drivers/char/mwave/mwavedd.c

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This source file includes following definitions.
mwave_open
mwave_close
mwave_ioctl
mwave_read
mwave_write
register_serial_portandirq
mwave_exit
mwave_init
   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                         break;
 407         } /* switch */
 408 
 409         PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);
 410 
 411         return retval;
 412 }
 413 
 414 
 415 static ssize_t mwave_read(struct file *file, char __user *buf, size_t count,
 416                           loff_t * ppos)
 417 {
 418         PRINTK_5(TRACE_MWAVE,
 419                 "mwavedd::mwave_read entry file %p, buf %p, count %zx ppos %p\n",
 420                 file, buf, count, ppos);
 421 
 422         return -EINVAL;
 423 }
 424 
 425 
 426 static ssize_t mwave_write(struct file *file, const char __user *buf,
 427                            size_t count, loff_t * ppos)
 428 {
 429         PRINTK_5(TRACE_MWAVE,
 430                 "mwavedd::mwave_write entry file %p, buf %p,"
 431                 " count %zx ppos %p\n",
 432                 file, buf, count, ppos);
 433 
 434         return -EINVAL;
 435 }
 436 
 437 
 438 static int register_serial_portandirq(unsigned int port, int irq)
 439 {
 440         struct uart_8250_port uart;
 441         
 442         switch ( port ) {
 443                 case 0x3f8:
 444                 case 0x2f8:
 445                 case 0x3e8:
 446                 case 0x2e8:
 447                         /* OK */
 448                         break;
 449                 default:
 450                         PRINTK_ERROR(KERN_ERR_MWAVE
 451                                         "mwavedd::register_serial_portandirq:"
 452                                         " Error: Illegal port %x\n", port );
 453                         return -1;
 454         } /* switch */
 455         /* port is okay */
 456 
 457         switch ( irq ) {
 458                 case 3:
 459                 case 4:
 460                 case 5:
 461                 case 7:
 462                         /* OK */
 463                         break;
 464                 default:
 465                         PRINTK_ERROR(KERN_ERR_MWAVE
 466                                         "mwavedd::register_serial_portandirq:"
 467                                         " Error: Illegal irq %x\n", irq );
 468                         return -1;
 469         } /* switch */
 470         /* irq is okay */
 471 
 472         memset(&uart, 0, sizeof(uart));
 473         
 474         uart.port.uartclk =  1843200;
 475         uart.port.iobase = port;
 476         uart.port.irq = irq;
 477         uart.port.iotype = UPIO_PORT;
 478         uart.port.flags =  UPF_SHARE_IRQ;
 479         return serial8250_register_8250_port(&uart);
 480 }
 481 
 482 
 483 static const struct file_operations mwave_fops = {
 484         .owner          = THIS_MODULE,
 485         .read           = mwave_read,
 486         .write          = mwave_write,
 487         .unlocked_ioctl = mwave_ioctl,
 488         .open           = mwave_open,
 489         .release        = mwave_close,
 490         .llseek         = default_llseek,
 491 };
 492 
 493 
 494 static struct miscdevice mwave_misc_dev = { MWAVE_MINOR, "mwave", &mwave_fops };
 495 
 496 #if 0 /* totally b0rked */
 497 /*
 498  * sysfs support <paulsch@us.ibm.com>
 499  */
 500 
 501 struct device mwave_device;
 502 
 503 /* Prevent code redundancy, create a macro for mwave_show_* functions. */
 504 #define mwave_show_function(attr_name, format_string, field)            \
 505 static ssize_t mwave_show_##attr_name(struct device *dev, struct device_attribute *attr, char *buf)     \
 506 {                                                                       \
 507         DSP_3780I_CONFIG_SETTINGS *pSettings =                          \
 508                 &mwave_s_mdd.rBDData.rDspSettings;                      \
