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 int retval; 687 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00, 688 0x00, 0x00, 0x00, 0x20 }; 689 690 if (!ictx) { 691 pr_err("no context for device\n"); 692 return -ENODEV; 693 } 694 695 if (!ictx->dev_present_intf0) { 696 pr_err("no iMON device present\n"); 697 return -ENODEV; 698 } 699 700 memcpy(ictx->usb_tx_buf, packet, sizeof(packet)); 701 retval = send_packet(ictx); 702 703 return retval; 704} 705 706/* 707 * Sends packets to setup and show clock on iMON display 708 * 709 * Arguments: year - last 2 digits of year, month - 1..12, 710 * day - 1..31, dow - day of the week (0-Sun...6-Sat), 711 * hour - 0..23, minute - 0..59, second - 0..59 712 */ 713static int send_set_imon_clock(struct imon_context *ictx, 714 unsigned int year, unsigned int month, 715 unsigned int day, unsigned int dow, 716 unsigned int hour, unsigned int minute, 717 unsigned int second) 718{ 719 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8]; 720 int retval = 0; 721 int i; 722 723 if (!ictx) { 724 pr_err("no context for device\n"); 725 return -ENODEV; 726 } 727 728 switch (ictx->display_type) { 729 case IMON_DISPLAY_TYPE_LCD: 730 clock_enable_pkt[0][0] = 0x80; 731 clock_enable_pkt[0][1] = year; 732 clock_enable_pkt[0][2] = month-1; 733 clock_enable_pkt[0][3] = day; 734 clock_enable_pkt[0][4] = hour; 735 clock_enable_pkt[0][5] = minute; 736 clock_enable_pkt[0][6] = second; 737 738 clock_enable_pkt[1][0] = 0x80; 739 clock_enable_pkt[1][1] = 0; 740 clock_enable_pkt[1][2] = 0; 741 clock_enable_pkt[1][3] = 0; 742 clock_enable_pkt[1][4] = 0; 743 clock_enable_pkt[1][5] = 0; 744 clock_enable_pkt[1][6] = 0; 745 746 if (ictx->product == 0xffdc) { 747 clock_enable_pkt[0][7] = 0x50; 748 clock_enable_pkt[1][7] = 0x51; 749 } else { 750 clock_enable_pkt[0][7] = 0x88; 751 clock_enable_pkt[1][7] = 0x8a; 752 } 753 754 break; 755 756 case IMON_DISPLAY_TYPE_VFD: 757 clock_enable_pkt[0][0] = year; 758 clock_enable_pkt[0][1] = month-1; 759 clock_enable_pkt[0][2] = day; 760 clock_enable_pkt[0][3] = dow; 761 clock_enable_pkt[0][4] = hour; 762 clock_enable_pkt[0][5] = minute; 763 clock_enable_pkt[0][6] = second; 764 clock_enable_pkt[0][7] = 0x40; 765 766 clock_enable_pkt[1][0] = 0; 767 clock_enable_pkt[1][1] = 0; 768 clock_enable_pkt[1][2] = 1; 769 clock_enable_pkt[1][3] = 0; 770 clock_enable_pkt[1][4] = 0; 771 clock_enable_pkt[1][5] = 0; 772 clock_enable_pkt[1][6] = 0; 773 clock_enable_pkt[1][7] = 0x42; 774 775 break; 776 777 default: 778 return -ENODEV; 779 } 780 781 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) { 782 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8); 783 retval = send_packet(ictx); 784 if (retval) { 785 pr_err("send_packet failed for packet %d\n", i); 786 break; 787 } 788 } 789 790 return retval; 791} 792 793/* 794 * These are the sysfs functions to handle the association on the iMON 2.4G LT. 795 */ 796static ssize_t show_associate_remote(struct device *d, 797 struct device_attribute *attr, 798 char *buf) 799{ 800 struct imon_context *ictx = dev_get_drvdata(d); 801 802 if (!ictx) 803 return -ENODEV; 804 805 mutex_lock(&ictx->lock); 806 if (ictx->rf_isassociating) 807 strscpy(buf, "associating\n", PAGE_SIZE); 808 else 809 strscpy(buf, "closed\n", PAGE_SIZE); 810 811 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"); 812 mutex_unlock(&ictx->lock); 813 return strlen(buf); 814} 815 816static ssize_t store_associate_remote(struct device *d, 817 struct device_attribute *attr, 818 const char *buf, size_t count) 819{ 820 struct imon_context *ictx; 821 822 ictx = dev_get_drvdata(d); 823 824 if (!ictx) 825 return -ENODEV; 826 827 mutex_lock(&ictx->lock); 828 ictx->rf_isassociating = true; 829 send_associate_24g(ictx); 830 mutex_unlock(&ictx->lock); 831 832 return count; 833} 834 835/* 836 * sysfs functions to control internal imon clock 837 */ 838static ssize_t show_imon_clock(struct device *d, 839 struct device_attribute *attr, char *buf) 840{ 841 struct imon_context *ictx = dev_get_drvdata(d); 842 size_t len; 843 844 if (!ictx) 845 return -ENODEV; 846 847 mutex_lock(&ictx->lock); 848 849 if (!ictx->display_supported) { 850 len = snprintf(buf, PAGE_SIZE, "Not supported."); 851 } else { 852 len = snprintf(buf, PAGE_SIZE, 853 "To set the clock on your iMON display:\n" 854 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n" 855 "%s", ictx->display_isopen ? 856 "\nNOTE: imon device must be closed\n" : ""); 857 } 858 859 mutex_unlock(&ictx->lock); 860 861 return len; 862} 863 864static ssize_t store_imon_clock(struct device *d, 865 struct device_attribute *attr, 866 const char *buf, size_t count) 867{ 868 struct imon_context *ictx = dev_get_drvdata(d); 869 ssize_t retval; 870 unsigned int year, month, day, dow, hour, minute, second; 871 872 if (!ictx) 873 return -ENODEV; 874 875 mutex_lock(&ictx->lock); 876 877 if (!ictx->display_supported) { 878 retval = -ENODEV; 879 goto exit; 880 } else if (ictx->display_isopen) { 881 retval = -EBUSY; 882 goto exit; 883 } 884 885 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow, 886 &hour, &minute, &second) != 7) { 887 retval = -EINVAL; 888 goto exit; 889 } 890 891 if ((month < 1 || month > 12) || 892 (day < 1 || day > 31) || (dow > 6) || 893 (hour > 23) || (minute > 59) || (second > 59)) { 894 retval = -EINVAL; 895 goto exit; 896 } 897 898 retval = send_set_imon_clock(ictx, year, month, day, dow, 899 hour, minute, second); 900 if (retval) 901 goto exit; 902 903 retval = count; 904exit: 905 mutex_unlock(&ictx->lock); 906 907 return retval; 908} 909 910 911static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock, 912 store_imon_clock); 913 914static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote, 915 store_associate_remote); 916 917static struct attribute *imon_display_sysfs_entries[] = { 918 &dev_attr_imon_clock.attr, 919 NULL 920}; 921 922static const struct attribute_group imon_display_attr_group = { 923 .attrs = imon_display_sysfs_entries 924}; 925 926static struct attribute *imon_rf_sysfs_entries[] = { 927 &dev_attr_associate_remote.attr, 928 NULL 929}; 930 931static const struct attribute_group imon_rf_attr_group = { 932 .attrs = imon_rf_sysfs_entries 933}; 934 935/* 936 * Writes data to the VFD. The iMON VFD is 2x16 characters 937 * and requires data in 5 consecutive USB interrupt packets, 938 * each packet but the last carrying 7 bytes. 939 * 940 * I don't know if the VFD board supports features such as 941 * scrolling, clearing rows, blanking, etc. so at 942 * the caller must provide a full screen of data. If fewer 943 * than 32 bytes are provided spaces will be appended to 944 * generate a full screen. 