In practice, it is being hard to distinguish when a patch should go to staging tree or to the media tree. Better to distinguish it, by putting the media drivers at a separate staging directory. Newer staging drivers that include anything with "dvb*.h", "v4l2*.h" or "videodev2.h" should go to the drivers/staging/media tree.
Showing the changes to drivers/staging/media/lirc/lirc_imon.c (1 of 83 files). Show all
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| 1 | +/* | |
| 2 | + * lirc_imon.c: LIRC/VFD/LCD driver for SoundGraph iMON IR/VFD/LCD | |
| 3 | + * including the iMON PAD model | |
| 4 | + * | |
| 5 | + * Copyright(C) 2004 Venky Raju(dev@venky.ws) | |
| 6 | + * Copyright(C) 2009 Jarod Wilson <jarod@wilsonet.com> | |
| 7 | + * | |
| 8 | + * lirc_imon is free software; you can redistribute it and/or modify | |
| 9 | + * it under the terms of the GNU General Public License as published by | |
| 10 | + * the Free Software Foundation; either version 2 of the License, or | |
| 11 | + * (at your option) any later version. | |
| 12 | + * | |
| 13 | + * This program is distributed in the hope that it will be useful, | |
| 14 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | + * GNU General Public License for more details. | |
| 17 | + * | |
| 18 | + * You should have received a copy of the GNU General Public License | |
| 19 | + * along with this program; if not, write to the Free Software | |
| 20 | + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 21 | + */ | |
| 22 | + | |
| 23 | +#include <linux/errno.h> | |
| 24 | +#include <linux/init.h> | |
| 25 | +#include <linux/kernel.h> | |
| 26 | +#include <linux/module.h> | |
| 27 | +#include <linux/slab.h> | |
| 28 | +#include <linux/uaccess.h> | |
| 29 | +#include <linux/usb.h> | |
| 30 | + | |
| 31 | +#include <media/lirc.h> | |
| 32 | +#include <media/lirc_dev.h> | |
| 33 | + | |
| 34 | + | |
| 35 | +#define MOD_AUTHOR "Venky Raju <dev@venky.ws>" | |
| 36 | +#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display" | |
| 37 | +#define MOD_NAME "lirc_imon" | |
| 38 | +#define MOD_VERSION "0.8" | |
| 39 | + | |
| 40 | +#define DISPLAY_MINOR_BASE 144 | |
| 41 | +#define DEVICE_NAME "lcd%d" | |
| 42 | + | |
| 43 | +#define BUF_CHUNK_SIZE 4 | |
| 44 | +#define BUF_SIZE 128 | |
| 45 | + | |
| 46 | +#define BIT_DURATION 250 /* each bit received is 250us */ | |
| 47 | + | |
| 48 | +/*** P R O T O T Y P E S ***/ | |
| 49 | + | |
| 50 | +/* USB Callback prototypes */ | |
| 51 | +static int imon_probe(struct usb_interface *interface, | |
| 52 | + const struct usb_device_id *id); | |
| 53 | +static void imon_disconnect(struct usb_interface *interface); | |
| 54 | +static void usb_rx_callback(struct urb *urb); | |
| 55 | +static void usb_tx_callback(struct urb *urb); | |
| 56 | + | |
| 57 | +/* suspend/resume support */ | |
| 58 | +static int imon_resume(struct usb_interface *intf); | |
| 59 | +static int imon_suspend(struct usb_interface *intf, pm_message_t message); | |
| 60 | + | |
| 61 | +/* Display file_operations function prototypes */ | |
| 62 | +static int display_open(struct inode *inode, struct file *file); | |
| 63 | +static int display_close(struct inode *inode, struct file *file); | |
| 64 | + | |
| 65 | +/* VFD write operation */ | |
| 66 | +static ssize_t vfd_write(struct file *file, const char *buf, | |
| 67 | + size_t n_bytes, loff_t *pos); | |
| 68 | + | |
| 69 | +/* LIRC driver function prototypes */ | |
| 70 | +static int ir_open(void *data); | |
| 71 | +static void ir_close(void *data); | |
| 72 | + | |
| 73 | +/* Driver init/exit prototypes */ | |
| 74 | +static int __init imon_init(void); | |
| 75 | +static void __exit imon_exit(void); | |
| 76 | + | |
| 77 | +/*** G L O B A L S ***/ | |
| 78 | +#define IMON_DATA_BUF_SZ 35 | |
| 79 | + | |
| 80 | +struct imon_context { | |
| 81 | + struct usb_device *usbdev; | |
| 82 | + /* Newer devices have two interfaces */ | |
| 83 | + int display; /* not all controllers do */ | |
| 84 | + int display_isopen; /* display port has been opened */ | |
| 85 | + int ir_isopen; /* IR port open */ | |
| 86 | + int dev_present; /* USB device presence */ | |
| 87 | + struct mutex ctx_lock; /* to lock this object */ | |
| 88 | + wait_queue_head_t remove_ok; /* For unexpected USB disconnects */ | |
| 89 | + | |
| 90 | + int vfd_proto_6p; /* some VFD require a 6th packet */ | |
| 91 | + | |
| 92 | + struct lirc_driver *driver; | |
| 93 | + struct usb_endpoint_descriptor *rx_endpoint; | |
| 94 | + struct usb_endpoint_descriptor *tx_endpoint; | |
| 95 | + struct urb *rx_urb; | |
| 96 | + struct urb *tx_urb; | |
| 97 | + unsigned char usb_rx_buf[8]; | |
| 98 | + unsigned char usb_tx_buf[8]; | |
| 99 | + | |
| 100 | + struct rx_data { | |
| 101 | + int count; /* length of 0 or 1 sequence */ | |
| 102 | + int prev_bit; /* logic level of sequence */ | |
| 103 | + int initial_space; /* initial space flag */ | |
