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imon.c
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linux-6.19.14/drivers/media/rc/imon.c
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 IMON_CLOCK_ENABLE_PACKETS 2 43 44/*** P R O T O T Y P E S ***/ 45 46/* USB Callback prototypes */ 47static int imon_probe(struct usb_interface *interface, 48 const struct usb_device_id *id); 49static void imon_disconnect(struct usb_interface *interface); 50static void usb_rx_callback_intf0(struct urb *urb); 51static void usb_rx_callback_intf1(struct urb *urb); 52static void usb_tx_callback(struct urb *urb); 53 54/* suspend/resume support */ 55static int imon_resume(struct usb_interface *intf); 56static int imon_suspend(struct usb_interface *intf, pm_message_t message); 57 58/* Display file_operations function prototypes */ 59static int display_open(struct inode *inode, struct file *file); 60static int display_close(struct inode *inode, struct file *file); 61 62/* VFD write operation */ 63static ssize_t vfd_write(struct file *file, const char __user *buf, 64 size_t n_bytes, loff_t *pos); 65 66/* LCD file_operations override function prototypes */ 67static ssize_t lcd_write(struct file *file, const char __user *buf, 68 size_t n_bytes, loff_t *pos); 69 70/*** G L O B A L S ***/ 71 72struct imon_panel_key_table { 73 u64 hw_code; 74 u32 keycode; 75}; 76 77struct imon_usb_dev_descr { 78 __u16 flags; 79#define IMON_NO_FLAGS 0 80#define IMON_NEED_20MS_PKT_DELAY 1 81#define IMON_SUPPRESS_REPEATED_KEYS 2 82 struct imon_panel_key_table key_table[]; 83}; 84 85struct imon_context { 86 struct device *dev; 87 /* Newer devices have two interfaces */ 88 struct usb_device *usbdev_intf0; 89 struct usb_device *usbdev_intf1; 90 91 bool display_supported; /* not all controllers do */ 92 bool display_isopen; /* display port has been opened */ 93 bool rf_device; /* true if iMON 2.4G LT/DT RF device */ 94 bool rf_isassociating; /* RF remote associating */ 95 bool dev_present_intf0; /* USB device presence, interface 0 */ 96 bool dev_present_intf1; /* USB device presence, interface 1 */ 97 98 struct mutex lock; /* to lock this object */ 99 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */ 100 101 struct usb_endpoint_descriptor *rx_endpoint_intf0; 102 struct usb_endpoint_descriptor *rx_endpoint_intf1; 103 struct usb_endpoint_descriptor *tx_endpoint; 104 struct urb *rx_urb_intf0; 105 struct urb *rx_urb_intf1; 106 struct urb *tx_urb; 107 bool tx_control; 108 unsigned char usb_rx_buf[8]; 109 unsigned char usb_tx_buf[8]; 110 unsigned int send_packet_delay; 111 112 struct tx_t { 113 unsigned char data_buf[35]; /* user data buffer */ 114 struct completion finished; /* wait for write to finish */ 115 bool busy; /* write in progress */ 116 int status; /* status of tx completion */ 117 } tx; 118 119 u16 vendor; /* usb vendor ID */ 120 u16 product; /* usb product ID */ 121 122 struct rc_dev *rdev; /* rc-core device for remote */ 123 struct input_dev *idev; /* input device for panel & IR mouse */ 124 struct input_dev *touch; /* input device for touchscreen */ 125 126 spinlock_t kc_lock; /* make sure we get keycodes right */ 127 u32 kc; /* current input keycode */ 128 u32 last_keycode; /* last reported input keycode */ 129 u32 rc_scancode; /* the computed remote scancode */ 130 u8 rc_toggle; /* the computed remote toggle bit */ 131 u64 rc_proto; /* iMON or MCE (RC6) IR protocol? */ 132 bool release_code; /* some keys send a release code */ 133 134 u8 display_type; /* store the display type */ 135 bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */ 136 137 char name_rdev[128]; /* rc input device name */ 138 char phys_rdev[64]; /* rc input device phys path */ 139 140 char name_idev[128]; /* input device name */ 141 char phys_idev[64]; /* input device phys path */ 142 143 char name_touch[128]; /* touch screen name */ 144 char phys_touch[64]; /* touch screen phys path */ 145 struct timer_list ttimer; /* touch screen timer */ 146 int touch_x; /* x coordinate on touchscreen */ 147 int touch_y; /* y coordinate on touchscreen */ 148 const struct imon_usb_dev_descr *dev_descr; 149 /* device description with key */ 150 /* table for front panels */ 151 /* 152 * Fields for deferring free_imon_context(). 153 * 154 * Since reference to "struct imon_context" is stored into 155 * "struct file"->private_data, we need to remember 156 * how many file descriptors might access this "struct imon_context". 157 */ 158 refcount_t users; 159 /* 160 * Use a flag for telling display_open()/vfd_write()/lcd_write() that 161 * imon_disconnect() was already called. 162 */ 163 bool disconnected; 164 /* 165 * We need to wait for RCU grace period in order to allow 166 * display_open() to safely check ->disconnected and increment ->users. 167 */ 168 struct rcu_head rcu; 169}; 170 171#define TOUCH_TIMEOUT (HZ/30) 172 173/* vfd character device file operations */ 174static const struct file_operations vfd_fops = { 175 .owner = THIS_MODULE, 176 .open = display_open, 177 .write = vfd_write, 178 .release = display_close, 179 .llseek = noop_llseek, 180}; 181 182/* lcd character device file operations */ 183static const struct file_operations lcd_fops = { 184 .owner = THIS_MODULE, 185 .open = display_open, 186 .write = lcd_write, 187 .release = display_close, 188 .llseek = noop_llseek, 189}; 190 191enum { 192 IMON_DISPLAY_TYPE_AUTO = 0, 193 IMON_DISPLAY_TYPE_VFD = 1, 194 IMON_DISPLAY_TYPE_LCD = 2, 195 IMON_DISPLAY_TYPE_VGA = 3, 196 IMON_DISPLAY_TYPE_NONE = 4, 197}; 198 199enum { 200 IMON_KEY_IMON = 0, 201 IMON_KEY_MCE = 1, 202 IMON_KEY_PANEL = 2, 203}; 204 205static struct usb_class_driver imon_vfd_class = { 206 .name = DEVICE_NAME, 207 .fops = &vfd_fops, 208 .minor_base = DISPLAY_MINOR_BASE, 209}; 210 211static struct usb_class_driver imon_lcd_class = { 212 .name = DEVICE_NAME, 213 .fops = &lcd_fops, 214 .minor_base = DISPLAY_MINOR_BASE, 215}; 216 217/* imon receiver front panel/knob key table */ 218static const struct imon_usb_dev_descr imon_default_table = { 219 .flags = IMON_NO_FLAGS, 220 .key_table = { 221 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 222 { 0x000000001200ffeell, KEY_UP }, 223 { 0x000000001300ffeell, KEY_DOWN }, 224 { 0x000000001400ffeell, KEY_LEFT }, 225 { 0x000000001500ffeell, KEY_RIGHT }, 226 { 0x000000001600ffeell, KEY_ENTER }, 227 { 0x000000001700ffeell, KEY_ESC }, 228 { 0x000000001f00ffeell, KEY_AUDIO }, 229 { 0x000000002000ffeell, KEY_VIDEO }, 230 { 0x000000002100ffeell, KEY_CAMERA }, 231 { 0x000000002700ffeell, KEY_DVD }, 232 { 0x000000002300ffeell, KEY_TV }, 233 { 0x000000002b00ffeell, KEY_EXIT }, 234 { 0x000000002c00ffeell, KEY_SELECT }, 235 { 0x000000002d00ffeell, KEY_MENU }, 236 { 0x000000000500ffeell, KEY_PREVIOUS }, 237 { 0x000000000700ffeell, KEY_REWIND }, 238 { 0x000000000400ffeell, KEY_STOP }, 239 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 240 { 0x000000000800ffeell, KEY_FASTFORWARD }, 241 { 0x000000000600ffeell, KEY_NEXT }, 242 { 0x000000010000ffeell, KEY_RIGHT }, 243 { 0x000001000000ffeell, KEY_LEFT }, 244 { 0x000000003d00ffeell, KEY_SELECT }, 245 { 0x000100000000ffeell, KEY_VOLUMEUP }, 246 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 247 { 0x000000000100ffeell, KEY_MUTE }, 248 /* 0xffdc iMON MCE VFD */ 249 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 250 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 251 { 0x00000001ffffffeell, KEY_MUTE }, 252 { 0x0000000fffffffeell, KEY_MEDIA }, 253 { 0x00000012ffffffeell, KEY_UP }, 254 { 0x00000013ffffffeell, KEY_DOWN }, 255 { 0x00000014ffffffeell, KEY_LEFT }, 256 { 0x00000015ffffffeell, KEY_RIGHT }, 257 { 0x00000016ffffffeell, KEY_ENTER }, 258 { 0x00000017ffffffeell, KEY_ESC }, 259 /* iMON Knob values */ 260 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 261 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 262 { 0x000008ffffffffeell, KEY_MUTE }, 263 { 0, KEY_RESERVED }, 264 } 265}; 266 267static const struct imon_usb_dev_descr imon_OEM_VFD = { 268 .flags = IMON_NEED_20MS_PKT_DELAY, 269 .key_table = { 270 { 0x000000000f00ffeell, KEY_MEDIA }, /* Go */ 271 { 0x000000001200ffeell, KEY_UP }, 272 { 0x000000001300ffeell, KEY_DOWN }, 273 { 0x000000001400ffeell, KEY_LEFT }, 274 { 0x000000001500ffeell, KEY_RIGHT }, 275 { 0x000000001600ffeell, KEY_ENTER }, 276 { 0x000000001700ffeell, KEY_ESC }, 277 { 0x000000001f00ffeell, KEY_AUDIO }, 278 { 0x000000002b00ffeell, KEY_EXIT }, 279 { 0x000000002c00ffeell, KEY_SELECT }, 280 { 0x000000002d00ffeell, KEY_MENU }, 281 { 0x000000000500ffeell, KEY_PREVIOUS }, 282 { 0x000000000700ffeell, KEY_REWIND }, 283 { 0x000000000400ffeell, KEY_STOP }, 284 { 0x000000003c00ffeell, KEY_PLAYPAUSE }, 285 { 0x000000000800ffeell, KEY_FASTFORWARD }, 286 { 0x000000000600ffeell, KEY_NEXT }, 287 { 0x000000010000ffeell, KEY_RIGHT }, 288 { 0x000001000000ffeell, KEY_LEFT }, 289 { 0x000000003d00ffeell, KEY_SELECT }, 290 { 0x000100000000ffeell, KEY_VOLUMEUP }, 291 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 292 { 0x000000000100ffeell, KEY_MUTE }, 293 /* 0xffdc iMON MCE VFD */ 294 { 0x00010000ffffffeell, KEY_VOLUMEUP }, 295 { 0x01000000ffffffeell, KEY_VOLUMEDOWN }, 296 { 0x00000001ffffffeell, KEY_MUTE }, 297 { 0x0000000fffffffeell, KEY_MEDIA }, 298 { 0x00000012ffffffeell, KEY_UP }, 299 { 0x00000013ffffffeell, KEY_DOWN }, 300 { 0x00000014ffffffeell, KEY_LEFT }, 301 { 0x00000015ffffffeell, KEY_RIGHT }, 302 { 0x00000016ffffffeell, KEY_ENTER }, 303 { 0x00000017ffffffeell, KEY_ESC }, 304 /* iMON Knob values */ 305 { 0x000100ffffffffeell, KEY_VOLUMEUP }, 306 { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, 307 { 0x000008ffffffffeell, KEY_MUTE }, 308 { 0, KEY_RESERVED }, 309 } 310}; 311 312/* imon receiver front panel/knob key table for DH102*/ 313static const struct imon_usb_dev_descr imon_DH102 = { 314 .flags = IMON_NO_FLAGS, 315 .key_table = { 316 { 0x000100000000ffeell, KEY_VOLUMEUP }, 317 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 318 { 0x000000010000ffeell, KEY_MUTE }, 319 { 0x0000000f0000ffeell, KEY_MEDIA }, 320 { 0x000000120000ffeell, KEY_UP }, 321 { 0x000000130000ffeell, KEY_DOWN }, 322 { 0x000000140000ffeell, KEY_LEFT }, 323 { 0x000000150000ffeell, KEY_RIGHT }, 324 { 0x000000160000ffeell, KEY_ENTER }, 325 { 0x000000170000ffeell, KEY_ESC }, 326 { 0x0000002b0000ffeell, KEY_EXIT }, 327 { 0x0000002c0000ffeell, KEY_SELECT }, 328 { 0x0000002d0000ffeell, KEY_MENU }, 329 { 0, KEY_RESERVED } 330 } 331}; 332 333/* imon ultrabay front panel key table */ 334static const struct imon_usb_dev_descr ultrabay_table = { 335 .flags = IMON_SUPPRESS_REPEATED_KEYS, 336 .key_table = { 337 { 0x0000000f0000ffeell, KEY_MEDIA }, /* Go */ 338 { 0x000000000100ffeell, KEY_UP }, 339 { 0x000000000001ffeell, KEY_DOWN }, 340 { 0x000000160000ffeell, KEY_ENTER }, 341 { 0x0000001f0000ffeell, KEY_AUDIO }, /* Music */ 342 { 0x000000200000ffeell, KEY_VIDEO }, /* Movie */ 343 { 0x000000210000ffeell, KEY_CAMERA }, /* Photo */ 344 { 0x000000270000ffeell, KEY_DVD }, /* DVD */ 345 { 0x000000230000ffeell, KEY_TV }, /* TV */ 346 { 0x000000050000ffeell, KEY_PREVIOUS }, /* Previous */ 347 { 0x000000070000ffeell, KEY_REWIND }, 348 { 0x000000040000ffeell, KEY_STOP }, 349 { 0x000000020000ffeell, KEY_PLAYPAUSE }, 350 { 0x000000080000ffeell, KEY_FASTFORWARD }, 351 { 0x000000060000ffeell, KEY_NEXT }, /* Next */ 352 { 0x000100000000ffeell, KEY_VOLUMEUP }, 353 { 0x010000000000ffeell, KEY_VOLUMEDOWN }, 354 { 0x000000010000ffeell, KEY_MUTE }, 355 { 0, KEY_RESERVED }, 356 } 357}; 358 359/* 360 * USB Device ID for iMON USB Control Boards 361 * 362 * The Windows drivers contain 6 different inf files, more or less one for 363 * each new device until the 0x0034-0x0046 devices, which all use the same 364 * driver. Some of the devices in the 34-46 range haven't been definitively 365 * identified yet. Early devices have either a TriGem Computer, Inc. or a 366 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later 367 * devices use the SoundGraph vendor ID (0x15c2). This driver only supports 368 * the ffdc and later devices, which do onboard decoding. 369 */ 370static const struct usb_device_id imon_usb_id_table[] = { 371 /* 372 * Several devices with this same device ID, all use iMON_PAD.inf 373 * SoundGraph iMON PAD (IR & VFD) 374 * SoundGraph iMON PAD (IR & LCD) 375 * SoundGraph iMON Knob (IR only) 376 */ 377 { USB_DEVICE(0x15c2, 0xffdc), 378 .driver_info = (unsigned long)&imon_default_table }, 379 380 /* 381 * Newer devices, all driven by the latest iMON Windows driver, full 382 * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2' 383 * Need user input to fill in details on unknown devices. 384 */ 385 /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */ 386 { USB_DEVICE(0x15c2, 0x0034), 387 .driver_info = (unsigned long)&imon_DH102 }, 388 /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */ 389 { USB_DEVICE(0x15c2, 0x0035), 390 .driver_info = (unsigned long)&imon_default_table}, 391 /* SoundGraph iMON OEM VFD (IR & VFD) */ 392 { USB_DEVICE(0x15c2, 0x0036), 393 .driver_info = (unsigned long)&imon_OEM_VFD }, 394 /* device specifics unknown */ 395 { USB_DEVICE(0x15c2, 0x0037), 396 .driver_info = (unsigned long)&imon_default_table}, 397 /* SoundGraph iMON OEM LCD (IR & LCD) */ 398 { USB_DEVICE(0x15c2, 0x0038), 399 .driver_info = (unsigned long)&imon_default_table}, 400 /* SoundGraph iMON UltraBay (IR & LCD) */ 401 { USB_DEVICE(0x15c2, 0x0039), 402 .driver_info = (unsigned long)&imon_default_table}, 403 /* device specifics unknown */ 404 { USB_DEVICE(0x15c2, 0x003a), 405 .driver_info = (unsigned long)&imon_default_table}, 406 /* device specifics unknown */ 407 { USB_DEVICE(0x15c2, 0x003b), 408 .driver_info = (unsigned long)&imon_default_table}, 409 /* SoundGraph iMON OEM Inside (IR only) */ 410 { USB_DEVICE(0x15c2, 0x003c), 411 .driver_info = (unsigned long)&imon_default_table}, 412 /* device specifics unknown */ 413 { USB_DEVICE(0x15c2, 0x003d), 414 .driver_info = (unsigned long)&imon_default_table}, 415 /* device specifics unknown */ 416 { USB_DEVICE(0x15c2, 0x003e), 417 .driver_info = (unsigned long)&imon_default_table}, 418 /* device specifics unknown */ 419 { USB_DEVICE(0x15c2, 0x003f), 420 .driver_info = (unsigned long)&imon_default_table}, 421 /* device specifics unknown */ 422 { USB_DEVICE(0x15c2, 0x0040), 423 .driver_info = (unsigned long)&imon_default_table}, 424 /* SoundGraph iMON MINI (IR only) */ 425 { USB_DEVICE(0x15c2, 0x0041), 426 .driver_info = (unsigned long)&imon_default_table}, 427 /* Antec Veris Multimedia Station EZ External (IR only) */ 428 { USB_DEVICE(0x15c2, 0x0042), 429 .driver_info = (unsigned long)&imon_default_table}, 430 /* Antec Veris Multimedia Station Basic Internal (IR only) */ 431 { USB_DEVICE(0x15c2, 0x0043), 432 .driver_info = (unsigned long)&imon_default_table}, 433 /* Antec Veris Multimedia Station Elite (IR & VFD) */ 434 { USB_DEVICE(0x15c2, 0x0044), 435 .driver_info = (unsigned long)&imon_default_table}, 436 /* Antec Veris Multimedia Station Premiere (IR & LCD) */ 437 { USB_DEVICE(0x15c2, 0x0045), 438 .driver_info = (unsigned long)&imon_default_table}, 439 /* device specifics unknown */ 440 { USB_DEVICE(0x15c2, 0x0046), 441 .driver_info = (unsigned long)&imon_default_table}, 442 {} 443}; 444 445/* USB Device data */ 446static struct usb_driver imon_driver = { 447 .name = MOD_NAME, 448 .probe = imon_probe, 449 .disconnect = imon_disconnect, 450 .suspend = imon_suspend, 451 .resume = imon_resume, 452 .id_table = imon_usb_id_table, 453}; 454 455/* Module bookkeeping bits */ 456MODULE_AUTHOR(MOD_AUTHOR); 457MODULE_DESCRIPTION(MOD_DESC); 458MODULE_VERSION(MOD_VERSION); 459MODULE_LICENSE("GPL"); 460MODULE_DEVICE_TABLE(usb, imon_usb_id_table); 461 462static bool debug; 463module_param(debug, bool, S_IRUGO | S_IWUSR); 464MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)"); 465 466/* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */ 467static int display_type; 468module_param(display_type, int, S_IRUGO); 469MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, 1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)"); 470 471static int pad_stabilize = 1; 472module_param(pad_stabilize, int, S_IRUGO | S_IWUSR); 473MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD presses in arrow key mode. 0=disable, 1=enable (default)."); 474 475/* 476 * In certain use cases, mouse mode isn't really helpful, and could actually 477 * cause confusion, so allow disabling it when the IR device is open. 478 */ 479static bool nomouse; 480module_param(nomouse, bool, S_IRUGO | S_IWUSR); 481MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is open. 0=don't disable, 1=disable. (default: don't disable)"); 482 483/* threshold at which a pad push registers as an arrow key in kbd mode */ 484static int pad_thresh; 485module_param(pad_thresh, int, S_IRUGO | S_IWUSR); 486MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an arrow key in kbd mode (default: 28)"); 487 488 489static void free_imon_context(struct imon_context *ictx) 490{ 491 struct device *dev = ictx->dev; 492 493 usb_free_urb(ictx->tx_urb); 494 WARN_ON(ictx->dev_present_intf0); 495 usb_free_urb(ictx->rx_urb_intf0); 496 WARN_ON(ictx->dev_present_intf1); 497 usb_free_urb(ictx->rx_urb_intf1); 498 kfree_rcu(ictx, rcu); 499 500 dev_dbg(dev, "%s: iMON context freed\n", __func__); 501} 502 503/* 504 * Called when the Display device (e.g. /dev/lcd0) 505 * is opened by the application. 506 */ 507static int display_open(struct inode *inode, struct file *file) 508{ 509 struct usb_interface *interface; 510 struct imon_context *ictx = NULL; 511 int subminor; 512 int retval = 0; 513 514 subminor = iminor(inode); 515 interface = usb_find_interface(&imon_driver, subminor); 516 if (!interface) { 517 pr_err("could not find interface for minor %d\n", subminor); 518 retval = -ENODEV; 519 goto exit; 520 } 521 522 rcu_read_lock(); 523 ictx = usb_get_intfdata(interface); 524 if (!ictx || ictx->disconnected || !refcount_inc_not_zero(&ictx->users)) { 525 rcu_read_unlock(); 526 pr_err("no context found for minor %d\n", subminor); 527 retval = -ENODEV; 528 goto exit; 529 } 530 rcu_read_unlock(); 531 532 mutex_lock(&ictx->lock); 533 534 if (ictx->disconnected) { 535 retval = -ENODEV; 536 } else if (!ictx->display_supported) { 537 pr_err("display not supported by device\n"); 538 retval = -ENODEV; 539 } else if (ictx->display_isopen) { 540 pr_err("display port is already open\n"); 541 retval = -EBUSY; 542 } else { 543 ictx->display_isopen = true; 544 file->private_data = ictx; 545 dev_dbg(ictx->dev, "display port opened\n"); 546 } 547 548 mutex_unlock(&ictx->lock); 549 550 if (retval && refcount_dec_and_test(&ictx->users)) 551 free_imon_context(ictx); 552 553exit: 554 return retval; 555} 556 557/* 558 * Called when the display device (e.g. /dev/lcd0) 559 * is closed by the application. 560 */ 561static int display_close(struct inode *inode, struct file *file) 562{ 563 struct imon_context *ictx = file->private_data; 564 int retval = 0; 565 566 mutex_lock(&ictx->lock); 567 568 if (!ictx->display_supported) { 569 pr_err("display not supported by device\n"); 570 retval = -ENODEV; 571 } else if (!ictx->display_isopen) { 572 pr_err("display is not open\n"); 573 retval = -EIO; 574 } else { 575 ictx->display_isopen = false; 576 dev_dbg(ictx->dev, "display port closed\n"); 577 } 578 579 mutex_unlock(&ictx->lock); 580 if (refcount_dec_and_test(&ictx->users)) 581 free_imon_context(ictx); 582 return retval; 583} 584 585/* 586 * Sends a packet to the device -- this function must be called with 587 * ictx->lock held, or its unlock/lock sequence while waiting for tx 588 * to complete can/will lead to a deadlock. 