drivers/sbus/char/vfc_dev.c

   1 /*
   2  * drivers/sbus/char/vfc_dev.c
   3  *
   4  * Driver for the Videopix Frame Grabber.
   5  *
   6  * In order to use the VFC you need to program the video controller
   7  * chip. This chip is the Phillips SAA9051.  You need to call their
   8  * documentation ordering line to get the docs.
   9  *
  10  * There is very little documentation on the VFC itself.  There is
  11  * some useful info that can be found in the manuals that come with
  12  * the card.  I will hopefully write some better docs at a later date.
  13  *
  14  * Copyright (C) 1996 Manish Vachharajani (mvachhar@noc.rutgers.edu)
  15  * */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/string.h>
  20 #include <linux/slab.h>
  21 #include <linux/errno.h>
  22 #include <linux/sched.h>
  23 #include <linux/fs.h>
  24 #include <linux/smp_lock.h>
  25 #include <linux/delay.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/mm.h>
  28
  29 #include <asm/openprom.h>
  30 #include <asm/oplib.h>
  31 #include <asm/io.h>
  32 #include <asm/system.h>
  33 #include <asm/sbus.h>
  34 #include <asm/page.h>
  35 #include <asm/pgtable.h>
  36 #include <asm/uaccess.h>
  37
  38 #define VFC_MAJOR (60)
  39
  40 #if 0
  41 #define VFC_IOCTL_DEBUG
  42 #endif
  43
  44 #include "vfc.h"
  45 #include <asm/vfc_ioctls.h>
  46
  47 static struct file_operations vfc_fops;
  48 struct vfc_dev **vfc_dev_lst;
  49 static char vfcstr[]="vfc";
  50 static unsigned char saa9051_init_array[VFC_SAA9051_NR] = {
  51         0x00, 0x64, 0x72, 0x52,
  52         0x36, 0x18, 0xff, 0x20,
  53         0xfc, 0x77, 0xe3, 0x50,
  54         0x3e
  55 };
  56
  57 void vfc_lock_device(struct vfc_dev *dev)
  58 {
  59         down(&dev->device_lock_sem);
  60 }
  61
  62 void vfc_unlock_device(struct vfc_dev *dev)
  63 {
  64         up(&dev->device_lock_sem);
  65 }
  66
  67
  68 void vfc_captstat_reset(struct vfc_dev *dev)
  69 {
  70         dev->control_reg |= VFC_CONTROL_CAPTRESET;
  71         sbus_writel(dev->control_reg, &dev->regs->control);
  72         dev->control_reg &= ~VFC_CONTROL_CAPTRESET;
  73         sbus_writel(dev->control_reg, &dev->regs->control);
  74         dev->control_reg |= VFC_CONTROL_CAPTRESET;
  75         sbus_writel(dev->control_reg, &dev->regs->control);
  76 }
  77
  78 void vfc_memptr_reset(struct vfc_dev *dev)
  79 {
  80         dev->control_reg |= VFC_CONTROL_MEMPTR;
  81         sbus_writel(dev->control_reg, &dev->regs->control);
  82         dev->control_reg &= ~VFC_CONTROL_MEMPTR;
  83         sbus_writel(dev->control_reg, &dev->regs->control);
  84         dev->control_reg |= VFC_CONTROL_MEMPTR;
  85         sbus_writel(dev->control_reg, &dev->regs->control);
  86 }
  87
  88 int vfc_csr_init(struct vfc_dev *dev)
  89 {
  90         dev->control_reg = 0x80000000;
  91         sbus_writel(dev->control_reg, &dev->regs->control);
  92         udelay(200);
  93         dev->control_reg &= ~0x80000000;
  94         sbus_writel(dev->control_reg, &dev->regs->control);
  95         udelay(100);
  96         sbus_writel(0x0f000000, &dev->regs->i2c_magic2);
  97
  98         vfc_memptr_reset(dev);
  99
 100         dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
 101         dev->control_reg &= ~VFC_CONTROL_CAPTURE;
 102         dev->control_reg |= 0x40000000;
 103         sbus_writel(dev->control_reg, &dev->regs->control);
 104
 105         vfc_captstat_reset(dev);
 106
 107         return 0;
 108 }
 109
 110 int vfc_saa9051_init(struct vfc_dev *dev)
 111 {
 112         int i;
 113
 114         for (i = 0; i < VFC_SAA9051_NR; i++)
 115                 dev->saa9051_state_array[i] = saa9051_init_array[i];
 116
 117         vfc_i2c_sendbuf(dev,VFC_SAA9051_ADDR,
 118                         dev->saa9051_state_array, VFC_SAA9051_NR);
 119         return 0;
 120 }
 121
 122 int init_vfc_hw(struct vfc_dev *dev)
 123 {
 124         vfc_lock_device(dev);
 125         vfc_csr_init(dev);
 126
 127         vfc_pcf8584_init(dev);
 128         vfc_init_i2c_bus(dev); /* hopefully this doesn't undo the magic
 129                                   sun code above*/
 130         vfc_saa9051_init(dev);
 131         vfc_unlock_device(dev);
 132         return 0;
 133 }
 134
 135 int init_vfc_devstruct(struct vfc_dev *dev, int instance)
 136 {
 137         dev->instance=instance;
 138         init_MUTEX(&dev->device_lock_sem);
 139         dev->control_reg=0;
 140         init_waitqueue_head(&dev->poll_wait);
 141         dev->busy=0;
 142         return 0;
 143 }
 144
