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/fs.h>
  23 #include <linux/delay.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/mutex.h>
  26 #include <linux/mm.h>
  27 #include <linux/smp_lock.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 const struct file_operations vfc_fops;
  48 static 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 static void vfc_lock_device(struct vfc_dev *dev)
  58 {
  59         mutex_lock(&dev->device_lock_mtx);
  60 }
  61
  62 static void vfc_unlock_device(struct vfc_dev *dev)
  63 {
  64         mutex_unlock(&dev->device_lock_mtx);
  65 }
  66
  67
  68 static 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 static 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 static 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 static 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 static 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 static int init_vfc_devstruct(struct vfc_dev *dev, int instance)
 136 {
 137         dev->instance=instance;
 138         mutex_init(&dev->device_lock_mtx);
 139         dev->control_reg=0;
 140         dev->busy=0;
 141         return 0;
 142 }
 143
 144 static int init_vfc_device(struct sbus_dev *sdev,struct vfc_dev *dev,
 145                            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 __iomem *)
 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         return 0;
 169 }
 170
 171
 172 static struct vfc_dev *vfc_get_dev_ptr(int instance)
 173 {
 174         return vfc_dev_lst[instance];
 175 }
 176
 177 static DEFINE_SPINLOCK(vfc_dev_lock);
 178
 179 static int vfc_open(struct inode *inode, struct file *file)
 180 {
 181         struct vfc_dev *dev;
 182
 183         lock_kernel();
 184         spin_lock(&vfc_dev_lock);
 185         dev = vfc_get_dev_ptr(iminor(inode));
 186         if (dev == NULL) {
 187                 spin_unlock(&vfc_dev_lock);
 188                 unlock_kernel();
 189                 return -ENODEV;
 190         }
 191         if (dev->busy) {
 192                 spin_unlock(&vfc_dev_lock);
 193                 unlock_kernel();
 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         unlock_kernel();
 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, void __user *argp)
 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, argp, sizeof(inout)))
 240                         return -EFAULT;
 241
 242                 buffer = kmalloc(inout.len, GFP_KERNEL);
 243                 if (buffer == NULL)
 244                         return -ENOMEM;
 245
 246                 if(copy_from_user(buffer, inout.buffer, inout.len)) {
 247                         kfree(buffer);
 248                         return -EFAULT;
 249                 }
 250
 251
 252                 vfc_lock_device(dev);
 253                 inout.ret=
 254                         vfc_i2c_sendbuf(dev,inout.addr & 0xff,
 255                                         buffer,inout.len);
 256
 257                 if (copy_to_user(argp,&inout,sizeof(inout))) {
 258                         vfc_unlock_device(dev);
 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, argp, sizeof(inout)))
 267                         return -EFAULT;
 268
 269                 buffer = kzalloc(inout.len, GFP_KERNEL);
 270                 if (buffer == NULL)
 271                         return -ENOMEM;
 272
 273                 vfc_lock_device(dev);
 274                 inout.ret=
 275                         vfc_i2c_recvbuf(dev,inout.addr & 0xff
 276                                         ,buffer,inout.len);
 277                 vfc_unlock_device(dev);
 278
 279                 if (copy_to_user(inout.buffer, buffer, inout.len)) {
 280                         kfree(buffer);
 281                         return -EFAULT;
 282                 }
 283                 if (copy_to_user(argp,&inout,sizeof(inout))) {
 284                         kfree(buffer);
 285                         return -EFAULT;
 286                 }
 287                 kfree(buffer);
 288                 break;
 289         default:
 290                 return -EINVAL;
 291         };
 292
 293         return 0;
 294 }
 295
 296 static int vfc_capture_start(struct vfc_dev *dev)
 297 {
 298         vfc_captstat_reset(dev);
 299         dev->control_reg = sbus_readl(&dev->regs->control);
 300         if((dev->control_reg & VFC_STATUS_CAPTURE)) {
 301                 printk(KERN_ERR "vfc%d: vfc capture status not reset\n",
 302                        dev->instance);
 303                 return -EIO;
 304         }
 305
 306         vfc_lock_device(dev);
 307         dev->control_reg &= ~VFC_CONTROL_CAPTURE;
 308         sbus_writel(dev->control_reg, &dev->regs->control);
