patch-2.1.34 linux/drivers/sbus/char/vfc_dev.c

• Lines: 694
• Date: Fri Apr 11 10:47:37 1997
• Orig file: v2.1.33/linux/drivers/sbus/char/vfc_dev.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.33/linux/drivers/sbus/char/vfc_dev.c linux/drivers/sbus/char/vfc_dev.c
@@ -0,0 +1,693 @@
+/*
+ * drivers/sbus/char/vfc_dev.c
+ *
+ * Driver for the Videopix Frame Grabber.
+ * 
+ * In order to use the VFC you need to progeam the video controller
+ * chip. This chip is the Phillips SAA9051.  You need to call their
+ * documentation ordering line to get the docs.
+ *
+ * Their is very little documentation on the VFC itself.  There is
+ * some useful info that can be found in the manuals that come with
+ * the card.  I will hopefully write some better docs at a later date.
+ *
+ * Copyright (C) 1996 Manish Vachharajani (mvachhar@noc.rutgers.edu)
+ * */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/sbus.h>
+#include <asm/delay.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/uaccess.h>
+
+#define VFC_MAJOR (60)
+
+#if 0
+#define VFC_DEBUG
+#endif
+
+#include "vfc.h"
+#include <asm/vfc_ioctls.h>
+
+struct vfc_dev **vfc_dev_lst;
+static char vfcstr[]="vfc";
+static unsigned char saa9051_init_array[VFC_SAA9051_NR]=
+{ 0x00, 0x64, 0x72, 0x52,
+  0x36, 0x18, 0xff, 0x20,
+  0xfc, 0x77, 0xe3, 0x50,
+  0x3e};
+
+void vfc_lock_device(struct vfc_dev *dev) {
+	down(&dev->device_lock_sem);
+}
+
+void vfc_unlock_device(struct vfc_dev *dev) {
+	up(&dev->device_lock_sem);
+}
+
+
+void vfc_captstat_reset(struct vfc_dev *dev) 
+{
+	dev->control_reg |= VFC_CONTROL_CAPTRESET;
+	dev->regs->control=dev->control_reg;
+	dev->control_reg &= ~VFC_CONTROL_CAPTRESET;
+	dev->regs->control=dev->control_reg;
+	dev->control_reg |= VFC_CONTROL_CAPTRESET;
+	dev->regs->control=dev->control_reg;
+	return;
+}
+
+void vfc_memptr_reset(struct vfc_dev *dev) 
+{
+	dev->control_reg |= VFC_CONTROL_MEMPTR;
+	dev->regs->control = dev->control_reg; 
+	dev->control_reg &= ~VFC_CONTROL_MEMPTR;
+	dev->regs->control = dev->control_reg; 
+	dev->control_reg |= VFC_CONTROL_MEMPTR; 
+	dev->regs->control = dev->control_reg; 
+	return;
+}
+
+int vfc_csr_init(struct vfc_dev *dev)
+{
+	dev->control_reg = 0x80000000;
+	dev->regs->control = dev->control_reg;
+	udelay(200); 
+	dev->control_reg &= ~0x80000000;
+	dev->regs->control = dev->control_reg;
+	udelay(100); 
+	dev->regs->i2c_magic2 = 0x0f000000; 
+
+	vfc_memptr_reset(dev);
+
+	dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
+	dev->control_reg &= ~VFC_CONTROL_CAPTURE;
+	dev->control_reg |= 0x40000000;
+	dev->regs->control=dev->control_reg; 
+
+	vfc_captstat_reset(dev);
+
+	return 0;
+}
+
+int vfc_saa9051_init(struct vfc_dev *dev)
+{
+	int i;
+	for(i=0;i<VFC_SAA9051_NR;i++) {
+		dev->saa9051_state_array[i]=saa9051_init_array[i];
+	}
+	vfc_i2c_sendbuf(dev,VFC_SAA9051_ADDR,
+			dev->saa9051_state_array, VFC_SAA9051_NR);
+	return 0;
+}
+
+int init_vfc_hw(struct vfc_dev *dev) 