| 104 | + } rx; | |
| 105 | + | |
| 106 | + struct tx_t { | |
| 107 | + unsigned char data_buf[IMON_DATA_BUF_SZ]; /* user data buffer */ | |
| 108 | + struct completion finished; /* wait for write to finish */ | |
| 109 | + atomic_t busy; /* write in progress */ | |
| 110 | + int status; /* status of tx completion */ | |
| 111 | + } tx; | |
| 112 | +}; | |
| 113 | + | |
| 114 | +static const struct file_operations display_fops = { | |
| 115 | + .owner = THIS_MODULE, | |
| 116 | + .open = &display_open, | |
| 117 | + .write = &vfd_write, | |
| 118 | + .release = &display_close, | |
| 119 | + .llseek = noop_llseek, | |
| 120 | +}; | |
| 121 | + | |
| 122 | +/* | |
| 123 | + * USB Device ID for iMON USB Control Boards | |
| 124 | + * | |
| 125 | + * The Windows drivers contain 6 different inf files, more or less one for | |
| 126 | + * each new device until the 0x0034-0x0046 devices, which all use the same | |
| 127 | + * driver. Some of the devices in the 34-46 range haven't been definitively | |
| 128 | + * identified yet. Early devices have either a TriGem Computer, Inc. or a | |
| 129 | + * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later | |
| 130 | + * devices use the SoundGraph vendor ID (0x15c2). | |
| 131 | + */ | |
| 132 | +static struct usb_device_id imon_usb_id_table[] = { | |
| 133 | + /* TriGem iMON (IR only) -- TG_iMON.inf */ | |
| 134 | + { USB_DEVICE(0x0aa8, 0x8001) }, | |
| 135 | + | |
| 136 | + /* SoundGraph iMON (IR only) -- sg_imon.inf */ | |
| 137 | + { USB_DEVICE(0x04e8, 0xff30) }, | |
| 138 | + | |
| 139 | + /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */ | |
| 140 | + { USB_DEVICE(0x0aa8, 0xffda) }, | |
| 141 | + | |
| 142 | + /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */ | |
| 143 | + { USB_DEVICE(0x15c2, 0xffda) }, | |
| 144 | + | |
| 145 | + {} | |
| 146 | +}; | |
| 147 | + | |
| 148 | +/* Some iMON VFD models requires a 6th packet for VFD writes */ | |
| 149 | +static struct usb_device_id vfd_proto_6p_list[] = { | |
| 150 | + { USB_DEVICE(0x15c2, 0xffda) }, | |
| 151 | + {} | |
| 152 | +}; | |
| 153 | + | |
| 154 | +/* Some iMON devices have no lcd/vfd, don't set one up */ | |
| 155 | +static struct usb_device_id ir_only_list[] = { | |
| 156 | + { USB_DEVICE(0x0aa8, 0x8001) }, | |
| 157 | + { USB_DEVICE(0x04e8, 0xff30) }, | |
| 158 | + {} | |
| 159 | +}; | |
| 160 | + | |
| 161 | +/* USB Device data */ | |
| 162 | +static struct usb_driver imon_driver = { | |
| 163 | + .name = MOD_NAME, | |
| 164 | + .probe = imon_probe, | |
| 165 | + .disconnect = imon_disconnect, | |
| 166 | + .suspend = imon_suspend, | |
| 167 | + .resume = imon_resume, | |
| 168 | + .id_table = imon_usb_id_table, | |
| 169 | +}; | |
| 170 | + | |
| 171 | +static struct usb_class_driver imon_class = { | |
| 172 | + .name = DEVICE_NAME, | |
| 173 | + .fops = &display_fops, | |
| 174 | + .minor_base = DISPLAY_MINOR_BASE, | |
| 175 | +}; | |
| 176 | + | |
| 177 | +/* to prevent races between open() and disconnect(), probing, etc */ | |
| 178 | +static DEFINE_MUTEX(driver_lock); | |
| 179 | + | |
| 180 | +static int debug; | |
| 181 | + | |
| 182 | +/*** M O D U L E C O D E ***/ | |
| 183 | + | |
| 184 | +MODULE_AUTHOR(MOD_AUTHOR); | |
| 185 | +MODULE_DESCRIPTION(MOD_DESC); | |
| 186 | +MODULE_VERSION(MOD_VERSION); | |
| 187 | +MODULE_LICENSE("GPL"); | |
| 188 | +MODULE_DEVICE_TABLE(usb, imon_usb_id_table); | |
| 189 | +module_param(debug, int, S_IRUGO | S_IWUSR); | |
| 190 | +MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)"); | |
| 191 | + | |
| 192 | +static void free_imon_context(struct imon_context *context) | |
| 193 | +{ | |
| 194 | + struct device *dev = context->driver->dev; | |
| 195 | + usb_free_urb(context->tx_urb); | |
| 196 | + usb_free_urb(context->rx_urb); | |
| 197 | + lirc_buffer_free(context->driver->rbuf); | |
| 198 | + kfree(context->driver->rbuf); | |
| 199 | + kfree(context->driver); | |
| 200 | + kfree(context); | |
| 201 | + | |
| 202 | + dev_dbg(dev, "%s: iMON context freed\n", __func__); | |
| 203 | +} | |
| 204 | + | |
| 205 | +static void deregister_from_lirc(struct imon_context *context) | |
| 206 | +{ | |
| 207 | + int retval; | |
| 208 | + int minor = context->driver->minor; | |
| 209 | + | |
| 210 | + retval = lirc_unregister_driver(minor); | |
| 211 | + if (retval) | |
| 212 | + err("%s: unable to deregister from lirc(%d)", | |
| 213 | + __func__, retval); | |
| 214 | + else | |
| 215 | + printk(KERN_INFO MOD_NAME ": Deregistered iMON driver " | |
| 216 | + "(minor:%d)\n", minor); | |
| 217 | + | |
| 218 | +} | |
| 219 | + | |
| 220 | +/** | |
| 221 | + * Called when the Display device (e.g. /dev/lcd0) | |
| 222 | + * is opened by the application. | |
| 223 | + */ | |
| 224 | +static int display_open(struct inode *inode, struct file *file) | |
| 225 | +{ | |
| 226 | + struct usb_interface *interface; | |
| 227 | + struct imon_context *context = NULL; | |