 145 int init_vfc_device(struct sbus_dev *sdev,struct vfc_dev *dev, int instance)
 146 {
 147         if(dev == NULL) {
 148                 printk(KERN_ERR "VFC: Bogus pointer passed\n");
 149                 return -ENOMEM;
 150         }
 151         printk("Initializing vfc%d\n",instance);
 152         dev->regs = NULL;
 153         dev->regs = (volatile struct vfc_regs *)
 154                 sbus_ioremap(&sdev->resource[0], 0,
 155                              sizeof(struct vfc_regs), vfcstr);
 156         dev->which_io = sdev->reg_addrs[0].which_io;
 157         dev->phys_regs = (struct vfc_regs *) sdev->reg_addrs[0].phys_addr;
 158         if (dev->regs == NULL)
 159                 return -EIO;
 160
 161         printk("vfc%d: registers mapped at phys_addr: 0x%lx\n    virt_addr: 0x%lx\n",
 162                instance,(unsigned long)sdev->reg_addrs[0].phys_addr,(unsigned long)dev->regs);
 163
 164         if (init_vfc_devstruct(dev, instance))
 165                 return -EINVAL;
 166         if (init_vfc_hw(dev))
 167                 return -EIO;
 168
 169         devfs_mk_cdev(MKDEV(VFC_MAJOR, instance),
 170                         S_IFCHR | S_IRUSR | S_IWUSR,
 171                         "vfc/%d", instance);
 172         return 0;
 173 }
 174
 175
 176 struct vfc_dev *vfc_get_dev_ptr(int instance)
 177 {
 178         return vfc_dev_lst[instance];
 179 }
 180
 181 static spinlock_t vfc_dev_lock = SPIN_LOCK_UNLOCKED;
 182
 183 static int vfc_open(struct inode *inode, struct file *file)
 184 {
 185         struct vfc_dev *dev;
 186
 187         spin_lock(&vfc_dev_lock);
 188         dev = vfc_get_dev_ptr(iminor(inode));
 189         if (dev == NULL) {
 190                 spin_unlock(&vfc_dev_lock);
 191                 return -ENODEV;
 192         }
 193         if (dev->busy) {
 194                 spin_unlock(&vfc_dev_lock);
 195                 return -EBUSY;
 196         }
 197
 198         dev->busy = 1;
 199         spin_unlock(&vfc_dev_lock);
 200
 201         vfc_lock_device(dev);
 202
 203         vfc_csr_init(dev);
 204         vfc_pcf8584_init(dev);
 205         vfc_init_i2c_bus(dev);
 206         vfc_saa9051_init(dev);
 207         vfc_memptr_reset(dev);
 208         vfc_captstat_reset(dev);
 209
 210         vfc_unlock_device(dev);
 211         return 0;
 212 }
 213
 214 static int vfc_release(struct inode *inode,struct file *file)
 215 {
 216         struct vfc_dev *dev;
 217
 218         spin_lock(&vfc_dev_lock);
 219         dev = vfc_get_dev_ptr(iminor(inode));
 220         if (!dev || !dev->busy) {
 221                 spin_unlock(&vfc_dev_lock);
 222                 return -EINVAL;
 223         }
 224         dev->busy = 0;
 225         spin_unlock(&vfc_dev_lock);
 226         return 0;
 227 }
 228
 229 static int vfc_debug(struct vfc_dev *dev, int cmd, unsigned long arg)
 230 {
 231         struct vfc_debug_inout inout;
 232         unsigned char *buffer;
 233
 234         if (!capable(CAP_SYS_ADMIN))
 235                 return -EPERM;
 236
 237         switch(cmd) {
 238         case VFC_I2C_SEND:
 239                 if(copy_from_user(&inout, (void *)arg, sizeof(inout)))
 240                         return -EFAULT;
 241
 242                 buffer = kmalloc(inout.len*sizeof(char), GFP_KERNEL);
 243                 if (buffer == NULL)
 244                         return -ENOMEM;
 245
 246                 if(copy_from_user(buffer, inout.buffer,
 247                                   inout.len*sizeof(char))) {
 248                         kfree(buffer);
 249                         return -EFAULT;
 250                 }
 251
 252
 253                 vfc_lock_device(dev);
 254                 inout.ret=
 255                         vfc_i2c_sendbuf(dev,inout.addr & 0xff,
 256                                         inout.buffer,inout.len);
 257
 258                 if (copy_to_user((void *)arg,&inout,sizeof(inout))) {
 259                         kfree(buffer);
 260                         return -EFAULT;
 261                 }
 262                 vfc_unlock_device(dev);
 263
 264                 break;
 265         case VFC_I2C_RECV:
 266                 if (copy_from_user(&inout, (void *)arg, sizeof(inout)))
 267                         return -EFAULT;
 268
 269                 buffer = kmalloc(inout.len, GFP_KERNEL);
 270                 if (buffer == NULL)
 271                         return -ENOMEM;
 272
 273                 memset(buffer,0,inout.len*sizeof(char));
 274                 vfc_lock_device(dev);
 275                 inout.ret=