+{
+	vfc_lock_device(dev);
+	vfc_csr_init(dev);
+
+	vfc_pcf8584_init(dev);
+	vfc_init_i2c_bus(dev); /* hopefully this doesn't undo the magic
+				  sun code above*/
+	vfc_saa9051_init(dev);
+	vfc_unlock_device(dev);
+	return 0; 
+}
+
+int init_vfc_devstruct(struct vfc_dev *dev, int instance) 
+{
+	dev->instance=instance;
+	dev->device_lock_sem=MUTEX;
+	dev->control_reg=0;
+	dev->poll_wait=NULL;
+	dev->busy=0;
+	/* initialize the timer struct */
+	return 0;
+}
+
+int init_vfc_device(struct linux_sbus_device *sdev,struct vfc_dev *dev,
+		    int instance) {
+	struct linux_prom_registers reg;
+	if(!dev) {
+		printk(KERN_ERR "VFC: Bogus pointer passed\n");
+		return -ENOMEM;
+	}
+	printk("Initializing vfc%d\n",instance);
+	dev->regs=NULL;
+	memcpy(&reg,&sdev->reg_addrs[0],sizeof(struct linux_prom_registers));
+	prom_apply_sbus_ranges(sdev->my_bus, &reg, sdev->num_registers, sdev);
+	dev->regs=sparc_alloc_io(reg.phys_addr, 0,
+				 sizeof(struct vfc_regs), vfcstr, 
+				 reg.which_io, 0x0);
+	dev->which_io=reg.which_io;
+	dev->phys_regs=(struct vfc_regs *)reg.phys_addr;
+	if(!dev->regs) return -EIO;
+
+	printk("vfc%d: registers mapped at phys_addr: 0x%lx\n    virt_addr: 0x%lx\n",
+	       instance,(unsigned long)reg.phys_addr,(unsigned long)dev->regs);
+
+	if(init_vfc_devstruct(dev,instance)) return -EINVAL;
+	if(init_vfc_hw(dev)) return -EIO;
+
+	return 0;
+}
+
+
+struct vfc_dev *vfc_get_dev_ptr(int instance) 
+{
+	return vfc_dev_lst[instance];
+}
+
+static int vfc_open(struct inode *inode, struct file *file) 
+{
+	struct vfc_dev *dev;
+	dev=vfc_get_dev_ptr(MINOR(inode->i_rdev));
+	if(!dev) return -ENODEV;
+	if(dev->busy) return -EBUSY;
+	dev->busy=1;
+	MOD_INC_USE_COUNT;
+	vfc_lock_device(dev);
+	
+	vfc_csr_init(dev);
+	vfc_pcf8584_init(dev);
+	vfc_init_i2c_bus(dev);
+	vfc_saa9051_init(dev);
+	vfc_memptr_reset(dev);
+	vfc_captstat_reset(dev);
+	
+	vfc_unlock_device(dev);
+	return 0;
+}
+
+static int vfc_release(struct inode *inode,struct file *file) 
+{
+	struct vfc_dev *dev;
+	dev=vfc_get_dev_ptr(MINOR(inode->i_rdev));
+	if(!dev) return -EINVAL;
+	if(!dev->busy) return 0;
+	dev->busy=0;
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static int vfc_debug(struct vfc_dev *dev, int cmd, unsigned long arg) 
+{
+	struct vfc_debug_inout inout;
+	unsigned char *buffer;
+
+	switch(cmd) {
+	case VFC_I2C_SEND:
+		if(copy_from_user(&inout, (void *)arg, sizeof(inout))) 
+			return -EFAULT;
+
+		buffer = kmalloc(inout.len*sizeof(char), GFP_KERNEL);
+		if (!buffer)
+			return -ENOMEM;
+		if(copy_from_user(buffer, inout.buffer, inout.len*sizeof(char))) {
+			kfree_s(buffer,inout.len);
+			return -EFAULT;
+		}
+
+		vfc_lock_device(dev);
+		inout.ret=
+			vfc_i2c_sendbuf(dev,inout.addr & 0xff,
+					inout.buffer,inout.len);
+		if(copy_to_user((void *)arg,&inout,sizeof(inout))) {
+			kfree_s(buffer,inout.len);
+			return -EFAULT;
+		}
+		vfc_unlock_device(dev);
+
+		kfree_s(buffer, inout.len);