| 228 | + int subminor; | |
| 229 | + int retval = 0; | |
| 230 | + | |
| 231 | + /* prevent races with disconnect */ | |
| 232 | + mutex_lock(&driver_lock); | |
| 233 | + | |
| 234 | + subminor = iminor(inode); | |
| 235 | + interface = usb_find_interface(&imon_driver, subminor); | |
| 236 | + if (!interface) { | |
| 237 | + err("%s: could not find interface for minor %d", | |
| 238 | + __func__, subminor); | |
| 239 | + retval = -ENODEV; | |
| 240 | + goto exit; | |
| 241 | + } | |
| 242 | + context = usb_get_intfdata(interface); | |
| 243 | + | |
| 244 | + if (!context) { | |
| 245 | + err("%s: no context found for minor %d", | |
| 246 | + __func__, subminor); | |
| 247 | + retval = -ENODEV; | |
| 248 | + goto exit; | |
| 249 | + } | |
| 250 | + | |
| 251 | + mutex_lock(&context->ctx_lock); | |
| 252 | + | |
| 253 | + if (!context->display) { | |
| 254 | + err("%s: display not supported by device", __func__); | |
| 255 | + retval = -ENODEV; | |
| 256 | + } else if (context->display_isopen) { | |
| 257 | + err("%s: display port is already open", __func__); | |
| 258 | + retval = -EBUSY; | |
| 259 | + } else { | |
| 260 | + context->display_isopen = 1; | |
| 261 | + file->private_data = context; | |
| 262 | + dev_info(context->driver->dev, "display port opened\n"); | |
| 263 | + } | |
| 264 | + | |
| 265 | + mutex_unlock(&context->ctx_lock); | |
| 266 | + | |
| 267 | +exit: | |
| 268 | + mutex_unlock(&driver_lock); | |
| 269 | + return retval; | |
| 270 | +} | |
| 271 | + | |
| 272 | +/** | |
| 273 | + * Called when the display device (e.g. /dev/lcd0) | |
| 274 | + * is closed by the application. | |
| 275 | + */ | |
| 276 | +static int display_close(struct inode *inode, struct file *file) | |
| 277 | +{ | |
| 278 | + struct imon_context *context = NULL; | |
| 279 | + int retval = 0; | |
| 280 | + | |
| 281 | + context = file->private_data; | |
| 282 | + | |
| 283 | + if (!context) { | |
| 284 | + err("%s: no context for device", __func__); | |
| 285 | + return -ENODEV; | |
| 286 | + } | |
| 287 | + | |
| 288 | + mutex_lock(&context->ctx_lock); | |
| 289 | + | |
| 290 | + if (!context->display) { | |
| 291 | + err("%s: display not supported by device", __func__); | |
| 292 | + retval = -ENODEV; | |
| 293 | + } else if (!context->display_isopen) { | |
| 294 | + err("%s: display is not open", __func__); | |
| 295 | + retval = -EIO; | |
| 296 | + } else { | |
| 297 | + context->display_isopen = 0; | |
| 298 | + dev_info(context->driver->dev, "display port closed\n"); | |
| 299 | + if (!context->dev_present && !context->ir_isopen) { | |
| 300 | + /* | |
| 301 | + * Device disconnected before close and IR port is not | |
| 302 | + * open. If IR port is open, context will be deleted by | |
| 303 | + * ir_close. | |
| 304 | + */ | |
| 305 | + mutex_unlock(&context->ctx_lock); | |
| 306 | + free_imon_context(context); | |
| 307 | + return retval; | |
| 308 | + } | |
| 309 | + } | |
| 310 | + | |
| 311 | + mutex_unlock(&context->ctx_lock); | |
| 312 | + return retval; | |
| 313 | +} | |
| 314 | + | |
| 315 | +/** | |
| 316 | + * Sends a packet to the device -- this function must be called | |
| 317 | + * with context->ctx_lock held. | |
| 318 | + */ | |
| 319 | +static int send_packet(struct imon_context *context) | |
| 320 | +{ | |
| 321 | + unsigned int pipe; | |
| 322 | + int interval = 0; | |
| 323 | + int retval = 0; | |
| 324 | + | |
| 325 | + /* Check if we need to use control or interrupt urb */ | |
| 326 | + pipe = usb_sndintpipe(context->usbdev, | |
| 327 | + context->tx_endpoint->bEndpointAddress); | |
| 328 | + interval = context->tx_endpoint->bInterval; | |
| 329 | + | |
| 330 | + usb_fill_int_urb(context->tx_urb, context->usbdev, pipe, | |
| 331 | + context->usb_tx_buf, | |
| 332 | + sizeof(context->usb_tx_buf), | |
| 333 | + usb_tx_callback, context, interval); | |
| 334 | + | |
| 335 | + context->tx_urb->actual_length = 0; | |
| 336 | + | |
| 337 | + init_completion(&context->tx.finished); | |
| 338 | + atomic_set(&(context->tx.busy), 1); | |
| 339 | + | |
| 340 | + retval = usb_submit_urb(context->tx_urb, GFP_KERNEL); | |
| 341 | + if (retval) { | |
| 342 | + atomic_set(&(context->tx.busy), 0); | |
| 343 | + err("%s: error submitting urb(%d)", __func__, retval); | |
| 344 | + } else { | |
| 345 | + /* Wait for transmission to complete (or abort) */ | |
| 346 | + mutex_unlock(&context->ctx_lock); | |
| 347 | + retval = wait_for_completion_interruptible( | |
| 348 | + &context->tx.finished); | |
| 349 | + if (retval) | |
| 350 | + err("%s: task interrupted", __func__); | |
| 351 | + mutex_lock(&context->ctx_lock); | |
| 352 | + | |
| 353 | + retval = context->tx.status; | |
| 354 | + if (retval) | |
| 355 | + err("%s: packet tx failed (%d)", __func__, retval); | |
| 356 | + } | |
| 357 | + | |
| 358 | + return retval; | |
| 359 | +} | |
| 360 | + | |
| 361 | +/** | |
