1/* 2* 3* mwavedd.c -- mwave device driver 4* 5* 6* Written By: Mike Sullivan IBM Corporation 7* 8* Copyright (C) 1999 IBM Corporation 9* 10* This program is free software; you can redistribute it and/or modify 11* it under the terms of the GNU General Public License as published by 12* the Free Software Foundation; either version 2 of the License, or 13* (at your option) any later version. 14* 15* This program is distributed in the hope that it will be useful, 16* but WITHOUT ANY WARRANTY; without even the implied warranty of 17* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18* GNU General Public License for more details. 19* 20* NO WARRANTY 21* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR 22* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT 23* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, 24* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is 25* solely responsible for determining the appropriateness of using and 26* distributing the Program and assumes all risks associated with its 27* exercise of rights under this Agreement, including but not limited to 28* the risks and costs of program errors, damage to or loss of data, 29* programs or equipment, and unavailability or interruption of operations. 30* 31* DISCLAIMER OF LIABILITY 32* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY 33* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND 35* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 36* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 37* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED 38* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES 39* 40* You should have received a copy of the GNU General Public License 41* along with this program; if not, write to the Free Software 42* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 43* 44* 45* 10/23/2000 - Alpha Release 46* First release to the public 47*/ 48 49#include <linux/module.h> 50#include <linux/kernel.h> 51#include <linux/fs.h> 52#include <linux/init.h> 53#include <linux/major.h> 54#include <linux/miscdevice.h> 55#include <linux/device.h> 56#include <linux/serial.h> 57#include <linux/sched.h> 58#include <linux/spinlock.h> 59#include <linux/smp_lock.h> 60#include <linux/delay.h> 61#include <linux/serial_8250.h> 62#include "smapi.h" 63#include "mwavedd.h" 64#include "3780i.h" 65#include "tp3780i.h" 66 67MODULE_DESCRIPTION("3780i Advanced Communications Processor (Mwave) driver"); 68MODULE_AUTHOR("Mike Sullivan and Paul Schroeder"); 69MODULE_LICENSE("GPL"); 70 71/* 72* These parameters support the setting of MWave resources. Note that no 73* checks are made against other devices (ie. superio) for conflicts. 74* We'll depend on users using the tpctl utility to do that for now 75*/ 76int mwave_debug = 0; 77int mwave_3780i_irq = 0; 78int mwave_3780i_io = 0; 79int mwave_uart_irq = 0; 80int mwave_uart_io = 0; 81module_param(mwave_debug, int, 0); 82module_param(mwave_3780i_irq, int, 0); 83module_param(mwave_3780i_io, int, 0); 84module_param(mwave_uart_irq, int, 0); 85module_param(mwave_uart_io, int, 0); 86 87static int mwave_open(struct inode *inode, struct file *file); 88static int mwave_close(struct inode *inode, struct file *file); 89static long mwave_ioctl(struct file *filp, unsigned int iocmd, 90 unsigned long ioarg); 91 92MWAVE_DEVICE_DATA mwave_s_mdd; 93 94static int mwave_open(struct inode *inode, struct file *file) 95{ 96 unsigned int retval = 0; 97 98 PRINTK_3(TRACE_MWAVE, 99 "mwavedd::mwave_open, entry inode %p file %p\n", 100 inode, file); 101 PRINTK_2(TRACE_MWAVE, 