 309         dev->control_reg |= VFC_CONTROL_CAPTURE;
 310         sbus_writel(dev->control_reg, &dev->regs->control);
 311         dev->control_reg &= ~VFC_CONTROL_CAPTURE;
 312         sbus_writel(dev->control_reg, &dev->regs->control);
 313         vfc_unlock_device(dev);
 314
 315         return 0;
 316 }
 317
 318 static int vfc_capture_poll(struct vfc_dev *dev)
 319 {
 320         int timeout = 1000;
 321
 322         while (!timeout--) {
 323                 if (sbus_readl(&dev->regs->control) & VFC_STATUS_CAPTURE)
 324                         break;
 325                 vfc_i2c_delay_no_busy(dev, 100);
 326         }
 327         if(!timeout) {
 328                 printk(KERN_WARNING "vfc%d: capture timed out\n",
 329                        dev->instance);
 330                 return -ETIMEDOUT;
 331         }
 332         return 0;
 333 }
 334
 335
 336
 337 static int vfc_set_control_ioctl(struct inode *inode, struct file *file,
 338                           struct vfc_dev *dev, unsigned long arg)
 339 {
 340         int setcmd, ret = 0;
 341
 342         if (copy_from_user(&setcmd,(void __user *)arg,sizeof(unsigned int)))
 343                 return -EFAULT;
 344
 345         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSCTRL) arg=0x%x\n",
 346                                 dev->instance,setcmd));
 347
 348         switch(setcmd) {
 349         case MEMPRST:
 350                 vfc_lock_device(dev);
 351                 vfc_memptr_reset(dev);
 352                 vfc_unlock_device(dev);
 353                 ret=0;
 354                 break;
 355         case CAPTRCMD:
 356                 vfc_capture_start(dev);
 357                 vfc_capture_poll(dev);
 358                 break;
 359         case DIAGMODE:
 360                 if(capable(CAP_SYS_ADMIN)) {
 361                         vfc_lock_device(dev);
 362                         dev->control_reg |= VFC_CONTROL_DIAGMODE;
 363                         sbus_writel(dev->control_reg, &dev->regs->control);
 364                         vfc_unlock_device(dev);
 365                         ret = 0;
 366                 } else {
 367                         ret = -EPERM;
 368                 }
 369                 break;
 370         case NORMMODE:
 371                 vfc_lock_device(dev);
 372                 dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
 373                 sbus_writel(dev->control_reg, &dev->regs->control);
 374                 vfc_unlock_device(dev);
 375                 ret = 0;
 376                 break;
 377         case CAPTRSTR:
 378                 vfc_capture_start(dev);
 379                 ret = 0;
 380                 break;
 381         case CAPTRWAIT:
 382                 vfc_capture_poll(dev);
 383                 ret = 0;
 384                 break;
 385         default:
 386                 ret = -EINVAL;
 387                 break;
 388         };
 389
 390         return ret;
 391 }
 392
 393
 394 static int vfc_port_change_ioctl(struct inode *inode, struct file *file,
 395                                  struct vfc_dev *dev, unsigned long arg)
 396 {
 397         int ret = 0;
 398         int cmd;
 399
 400         if(copy_from_user(&cmd, (void __user *)arg, sizeof(unsigned int))) {
 401                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 402                                         "vfc_port_change_ioctl\n",
 403                                         dev->instance));
 404                 return -EFAULT;
 405         }
 406
 407         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCPORTCHG) arg=0x%x\n",
 408                                 dev->instance, cmd));
 409
 410         switch(cmd) {
 411         case 1:
 412         case 2:
 413                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x72;
 414                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x52;
 415                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0x36;
 416                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0x18;
 417                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) = VFC_SAA9051_BP2;
 418                 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_CT | VFC_SAA9051_SS3;
 419                 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0x3e;
 420                 break;
 421         case 3:
 422                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x3a;
 423                 VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x17;
 424                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0xfa;
 425                 VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0xde;