945 */ 946static ssize_t vfd_write(struct file *file, const char __user *buf, 947 size_t n_bytes, loff_t *pos) 948{ 949 int i; 950 int offset; 951 int seq; 952 int retval = 0; 953 struct imon_context *ictx = file->private_data; 954 static const unsigned char vfd_packet6[] = { 955 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; 956 957 if (ictx->disconnected) 958 return -ENODEV; 959 960 if (mutex_lock_interruptible(&ictx->lock)) 961 return -ERESTARTSYS; 962 963 if (!ictx->dev_present_intf0) { 964 pr_err_ratelimited("no iMON device present\n"); 965 retval = -ENODEV; 966 goto exit; 967 } 968 969 if (n_bytes <= 0 || n_bytes > 32) { 970 pr_err_ratelimited("invalid payload size\n"); 971 retval = -EINVAL; 972 goto exit; 973 } 974 975 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) { 976 retval = -EFAULT; 977 goto exit; 978 } 979 980 /* Pad with spaces */ 981 for (i = n_bytes; i < 32; ++i) 982 ictx->tx.data_buf[i] = ' '; 983 984 for (i = 32; i < 35; ++i) 985 ictx->tx.data_buf[i] = 0xFF; 986 987 offset = 0; 988 seq = 0; 989 990 do { 991 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7); 992 ictx->usb_tx_buf[7] = (unsigned char) seq; 993 994 retval = send_packet(ictx); 995 if (retval) { 996 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 997 goto exit; 998 } else { 999 seq += 2; 1000 offset += 7; 1001 } 1002 1003 } while (offset < 35); 1004 1005 /* Send packet #6 */ 1006 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); 1007 ictx->usb_tx_buf[7] = (unsigned char) seq; 1008 retval = send_packet(ictx); 1009 if (retval) 1010 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 1011 1012exit: 1013 mutex_unlock(&ictx->lock); 1014 1015 return (!retval) ? n_bytes : retval; 1016} 1017 1018/* 1019 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte 1020 * packets. We accept data as 16 hexadecimal digits, followed by a 1021 * newline (to make it easy to drive the device from a command-line 1022 * -- even though the actual binary data is a bit complicated). 1023 * 1024 * The device itself is not a "traditional" text-mode display. It's 1025 * actually a 16x96 pixel bitmap display. That means if you want to 1026 * display text, you've got to have your own "font" and translate the 1027 * text into bitmaps for display. This is really flexible (you can 1028 * display whatever diacritics you need, and so on), but it's also 1029 * a lot more complicated than most LCDs... 1030 */ 1031static ssize_t lcd_write(struct file *file, const char __user *buf, 1032 size_t n_bytes, loff_t *pos) 1033{ 1034 int retval = 0; 1035 struct imon_context *ictx = file->private_data; 1036 1037 if (ictx->disconnected) 1038 return -ENODEV; 1039 1040 mutex_lock(&ictx->lock); 1041 1042 if (!ictx->display_supported) { 1043 pr_err_ratelimited("no iMON display present\n"); 1044 retval = -ENODEV; 1045 goto exit; 1046 } 1047 1048 if (n_bytes != 8) { 1049 pr_err_ratelimited("invalid payload size: %d (expected 8)\n", 1050 (int)n_bytes); 1051 retval = -EINVAL; 1052 goto exit; 1053 } 1054 1055 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) { 1056 retval = -EFAULT; 1057 goto exit; 1058 } 1059 1060 retval = send_packet(ictx); 1061 if (retval) { 1062 pr_err_ratelimited("send packet failed!\n"); 1063 goto exit; 1064 } else { 1065 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n", 1066 __func__, (int) n_bytes); 1067 } 1068exit: 1069 mutex_unlock(&ictx->lock); 1070 return (!retval) ? n_bytes : retval; 1071} 1072 1073/* 1074 * Callback function for USB core API: transmit data 1075 */ 1076static void usb_tx_callback(struct urb *urb) 1077{ 1078 struct imon_context *ictx; 1079 1080 if (!urb) 1081 return; 1082 ictx = (struct imon_context *)urb->context; 1083 if (!ictx) 1084 return; 1085 1086 ictx->tx.status = urb->status; 1087 1088 /* notify waiters that write has finished */ 1089 ictx->tx.busy = false; 1090 smp_rmb(); /* ensure later readers know we're not busy */ 1091 complete(&ictx->tx.finished); 1092} 1093 1094/* 1095 * report touchscreen input 1096 */ 1097static void imon_touch_display_timeout(struct timer_list *t) 1098{ 1099 struct imon_context *ictx = from_timer(ictx, t, ttimer); 1100 1101 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA) 1102 return; 1103 1104 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1105 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1106 input_report_key(ictx->touch, BTN_TOUCH, 0x00); 1107 input_sync(ictx->touch); 1108} 1109 1110/* 1111 * iMON IR receivers support two different signal sets -- those used by 1112 * the iMON remotes, and those used by the Windows MCE remotes (which is 1113 * really just RC-6), but only one or the other at a time, as the signals 1114 * are decoded onboard the receiver. 1115 * 1116 * This function gets called two different ways, one way is from 1117 * rc_register_device, for initial protocol selection/setup, and the other is 1118 * via a userspace-initiated protocol change request, either by direct sysfs 1119 * prodding or by something like ir-keytable. In the rc_register_device case, 1120 * the imon context lock is already held, but when initiated from userspace, 1121 * it is not, so we must acquire it prior to calling send_packet, which 1122 * requires that the lock is held. 1123 */ 1124static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto) 1125{ 1126 int retval; 1127 struct imon_context *ictx = rc->priv; 1128 struct device *dev = ictx->dev; 1129 bool unlock = false; 1130 unsigned char ir_proto_packet[] = { 1131 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 }; 1132 1133 if (*rc_proto && !(*rc_proto & rc->allowed_protocols)) 1134 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n"); 1135 1136 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) { 1137 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n"); 1138 ir_proto_packet[0] = 0x01; 1139 *rc_proto = RC_PROTO_BIT_RC6_MCE; 1140 } else if (*rc_proto & RC_PROTO_BIT_IMON) { 1141 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n"); 1142 if (!pad_stabilize) 1143 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1144 /* ir_proto_packet[0] = 0x00; // already the default */ 1145 *rc_proto = RC_PROTO_BIT_IMON; 1146 } else { 1147 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n"); 1148 if (!pad_stabilize) 1149 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1150 /* ir_proto_packet[0] = 0x00; // already the default */ 1151 *rc_proto = RC_PROTO_BIT_IMON; 1152 } 1153 1154 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet)); 1155 1156 if (!mutex_is_locked(&ictx->lock)) { 1157 unlock = true; 1158 mutex_lock(&ictx->lock); 1159 } 1160 1161 retval = send_packet(ictx); 1162 if (retval) 1163 goto out; 1164 1165 ictx->rc_proto = *rc_proto; 1166 ictx->pad_mouse = false; 1167 1168out: 1169 if (unlock) 1170 mutex_unlock(&ictx->lock); 1171 1172 return retval; 1173} 1174 1175/* 1176 * The directional pad behaves a bit differently, depending on whether this is 1177 * one of the older ffdc devices or a newer device. Newer devices appear to 1178 * have a higher resolution matrix for more precise mouse movement, but it 1179 * makes things overly sensitive in keyboard mode, so we do some interesting 1180 * contortions to make it less touchy. Older devices run through the same 1181 * routine with shorter timeout and a smaller threshold. 