 276                         vfc_i2c_recvbuf(dev,inout.addr & 0xff
 277                                         ,buffer,inout.len);
 278                 vfc_unlock_device(dev);
 279
 280                 if (copy_to_user(inout.buffer, buffer, inout.len)) {
 281                         kfree(buffer);
 282                         return -EFAULT;
 283                 }
 284                 if (copy_to_user((void *)arg,&inout,sizeof(inout))) {
 285                         kfree(buffer);
 286                         return -EFAULT;
 287                 }
 288                 kfree(buffer);
 289                 break;
 290         default:
 291                 return -EINVAL;
 292         };
 293
 294         return 0;
 295 }
 296
 297 int vfc_capture_start(struct vfc_dev *dev)
 298 {
 299         vfc_captstat_reset(dev);
 300         dev->control_reg = sbus_readl(&dev->regs->control);
 301         if((dev->control_reg & VFC_STATUS_CAPTURE)) {
 302                 printk(KERN_ERR "vfc%d: vfc capture status not reset\n",
 303                        dev->instance);
 304                 return -EIO;
 305         }
 306
 307         vfc_lock_device(dev);
 308         dev->control_reg &= ~VFC_CONTROL_CAPTURE;
 309         sbus_writel(dev->control_reg, &dev->regs->control);
 310         dev->control_reg |= VFC_CONTROL_CAPTURE;
 311         sbus_writel(dev->control_reg, &dev->regs->control);
 312         dev->control_reg &= ~VFC_CONTROL_CAPTURE;
 313         sbus_writel(dev->control_reg, &dev->regs->control);
 314         vfc_unlock_device(dev);
 315
 316         return 0;
 317 }
 318
 319 int vfc_capture_poll(struct vfc_dev *dev)
 320 {
 321         int timeout = 1000;
 322
 323         while (!timeout--) {
 324                 if (dev->regs->control & VFC_STATUS_CAPTURE)
 325                         break;
 326                 vfc_i2c_delay_no_busy(dev, 100);
 327         }
 328         if(!timeout) {
 329                 printk(KERN_WARNING "vfc%d: capture timed out\n",
 330                        dev->instance);
 331                 return -ETIMEDOUT;
 332         }
 333         return 0;
 334 }
 335
 336
 337
 338 static int vfc_set_control_ioctl(struct inode *inode, struct file *file,
 339                           struct vfc_dev *dev, unsigned long arg)
 340 {
 341         int setcmd, ret = 0;
 342
 343         if (copy_from_user(&setcmd,(void *)arg,sizeof(unsigned int)))
 344                 return -EFAULT;
 345
 346         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSCTRL) arg=0x%x\n",
 347                                 dev->instance,setcmd));
 348
 349         switch(setcmd) {
 350         case MEMPRST:
 351                 vfc_lock_device(dev);
 352                 vfc_memptr_reset(dev);
 353                 vfc_unlock_device(dev);
 354                 ret=0;
 355                 break;
 356         case CAPTRCMD:
 357                 vfc_capture_start(dev);
 358                 vfc_capture_poll(dev);
 359                 break;
 360         case DIAGMODE:
 361                 if(capable(CAP_SYS_ADMIN)) {
 362                         vfc_lock_device(dev);
 363                         dev->control_reg |= VFC_CONTROL_DIAGMODE;
 364                         sbus_writel(dev->control_reg, &dev->regs->control);
 365                         vfc_unlock_device(dev);
 366                         ret = 0;
 367                 } else {
 368                         ret = -EPERM;
 369                 }
 370                 break;
 371         case NORMMODE:
 372                 vfc_lock_device(dev);
 373                 dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
 374                 sbus_writel(dev->control_reg, &dev->regs->control);
 375                 vfc_unlock_device(dev);
 376                 ret = 0;
 377                 break;
 378         case CAPTRSTR:
 379                 vfc_capture_start(dev);
 380                 ret = 0;
 381                 break;
 382         case CAPTRWAIT:
 383                 vfc_capture_poll(dev);
 384                 ret = 0;
 385                 break;
 386         default:
 387                 ret = -EINVAL;
 388                 break;
 389         };
 390
 391         return ret;
 392 }
 393
 394
 395 int vfc_port_change_ioctl(struct inode *inode, struct file *file,
 396                           struct vfc_dev *dev, unsigned long arg)
 397 {
 398         int ret = 0;
 399         int cmd;
 400
 401         if(copy_from_user(&cmd, (void *)arg, sizeof(unsigned int))) {
 402                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 403                                         "vfc_port_change_ioctl\n",