 509         return sprintf(buf, format_string, pSettings->field);           \
 510 }
 511 
 512 /* All of our attributes are read attributes. */
 513 #define mwave_dev_rd_attr(attr_name, format_string, field)              \
 514         mwave_show_function(attr_name, format_string, field)            \
 515 static DEVICE_ATTR(attr_name, S_IRUGO, mwave_show_##attr_name, NULL)
 516 
 517 mwave_dev_rd_attr (3780i_dma, "%i\n", usDspDma);
 518 mwave_dev_rd_attr (3780i_irq, "%i\n", usDspIrq);
 519 mwave_dev_rd_attr (3780i_io, "%#.4x\n", usDspBaseIO);
 520 mwave_dev_rd_attr (uart_irq, "%i\n", usUartIrq);
 521 mwave_dev_rd_attr (uart_io, "%#.4x\n", usUartBaseIO);
 522 
 523 static struct device_attribute * const mwave_dev_attrs[] = {
 524         &dev_attr_3780i_dma,
 525         &dev_attr_3780i_irq,
 526         &dev_attr_3780i_io,
 527         &dev_attr_uart_irq,
 528         &dev_attr_uart_io,
 529 };
 530 #endif
 531 
 532 /*
 533 * mwave_init is called on module load
 534 *
 535 * mwave_exit is called on module unload
 536 * mwave_exit is also used to clean up after an aborted mwave_init
 537 */
 538 static void mwave_exit(void)
 539 {
 540         pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
 541 
 542         PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit entry\n");
 543 
 544 #if 0
 545         for (i = 0; i < pDrvData->nr_registered_attrs; i++)
 546                 device_remove_file(&mwave_device, mwave_dev_attrs[i]);
 547         pDrvData->nr_registered_attrs = 0;
 548 
 549         if (pDrvData->device_registered) {
 550                 device_unregister(&mwave_device);
 551                 pDrvData->device_registered = false;
 552         }
 553 #endif
 554 
 555         if ( pDrvData->sLine >= 0 ) {
 556                 serial8250_unregister_port(pDrvData->sLine);
 557         }
 558         if (pDrvData->bMwaveDevRegistered) {
 559                 misc_deregister(&mwave_misc_dev);
 560         }
 561         if (pDrvData->bDSPEnabled) {
 562                 tp3780I_DisableDSP(&pDrvData->rBDData);
 563         }
 564         if (pDrvData->bResourcesClaimed) {
 565                 tp3780I_ReleaseResources(&pDrvData->rBDData);
 566         }
 567         if (pDrvData->bBDInitialized) {
 568                 tp3780I_Cleanup(&pDrvData->rBDData);
 569         }
 570 
 571         PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit exit\n");
 572 }
 573 
 574 module_exit(mwave_exit);
 575 
 576 static int __init mwave_init(void)
 577 {
 578         int i;
 579         int retval = 0;
 580         pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
 581 
 582         PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_init entry\n");
 583 
 584         memset(&mwave_s_mdd, 0, sizeof(MWAVE_DEVICE_DATA));
 585 
 586         pDrvData->bBDInitialized = false;
 587         pDrvData->bResourcesClaimed = false;
 588         pDrvData->bDSPEnabled = false;
 589         pDrvData->bDSPReset = false;
 590         pDrvData->bMwaveDevRegistered = false;
 591         pDrvData->sLine = -1;
 592 
 593         for (i = 0; i < ARRAY_SIZE(pDrvData->IPCs); i++) {
 594                 pDrvData->IPCs[i].bIsEnabled = false;
 595                 pDrvData->IPCs[i].bIsHere = false;
 596                 pDrvData->IPCs[i].usIntCount = 0;       /* no ints received yet */
 597                 init_waitqueue_head(&pDrvData->IPCs[i].ipc_wait_queue);
 598         }
 599 
 600         retval = tp3780I_InitializeBoardData(&pDrvData->rBDData);
 601         PRINTK_2(TRACE_MWAVE,
 602                 "mwavedd::mwave_init, return from tp3780I_InitializeBoardData"
 603                 " retval %x\n",
 604                 retval);
 605         if (retval) {
 606                 PRINTK_ERROR(KERN_ERR_MWAVE
 607                                 "mwavedd::mwave_init: Error:"
 608                                 " Failed to initialize board data\n");