1182 */ 1183static int stabilize(int a, int b, u16 timeout, u16 threshold) 1184{ 1185 ktime_t ct; 1186 static ktime_t prev_time; 1187 static ktime_t hit_time; 1188 static int x, y, prev_result, hits; 1189 int result = 0; 1190 long msec, msec_hit; 1191 1192 ct = ktime_get(); 1193 msec = ktime_ms_delta(ct, prev_time); 1194 msec_hit = ktime_ms_delta(ct, hit_time); 1195 1196 if (msec > 100) { 1197 x = 0; 1198 y = 0; 1199 hits = 0; 1200 } 1201 1202 x += a; 1203 y += b; 1204 1205 prev_time = ct; 1206 1207 if (abs(x) > threshold || abs(y) > threshold) { 1208 if (abs(y) > abs(x)) 1209 result = (y > 0) ? 0x7F : 0x80; 1210 else 1211 result = (x > 0) ? 0x7F00 : 0x8000; 1212 1213 x = 0; 1214 y = 0; 1215 1216 if (result == prev_result) { 1217 hits++; 1218 1219 if (hits > 3) { 1220 switch (result) { 1221 case 0x7F: 1222 y = 17 * threshold / 30; 1223 break; 1224 case 0x80: 1225 y -= 17 * threshold / 30; 1226 break; 1227 case 0x7F00: 1228 x = 17 * threshold / 30; 1229 break; 1230 case 0x8000: 1231 x -= 17 * threshold / 30; 1232 break; 1233 } 1234 } 1235 1236 if (hits == 2 && msec_hit < timeout) { 1237 result = 0; 1238 hits = 1; 1239 } 1240 } else { 1241 prev_result = result; 1242 hits = 1; 1243 hit_time = ct; 1244 } 1245 } 1246 1247 return result; 1248} 1249 1250static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode) 1251{ 1252 u32 keycode; 1253 u32 release; 1254 bool is_release_code = false; 1255 1256 /* Look for the initial press of a button */ 1257 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1258 ictx->rc_toggle = 0x0; 1259 ictx->rc_scancode = scancode; 1260 1261 /* Look for the release of a button */ 1262 if (keycode == KEY_RESERVED) { 1263 release = scancode & ~0x4000; 1264 keycode = rc_g_keycode_from_table(ictx->rdev, release); 1265 if (keycode != KEY_RESERVED) 1266 is_release_code = true; 1267 } 1268 1269 ictx->release_code = is_release_code; 1270 1271 return keycode; 1272} 1273 1274static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode) 1275{ 1276 u32 keycode; 1277 1278#define MCE_KEY_MASK 0x7000 1279#define MCE_TOGGLE_BIT 0x8000 1280 1281 /* 1282 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx 1283 * (the toggle bit flipping between alternating key presses), while 1284 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep 1285 * the table trim, we always or in the bits to look up 0x8000ff4xx, 1286 * but we can't or them into all codes, as some keys are decoded in 1287 * a different way w/o the same use of the toggle bit... 1288 */ 1289 if (scancode & 0x80000000) 1290 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT; 1291 1292 ictx->rc_scancode = scancode; 1293 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1294 1295 /* not used in mce mode, but make sure we know its false */ 1296 ictx->release_code = false; 1297 1298 return keycode; 1299} 1300 1301static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code) 1302{ 1303 const struct imon_panel_key_table *key_table; 1304 u32 keycode = KEY_RESERVED; 1305 int i; 1306 1307 key_table = ictx->dev_descr->key_table; 1308 1309 for (i = 0; key_table[i].hw_code != 0; i++) { 1310 if (key_table[i].hw_code == (code | 0xffee)) { 1311 keycode = key_table[i].keycode; 1312 break; 1313 } 1314 } 1315 ictx->release_code = false; 1316 return keycode; 1317} 1318 1319static bool imon_mouse_event(struct imon_context *ictx, 1320 unsigned char *buf, int len) 1321{ 1322 signed char rel_x = 0x00, rel_y = 0x00; 1323 u8 right_shift = 1; 1324 bool mouse_input = true; 1325 int dir = 0; 1326 unsigned long flags; 1327 1328 spin_lock_irqsave(&ictx->kc_lock, flags); 1329 1330 /* newer iMON device PAD or mouse button */ 1331 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) { 1332 rel_x = buf[2]; 1333 rel_y = buf[3]; 1334 right_shift = 1; 1335 /* 0xffdc iMON PAD or mouse button input */ 1336 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) && 1337 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) { 1338 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1339 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1340 if (buf[0] & 0x02) 1341 rel_x |= ~0x0f; 1342 rel_x = rel_x + rel_x / 2; 1343 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1344 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1345 if (buf[0] & 0x01) 1346 rel_y |= ~0x0f; 1347 rel_y = rel_y + rel_y / 2; 1348 right_shift = 2; 1349 /* some ffdc devices decode mouse buttons differently... */ 1350 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) { 1351 right_shift = 2; 1352 /* ch+/- buttons, which we use for an emulated scroll wheel */ 1353 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) { 1354 dir = 1; 1355 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) { 1356 dir = -1; 1357 } else 1358 mouse_input = false; 1359 1360 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1361 1362 if (mouse_input) { 1363 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n"); 1364 1365 if (dir) { 1366 input_report_rel(ictx->idev, REL_WHEEL, dir); 1367 } else if (rel_x || rel_y) { 1368 input_report_rel(ictx->idev, REL_X, rel_x); 1369 input_report_rel(ictx->idev, REL_Y, rel_y); 1370 } else { 1371 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1); 1372 input_report_key(ictx->idev, BTN_RIGHT, 1373 buf[1] >> right_shift & 0x1); 1374 } 1375 input_sync(ictx->idev); 1376 spin_lock_irqsave(&ictx->kc_lock, flags); 1377 ictx->last_keycode = ictx->kc; 1378 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1379 } 1380 1381 return mouse_input; 1382} 1383 1384static void imon_touch_event(struct imon_context *ictx, unsigned char *buf) 1385{ 1386 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT); 1387 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4); 1388 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf)); 1389 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1390 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1391 input_report_key(ictx->touch, BTN_TOUCH, 0x01); 1392 input_sync(ictx->touch); 1393} 1394 1395static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf) 1396{ 1397 int dir = 0; 1398 signed char rel_x = 0x00, rel_y = 0x00; 1399 u16 timeout, threshold; 1400 u32 scancode = KEY_RESERVED; 1401 unsigned long flags; 1402 1403 /* 1404 * The imon directional pad functions more like a touchpad. Bytes 3 & 4 1405 * contain a position coordinate (x,y), with each component ranging 1406 * from -14 to 14. We want to down-sample this to only 4 discrete values 1407 * for up/down/left/right arrow keys. Also, when you get too close to 1408 * diagonals, it has a tendency to jump back and forth, so lets try to 1409 * ignore when they get too close. 