lincan/src/main.c

   1 /**************************************************************************/
   2 /* File: main.c - the CAN driver top level glue code (needs rewrite)      */
   3 /*                                                                        */
   4 /* LinCAN - (Not only) Linux CAN bus driver                               */
   5 /* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
   6 /* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz>             */
   7 /* Funded by OCERA and FRESCOR IST projects                               */
   8 /* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl>      */
   9 /*                                                                        */
  10 /* LinCAN is free software; you can redistribute it and/or modify it      */
  11 /* under terms of the GNU General Public License as published by the      */
  12 /* Free Software Foundation; either version 2, or (at your option) any    */
  13 /* later version.  LinCAN is distributed in the hope that it will be      */
  14 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
  15 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
  16 /* General Public License for more details. You should have received a    */
  17 /* copy of the GNU General Public License along with LinCAN; see file     */
  18 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
  19 /* Cambridge, MA 02139, USA.                                              */
  20 /*                                                                        */
  21 /* To allow use of LinCAN in the compact embedded systems firmware        */
  22 /* and RT-executives (RTEMS for example), main authors agree with next    */
  23 /* special exception:                                                     */
  24 /*                                                                        */
  25 /* Including LinCAN header files in a file, instantiating LinCAN generics */
  26 /* or templates, or linking other files with LinCAN objects to produce    */
  27 /* an application image/executable, does not by itself cause the          */
  28 /* resulting application image/executable to be covered by                */
  29 /* the GNU General Public License.                                        */
  30 /* This exception does not however invalidate any other reasons           */
  31 /* why the executable file might be covered by the GNU Public License.    */
  32 /* Publication of enhanced or derived LinCAN files is required although.  */
  33 /**************************************************************************/
  34
  35 #ifndef EXPORT_SYMTAB
  36 #define EXPORT_SYMTAB
  37 #endif
  38
  39 #include <linux/module.h>
  40
  41 #include <linux/kernel.h>
  42 #include <linux/fs.h>
  43 #include <linux/sched.h>
  44 #include <linux/poll.h>
  45 #include <linux/version.h>
  46 #include <linux/interrupt.h>
  47
  48 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
  49  #include <linux/autoconf.h>
  50  #include <linux/wrapper.h>
  51 #else
  52  #include <linux/device.h>
  53  #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
  54   static struct class *can_class;
  55  #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
  56   static struct class_simple *can_class;
  57   #define class_create class_simple_create
  58   #define class_device_create class_simple_device_add
  59   #define class_device_destroy(a,b) class_simple_device_remove(b)
  60   #define class_destroy class_simple_destroy
  61  #endif
  62 #endif
  63
  64 #if !defined (__GENKSYMS__)
  65 #if (defined (MODVERSIONS) && !defined(NOVER))
  66 #include <linux/modversions.h>
  67 /*#include "../include/main.ver"*/
  68 #endif
  69 #endif
  70
  71 /*#undef CONFIG_DEVFS_FS*/
  72
  73 #ifdef CONFIG_DEVFS_FS
  74 #include <linux/devfs_fs_kernel.h>
  75 #include <linux/miscdevice.h>
  76 #endif
  77
  78 #include "../include/can.h"
  79 #include "../include/can_sysdep.h"
  80 #include "../include/main.h"
  81 #include "../include/modparms.h"
  82 #include "../include/devcommon.h"
  83 #include "../include/setup.h"
  84 #include "../include/proc.h"
  85 #include "../include/open.h"
  86 #include "../include/close.h"
  87 #include "../include/read.h"
  88 #include "../include/select.h"
