git.oblomov.eu Git - linux-2.6/blob - 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         dev->busy=0;
 141         return 0;
 142 }
 143
 144 int init_vfc_device(struct sbus_dev *sdev,struct vfc_dev *dev, int instance)
 145 {
 146         if(dev == NULL) {
 147                 printk(KERN_ERR "VFC: Bogus pointer passed\n");
 148                 return -ENOMEM;
 149         }
 150         printk("Initializing vfc%d\n",instance);
 151         dev->regs = NULL;
 152         dev->regs = (volatile struct vfc_regs __iomem *)
 153                 sbus_ioremap(&sdev->resource[0], 0,
 154                              sizeof(struct vfc_regs), vfcstr);
 155         dev->which_io = sdev->reg_addrs[0].which_io;
 156         dev->phys_regs = (struct vfc_regs *) sdev->reg_addrs[0].phys_addr;
 157         if (dev->regs == NULL)
 158                 return -EIO;
 159
 160         printk("vfc%d: registers mapped at phys_addr: 0x%lx\n    virt_addr: 0x%lx\n",
 161                instance,(unsigned long)sdev->reg_addrs[0].phys_addr,(unsigned long)dev->regs);
 162
 163         if (init_vfc_devstruct(dev, instance))
 164                 return -EINVAL;
 165         if (init_vfc_hw(dev))
 166                 return -EIO;
 167
 168         devfs_mk_cdev(MKDEV(VFC_MAJOR, instance),
 169                         S_IFCHR | S_IRUSR | S_IWUSR,
 170                         "vfc/%d", instance);
 171         return 0;
 172 }
 173
 174
 175 struct vfc_dev *vfc_get_dev_ptr(int instance)
 176 {
 177         return vfc_dev_lst[instance];
 178 }
 179
 180 static DEFINE_SPINLOCK(vfc_dev_lock);
 181
 182 static int vfc_open(struct inode *inode, struct file *file)
 183 {
 184         struct vfc_dev *dev;
 185
 186         spin_lock(&vfc_dev_lock);
 187         dev = vfc_get_dev_ptr(iminor(inode));
 188         if (dev == NULL) {
 189                 spin_unlock(&vfc_dev_lock);
 190                 return -ENODEV;
 191         }
 192         if (dev->busy) {
 193                 spin_unlock(&vfc_dev_lock);
 194                 return -EBUSY;
 195         }
 196
 197         dev->busy = 1;
 198         spin_unlock(&vfc_dev_lock);
 199
 200         vfc_lock_device(dev);
 201
 202         vfc_csr_init(dev);
 203         vfc_pcf8584_init(dev);
 204         vfc_init_i2c_bus(dev);
 205         vfc_saa9051_init(dev);
 206         vfc_memptr_reset(dev);
 207         vfc_captstat_reset(dev);
 208
 209         vfc_unlock_device(dev);
 210         return 0;
 211 }
 212
 213 static int vfc_release(struct inode *inode,struct file *file)
 214 {
 215         struct vfc_dev *dev;
 216
 217         spin_lock(&vfc_dev_lock);
 218         dev = vfc_get_dev_ptr(iminor(inode));
 219         if (!dev || !dev->busy) {
 220                 spin_unlock(&vfc_dev_lock);
 221                 return -EINVAL;
 222         }
 223         dev->busy = 0;
 224         spin_unlock(&vfc_dev_lock);
 225         return 0;
 226 }
 227
 228 static int vfc_debug(struct vfc_dev *dev, int cmd, void __user *argp)
 229 {
 230         struct vfc_debug_inout inout;
 231         unsigned char *buffer;
 232
 233         if (!capable(CAP_SYS_ADMIN))
 234                 return -EPERM;
 235
 236         switch(cmd) {
 237         case VFC_I2C_SEND:
 238                 if(copy_from_user(&inout, argp, sizeof(inout)))
 239                         return -EFAULT;
 240
 241                 buffer = kmalloc(inout.len, GFP_KERNEL);
 242                 if (buffer == NULL)
 243                         return -ENOMEM;
 244
 245                 if(copy_from_user(buffer, inout.buffer, inout.len)) {
 246                         kfree(buffer);
 247                         return -EFAULT;
 248                 }
 249
 250
 251                 vfc_lock_device(dev);
 252                 inout.ret=
 253                         vfc_i2c_sendbuf(dev,inout.addr & 0xff,
 254                                         buffer,inout.len);
 255
 256                 if (copy_to_user(argp,&inout,sizeof(inout))) {
 257                         kfree(buffer);
 258                         return -EFAULT;
 259                 }
 260                 vfc_unlock_device(dev);
 261
 262                 break;
 263         case VFC_I2C_RECV:
 264                 if (copy_from_user(&inout, argp, sizeof(inout)))
 265                         return -EFAULT;
 266
 267                 buffer = kmalloc(inout.len, GFP_KERNEL);
 268                 if (buffer == NULL)
 269                         return -ENOMEM;
 270
 271                 memset(buffer,0,inout.len);
 272                 vfc_lock_device(dev);