 404                                         dev->instance));
 405                 return -EFAULT;
 406         }
 407
 408         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCPORTCHG) arg=0x%x\n",
 409                                 dev->instance, cmd));
 410
 411         switch(cmd) {
 412         case 1:
 413         case 2:
 414                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x72;
 415                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x52;
 416                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0x36;
 417                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0x18;
 418                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) = VFC_SAA9051_BP2;
 419                 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_CT | VFC_SAA9051_SS3;
 420                 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0x3e;
 421                 break;
 422         case 3:
 423                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x3a;
 424                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x17;
 425                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0xfa;
 426                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0xde;
 427                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) =
 428                         VFC_SAA9051_BY | VFC_SAA9051_PF | VFC_SAA9051_BP2;
 429                 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_YC;
 430                 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0;
 431                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
 432                         ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 433                 break;
 434         default:
 435                 ret = -EINVAL;
 436                 return ret;
 437                 break;
 438         }
 439
 440         switch(cmd) {
 441         case 1:
 442                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |=
 443                         (VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 444                 break;
 445         case 2:
 446                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
 447                         ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 448                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |= VFC_SAA9051_SS0;
 449                 break;
 450         case 3:
 451                 break;
 452         default:
 453                 ret = -EINVAL;
 454                 return ret;
 455                 break;
 456         }
 457         VFC_SAA9051_SA(dev,VFC_SAA9051_C3) &= ~(VFC_SAA9051_SS2);
 458         ret=vfc_update_saa9051(dev);
 459         udelay(500);
 460         VFC_SAA9051_SA(dev,VFC_SAA9051_C3) |= (VFC_SAA9051_SS2);
 461         ret=vfc_update_saa9051(dev);
 462         return ret;
 463 }
 464
 465 int vfc_set_video_ioctl(struct inode *inode, struct file *file,
 466                         struct vfc_dev *dev, unsigned long arg)
 467 {
 468         int ret = 0;
 469         int cmd;
 470
 471         if(copy_from_user(&cmd, (void *)arg, sizeof(unsigned int))) {
 472                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 473                                         "vfc_set_video_ioctl\n",
 474                                         dev->instance));
 475                 return ret;
 476         }
 477
 478         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSVID) arg=0x%x\n",
 479                                 dev->instance, cmd));
 480         switch(cmd) {
 481         case STD_NTSC:
 482                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~VFC_SAA9051_ALT;
 483                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_YPN |
 484                         VFC_SAA9051_CCFR0 | VFC_SAA9051_CCFR1 | VFC_SAA9051_FS;
 485                 ret = vfc_update_saa9051(dev);
 486                 break;
 487         case STD_PAL:
 488                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_YPN |
 489                                                         VFC_SAA9051_CCFR1 |
 490                                                         VFC_SAA9051_CCFR0 |
 491                                                         VFC_SAA9051_FS);
 492                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_ALT;
 493                 ret = vfc_update_saa9051(dev);
 494                 break;
 495