  89 #include "../include/irq.h"
  90 #include "../include/ioctl.h"
  91 #include "../include/write.h"
  92 #include "../include/finish.h"
  93 #include "../include/fasync.h"
  94
  95 #ifdef CAN_WITH_RTL
  96 #include <rtl_posixio.h>
  97 #include "../include/can_iortl.h"
  98 #endif /*CAN_WITH_RTL*/
  99
 100 #if defined(CONFIG_OC_LINCAN_CARD_usbcan)
 101         #include "../include/usbcan.h"
 102 #endif
 103
 104 can_spinlock_t canuser_manipulation_lock;
 105
 106 int major=CAN_MAJOR;
 107 int minor[MAX_TOT_CHIPS]={-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1};
 108 int extended=0;
 109 int pelican=0;
 110 int baudrate[MAX_TOT_CHIPS];
 111 char *hw[MAX_HW_CARDS]={NULL,};
 112 int irq[MAX_IRQ]={-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1};
 113 unsigned long io[MAX_HW_CARDS]={-1,-1,-1,-1,-1,-1,-1,-1};
 114 long clockfreq[MAX_HW_CARDS];
 115 int stdmask=0;
 116 int extmask=0;
 117 int mo15mask=0;
 118 int processlocal=0;
 119
 120 unsigned int minor_specified;
 121 unsigned int baudrate_specified;
 122 unsigned int hw_specified;
 123 unsigned int irq_specified;
 124 unsigned int io_specified;
 125 unsigned int clockfreq_specified;
 126
 127 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,12))
 128 /* Module parameters, some must be supplied at module loading time */
 129 MODULE_PARM(major,"1i");
 130 /*MODULE_PARM(minor, "1-" __MODULE_STRING(MAX_TOT_CHIPS)"i");*/
 131 MODULE_PARM(minor, "1-" __MODULE_STRING(MAX_TOT_CHIPS_STR)"i");
 132 MODULE_PARM(extended,"1i");
 133 MODULE_PARM(pelican,"1i");
 134 MODULE_PARM(baudrate, "1-" __MODULE_STRING(MAX_TOT_CHIPS_STR)"i");
 135 MODULE_PARM(hw, "1-" __MODULE_STRING(MAX_HW_CARDS)"s");
 136 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_IRQ)"i");
 137 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_HW_CARDS)"i");
 138 MODULE_PARM(clockfreq, "1-" __MODULE_STRING(MAX_HW_CARDS)"i");
 139 MODULE_PARM(stdmask, "1i");
 140 MODULE_PARM(extmask, "1i");
 141 MODULE_PARM(mo15mask, "1i");
 142 MODULE_PARM(processlocal, "1i");
 143
 144 #else /* LINUX_VERSION_CODE >= 2,6,12 */
 145 module_param(major, int, 0);
 146 module_param_array(minor, int, &minor_specified, 0);
 147 module_param(extended, int, 0);
 148 module_param(pelican, int, 0);
 149 module_param_array(baudrate, int, &baudrate_specified, 0);
 150 module_param_array(hw, charp, &hw_specified, 0);
 151 module_param_array(irq, int, &irq_specified, 0);
 152 module_param_array(io, ulong, &io_specified, 0);
 153 module_param_array(clockfreq, long, &clockfreq_specified, 0);
 154 module_param(stdmask, int, 0);
 155 module_param(extmask, int, 0);
 156 module_param(mo15mask, int, 0);
 157 module_param(processlocal, int, 0);
 158 #endif /* LINUX_VERSION_CODE >= 2,6,12 */
 159
 160 MODULE_PARM_DESC(major,"can be used to change default major [" __MODULE_STRING(CAN_MAJOR) "]");
 161 MODULE_PARM_DESC(minor,"can be used to change default starting minor for each channel");
 162 MODULE_PARM_DESC(extended,"enables automatic switching to extended format if ID>2047,"
 163                         " selects extended frames reception for i82527");
 164 MODULE_PARM_DESC(pelican,"unused parameter, PeliCAN used by default for sja1000p chips");
 165 MODULE_PARM_DESC(baudrate,"baudrate for each channel in step of 1kHz");
 166 MODULE_PARM_DESC(hw,"list of boards types to initialize - virtual,pip5,...");
 167 MODULE_PARM_DESC(irq,"list of iterrupt signal numbers, most ISA has one per chip, no value for PCI or virtual");
 168 MODULE_PARM_DESC(io,"IO address for each board, use 0 for PCI or virtual");
 169 MODULE_PARM_DESC(clockfreq,"base board clock source frequency in step of 1kHz");
 170 MODULE_PARM_DESC(stdmask,"default standard mask for i82527 chips");
 171 MODULE_PARM_DESC(extmask,"default extended mask for i82527 chips");
 172 MODULE_PARM_DESC(mo15mask,"mask for communication object 15 of i82527 chips");
 173 MODULE_PARM_DESC(processlocal,"select postprocessing/loopback of transmitted messages - "
 174                 "0 .. disabled, 1 .. can be enabled by FIFO filter, 2 .. enabled by default");
 175
 176 #ifdef CAN_WITH_RTL
 177 int can_rtl_priority=-1;
 178 MODULE_PARM(can_rtl_priority, "1i");
 179 MODULE_PARM_DESC(can_rtl_priority,"select priority of chip worker thread");