 273                 inout.ret=
 274                         vfc_i2c_recvbuf(dev,inout.addr & 0xff
 275                                         ,buffer,inout.len);
 276                 vfc_unlock_device(dev);
 277
 278                 if (copy_to_user(inout.buffer, buffer, inout.len)) {
 279                         kfree(buffer);
 280                         return -EFAULT;
 281                 }
 282                 if (copy_to_user(argp,&inout,sizeof(inout))) {
 283                         kfree(buffer);
 284                         return -EFAULT;
 285                 }
 286                 kfree(buffer);
 287                 break;
 288         default:
 289                 return -EINVAL;
 290         };
 291
 292         return 0;
 293 }
 294
 295 int vfc_capture_start(struct vfc_dev *dev)
 296 {
 297         vfc_captstat_reset(dev);
 298         dev->control_reg = sbus_readl(&dev->regs->control);
 299         if((dev->control_reg & VFC_STATUS_CAPTURE)) {
 300                 printk(KERN_ERR "vfc%d: vfc capture status not reset\n",
 301                        dev->instance);
 302                 return -EIO;
 303         }
 304
 305         vfc_lock_device(dev);
 306         dev->control_reg &= ~VFC_CONTROL_CAPTURE;
 307         sbus_writel(dev->control_reg, &dev->regs->control);
 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         vfc_unlock_device(dev);
 313
 314         return 0;
 315 }
 316
 317 int vfc_capture_poll(struct vfc_dev *dev)
 318 {
 319         int timeout = 1000;
 320
 321         while (!timeout--) {
 322                 if (sbus_readl(&dev->regs->control) & VFC_STATUS_CAPTURE)
 323                         break;
 324                 vfc_i2c_delay_no_busy(dev, 100);
 325         }
 326         if(!timeout) {
 327                 printk(KERN_WARNING "vfc%d: capture timed out\n",
 328                        dev->instance);
 329                 return -ETIMEDOUT;
 330         }
 331         return 0;
 332 }
 333
 334
 335
 336 static int vfc_set_control_ioctl(struct inode *inode, struct file *file,
 337                           struct vfc_dev *dev, unsigned long arg)
 338 {
 339         int setcmd, ret = 0;
 340
 341         if (copy_from_user(&setcmd,(void __user *)arg,sizeof(unsigned int)))
 342                 return -EFAULT;
 343
 344         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSCTRL) arg=0x%x\n",
 345                                 dev->instance,setcmd));
 346
 347         switch(setcmd) {
 348         case MEMPRST:
 349                 vfc_lock_device(dev);
 350                 vfc_memptr_reset(dev);
 351                 vfc_unlock_device(dev);
 352                 ret=0;
 353                 break;
 354         case CAPTRCMD:
 355                 vfc_capture_start(dev);
 356                 vfc_capture_poll(dev);
 357                 break;
 358         case DIAGMODE:
 359                 if(capable(CAP_SYS_ADMIN)) {
 360                         vfc_lock_device(dev);
 361                         dev->control_reg |= VFC_CONTROL_DIAGMODE;
 362                         sbus_writel(dev->control_reg, &dev->regs->control);
 363                         vfc_unlock_device(dev);
 364                         ret = 0;
 365                 } else {
 366                         ret = -EPERM;
 367                 }
 368                 break;
 369         case NORMMODE:
 370                 vfc_lock_device(dev);
 371                 dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
 372                 sbus_writel(dev->control_reg, &dev->regs->control);
 373                 vfc_unlock_device(dev);
 374                 ret = 0;
 375                 break;
 376         case CAPTRSTR:
 377                 vfc_capture_start(dev);
 378                 ret = 0;
 379                 break;
 380         case CAPTRWAIT:
 381                 vfc_capture_poll(dev);
 382                 ret = 0;
 383                 break;
 384         default:
 385                 ret = -EINVAL;
 386                 break;
 387         };
 388
 389         return ret;
 390 }
 391
 392
 393 int vfc_port_change_ioctl(struct inode *inode, struct file *file,
 394                           struct vfc_dev *dev, unsigned long arg)
 395 {
 396         int ret = 0;
 397         int cmd;
 398
 399         if(copy_from_user(&cmd, (void __user *)arg, sizeof(unsigned int))) {
 400                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 401                                         "vfc_port_change_ioctl\n",
 402                                         dev->instance));
