drivers/char/mwave/mwavedd.c

   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/mutex.h>
  60 #include <linux/delay.h>
  61 #include <linux/serial_8250.h>
  62 #include <linux/nospec.h>
  63 #include "smapi.h"
  64 #include "mwavedd.h"
  65 #include "3780i.h"
  66 #include "tp3780i.h"
  67
  68 MODULE_DESCRIPTION("3780i Advanced Communications Processor (Mwave) driver");
  69 MODULE_AUTHOR("Mike Sullivan and Paul Schroeder");
  70 MODULE_LICENSE("GPL");
  71
  72 /*
  73 * These parameters support the setting of MWave resources. Note that no
  74 * checks are made against other devices (ie. superio) for conflicts.
  75 * We'll depend on users using the tpctl utility to do that for now
  76 */
  77 static DEFINE_MUTEX(mwave_mutex);
  78 int mwave_debug = 0;
  79 int mwave_3780i_irq = 0;
  80 int mwave_3780i_io = 0;
  81 int mwave_uart_irq = 0;
  82 int mwave_uart_io = 0;
  83 module_param(mwave_debug, int, 0);
  84 module_param_hw(mwave_3780i_irq, int, irq, 0);
  85 module_param_hw(mwave_3780i_io, int, ioport, 0);
  86 module_param_hw(mwave_uart_irq, int, irq, 0);
  87 module_param_hw(mwave_uart_io, int, ioport, 0);
  88
  89 static int mwave_open(struct inode *inode, struct file *file);
  90 static int mwave_close(struct inode *inode, struct file *file);
  91 static long mwave_ioctl(struct file *filp, unsigned int iocmd,
  92                                                         unsigned long ioarg);
  93
  94 MWAVE_DEVICE_DATA mwave_s_mdd;
  95
  96 static int mwave_open(struct inode *inode, struct file *file)
  97 {
  98         unsigned int retval = 0;
  99
 100         PRINTK_3(TRACE_MWAVE,
 101                 "mwavedd::mwave_open, entry inode %p file %p\n",
 102                  inode, file);
 103         PRINTK_2(TRACE_MWAVE,
 104                 "mwavedd::mwave_open, exit return retval %x\n", retval);
 105
 106         return retval;
 107 }
 108
 109 static int mwave_close(struct inode *inode, struct file *file)
 110 {
 111         unsigned int retval = 0;
 112
 113         PRINTK_3(TRACE_MWAVE,
 114                 "mwavedd::mwave_close, entry inode %p file %p\n",
 115                  inode,  file);
 116
 117         PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_close, exit retval %x\n",
 118                 retval);
 119
 120         return retval;
 121 }
 122
 123 static long mwave_ioctl(struct file *file, unsigned int iocmd,
 124                                                         unsigned long ioarg)
 125 {
 126         unsigned int retval = 0;
 127         pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
 128         void __user *arg = (void __user *)ioarg;
 129
 130         PRINTK_4(TRACE_MWAVE,
 131                 "mwavedd::mwave_ioctl, entry file %p cmd %x arg %x\n",
 132                 file, iocmd, (int) ioarg);
 133
 134         switch (iocmd) {
 135
 136                 case IOCTL_MW_RESET:
 137                         PRINTK_1(TRACE_MWAVE,
 138                                 "mwavedd::mwave_ioctl, IOCTL_MW_RESET"
 139                                 " calling tp3780I_ResetDSP\n");
 140                         mutex_lock(&mwave_mutex);
 141                         retval = tp3780I_ResetDSP(&pDrvData->rBDData);
 142                         mutex_unlock(&mwave_mutex);
 143                         PRINTK_2(TRACE_MWAVE,
 144                                 "mwavedd::mwave_ioctl, IOCTL_MW_RESET"
 145                                 " retval %x from tp3780I_ResetDSP\n",
 146                                 retval);
 147                         break;
 148
 149                 case IOCTL_MW_RUN:
 150                         PRINTK_1(TRACE_MWAVE,
 151                                 "mwavedd::mwave_ioctl, IOCTL_MW_RUN"
 152                                 " calling tp3780I_StartDSP\n");
 153                         mutex_lock(&mwave_mutex);
 154                         retval = tp3780I_StartDSP(&pDrvData->rBDData);
 155                         mutex_unlock(&mwave_mutex);
 156                         PRINTK_2(TRACE_MWAVE,
 157                                 "mwavedd::mwave_ioctl, IOCTL_MW_RUN"
 158                                 " retval %x from tp3780I_StartDSP\n",
 159                                 retval);
 160                         break;