589 */ 590static int send_packet(struct imon_context *ictx) 591{ 592 unsigned int pipe; 593 unsigned long timeout; 594 int interval = 0; 595 int retval = 0; 596 struct usb_ctrlrequest *control_req = NULL; 597 598 lockdep_assert_held(&ictx->lock); 599 600 if (ictx->disconnected) 601 return -ENODEV; 602 603 /* Check if we need to use control or interrupt urb */ 604 if (!ictx->tx_control) { 605 pipe = usb_sndintpipe(ictx->usbdev_intf0, 606 ictx->tx_endpoint->bEndpointAddress); 607 interval = ictx->tx_endpoint->bInterval; 608 609 usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe, 610 ictx->usb_tx_buf, 611 sizeof(ictx->usb_tx_buf), 612 usb_tx_callback, ictx, interval); 613 614 ictx->tx_urb->actual_length = 0; 615 } else { 616 /* fill request into kmalloc'ed space: */ 617 control_req = kmalloc(sizeof(*control_req), GFP_KERNEL); 618 if (control_req == NULL) 619 return -ENOMEM; 620 621 /* setup packet is '21 09 0200 0001 0008' */ 622 control_req->bRequestType = 0x21; 623 control_req->bRequest = 0x09; 624 control_req->wValue = cpu_to_le16(0x0200); 625 control_req->wIndex = cpu_to_le16(0x0001); 626 control_req->wLength = cpu_to_le16(0x0008); 627 628 /* control pipe is endpoint 0x00 */ 629 pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0); 630 631 /* build the control urb */ 632 usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0, 633 pipe, (unsigned char *)control_req, 634 ictx->usb_tx_buf, 635 sizeof(ictx->usb_tx_buf), 636 usb_tx_callback, ictx); 637 ictx->tx_urb->actual_length = 0; 638 } 639 640 reinit_completion(&ictx->tx.finished); 641 ictx->tx.busy = true; 642 smp_rmb(); /* ensure later readers know we're busy */ 643 644 retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL); 645 if (retval) { 646 ictx->tx.busy = false; 647 smp_rmb(); /* ensure later readers know we're not busy */ 648 pr_err_ratelimited("error submitting urb(%d)\n", retval); 649 } else { 650 /* Wait for transmission to complete (or abort or timeout) */ 651 retval = wait_for_completion_interruptible_timeout(&ictx->tx.finished, 10 * HZ); 652 if (retval <= 0) { 653 usb_kill_urb(ictx->tx_urb); 654 pr_err_ratelimited("task interrupted\n"); 655 if (retval < 0) 656 ictx->tx.status = retval; 657 else 658 ictx->tx.status = -ETIMEDOUT; 659 } 660 661 ictx->tx.busy = false; 662 retval = ictx->tx.status; 663 if (retval) 664 pr_err_ratelimited("packet tx failed (%d)\n", retval); 665 } 666 667 kfree(control_req); 668 669 /* 670 * Induce a mandatory delay before returning, as otherwise, 671 * send_packet can get called so rapidly as to overwhelm the device, 672 * particularly on faster systems and/or those with quirky usb. 673 */ 674 timeout = msecs_to_jiffies(ictx->send_packet_delay); 675 set_current_state(TASK_INTERRUPTIBLE); 676 schedule_timeout(timeout); 677 678 return retval; 679} 680 681/* 682 * Sends an associate packet to the iMON 2.4G. 683 * 684 * This might not be such a good idea, since it has an id collision with 685 * some versions of the "IR & VFD" combo. The only way to determine if it 686 * is an RF version is to look at the product description string. (Which 687 * we currently do not fetch). 688 */ 689static int send_associate_24g(struct imon_context *ictx) 690{ 691 const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00, 692 0x00, 0x00, 0x00, 0x20 }; 693 694 if (!ictx) { 695 pr_err("no context for device\n"); 696 return -ENODEV; 697 } 698 699 if (!ictx->dev_present_intf0) { 700 pr_err("no iMON device present\n"); 701 return -ENODEV; 702 } 703 704 memcpy(ictx->usb_tx_buf, packet, sizeof(packet)); 705 706 return send_packet(ictx); 707} 708 709/* 710 * Sends packets to setup and show clock on iMON display 711 * 712 * Arguments: year - last 2 digits of year, month - 1..12, 713 * day - 1..31, dow - day of the week (0-Sun...6-Sat), 714 * hour - 0..23, minute - 0..59, second - 0..59 715 */ 716static int send_set_imon_clock(struct imon_context *ictx, 717 unsigned int year, unsigned int month, 718 unsigned int day, unsigned int dow, 719 unsigned int hour, unsigned int minute, 720 unsigned int second) 721{ 722 unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8]; 723 int retval = 0; 724 int i; 725 726 if (!ictx) { 727 pr_err("no context for device\n"); 728 return -ENODEV; 729 } 730 731 switch (ictx->display_type) { 732 case IMON_DISPLAY_TYPE_LCD: 733 clock_enable_pkt[0][0] = 0x80; 734 clock_enable_pkt[0][1] = year; 735 clock_enable_pkt[0][2] = month-1; 736 clock_enable_pkt[0][3] = day; 737 clock_enable_pkt[0][4] = hour; 738 clock_enable_pkt[0][5] = minute; 739 clock_enable_pkt[0][6] = second; 740 741 clock_enable_pkt[1][0] = 0x80; 742 clock_enable_pkt[1][1] = 0; 743 clock_enable_pkt[1][2] = 0; 744 clock_enable_pkt[1][3] = 0; 745 clock_enable_pkt[1][4] = 0; 746 clock_enable_pkt[1][5] = 0; 747 clock_enable_pkt[1][6] = 0; 748 749 if (ictx->product == 0xffdc) { 750 clock_enable_pkt[0][7] = 0x50; 751 clock_enable_pkt[1][7] = 0x51; 752 } else { 753 clock_enable_pkt[0][7] = 0x88; 754 clock_enable_pkt[1][7] = 0x8a; 755 } 756 757 break; 758 759 case IMON_DISPLAY_TYPE_VFD: 760 clock_enable_pkt[0][0] = year; 761 clock_enable_pkt[0][1] = month-1; 762 clock_enable_pkt[0][2] = day; 763 clock_enable_pkt[0][3] = dow; 764 clock_enable_pkt[0][4] = hour; 765 clock_enable_pkt[0][5] = minute; 766 clock_enable_pkt[0][6] = second; 767 clock_enable_pkt[0][7] = 0x40; 768 769 clock_enable_pkt[1][0] = 0; 770 clock_enable_pkt[1][1] = 0; 771 clock_enable_pkt[1][2] = 1; 772 clock_enable_pkt[1][3] = 0; 773 clock_enable_pkt[1][4] = 0; 774 clock_enable_pkt[1][5] = 0; 775 clock_enable_pkt[1][6] = 0; 776 clock_enable_pkt[1][7] = 0x42; 777 778 break; 779 780 default: 781 return -ENODEV; 782 } 783 784 for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) { 785 memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8); 786 retval = send_packet(ictx); 787 if (retval) { 788 pr_err("send_packet failed for packet %d\n", i); 789 break; 790 } 791 } 792 793 return retval; 794} 795 796/* 797 * These are the sysfs functions to handle the association on the iMON 2.4G LT. 798 */ 799static ssize_t associate_remote_show(struct device *d, 800 struct device_attribute *attr, 801 char *buf) 802{ 803 struct imon_context *ictx = dev_get_drvdata(d); 804 805 if (!ictx) 806 return -ENODEV; 807 808 mutex_lock(&ictx->lock); 809 if (ictx->rf_isassociating) 810 strscpy(buf, "associating\n", PAGE_SIZE); 811 else 812 strscpy(buf, "closed\n", PAGE_SIZE); 813 814 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"); 815 mutex_unlock(&ictx->lock); 816 return strlen(buf); 817} 818 819static ssize_t associate_remote_store(struct device *d, 820 struct device_attribute *attr, 821 const char *buf, size_t count) 822{ 823 struct imon_context *ictx; 824 825 ictx = dev_get_drvdata(d); 826 827 if (!ictx) 828 return -ENODEV; 829 830 mutex_lock(&ictx->lock); 831 ictx->rf_isassociating = true; 832 send_associate_24g(ictx); 833 mutex_unlock(&ictx->lock); 834 835 return count; 836} 837 838/* 839 * sysfs functions to control internal imon clock 840 */ 841static ssize_t imon_clock_show(struct device *d, 842 struct device_attribute *attr, char *buf) 843{ 844 struct imon_context *ictx = dev_get_drvdata(d); 845 size_t len; 846 847 if (!ictx) 848 return -ENODEV; 849 850 mutex_lock(&ictx->lock); 851 852 if (!ictx->display_supported) { 853 len = sysfs_emit(buf, "Not supported."); 854 } else { 855 len = sysfs_emit(buf, 856 "To set the clock on your iMON display:\n" 857 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n" 858 "%s", ictx->display_isopen ? 859 "\nNOTE: imon device must be closed\n" : ""); 860 } 861 862 mutex_unlock(&ictx->lock); 863 864 return len; 865} 866 867static ssize_t imon_clock_store(struct device *d, 868 struct device_attribute *attr, 869 const char *buf, size_t count) 870{ 871 struct imon_context *ictx = dev_get_drvdata(d); 872 ssize_t retval; 873 unsigned int year, month, day, dow, hour, minute, second; 874 875 if (!ictx) 876 return -ENODEV; 877 878 mutex_lock(&ictx->lock); 879 880 if (!ictx->display_supported) { 881 retval = -ENODEV; 882 goto exit; 883 } else if (ictx->display_isopen) { 884 retval = -EBUSY; 885 goto exit; 886 } 887 888 if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow, 889 &hour, &minute, &second) != 7) { 890 retval = -EINVAL; 891 goto exit; 892 } 893 894 if ((month < 1 || month > 12) || 895 (day < 1 || day > 31) || (dow > 6) || 896 (hour > 23) || (minute > 59) || (second > 59)) { 897 retval = -EINVAL; 898 goto exit; 899 } 900 901 retval = send_set_imon_clock(ictx, year, month, day, dow, 902 hour, minute, second); 903 if (retval) 904 goto exit; 905 906 retval = count; 907exit: 908 mutex_unlock(&ictx->lock); 909 910 return retval; 911} 912 913 914static DEVICE_ATTR_RW(imon_clock); 915static DEVICE_ATTR_RW(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 (mutex_lock_interruptible(&ictx->lock)) 958 return -ERESTARTSYS; 959 960 if (ictx->disconnected) { 961 retval = -ENODEV; 962 goto exit; 963 } 964 965 if (!ictx->dev_present_intf0) { 966 pr_err_ratelimited("no iMON device present\n"); 967 retval = -ENODEV; 968 goto exit; 969 } 970 971 if (n_bytes <= 0 || n_bytes > 32) { 972 pr_err_ratelimited("invalid payload size\n"); 973 retval = -EINVAL; 974 goto exit; 975 } 976 977 if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) { 978 retval = -EFAULT; 979 goto exit; 980 } 981 982 /* Pad with spaces */ 983 for (i = n_bytes; i < 32; ++i) 984 ictx->tx.data_buf[i] = ' '; 985 986 for (i = 32; i < 35; ++i) 987 ictx->tx.data_buf[i] = 0xFF; 988 989 offset = 0; 990 seq = 0; 991 992 do { 993 memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7); 994 ictx->usb_tx_buf[7] = (unsigned char) seq; 995 996 retval = send_packet(ictx); 997 if (retval) { 998 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 999 goto exit; 1000 } else { 1001 seq += 2; 1002 offset += 7; 1003 } 1004 1005 } while (offset < 35); 1006 1007 /* Send packet #6 */ 1008 memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); 1009 ictx->usb_tx_buf[7] = (unsigned char) seq; 1010 retval = send_packet(ictx); 1011 if (retval) 1012 pr_err_ratelimited("send packet #%d failed\n", seq / 2); 1013 1014exit: 1015 mutex_unlock(&ictx->lock); 1016 1017 return (!retval) ? n_bytes : retval; 1018} 1019 1020/* 1021 * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte 1022 * packets. We accept data as 16 hexadecimal digits, followed by a 1023 * newline (to make it easy to drive the device from a command-line 1024 * -- even though the actual binary data is a bit complicated). 