 426                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) =
 427                         VFC_SAA9051_BY | VFC_SAA9051_PF | VFC_SAA9051_BP2;
 428                 VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_YC;
 429                 VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0;
 430                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
 431                         ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 432                 break;
 433         default:
 434                 ret = -EINVAL;
 435                 return ret;
 436                 break;
 437         }
 438
 439         switch(cmd) {
 440         case 1:
 441                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |=
 442                         (VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 443                 break;
 444         case 2:
 445                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &=
 446                         ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
 447                 VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |= VFC_SAA9051_SS0;
 448                 break;
 449         case 3:
 450                 break;
 451         default:
 452                 ret = -EINVAL;
 453                 return ret;
 454                 break;
 455         }
 456         VFC_SAA9051_SA(dev,VFC_SAA9051_C3) &= ~(VFC_SAA9051_SS2);
 457         ret=vfc_update_saa9051(dev);
 458         udelay(500);
 459         VFC_SAA9051_SA(dev,VFC_SAA9051_C3) |= (VFC_SAA9051_SS2);
 460         ret=vfc_update_saa9051(dev);
 461         return ret;
 462 }
 463
 464 static int vfc_set_video_ioctl(struct inode *inode, struct file *file,
 465                                struct vfc_dev *dev, unsigned long arg)
 466 {
 467         int ret = 0;
 468         int cmd;
 469
 470         if(copy_from_user(&cmd, (void __user *)arg, sizeof(unsigned int))) {
 471                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 472                                         "vfc_set_video_ioctl\n",
 473                                         dev->instance));
 474                 return ret;
 475         }
 476
 477         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSVID) arg=0x%x\n",
 478                                 dev->instance, cmd));
 479         switch(cmd) {
 480         case STD_NTSC:
 481                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~VFC_SAA9051_ALT;
 482                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_YPN |
 483                         VFC_SAA9051_CCFR0 | VFC_SAA9051_CCFR1 | VFC_SAA9051_FS;
 484                 ret = vfc_update_saa9051(dev);
 485                 break;
 486         case STD_PAL:
 487                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_YPN |
 488                                                         VFC_SAA9051_CCFR1 |
 489                                                         VFC_SAA9051_CCFR0 |
 490                                                         VFC_SAA9051_FS);
 491                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_ALT;
 492                 ret = vfc_update_saa9051(dev);
 493                 break;
 494
 495         case COLOR_ON:
 496                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_CO;
 497                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) &=
 498                         ~(VFC_SAA9051_BY | VFC_SAA9051_PF);
 499                 ret = vfc_update_saa9051(dev);
 500                 break;
 501         case MONO:
 502                 VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_CO);
 503                 VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) |=
 504                         (VFC_SAA9051_BY | VFC_SAA9051_PF);
 505                 ret = vfc_update_saa9051(dev);
 506                 break;
 507         default:
 508                 ret = -EINVAL;
 509                 break;
 510         };
 511
 512         return ret;
 513 }
 514
 515 static int vfc_get_video_ioctl(struct inode *inode, struct file *file,
 516                                struct vfc_dev *dev, unsigned long arg)
 517 {
 518         int ret = 0;
 519         unsigned int status = NO_LOCK;
 520         unsigned char buf[1];
 521
 522         if(vfc_i2c_recvbuf(dev, VFC_SAA9051_ADDR, buf, 1)) {
 523                 printk(KERN_ERR "vfc%d: Unable to get status\n",
 524                        dev->instance);
 525                 return -EIO;
 526         }
 527
 528         if(buf[0] & VFC_SAA9051_HLOCK) {
 529                 status = NO_LOCK;
 530         } else if(buf[0] & VFC_SAA9051_FD) {
 531                 if(buf[0] & VFC_SAA9051_CD)
 532                         status = NTSC_COLOR;