 161
 162                 case IOCTL_MW_DSP_ABILITIES: {
 163                         MW_ABILITIES rAbilities;
 164
 165                         PRINTK_1(TRACE_MWAVE,
 166                                 "mwavedd::mwave_ioctl,"
 167                                 " IOCTL_MW_DSP_ABILITIES calling"
 168                                 " tp3780I_QueryAbilities\n");
 169                         mutex_lock(&mwave_mutex);
 170                         retval = tp3780I_QueryAbilities(&pDrvData->rBDData,
 171                                         &rAbilities);
 172                         mutex_unlock(&mwave_mutex);
 173                         PRINTK_2(TRACE_MWAVE,
 174                                 "mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES"
 175                                 " retval %x from tp3780I_QueryAbilities\n",
 176                                 retval);
 177                         if (retval == 0) {
 178                                 if( copy_to_user(arg, &rAbilities,
 179                                                         sizeof(MW_ABILITIES)) )
 180                                         return -EFAULT;
 181                         }
 182                         PRINTK_2(TRACE_MWAVE,
 183                                 "mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES"
 184                                 " exit retval %x\n",
 185                                 retval);
 186                 }
 187                         break;
 188
 189                 case IOCTL_MW_READ_DATA:
 190                 case IOCTL_MW_READCLEAR_DATA: {
 191                         MW_READWRITE rReadData;
 192                         unsigned short __user *pusBuffer = NULL;
 193
 194                         if( copy_from_user(&rReadData, arg,
 195                                                 sizeof(MW_READWRITE)) )
 196                                 return -EFAULT;
 197                         pusBuffer = (unsigned short __user *) (rReadData.pBuf);
 198
 199                         PRINTK_4(TRACE_MWAVE,
 200                                 "mwavedd::mwave_ioctl IOCTL_MW_READ_DATA,"
 201                                 " size %lx, ioarg %lx pusBuffer %p\n",
 202                                 rReadData.ulDataLength, ioarg, pusBuffer);
 203                         mutex_lock(&mwave_mutex);
 204                         retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
 205                                         iocmd,
 206                                         pusBuffer,
 207                                         rReadData.ulDataLength,
 208                                         rReadData.usDspAddress);
 209                         mutex_unlock(&mwave_mutex);
 210                 }
 211                         break;
 212
 213                 case IOCTL_MW_READ_INST: {
 214                         MW_READWRITE rReadData;
 215                         unsigned short __user *pusBuffer = NULL;
 216
 217                         if( copy_from_user(&rReadData, arg,
 218                                                 sizeof(MW_READWRITE)) )
 219                                 return -EFAULT;
 220                         pusBuffer = (unsigned short __user *) (rReadData.pBuf);
 221
 222                         PRINTK_4(TRACE_MWAVE,
 223                                 "mwavedd::mwave_ioctl IOCTL_MW_READ_INST,"
 224                                 " size %lx, ioarg %lx pusBuffer %p\n",
 225                                 rReadData.ulDataLength / 2, ioarg,
 226                                 pusBuffer);
 227                         mutex_lock(&mwave_mutex);
 228                         retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
 229                                 iocmd, pusBuffer,
 230                                 rReadData.ulDataLength / 2,
 231                                 rReadData.usDspAddress);
 232                         mutex_unlock(&mwave_mutex);
 233                 }
 234                         break;
 235
 236                 case IOCTL_MW_WRITE_DATA: {
 237                         MW_READWRITE rWriteData;
 238                         unsigned short __user *pusBuffer = NULL;
 239
 240                         if( copy_from_user(&rWriteData, arg,