1025 * 1026 * The device itself is not a "traditional" text-mode display. It's 1027 * actually a 16x96 pixel bitmap display. That means if you want to 1028 * display text, you've got to have your own "font" and translate the 1029 * text into bitmaps for display. This is really flexible (you can 1030 * display whatever diacritics you need, and so on), but it's also 1031 * a lot more complicated than most LCDs... 1032 */ 1033static ssize_t lcd_write(struct file *file, const char __user *buf, 1034 size_t n_bytes, loff_t *pos) 1035{ 1036 int retval = 0; 1037 struct imon_context *ictx = file->private_data; 1038 1039 mutex_lock(&ictx->lock); 1040 1041 if (ictx->disconnected) { 1042 retval = -ENODEV; 1043 goto exit; 1044 } 1045 1046 if (!ictx->display_supported) { 1047 pr_err_ratelimited("no iMON display present\n"); 1048 retval = -ENODEV; 1049 goto exit; 1050 } 1051 1052 if (n_bytes != 8) { 1053 pr_err_ratelimited("invalid payload size: %d (expected 8)\n", 1054 (int)n_bytes); 1055 retval = -EINVAL; 1056 goto exit; 1057 } 1058 1059 if (copy_from_user(ictx->usb_tx_buf, buf, 8)) { 1060 retval = -EFAULT; 1061 goto exit; 1062 } 1063 1064 retval = send_packet(ictx); 1065 if (retval) { 1066 pr_err_ratelimited("send packet failed!\n"); 1067 goto exit; 1068 } else { 1069 dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n", 1070 __func__, (int) n_bytes); 1071 } 1072exit: 1073 mutex_unlock(&ictx->lock); 1074 return (!retval) ? n_bytes : retval; 1075} 1076 1077/* 1078 * Callback function for USB core API: transmit data 1079 */ 1080static void usb_tx_callback(struct urb *urb) 1081{ 1082 struct imon_context *ictx; 1083 1084 if (!urb) 1085 return; 1086 ictx = (struct imon_context *)urb->context; 1087 if (!ictx) 1088 return; 1089 1090 ictx->tx.status = urb->status; 1091 1092 /* notify waiters that write has finished */ 1093 ictx->tx.busy = false; 1094 smp_rmb(); /* ensure later readers know we're not busy */ 1095 complete(&ictx->tx.finished); 1096} 1097 1098/* 1099 * report touchscreen input 1100 */ 1101static void imon_touch_display_timeout(struct timer_list *t) 1102{ 1103 struct imon_context *ictx = timer_container_of(ictx, t, ttimer); 1104 1105 if (ictx->display_type != IMON_DISPLAY_TYPE_VGA) 1106 return; 1107 1108 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1109 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1110 input_report_key(ictx->touch, BTN_TOUCH, 0x00); 1111 input_sync(ictx->touch); 1112} 1113 1114/* 1115 * iMON IR receivers support two different signal sets -- those used by 1116 * the iMON remotes, and those used by the Windows MCE remotes (which is 1117 * really just RC-6), but only one or the other at a time, as the signals 1118 * are decoded onboard the receiver. 1119 * 1120 * This function gets called two different ways, one way is from 1121 * rc_register_device, for initial protocol selection/setup, and the other is 1122 * via a userspace-initiated protocol change request, either by direct sysfs 1123 * prodding or by something like ir-keytable. In the rc_register_device case, 1124 * the imon context lock is already held, but when initiated from userspace, 1125 * it is not, so we must acquire it prior to calling send_packet, which 1126 * requires that the lock is held. 1127 */ 1128static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto) 1129{ 1130 int retval; 1131 struct imon_context *ictx = rc->priv; 1132 struct device *dev = ictx->dev; 1133 const bool unlock = mutex_trylock(&ictx->lock); 1134 unsigned char ir_proto_packet[] = { 1135 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 }; 1136 1137 if (*rc_proto && !(*rc_proto & rc->allowed_protocols)) 1138 dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n"); 1139 1140 if (*rc_proto & RC_PROTO_BIT_RC6_MCE) { 1141 dev_dbg(dev, "Configuring IR receiver for MCE protocol\n"); 1142 ir_proto_packet[0] = 0x01; 1143 *rc_proto = RC_PROTO_BIT_RC6_MCE; 1144 } else if (*rc_proto & RC_PROTO_BIT_IMON) { 1145 dev_dbg(dev, "Configuring IR receiver for iMON protocol\n"); 1146 if (!pad_stabilize) 1147 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1148 /* ir_proto_packet[0] = 0x00; // already the default */ 1149 *rc_proto = RC_PROTO_BIT_IMON; 1150 } else { 1151 dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n"); 1152 if (!pad_stabilize) 1153 dev_dbg(dev, "PAD stabilize functionality disabled\n"); 1154 /* ir_proto_packet[0] = 0x00; // already the default */ 1155 *rc_proto = RC_PROTO_BIT_IMON; 1156 } 1157 1158 memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet)); 1159 1160 retval = send_packet(ictx); 1161 if (retval) 1162 goto out; 1163 1164 ictx->rc_proto = *rc_proto; 1165 ictx->pad_mouse = false; 1166 1167out: 1168 if (unlock) 1169 mutex_unlock(&ictx->lock); 1170 1171 return retval; 1172} 1173 1174/* 1175 * The directional pad behaves a bit differently, depending on whether this is 1176 * one of the older ffdc devices or a newer device. Newer devices appear to 1177 * have a higher resolution matrix for more precise mouse movement, but it 1178 * makes things overly sensitive in keyboard mode, so we do some interesting 1179 * contortions to make it less touchy. Older devices run through the same 1180 * routine with shorter timeout and a smaller threshold. 1181 */ 1182static int stabilize(int a, int b, u16 timeout, u16 threshold) 1183{ 1184 ktime_t ct; 1185 static ktime_t prev_time; 1186 static ktime_t hit_time; 1187 static int x, y, prev_result, hits; 1188 int result = 0; 1189 long msec, msec_hit; 1190 1191 ct = ktime_get(); 1192 msec = ktime_ms_delta(ct, prev_time); 1193 msec_hit = ktime_ms_delta(ct, hit_time); 1194 1195 if (msec > 100) { 1196 x = 0; 1197 y = 0; 1198 hits = 0; 1199 } 1200 1201 x += a; 1202 y += b; 1203 1204 prev_time = ct; 1205 1206 if (abs(x) > threshold || abs(y) > threshold) { 1207 if (abs(y) > abs(x)) 1208 result = (y > 0) ? 0x7F : 0x80; 1209 else 1210 result = (x > 0) ? 0x7F00 : 0x8000; 1211 1212 x = 0; 1213 y = 0; 1214 1215 if (result == prev_result) { 1216 hits++; 1217 1218 if (hits > 3) { 1219 switch (result) { 1220 case 0x7F: 1221 y = 17 * threshold / 30; 1222 break; 1223 case 0x80: 1224 y -= 17 * threshold / 30; 1225 break; 1226 case 0x7F00: 1227 x = 17 * threshold / 30; 1228 break; 1229 case 0x8000: 1230 x -= 17 * threshold / 30; 1231 break; 1232 } 1233 } 1234 1235 if (hits == 2 && msec_hit < timeout) { 1236 result = 0; 1237 hits = 1; 1238 } 1239 } else { 1240 prev_result = result; 1241 hits = 1; 1242 hit_time = ct; 1243 } 1244 } 1245 1246 return result; 1247} 1248 1249static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 scancode) 1250{ 1251 u32 keycode; 1252 u32 release; 1253 bool is_release_code = false; 1254 1255 /* Look for the initial press of a button */ 1256 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1257 ictx->rc_toggle = 0x0; 1258 ictx->rc_scancode = scancode; 1259 1260 /* Look for the release of a button */ 1261 if (keycode == KEY_RESERVED) { 1262 release = scancode & ~0x4000; 1263 keycode = rc_g_keycode_from_table(ictx->rdev, release); 1264 if (keycode != KEY_RESERVED) 1265 is_release_code = true; 1266 } 1267 1268 ictx->release_code = is_release_code; 1269 1270 return keycode; 1271} 1272 1273static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 scancode) 1274{ 1275 u32 keycode; 1276 1277#define MCE_KEY_MASK 0x7000 1278#define MCE_TOGGLE_BIT 0x8000 1279 1280 /* 1281 * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx 1282 * (the toggle bit flipping between alternating key presses), while 1283 * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep 1284 * the table trim, we always or in the bits to look up 0x8000ff4xx, 1285 * but we can't or them into all codes, as some keys are decoded in 1286 * a different way w/o the same use of the toggle bit... 1287 */ 1288 if (scancode & 0x80000000) 1289 scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT; 1290 1291 ictx->rc_scancode = scancode; 1292 keycode = rc_g_keycode_from_table(ictx->rdev, scancode); 1293 1294 /* not used in mce mode, but make sure we know its false */ 1295 ictx->release_code = false; 1296 1297 return keycode; 1298} 1299 1300static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code) 1301{ 1302 const struct imon_panel_key_table *key_table; 1303 u32 keycode = KEY_RESERVED; 1304 int i; 1305 1306 key_table = ictx->dev_descr->key_table; 1307 1308 for (i = 0; key_table[i].hw_code != 0; i++) { 1309 if (key_table[i].hw_code == (code | 0xffee)) { 1310 keycode = key_table[i].keycode; 1311 break; 1312 } 1313 } 1314 ictx->release_code = false; 1315 return keycode; 1316} 1317 1318static bool imon_mouse_event(struct imon_context *ictx, 1319 unsigned char *buf, int len) 1320{ 1321 signed char rel_x = 0x00, rel_y = 0x00; 1322 u8 right_shift = 1; 1323 bool mouse_input = true; 1324 int dir = 0; 1325 unsigned long flags; 1326 1327 spin_lock_irqsave(&ictx->kc_lock, flags); 1328 1329 /* newer iMON device PAD or mouse button */ 1330 if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) { 1331 rel_x = buf[2]; 1332 rel_y = buf[3]; 1333 right_shift = 1; 1334 /* 0xffdc iMON PAD or mouse button input */ 1335 } else if (ictx->product == 0xffdc && (buf[0] & 0x40) && 1336 !