 496         case COLOR_ON:
 497                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_CO;
 498                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) &=
 499                         ~(VFC_SAA9051_BY | VFC_SAA9051_PF);
 500                 ret = vfc_update_saa9051(dev);
 501                 break;
 502         case MONO:
 503                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_CO);
 504                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) |=
 505                         (VFC_SAA9051_BY | VFC_SAA9051_PF);
 506                 ret = vfc_update_saa9051(dev);
 507                 break;
 508         default:
 509                 ret = -EINVAL;
 510                 break;
 511         };
 512
 513         return ret;
 514 }
 515
 516 int vfc_get_video_ioctl(struct inode *inode, struct file *file,
 517                         struct vfc_dev *dev, unsigned long arg)
 518 {
 519         int ret = 0;
 520         unsigned int status = NO_LOCK;
 521         unsigned char buf[1];
 522
 523         if(vfc_i2c_recvbuf(dev, VFC_SAA9051_ADDR, buf, 1)) {
 524                 printk(KERN_ERR "vfc%d: Unable to get status\n",
 525                        dev->instance);
 526                 return -EIO;
 527         }
 528
 529         if(buf[0] & VFC_SAA9051_HLOCK) {
 530                 status = NO_LOCK;
 531         } else if(buf[0] & VFC_SAA9051_FD) {
 532                 if(buf[0] & VFC_SAA9051_CD)
 533                         status = NTSC_COLOR;
 534                 else
 535                         status = NTSC_NOCOLOR;
 536         } else {
 537                 if(buf[0] & VFC_SAA9051_CD)
 538                         status = PAL_COLOR;
 539                 else
 540                         status = PAL_NOCOLOR;
 541         }
 542         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGVID) returning status 0x%x; "
 543                                 "buf[0]=%x\n", dev->instance, status, buf[0]));
 544
 545         if (copy_to_user((void *)arg,&status,sizeof(unsigned int))) {
 546                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 547                                         "vfc_get_video_ioctl\n",
 548                                         dev->instance));
 549                 return ret;
 550         }
 551         return ret;
 552 }
 553
 554 static int vfc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 555               unsigned long arg)
 556 {
 557         int ret = 0;
 558         unsigned int tmp;
 559         struct vfc_dev *dev;
 560
 561         dev = vfc_get_dev_ptr(iminor(inode));
 562         if(dev == NULL)
 563                 return -ENODEV;
 564
 565         switch(cmd & 0x0000ffff) {
 566         case VFCGCTRL:
 567 #if 0
 568                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGCTRL)\n", dev->instance));
 569 #endif
 570                 tmp = sbus_readl(&dev->regs->control);
 571                 if(copy_to_user((void *)arg, &tmp, sizeof(unsigned int))) {
 572                         ret = -EFAULT;
 573                         break;
 574                 }
 575                 ret = 0;
 576                 break;
 577         case VFCSCTRL:
 578                 ret = vfc_set_control_ioctl(inode, file, dev, arg);
 579                 break;
 580         case VFCGVID:
 581                 ret = vfc_get_video_ioctl(inode, file, dev, arg);
 582                 break;
 583         case VFCSVID:
 584                 ret = vfc_set_video_ioctl(inode, file, dev, arg);
 585                 break;
 586         case VFCHUE:
 587                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCHUE)\n", dev->instance));
 588                 if(copy_from_user(&tmp,(void *)arg,sizeof(unsigned int))) {
 589                         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer "
 590                                                 "to IOCTL(VFCHUE)", dev->instance));
 591                         ret = -EFAULT;
 592                 } else {
 593                         VFC_SAA9051_SA(dev,VFC_SAA9051_HUE) = tmp;
 594                         vfc_update_saa9051(dev);
 595                         ret = 0;
 596                 }
 597                 break;
 598         case VFCPORTCHG:
 599                 ret = vfc_port_change_ioctl(inode, file, dev, arg);
 600                 break;
 601         case VFCRDINFO:
 602                 ret = -EINVAL;
 603                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCRDINFO)\n", dev->instance));
 604                 break;