 241                                                 sizeof(MW_READWRITE)) )
 242                                 return -EFAULT;
 243                         pusBuffer = (unsigned short __user *) (rWriteData.pBuf);
 244
 245                         PRINTK_4(TRACE_MWAVE,
 246                                 "mwavedd::mwave_ioctl IOCTL_MW_WRITE_DATA,"
 247                                 " size %lx, ioarg %lx pusBuffer %p\n",
 248                                 rWriteData.ulDataLength, ioarg,
 249                                 pusBuffer);
 250                         mutex_lock(&mwave_mutex);
 251                         retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
 252                                         iocmd, pusBuffer,
 253                                         rWriteData.ulDataLength,
 254                                         rWriteData.usDspAddress);
 255                         mutex_unlock(&mwave_mutex);
 256                 }
 257                         break;
 258
 259                 case IOCTL_MW_WRITE_INST: {
 260                         MW_READWRITE rWriteData;
 261                         unsigned short __user *pusBuffer = NULL;
 262
 263                         if( copy_from_user(&rWriteData, arg,
 264                                                 sizeof(MW_READWRITE)) )
 265                                 return -EFAULT;
 266                         pusBuffer = (unsigned short __user *)(rWriteData.pBuf);
 267
 268                         PRINTK_4(TRACE_MWAVE,
 269                                 "mwavedd::mwave_ioctl IOCTL_MW_WRITE_INST,"
 270                                 " size %lx, ioarg %lx pusBuffer %p\n",
 271                                 rWriteData.ulDataLength, ioarg,
 272                                 pusBuffer);
 273                         mutex_lock(&mwave_mutex);
 274                         retval = tp3780I_ReadWriteDspIStore(&pDrvData->rBDData,
 275                                         iocmd, pusBuffer,
 276                                         rWriteData.ulDataLength,
 277                                         rWriteData.usDspAddress);
 278                         mutex_unlock(&mwave_mutex);
 279                 }
 280                         break;
 281
 282                 case IOCTL_MW_REGISTER_IPC: {
 283                         unsigned int ipcnum = (unsigned int) ioarg;
 284
 285                         if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
 286                                 PRINTK_ERROR(KERN_ERR_MWAVE
 287                                                 "mwavedd::mwave_ioctl:"
 288                                                 " IOCTL_MW_REGISTER_IPC:"
 289                                                 " Error: Invalid ipcnum %x\n",
 290                                                 ipcnum);
 291                                 return -EINVAL;
 292                         }
 293                         ipcnum = array_index_nospec(ipcnum,
 294                                                     ARRAY_SIZE(pDrvData->IPCs));
 295                         PRINTK_3(TRACE_MWAVE,
 296                                 "mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC"
 297                                 " ipcnum %x entry usIntCount %x\n",
 298                                 ipcnum,
 299                                 pDrvData->IPCs[ipcnum].usIntCount);
 300
 301                         mutex_lock(&mwave_mutex);
 302                         pDrvData->IPCs[ipcnum].bIsHere = false;
 303                         pDrvData->IPCs[ipcnum].bIsEnabled = true;
 304                         mutex_unlock(&mwave_mutex);
 305
 306                         PRINTK_2(TRACE_MWAVE,
 307                                 "mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC"
 308                                 " ipcnum %x exit\n",
 309                                 ipcnum);
 310                 }
 311                         break;
 312
 313                 case IOCTL_MW_GET_IPC: {
 314                         unsigned int ipcnum = (unsigned int) ioarg;
 315
 316                         if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
 317                                 PRINTK_ERROR(KERN_ERR_MWAVE