+
+		break;
+	case VFC_I2C_RECV:
+
+		if(copy_from_user(&inout, (void *)arg, sizeof(inout)))
+			return -EFAULT;
+
+		buffer = kmalloc(inout.len, GFP_KERNEL);
+		if (!buffer)
+			return -ENOMEM;
+		memset(buffer,0,inout.len*sizeof(char));
+		vfc_lock_device(dev);
+		inout.ret=
+			vfc_i2c_recvbuf(dev,inout.addr & 0xff
+					,buffer,inout.len);
+		vfc_unlock_device(dev);
+		
+		if(copy_to_user(inout.buffer, buffer, inout.len)) {
+			kfree_s(buffer,inout.len);
+			return -EFAULT;
+		}
+		if(copy_to_user((void *)arg,&inout,sizeof(inout))) {
+			kfree_s(buffer,inout.len);
+			return -EFAULT;
+		}
+		kfree_s(buffer,inout.len);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+int vfc_capture_start(struct vfc_dev *dev) 
+{
+	vfc_captstat_reset(dev);
+	dev->control_reg=dev->regs->control;
+	if((dev->control_reg & VFC_STATUS_CAPTURE)) {
+		printk(KERN_ERR "vfc%d: vfc capture status not reset\n",
+		       dev->instance);
+		return -EIO;
+	}
+
+	vfc_lock_device(dev);
+	dev->control_reg &= ~VFC_CONTROL_CAPTURE;
+	dev->regs->control=dev->control_reg;
+	dev->control_reg |= VFC_CONTROL_CAPTURE;
+	dev->regs->control=dev->control_reg;
+	dev->control_reg &= ~VFC_CONTROL_CAPTURE;
+	dev->regs->control=dev->control_reg;
+	vfc_unlock_device(dev);
+
+	return 0;
+}
+
+int vfc_capture_poll(struct vfc_dev *dev) 
+{
+	int timeout=1000;
+	while(!timeout--) {
+		if((dev->regs->control & VFC_STATUS_CAPTURE)) break;
+		vfc_i2c_delay_no_busy(dev,100);
+	}
+	if(!timeout) {
+		printk(KERN_WARNING "vfc%d: capture timed out\n", dev->instance);
+		return -ETIMEDOUT;
+	}
+	return 0;
+}
+
+
+
+static int vfc_set_control_ioctl(struct inode *inode, struct file *file, 
+			  struct vfc_dev *dev, unsigned long arg) 
+{
+	int setcmd,ret=0;
+	if(copy_from_user(&setcmd,(void *)arg,sizeof(unsigned int)))
+		return -EFAULT;
+#if 0
+	VFC_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSCTRL) arg=0x%x\n",
+			  dev->instance,setcmd));
+#endif
+	switch(setcmd) {
+	case MEMPRST:
+		vfc_lock_device(dev);
+		vfc_memptr_reset(dev);
+		vfc_unlock_device(dev);
+		ret=0;
+		break;
+	case CAPTRCMD:
+		vfc_capture_start(dev);
+		vfc_capture_poll(dev);
+		break;
+	case DIAGMODE:
+		if(suser()) {
+			vfc_lock_device(dev);
+			dev->control_reg |= VFC_CONTROL_DIAGMODE;
+			dev->regs->control = dev->control_reg;
+			vfc_unlock_device(dev);
+			ret=0;
+		} else ret=-EPERM; 
+		break;
+	case NORMMODE:
+		vfc_lock_device(dev);
+		dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
+		dev->regs->control = dev->control_reg;
+		vfc_unlock_device(dev);
+		ret=0;
+		break;
+	case CAPTRSTR:
+		vfc_capture_start(dev);
+		ret=0;
+		break;
+	case CAPTRWAIT:
+		vfc_capture_poll(dev);
+		ret=0;
+		break;
+	default:
+		ret=-EINVAL;
+	}
+	return ret;
+}
+
+
+int vfc_port_change_ioctl(struct inode *inode, struct file *file, 
+			  struct vfc_dev *dev, unsigned long arg) 
+{
+	int ret=0;
+	int cmd;
+	if(copy_from_user(&cmd, (void *)arg, sizeof(unsigned int))) {