((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) { 1337 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1338 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1339 if (buf[0] & 0x02) 1340 rel_x |= ~0x0f; 1341 rel_x = rel_x + rel_x / 2; 1342 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1343 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1344 if (buf[0] & 0x01) 1345 rel_y |= ~0x0f; 1346 rel_y = rel_y + rel_y / 2; 1347 right_shift = 2; 1348 /* some ffdc devices decode mouse buttons differently... */ 1349 } else if (ictx->product == 0xffdc && (buf[0] == 0x68)) { 1350 right_shift = 2; 1351 /* ch+/- buttons, which we use for an emulated scroll wheel */ 1352 } else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) { 1353 dir = 1; 1354 } else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) { 1355 dir = -1; 1356 } else 1357 mouse_input = false; 1358 1359 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1360 1361 if (mouse_input) { 1362 dev_dbg(ictx->dev, "sending mouse data via input subsystem\n"); 1363 1364 if (dir) { 1365 input_report_rel(ictx->idev, REL_WHEEL, dir); 1366 } else if (rel_x || rel_y) { 1367 input_report_rel(ictx->idev, REL_X, rel_x); 1368 input_report_rel(ictx->idev, REL_Y, rel_y); 1369 } else { 1370 input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1); 1371 input_report_key(ictx->idev, BTN_RIGHT, 1372 buf[1] >> right_shift & 0x1); 1373 } 1374 input_sync(ictx->idev); 1375 spin_lock_irqsave(&ictx->kc_lock, flags); 1376 ictx->last_keycode = ictx->kc; 1377 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1378 } 1379 1380 return mouse_input; 1381} 1382 1383static void imon_touch_event(struct imon_context *ictx, unsigned char *buf) 1384{ 1385 mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT); 1386 ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4); 1387 ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf)); 1388 input_report_abs(ictx->touch, ABS_X, ictx->touch_x); 1389 input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); 1390 input_report_key(ictx->touch, BTN_TOUCH, 0x01); 1391 input_sync(ictx->touch); 1392} 1393 1394static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf) 1395{ 1396 int dir = 0; 1397 signed char rel_x = 0x00, rel_y = 0x00; 1398 u16 timeout, threshold; 1399 u32 scancode = KEY_RESERVED; 1400 unsigned long flags; 1401 1402 /* 1403 * The imon directional pad functions more like a touchpad. Bytes 3 & 4 1404 * contain a position coordinate (x,y), with each component ranging 1405 * from -14 to 14. We want to down-sample this to only 4 discrete values 1406 * for up/down/left/right arrow keys. Also, when you get too close to 1407 * diagonals, it has a tendency to jump back and forth, so lets try to 1408 * ignore when they get too close. 1409 */ 1410 if (ictx->product != 0xffdc) { 1411 /* first, pad to 8 bytes so it conforms with everything else */ 1412 buf[5] = buf[6] = buf[7] = 0; 1413 timeout = 500; /* in msecs */ 1414 /* (2*threshold) x (2*threshold) square */ 1415 threshold = pad_thresh ? pad_thresh : 28; 1416 rel_x = buf[2]; 1417 rel_y = buf[3]; 1418 1419 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1420 if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) { 1421 dir = stabilize((int)rel_x, (int)rel_y, 1422 timeout, threshold); 1423 if (!dir) { 1424 spin_lock_irqsave(&ictx->kc_lock, 1425 flags); 1426 ictx->kc = KEY_UNKNOWN; 1427 spin_unlock_irqrestore(&ictx->kc_lock, 1428 flags); 1429 return; 1430 } 1431 buf[2] = dir & 0xFF; 1432 buf[3] = (dir >> 8) & 0xFF; 1433 scancode = be32_to_cpu(*((__be32 *)buf)); 1434 } 1435 } else { 1436 /* 1437 * Hack alert: instead of using keycodes, we have 1438 * to use hard-coded scancodes here... 1439 */ 1440 if (abs(rel_y) > abs(rel_x)) { 1441 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1442 buf[3] = 0; 1443 if (rel_y > 0) 1444 scancode = 0x01007f00; /* KEY_DOWN */ 1445 else 1446 scancode = 0x01008000; /* KEY_UP */ 1447 } else { 1448 buf[2] = 0; 1449 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1450 if (rel_x > 0) 1451 scancode = 0x0100007f; /* KEY_RIGHT */ 1452 else 1453 scancode = 0x01000080; /* KEY_LEFT */ 1454 } 1455 } 1456 1457 /* 1458 * Handle on-board decoded pad events for e.g. older VFD/iMON-Pad 1459 * device (15c2:ffdc). The remote generates various codes from 1460 * 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates 1461 * 0x688301b7 and the right one 0x688481b7. All other keys generate 1462 * 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with 1463 * reversed endianness. Extract direction from buffer, rotate endianness, 1464 * adjust sign and feed the values into stabilize(). The resulting codes 1465 * will be 0x01008000, 0x01007F00, which match the newer devices. 1466 */ 1467 } else { 1468 timeout = 10; /* in msecs */ 1469 /* (2*threshold) x (2*threshold) square */ 1470 threshold = pad_thresh ? pad_thresh : 15; 1471 1472 /* buf[1] is x */ 1473 rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 | 1474 (buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6; 1475 if (buf[0] & 0x02) 1476 rel_x |= ~0x10+1; 1477 /* buf[2] is y */ 1478 rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 | 1479 (buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6; 1480 if (buf[0] & 0x01) 1481 rel_y |= ~0x10+1; 1482 1483 buf[0] = 0x01; 1484 buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0; 1485 1486 if (ictx->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) { 1487 dir = stabilize((int)rel_x, (int)rel_y, 1488 timeout, threshold); 1489 if (!dir) { 1490 spin_lock_irqsave(&ictx->kc_lock, flags); 1491 ictx->kc = KEY_UNKNOWN; 1492 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1493 return; 1494 } 1495 buf[2] = dir & 0xFF; 1496 buf[3] = (dir >> 8) & 0xFF; 1497 scancode = be32_to_cpu(*((__be32 *)buf)); 1498 } else { 1499 /* 1500 * Hack alert: instead of using keycodes, we have 1501 * to use hard-coded scancodes here... 1502 */ 1503 if (abs(rel_y) > abs(rel_x)) { 1504 buf[2] = (rel_y > 0) ? 0x7F : 0x80; 1505 buf[3] = 0; 1506 if (rel_y > 0) 1507 scancode = 0x01007f00; /* KEY_DOWN */ 1508 else 1509 scancode = 0x01008000; /* KEY_UP */ 1510 } else { 1511 buf[2] = 0; 1512 buf[3] = (rel_x > 0) ? 0x7F : 0x80; 1513 if (rel_x > 0) 1514 scancode = 0x0100007f; /* KEY_RIGHT */ 1515 else 1516 scancode = 0x01000080; /* KEY_LEFT */ 1517 } 1518 } 1519 } 1520 1521 if (scancode) { 1522 spin_lock_irqsave(&ictx->kc_lock, flags); 1523 ictx->kc = imon_remote_key_lookup(ictx, scancode); 1524 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1525 } 1526} 1527 1528/* 1529 * figure out if these is a press or a release. We don't actually 1530 * care about repeats, as those will be auto-generated within the IR 1531 * subsystem for repeating scancodes. 1532 */ 1533static int imon_parse_press_type(struct imon_context *ictx, 1534 unsigned char *buf, u8 ktype) 1535{ 1536 int press_type = 0; 1537 unsigned long flags; 1538 1539 spin_lock_irqsave(&ictx->kc_lock, flags); 1540 1541 /* key release of 0x02XXXXXX key */ 1542 if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00) 1543 ictx->kc = ictx->last_keycode; 1544 1545 /* mouse button release on (some) 0xffdc devices */ 1546 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 && 1547 buf[2] == 0x81 && buf[3] == 0xb7) 1548 ictx->kc = ictx->last_keycode; 1549 1550 /* mouse button release on (some other) 0xffdc devices */ 1551 else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 && 1552 buf[2] == 0x81 && buf[3] == 0xb7) 1553 ictx->kc = ictx->last_keycode; 1554 1555 /* mce-specific button handling, no keyup events */ 1556 else if (ktype == IMON_KEY_MCE) { 1557 ictx->rc_toggle = buf[2]; 1558 press_type = 1; 1559 1560 /* incoherent or irrelevant data */ 1561 } else if (ictx->kc == KEY_RESERVED) 1562 press_type = -EINVAL; 1563 1564 /* key release of 0xXXXXXXb7 key */ 1565 else if (ictx->release_code) 1566 press_type = 0; 1567 1568 /* this is a button press */ 1569 else 1570 press_type = 1; 1571 1572 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1573 1574 return press_type; 1575} 1576 1577/* 1578 * Process the incoming packet 1579 */ 1580static void imon_incoming_packet(struct imon_context *ictx, 1581 struct urb *urb, int intf) 1582{ 1583 int len = urb->actual_length; 1584 unsigned char *buf = urb->transfer_buffer; 1585 struct device *dev = ictx->dev; 1586 unsigned long flags; 1587 u32 kc; 1588 u64 scancode; 1589 int press_type = 0; 1590 ktime_t t; 1591 static ktime_t prev_time; 1592 u8 ktype; 1593 1594 /* filter out junk data on the older 0xffdc imon devices */ 1595 if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff)) 1596 return; 1597 1598 /* Figure out what key was pressed */ 1599 if (len == 8 && buf[7] == 0xee) { 1600 scancode = be64_to_cpu(*((__be64 *)buf)); 1601 ktype = IMON_KEY_PANEL; 1602 kc = imon_panel_key_lookup(ictx, scancode); 1603 ictx->release_code = false; 1604 } else { 1605 scancode = be32_to_cpu(*((__be32 *)buf)); 1606 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) { 1607 ktype = IMON_KEY_IMON; 1608 if (buf[0] == 0x80) 1609 ktype = IMON_KEY_MCE; 1610 kc = imon_mce_key_lookup(ictx, scancode); 1611 } else { 1612 ktype = IMON_KEY_IMON; 1613 kc = imon_remote_key_lookup(ictx, scancode); 1614 } 1615 } 1616 1617 spin_lock_irqsave(&ictx->kc_lock, flags); 1618 /* keyboard/mouse mode toggle button */ 1619 if (kc == KEY_KEYBOARD && !ictx->release_code) { 1620 ictx->last_keycode = kc; 1621 if (!nomouse) { 1622 ictx->pad_mouse = !ictx->pad_mouse; 1623 dev_dbg(dev, "toggling to %s mode\n", 1624 ictx->pad_mouse ? "mouse" : "keyboard"); 1625 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1626 return; 1627 } else { 1628 ictx->pad_mouse = false; 1629 dev_dbg(dev, "mouse mode disabled, passing key value\n"); 1630 } 1631 } 1632 1633 ictx->kc = kc; 1634 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1635 1636 /* send touchscreen events through input subsystem if touchpad data */ 1637 if (ictx->touch && len == 8 && buf[7] == 0x86) { 1638 imon_touch_event(ictx, buf); 1639 return; 1640 1641 /* look for mouse events with pad in mouse mode */ 1642 } else if (ictx->pad_mouse) { 1643 if (imon_mouse_event(ictx, buf, len)) 1644 return; 1645 } 1646 1647 /* Now for some special handling to convert pad input to arrow keys */ 1648 if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) || 1649 ((len == 8) && (buf[0] & 0x40) && 1650 !