1410 */ 1411 if (ictx->product != 0xffdc) { 1412 /* first, pad to 8 bytes so it conforms with everything else */ 1413 buf[5] = buf[6] = buf[7] = 0; 1414 timeout = 500; /* in msecs */ 1415 /* (2*threshold) x (2*threshold) square */ 1416 threshold = pad_thresh ? pad_thresh : 28; 1417 rel_x = buf[2]; 1418 rel_y = buf[3]; 1419 1420 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1421 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) { 1422 dir = stabilize((int)rel_x, (int)rel_y, 1423 timeout, threshold); 1424 if (!dir) { 1425 spin_lock_irqsave(&ictx->kc_lock, 1426 flags); 1427 ictx->kc = KEY_UNKNOWN; 1428 spin_unlock_irqrestore(&ictx->kc_lock, 1429 flags); 1430 return; 1431 } 1432 buf[2] = dir & 0xFF; 1433 buf[3] = (dir >> 8) & 0xFF; 1434 scancode = be32_to_cpu(*((__be32 *)buf)); 1435 } 1436 } else { 1437 /* 1438 * Hack alert: instead of using keycodes, we have 1439 * to use hard-coded scancodes here... 1440 */ 1441 if (abs(rel_y) > abs(rel_x)) { 1442 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1443 buf[3] = 0; 1444 if (rel_y > 0) 1445 scancode = 0x01007f00; /* KEY_DOWN */ 1446 else 1447 scancode = 0x01008000; /* KEY_UP */ 1448 } else { 1449 buf[2] = 0; 1450 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1451 if (rel_x > 0) 1452 scancode = 0x0100007f; /* KEY_RIGHT */ 1453 else 1454 scancode = 0x01000080; /* KEY_LEFT */ 1455 } 1456 } 1457 1458 /* 1459 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad 1460 * device (15c2:ffdc). The remote generates various codes from 1461 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates 1462 * 0x688301b7 and the right one 0x688481b7. All other keys generate 1463 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with 1464 * reversed endianness. Extract direction from buffer, rotate endianness, 1465 * adjust sign and feed the values into stabilize(). The resulting codes 1466 * will be 0x01008000, 0x01007F00, which match the newer devices. 1467 */ 1468 } else { 1469 timeout = 10; /* in msecs */ 1470 /* (2*threshold) x (2*threshold) square */ 1471 threshold = pad_thresh ? pad_thresh : 15; 1472 1473 /* buf[1] is x */ 1474 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1475 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1476 if (buf[0] & 0x02) 1477 rel_x |= ~0x10+1; 1478 /* buf[2] is y */ 1479 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1480 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1481 if (buf[0] & 0x01) 1482 rel_y |= ~0x10+1; 1483 1484 buf[0] = 0x01; 1485 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0; 1486 1487 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1488 dir = stabilize((int)rel_x, (int)rel_y, 1489 timeout, threshold); 1490 if (!dir) { 1491 spin_lock_irqsave(&ictx->kc_lock, flags); 1492 ictx->kc = KEY_UNKNOWN; 1493 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1494 return; 1495 } 1496 buf[2] = dir & 0xFF; 1497 buf[3] = (dir >> 8) & 0xFF; 1498 scancode = be32_to_cpu(*((__be32 *)buf)); 1499 } else { 1500 /* 1501 * Hack alert: instead of using keycodes, we have 1502 * to use hard-coded scancodes here... 1503 */ 1504 if (abs(rel_y) > abs(rel_x)) { 1505 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1506 buf[3] = 0; 1507 if (rel_y > 0) 1508 scancode = 0x01007f00; /* KEY_DOWN */ 1509 else 1510 scancode = 0x01008000; /* KEY_UP */ 1511 } else { 1512 buf[2] = 0; 1513 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1514 if (rel_x > 0) 1515 scancode = 0x0100007f; /* KEY_RIGHT */ 1516 else 1517 scancode = 0x01000080; /* KEY_LEFT */ 1518 } 1519 } 1520 } 1521 1522 if (scancode) { 1523 spin_lock_irqsave(&ictx->kc_lock, flags); 1524 ictx->kc = imon_remote_key_lookup(ictx, scancode); 1525 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1526 } 1527} 1528 1529/* 1530 * figure out if these is a press or a release. We don't actually 1531 * care about repeats, as those will be auto-generated within the IR 1532 * subsystem for repeating scancodes. 1533 */ 1534static int imon_parse_press_type(struct imon_context *ictx, 1535 unsigned char *buf, u8 ktype) 1536{ 1537 int press_type = 0; 1538 unsigned long flags; 1539 1540 spin_lock_irqsave(&ictx->kc_lock, flags); 1541 1542 /* key release of 0x02XXXXXX key */ 1543 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00) 1544 ictx->kc = ictx->last_keycode; 1545 1546 /* mouse button release on (some) 0xffdc devices */ 1547 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 && 1548 buf[2] == 0x81 && buf[3] == 0xb7) 1549 ictx->kc = ictx->last_keycode; 1550 1551 /* mouse button release on (some other) 0xffdc devices */ 1552 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 && 1553 buf[2] == 0x81 && buf[3] == 0xb7) 1554 ictx->kc = ictx->last_keycode; 1555 1556 /* mce-specific button handling, no keyup events */ 1557 else if (ktype == IMON_KEY_MCE) { 1558 ictx->rc_toggle = buf[2]; 1559 press_type = 1; 1560 1561 /* incoherent or irrelevant data */ 1562 } else if (ictx->kc == KEY_RESERVED) 1563 press_type = -EINVAL; 1564 1565 /* key release of 0xXXXXXXb7 key */ 1566 else if (ictx->release_code) 1567 press_type = 0; 1568 1569 /* this is a button press */ 1570 else 1571 press_type = 1; 1572 1573 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1574 1575 return press_type; 1576} 1577 1578/* 1579 * Process the incoming packet 1580 */ 1581static void imon_incoming_packet(struct imon_context *ictx, 1582 struct urb *urb, int intf) 1583{ 1584 int len = urb->actual_length; 1585 unsigned char *buf = urb->transfer_buffer; 1586 struct device *dev = ictx->dev; 1587 unsigned long flags; 1588 u32 kc; 1589 u64 scancode; 1590 int press_type = 0; 1591 ktime_t t; 1592 static ktime_t prev_time; 1593 u8 ktype; 1594 1595 /* filter out junk data on the older 0xffdc imon devices */ 1596 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff)) 1597 return; 1598 1599 /* Figure out what key was pressed */ 1600 if (len == 8 && buf[7] == 0xee) { 1601 scancode = be64_to_cpu(*((__be64 *)buf)); 1602 ktype = IMON_KEY_PANEL; 1603 kc = imon_panel_key_lookup(ictx, scancode); 1604 ictx->release_code = false; 1605 } else { 1606 scancode = be32_to_cpu(*((__be32 *)buf)); 1607 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) { 1608 ktype = IMON_KEY_IMON; 1609 if (buf[0] == 0x80) 1610 ktype = IMON_KEY_MCE; 1611 kc = imon_mce_key_lookup(ictx, scancode); 1612 } else { 1613 ktype = IMON_KEY_IMON; 1614 kc = imon_remote_key_lookup(ictx, scancode); 1615 } 1616 } 1617 1618 spin_lock_irqsave(&ictx->kc_lock, flags); 1619 /* keyboard/mouse mode toggle button */ 1620 if (kc == KEY_KEYBOARD && !ictx->release_code) { 1621 ictx->last_keycode = kc; 1622 if (!nomouse) { 1623 ictx->pad_mouse = !ictx->pad_mouse; 1624 dev_dbg(dev, "toggling to %s mode\n", 1625 ictx->pad_mouse ? "mouse" : "keyboard"); 1626 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1627 return; 1628 } else { 1629 ictx->pad_mouse = false; 1630 dev_dbg(dev, "mouse mode disabled, passing key value\n"); 1631 } 1632 } 1633 1634 ictx->kc = kc; 1635 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1636 1637 /* send touchscreen events through input subsystem if touchpad data */ 1638 if (ictx->touch && len == 8 && buf[7] == 0x86) { 1639 imon_touch_event(ictx, buf); 1640 return; 1641 1642 /* look for mouse events with pad in mouse mode */ 1643 } else if (ictx->pad_mouse) { 1644 if (imon_mouse_event(ictx, buf, len)) 1645 return; 1646 } 1647 1648 /* Now for some special handling to convert pad input to arrow keys */ 1649 