+		VFC_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
+				  "vfc_port_change_ioctl\n",dev->instance));
+		return -EFAULT;
+	}
+	
+	VFC_DEBUG_PRINTK(("vfc%d: IOCTL(VFCPORTCHG) arg=0x%x\n",
+			  dev->instance,cmd));
+
+	switch(cmd) {
+	case 1:
+	case 2:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x72; 
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x52;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0x36;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0x18;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) = VFC_SAA9051_BP2;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_CT | VFC_SAA9051_SS3;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0x3e;
+		break;
+	case 3:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_START) = 0x3a;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HSY_STOP) = 0x17;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HC_START) = 0xfa;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HC_STOP) = 0xde;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) = VFC_SAA9051_BY | VFC_SAA9051_PF | VFC_SAA9051_BP2;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C3) = VFC_SAA9051_YC;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_SECAM_DELAY) = 0;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &= ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
+		break;
+	default:
+		ret=-EINVAL;
+		return ret;
+		break;
+	}
+
+	switch(cmd) {
+	case 1:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |= VFC_SAA9051_SS0 | VFC_SAA9051_SS1;
+		break;
+	case 2:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C2) &= ~(VFC_SAA9051_SS0 | VFC_SAA9051_SS1);
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C2) |= VFC_SAA9051_SS0; 
+		break;
+	case 3:
+		break;
+	default:
+		ret=-EINVAL;
+		return ret;
+		break;
+	}
+	VFC_SAA9051_SA(dev,VFC_SAA9051_C3) &= ~(VFC_SAA9051_SS2);
+	ret=vfc_update_saa9051(dev);
+	udelay(500);
+	VFC_SAA9051_SA(dev,VFC_SAA9051_C3) |= (VFC_SAA9051_SS2);
+	ret=vfc_update_saa9051(dev);
+	return ret;
+}
+
+int vfc_set_video_ioctl(struct inode *inode, struct file *file, 
+			struct vfc_dev *dev, unsigned long arg) 
+{
+	int ret=0;
+	int cmd;
+	if(copy_from_user(&cmd, (void *)arg, sizeof(unsigned int))) {
+		VFC_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
+				  "vfc_set_video_ioctl\n",dev->instance));
+		return -EFAULT;
+	}
+	
+	VFC_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSVID) arg=0x%x\n",
+			  dev->instance,cmd));
+	switch(cmd) {
+
+	case STD_NTSC:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~VFC_SAA9051_ALT;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_YPN | 
+			VFC_SAA9051_CCFR0 | VFC_SAA9051_CCFR1 | VFC_SAA9051_FS;
+		ret=vfc_update_saa9051(dev);
+		break;
+	case STD_PAL:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_YPN | 
+							VFC_SAA9051_CCFR1 | 
+							VFC_SAA9051_CCFR0 |
+							VFC_SAA9051_FS);