102 "mwavedd::mwave_open, exit return retval %x\n", retval); 103 104 cycle_kernel_lock(); 105 return retval; 106} 107 108static int mwave_close(struct inode *inode, struct file *file) 109{ 110 unsigned int retval = 0; 111 112 PRINTK_3(TRACE_MWAVE, 113 "mwavedd::mwave_close, entry inode %p file %p\n", 114 inode, file); 115 116 PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_close, exit retval %x\n", 117 retval); 118 119 return retval; 120} 121 122static long mwave_ioctl(struct file *file, unsigned int iocmd, 123 unsigned long ioarg) 124{ 125 unsigned int retval = 0; 126 pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd; 127 void __user *arg = (void __user *)ioarg; 128 129 PRINTK_4(TRACE_MWAVE, 130 "mwavedd::mwave_ioctl, entry file %p cmd %x arg %x\n", 131 file, iocmd, (int) ioarg); 132 133 switch (iocmd) { 134 135 case IOCTL_MW_RESET: 136 PRINTK_1(TRACE_MWAVE, 137 "mwavedd::mwave_ioctl, IOCTL_MW_RESET" 138 " calling tp3780I_ResetDSP\n"); 139 lock_kernel(); 140 retval = tp3780I_ResetDSP(&pDrvData->rBDData); 141 unlock_kernel(); 142 PRINTK_2(TRACE_MWAVE, 143 "mwavedd::mwave_ioctl, IOCTL_MW_RESET" 144 " retval %x from tp3780I_ResetDSP\n", 145 retval); 146 break; 147 148 case IOCTL_MW_RUN: 149 PRINTK_1(TRACE_MWAVE, 150 "mwavedd::mwave_ioctl, IOCTL_MW_RUN" 151 " calling tp3780I_StartDSP\n"); 152 lock_kernel(); 153 retval = tp3780I_StartDSP(&pDrvData->rBDData); 154 unlock_kernel(); 155 PRINTK_2(TRACE_MWAVE, 156 "mwavedd::mwave_ioctl, IOCTL_MW_RUN" 157 " retval %x from tp3780I_StartDSP\n", 158 retval); 159 break; 160 161 case IOCTL_MW_DSP_ABILITIES: { 162 MW_ABILITIES rAbilities; 163 164 PRINTK_1(TRACE_MWAVE, 165 "mwavedd::mwave_ioctl," 166 " IOCTL_MW_DSP_ABILITIES calling" 167 " tp3780I_QueryAbilities\n"); 168 lock_kernel(); 169 retval = tp3780I_QueryAbilities(&pDrvData->rBDData, 170 &rAbilities); 171 unlock_kernel(); 172 PRINTK_2(TRACE_MWAVE, 173 "mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES" 174 " retval %x from tp3780I_QueryAbilities\n", 175 retval); 176 if (retval == 0) { 177 if( copy_to_user(arg, &rAbilities, 178 sizeof(MW_ABILITIES)) ) 179 return -EFAULT; 180 } 181 PRINTK_2(TRACE_MWAVE, 182 "mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES" 183 " exit retval %x\n", 184 retval); 185 } 186 break; 187 188 case IOCTL_MW_READ_DATA: 189 case IOCTL_MW_READCLEAR_DATA: { 190 MW_READWRITE rReadData; 191 unsigned short __user *pusBuffer = NULL; 192 193 if( copy_from_user(&rReadData, arg, 194 sizeof(MW_READWRITE)) ) 195 return -EFAULT; 196 pusBuffer = (unsigned short __user *) (rReadData.pBuf); 197 198 PRINTK_4(TRACE_MWAVE, 199 "mwavedd::mwave_ioctl IOCTL_MW_READ_DATA," 200 " size %lx, ioarg %lx pusBuffer %p\n", 201 rReadData.ulDataLength, ioarg, pusBuffer); 202 lock_kernel(); 203 retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData, 204 iocmd, 205 pusBuffer, 206 rReadData.ulDataLength, 207 rReadData.usDspAddress); 208 unlock_kernel(); 209 } 210 break; 211 212 case IOCTL_MW_READ_INST: { 213 MW_READWRITE rReadData; 214 unsigned short __user *pusBuffer = NULL; 215 216 if( copy_from_user(&rReadData, arg, 217 sizeof(MW_READWRITE)) ) 218 return -EFAULT; 219 pusBuffer = (unsigned short __user *) (rReadData.pBuf); 220 221 PRINTK_4(TRACE_MWAVE, 222 "mwavedd::mwave_ioctl IOCTL_MW_READ_INST," 223 " size %lx, ioarg %lx pusBuffer %p\n", 224 rReadData.ulDataLength / 2, ioarg, 225 pusBuffer); 226 lock_kernel(); 227 retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData, 228 iocmd, pusBuffer, 229 rReadData.ulDataLength / 2, 230 rReadData.usDspAddress); 231 unlock_kernel(); 