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) || 1650 ((len == 8) && (buf[0] & 0x40) && 1651 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) { 1652 len = 8; 1653 imon_pad_to_keys(ictx, buf); 1654 } 1655 1656 if (debug) { 1657 printk(KERN_INFO "intf%d decoded packet: %*ph\n", 1658 intf, len, buf); 1659 } 1660 1661 press_type = imon_parse_press_type(ictx, buf, ktype); 1662 if (press_type < 0) 1663 goto not_input_data; 1664 1665 if (ktype != IMON_KEY_PANEL) { 1666 if (press_type == 0) 1667 rc_keyup(ictx->rdev); 1668 else { 1669 enum rc_proto proto; 1670 1671 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 1672 proto = RC_PROTO_RC6_MCE; 1673 else if (ictx->rc_proto == RC_PROTO_BIT_IMON) 1674 proto = RC_PROTO_IMON; 1675 else 1676 return; 1677 1678 rc_keydown(ictx->rdev, proto, ictx->rc_scancode, 1679 ictx->rc_toggle); 1680 1681 spin_lock_irqsave(&ictx->kc_lock, flags); 1682 ictx->last_keycode = ictx->kc; 1683 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1684 } 1685 return; 1686 } 1687 1688 /* Only panel type events left to process now */ 1689 spin_lock_irqsave(&ictx->kc_lock, flags); 1690 1691 t = ktime_get(); 1692 /* KEY repeats from knob and panel that need to be suppressed */ 1693 if (ictx->kc == KEY_MUTE || 1694 ictx->dev_descr->flags & IMON_SUPPRESS_REPEATED_KEYS) { 1695 if (ictx->kc == ictx->last_keycode && 1696 ktime_ms_delta(t, prev_time) < ictx->idev->rep[REP_DELAY]) { 1697 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1698 return; 1699 } 1700 } 1701 1702 prev_time = t; 1703 kc = ictx->kc; 1704 1705 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1706 1707 input_report_key(ictx->idev, kc, press_type); 1708 input_sync(ictx->idev); 1709 1710 /* panel keys don't generate a release */ 1711 input_report_key(ictx->idev, kc, 0); 1712 input_sync(ictx->idev); 1713 1714 spin_lock_irqsave(&ictx->kc_lock, flags); 1715 ictx->last_keycode = kc; 1716 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1717 1718 return; 1719 1720not_input_data: 1721 if (len != 8) { 1722 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n", 1723 __func__, len, intf); 1724 return; 1725 } 1726 1727 /* iMON 2.4G associate frame */ 1728 if (buf[0] == 0x00 && 1729 buf[2] == 0xFF && /* REFID */ 1730 buf[3] == 0xFF && 1731 buf[4] == 0xFF && 1732 buf[5] == 0xFF && /* iMON 2.4G */ 1733 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */ 1734 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */ 1735 dev_warn(dev, "%s: remote associated refid=%02X\n", 1736 __func__, buf[1]); 1737 ictx->rf_isassociating = false; 1738 } 1739} 1740 1741/* 1742 * Callback function for USB core API: receive data 1743 */ 1744static void usb_rx_callback_intf0(struct urb *urb) 1745{ 1746 struct imon_context *ictx; 1747 int intfnum = 0; 1748 1749 if (!urb) 1750 return; 1751 1752 ictx = (struct imon_context *)urb->context; 1753 if (!ictx) 1754 return; 1755 1756 /* 1757 * if we get a callback before we're done configuring the hardware, we 1758 * can't yet process the data, as there's nowhere to send it, but we 1759 * still need to submit a new rx URB to avoid wedging the hardware 1760 */ 1761 if (!ictx->dev_present_intf0) 1762 goto out; 1763 1764 switch (urb->status) { 1765 case -ENOENT: /* usbcore unlink successful! */ 1766 return; 1767 1768 case -ESHUTDOWN: /* transport endpoint was shut down */ 1769 break; 1770 1771 case 0: 1772 imon_incoming_packet(ictx, urb, intfnum); 1773 break; 1774 1775 default: 1776 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1777 __func__, urb->status); 1778 break; 1779 } 1780 1781out: 1782 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 1783} 1784 1785static void usb_rx_callback_intf1(struct urb *urb) 1786{ 1787 struct imon_context *ictx; 1788 int intfnum = 1; 1789 1790 if (!urb) 1791 return; 1792 1793 ictx = (struct imon_context *)urb->context; 1794 if (!ictx) 1795 return; 1796 1797 /* 1798 * if we get a callback before we're done configuring the hardware, we 1799 * can't yet process the data, as there's nowhere to send it, but we 1800 * still need to submit a new rx URB to avoid wedging the hardware 1801 */ 1802 if (!ictx->dev_present_intf1) 1803 goto out; 1804 1805 switch (urb->status) { 1806 case -ENOENT: /* usbcore unlink successful! */ 1807 return; 1808 1809 case -ESHUTDOWN: /* transport endpoint was shut down */ 1810 break; 1811 1812 case 0: 1813 imon_incoming_packet(ictx, urb, intfnum); 1814 break; 1815 1816 default: 1817 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1818 __func__, urb->status); 1819 break; 1820 } 1821 1822out: 1823 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 1824} 1825 1826/* 1827 * The 0x15c2:0xffdc device ID was used for umpteen different imon 1828 * devices, and all of them constantly spew interrupts, even when there 1829 * is no actual data to report. However, byte 6 of this buffer looks like 1830 * its unique across device variants, so we're trying to key off that to 1831 * figure out which display type (if any) and what IR protocol the device 1832 * actually supports. These devices have their IR protocol hard-coded into 1833 * their firmware, they can't be changed on the fly like the newer hardware. 1834 */ 1835static void imon_get_ffdc_type(struct imon_context *ictx) 1836{ 1837 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6]; 1838 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE; 1839 u64 allowed_protos = RC_PROTO_BIT_IMON; 1840 1841 switch (ffdc_cfg_byte) { 1842 /* iMON Knob, no display, iMON IR + vol knob */ 1843 case 0x21: 1844 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR"); 1845 ictx->display_supported = false; 1846 break; 1847 /* iMON 2.4G LT (usb stick), no display, iMON RF */ 1848 case 0x4e: 1849 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF"); 1850 ictx->display_supported = false; 1851 ictx->rf_device = true; 1852 break; 1853 /* iMON VFD, no IR (does have vol knob tho) */ 1854 case 0x35: 1855 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR"); 1856 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1857 break; 1858 /* iMON VFD, iMON IR */ 1859 case 0x24: 1860 case 0x30: 1861 case 0x85: 1862 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR"); 1863 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1864 break; 1865 /* iMON VFD, MCE IR */ 1866 case 0x46: 1867 case 0x9e: 1868 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR"); 1869 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1870 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1871 break; 1872 /* iMON VFD, iMON or MCE IR */ 1873 case 0x7e: 1874 dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR"); 1875 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1876 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1877 break; 1878 /* iMON LCD, MCE IR */ 1879 case 0x9f: 1880 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR"); 1881 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1882 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1883 break; 1884 /* no display, iMON IR */ 1885 case 0x26: 1886 dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR"); 1887 ictx->display_supported = false; 1888 break; 1889 /* Soundgraph iMON UltraBay */ 1890 case 0x98: 1891 dev_info(ictx->dev, "0xffdc iMON UltraBay, LCD + IR"); 1892 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1893 allowed_protos = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 1894 ictx->dev_descr = &ultrabay_table; 1895 break; 1896 1897 default: 1898 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR"); 1899 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1900 /* 1901 * We don't know which one it is, allow user to set the 1902 * RC6 one from userspace if IMON wasn't correct. 