| 362 | + * Writes data to the VFD. The iMON VFD is 2x16 characters | |
| 363 | + * and requires data in 5 consecutive USB interrupt packets, | |
| 364 | + * each packet but the last carrying 7 bytes. | |
| 365 | + * | |
| 366 | + * I don't know if the VFD board supports features such as | |
| 367 | + * scrolling, clearing rows, blanking, etc. so at | |
| 368 | + * the caller must provide a full screen of data. If fewer | |
| 369 | + * than 32 bytes are provided spaces will be appended to | |
| 370 | + * generate a full screen. | |
| 371 | + */ | |
| 372 | +static ssize_t vfd_write(struct file *file, const char *buf, | |
| 373 | + size_t n_bytes, loff_t *pos) | |
| 374 | +{ | |
| 375 | + int i; | |
| 376 | + int offset; | |
| 377 | + int seq; | |
| 378 | + int retval = 0; | |
| 379 | + struct imon_context *context; | |
| 380 | + const unsigned char vfd_packet6[] = { | |
| 381 | + 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; | |
| 382 | + int *data_buf = NULL; | |
| 383 | + | |
| 384 | + context = file->private_data; | |
| 385 | + if (!context) { | |
| 386 | + err("%s: no context for device", __func__); | |
| 387 | + return -ENODEV; | |
| 388 | + } | |
| 389 | + | |
| 390 | + mutex_lock(&context->ctx_lock); | |
| 391 | + | |
| 392 | + if (!context->dev_present) { | |
| 393 | + err("%s: no iMON device present", __func__); | |
| 394 | + retval = -ENODEV; | |
| 395 | + goto exit; | |
| 396 | + } | |
| 397 | + | |
| 398 | + if (n_bytes <= 0 || n_bytes > IMON_DATA_BUF_SZ - 3) { | |
| 399 | + err("%s: invalid payload size", __func__); | |
| 400 | + retval = -EINVAL; | |
| 401 | + goto exit; | |
| 402 | + } | |
| 403 | + | |
| 404 | + data_buf = memdup_user(buf, n_bytes); | |
| 405 | + if (IS_ERR(data_buf)) { | |
| 406 | + retval = PTR_ERR(data_buf); | |
| 407 | + goto exit; | |
| 408 | + } | |
| 409 | + | |
| 410 | + memcpy(context->tx.data_buf, data_buf, n_bytes); | |
| 411 | + | |
| 412 | + /* Pad with spaces */ | |
| 413 | + for (i = n_bytes; i < IMON_DATA_BUF_SZ - 3; ++i) | |
| 414 | + context->tx.data_buf[i] = ' '; | |
| 415 | + | |
| 416 | + for (i = IMON_DATA_BUF_SZ - 3; i < IMON_DATA_BUF_SZ; ++i) | |
| 417 | + context->tx.data_buf[i] = 0xFF; | |
| 418 | + | |
| 419 | + offset = 0; | |
| 420 | + seq = 0; | |
| 421 | + | |
| 422 | + do { | |
| 423 | + memcpy(context->usb_tx_buf, context->tx.data_buf + offset, 7); | |
| 424 | + context->usb_tx_buf[7] = (unsigned char) seq; | |
| 425 | + | |
| 426 | + retval = send_packet(context); | |
| 427 | + if (retval) { | |
| 428 | + err("%s: send packet failed for packet #%d", | |
| 429 | + __func__, seq/2); | |
| 430 | + goto exit; | |
| 431 | + } else { | |
| 432 | + seq += 2; | |
| 433 | + offset += 7; | |
| 434 | + } | |
| 435 | + | |
| 436 | + } while (offset < IMON_DATA_BUF_SZ); | |
| 437 | + | |
| 438 | + if (context->vfd_proto_6p) { | |
| 439 | + /* Send packet #6 */ | |
| 440 | + memcpy(context->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); | |
| 441 | + context->usb_tx_buf[7] = (unsigned char) seq; | |
| 442 | + retval = send_packet(context); | |
| 443 | + if (retval) | |
| 444 | + err("%s: send packet failed for packet #%d", | |
| 445 | + __func__, seq/2); | |
| 446 | + } | |
| 447 | + | |
| 448 | +exit: | |
| 449 | + mutex_unlock(&context->ctx_lock); | |
| 450 | + kfree(data_buf); | |
| 451 | + | |
| 452 | + return (!retval) ? n_bytes : retval; | |
| 453 | +} | |
| 454 | + | |
| 455 | +/** | |
| 456 | + * Callback function for USB core API: transmit data | |
| 457 | + */ | |
| 458 | +static void usb_tx_callback(struct urb *urb) | |
| 459 | +{ | |
| 460 | + struct imon_context *context; | |
| 461 | + | |
| 462 | + if (!urb) | |
| 463 | + return; | |
| 464 | + context = (struct imon_context *)urb->context; | |
| 465 | + if (!context) | |
| 466 | + return; | |
| 467 | + | |
| 468 | + context->tx.status = urb->status; | |
| 469 | + | |
| 470 | + /* notify waiters that write has finished */ | |
| 471 | + atomic_set(&context->tx.busy, 0); | |
| 472 | + complete(&context->tx.finished); | |
| 473 | + | |
| 474 | + return; | |
| 475 | +} | |
| 476 | + | |
| 477 | +/** | |
| 478 | + * Called by lirc_dev when the application opens /dev/lirc | |
| 479 | + */ | |
| 480 | +static int ir_open(void *data) | |
| 481 | +{ | |
| 482 | + int retval = 0; | |
| 483 | + struct imon_context *context; | |
| 484 | + | |
| 485 | + /* prevent races with disconnect */ | |
| 486 | + mutex_lock(&driver_lock); | |
| 487 | + | |
| 488 | + context = (struct imon_context *)data; | |
| 489 | + | |
| 490 | + /* initial IR protocol decode variables */ | |
| 491 | + context->rx.count = 0; | |
| 492 | + context->rx.initial_space = 1; | |
| 493 | + context->rx.prev_bit = 0; | |
| 494 | + | |
| 495 | + context->ir_isopen = 1; | |
| 496 | + dev_info(context->driver->dev, "IR port opened\n"); | |
| 497 | + | |
| 498 | + mutex_unlock(&driver_lock); | |
| 499 | + return retval; | |
| 500 | +} | |
| 501 | + | |