232 } 233 break; 234 235 case IOCTL_MW_WRITE_DATA: { 236 MW_READWRITE rWriteData; 237 unsigned short __user *pusBuffer = NULL; 238 239 if( copy_from_user(&rWriteData, arg, 240 sizeof(MW_READWRITE)) ) 241 return -EFAULT; 242 pusBuffer = (unsigned short __user *) (rWriteData.pBuf); 243 244 PRINTK_4(TRACE_MWAVE, 245 "mwavedd::mwave_ioctl IOCTL_MW_WRITE_DATA," 246 " size %lx, ioarg %lx pusBuffer %p\n", 247 rWriteData.ulDataLength, ioarg, 248 pusBuffer); 249 lock_kernel(); 250 retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData, 251 iocmd, pusBuffer, 252 rWriteData.ulDataLength, 253 rWriteData.usDspAddress); 254 unlock_kernel(); 255 } 256 break; 257 258 case IOCTL_MW_WRITE_INST: { 259 MW_READWRITE rWriteData; 260 unsigned short __user *pusBuffer = NULL; 261 262 if( copy_from_user(&rWriteData, arg, 263 sizeof(MW_READWRITE)) ) 264 return -EFAULT; 265 pusBuffer = (unsigned short __user *)(rWriteData.pBuf); 266 267 PRINTK_4(TRACE_MWAVE, 268 "mwavedd::mwave_ioctl IOCTL_MW_WRITE_INST," 269 " size %lx, ioarg %lx pusBuffer %p\n", 270 rWriteData.ulDataLength, ioarg, 271 pusBuffer); 272 lock_kernel(); 273 retval = tp3780I_ReadWriteDspIStore(&pDrvData->rBDData, 274 iocmd, pusBuffer, 275 rWriteData.ulDataLength, 276 rWriteData.usDspAddress); 277 unlock_kernel(); 278 } 279 break; 280 281 case IOCTL_MW_REGISTER_IPC: { 282 unsigned int ipcnum = (unsigned int) ioarg; 283 284 if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) { 285 PRINTK_ERROR(KERN_ERR_MWAVE 286 "mwavedd::mwave_ioctl:" 287 " IOCTL_MW_REGISTER_IPC:" 288 " Error: Invalid ipcnum %x\n", 289 ipcnum); 290 return -EINVAL; 291 } 292 PRINTK_3(TRACE_MWAVE, 293 "mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC" 294 " ipcnum %x entry usIntCount %x\n", 295 ipcnum, 296 pDrvData->IPCs[ipcnum].usIntCount); 297 298 lock_kernel(); 299 pDrvData->IPCs[ipcnum].bIsHere = FALSE; 300 pDrvData->IPCs[ipcnum].bIsEnabled = TRUE; 301 unlock_kernel(); 302 303 PRINTK_2(TRACE_MWAVE, 304 "mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC" 305 " ipcnum %x exit\n", 306 ipcnum); 307 } 308 break; 309 310 case IOCTL_MW_GET_IPC: { 311 unsigned int ipcnum = (unsigned int) ioarg; 312 313 if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) { 314 PRINTK_ERROR(KERN_ERR_MWAVE 315 "mwavedd::mwave_ioctl:" 316 " IOCTL_MW_GET_IPC: Error:" 317 " Invalid ipcnum %x\n", ipcnum); 318 return -EINVAL; 319 } 320 PRINTK_3(TRACE_MWAVE, 321 "mwavedd::mwave_ioctl IOCTL_MW_GET_IPC" 322 " ipcnum %x, usIntCount %x\n", 323 ipcnum, 324 pDrvData->IPCs[ipcnum].usIntCount); 325 326 lock_kernel(); 327 if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) { 328 DECLARE_WAITQUEUE(wait, current); 329 330 PRINTK_2(TRACE_MWAVE, 331 "mwavedd::mwave_ioctl, thread for" 332 " ipc %x going to sleep\n", 333 ipcnum); 334 add_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait); 335 pDrvData->IPCs[ipcnum].bIsHere = TRUE; 336 set_current_state(TASK_INTERRUPTIBLE); 337 /* check whether an event was signalled by */ 338 /* the interrupt handler while we were gone */ 339 if (pDrvData->IPCs[ipcnum].usIntCount == 1) { /* first int has occurred (race condition) */ 340 pDrvData->IPCs[ipcnum].usIntCount = 2; /* first int has been handled */ 341 PRINTK_2(TRACE_MWAVE, 342 "mwavedd::mwave_ioctl" 343 " IOCTL_MW_GET_IPC ipcnum %x" 344 " handling first int\n", 345 ipcnum); 346 } else { /* either 1st int has not yet occurred, or we have already handled the first int */ 347 schedule(); 348 if (pDrvData->IPCs[ipcnum].usIntCount == 1) { 349 pDrvData->IPCs[ipcnum].usIntCount = 2; 350 } 351 PRINTK_2(TRACE_MWAVE, 