(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) { 1651 len = 8; 1652 imon_pad_to_keys(ictx, buf); 1653 } 1654 1655 if (debug) { 1656 printk(KERN_INFO "intf%d decoded packet: %*ph\n", 1657 intf, len, buf); 1658 } 1659 1660 press_type = imon_parse_press_type(ictx, buf, ktype); 1661 if (press_type < 0) 1662 goto not_input_data; 1663 1664 if (ktype != IMON_KEY_PANEL) { 1665 if (press_type == 0) 1666 rc_keyup(ictx->rdev); 1667 else { 1668 enum rc_proto proto; 1669 1670 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 1671 proto = RC_PROTO_RC6_MCE; 1672 else if (ictx->rc_proto == RC_PROTO_BIT_IMON) 1673 proto = RC_PROTO_IMON; 1674 else 1675 return; 1676 1677 rc_keydown(ictx->rdev, proto, ictx->rc_scancode, 1678 ictx->rc_toggle); 1679 1680 spin_lock_irqsave(&ictx->kc_lock, flags); 1681 ictx->last_keycode = ictx->kc; 1682 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1683 } 1684 return; 1685 } 1686 1687 /* Only panel type events left to process now */ 1688 spin_lock_irqsave(&ictx->kc_lock, flags); 1689 1690 t = ktime_get(); 1691 /* KEY repeats from knob and panel that need to be suppressed */ 1692 if (ictx->kc == KEY_MUTE || 1693 ictx->dev_descr->flags & IMON_SUPPRESS_REPEATED_KEYS) { 1694 if (ictx->kc == ictx->last_keycode && 1695 ktime_ms_delta(t, prev_time) < ictx->idev->rep[REP_DELAY]) { 1696 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1697 return; 1698 } 1699 } 1700 1701 prev_time = t; 1702 kc = ictx->kc; 1703 1704 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1705 1706 input_report_key(ictx->idev, kc, press_type); 1707 input_sync(ictx->idev); 1708 1709 /* panel keys don't generate a release */ 1710 input_report_key(ictx->idev, kc, 0); 1711 input_sync(ictx->idev); 1712 1713 spin_lock_irqsave(&ictx->kc_lock, flags); 1714 ictx->last_keycode = kc; 1715 spin_unlock_irqrestore(&ictx->kc_lock, flags); 1716 1717 return; 1718 1719not_input_data: 1720 if (len != 8) { 1721 dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n", 1722 __func__, len, intf); 1723 return; 1724 } 1725 1726 /* iMON 2.4G associate frame */ 1727 if (buf[0] == 0x00 && 1728 buf[2] == 0xFF && /* REFID */ 1729 buf[3] == 0xFF && 1730 buf[4] == 0xFF && 1731 buf[5] == 0xFF && /* iMON 2.4G */ 1732 ((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */ 1733 (buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */ 1734 dev_warn(dev, "%s: remote associated refid=%02X\n", 1735 __func__, buf[1]); 1736 ictx->rf_isassociating = false; 1737 } 1738} 1739 1740/* 1741 * Callback function for USB core API: receive data 1742 */ 1743static void usb_rx_callback_intf0(struct urb *urb) 1744{ 1745 struct imon_context *ictx; 1746 int intfnum = 0; 1747 1748 if (!urb) 1749 return; 1750 1751 ictx = (struct imon_context *)urb->context; 1752 if (!ictx) 1753 return; 1754 1755 switch (urb->status) { 1756 case -ENOENT: /* usbcore unlink successful! */ 1757 return; 1758 1759 case -ESHUTDOWN: /* transport endpoint was shut down */ 1760 break; 1761 1762 case 0: 1763 /* 1764 * if we get a callback before we're done configuring the hardware, we 1765 * can't yet process the data, as there's nowhere to send it, but we 1766 * still need to submit a new rx URB to avoid wedging the hardware 1767 */ 1768 if (ictx->dev_present_intf0) 1769 imon_incoming_packet(ictx, urb, intfnum); 1770 break; 1771 1772 case -ECONNRESET: 1773 case -EILSEQ: 1774 case -EPROTO: 1775 case -EPIPE: 1776 dev_warn(ictx->dev, "imon %s: status(%d)\n", 1777 __func__, urb->status); 1778 return; 1779 1780 default: 1781 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1782 __func__, urb->status); 1783 break; 1784 } 1785 1786 usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC); 1787} 1788 1789static void usb_rx_callback_intf1(struct urb *urb) 1790{ 1791 struct imon_context *ictx; 1792 int intfnum = 1; 1793 1794 if (!urb) 1795 return; 1796 1797 ictx = (struct imon_context *)urb->context; 1798 if (!ictx) 1799 return; 1800 1801 switch (urb->status) { 1802 case -ENOENT: /* usbcore unlink successful! */ 1803 return; 1804 1805 case -ESHUTDOWN: /* transport endpoint was shut down */ 1806 break; 1807 1808 case 0: 1809 /* 1810 * if we get a callback before we're done configuring the hardware, we 1811 * can't yet process the data, as there's nowhere to send it, but we 1812 * still need to submit a new rx URB to avoid wedging the hardware 1813 */ 1814 if (ictx->dev_present_intf1) 1815 imon_incoming_packet(ictx, urb, intfnum); 1816 break; 1817 1818 case -ECONNRESET: 1819 case -EILSEQ: 1820 case -EPROTO: 1821 case -EPIPE: 1822 dev_warn(ictx->dev, "imon %s: status(%d)\n", 1823 __func__, urb->status); 1824 return; 1825 1826 default: 1827 dev_warn(ictx->dev, "imon %s: status(%d): ignored\n", 1828 __func__, urb->status); 1829 break; 1830 } 1831 1832 usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC); 1833} 1834 1835/* 1836 * The 0x15c2:0xffdc device ID was used for umpteen different imon 1837 * devices, and all of them constantly spew interrupts, even when there 1838 * is no actual data to report. However, byte 6 of this buffer looks like 1839 * its unique across device variants, so we're trying to key off that to 1840 * figure out which display type (if any) and what IR protocol the device 1841 * actually supports. These devices have their IR protocol hard-coded into 1842 * their firmware, they can't be changed on the fly like the newer hardware. 1843 */ 1844static void imon_get_ffdc_type(struct imon_context *ictx) 1845{ 1846 u8 ffdc_cfg_byte = ictx->usb_rx_buf[6]; 1847 u8 detected_display_type = IMON_DISPLAY_TYPE_NONE; 1848 u64 allowed_protos = RC_PROTO_BIT_IMON; 1849 1850 switch (ffdc_cfg_byte) { 1851 /* iMON Knob, no display, iMON IR + vol knob */ 1852 case 0x21: 1853 dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR"); 1854 ictx->display_supported = false; 1855 break; 1856 /* iMON 2.4G LT (usb stick), no display, iMON RF */ 1857 case 0x4e: 1858 dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF"); 1859 ictx->display_supported = false; 1860 ictx->rf_device = true; 1861 break; 1862 /* iMON VFD, no IR (does have vol knob tho) */ 1863 case 0x35: 1864 dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR"); 1865 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1866 break; 1867 /* iMON VFD, iMON IR */ 1868 case 0x24: 1869 case 0x30: 1870 case 0x85: 1871 dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR"); 1872 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1873 break; 1874 /* iMON VFD, MCE IR */ 1875 case 0x46: 1876 case 0x9e: 1877 dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR"); 1878 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1879 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1880 break; 1881 /* iMON VFD, iMON or MCE IR */ 1882 case 0x7e: 1883 dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR"); 1884 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1885 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1886 break; 1887 /* iMON LCD, MCE IR */ 1888 case 0x9f: 1889 dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR"); 1890 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1891 allowed_protos = RC_PROTO_BIT_RC6_MCE; 1892 break; 1893 /* no display, iMON IR */ 1894 case 0x26: 1895 dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR"); 1896 ictx->display_supported = false; 1897 break; 1898 /* Soundgraph iMON UltraBay */ 1899 case 0x98: 1900 dev_info(ictx->dev, "0xffdc iMON UltraBay, LCD + IR"); 1901 detected_display_type = IMON_DISPLAY_TYPE_LCD; 1902 allowed_protos = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 1903 ictx->dev_descr = &ultrabay_table; 1904 break; 1905 1906 default: 1907 dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR"); 1908 detected_display_type = IMON_DISPLAY_TYPE_VFD; 1909 /* 1910 * We don't know which one it is, allow user to set the 1911 * RC6 one from userspace if IMON wasn't correct. 