| 502 | +/** | |
| 503 | + * Called by lirc_dev when the application closes /dev/lirc | |
| 504 | + */ | |
| 505 | +static void ir_close(void *data) | |
| 506 | +{ | |
| 507 | + struct imon_context *context; | |
| 508 | + | |
| 509 | + context = (struct imon_context *)data; | |
| 510 | + if (!context) { | |
| 511 | + err("%s: no context for device", __func__); | |
| 512 | + return; | |
| 513 | + } | |
| 514 | + | |
| 515 | + mutex_lock(&context->ctx_lock); | |
| 516 | + | |
| 517 | + context->ir_isopen = 0; | |
| 518 | + dev_info(context->driver->dev, "IR port closed\n"); | |
| 519 | + | |
| 520 | + if (!context->dev_present) { | |
| 521 | + /* | |
| 522 | + * Device disconnected while IR port was still open. Driver | |
| 523 | + * was not deregistered at disconnect time, so do it now. | |
| 524 | + */ | |
| 525 | + deregister_from_lirc(context); | |
| 526 | + | |
| 527 | + if (!context->display_isopen) { | |
| 528 | + mutex_unlock(&context->ctx_lock); | |
| 529 | + free_imon_context(context); | |
| 530 | + return; | |
| 531 | + } | |
| 532 | + /* | |
| 533 | + * If display port is open, context will be deleted by | |
| 534 | + * display_close | |
| 535 | + */ | |
| 536 | + } | |
| 537 | + | |
| 538 | + mutex_unlock(&context->ctx_lock); | |
| 539 | + return; | |
| 540 | +} | |
| 541 | + | |
| 542 | +/** | |
| 543 | + * Convert bit count to time duration (in us) and submit | |
| 544 | + * the value to lirc_dev. | |
| 545 | + */ | |
| 546 | +static void submit_data(struct imon_context *context) | |
| 547 | +{ | |
| 548 | + unsigned char buf[4]; | |
| 549 | + int value = context->rx.count; | |
| 550 | + int i; | |
| 551 | + | |
| 552 | + dev_dbg(context->driver->dev, "submitting data to LIRC\n"); | |
| 553 | + | |
| 554 | + value *= BIT_DURATION; | |
| 555 | + value &= PULSE_MASK; | |
| 556 | + if (context->rx.prev_bit) | |
| 557 | + value |= PULSE_BIT; | |
| 558 | + | |
| 559 | + for (i = 0; i < 4; ++i) | |
| 560 | + buf[i] = value>>(i*8); | |
| 561 | + | |
| 562 | + lirc_buffer_write(context->driver->rbuf, buf); | |
| 563 | + wake_up(&context->driver->rbuf->wait_poll); | |
| 564 | + return; | |
| 565 | +} | |
| 566 | + | |
| 567 | +static inline int tv2int(const struct timeval *a, const struct timeval *b) | |
| 568 | +{ | |
| 569 | + int usecs = 0; | |
| 570 | + int sec = 0; | |
| 571 | + | |
| 572 | + if (b->tv_usec > a->tv_usec) { | |
| 573 | + usecs = 1000000; | |
| 574 | + sec--; | |
| 575 | + } | |
| 576 | + | |
| 577 | + usecs += a->tv_usec - b->tv_usec; | |
| 578 | + | |
| 579 | + sec += a->tv_sec - b->tv_sec; | |
| 580 | + sec *= 1000; | |
| 581 | + usecs /= 1000; | |
| 582 | + sec += usecs; | |
| 583 | + | |
| 584 | + if (sec < 0) | |
| 585 | + sec = 1000; | |
| 586 | + | |
| 587 | + return sec; | |
| 588 | +} | |
| 589 | + | |
| 590 | +/** | |
| 591 | + * Process the incoming packet | |
| 592 | + */ | |
| 593 | +static void imon_incoming_packet(struct imon_context *context, | |
| 594 | + struct urb *urb, int intf) | |
| 595 | +{ | |
| 596 | + int len = urb->actual_length; | |
| 597 | + unsigned char *buf = urb->transfer_buffer; | |
| 598 | + struct device *dev = context->driver->dev; | |
| 599 | + int octet, bit; | |
| 600 | + unsigned char mask; | |
| 601 | + int i; | |
| 602 | + | |
| 603 | + /* | |
| 604 | + * just bail out if no listening IR client | |
| 605 | + */ | |
| 606 | + if (!context->ir_isopen) | |
| 607 | + return; | |
| 608 | + | |
| 609 | + if (len != 8) { | |
| 610 | + dev_warn(dev, "imon %s: invalid incoming packet " | |
| 611 | + "size (len = %d, intf%d)\n", __func__, len, intf); | |
| 612 | + return; | |
| 613 | + } | |
| 614 | + | |
| 615 | + if (debug) { | |
| 616 | + printk(KERN_INFO "raw packet: "); | |
| 617 | + for (i = 0; i < len; ++i) | |
| 618 | + printk("%02x ", buf[i]); | |
| 619 | + printk("\n"); | |
| 620 | + } | |
| 621 | + | |
| 622 | + /* | |
| 623 | + * Translate received data to pulse and space lengths. | |
| 624 | + * Received data is active low, i.e. pulses are 0 and | |
| 625 | + * spaces are 1. | |
| 626 | + * | |
| 627 | + * My original algorithm was essentially similar to | |
| 628 | + * Changwoo Ryu's with the exception that he switched | |
| 629 | + * the incoming bits to active high and also fed an | |
| 630 | + * initial space to LIRC at the start of a new sequence | |
| 631 | + * if the previous bit was a pulse. | |
| 632 | + * | |
| 633 | + * I've decided to adopt his algorithm. | |
| 634 | + */ | |
| 635 | + | |
| 636 | + if (buf[7] == 1 && context->rx.initial_space) { | |
| 637 | + /* LIRC requires a leading space */ | |
| 638 | + context->rx.prev_bit = 0; | |
| 639 | + context->rx.count = 4; | |
| 640 | + submit_data(context); | |
| 641 | + context->rx.count = 0; | |
| 642 | + } | |
| 643 | + | |
| 644 | + for (octet = 0; octet < 5; ++octet) { | |
| 645 | + mask = 0x80; | |
| 646 | + for (bit = 0; bit < 8; ++bit) { | |