 180 #endif /*CAN_WITH_RTL*/
 181
 182 /* Other module attributes */
 183 #ifdef MODULE_SUPPORTED_DEVICE
 184 MODULE_SUPPORTED_DEVICE("can");
 185 #endif
 186 #ifdef MODULE_LICENSE
 187 MODULE_LICENSE("GPL");
 188 #endif
 189 #ifdef MODULE_DESCRIPTION
 190 MODULE_DESCRIPTION("Universal Linux CAN-bus device driver");
 191 #endif
 192 #ifdef MODULE_AUTHOR
 193 MODULE_AUTHOR("Pavel Pisa <pisa@cmp.felk.cvut.cz>, Arnaud Westenberg");
 194 #endif
 195
 196 /* Global structures, used to describe the installed hardware. */
 197 struct canhardware_t canhardware;
 198 struct canhardware_t *hardware_p=&canhardware;
 199 struct canchip_t *chips_p[MAX_TOT_CHIPS];
 200 struct msgobj_t *objects_p[MAX_TOT_MSGOBJS];
 201 #ifdef CONFIG_DEVFS_FS
 202 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 203 devfs_handle_t  devfs_handles[MAX_TOT_MSGOBJS];
 204 #endif
 205 #endif
 206
 207 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
 208 static int can_oldapi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 209 {
 210         return can_ioctl(file, cmd, arg);
 211 }
 212 #endif /* 2.6.36 */
 213
 214 /* Pointers to dynamically allocated memory are maintained in a linked list
 215  * to ease memory deallocation.
 216  */
 217 struct mem_addr *mem_head=NULL;
 218
 219 struct file_operations can_fops=
 220 {
 221  #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
 222         owner:          THIS_MODULE,
 223  #endif
 224         read:           can_read,
 225         write:          can_write,
 226         poll:           can_poll,
 227   #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
 228         ioctl:          can_oldapi_ioctl,
 229   #else /* Linux 3.x */
 230         unlocked_ioctl: can_ioctl,
 231   #endif /* Linux 3.x */
 232         open:           can_open,
 233         release:        can_close,
 234   #ifdef CAN_ENABLE_KERN_FASYNC
 235         fasync:         can_fasync
 236   #endif /*CAN_ENABLE_KERN_FASYNC*/
 237 };
 238
 239 EXPORT_SYMBOL(can_fops);
 240
 241
 242 #ifdef CAN_WITH_RTL
 243 struct rtl_file_operations can_fops_rtl = {
 244         llseek:         NULL,
 245         read:           can_read_rtl_posix,
 246         write:          can_write_rtl_posix,
 247         ioctl:          can_ioctl_rtl_posix,
 248         mmap:           NULL,
 249         open:           can_open_rtl_posix,
 250         release:        can_release_rtl_posix
 251 };
 252 #endif /*CAN_WITH_RTL*/
 253
 254
 255 /*
 256  2.6 kernel attributes for sysfs
 257
 258 static ssize_t show_xxx(struct class_device *cdev, char *buf)
 259 {
 260         return sprintf(buf, "xxxx\n");
 261 }
 262
 263 static ssize_t store_xxx(struct class_device *cdev, const char * buf, size_t count)
 264 {
 265 }
 266
 267 static CLASS_DEVICE_ATTR(xxx, S_IRUGO, show_xxx, store_xxx/NULL);
 268
 269 ret = class_device_create_file(class_dev, class_device_attr_xxx);
 270 if (ret)
 271         goto err_unregister;
 272
 273 */
 274
 275 int init_module(void)
 276 {
 277         int res=0,i=0, j;
 278         struct candevice_t *candev;
 279         struct canchip_t *chip;
 280
 281         if (parse_mod_parms())
 282                 return -EINVAL;
 283
 284         can_spin_lock_init(&canuser_manipulation_lock);
 285         canqueue_kern_initialize();
 286
 287         if (init_hw_struct())
 288                 return -ENODEV;
 289
 290         #ifdef CAN_DEBUG
 291                 list_hw();
 292         #endif
 293
 294         res=register_chrdev(major,DEVICE_NAME, &can_fops);
 295         if (res<0) {
 296                 CANMSG("Error registering driver.\n");
 297                 goto register_error;
 298         }
 299
 300         #ifdef CAN_WITH_RTL
 301         can_spin_lock_init(&can_irq_manipulation_lock);
 302         canqueue_rtl_initialize();
 303         res=rtl_register_rtldev(major,DEVICE_NAME,&can_fops_rtl);
 304         if (res<0) {
 305                 CANMSG("Error registering RT-Linux major number.\n");
 306                 goto rtldev_error;
 307         }
 308         #endif /*CAN_WITH_RTL*/
 309
 310         for (i=0; i<hardware_p->nr_boards; i++) {
 311                 candev=hardware_p->candevice[i];
 312                 if (candev->hwspecops->request_io(candev))
 313                         goto request_io_error;