1912 */ 1913 allowed_protos |= RC_PROTO_BIT_RC6_MCE; 1914 break; 1915 } 1916 1917 printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte); 1918 1919 ictx->display_type = detected_display_type; 1920 ictx->rc_proto = allowed_protos; 1921} 1922 1923static void imon_set_display_type(struct imon_context *ictx) 1924{ 1925 u8 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1926 1927 /* 1928 * Try to auto-detect the type of display if the user hasn't set 1929 * it by hand via the display_type modparam. Default is VFD. 1930 */ 1931 1932 if (display_type == IMON_DISPLAY_TYPE_AUTO) { 1933 switch (ictx->product) { 1934 case 0xffdc: 1935 /* set in imon_get_ffdc_type() */ 1936 configured_display_type = ictx->display_type; 1937 break; 1938 case 0x0034: 1939 case 0x0035: 1940 configured_display_type = IMON_DISPLAY_TYPE_VGA; 1941 break; 1942 case 0x0038: 1943 case 0x0039: 1944 case 0x0045: 1945 configured_display_type = IMON_DISPLAY_TYPE_LCD; 1946 break; 1947 case 0x003c: 1948 case 0x0041: 1949 case 0x0042: 1950 case 0x0043: 1951 configured_display_type = IMON_DISPLAY_TYPE_NONE; 1952 ictx->display_supported = false; 1953 break; 1954 case 0x0036: 1955 case 0x0044: 1956 default: 1957 configured_display_type = IMON_DISPLAY_TYPE_VFD; 1958 break; 1959 } 1960 } else { 1961 configured_display_type = display_type; 1962 if (display_type == IMON_DISPLAY_TYPE_NONE) 1963 ictx->display_supported = false; 1964 else 1965 ictx->display_supported = true; 1966 dev_info(ictx->dev, "%s: overriding display type to %d via modparam\n", 1967 __func__, display_type); 1968 } 1969 1970 ictx->display_type = configured_display_type; 1971} 1972 1973static struct rc_dev *imon_init_rdev(struct imon_context *ictx) 1974{ 1975 struct rc_dev *rdev; 1976 int ret; 1977 static const unsigned char fp_packet[] = { 1978 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 }; 1979 1980 rdev = rc_allocate_device(RC_DRIVER_SCANCODE); 1981 if (!rdev) { 1982 dev_err(ictx->dev, "remote control dev allocation failed\n"); 1983 goto out; 1984 } 1985 1986 snprintf(ictx->name_rdev, sizeof(ictx->name_rdev), 1987 "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product); 1988 usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev, 1989 sizeof(ictx->phys_rdev)); 1990 strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev)); 1991 1992 rdev->device_name = ictx->name_rdev; 1993 rdev->input_phys = ictx->phys_rdev; 1994 usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id); 1995 rdev->dev.parent = ictx->dev; 1996 1997 rdev->priv = ictx; 1998 /* iMON PAD or MCE */ 1999 rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE; 2000 rdev->change_protocol = imon_ir_change_protocol; 2001 rdev->driver_name = MOD_NAME; 2002 2003 /* Enable front-panel buttons and/or knobs */ 2004 memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet)); 2005 ret = send_packet(ictx); 2006 /* Not fatal, but warn about it */ 2007 if (ret) 2008 dev_info(ictx->dev, "panel buttons/knobs setup failed\n"); 2009 2010 if (ictx->product == 0xffdc) { 2011 imon_get_ffdc_type(ictx); 2012 rdev->allowed_protocols = ictx->rc_proto; 2013 } 2014 2015 imon_set_display_type(ictx); 2016 2017 if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) 2018 rdev->map_name = RC_MAP_IMON_MCE; 2019 else 2020 rdev->map_name = RC_MAP_IMON_PAD; 2021 2022 ret = rc_register_device(rdev); 2023 if (ret < 0) { 2024 dev_err(ictx->dev, "remote input dev register failed\n"); 2025 goto out; 2026 } 2027 2028 return rdev; 2029 2030out: 2031 rc_free_device(rdev); 2032 return NULL; 2033} 2034 2035static struct input_dev *imon_init_idev(struct imon_context *ictx) 2036{ 2037 const struct imon_panel_key_table *key_table; 2038 struct input_dev *idev; 2039 int ret, i; 2040 2041 key_table = ictx->dev_descr->key_table; 2042 2043 idev = input_allocate_device(); 2044 if (!idev) 2045 goto out; 2046 2047 snprintf(ictx->name_idev, sizeof(ictx->name_idev), 2048 "iMON Panel, Knob and Mouse(%04x:%04x)", 2049 ictx->vendor, ictx->product); 2050 idev->name = ictx->name_idev; 2051 2052 usb_make_path(ictx->usbdev_intf0, ictx->phys_idev, 2053 sizeof(ictx->phys_idev)); 2054 strlcat(ictx->phys_idev, "/input1", sizeof(ictx->phys_idev)); 2055 idev->phys = ictx->phys_idev; 2056 2057 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL); 2058 2059 idev->keybit[BIT_WORD(BTN_MOUSE)] = 2060 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2061 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | 2062 BIT_MASK(REL_WHEEL); 2063 2064 /* panel and/or knob code support */ 2065 for (i = 0; key_table[i].hw_code != 0; i++) { 2066 u32 kc = key_table[i].keycode; 2067 __set_bit(kc, idev->keybit); 2068 } 2069 2070 usb_to_input_id(ictx->usbdev_intf0, &idev->id); 2071 idev->dev.parent = ictx->dev; 2072 input_set_drvdata(idev, ictx); 2073 2074 ret = input_register_device(idev); 2075 if (ret < 0) { 2076 dev_err(ictx->dev, "input dev register failed\n"); 2077 goto out; 2078 } 2079 2080 return idev; 2081 2082out: 2083 input_free_device(idev); 2084 return NULL; 2085} 2086 2087static struct input_dev *imon_init_touch(struct imon_context *ictx) 2088{ 2089 struct input_dev *touch; 2090 int ret; 2091 2092 touch = input_allocate_device(); 2093 if (!touch) 2094 goto touch_alloc_failed; 2095 2096 snprintf(ictx->name_touch, sizeof(ictx->name_touch), 2097 "iMON USB Touchscreen (%04x:%04x)", 2098 ictx->vendor, ictx->product); 2099 touch->name = ictx->name_touch; 2100 2101 usb_make_path(ictx->usbdev_intf1, ictx->phys_touch, 2102 sizeof(ictx->phys_touch)); 2103 strlcat(ictx->phys_touch, "/input2", sizeof(ictx->phys_touch)); 2104 touch->phys = ictx->phys_touch; 2105 2106 touch->evbit[0] = 2107 BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 2108 touch->keybit[BIT_WORD(BTN_TOUCH)] = 2109 BIT_MASK(BTN_TOUCH); 2110 input_set_abs_params(touch, ABS_X, 2111 0x00, 0xfff, 0, 0); 2112 input_set_abs_params(touch, ABS_Y, 2113 0x00, 0xfff, 0, 0); 2114 2115 input_set_drvdata(touch, ictx); 2116 2117 usb_to_input_id(ictx->usbdev_intf1, &touch->id); 2118 touch->dev.parent = ictx->dev; 2119 ret = input_register_device(touch); 2120 if (ret < 0) { 2121 dev_info(ictx->dev, "touchscreen input dev register failed\n"); 2122 goto touch_register_failed; 2123 } 2124 2125 return touch; 2126 2127touch_register_failed: 2128 input_free_device(touch); 2129 2130touch_alloc_failed: 2131 return NULL; 2132} 2133 2134static bool imon_find_endpoints(struct imon_context *ictx, 2135 struct usb_host_interface *iface_desc) 2136{ 2137 struct usb_endpoint_descriptor *ep; 2138 struct usb_endpoint_descriptor *rx_endpoint = NULL; 2139 struct usb_endpoint_descriptor *tx_endpoint = NULL; 2140 int ifnum = iface_desc->desc.bInterfaceNumber; 2141 int num_endpts = iface_desc->desc.bNumEndpoints; 2142 int i, ep_dir, ep_type; 2143 bool ir_ep_found = false; 2144 bool display_ep_found = false; 2145 bool tx_control = false; 2146 2147 /* 2148 * Scan the endpoint list and set: 2149 * first input endpoint = IR endpoint 2150 * first output endpoint = display endpoint 2151 */ 2152 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) { 2153 ep = &iface_desc->endpoint[i].desc; 2154 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; 2155 ep_type = usb_endpoint_type(ep); 2156 2157 if (!ir_ep_found && ep_dir == USB_DIR_IN && 2158 ep_type == USB_ENDPOINT_XFER_INT) { 2159 2160 rx_endpoint = ep; 2161 ir_ep_found = true; 2162 dev_dbg(ictx->dev, "%s: found IR endpoint\n", __func__); 2163 2164 } else if (!display_ep_found && ep_dir == USB_DIR_OUT && 2165 ep_type == USB_ENDPOINT_XFER_INT) { 2166 tx_endpoint = ep; 2167 display_ep_found = true; 2168 dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__); 2169 } 2170 } 2171 2172 if (ifnum == 0) { 2173 ictx->rx_endpoint_intf0 = rx_endpoint; 2174 /* 2175 * tx is used to send characters to lcd/vfd, associate RF 2176 * remotes, set IR protocol, and maybe more... 2177 */ 2178 ictx->tx_endpoint = tx_endpoint; 2179 } else { 2180 ictx->rx_endpoint_intf1 = rx_endpoint; 2181 } 2182 2183 /* 2184 * If we didn't find a display endpoint, this is probably one of the 2185 * newer iMON devices that use control urb instead of interrupt 2186 */ 2187 if (!display_ep_found) { 2188 tx_control = true; 2189 display_ep_found = true; 2190 dev_dbg(ictx->dev, "%s: device uses control endpoint, not interface OUT endpoint\n", 2191 __func__); 2192 } 2193 2194 /* 2195 * Some iMON receivers have no display. Unfortunately, it seems 2196 * that SoundGraph recycles device IDs between devices both with 2197 * and without... :\ 2198 */ 2199 if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) { 2200 display_ep_found = false; 2201 dev_dbg(ictx->dev, "%s: device has no display\n", __func__); 2202 } 2203 2204 /* 2205 * iMON Touch devices have a VGA touchscreen, but no "display", as 2206 * that refers to e.g. /dev/lcd0 (a character device LCD or VFD). 2207 */ 2208 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2209 display_ep_found = false; 2210 dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__); 2211 } 2212 2213 /* Input endpoint is mandatory */ 2214 if (!ir_ep_found) 2215 pr_err("no valid input (IR) endpoint found\n"); 2216 2217 ictx->tx_control = tx_control; 2218 2219 if (display_ep_found) 2220 ictx->display_supported = true; 2221 2222 return ir_ep_found; 2223 2224} 2225 2226static struct imon_context *imon_init_intf0(struct usb_interface *intf, 2227 const struct usb_device_id *id) 2228{ 2229 struct imon_context *ictx; 2230 struct urb *rx_urb; 2231 struct urb *tx_urb; 2232 struct device *dev = &intf->dev; 2233 struct usb_host_interface *iface_desc; 2234 int ret = -ENOMEM; 2235 2236 ictx = kzalloc(sizeof(*ictx), GFP_KERNEL); 2237 if (!ictx) 2238 goto exit; 2239 2240 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2241 if (!rx_urb) 2242 goto rx_urb_alloc_failed; 2243 tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2244 if (!tx_urb) 2245 goto tx_urb_alloc_failed; 2246 2247 mutex_init(&ictx->lock); 2248 spin_lock_init(&ictx->kc_lock); 2249 2250 mutex_lock(&ictx->lock); 2251 2252 ictx->dev = dev; 2253 ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf)); 2254 ictx->rx_urb_intf0 = rx_urb; 2255 ictx->tx_urb = tx_urb; 2256 ictx->rf_device = false; 2257 2258 init_completion(&ictx->tx.finished); 2259 2260 ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor); 2261 ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct); 2262 2263 /* save drive info for later accessing the panel/knob key table */ 2264 ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info; 2265 /* default send_packet delay is 5ms but some devices need more */ 2266 ictx->send_packet_delay = ictx->dev_descr->flags & 2267 IMON_NEED_20MS_PKT_DELAY ? 