 605         default:
 606                 ret = vfc_debug(vfc_get_dev_ptr(iminor(inode)),
 607                                 cmd, arg);
 608                 break;
 609         };
 610
 611         return ret;
 612 }
 613
 614 static int vfc_mmap(struct inode *inode, struct file *file,
 615                     struct vm_area_struct *vma)
 616 {
 617         unsigned int map_size, ret, map_offset;
 618         struct vfc_dev *dev;
 619
 620         dev = vfc_get_dev_ptr(iminor(inode));
 621         if(dev == NULL)
 622                 return -ENODEV;
 623
 624         map_size = vma->vm_end - vma->vm_start;
 625         if(map_size > sizeof(struct vfc_regs))
 626                 map_size = sizeof(struct vfc_regs);
 627
 628         vma->vm_flags |=
 629                 (VM_SHM | VM_LOCKED | VM_IO | VM_MAYREAD | VM_MAYWRITE | VM_MAYSHARE);
 630         map_offset = (unsigned int) (long)dev->phys_regs;
 631         ret = io_remap_page_range(vma, vma->vm_start, map_offset, map_size,
 632                                   vma->vm_page_prot, dev->which_io);
 633
 634         if(ret)
 635                 return -EAGAIN;
 636
 637         return 0;
 638 }
 639
 640
 641 static struct file_operations vfc_fops = {
 642         .owner =        THIS_MODULE,
 643         .llseek =       no_llseek,
 644         .ioctl =        vfc_ioctl,
 645         .mmap =         vfc_mmap,
 646         .open =         vfc_open,
 647         .release =      vfc_release,
 648 };
 649
 650 static int vfc_probe(void)
 651 {
 652         struct sbus_bus *sbus;
 653         struct sbus_dev *sdev = NULL;
 654         int ret;
 655         int instance = 0, cards = 0;
 656
 657         for_all_sbusdev(sdev, sbus) {
 658                 if (strcmp(sdev->prom_name, "vfc") == 0) {
 659                         cards++;
 660                         continue;
 661                 }
 662         }
 663
 664         if (!cards)
 665                 return -ENODEV;
 666
 667         vfc_dev_lst = (struct vfc_dev **)kmalloc(sizeof(struct vfc_dev *) *
 668                                                  (cards+1),
 669                                                  GFP_KERNEL);
 670         if (vfc_dev_lst == NULL)
 671                 return -ENOMEM;
 672         memset(vfc_dev_lst, 0, sizeof(struct vfc_dev *) * (cards + 1));
 673         vfc_dev_lst[cards] = NULL;
 674
 675         ret = register_chrdev(VFC_MAJOR, vfcstr, &vfc_fops);
 676         if(ret) {
 677                 printk(KERN_ERR "Unable to get major number %d\n", VFC_MAJOR);
 678                 kfree(vfc_dev_lst);
 679                 return -EIO;
 680         }
 681         devfs_mk_dir("vfc");
 682         instance = 0;
 683         for_all_sbusdev(sdev, sbus) {
 684                 if (strcmp(sdev->prom_name, "vfc") == 0) {
 685                         vfc_dev_lst[instance]=(struct vfc_dev *)
 686                                 kmalloc(sizeof(struct vfc_dev), GFP_KERNEL);
 687                         if (vfc_dev_lst[instance] == NULL)
 688                                 return -ENOMEM;
 689                         ret = init_vfc_device(sdev,
 690                                               vfc_dev_lst[instance],
 691                                               instance);
 692                         if(ret) {
 693                                 printk(KERN_ERR "Unable to initialize"
 694                                        " vfc%d device\n",
 695                                        instance);
 696                         } else {
 697                         }
 698
 699                         instance++;
 700                         continue;
 701                 }
 702         }
 703
 704         return 0;
 705 }
 706
 707 #ifdef MODULE
 708 int init_module(void)
 709 #else
 710 int vfc_init(void)
 711 #endif
 712 {
 713         return vfc_probe();
 714 }
 715
 716 #ifdef MODULE
 717 static void deinit_vfc_device(struct vfc_dev *dev)
 718 {
 719         if(dev == NULL)
 720                 return;
 721         devfs_remove("vfc/%d", dev->instance);
 722         sbus_iounmap((unsigned long)dev->regs, sizeof(struct vfc_regs));
 723         kfree(dev);
 724 }
 725
 726 void cleanup_module(void)
 727 {
 728         struct vfc_dev **devp;
 729
 730         unregister_chrdev(VFC_MAJOR,vfcstr);
 731
 732         for (devp = vfc_dev_lst; *devp; devp++)
 733                 deinit_vfc_device(*devp);
 734
 735         devfs_remove("vfc");
 736         kfree(vfc_dev_lst);
 737         return;
 738 }
 739 #endif
 740
 741 MODULE_LICENSE("GPL");
 742