 314                 candev->flags|=CANDEV_IO_RESERVED;
 315         }
 316
 317         for (i=0; i<hardware_p->nr_boards; i++) {
 318                 candev=hardware_p->candevice[i];
 319                 if (candev->hwspecops->reset(candev))
 320                         goto reset_error;
 321         }
 322
 323         can_spin_lock_init(&hardware_p->rtr_lock);
 324         hardware_p->rtr_queue=NULL;
 325
 326         for (i=0; i<hardware_p->nr_boards; i++) {
 327                 candev=hardware_p->candevice[i];
 328                 for(j=0; j<candev->nr_all_chips; j++) {
 329                         if((chip=candev->chip[j])==NULL)
 330                                 continue;
 331
 332                         if(chip->chipspecops->attach_to_chip(chip)<0) {
 333                                 CANMSG("Initial attach to the chip HW failed\n");
 334                                 goto interrupt_error;
 335                         }
 336
 337                         chip->flags |= CHIP_ATTACHED;
 338
 339                         if(can_chip_setup_irq(chip)<0) {
 340                                 CANMSG("Error to setup chip IRQ\n");
 341                                 goto interrupt_error;
 342                         }
 343                 }
 344
 345                 if (candev->flags & CANDEV_PROGRAMMABLE_IRQ)
 346                         if (candev->hwspecops->program_irq(candev)){
 347                                 CANMSG("Error to program board interrupt\n");
 348                                 goto interrupt_error;
 349                         }
 350         }
 351
 352 #ifdef CONFIG_PROC_FS
 353         if (can_init_procdir())
 354                 goto proc_error;
 355 #endif
 356
 357 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 358         can_class=class_create(THIS_MODULE, "can");
 359 #endif
 360
 361 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 362         {
 363             #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 364                 char dev_name[32];
 365             #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */
 366                 struct class_device *this_dev;
 367             #else
 368                 struct device *this_dev;
 369             #endif
 370                 int dev_minor;
 371                 for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 372                         if(!objects_p[i]) continue;
 373                         dev_minor=objects_p[i]->minor;
 374                     #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 375                         sprintf (dev_name, "can%d", dev_minor);
 376                         devfs_handles[i]=devfs_register(NULL, dev_name,
 377                                 DEVFS_FL_DEFAULT, major, dev_minor,
 378                                 S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
 379                                 &can_fops, (void*)objects_p[i]);
 380                     #else
 381                       #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,14))
 382                         this_dev=class_device_create(can_class, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 383                       #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */
 384                         this_dev=class_device_create(can_class, NULL, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 385                       #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,27)
 386                         this_dev=device_create_drvdata(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 387                       #else /* >= 2.6.28 */
 388                         this_dev=device_create(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 389                       #endif /* >= 2.6.28 */
 390                         if(IS_ERR(this_dev)){
 391                                 CANMSG("problem to create device \"can%d\" in the class \"can\"\n", dev_minor);
 392                       #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 393                         }else{
 394                                 /*this_dev->class_data=objects_p[i];*/
 395                                 class_set_devdata(this_dev,objects_p[i]);
 396                       #endif /* <= 2.6.25 */