352 "mwavedd::mwave_ioctl" 353 " IOCTL_MW_GET_IPC ipcnum %x" 354 " woke up and returning to" 355 " application\n", 356 ipcnum); 357 } 358 pDrvData->IPCs[ipcnum].bIsHere = FALSE; 359 remove_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait); 360 set_current_state(TASK_RUNNING); 361 PRINTK_2(TRACE_MWAVE, 362 "mwavedd::mwave_ioctl IOCTL_MW_GET_IPC," 363 " returning thread for ipc %x" 364 " processing\n", 365 ipcnum); 366 } 367 unlock_kernel(); 368 } 369 break; 370 371 case IOCTL_MW_UNREGISTER_IPC: { 372 unsigned int ipcnum = (unsigned int) ioarg; 373 374 PRINTK_2(TRACE_MWAVE, 375 "mwavedd::mwave_ioctl IOCTL_MW_UNREGISTER_IPC" 376 " ipcnum %x\n", 377 ipcnum); 378 if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) { 379 PRINTK_ERROR(KERN_ERR_MWAVE 380 "mwavedd::mwave_ioctl:" 381 " IOCTL_MW_UNREGISTER_IPC:" 382 " Error: Invalid ipcnum %x\n", 383 ipcnum); 384 return -EINVAL; 385 } 386 lock_kernel(); 387 if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) { 388 pDrvData->IPCs[ipcnum].bIsEnabled = FALSE; 389 if (pDrvData->IPCs[ipcnum].bIsHere == TRUE) { 390 wake_up_interruptible(&pDrvData->IPCs[ipcnum].ipc_wait_queue); 391 } 392 } 393 unlock_kernel(); 394 } 395 break; 396 397 default: 398 return -ENOTTY; 399 break; 400 } /* switch */ 401 402 PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval); 403 404 return retval; 405} 406 407 408static ssize_t mwave_read(struct file *file, char __user *buf, size_t count, 409 loff_t * ppos) 410{ 411 PRINTK_5(TRACE_MWAVE, 412 "mwavedd::mwave_read entry file %p, buf %p, count %zx ppos %p\n", 413 file, buf, count, ppos); 414 415 return -EINVAL; 416} 417 418 419static ssize_t mwave_write(struct file *file, const char __user *buf, 420 size_t count, loff_t * ppos) 421{ 422 PRINTK_5(TRACE_MWAVE, 423 "mwavedd::mwave_write entry file %p, buf %p," 424 " count %zx ppos %p\n", 425 file, buf, count, ppos); 426 427 return -EINVAL; 428} 429 430 431static int register_serial_portandirq(unsigned int port, int irq) 432{ 433 struct uart_port uart; 434 435 switch ( port ) { 436 case 0x3f8: 437 case 0x2f8: 438 case 0x3e8: 439 case 0x2e8: 440 /* OK */ 441 break; 442 default: 443 PRINTK_ERROR(KERN_ERR_MWAVE 444 "mwavedd::register_serial_portandirq:" 445 " Error: Illegal port %x\n", port ); 446 return -1; 447 } /* switch */ 448 /* port is okay */ 449 450 switch ( irq ) { 451 case 3: 452 case 4: 453 case 5: 454 case 7: 455 /* OK */ 456 break; 457 default: 458 PRINTK_ERROR(KERN_ERR_MWAVE 459 "mwavedd::register_serial_portandirq:" 460 " Error: Illegal irq %x\n", irq ); 461 return -1; 462 } /* switch */ 463 /* irq is okay */ 464 465 memset(&uart, 0, sizeof(struct uart_port)); 466 467 uart.uartclk = 1843200; 468 uart.iobase = port; 469 uart.irq = irq; 470 uart.iotype = UPIO_PORT; 471 uart.flags = UPF_SHARE_IRQ; 472 return serial8250_register_port(&uart); 473} 474 475 476static const struct file_operations mwave_fops = { 477 .owner = THIS_MODULE, 478 .read = mwave_read, 479 .write = mwave_write, 480 .unlocked_ioctl = mwave_ioctl, 481 .open = mwave_open, 482 .release = mwave_close 483}; 484 485 486static struct miscdevice mwave_misc_dev = { MWAVE_MINOR, "mwave", &mwave_fops }; 487 488 489/* 490* mwave_init is called on module load 491* 492* mwave_exit is called on module unload 493* mwave_exit is also used to clean up after an aborted mwave_init 494*/ 495static void mwave_exit(void) 496{ 497 pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd; 498 499 PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit entry\n"); 500 501 502 if ( pDrvData->sLine >= 0 ) { 503 