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_ALT;
+		ret=vfc_update_saa9051(dev);
+		break;
+
+	case COLOR_ON:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C1) |= VFC_SAA9051_CO;
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) &= ~(VFC_SAA9051_BY | VFC_SAA9051_PF);
+		ret=vfc_update_saa9051(dev);
+		break;
+	case MONO:
+		VFC_SAA9051_SA(dev,VFC_SAA9051_C1) &= ~(VFC_SAA9051_CO);
+		VFC_SAA9051_SA(dev,VFC_SAA9051_HORIZ_PEAK) |= VFC_SAA9051_BY | VFC_SAA9051_PF;
+		ret=vfc_update_saa9051(dev);
+		break;
+	default:
+		ret=-EINVAL;
+		break;
+	}
+	return ret;
+}
+
+int vfc_get_video_ioctl(struct inode *inode, struct file *file, 
+			struct vfc_dev *dev, unsigned long arg) 
+{
+	int ret=0;
+	unsigned int status=NO_LOCK;
+	unsigned char buf[1];
+
+	if(vfc_i2c_recvbuf(dev,VFC_SAA9051_ADDR,buf,1)) {
+		printk(KERN_ERR "vfc%d: Unable to get status\n",dev->instance);
+		return -EIO;
+	}
+
+	if(buf[0] & VFC_SAA9051_HLOCK) {
+		status = NO_LOCK;
+	} else if(buf[0] & VFC_SAA9051_FD) {
+		if(buf[0] & VFC_SAA9051_CD)
+			status=NTSC_COLOR;
+		else
+			status=NTSC_NOCOLOR;
+	} else {
+		if(buf[0] & VFC_SAA9051_CD)
+			status=PAL_COLOR;
+		else
+			status=PAL_NOCOLOR;
+	}
+	VFC_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGVID) returning status 0x%x; buf[0]=%x\n",dev->instance,
+			  status,buf[0]));
+	if(copy_to_user((void *)arg,&status,sizeof(unsigned int))) {
+		VFC_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
+				 "vfc_get_video_ioctl\n",dev->instance));
+		return -EFAULT;
+	}
+	return ret;
+}
+
+static int vfc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+	      unsigned long arg) 
+{
+	int ret=0;
+	unsigned int tmp;
+	struct vfc_dev *dev;
+
+	dev=vfc_get_dev_ptr(MINOR(inode->i_rdev));
+	if(!dev) return -ENODEV;
+	
+	switch(cmd & 0x0000ffff) {
+	case VFCGCTRL:
+#if 0
+		VFC_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGCTRL)\n",dev->instance));
+#endif
+		tmp=dev->regs->control;
+		if(copy_to_user((void *)arg,&tmp,sizeof(unsigned int)))
+			return -EFAULT;
+		ret=0;
+		break;
+	case VFCSCTRL:
+		ret=vfc_set_control_ioctl(inode, file, dev, arg);
+		break;
+	case VFCGVID:
+		ret=vfc_get_video_ioctl(inode,file,dev,arg);
+		break;
+	case VFCSVID:
+		ret=vfc_set_video_ioctl(inode,file,dev,arg);
+		break;
+	case VFCHUE:
+#if 0
+		VFC_DEBUG_PRINTK(("vfc%d: IOCTL(VFCHUE)\n",dev->instance));
+#endif
+
+		if(copy_from_user(&tmp,(void *)arg,sizeof(unsigned int))) {
+			VFC_DEBUG_PRINTK(("vfc%d: User passed bogus pointer "
+					  "to IOCTL(VFCHUE)",dev->instance));
+			ret=-EFAULT;
+		} else {
+			VFC_SAA9051_SA(dev,VFC_SAA9051_HUE)=tmp;
+			vfc_update_saa9051(dev);
+			ret=0;
+		}
+		break;
+	case VFCPORTCHG:
+		ret=vfc_port_change_ioctl(inode, file, dev, arg);
+		break;
+	case VFCRDINFO:
+		ret=-EINVAL;
+		VFC_DEBUG_PRINTK(("vfc%d: IOCTL(VFCRDINFO)\n",dev->instance));
+		break;
+	default:
+		ret=vfc_debug(vfc_get_dev_ptr(MINOR(inode->i_rdev)),
+			      cmd,arg);