 397                         }
 398                       #ifdef CONFIG_DEVFS_FS
 399                         devfs_mk_cdev(MKDEV(major, dev_minor), S_IFCHR | S_IRUGO | S_IWUGO, "can%d", dev_minor);
 400                       #endif
 401                     #endif
 402                 }
 403         }
 404 #endif
 405
 406 #if defined(CONFIG_OC_LINCAN_CARD_usbcan)
 407         res = usbcan_init();
 408         if (res){
 409                 CANMSG("usb_register for usbcan failed. Error number %d.\n", res);
 410                 goto memory_error;
 411         }
 412 #endif
 413
 414         return 0;
 415
 416 #ifdef CONFIG_PROC_FS
 417         proc_error: ;
 418                 CANMSG("Error registering /proc entry.\n");
 419                 goto memory_error;
 420 #endif
 421
 422         interrupt_error: ;
 423                 goto memory_error;
 424
 425         reset_error: ;
 426                 CANMSG("Error resetting device.\n");
 427                 goto memory_error;
 428
 429         request_io_error: ;
 430                 CANMSG("Error to request IO resources for device.\n");
 431                 goto memory_error;
 432
 433         memory_error: ;
 434                 canhardware_done(hardware_p);
 435
 436                 #ifdef CAN_WITH_RTL
 437                 rtl_unregister_rtldev(major,DEVICE_NAME);
 438         rtldev_error:
 439                 canqueue_rtl_done();
 440                 #endif /*CAN_WITH_RTL*/
 441
 442                 unregister_chrdev(major,DEVICE_NAME);
 443                 CANMSG("No CAN devices or driver setup error.\n");
 444
 445         register_error:
 446                 if ( can_del_mem_list() )
 447                         CANMSG("Error deallocating memory\n");
 448
 449                 return -ENODEV;
 450 }
 451
 452
 453
 454
 455 struct candevice_t* register_hotplug_dev(const char *hwname,int (*chipdataregfnc)(struct canchip_t *ch,void *data),void *devdata){
 456         int i=0, j, board=0;
 457         struct candevice_t *candev;
 458         struct canchip_t *chip;
 459         struct boardtype_t *brp;
 460
 461         while ( (hw[board] != NULL) && (board < MAX_HW_CARDS) )
 462                 board++;
 463         if (board>=MAX_HW_CARDS){
 464                 CANMSG("Maximum number of devices has been reached, no space for new device");
 465                 return NULL;
 466         }
 467         brp = boardtype_find(hwname);
 468         if(!brp) {
 469                 CANMSG("Sorry, hardware \"%s\" is currently not supported.\n",hwname);
 470                 return NULL;
 471         }
 472         if (board==MAX_HW_CARDS){
 473                         CANMSG("Device \"%s\" could not be registered due to internal limits.\n",hwname);
 474                         return NULL;
 475         }
 476         hw[board]=brp->boardtype;
 477
 478         if (init_new_hw_struct(board)){
 479                 CANMSG("HW struct creation failed.\n");
 480                 return NULL;
 481         }
 482
 483         #ifdef CAN_DEBUG
 484                 list_hw();
 485         #endif
 486
 487         candev=hardware_p->candevice[board];
 488
 489         /* Adding link to usb device structure into can device */
 490         candev->sysdevptr.anydev=devdata;
 491
 492         if (candev->hwspecops->request_io(candev))
 493                 goto request_io_error;
 494         candev->flags|=CANDEV_IO_RESERVED;
 495
 496         if (candev->hwspecops->reset(candev))
 497                 goto reset_error;
 498
 499         for(j=0; j<candev->nr_all_chips; j++) {
 500                 if((chip=candev->chip[j])==NULL)
 501                         continue;
 502
 503                 if (chipdataregfnc && devdata){
 504                         if (chipdataregfnc(chip,devdata))
 505                                 goto interrupt_error;
 506                 }
 507
 508                 if(chip->chipspecops->attach_to_chip(chip)<0) {
 509                         CANMSG("Initial attach to the chip HW failed\n");
 510                         goto interrupt_error;
 511                 }
 512
 513                 chip->flags |= CHIP_ATTACHED;
 514
 515                 if(can_chip_setup_irq(chip)<0) {
 516                         CANMSG("Error to setup chip IRQ\n");