 403                 return -EFAULT;
 404         }
 405
 406         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCPORTCHG) arg=0x%x\n",
 407                                 dev->instance, cmd));
 408
 409         switch(cmd) {
 410         case 1:
 411         case 2:
 412                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x72;
 413                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x52;
 414                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0x36;
 415                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0x18;
 416                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) = VFC_SAA9051_BP2;
 417                 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_CT | VFC_SAA9051_SS3;
 418                 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0x3e;
 419                 break;
 420         case 3:
 421                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x3a;
 422                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x17;
 423                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0xfa;
 424                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0xde;
 425                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) =
 426                         VFC_SAA9051_BY | VFC_SAA9051_PF | VFC_SAA9051_BP2;
 427                 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_YC;
 428                 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0;
 429                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
 430                         ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 431                 break;
 432         default:
 433                 ret = -EINVAL;
 434                 return ret;
 435                 break;
 436         }
 437
 438         switch(cmd) {
 439         case 1:
 440                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |=
 441                         (VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 442                 break;
 443         case 2:
 444                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
 445                         ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 446                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |= VFC_SAA9051_SS0;
 447                 break;
 448         case 3:
 449                 break;
 450         default:
 451                 ret = -EINVAL;
 452                 return ret;
 453                 break;
 454         }
 455         VFC_SAA9051_SA(dev,VFC_SAA9051_C3) &= ~(VFC_SAA9051_SS2);
 456         ret=vfc_update_saa9051(dev);
 457         udelay(500);
 458         VFC_SAA9051_SA(dev,VFC_SAA9051_C3) |= (VFC_SAA9051_SS2);
 459         ret=vfc_update_saa9051(dev);
 460         return ret;
 461 }
 462
 463 int vfc_set_video_ioctl(struct inode *inode, struct file *file,
 464                         struct vfc_dev *dev, unsigned long arg)
 465 {
 466         int ret = 0;
 467         int cmd;
 468
 469         if(copy_from_user(&cmd, (void __user *)arg, sizeof(unsigned int))) {
 470                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 471                                         "vfc_set_video_ioctl\n",
 472                                         dev->instance));
 473                 return ret;
 474         }
 475
 476         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSVID) arg=0x%x\n",
 477                                 dev->instance, cmd));
 478         switch(cmd) {
 479         case STD_NTSC:
 480                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~VFC_SAA9051_ALT;
 481                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_YPN |
 482                         VFC_SAA9051_CCFR0 | VFC_SAA9051_CCFR1 | VFC_SAA9051_FS;
 483                 ret = vfc_update_saa9051(dev);
 484                 break;
 485         case STD_PAL:
 486                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_YPN |
 487                                                         VFC_SAA9051_CCFR1 |
 488                                                         VFC_SAA9051_CCFR0 |
 489                                                         VFC_SAA9051_FS);
 490                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_ALT;
 491                 ret = vfc_update_saa9051(dev);
 492                 break;
 493
 494         case COLOR_ON:
 495                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_CO;