1903 */ 1904 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1905 break; 1906 } 1907 1908 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte); 1909 1910 ictx->display_type = detected_display_type; 1911 ictx->rc_proto = allowed_protos; 1912} 1913 1914static void imon_set_display_type(struct imon_context *ictx) 1915{ 1916 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1917 1918 /* 1919 * Try to auto-detect the type of display if the user hasn't set 1920 * it by hand via the display_type modparam. Default is VFD. 1921 */ 1922 1923 if (display_type == IMON_DISPLAY_TYPE_AUTO) { 1924 switch (ictx->product) { 1925 case 0xffdc: 1926 /* set in imon_get_ffdc_type() */ 1927 configured_display_type = ictx->display_type; 1928 break; 1929 case 0x0034: 1930 case 0x0035: 1931 configured_display_type = IMON_DISPLAY_TYPE_VGA; 1932 break; 1933 case 0x0038: 1934 case 0x0039: 1935 case 0x0045: 1936 configured_display_type = IMON_DISPLAY_TYPE_LCD; 1937 break; 1938 case 0x003c: 1939 case 0x0041: 1940 case 0x0042: 1941 case 0x0043: 1942 configured_display_type = IMON_DISPLAY_TYPE_NONE; 1943 ictx->display_supported = false; 1944 break; 1945 case 0x0036: 1946 case 0x0044: 1947 default: 1948 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1949 break; 1950 } 1951 } else { 1952 configured_display_type = display_type; 1953 if (display_type == IMON_DISPLAY_TYPE_NONE) 1954 ictx->display_supported = false; 1955 else 1956 ictx->display_supported = true; 1957 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n", 1958 __func__, display_type); 1959 } 1960 1961 ictx->display_type = configured_display_type; 1962} 1963 1964static struct rc_dev *imon_init_rdev(struct imon_context *ictx) 1965{ 1966 struct rc_dev *rdev; 1967 int ret; 1968 static const unsigned char fp_packet[] = { 1969 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 }; 1970 1971 rdev = rc_allocate_device(RC_DRIVER_SCANCODE); 1972 if (!rdev) { 1973 dev_err(ictx->dev, "remote control dev allocation failed\n"); 1974 goto out; 1975 } 1976 1977 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev), 1978 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product); 1979 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev, 1980 sizeof(ictx->phys_rdev)); 1981 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev)); 1982 1983 rdev->device_name = ictx->name_rdev; 1984 rdev->input_phys = ictx->phys_rdev; 1985 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id); 1986 rdev->dev.parent = ictx->dev; 1987 1988 rdev->priv = ictx; 1989 /* iMON PAD or MCE */ 1990 rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 1991 rdev->change_protocol = imon_ir_change_protocol; 1992 rdev->driver_name = MOD_NAME; 1993 1994 /* Enable front-panel buttons and/or knobs */ 1995 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet)); 1996 ret = send_packet(ictx); 1997 /* Not fatal, but warn about it */ 1998 if (ret) 1999 dev_info(ictx->dev, "panel buttons/knobs setup failed\n"); 2000 2001 if (ictx->product == 0xffdc) { 2002 imon_get_ffdc_type(ictx); 2003 rdev->allowed_protocols = ictx->rc_proto; 2004 } 2005 2006 imon_set_display_type(ictx); 2007 2008 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 2009 rdev->map_name = RC_MAP_IMON_MCE; 2010 else 2011 rdev->map_name = RC_MAP_IMON_PAD; 2012 2013 ret = rc_register_device(rdev); 2014 if (ret < 0) { 2015 dev_err(ictx->dev, "remote input dev register failed\n"); 2016 goto out; 2017 } 2018 2019 return rdev; 2020 2021out: 2022 rc_free_device(rdev); 2023 return NULL; 2024} 2025 2026static struct input_dev *imon_init_idev(struct imon_context *ictx) 2027{ 2028 const struct imon_panel_key_table *key_table; 2029 struct input_dev *idev; 2030 int ret, i; 2031 2032 key_table = ictx->dev_descr->key_table; 2033 2034 idev = input_allocate_device(); 2035 if (!idev) 2036 goto out; 2037 2038 snprintf(ictx->name_idev, sizeof(ictx->name_idev), 2039 "iMON Panel, Knob and Mouse(%04x:%04x)", 2040 ictx->vendor, ictx->product); 2041 idev->name = ictx->name_idev; 2042 2043 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev, 2044 sizeof(ictx->phys_idev)); 2045 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev)); 2046 idev->phys = ictx->phys_idev; 2047 2048 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL); 2049 2050 idev->keybit[BIT_WORD(BTN_MOUSE)] = 2051 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2052 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | 2053 BIT_MASK(REL_WHEEL); 2054 2055 /* panel and/or knob code support */ 2056 for (i = 0; key_table[i].hw_code != 0; i++) { 2057 u32 kc = key_table[i].keycode; 2058 __set_bit(kc, idev->keybit); 2059 } 2060 2061 usb_to_input_id(ictx->usbdev_intf0, &idev->id); 2062 idev->dev.parent = ictx->dev; 2063 input_set_drvdata(idev, ictx); 2064 2065 ret = input_register_device(idev); 2066 if (ret < 0) { 2067 dev_err(ictx->dev, "input dev register failed\n"); 2068 goto out; 2069 } 2070 2071 return idev; 2072 2073out: 2074 input_free_device(idev); 2075 return NULL; 2076} 2077 2078static struct input_dev *imon_init_touch(struct imon_context *ictx) 2079{ 2080 struct input_dev *touch; 2081 int ret; 2082 2083 touch = input_allocate_device(); 2084 if (!touch) 2085 goto touch_alloc_failed; 2086 2087 snprintf(ictx->name_touch, sizeof(ictx->name_touch), 2088 "iMON USB Touchscreen (%04x:%04x)", 2089 ictx->vendor, ictx->product); 2090 touch->name = ictx->name_touch; 2091 2092 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch, 2093 sizeof(ictx->phys_touch)); 2094 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch)); 2095 touch->phys = ictx->phys_touch; 2096 2097 touch->evbit[0] = 2098 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 2099 touch->keybit[BIT_WORD(BTN_TOUCH)] = 2100 BIT_MASK(BTN_TOUCH); 2101 input_set_abs_params(touch, ABS_X, 2102 0x00, 0xfff, 0, 0); 2103 input_set_abs_params(touch, ABS_Y, 2104 0x00, 0xfff, 0, 0); 2105 2106 input_set_drvdata(touch, ictx); 2107 2108 usb_to_input_id(ictx->usbdev_intf1, &touch->id); 2109 touch->dev.parent = ictx->dev; 2110 ret = input_register_device(touch); 2111 if (ret < 0) { 2112 dev_info(ictx->dev, "touchscreen input dev register failed\n"); 2113 goto touch_register_failed; 2114 } 2115 2116 return touch; 2117 2118touch_register_failed: 2119 input_free_device(touch); 2120 2121touch_alloc_failed: 2122 return NULL; 2123} 2124 2125static