{ 2406 struct usb_device *usbdev = NULL; 2407 struct usb_host_interface *iface_desc = NULL; 2408 struct usb_interface *first_if; 2409 struct device *dev = &interface->dev; 2410 int ifnum, sysfs_err; 2411 int ret = 0; 2412 struct imon_context *ictx = NULL; 2413 u16 vendor, product; 2414 2415 usbdev = usb_get_dev(interface_to_usbdev(interface)); 2416 iface_desc = interface->cur_altsetting; 2417 ifnum = iface_desc->desc.bInterfaceNumber; 2418 vendor = le16_to_cpu(usbdev->descriptor.idVendor); 2419 product = le16_to_cpu(usbdev->descriptor.idProduct); 2420 2421 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n", 2422 __func__, vendor, product, ifnum); 2423 2424 first_if = usb_ifnum_to_if(usbdev, 0); 2425 if (!first_if) { 2426 ret = -ENODEV; 2427 goto fail; 2428 } 2429 2430 if (first_if->dev.driver != interface->dev.driver) { 2431 dev_err(&interface->dev, "inconsistent driver matching\n"); 2432 ret = -EINVAL; 2433 goto fail; 2434 } 2435 2436 if (ifnum == 0) { 2437 ictx = imon_init_intf0(interface, id); 2438 if (!ictx) { 2439 pr_err("failed to initialize context!\n"); 2440 ret = -ENODEV; 2441 goto fail; 2442 } 2443 refcount_set(&ictx->users, 1); 2444 2445 } else { 2446 /* this is the secondary interface on the device */ 2447 struct imon_context *first_if_ctx = usb_get_intfdata(first_if); 2448 2449 /* fail early if first intf failed to register */ 2450 if (!first_if_ctx) { 2451 ret = -ENODEV; 2452 goto fail; 2453 } 2454 2455 ictx = imon_init_intf1(interface, first_if_ctx); 2456 if (!ictx) { 2457 pr_err("failed to attach to context!\n"); 2458 ret = -ENODEV; 2459 goto fail; 2460 } 2461 refcount_inc(&ictx->users); 2462 2463 } 2464 2465 usb_set_intfdata(interface, ictx); 2466 2467 if (ifnum == 0) { 2468 if (product == 0xffdc && ictx->rf_device) { 2469 sysfs_err = sysfs_create_group(&interface->dev.kobj, 2470 &imon_rf_attr_group); 2471 if (sysfs_err) 2472 pr_err("Could not create RF sysfs entries(%d)\n", 2473 sysfs_err); 2474 } 2475 2476 if (ictx->display_supported) 2477 imon_init_display(ictx, interface); 2478 } 2479 2480 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n", 2481 vendor, product, ifnum, 2482 usbdev->bus->busnum, usbdev->devnum); 2483 2484 usb_put_dev(usbdev); 2485 2486 return 0; 2487 2488fail: 2489 usb_put_dev(usbdev); 2490 dev_err(dev, "unable to register, err %d\n", ret); 2491 2492 return ret; 2493} 2494 2495/* 2496 * Callback function for USB core API: disconnect 2497 */ 2498static void imon_disconnect(struct usb_interface *interface) 2499{ 2500 struct imon_context *ictx; 2501 struct device *dev; 2502 int ifnum; 2503 2504 ictx = usb_get_intfdata(interface); 2505 ictx->disconnected = true; 2506 dev = ictx->dev; 2507 ifnum = interface->cur_altsetting->desc.bInterfaceNumber; 2508 2509 /* 2510 * sysfs_remove_group is safe to call even if sysfs_create_group 2511 * hasn't been called 2512 */ 2513 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group); 2514 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group); 2515 2516 usb_set_intfdata(interface, NULL); 2517 2518 /* Abort ongoing write */ 2519 if (ictx->tx.busy) { 2520 usb_kill_urb(ictx->tx_urb); 2521 complete(&ictx->tx.finished); 2522 } 2523 2524 if (ifnum == 0) { 2525 ictx->dev_present_intf0 = false; 2526 usb_kill_urb(ictx->rx_urb_intf0); 2527 input_unregister_device(ictx->idev); 2528 rc_unregister_device(ictx->rdev); 2529 if (ictx->display_supported) { 2530 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2531 usb_deregister_dev(interface, &imon_lcd_class); 2532 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD) 2533 usb_deregister_dev(interface, &imon_vfd_class); 2534 } 2535 usb_put_dev(ictx->usbdev_intf0); 2536 } else { 2537 ictx->dev_present_intf1 = false; 2538 usb_kill_urb(ictx->rx_urb_intf1); 2539 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2540 del_timer_sync(&ictx->ttimer); 2541 input_unregister_device(ictx->touch); 2542 } 2543 usb_put_dev(ictx->usbdev_intf1); 2544 } 2545 2546 if (refcount_dec_and_test(&ictx->users)) 2547 free_imon_context(ictx); 2548 2549 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n", 2550 __func__, ifnum); 2551} 2552 2553static int imon_suspend(struct usb_interface *intf, pm_message_t message) 2554{ 2555 struct imon_context *ictx = usb_get_intfdata(intf); 2556 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2557 2558 if (ifnum == 0) 2559 usb_kill_urb(ictx->rx_urb_intf0); 2560 else 2561 usb_kill_urb(ictx->rx_urb_intf1); 2562 2563 return 0; 2564} 2565 2566static int imon_resume(struct usb_interface *intf) 2567{ 2568 int rc = 0; 2569 struct imon_context *ictx = usb_get_intfdata(intf); 2570 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2571 2572 if (ifnum == 0) { 2573 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2574 usb_rcvintpipe(ictx->usbdev_intf0, 2575 ictx->rx_endpoint_intf0->bEndpointAddress), 2576 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2577 usb_rx_callback_intf0, ictx, 2578 ictx->rx_endpoint_intf0->bInterval); 2579 2580 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_NOIO); 2581 2582 } else { 2583 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2584 usb_rcvintpipe(ictx->usbdev_intf1, 2585 ictx->rx_endpoint_intf1->bEndpointAddress), 2586 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2587 usb_rx_callback_intf1, ictx, 2588 ictx->rx_endpoint_intf1->bInterval); 2589 2590 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_NOIO); 2591 } 2592 2593 return rc; 2594} 2595 2596module_usb_driver(imon_driver); 2597