 517                         goto interrupt_error;
 518                 }
 519         }
 520
 521         if (candev->flags & CANDEV_PROGRAMMABLE_IRQ)
 522                 if (candev->hwspecops->program_irq(candev)){
 523                         CANMSG("Error to program board interrupt\n");
 524                         goto interrupt_error;
 525                 }
 526         CANMSG("Registering /proc entry\n");
 527 #ifdef CONFIG_PROC_FS
 528         if (can_init_procentry(board))
 529                 goto proc_error;
 530 #endif
 531
 532 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 533         {
 534                 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 535                 char dev_name[32];
 536                 #else
 537                 struct class_device *this_dev;
 538                 #endif
 539                 int dev_minor;
 540                 for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 541                         if(!objects_p[i]) continue;
 542                         if(objects_p[i]->hostchip->hostdevice != candev) continue;
 543
 544                         dev_minor=objects_p[i]->minor;
 545                         #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 546                         sprintf (dev_name, "can%d", dev_minor);
 547                         devfs_handles[i]=devfs_register(NULL, dev_name,
 548                         DEVFS_FL_DEFAULT, major, dev_minor,
 549                         S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
 550                         &can_fops, (void*)objects_p[i]);
 551                         #else
 552                         #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,14))
 553                         this_dev=class_device_create(can_class, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 554                         #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */
 555                         this_dev=class_device_create(can_class, NULL, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 556                         #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,27)
 557                         this_dev=device_create_drvdata(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 558                         #else /* >= 2.6.28 */
 559                         this_dev=device_create(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 560                         #endif /* >= 2.6.28 */
 561                         if(IS_ERR(this_dev)){
 562                                 CANMSG("problem to create device \"can%d\" in the class \"can\"\n", dev_minor);
 563                       #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 564                         }else{
 565                                 /*this_dev->class_data=objects_p[i];*/
 566                                 class_set_devdata(this_dev,objects_p[i]);
 567                       #endif /* <= 2.6.25 */
 568                         }
 569                         #ifdef CONFIG_DEVFS_FS
 570                         devfs_mk_cdev(MKDEV(major, dev_minor), S_IFCHR | S_IRUGO | S_IWUGO, "can%d", dev_minor);
 571                         #endif
 572                         #endif
 573                 }
 574         }
 575 #endif
 576         return candev;
 577
 578 #ifdef CONFIG_PROC_FS
 579         proc_error: ;
 580                 CANMSG("Error registering /proc entry.\n");
 581                 goto memory_error;
 582 #endif
 583
 584         interrupt_error: ;
 585                 goto memory_error;
 586
 587         reset_error: ;
 588                 CANMSG("Error resetting device.\n");
 589                 goto memory_error;
 590
 591         request_io_error: ;
 592                 CANMSG("Error to request IO resources for device.\n");
 593                 goto memory_error;
 594
 595         memory_error: ;
 596
 597                 #ifdef CAN_WITH_RTL
 598         rtldev_error:
 599                 #endif /*CAN_WITH_RTL*/
 600
 601 //      register_error:
 602 //              if ( can_del_mem_list() )
 603 //                      CANMSG("Error deallocating memory\n");
 604
 605                 return NULL;
 606 }
 607
 608 void deregister_hotplug_dev(struct candevice_t *dev)
 609 {