bool imon_find_endpoints(struct imon_context *ictx, 2126 struct usb_host_interface *iface_desc) 2127{ 2128 struct usb_endpoint_descriptor *ep; 2129 struct usb_endpoint_descriptor *rx_endpoint = NULL; 2130 struct usb_endpoint_descriptor *tx_endpoint = NULL; 2131 int ifnum = iface_desc->desc.bInterfaceNumber; 2132 int num_endpts = iface_desc->desc.bNumEndpoints; 2133 int i, ep_dir, ep_type; 2134 bool ir_ep_found = false; 2135 bool display_ep_found = false; 2136 bool tx_control = false; 2137 2138 /* 2139 * Scan the endpoint list and set: 2140 * first input endpoint = IR endpoint 2141 * first output endpoint = display endpoint 2142 */ 2143 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) { 2144 ep = &iface_desc->endpoint[i].desc; 2145 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; 2146 ep_type = usb_endpoint_type(ep); 2147 2148 if (!ir_ep_found && ep_dir == USB_DIR_IN && 2149 ep_type == USB_ENDPOINT_XFER_INT) { 2150 2151 rx_endpoint = ep; 2152 ir_ep_found = true; 2153 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__); 2154 2155 } else if (!display_ep_found && ep_dir == USB_DIR_OUT && 2156 ep_type == USB_ENDPOINT_XFER_INT) { 2157 tx_endpoint = ep; 2158 display_ep_found = true; 2159 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__); 2160 } 2161 } 2162 2163 if (ifnum == 0) { 2164 ictx->rx_endpoint_intf0 = rx_endpoint; 2165 /* 2166 * tx is used to send characters to lcd/vfd, associate RF 2167 * remotes, set IR protocol, and maybe more... 2168 */ 2169 ictx->tx_endpoint = tx_endpoint; 2170 } else { 2171 ictx->rx_endpoint_intf1 = rx_endpoint; 2172 } 2173 2174 /* 2175 * If we didn't find a display endpoint, this is probably one of the 2176 * newer iMON devices that use control urb instead of interrupt 2177 */ 2178 if (!display_ep_found) { 2179 tx_control = true; 2180 display_ep_found = true; 2181 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n", 2182 __func__); 2183 } 2184 2185 /* 2186 * Some iMON receivers have no display. Unfortunately, it seems 2187 * that SoundGraph recycles device IDs between devices both with 2188 * and without... :\ 2189 */ 2190 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) { 2191 display_ep_found = false; 2192 dev_dbg(ictx->dev, "%s: device has no display\n", __func__); 2193 } 2194 2195 /* 2196 * iMON Touch devices have a VGA touchscreen, but no "display", as 2197 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD). 2198 */ 2199 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2200 display_ep_found = false; 2201 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__); 2202 } 2203 2204 /* Input endpoint is mandatory */ 2205 if (!ir_ep_found) 2206 pr_err("no valid input (IR) endpoint found\n"); 2207 2208 ictx->tx_control = tx_control; 2209 2210 if (display_ep_found) 2211 ictx->display_supported = true; 2212 2213 return ir_ep_found; 2214 2215} 2216 2217static struct imon_context *imon_init_intf0(struct usb_interface *intf, 2218 const struct usb_device_id *id) 2219{ 2220 struct imon_context *ictx; 2221 struct urb *rx_urb; 2222 struct urb *tx_urb; 2223 struct device *dev = &intf->dev; 2224 struct usb_host_interface *iface_desc; 2225 int ret = -ENOMEM; 2226 2227 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL); 2228 if (!ictx) 2229 goto exit; 2230 2231 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2232 if (!rx_urb) 2233 goto rx_urb_alloc_failed; 2234 tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2235 if (!tx_urb) 2236 goto tx_urb_alloc_failed; 2237 2238 mutex_init(&ictx->lock); 2239 spin_lock_init(&ictx->kc_lock); 2240 2241 mutex_lock(&ictx->lock); 2242 2243 ictx->dev = dev; 2244 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf)); 2245 ictx->rx_urb_intf0 = rx_urb; 2246 ictx->tx_urb = tx_urb; 2247 ictx->rf_device = false; 2248 2249 init_completion(&ictx->tx.finished); 2250 2251 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor); 2252 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct); 2253 2254 /* save drive info for later accessing the panel/knob key table */ 2255 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info; 2256 /* default send_packet delay is 5ms but some devices need more */ 2257 ictx->send_packet_delay = ictx->dev_descr->flags & 2258 IMON_NEED_20MS_PKT_DELAY ? 20 : 5; 2259 2260 ret = -ENODEV; 2261 iface_desc = intf->cur_altsetting; 2262 if (!imon_find_endpoints(ictx, iface_desc)) { 2263 goto find_endpoint_failed; 2264 } 2265 2266 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2267 usb_rcvintpipe(ictx->usbdev_intf0, 2268 ictx->rx_endpoint_intf0->bEndpointAddress), 2269 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2270 usb_rx_callback_intf0, ictx, 2271 ictx->rx_endpoint_intf0->bInterval); 2272 2273 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL); 2274 if (ret) { 2275 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret); 2276 goto urb_submit_failed; 2277 } 2278 2279 ictx->idev = imon_init_idev(ictx); 2280 if (!ictx->idev) { 2281 dev_err(dev, "%s: input device setup failed\n", __func__); 2282 goto idev_setup_failed; 2283 } 2284 2285 ictx->rdev = imon_init_rdev(ictx); 2286 if (!ictx->rdev) { 2287 dev_err(dev, "%s: rc device setup failed\n", __func__); 2288 goto rdev_setup_failed; 2289 } 2290 2291 ictx->dev_present_intf0 = true; 2292 2293 mutex_unlock(&ictx->lock); 2294 return ictx; 2295 2296rdev_setup_failed: 2297 input_unregister_device(ictx->idev); 2298idev_setup_failed: 2299 usb_kill_urb(ictx->rx_urb_intf0); 2300urb_submit_failed: 2301find_endpoint_failed: 2302 usb_put_dev(ictx->usbdev_intf0); 2303 mutex_unlock(&ictx->lock); 2304 usb_free_urb(tx_urb); 2305tx_urb_alloc_failed: 2306 usb_free_urb(rx_urb); 2307rx_urb_alloc_failed: 2308 kfree(ictx); 2309exit: 2310 dev_err(dev, "unable to initialize intf0, err %d\n", ret); 2311 2312 return NULL; 2313} 2314 2315static struct imon_context *imon_init_intf1(struct usb_interface *intf, 2316 struct imon_context *ictx) 2317{ 2318 struct urb *rx_urb; 2319 struct usb_host_interface *iface_desc; 2320 int ret = -ENOMEM; 2321 2322 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2323 if (!rx_urb) 2324 goto rx_urb_alloc_failed; 2325 2326 mutex_lock(&ictx->lock); 2327 2328 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2329 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0); 2330 } 2331 2332 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf)); 2333 ictx->rx_urb_intf1 = rx_urb; 2334 2335 ret = -ENODEV; 2336 iface_desc = intf->cur_altsetting; 2337 if (!imon_find_endpoints(ictx, iface_desc)) 2338 goto find_endpoint_failed; 2339 2340 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2341 ictx->touch = imon_init_touch(ictx); 2342 if (!ictx->touch) 2343 goto touch_setup_failed; 2344 } else 2345 ictx->touch = NULL; 2346 2347 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2348 usb_rcvintpipe(ictx->usbdev_intf1, 2349 ictx->rx_endpoint_intf1->bEndpointAddress), 2350 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2351 usb_rx_callback_intf1, ictx, 2352 ictx->rx_endpoint_intf1->bInterval); 