 533                 else
 534                         status = NTSC_NOCOLOR;
 535         } else {
 536                 if(buf[0] & VFC_SAA9051_CD)
 537                         status = PAL_COLOR;
 538                 else
 539                         status = PAL_NOCOLOR;
 540         }
 541         VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGVID) returning status 0x%x; "
 542                                 "buf[0]=%x\n", dev->instance, status, buf[0]));
 543
 544         if (copy_to_user((void __user *)arg,&status,sizeof(unsigned int))) {
 545                 VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
 546                                         "vfc_get_video_ioctl\n",
 547                                         dev->instance));
 548                 return ret;
 549         }
 550         return ret;
 551 }
 552
 553 static int vfc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 554               unsigned long arg)
 555 {
 556         int ret = 0;
 557         unsigned int tmp;
 558         struct vfc_dev *dev;
 559         void __user *argp = (void __user *)arg;
 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(argp, &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,argp,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)), cmd, argp);
 607                 break;
 608         };
 609
 610         return ret;
 611 }
 612
 613 static int vfc_mmap(struct file *file, struct vm_area_struct *vma)
 614 {
 615         unsigned int map_size, ret, map_offset;
 616         struct vfc_dev *dev;
 617
 618         dev = vfc_get_dev_ptr(iminor(file->f_path.dentry->d_inode));
 619         if(dev == NULL)
 620                 return -ENODEV;
 621
 622         map_size = vma->vm_end - vma->vm_start;
 623         if(map_size > sizeof(struct vfc_regs))
 624                 map_size = sizeof(struct vfc_regs);
 625
 626         vma->vm_flags |=
 627                 (VM_MAYREAD | VM_MAYWRITE | VM_MAYSHARE);
 628         map_offset = (unsigned int) (long)dev->phys_regs;
 629         ret = io_remap_pfn_range(vma, vma->vm_start,
 630                                   MK_IOSPACE_PFN(dev->which_io,
 631                                         map_offset >> PAGE_SHIFT),
 632                                   map_size, vma->vm_page_prot);
 633
 634         if(ret)
 635                 return -EAGAIN;
 636
 637         return 0;
 638 }
 639
 640
 641 static const 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 = kcalloc(cards + 1, sizeof(struct vfc_dev*), GFP_KERNEL);
 668         if (vfc_dev_lst == NULL)
 669                 return -ENOMEM;
 670         vfc_dev_lst[cards] = NULL;
 671
 672         ret = register_chrdev(VFC_MAJOR, vfcstr, &vfc_fops);
 673         if(ret) {
 674                 printk(KERN_ERR "Unable to get major number %d\n", VFC_MAJOR);
 675                 kfree(vfc_dev_lst);
 676                 return -EIO;
 677         }
 678         instance = 0;
 679         for_all_sbusdev(sdev, sbus) {
 680                 if (strcmp(sdev->prom_name, "vfc") == 0) {
 681                         vfc_dev_lst[instance]=(struct vfc_dev *)
 682                                 kmalloc(sizeof(struct vfc_dev), GFP_KERNEL);
 683                         if (vfc_dev_lst[instance] == NULL)
 684                                 return -ENOMEM;
 685                         ret = init_vfc_device(sdev,
 686                                               vfc_dev_lst[instance],
 687                                               instance);
 688                         if(ret) {
 689                                 printk(KERN_ERR "Unable to initialize"
 690                                        " vfc%d device\n",
 691                                        instance);
 692                         } else {
 693                         }
 694
 695                         instance++;
 696                         continue;
 697                 }
 698         }
 699
 700         return 0;
 701 }
 702
 703 #ifdef MODULE
 704 int init_module(void)
 705 #else
 706 int vfc_init(void)
 707 #endif
 708 {
 709         return vfc_probe();
 710 }
 711
 712 #ifdef MODULE
 713 static void deinit_vfc_device(struct vfc_dev *dev)
 714 {
 715         if(dev == NULL)
 716                 return;
 717         sbus_iounmap(dev->regs, sizeof(struct vfc_regs));
 718         kfree(dev);
 719 }
 720
 721 void cleanup_module(void)
 722 {
 723         struct vfc_dev **devp;
 724
 725         unregister_chrdev(VFC_MAJOR,vfcstr);
 726
 727         for (devp = vfc_dev_lst; *devp; devp++)
 728                 deinit_vfc_device(*devp);
 729
 730         kfree(vfc_dev_lst);
 731         return;
 732 }
 733 #endif
 734
 735 MODULE_LICENSE("GPL");
 736