 610         int i=0;
 611         int dev_minor;
 612
 613         if (!dev)
 614                 return;
 615         DEBUGMSG("Deregistering hotplug device.\n");
 616
 617 #ifdef CONFIG_PROC_FS
 618         if (can_delete_procentry(dev))
 619                 CANMSG("Error unregistering /proc/can entry.\n");
 620 #endif
 621
 622 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 623         for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 624                 if(!objects_p[i]) continue;
 625                 if(objects_p[i]->hostchip->hostdevice != dev) continue;
 626                 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 627                 if(devfs_handles[i])
 628                         devfs_unregister(devfs_handles[i]);
 629                 #else
 630                 dev_minor=objects_p[i]->minor;
 631                 if(dev_minor>=0){
 632                         #ifdef CONFIG_DEVFS_FS
 633                         devfs_remove("can%d", dev_minor);
 634                         #endif
 635                         #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 636                         class_device_destroy(can_class, MKDEV(major, dev_minor));
 637                         #else /* >= 2.6.26 */
 638                         device_destroy(can_class, MKDEV(major, dev_minor));
 639                         #endif /* >= 2.6.26 */
 640                 }
 641                 #endif
 642         }
 643 #endif
 644
 645 }
 646
 647
 648 void cleanup_hotplug_dev(struct candevice_t *dev)
 649 {
 650         int i=0;
 651         int dev_minor;
 652
 653         if (!dev)
 654                 return;
 655         DEBUGMSG("Cleaning up hotplug device.\n");
 656
 657         for(i=0;i<MAX_TOT_CHIPS;i++){
 658                 if(!chips_p[i]) continue;
 659                 if(chips_p[i]->hostdevice != dev) continue;
 660                 chips_p[i]=NULL;
 661         }
 662
 663         hardware_p->candevice[dev->candev_idx]=NULL;
 664         hardware_p->nr_boards--;
 665         hw[dev->candev_idx]=NULL;
 666
 667         candevice_done(dev);
 668         can_checked_free(dev);
 669 }
 670
 671
 672
 673
 674 void cleanup_module(void)
 675 {
 676 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 677         int i=0;
 678 #endif
 679
 680 #if defined(CONFIG_OC_LINCAN_CARD_usbcan)
 681         DEBUGMSG("Unregistering usbcan.\n");
 682         usbcan_exit();
 683 #endif
 684
 685         DEBUGMSG("Continuing with coldplug cleanup.\n");
 686 #ifdef CONFIG_PROC_FS
 687         if (can_delete_procdir())
 688                 CANMSG("Error unregistering /proc/can entry.\n");
 689 #endif
 690
 691 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 692         for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 693             #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 694                 if(devfs_handles[i])
 695                         devfs_unregister(devfs_handles[i]);
 696             #else
 697                 int dev_minor;
 698                 if(!objects_p[i]) continue;
 699                 dev_minor=objects_p[i]->minor;
 700                 if(minor>=0){
 701                     #ifdef CONFIG_DEVFS_FS
 702                         devfs_remove("can%d", dev_minor);
 703                     #endif
 704                     #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 705                         class_device_destroy(can_class, MKDEV(major, dev_minor));
 706                     #else /* >= 2.6.26 */
 707                         device_destroy(can_class, MKDEV(major, dev_minor));
 708                     #endif /* >= 2.6.26 */
 709                 }
 710             #endif
 711         }
 712 #endif
 713
 714 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 715         class_destroy(can_class);
 716 #endif
 717
 718         canhardware_done(hardware_p);
 719
 720         #ifdef CAN_WITH_RTL
 721         rtl_unregister_rtldev(major,DEVICE_NAME);
 722         canqueue_rtl_done();
 723         #endif /*CAN_WITH_RTL*/
 724
 725         DEBUGMSG("Can hardware cleanup done, freeing memory.\n");
 726
 727         if ( can_del_mem_list() )
 728                 CANMSG("Error deallocating memory\n");
 729
 730         unregister_chrdev(major,DEVICE_NAME);
 731 }