2353 2354 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL); 2355 2356 if (ret) { 2357 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret); 2358 goto urb_submit_failed; 2359 } 2360 2361 ictx->dev_present_intf1 = true; 2362 2363 mutex_unlock(&ictx->lock); 2364 return ictx; 2365 2366urb_submit_failed: 2367 if (ictx->touch) 2368 input_unregister_device(ictx->touch); 2369touch_setup_failed: 2370find_endpoint_failed: 2371 usb_put_dev(ictx->usbdev_intf1); 2372 mutex_unlock(&ictx->lock); 2373 usb_free_urb(rx_urb); 2374rx_urb_alloc_failed: 2375 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret); 2376 2377 return NULL; 2378} 2379 2380static void imon_init_display(struct imon_context *ictx, 2381 struct usb_interface *intf) 2382{ 2383 int ret; 2384 2385 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n"); 2386 2387 /* set up sysfs entry for built-in clock */ 2388 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group); 2389 if (ret) 2390 dev_err(ictx->dev, "Could not create display sysfs entries(%d)", 2391 ret); 2392 2393 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2394 ret = usb_register_dev(intf, &imon_lcd_class); 2395 else 2396 ret = usb_register_dev(intf, &imon_vfd_class); 2397 if (ret) 2398 /* Not a fatal error, so ignore */ 2399 dev_info(ictx->dev, "could not get a minor number for display\n"); 2400 2401} 2402 2403/* 2404 * Callback function for USB core API: Probe 2405 */ 2406static int imon_probe(struct usb_interface *interface, 2407 const struct usb_device_id *id) 2408{ 2409 struct usb_device *usbdev = NULL; 2410 struct usb_host_interface *iface_desc = NULL; 2411 struct usb_interface *first_if; 2412 struct device *dev = &interface->dev; 2413 int ifnum, sysfs_err; 2414 int ret = 0; 2415 struct imon_context *ictx = NULL; 2416 u16 vendor, product; 2417 2418 usbdev = usb_get_dev(interface_to_usbdev(interface)); 2419 iface_desc = interface->cur_altsetting; 2420 ifnum = iface_desc->desc.bInterfaceNumber; 2421 vendor = le16_to_cpu(usbdev->descriptor.idVendor); 2422 product = le16_to_cpu(usbdev->descriptor.idProduct); 2423 2424 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n", 2425 __func__, vendor, product, ifnum); 2426 2427 first_if = usb_ifnum_to_if(usbdev, 0); 2428 if (!first_if) { 2429 ret = -ENODEV; 2430 goto fail; 2431 } 2432 2433 if (first_if->dev.driver != interface->dev.driver) { 2434 dev_err(&interface->dev, "inconsistent driver matching\n"); 2435 ret = -EINVAL; 2436 goto fail; 2437 } 2438 2439 if (ifnum == 0) { 2440 ictx = imon_init_intf0(interface, id); 2441 if (!ictx) { 2442 pr_err("failed to initialize context!\n"); 2443 ret = -ENODEV; 2444 goto fail; 2445 } 2446 refcount_set(&ictx->users, 1); 2447 2448 } else { 2449 /* this is the secondary interface on the device */ 2450 struct imon_context *first_if_ctx = usb_get_intfdata(first_if); 2451 2452 /* fail early if first intf failed to register */ 2453 if (!first_if_ctx) { 2454 ret = -ENODEV; 2455 goto fail; 2456 } 2457 2458 ictx = imon_init_intf1(interface, first_if_ctx); 2459 if (!ictx) { 2460 pr_err("failed to attach to context!\n"); 2461 ret = -ENODEV; 2462 goto fail; 2463 } 2464 refcount_inc(&ictx->users); 2465 2466 } 2467 2468 usb_set_intfdata(interface, ictx); 2469 2470 if (ifnum == 0) { 2471 if (product == 0xffdc && ictx->rf_device) { 2472 sysfs_err = sysfs_create_group(&interface->dev.kobj, 2473 &imon_rf_attr_group); 2474 if (sysfs_err) 2475 pr_err("Could not create RF sysfs entries(%d)\n", 2476 sysfs_err); 2477 } 2478 2479 if (ictx->display_supported) 2480 imon_init_display(ictx, interface); 2481 } 2482 2483 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n", 2484 vendor, product, ifnum, 2485 usbdev->bus->busnum, usbdev->devnum); 2486 2487 usb_put_dev(usbdev); 2488 2489 return 0; 2490 2491fail: 2492 usb_put_dev(usbdev); 2493 dev_err(dev, "unable to register, err %d\n", ret); 2494 2495 return ret; 2496} 2497 2498/* 2499 * Callback function for USB core API: disconnect 2500 */ 2501static void imon_disconnect(struct usb_interface *interface) 2502{ 2503 struct imon_context *ictx; 2504 struct device *dev; 2505 int ifnum; 2506 2507 ictx = usb_get_intfdata(interface); 2508 ictx->disconnected = true; 2509 dev = ictx->dev; 2510 ifnum = interface->cur_altsetting->desc.bInterfaceNumber; 2511 2512 /* 2513 * sysfs_remove_group is safe to call even if sysfs_create_group 2514 * hasn't been called 2515 */ 2516 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group); 2517 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group); 2518 2519 usb_set_intfdata(interface, NULL); 2520 2521 /* Abort ongoing write */ 2522 if (ictx->tx.busy) { 2523 usb_kill_urb(ictx->tx_urb); 2524 complete(&ictx->tx.finished); 2525 } 2526 2527 if (ifnum == 0) { 2528 ictx->dev_present_intf0 = false; 2529 usb_kill_urb(ictx->rx_urb_intf0); 2530 usb_put_dev(ictx->usbdev_intf0); 2531 input_unregister_device(ictx->idev); 2532 rc_unregister_device(ictx->rdev); 2533 if (ictx->display_supported) { 2534 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2535 usb_deregister_dev(interface, &imon_lcd_class); 2536 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD) 2537 usb_deregister_dev(interface, &imon_vfd_class); 2538 } 2539 } else { 2540 ictx->dev_present_intf1 = false; 2541 usb_kill_urb(ictx->rx_urb_intf1); 2542 usb_put_dev(ictx->usbdev_intf1); 2543 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2544 input_unregister_device(ictx->touch); 2545 del_timer_sync(&ictx->ttimer); 2546 } 2547 } 2548 2549 if (refcount_dec_and_test(&ictx->users)) 2550 free_imon_context(ictx); 2551 2552 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n", 2553 __func__, ifnum); 2554} 2555 2556static int imon_suspend(struct usb_interface *intf, pm_message_t message) 2557{ 2558 struct imon_context *ictx = usb_get_intfdata(intf); 2559 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2560 2561 if (ifnum == 0) 2562 usb_kill_urb(ictx->rx_urb_intf0); 2563 else 2564 usb_kill_urb(ictx->rx_urb_intf1); 2565 2566 return 0; 2567} 2568 2569static int imon_resume(struct usb_interface *intf) 2570{ 2571 int rc = 0; 2572 struct imon_context *ictx = usb_get_intfdata(intf); 2573 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2574 2575 if (ifnum == 0) { 2576 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2577 usb_rcvintpipe(ictx->usbdev_intf0, 2578 ictx->rx_endpoint_intf0->bEndpointAddress), 2579 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2580 usb_rx_callback_intf0, ictx, 2581 ictx->rx_endpoint_intf0->bInterval); 2582 2583 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 2584 2585 } else { 2586 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2587 usb_rcvintpipe(ictx->usbdev_intf1, 2588 ictx->rx_endpoint_intf1->bEndpointAddress), 2589 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2590 usb_rx_callback_intf1, ictx, 2591 ictx->rx_endpoint_intf1->bInterval); 2592 2593 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 2594 } 2595 2596 return rc; 2597} 2598 2599module_usb_driver(imon_driver); 2600