+		break;
+	}
+	return ret;
+}
+
+static int vfc_mmap(struct inode *inode, struct file *file, 
+	     struct vm_area_struct *vma) 
+{
+	unsigned int map_size,ret,map_offset;
+	struct vfc_dev *dev;
+	
+	dev=vfc_get_dev_ptr(MINOR(inode->i_rdev));
+	if(!dev) return -ENODEV;
+	
+	map_size=vma->vm_end - vma->vm_start;
+	if(map_size > sizeof(struct vfc_regs)) 
+		map_size=sizeof(struct vfc_regs);
+
+
+	if(vma->vm_offset & ~PAGE_MASK) return -ENXIO;
+	vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO | VM_MAYREAD | VM_MAYWRITE | VM_MAYSHARE;
+	map_offset=(unsigned int)dev->phys_regs;
+	ret=io_remap_page_range(vma->vm_start,map_offset,map_size, 
+				vma->vm_page_prot, dev->which_io);
+	if(ret) return -EAGAIN;
+	vma->vm_inode=inode;
+	inode->i_count++;
+	return 0;
+}
+
+static long long vfc_lseek(struct inode *inode, struct file *file, 
+	      long long offset, int origin) 
+{
+	return -ESPIPE;
+}
+
+static struct file_operations vfc_fops = {
+	vfc_lseek,        /* vfc_lseek */
+	NULL,        /* vfc_write */
+	NULL,        /* vfc_read */
+	NULL,        /* vfc_readdir */
+	NULL,        /* vfc_poll */
+	vfc_ioctl,   
+	vfc_mmap, 
+	vfc_open,
+	vfc_release,
+};
+
+
+static int vfc_probe(void)
+{
+	struct linux_sbus *bus;
+	struct linux_sbus_device *sdev = NULL;
+	int ret;
+	int instance=0,cards=0;
+
+	for_all_sbusdev(sdev,bus) {
+		if (strcmp(sdev->prom_name,"vfc") == 0) {
+			cards++;
+			continue;
+		}
+	}
+
+	if (!cards)
+		return -ENODEV;
+
+	vfc_dev_lst=(struct vfc_dev **)kmalloc(sizeof(struct vfc_dev *)*
+					       (cards+1),
+					       GFP_KERNEL);
+	if(!vfc_dev_lst)
+		return -ENOMEM;
+	memset(vfc_dev_lst,0,sizeof(struct vfc_dev *)*(cards+1));
+	vfc_dev_lst[cards]=NULL;
+
+	ret=register_chrdev(VFC_MAJOR,vfcstr,&vfc_fops);
+	if(ret) {
+		printk(KERN_ERR "Unable to get major number %d\n",VFC_MAJOR);
+		kfree(vfc_dev_lst);
+		return -EIO;
+	}
+
+	instance=0;
+	for_all_sbusdev(sdev,bus) {
+		if (strcmp(sdev->prom_name,"vfc") == 0) {
+			vfc_dev_lst[instance]=(struct vfc_dev *)
+				kmalloc(sizeof(struct vfc_dev), GFP_KERNEL);
+			if(vfc_dev_lst[instance] == NULL) return -ENOMEM;
+			ret=init_vfc_device(sdev,
+					    vfc_dev_lst[instance],
+					    instance);
+			if(ret) {
+				printk(KERN_ERR "Unable to initialize"
+				       " vfc%d device\n",instance);
+			} else {
+			}
+		
+			instance++;
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+#ifdef MODULE
+int init_module(void)
+#else 
+int vfc_init(void)
+#endif
+{
+#ifdef MODULE
+	register_symtab(0);
+#endif
+	return vfc_probe();
+}
+
+#ifdef MODULE
+static void deinit_vfc_device(struct vfc_dev *dev)
+{
+	if(!dev) return;
+	sparc_free_io((void *)dev->regs,sizeof(struct vfc_regs));
+	kfree(dev);
+}
+
+void cleanup_module(void)
+{
+	struct vfc_dev **devp;
+	unregister_chrdev(VFC_MAJOR,vfcstr);
+	for(devp=vfc_dev_lst;*devp;devp++) {
+		deinit_vfc_device(*devp);
+	}
+	kfree(vfc_dev_lst);
+	return;
+}
+#endif
+
+