| 647 | + int curr_bit = !(buf[octet] & mask); | |
| 648 | + if (curr_bit != context->rx.prev_bit) { | |
| 649 | + if (context->rx.count) { | |
| 650 | + submit_data(context); | |
| 651 | + context->rx.count = 0; | |
| 652 | + } | |
| 653 | + context->rx.prev_bit = curr_bit; | |
| 654 | + } | |
| 655 | + ++context->rx.count; | |
| 656 | + mask >>= 1; | |
| 657 | + } | |
| 658 | + } | |
| 659 | + | |
| 660 | + if (buf[7] == 10) { | |
| 661 | + if (context->rx.count) { | |
| 662 | + submit_data(context); | |
| 663 | + context->rx.count = 0; | |
| 664 | + } | |
| 665 | + context->rx.initial_space = context->rx.prev_bit; | |
| 666 | + } | |
| 667 | +} | |
| 668 | + | |
| 669 | +/** | |
| 670 | + * Callback function for USB core API: receive data | |
| 671 | + */ | |
| 672 | +static void usb_rx_callback(struct urb *urb) | |
| 673 | +{ | |
| 674 | + struct imon_context *context; | |
| 675 | + int intfnum = 0; | |
| 676 | + | |
| 677 | + if (!urb) | |
| 678 | + return; | |
| 679 | + | |
| 680 | + context = (struct imon_context *)urb->context; | |
| 681 | + if (!context) | |
| 682 | + return; | |
| 683 | + | |
| 684 | + switch (urb->status) { | |
| 685 | + case -ENOENT: /* usbcore unlink successful! */ | |
| 686 | + return; | |
| 687 | + | |
| 688 | + case 0: | |
| 689 | + imon_incoming_packet(context, urb, intfnum); | |
| 690 | + break; | |
| 691 | + | |
| 692 | + default: | |
| 693 | + dev_warn(context->driver->dev, "imon %s: status(%d): ignored\n", | |
| 694 | + __func__, urb->status); | |
| 695 | + break; | |
| 696 | + } | |
| 697 | + | |
| 698 | + usb_submit_urb(context->rx_urb, GFP_ATOMIC); | |
| 699 | + | |
| 700 | + return; | |
| 701 | +} | |
| 702 | + | |
| 703 | +/** | |
| 704 | + * Callback function for USB core API: Probe | |
| 705 | + */ | |
| 706 | +static int imon_probe(struct usb_interface *interface, | |
| 707 | + const struct usb_device_id *id) | |
| 708 | +{ | |
| 709 | + struct usb_device *usbdev = NULL; | |
| 710 | + struct usb_host_interface *iface_desc = NULL; | |
| 711 | + struct usb_endpoint_descriptor *rx_endpoint = NULL; | |
| 712 | + struct usb_endpoint_descriptor *tx_endpoint = NULL; | |
| 713 | + struct urb *rx_urb = NULL; | |
| 714 | + struct urb *tx_urb = NULL; | |
| 715 | + struct lirc_driver *driver = NULL; | |
| 716 | + struct lirc_buffer *rbuf = NULL; | |
| 717 | + struct device *dev = &interface->dev; | |
| 718 | + int ifnum; | |
| 719 | + int lirc_minor = 0; | |
| 720 | + int num_endpts; | |
| 721 | + int retval = 0; | |
| 722 | + int display_ep_found = 0; | |
| 723 | + int ir_ep_found = 0; | |
| 724 | + int alloc_status = 0; | |
| 725 | + int vfd_proto_6p = 0; | |
| 726 | + struct imon_context *context = NULL; | |
| 727 | + int i; | |
| 728 | + u16 vendor, product; | |
| 729 | + | |
| 730 | + /* prevent races probing devices w/multiple interfaces */ | |
| 731 | + mutex_lock(&driver_lock); | |
| 732 | + | |
| 733 | + context = kzalloc(sizeof(struct imon_context), GFP_KERNEL); | |
| 734 | + if (!context) { | |
| 735 | + err("%s: kzalloc failed for context", __func__); | |
| 736 | + alloc_status = 1; | |
| 737 | + goto alloc_status_switch; | |
| 738 | + } | |
| 739 | + | |
| 740 | + /* | |
| 741 | + * Try to auto-detect the type of display if the user hasn't set | |
| 742 | + * it by hand via the display_type modparam. Default is VFD. | |
| 743 | + */ | |
| 744 | + if (usb_match_id(interface, ir_only_list)) | |
| 745 | + context->display = 0; | |
| 746 | + else | |
| 747 | + context->display = 1; | |
| 748 | + | |
| 749 | + usbdev = usb_get_dev(interface_to_usbdev(interface)); | |
| 750 | + iface_desc = interface->cur_altsetting; | |
| 751 | + num_endpts = iface_desc->desc.bNumEndpoints; | |
| 752 | + ifnum = iface_desc->desc.bInterfaceNumber; | |
| 753 | + vendor = le16_to_cpu(usbdev->descriptor.idVendor); | |
| 754 | + product = le16_to_cpu(usbdev->descriptor.idProduct); | |
| 755 | + | |
| 756 | + dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n", | |
| 757 | + __func__, vendor, product, ifnum); | |
| 758 | + | |
| 759 | + /* | |
| 760 | + * Scan the endpoint list and set: | |
| 761 | + * first input endpoint = IR endpoint | |
| 762 | + * first output endpoint = display endpoint | |
| 763 | + */ | |
| 764 | + for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) { | |
| 765 | + struct usb_endpoint_descriptor *ep; | |
| 766 | + int ep_dir; | |
| 767 | + int ep_type; | |
| 768 | + ep = &iface_desc->endpoint[i].desc; | |
| 769 | + ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; | |
| 770 | + ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; | |
| 771 | + | |
| 772 | + if (!ir_ep_found && | |
| 773 | + ep_dir == USB_DIR_IN && | |
| 774 | + ep_type == USB_ENDPOINT_XFER_INT) { | |
| 775 | + | |
| 776 | + rx_endpoint = ep; | |
| 777 | + ir_ep_found = 1; | |
| 778 | + dev_dbg(dev, "%s: found IR endpoint\n", __func__); | |
| 779 | + | |
| 780 | + } else if (!display_ep_found && ep_dir == USB_DIR_OUT && | |