serial8250_unregister_port(pDrvData->sLine); 504 } 505 if (pDrvData->bMwaveDevRegistered) { 506 misc_deregister(&mwave_misc_dev); 507 } 508 if (pDrvData->bDSPEnabled) { 509 tp3780I_DisableDSP(&pDrvData->rBDData); 510 } 511 if (pDrvData->bResourcesClaimed) { 512 tp3780I_ReleaseResources(&pDrvData->rBDData); 513 } 514 if (pDrvData->bBDInitialized) { 515 tp3780I_Cleanup(&pDrvData->rBDData); 516 } 517 518 PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit exit\n"); 519} 520 521module_exit(mwave_exit); 522 523static int __init mwave_init(void) 524{ 525 int i; 526 int retval = 0; 527 pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd; 528 529 PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_init entry\n"); 530 531 memset(&mwave_s_mdd, 0, sizeof(MWAVE_DEVICE_DATA)); 532 533 pDrvData->bBDInitialized = FALSE; 534 pDrvData->bResourcesClaimed = FALSE; 535 pDrvData->bDSPEnabled = FALSE; 536 pDrvData->bDSPReset = FALSE; 537 pDrvData->bMwaveDevRegistered = FALSE; 538 pDrvData->sLine = -1; 539 540 for (i = 0; i < ARRAY_SIZE(pDrvData->IPCs); i++) { 541 pDrvData->IPCs[i].bIsEnabled = FALSE; 542 pDrvData->IPCs[i].bIsHere = FALSE; 543 pDrvData->IPCs[i].usIntCount = 0; /* no ints received yet */ 544 init_waitqueue_head(&pDrvData->IPCs[i].ipc_wait_queue); 545 } 546 547 retval = tp3780I_InitializeBoardData(&pDrvData->rBDData); 548 PRINTK_2(TRACE_MWAVE, 549 "mwavedd::mwave_init, return from tp3780I_InitializeBoardData" 550 " retval %x\n", 551 retval); 552 if (retval) { 553 PRINTK_ERROR(KERN_ERR_MWAVE 554 "mwavedd::mwave_init: Error:" 555 " Failed to initialize board data\n"); 556 goto cleanup_error; 557 } 558 pDrvData->bBDInitialized = TRUE; 559 560 retval = tp3780I_CalcResources(&pDrvData->rBDData); 561 PRINTK_2(TRACE_MWAVE, 562 "mwavedd::mwave_init, return from tp3780I_CalcResources" 563 " retval %x\n", 564 retval); 565 if (retval) { 566 PRINTK_ERROR(KERN_ERR_MWAVE 567 "mwavedd:mwave_init: Error:" 568 " Failed to calculate resources\n"); 569 goto cleanup_error; 570 } 571 572 retval = tp3780I_ClaimResources(&pDrvData->rBDData); 573 PRINTK_2(TRACE_MWAVE, 574 "mwavedd::mwave_init, return from tp3780I_ClaimResources" 575 " retval %x\n", 576 retval); 577 if (retval) { 578 PRINTK_ERROR(KERN_ERR_MWAVE 579 "mwavedd:mwave_init: Error:" 580 " Failed to claim resources\n"); 581 goto cleanup_error; 582 } 583 pDrvData->bResourcesClaimed = TRUE; 584 585 retval = tp3780I_EnableDSP(&pDrvData->rBDData); 586 PRINTK_2(TRACE_MWAVE, 587 "mwavedd::mwave_init, return from tp3780I_EnableDSP" 588 " retval %x\n", 589 retval); 590 if (retval) { 591 PRINTK_ERROR(KERN_ERR_MWAVE 592 "mwavedd:mwave_init: Error:" 593 " Failed to enable DSP\n"); 594 goto cleanup_error; 595 } 596 pDrvData->bDSPEnabled = TRUE; 597 598 if (misc_register(&mwave_misc_dev) < 0) { 599 PRINTK_ERROR(KERN_ERR_MWAVE 600 "mwavedd:mwave_init: Error:" 601 " Failed to register misc device\n"); 602 goto cleanup_error; 603 } 604 pDrvData->bMwaveDevRegistered = TRUE; 605 606 pDrvData->sLine = register_serial_portandirq( 607 pDrvData->rBDData.rDspSettings.usUartBaseIO, 608 pDrvData->rBDData.rDspSettings.usUartIrq 609 ); 610 if (pDrvData->sLine < 0) { 611 PRINTK_ERROR(KERN_ERR_MWAVE 612 "mwavedd:mwave_init: Error:" 613 " Failed to register serial driver\n"); 614 goto cleanup_error; 615 } 616 /* uart is registered */ 617 618 619 /* SUCCESS! */ 620 return 0; 621 622cleanup_error: 623 PRINTK_ERROR(KERN_ERR_MWAVE 624 "mwavedd::mwave_init: Error:" 625 " Failed to initialize\n"); 626 mwave_exit(); /* clean up */ 627 628 return -EIO; 629} 630 631module_init(mwave_init); 632