 318                                                 "mwavedd::mwave_ioctl:"
 319                                                 " IOCTL_MW_GET_IPC: Error:"
 320                                                 " Invalid ipcnum %x\n", ipcnum);
 321                                 return -EINVAL;
 322                         }
 323                         ipcnum = array_index_nospec(ipcnum,
 324                                                     ARRAY_SIZE(pDrvData->IPCs));
 325                         PRINTK_3(TRACE_MWAVE,
 326                                 "mwavedd::mwave_ioctl IOCTL_MW_GET_IPC"
 327                                 " ipcnum %x, usIntCount %x\n",
 328                                 ipcnum,
 329                                 pDrvData->IPCs[ipcnum].usIntCount);
 330
 331                         mutex_lock(&mwave_mutex);
 332                         if (pDrvData->IPCs[ipcnum].bIsEnabled == true) {
 333                                 DECLARE_WAITQUEUE(wait, current);
 334
 335                                 PRINTK_2(TRACE_MWAVE,
 336                                         "mwavedd::mwave_ioctl, thread for"
 337                                         " ipc %x going to sleep\n",
 338                                         ipcnum);
 339                                 add_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait);
 340                                 pDrvData->IPCs[ipcnum].bIsHere = true;
 341                                 set_current_state(TASK_INTERRUPTIBLE);
 342                                 /* check whether an event was signalled by */
 343                                 /* the interrupt handler while we were gone */
 344                                 if (pDrvData->IPCs[ipcnum].usIntCount == 1) {   /* first int has occurred (race condition) */
 345                                         pDrvData->IPCs[ipcnum].usIntCount = 2;  /* first int has been handled */
 346                                         PRINTK_2(TRACE_MWAVE,
 347                                                 "mwavedd::mwave_ioctl"
 348                                                 " IOCTL_MW_GET_IPC ipcnum %x"
 349                                                 " handling first int\n",
 350                                                 ipcnum);
 351                                 } else {        /* either 1st int has not yet occurred, or we have already handled the first int */
 352                                         schedule();
 353                                         if (pDrvData->IPCs[ipcnum].usIntCount == 1) {
 354                                                 pDrvData->IPCs[ipcnum].usIntCount = 2;
 355                                         }
 356                                         PRINTK_2(TRACE_MWAVE,
 357                                                 "mwavedd::mwave_ioctl"
 358                                                 " IOCTL_MW_GET_IPC ipcnum %x"
 359                                                 " woke up and returning to"
 360                                                 " application\n",
 361                                                 ipcnum);
 362                                 }
 363                                 pDrvData->IPCs[ipcnum].bIsHere = false;
 364                                 remove_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait);
 365                                 set_current_state(TASK_RUNNING);
 366                                 PRINTK_2(TRACE_MWAVE,
 367                                         "mwavedd::mwave_ioctl IOCTL_MW_GET_IPC,"
 368                                         " returning thread for ipc %x"
 369                                         " processing\n",
 370                                         ipcnum);
 371                         }
 372                         mutex_unlock(&mwave_mutex);
 373                 }
 374                         break;
 375
 376                 case IOCTL_MW_UNREGISTER_IPC: {
 377                         unsigned int ipcnum = (unsigned int) ioarg;
 378
 379                         PRINTK_2(TRACE_MWAVE,
 380                                 "mwavedd::mwave_ioctl IOCTL_MW_UNREGISTER_IPC"
 381                                 " ipcnum %x\n",