| 781 | + ep_type == USB_ENDPOINT_XFER_INT) { | |
| 782 | + tx_endpoint = ep; | |
| 783 | + display_ep_found = 1; | |
| 784 | + dev_dbg(dev, "%s: found display endpoint\n", __func__); | |
| 785 | + } | |
| 786 | + } | |
| 787 | + | |
| 788 | + /* | |
| 789 | + * Some iMON receivers have no display. Unfortunately, it seems | |
| 790 | + * that SoundGraph recycles device IDs between devices both with | |
| 791 | + * and without... :\ | |
| 792 | + */ | |
| 793 | + if (context->display == 0) { | |
| 794 | + display_ep_found = 0; | |
| 795 | + dev_dbg(dev, "%s: device has no display\n", __func__); | |
| 796 | + } | |
| 797 | + | |
| 798 | + /* Input endpoint is mandatory */ | |
| 799 | + if (!ir_ep_found) { | |
| 800 | + err("%s: no valid input (IR) endpoint found.", __func__); | |
| 801 | + retval = -ENODEV; | |
| 802 | + alloc_status = 2; | |
| 803 | + goto alloc_status_switch; | |
| 804 | + } | |
| 805 | + | |
| 806 | + /* Determine if display requires 6 packets */ | |
| 807 | + if (display_ep_found) { | |
| 808 | + if (usb_match_id(interface, vfd_proto_6p_list)) | |
| 809 | + vfd_proto_6p = 1; | |
| 810 | + | |
| 811 | + dev_dbg(dev, "%s: vfd_proto_6p: %d\n", | |
| 812 | + __func__, vfd_proto_6p); | |
| 813 | + } | |
| 814 | + | |
| 815 | + driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL); | |
| 816 | + if (!driver) { | |
| 817 | + err("%s: kzalloc failed for lirc_driver", __func__); | |
| 818 | + alloc_status = 2; | |
| 819 | + goto alloc_status_switch; | |
| 820 | + } | |
| 821 | + rbuf = kmalloc(sizeof(struct lirc_buffer), GFP_KERNEL); | |
| 822 | + if (!rbuf) { | |
| 823 | + err("%s: kmalloc failed for lirc_buffer", __func__); | |
| 824 | + alloc_status = 3; | |
| 825 | + goto alloc_status_switch; | |
| 826 | + } | |
| 827 | + if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) { | |
| 828 | + err("%s: lirc_buffer_init failed", __func__); | |
| 829 | + alloc_status = 4; | |
| 830 | + goto alloc_status_switch; | |
| 831 | + } | |
| 832 | + rx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
| 833 | + if (!rx_urb) { | |
| 834 | + err("%s: usb_alloc_urb failed for IR urb", __func__); | |
| 835 | + alloc_status = 5; | |
| 836 | + goto alloc_status_switch; | |
| 837 | + } | |
| 838 | + tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
| 839 | + if (!tx_urb) { | |
| 840 | + err("%s: usb_alloc_urb failed for display urb", | |
| 841 | + __func__); | |
| 842 | + alloc_status = 6; | |
| 843 | + goto alloc_status_switch; | |
| 844 | + } | |
| 845 | + | |
| 846 | + mutex_init(&context->ctx_lock); | |
| 847 | + context->vfd_proto_6p = vfd_proto_6p; | |
| 848 | + | |
| 849 | + strcpy(driver->name, MOD_NAME); | |
| 850 | + driver->minor = -1; | |
| 851 | + driver->code_length = BUF_CHUNK_SIZE * 8; | |
| 852 | + driver->sample_rate = 0; | |
| 853 | + driver->features = LIRC_CAN_REC_MODE2; | |
| 854 | + driver->data = context; | |
| 855 | + driver->rbuf = rbuf; | |
| 856 | + driver->set_use_inc = ir_open; | |
| 857 | + driver->set_use_dec = ir_close; | |
| 858 | + driver->dev = &interface->dev; | |
| 859 | + driver->owner = THIS_MODULE; | |
| 860 | + | |
| 861 | + mutex_lock(&context->ctx_lock); | |
| 862 | + | |
| 863 | + context->driver = driver; | |
| 864 | + /* start out in keyboard mode */ | |
| 865 | + | |
| 866 | + lirc_minor = lirc_register_driver(driver); | |
| 867 | + if (lirc_minor < 0) { | |
| 868 | + err("%s: lirc_register_driver failed", __func__); | |
| 869 | + alloc_status = 7; | |
| 870 | + goto unlock; | |
| 871 | + } else | |
| 872 | + dev_info(dev, "Registered iMON driver " | |
| 873 | + "(lirc minor: %d)\n", lirc_minor); | |
| 874 | + | |
| 875 | + /* Needed while unregistering! */ | |
| 876 | + driver->minor = lirc_minor; | |
| 877 | + | |
| 878 | + context->usbdev = usbdev; | |
| 879 | + context->dev_present = 1; | |
| 880 | + context->rx_endpoint = rx_endpoint; | |
| 881 | + context->rx_urb = rx_urb; | |
| 882 | + | |
| 883 | + /* | |
| 884 | + * tx is used to send characters to lcd/vfd, associate RF | |
| 885 | + * remotes, set IR protocol, and maybe more... | |
| 886 | + */ | |
| 887 | + context->tx_endpoint = tx_endpoint; | |
| 888 | + context->tx_urb = tx_urb; | |
| 889 | + | |
| 890 | + if (display_ep_found) | |
| 891 | + context->display = 1; | |
| 892 | + | |
| 893 | + usb_fill_int_urb(context->rx_urb, context->usbdev, | |
| 894 | + usb_rcvintpipe(context->usbdev, | |
| 895 | + context->rx_endpoint->bEndpointAddress), | |
| 896 | + context->usb_rx_buf, sizeof(context->usb_rx_buf), | |
| 897 | + usb_rx_callback, context, | |
| 898 | + context->rx_endpoint->bInterval); | |
| 899 | + | |
| 900 | + retval = usb_submit_urb(context->rx_urb, GFP_KERNEL); | |
| 901 | + | |
| 902 | + if (retval) { | |
| 903 | + err("%s: usb_submit_urb failed for intf0 (%d)", | |
| 904 | + __func__, retval); | |
| 905 | + mutex_unlock(&context->ctx_lock); | |