 609                 goto cleanup_error;
 610         }
 611         pDrvData->bBDInitialized = true;
 612 
 613         retval = tp3780I_CalcResources(&pDrvData->rBDData);
 614         PRINTK_2(TRACE_MWAVE,
 615                 "mwavedd::mwave_init, return from tp3780I_CalcResources"
 616                 " retval %x\n",
 617                 retval);
 618         if (retval) {
 619                 PRINTK_ERROR(KERN_ERR_MWAVE
 620                                 "mwavedd:mwave_init: Error:"
 621                                 " Failed to calculate resources\n");
 622                 goto cleanup_error;
 623         }
 624 
 625         retval = tp3780I_ClaimResources(&pDrvData->rBDData);
 626         PRINTK_2(TRACE_MWAVE,
 627                 "mwavedd::mwave_init, return from tp3780I_ClaimResources"
 628                 " retval %x\n",
 629                 retval);
 630         if (retval) {
 631                 PRINTK_ERROR(KERN_ERR_MWAVE
 632                                 "mwavedd:mwave_init: Error:"
 633                                 " Failed to claim resources\n");
 634                 goto cleanup_error;
 635         }
 636         pDrvData->bResourcesClaimed = true;
 637 
 638         retval = tp3780I_EnableDSP(&pDrvData->rBDData);
 639         PRINTK_2(TRACE_MWAVE,
 640                 "mwavedd::mwave_init, return from tp3780I_EnableDSP"
 641                 " retval %x\n",
 642                 retval);
 643         if (retval) {
 644                 PRINTK_ERROR(KERN_ERR_MWAVE
 645                                 "mwavedd:mwave_init: Error:"
 646                                 " Failed to enable DSP\n");
 647                 goto cleanup_error;
 648         }
 649         pDrvData->bDSPEnabled = true;
 650 
 651         if (misc_register(&mwave_misc_dev) < 0) {
 652                 PRINTK_ERROR(KERN_ERR_MWAVE
 653                                 "mwavedd:mwave_init: Error:"
 654                                 " Failed to register misc device\n");
 655                 goto cleanup_error;
 656         }
 657         pDrvData->bMwaveDevRegistered = true;
 658 
 659         pDrvData->sLine = register_serial_portandirq(
 660                 pDrvData->rBDData.rDspSettings.usUartBaseIO,
 661                 pDrvData->rBDData.rDspSettings.usUartIrq
 662         );
 663         if (pDrvData->sLine < 0) {
 664                 PRINTK_ERROR(KERN_ERR_MWAVE
 665                                 "mwavedd:mwave_init: Error:"
 666                                 " Failed to register serial driver\n");
 667                 goto cleanup_error;
 668         }
 669         /* uart is registered */
 670 
 671 #if 0
 672         /* sysfs */
 673         memset(&mwave_device, 0, sizeof (struct device));
 674         dev_set_name(&mwave_device, "mwave");
 675 
 676         if (device_register(&mwave_device))
 677                 goto cleanup_error;
 678         pDrvData->device_registered = true;
 679         for (i = 0; i < ARRAY_SIZE(mwave_dev_attrs); i++) {
 680                 if(device_create_file(&mwave_device, mwave_dev_attrs[i])) {
 681                         PRINTK_ERROR(KERN_ERR_MWAVE
 682                                         "mwavedd:mwave_init: Error:"
 683                                         " Failed to create sysfs file %s\n",
 684                                         mwave_dev_attrs[i]->attr.name);
 685                         goto cleanup_error;
 686                 }
 687                 pDrvData->nr_registered_attrs++;
 688         }
 689 #endif
 690 
 691         /* SUCCESS! */
 692         return 0;
 693 
 694 cleanup_error:
 695         PRINTK_ERROR(KERN_ERR_MWAVE
 696                         "mwavedd::mwave_init: Error:"
 697                         " Failed to initialize\n");
 698         mwave_exit(); /* clean up */
 699 
 700         return -EIO;
 701 }
 702 
 703 module_init(mwave_init);
 704
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/char/mwave/mwavedd.c

DEFINITIONS