 382                                 ipcnum);
 383                         if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
 384                                 PRINTK_ERROR(KERN_ERR_MWAVE
 385                                                 "mwavedd::mwave_ioctl:"
 386                                                 " IOCTL_MW_UNREGISTER_IPC:"
 387                                                 " Error: Invalid ipcnum %x\n",
 388                                                 ipcnum);
 389                                 return -EINVAL;
 390                         }
 391                         ipcnum = array_index_nospec(ipcnum,
 392                                                     ARRAY_SIZE(pDrvData->IPCs));
 393                         mutex_lock(&mwave_mutex);
 394                         if (pDrvData->IPCs[ipcnum].bIsEnabled == true) {
 395                                 pDrvData->IPCs[ipcnum].bIsEnabled = false;
 396                                 if (pDrvData->IPCs[ipcnum].bIsHere == true) {
 397                                         wake_up_interruptible(&pDrvData->IPCs[ipcnum].ipc_wait_queue);
 398                                 }
 399                         }
 400                         mutex_unlock(&mwave_mutex);
 401                 }
 402                         break;
 403
 404                 default:
 405                         return -ENOTTY;
 406         } /* switch */
 407
 408         PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);
 409
 410         return retval;
 411 }
 412
 413
 414 static ssize_t mwave_read(struct file *file, char __user *buf, size_t count,
 415                           loff_t * ppos)
 416 {
 417         PRINTK_5(TRACE_MWAVE,
 418                 "mwavedd::mwave_read entry file %p, buf %p, count %zx ppos %p\n",
 419                 file, buf, count, ppos);
 420
 421         return -EINVAL;
 422 }
 423
 424
 425 static ssize_t mwave_write(struct file *file, const char __user *buf,
 426                            size_t count, loff_t * ppos)
 427 {
 428         PRINTK_5(TRACE_MWAVE,
 429                 "mwavedd::mwave_write entry file %p, buf %p,"
 430                 " count %zx ppos %p\n",
 431                 file, buf, count, ppos);
 432
 433         return -EINVAL;
 434 }
 435
 436
 437 static int register_serial_portandirq(unsigned int port, int irq)
 438 {
 439         struct uart_8250_port uart;
 440
 441         switch ( port ) {
 442                 case 0x3f8:
 443                 case 0x2f8:
 444                 case 0x3e8:
 445                 case 0x2e8:
 446                         /* OK */
 447                         break;
 448                 default:
 449                         PRINTK_ERROR(KERN_ERR_MWAVE
 450                                         "mwavedd::register_serial_portandirq:"
 451                                         " Error: Illegal port %x\n", port );
 452                         return -1;
 453         } /* switch */
 454         /* port is okay */
 455
 456         switch ( irq ) {
 457                 case 3:
 458                 case 4:
 459                 case 5:
 460                 case 7:
 461                         /* OK */
 462                         break;
 463                 default:
 464                         PRINTK_ERROR(KERN_ERR_MWAVE
 465                                         "mwavedd::register_serial_portandirq:"
 466                                         " Error: Illegal irq %x\n", irq );
 467                         return -1;
 468         } /* switch */
 469         /* irq is okay */
 470
 471         memset(&uart, 0, sizeof(uart));
 472
 473         uart.port.uartclk =  1843200;
 474         uart.port.iobase = port;
 475         uart.port.irq = irq;
 476         uart.port.iotype = UPIO_PORT;
 477         uart.port.flags =  UPF_SHARE_IRQ;
 478         return serial8250_register_8250_port(&uart);
 479 }
 480
 481
 482 static const struct file_operations mwave_fops = {
 483         .owner          = THIS_MODULE,
 484         .read           = mwave_read,
 485         .write          = mwave_write,
 486         .unlocked_ioctl = mwave_ioctl,
 487         .open           = mwave_open,
 488         .release        = mwave_close,