| 906 | + goto exit; | |
| 907 | + } | |
| 908 | + | |
| 909 | + usb_set_intfdata(interface, context); | |
| 910 | + | |
| 911 | + if (context->display && ifnum == 0) { | |
| 912 | + dev_dbg(dev, "%s: Registering iMON display with sysfs\n", | |
| 913 | + __func__); | |
| 914 | + | |
| 915 | + if (usb_register_dev(interface, &imon_class)) { | |
| 916 | + /* Not a fatal error, so ignore */ | |
| 917 | + dev_info(dev, "%s: could not get a minor number for " | |
| 918 | + "display\n", __func__); | |
| 919 | + } | |
| 920 | + } | |
| 921 | + | |
| 922 | + dev_info(dev, "iMON device (%04x:%04x, intf%d) on " | |
| 923 | + "usb<%d:%d> initialized\n", vendor, product, ifnum, | |
| 924 | + usbdev->bus->busnum, usbdev->devnum); | |
| 925 | + | |
| 926 | +unlock: | |
| 927 | + mutex_unlock(&context->ctx_lock); | |
| 928 | +alloc_status_switch: | |
| 929 | + | |
| 930 | + switch (alloc_status) { | |
| 931 | + case 7: | |
| 932 | + usb_free_urb(tx_urb); | |
| 933 | + case 6: | |
| 934 | + usb_free_urb(rx_urb); | |
| 935 | + case 5: | |
| 936 | + if (rbuf) | |
| 937 | + lirc_buffer_free(rbuf); | |
| 938 | + case 4: | |
| 939 | + kfree(rbuf); | |
| 940 | + case 3: | |
| 941 | + kfree(driver); | |
| 942 | + case 2: | |
| 943 | + kfree(context); | |
| 944 | + context = NULL; | |
| 945 | + case 1: | |
| 946 | + if (retval != -ENODEV) | |
| 947 | + retval = -ENOMEM; | |
| 948 | + break; | |
| 949 | + case 0: | |
| 950 | + retval = 0; | |
| 951 | + } | |
| 952 | + | |
| 953 | +exit: | |
| 954 | + mutex_unlock(&driver_lock); | |
| 955 | + | |
| 956 | + return retval; | |
| 957 | +} | |
| 958 | + | |
| 959 | +/** | |
| 960 | + * Callback function for USB core API: disconnect | |
| 961 | + */ | |
| 962 | +static void imon_disconnect(struct usb_interface *interface) | |
| 963 | +{ | |
| 964 | + struct imon_context *context; | |
| 965 | + int ifnum; | |
| 966 | + | |
| 967 | + /* prevent races with ir_open()/display_open() */ | |
| 968 | + mutex_lock(&driver_lock); | |
| 969 | + | |
| 970 | + context = usb_get_intfdata(interface); | |
| 971 | + ifnum = interface->cur_altsetting->desc.bInterfaceNumber; | |
| 972 | + | |
| 973 | + mutex_lock(&context->ctx_lock); | |
| 974 | + | |
| 975 | + usb_set_intfdata(interface, NULL); | |
| 976 | + | |
| 977 | + /* Abort ongoing write */ | |
| 978 | + if (atomic_read(&context->tx.busy)) { | |
| 979 | + usb_kill_urb(context->tx_urb); | |
| 980 | + complete_all(&context->tx.finished); | |
| 981 | + } | |
| 982 | + | |
| 983 | + context->dev_present = 0; | |
| 984 | + usb_kill_urb(context->rx_urb); | |
| 985 | + if (context->display) | |
| 986 | + usb_deregister_dev(interface, &imon_class); | |
| 987 | + | |
| 988 | + if (!context->ir_isopen && !context->dev_present) { | |
| 989 | + deregister_from_lirc(context); | |
| 990 | + mutex_unlock(&context->ctx_lock); | |
| 991 | + if (!context->display_isopen) | |
| 992 | + free_imon_context(context); | |
| 993 | + } else | |
| 994 | + mutex_unlock(&context->ctx_lock); | |
| 995 | + | |
| 996 | + mutex_unlock(&driver_lock); | |
| 997 | + | |
| 998 | + printk(KERN_INFO "%s: iMON device (intf%d) disconnected\n", | |
| 999 | + __func__, ifnum); | |
| 1000 | +} | |
| 1001 | + | |
| 1002 | +static int imon_suspend(struct usb_interface *intf, pm_message_t message) | |
| 1003 | +{ | |
| 1004 | + struct imon_context *context = usb_get_intfdata(intf); | |
| 1005 | + | |
| 1006 | + usb_kill_urb(context->rx_urb); | |
| 1007 | + | |
| 1008 | + return 0; | |
| 1009 | +} | |
| 1010 | + | |
| 1011 | +static int imon_resume(struct usb_interface *intf) | |
| 1012 | +{ | |
| 1013 | + int rc = 0; | |
| 1014 | + struct imon_context *context = usb_get_intfdata(intf); | |
| 1015 | + | |
| 1016 | + usb_fill_int_urb(context->rx_urb, context->usbdev, | |
| 1017 | + usb_rcvintpipe(context->usbdev, | |
| 1018 | + context->rx_endpoint->bEndpointAddress), | |
| 1019 | + context->usb_rx_buf, sizeof(context->usb_rx_buf), | |
| 1020 | + usb_rx_callback, context, | |
| 1021 | + context->rx_endpoint->bInterval); | |
| 1022 | + | |
| 1023 | + rc = usb_submit_urb(context->rx_urb, GFP_ATOMIC); | |
| 1024 | + | |
| 1025 | + return rc; | |
| 1026 | +} | |
| 1027 | + | |
| 1028 | +static int __init imon_init(void) | |
| 1029 | +{ | |
| 1030 | + int rc; | |
| 1031 | + | |
| 1032 | + printk(KERN_INFO MOD_NAME ": " MOD_DESC ", v" MOD_VERSION "\n"); | |
| 1033 | + | |
| 1034 | + rc = usb_register(&imon_driver); | |
| 1035 | + if (rc) { | |
| 1036 | + err("%s: usb register failed(%d)", __func__, rc); | |
| 1037 | + return -ENODEV; | |
| 1038 | + } | |
| 1039 | + | |
| 1040 | + return 0; | |
| 1041 | +} | |
| 1042 | + | |
| 1043 | +static void __exit imon_exit(void) | |
| 1044 | +{ | |
| 1045 | + usb_deregister(&imon_driver); | |
| 1046 | + printk(KERN_INFO MOD_NAME ": module removed. Goodbye!\n"); | |
| 1047 | +} | |
| 1048 | + | |
| 1049 | +module_init(imon_init); | |
| 1050 | +module_exit(imon_exit); | |