20 : 5; 2268 2269 ret = -ENODEV; 2270 iface_desc = intf->cur_altsetting; 2271 if (!imon_find_endpoints(ictx, iface_desc)) { 2272 goto find_endpoint_failed; 2273 } 2274 2275 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2276 usb_rcvintpipe(ictx->usbdev_intf0, 2277 ictx->rx_endpoint_intf0->bEndpointAddress), 2278 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2279 usb_rx_callback_intf0, ictx, 2280 ictx->rx_endpoint_intf0->bInterval); 2281 2282 ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL); 2283 if (ret) { 2284 pr_err("usb_submit_urb failed for intf0 (%d)\n", ret); 2285 goto urb_submit_failed; 2286 } 2287 2288 ictx->idev = imon_init_idev(ictx); 2289 if (!ictx->idev) { 2290 dev_err(dev, "%s: input device setup failed\n", __func__); 2291 goto idev_setup_failed; 2292 } 2293 2294 ictx->rdev = imon_init_rdev(ictx); 2295 if (!ictx->rdev) { 2296 dev_err(dev, "%s: rc device setup failed\n", __func__); 2297 goto rdev_setup_failed; 2298 } 2299 2300 ictx->dev_present_intf0 = true; 2301 2302 mutex_unlock(&ictx->lock); 2303 return ictx; 2304 2305rdev_setup_failed: 2306 input_unregister_device(ictx->idev); 2307idev_setup_failed: 2308 usb_kill_urb(ictx->rx_urb_intf0); 2309urb_submit_failed: 2310find_endpoint_failed: 2311 usb_put_dev(ictx->usbdev_intf0); 2312 mutex_unlock(&ictx->lock); 2313 usb_free_urb(tx_urb); 2314tx_urb_alloc_failed: 2315 usb_free_urb(rx_urb); 2316rx_urb_alloc_failed: 2317 kfree(ictx); 2318exit: 2319 dev_err(dev, "unable to initialize intf0, err %d\n", ret); 2320 2321 return NULL; 2322} 2323 2324static struct imon_context *imon_init_intf1(struct usb_interface *intf, 2325 struct imon_context *ictx) 2326{ 2327 struct urb *rx_urb; 2328 struct usb_host_interface *iface_desc; 2329 int ret = -ENOMEM; 2330 2331 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 2332 if (!rx_urb) 2333 goto rx_urb_alloc_failed; 2334 2335 mutex_lock(&ictx->lock); 2336 2337 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2338 timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0); 2339 } 2340 2341 ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf)); 2342 ictx->rx_urb_intf1 = rx_urb; 2343 2344 ret = -ENODEV; 2345 iface_desc = intf->cur_altsetting; 2346 if (!imon_find_endpoints(ictx, iface_desc)) 2347 goto find_endpoint_failed; 2348 2349 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2350 ictx->touch = imon_init_touch(ictx); 2351 if (!ictx->touch) 2352 goto touch_setup_failed; 2353 } else 2354 ictx->touch = NULL; 2355 2356 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2357 usb_rcvintpipe(ictx->usbdev_intf1, 2358 ictx->rx_endpoint_intf1->bEndpointAddress), 2359 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2360 usb_rx_callback_intf1, ictx, 2361 ictx->rx_endpoint_intf1->bInterval); 2362 2363 ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL); 2364 2365 if (ret) { 2366 pr_err("usb_submit_urb failed for intf1 (%d)\n", ret); 2367 goto urb_submit_failed; 2368 } 2369 2370 ictx->dev_present_intf1 = true; 2371 2372 mutex_unlock(&ictx->lock); 2373 return ictx; 2374 2375urb_submit_failed: 2376 if (ictx->touch) 2377 input_unregister_device(ictx->touch); 2378touch_setup_failed: 2379find_endpoint_failed: 2380 usb_put_dev(ictx->usbdev_intf1); 2381 ictx->usbdev_intf1 = NULL; 2382 mutex_unlock(&ictx->lock); 2383 usb_free_urb(rx_urb); 2384 ictx->rx_urb_intf1 = NULL; 2385rx_urb_alloc_failed: 2386 dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret); 2387 2388 return NULL; 2389} 2390 2391static void imon_init_display(struct imon_context *ictx, 2392 struct usb_interface *intf) 2393{ 2394 int ret; 2395 2396 dev_dbg(ictx->dev, "Registering iMON display with sysfs\n"); 2397 2398 /* set up sysfs entry for built-in clock */ 2399 ret = sysfs_create_group(&intf->dev.kobj, &imon_display_attr_group); 2400 if (ret) 2401 dev_err(ictx->dev, "Could not create display sysfs entries(%d)", 2402 ret); 2403 2404 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2405 ret = usb_register_dev(intf, &imon_lcd_class); 2406 else 2407 ret = usb_register_dev(intf, &imon_vfd_class); 2408 if (ret) 2409 /* Not a fatal error, so ignore */ 2410 dev_info(ictx->dev, "could not get a minor number for display\n"); 2411 2412} 2413 2414/* 2415 * Callback function for USB core API: Probe 2416 */ 2417static int imon_probe(struct usb_interface *interface, 2418 const struct usb_device_id *id) 2419{ 2420 struct usb_device *usbdev = NULL; 2421 struct usb_host_interface *iface_desc = NULL; 2422 struct usb_interface *first_if; 2423 struct device *dev = &interface->dev; 2424 int ifnum, sysfs_err; 2425 int ret = 0; 2426 struct imon_context *ictx = NULL; 2427 u16 vendor, product; 2428 2429 usbdev = usb_get_dev(interface_to_usbdev(interface)); 2430 iface_desc = interface->cur_altsetting; 2431 ifnum = iface_desc->desc.bInterfaceNumber; 2432 vendor = le16_to_cpu(usbdev->descriptor.idVendor); 2433 product = le16_to_cpu(usbdev->descriptor.idProduct); 2434 2435 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n", 2436 __func__, vendor, product, ifnum); 2437 2438 first_if = usb_ifnum_to_if(usbdev, 0); 2439 if (!first_if) { 2440 ret = -ENODEV; 2441 goto fail; 2442 } 2443 2444 if (first_if->dev.driver != interface->dev.driver) { 2445 dev_err(&interface->dev, "inconsistent driver matching\n"); 2446 ret = -EINVAL; 2447 goto fail; 2448 } 2449 2450 if (ifnum == 0) { 2451 ictx = imon_init_intf0(interface, id); 2452 if (!ictx) { 2453 pr_err("failed to initialize context!\n"); 2454 ret = -ENODEV; 2455 goto fail; 2456 } 2457 refcount_set(&ictx->users, 1); 2458 2459 } else { 2460 /* this is the secondary interface on the device */ 2461 struct imon_context *first_if_ctx = usb_get_intfdata(first_if); 2462 2463 /* fail early if first intf failed to register */ 2464 if (!first_if_ctx) { 2465 ret = -ENODEV; 2466 goto fail; 2467 } 2468 2469 ictx = imon_init_intf1(interface, first_if_ctx); 2470 if (!ictx) { 2471 pr_err("failed to attach to context!\n"); 2472 ret = -ENODEV; 2473 goto fail; 2474 } 2475 refcount_inc(&ictx->users); 2476 2477 } 2478 2479 usb_set_intfdata(interface, ictx); 2480 2481 if (ifnum == 0) { 2482 if (product == 0xffdc && ictx->rf_device) { 2483 sysfs_err = sysfs_create_group(&interface->dev.kobj, 2484 &imon_rf_attr_group); 2485 if (sysfs_err) 2486 pr_err("Could not create RF sysfs entries(%d)\n", 2487 sysfs_err); 2488 } 2489 2490 if (ictx->display_supported) 2491 imon_init_display(ictx, interface); 2492 } 2493 2494 dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n", 2495 vendor, product, ifnum, 2496 usbdev->bus->busnum, usbdev->devnum); 2497 2498 usb_put_dev(usbdev); 2499 2500 return 0; 2501 2502fail: 2503 usb_put_dev(usbdev); 2504 dev_err(dev, "unable to register, err %d\n", ret); 2505 2506 return ret; 2507} 2508 2509/* 2510 * Callback function for USB core API: disconnect 2511 */ 2512static void imon_disconnect(struct usb_interface *interface) 2513{ 2514 struct imon_context *ictx; 2515 struct device *dev; 2516 int ifnum; 2517 2518 ictx = usb_get_intfdata(interface); 2519 2520 mutex_lock(&ictx->lock); 2521 ictx->disconnected = true; 2522 mutex_unlock(&ictx->lock); 2523 2524 dev = ictx->dev; 2525 ifnum = interface->cur_altsetting->desc.bInterfaceNumber; 2526 2527 /* 2528 * sysfs_remove_group is safe to call even if sysfs_create_group 2529 * hasn't been called 2530 */ 2531 sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group); 2532 sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group); 2533 2534 usb_set_intfdata(interface, NULL); 2535 2536 /* Abort ongoing write */ 2537 if (ictx->tx.busy) { 2538 usb_kill_urb(ictx->tx_urb); 2539 complete(&ictx->tx.finished); 2540 } 2541 2542 if (ifnum == 0) { 2543 ictx->dev_present_intf0 = false; 2544 usb_kill_urb(ictx->rx_urb_intf0); 2545 input_unregister_device(ictx->idev); 2546 rc_unregister_device(ictx->rdev); 2547 if (ictx->display_supported) { 2548 if (ictx->display_type == IMON_DISPLAY_TYPE_LCD) 2549 usb_deregister_dev(interface, &imon_lcd_class); 2550 else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD) 2551 usb_deregister_dev(interface, &imon_vfd_class); 2552 } 2553 usb_put_dev(ictx->usbdev_intf0); 2554 } else { 2555 ictx->dev_present_intf1 = false; 2556 usb_kill_urb(ictx->rx_urb_intf1); 2557 if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { 2558 timer_delete_sync(&ictx->ttimer); 2559 input_unregister_device(ictx->touch); 2560 } 2561 usb_put_dev(ictx->usbdev_intf1); 2562 } 2563 2564 if (refcount_dec_and_test(&ictx->users)) 2565 free_imon_context(ictx); 2566 2567 dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n", 2568 __func__, ifnum); 2569} 2570 2571static int imon_suspend(struct usb_interface *intf, pm_message_t message) 2572{ 2573 struct imon_context *ictx = usb_get_intfdata(intf); 2574 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2575 2576 if (ifnum == 0) 2577 usb_kill_urb(ictx->rx_urb_intf0); 2578 else 2579 usb_kill_urb(ictx->rx_urb_intf1); 2580 2581 return 0; 2582} 2583 2584static int imon_resume(struct usb_interface *intf) 2585{ 2586 int rc = 0; 2587 struct imon_context *ictx = usb_get_intfdata(intf); 2588 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber; 2589 2590 if (ifnum == 0) { 2591 usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0, 2592 usb_rcvintpipe(ictx->usbdev_intf0, 2593 ictx->rx_endpoint_intf0->bEndpointAddress), 2594 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2595 usb_rx_callback_intf0, ictx, 2596 ictx->rx_endpoint_intf0->bInterval); 2597 2598 rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_NOIO); 2599 2600 } else { 2601 usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1, 2602 usb_rcvintpipe(ictx->usbdev_intf1, 2603 ictx->rx_endpoint_intf1->bEndpointAddress), 2604 ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf), 2605 usb_rx_callback_intf1, ictx, 2606 ictx->rx_endpoint_intf1->bInterval); 2607 2608 rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_NOIO); 2609 } 2610 2611 return rc; 2612} 2613 2614module_usb_driver(imon_driver);
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