 489         .llseek         = default_llseek,
 490 };
 491
 492
 493 static struct miscdevice mwave_misc_dev = { MWAVE_MINOR, "mwave", &mwave_fops };
 494
 495 #if 0 /* totally b0rked */
 496 /*
 497  * sysfs support <paulsch@us.ibm.com>
 498  */
 499
 500 struct device mwave_device;
 501
 502 /* Prevent code redundancy, create a macro for mwave_show_* functions. */
 503 #define mwave_show_function(attr_name, format_string, field)            \
 504 static ssize_t mwave_show_##attr_name(struct device *dev, struct device_attribute *attr, char *buf)     \
 505 {                                                                       \
 506         DSP_3780I_CONFIG_SETTINGS *pSettings =                          \
 507                 &mwave_s_mdd.rBDData.rDspSettings;                      \
 508         return sprintf(buf, format_string, pSettings->field);           \
 509 }
 510
 511 /* All of our attributes are read attributes. */
 512 #define mwave_dev_rd_attr(attr_name, format_string, field)              \
 513         mwave_show_function(attr_name, format_string, field)            \
 514 static DEVICE_ATTR(attr_name, S_IRUGO, mwave_show_##attr_name, NULL)
 515
 516 mwave_dev_rd_attr (3780i_dma, "%i\n", usDspDma);
 517 mwave_dev_rd_attr (3780i_irq, "%i\n", usDspIrq);
 518 mwave_dev_rd_attr (3780i_io, "%#.4x\n", usDspBaseIO);
 519 mwave_dev_rd_attr (uart_irq, "%i\n", usUartIrq);
 520 mwave_dev_rd_attr (uart_io, "%#.4x\n", usUartBaseIO);
 521
 522 static struct device_attribute * const mwave_dev_attrs[] = {
 523         &dev_attr_3780i_dma,
 524         &dev_attr_3780i_irq,
 525         &dev_attr_3780i_io,
 526         &dev_attr_uart_irq,
 527         &dev_attr_uart_io,
 528 };
 529 #endif
 530
 531 /*
 532 * mwave_init is called on module load
 533 *
 534 * mwave_exit is called on module unload
 535 * mwave_exit is also used to clean up after an aborted mwave_init
 536 */
 537 static void mwave_exit(void)
 538 {
 539         pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
 540
 541         PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit entry\n");
 542
 543 #if 0
 544         for (i = 0; i < pDrvData->nr_registered_attrs; i++)
 545                 device_remove_file(&mwave_device, mwave_dev_attrs[i]);
 546         pDrvData->nr_registered_attrs = 0;
 547
 548         if (pDrvData->device_registered) {
 549                 device_unregister(&mwave_device);
 550                 pDrvData->device_registered = false;
 551         }
 552 #endif
 553
 554         if ( pDrvData->sLine >= 0 ) {
 555                 serial8250_unregister_port(pDrvData->sLine);
 556         }
 557         if (pDrvData->bMwaveDevRegistered) {
 558                 misc_deregister(&mwave_misc_dev);
 559         }
 560         if (pDrvData->bDSPEnabled) {
 561                 tp3780I_DisableDSP(&pDrvData->rBDData);
 562         }
 563         if (pDrvData->bResourcesClaimed) {
 564                 tp3780I_ReleaseResources(&pDrvData->rBDData);
 565         }
 566         if (pDrvData->bBDInitialized) {
 567                 tp3780I_Cleanup(&pDrvData->rBDData);
 568         }
 569
 570         PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit exit\n");
 571 }
 572
 573 module_exit(mwave_exit);
 574
 575 static int __init mwave_init(void)
 576 {
 577         int i;
 578         int retval = 0;
 579         pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
 580
 581         PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_init entry\n");
 582
 583         memset(&mwave_s_mdd, 0, sizeof(MWAVE_DEVICE_DATA));
 584
 585         pDrvData->bBDInitialized = false;
 586         pDrvData->bResourcesClaimed = false;
 587         pDrvData->bDSPEnabled = false;
 588         pDrvData->bDSPReset = false;
 589         pDrvData->bMwaveDevRegistered = false;
 590         pDrvData->sLine = -1;
 591
 592         for (i = 0; i < ARRAY_SIZE(pDrvData->IPCs); i++) {
 593                 pDrvData->IPCs[i].bIsEnabled = false;
 594                 pDrvData->IPCs[i].bIsHere = false;
 595                 pDrvData->IPCs[i].usIntCount = 0;       /* no ints received yet */
 596                 init_waitqueue_head(&pDrvData->IPCs[i].ipc_wait_queue);
 597         }
 598
 599         retval = tp3780I_InitializeBoardData(&pDrvData->rBDData);