 496                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) &=
 497                         ~(VFC_SAA9051_BY | VFC_SAA9051_PF);
 498                 ret = vfc_update_saa9051(dev);
 499                 break;
 500         case MONO:
 501                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_CO);
 502                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) |=
 503                         (VFC_SAA9051_BY | VFC_SAA9051_PF);
 504                 ret = vfc_update_saa9051(dev);
 505                 break;
 506         default:
 507                 ret = -EINVAL;
 508                 break;
 509         };
 510
 511         return ret;
 512 }
 513
 514 int vfc_get_video_ioctl(struct inode *inode, struct file *file,
 515                         struct vfc_dev *dev, unsigned long arg)
 516 {
 517         int ret = 0;
 518         unsigned int status = NO_LOCK;
 519         unsigned char buf[1];
 520
 521         if(vfc_i2c_recvbuf(dev, VFC_SAA9051_ADDR, buf, 1)) {
 522                 printk(KERN_ERR "vfc%d: Unable to get status\n",
 523                        dev->instance);
 524                 return -EIO;
 525         }
 526
 527         if(buf[0] & VFC_SAA9051_HLOCK) {
 528                 status = NO_LOCK;
 529         } else if(buf[0] & VFC_SAA9051_FD) {
 530                 if(buf[0] & VFC_SAA9051_CD)
 531                         status = NTSC_COLOR;
 532                 else
 533                         status = NTSC_NOCOLOR;
 534         } else {
 535                 if(buf[0] & VFC_SAA9051_CD)
 536                         status = PAL_COLOR;
 537                 else
 538                         status = PAL_NOCOLOR;
 539         }
 540         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGVID) returning status 0x%x; "
 541                                 "buf[0]=%x\n", dev->instance, status, buf[0]));
 542
 543         if (copy_to_user((void __user *)arg,&status,sizeof(unsigned int))) {
 544                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 545                                         "vfc_get_video_ioctl\n",
 546                                         dev->instance));
 547                 return ret;
 548         }
 549         return ret;
 550 }
 551
 552 static int vfc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 553               unsigned long arg)
 554 {
 555         int ret = 0;
 556         unsigned int tmp;
 557         struct vfc_dev *dev;
 558         void __user *argp = (void __user *)arg;
 559
 560         dev = vfc_get_dev_ptr(iminor(inode));
 561         if(dev == NULL)
 562                 return -ENODEV;
 563
 564         switch(cmd & 0x0000ffff) {
 565         case VFCGCTRL:
 566 #if 0
 567                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGCTRL)\n", dev->instance));
 568 #endif
 569                 tmp = sbus_readl(&dev->regs->control);
 570                 if(copy_to_user(argp, &tmp, sizeof(unsigned int))) {
 571                         ret = -EFAULT;
 572                         break;
 573                 }
 574                 ret = 0;
 575                 break;
 576         case VFCSCTRL:
 577                 ret = vfc_set_control_ioctl(inode, file, dev, arg);
 578                 break;
 579         case VFCGVID:
 580                 ret = vfc_get_video_ioctl(inode, file, dev, arg);
 581                 break;
 582         case VFCSVID:
 583                 ret = vfc_set_video_ioctl(inode, file, dev, arg);
 584                 break;
 585         case VFCHUE:
 586                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCHUE)\n", dev->instance));
 587                 if(copy_from_user(&tmp,argp,sizeof(unsigned int))) {
 588                         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer "
 589                                                 "to IOCTL(VFCHUE)", dev->instance));
 590                         ret = -EFAULT;
 591                 } else {
 592                         VFC_SAA9051_SA(dev,VFC_SAA9051_HUE) = tmp;
 593                         vfc_update_saa9051(dev);
 594                         ret = 0;
 595                 }
 596                 break;
 597         case VFCPORTCHG:
 598                 ret = vfc_port_change_ioctl(inode, file, dev, arg);
 599                 break;
 600         case VFCRDINFO:
 601                 ret = -EINVAL;
 602                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCRDINFO)\n", dev->instance));
 603                 break;
 604         default:
 605                 ret = vfc_debug(vfc_get_dev_ptr(iminor(inode)), cmd, argp);
 606                 break;
 607         };
 608
 609         return ret;
 610 }
 611
 612 static int vfc_mmap(struct file *file, struct vm_area_struct *vma)
 613 {
 614         unsigned int map_size, ret, map_offset;
 615         struct vfc_dev *dev;
 616
 617         dev = vfc_get_dev_ptr(iminor(file->f_dentry->d_inode));
 618         if(dev == NULL)
 619                 return -ENODEV;
 620
 621         map_size = vma->vm_end - vma->vm_start;
 622         if(map_size > sizeof(struct vfc_regs))
 623                 map_size = sizeof(struct vfc_regs);
 624
 625         vma->vm_flags |=
 626                 (VM_SHM | VM_LOCKED | VM_IO | VM_MAYREAD | VM_MAYWRITE | VM_MAYSHARE);
 627         map_offset = (unsigned int) (long)dev->phys_regs;
 628         ret = io_remap_pfn_range(vma, vma->vm_start,
 629                                   MK_IOSPACE_PFN(dev->which_io,
 630                                         map_offset >> PAGE_SHIFT),
 631                                   map_size, vma->vm_page_prot);
 632
 633         if(ret)
 634                 return -EAGAIN;
 635
 636         return 0;
 637 }
 638
 639
 640 static struct file_operations vfc_fops = {
 641         .owner =        THIS_MODULE,
 642         .llseek =       no_llseek,
 643         .ioctl =        vfc_ioctl,
 644         .mmap =         vfc_mmap,
 645         .open =         vfc_open,
 646         .release =      vfc_release,
 647 };
 648
 649 static int vfc_probe(void)
 650 {
 651         struct sbus_bus *sbus;
 652         struct sbus_dev *sdev = NULL;
 653         int ret;
 654         int instance = 0, cards = 0;
 655
 656         for_all_sbusdev(sdev, sbus) {
 657                 if (strcmp(sdev->prom_name, "vfc") == 0) {
 658                         cards++;
 659                         continue;
 660                 }
 661         }
 662
 663         if (!cards)
 664                 return -ENODEV;
 665
 666         vfc_dev_lst = (struct vfc_dev **)kmalloc(sizeof(struct vfc_dev *) *
 667                                                  (cards+1),
 668                                                  GFP_KERNEL);
 669         if (vfc_dev_lst == NULL)
 670                 return -ENOMEM;
 671         memset(vfc_dev_lst, 0, sizeof(struct vfc_dev *) * (cards + 1));
 672         vfc_dev_lst[cards] = NULL;
 673
 674         ret = register_chrdev(VFC_MAJOR, vfcstr, &vfc_fops);
 675         if(ret) {
 676                 printk(KERN_ERR "Unable to get major number %d\n", VFC_MAJOR);
 677                 kfree(vfc_dev_lst);
 678                 return -EIO;
 679         }
 680         devfs_mk_dir("vfc");
 681         instance = 0;
 682         for_all_sbusdev(sdev, sbus) {
 683                 if (strcmp(sdev->prom_name, "vfc") == 0) {
 684                         vfc_dev_lst[instance]=(struct vfc_dev *)
 685                                 kmalloc(sizeof(struct vfc_dev), GFP_KERNEL);
 686                         if (vfc_dev_lst[instance] == NULL)
 687                                 return -ENOMEM;
 688                         ret = init_vfc_device(sdev,
 689                                               vfc_dev_lst[instance],
 690                                               instance);
 691                         if(ret) {
 692                                 printk(KERN_ERR "Unable to initialize"
 693                                        " vfc%d device\n",
 694                                        instance);
 695                         } else {
 696                         }
 697
 698                         instance++;
 699                         continue;
 700                 }
 701         }
 702
 703         return 0;
 704 }
 705
 706 #ifdef MODULE
 707 int init_module(void)
 708 #else
 709 int vfc_init(void)
 710 #endif
 711 {
 712         return vfc_probe();
 713 }
 714
 715 #ifdef MODULE
 716 static void deinit_vfc_device(struct vfc_dev *dev)
 717 {
 718         if(dev == NULL)
 719                 return;
 720         devfs_remove("vfc/%d", dev->instance);
 721         sbus_iounmap(dev->regs, sizeof(struct vfc_regs));
 722         kfree(dev);
 723 }
 724
 725 void cleanup_module(void)
 726 {
 727         struct vfc_dev **devp;
 728
 729         unregister_chrdev(VFC_MAJOR,vfcstr);
 730
 731         for (devp = vfc_dev_lst; *devp; devp++)
 732                 deinit_vfc_device(*devp);
 733
 734         devfs_remove("vfc");
 735         kfree(vfc_dev_lst);
 736         return;
 737 }
 738 #endif
 739
 740 MODULE_LICENSE("GPL");
 741