 600         PRINTK_2(TRACE_MWAVE,
 601                 "mwavedd::mwave_init, return from tp3780I_InitializeBoardData"
 602                 " retval %x\n",
 603                 retval);
 604         if (retval) {
 605                 PRINTK_ERROR(KERN_ERR_MWAVE
 606                                 "mwavedd::mwave_init: Error:"
 607                                 " Failed to initialize board data\n");
 608                 goto cleanup_error;
 609         }
 610         pDrvData->bBDInitialized = true;
 611
 612         retval = tp3780I_CalcResources(&pDrvData->rBDData);
 613         PRINTK_2(TRACE_MWAVE,
 614                 "mwavedd::mwave_init, return from tp3780I_CalcResources"
 615                 " retval %x\n",
 616                 retval);
 617         if (retval) {
 618                 PRINTK_ERROR(KERN_ERR_MWAVE
 619                                 "mwavedd:mwave_init: Error:"
 620                                 " Failed to calculate resources\n");
 621                 goto cleanup_error;
 622         }
 623
 624         retval = tp3780I_ClaimResources(&pDrvData->rBDData);
 625         PRINTK_2(TRACE_MWAVE,
 626                 "mwavedd::mwave_init, return from tp3780I_ClaimResources"
 627                 " retval %x\n",
 628                 retval);
 629         if (retval) {
 630                 PRINTK_ERROR(KERN_ERR_MWAVE
 631                                 "mwavedd:mwave_init: Error:"
 632                                 " Failed to claim resources\n");
 633                 goto cleanup_error;
 634         }
 635         pDrvData->bResourcesClaimed = true;
 636
 637         retval = tp3780I_EnableDSP(&pDrvData->rBDData);
 638         PRINTK_2(TRACE_MWAVE,
 639                 "mwavedd::mwave_init, return from tp3780I_EnableDSP"
 640                 " retval %x\n",
 641                 retval);
 642         if (retval) {
 643                 PRINTK_ERROR(KERN_ERR_MWAVE
 644                                 "mwavedd:mwave_init: Error:"
 645                                 " Failed to enable DSP\n");
 646                 goto cleanup_error;
 647         }
 648         pDrvData->bDSPEnabled = true;
 649
 650         if (misc_register(&mwave_misc_dev) < 0) {
 651                 PRINTK_ERROR(KERN_ERR_MWAVE
 652                                 "mwavedd:mwave_init: Error:"
 653                                 " Failed to register misc device\n");
 654                 goto cleanup_error;
 655         }
 656         pDrvData->bMwaveDevRegistered = true;
 657
 658         pDrvData->sLine = register_serial_portandirq(
 659                 pDrvData->rBDData.rDspSettings.usUartBaseIO,
 660                 pDrvData->rBDData.rDspSettings.usUartIrq
 661         );
 662         if (pDrvData->sLine < 0) {
 663                 PRINTK_ERROR(KERN_ERR_MWAVE
 664                                 "mwavedd:mwave_init: Error:"
 665                                 " Failed to register serial driver\n");
 666                 goto cleanup_error;
 667         }
 668         /* uart is registered */
 669
 670 #if 0
 671         /* sysfs */
 672         memset(&mwave_device, 0, sizeof (struct device));
 673         dev_set_name(&mwave_device, "mwave");
 674
 675         if (device_register(&mwave_device))
 676                 goto cleanup_error;
 677         pDrvData->device_registered = true;
 678         for (i = 0; i < ARRAY_SIZE(mwave_dev_attrs); i++) {
 679                 if(device_create_file(&mwave_device, mwave_dev_attrs[i])) {
 680                         PRINTK_ERROR(KERN_ERR_MWAVE
 681                                         "mwavedd:mwave_init: Error:"
 682                                         " Failed to create sysfs file %s\n",
 683                                         mwave_dev_attrs[i]->attr.name);
 684                         goto cleanup_error;
 685                 }
 686                 pDrvData->nr_registered_attrs++;
 687         }
 688 #endif
 689
 690         /* SUCCESS! */
 691         return 0;
 692
 693 cleanup_error:
 694         PRINTK_ERROR(KERN_ERR_MWAVE
 695                         "mwavedd::mwave_init: Error:"
 696                         " Failed to initialize\n");
 697         mwave_exit(); /* clean up */
 698
 699         return -EIO;
 700 }
 701
 702 module_init(mwave_init);
 703