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linux/drivers/sbus/char/vfc_dev.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h 
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

734 lines
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/*
* drivers/sbus/char/vfc_dev.c
*
* Driver for the Videopix Frame Grabber.
*
* In order to use the VFC you need to program the video controller
* chip. This chip is the Phillips SAA9051. You need to call their
* documentation ordering line to get the docs.
*
* There 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/slab.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/smp_lock.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/sbus.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#define VFC_MAJOR (60)
#if 0
#define VFC_IOCTL_DEBUG
#endif
#include "vfc.h"
#include <asm/vfc_ioctls.h>
static const struct file_operations vfc_fops;
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;
sbus_writel(dev->control_reg, &dev->regs->control);
dev->control_reg &= ~VFC_CONTROL_CAPTRESET;
sbus_writel(dev->control_reg, &dev->regs->control);
dev->control_reg |= VFC_CONTROL_CAPTRESET;
sbus_writel(dev->control_reg, &dev->regs->control);
}
void vfc_memptr_reset(struct vfc_dev *dev)
{
dev->control_reg |= VFC_CONTROL_MEMPTR;
sbus_writel(dev->control_reg, &dev->regs->control);
dev->control_reg &= ~VFC_CONTROL_MEMPTR;
sbus_writel(dev->control_reg, &dev->regs->control);
dev->control_reg |= VFC_CONTROL_MEMPTR;
sbus_writel(dev->control_reg, &dev->regs->control);
}
int vfc_csr_init(struct vfc_dev *dev)
{
dev->control_reg = 0x80000000;
sbus_writel(dev->control_reg, &dev->regs->control);
udelay(200);
dev->control_reg &= ~0x80000000;
sbus_writel(dev->control_reg, &dev->regs->control);
udelay(100);
sbus_writel(0x0f000000, &dev->regs->i2c_magic2);
vfc_memptr_reset(dev);
dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
dev->control_reg &= ~VFC_CONTROL_CAPTURE;
dev->control_reg |= 0x40000000;
sbus_writel(dev->control_reg, &dev->regs->control);
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;
init_MUTEX(&dev->device_lock_sem);
dev->control_reg=0;
dev->busy=0;
return 0;
}
int init_vfc_device(struct sbus_dev *sdev,struct vfc_dev *dev, int instance)
{
if(dev == NULL) {
printk(KERN_ERR "VFC: Bogus pointer passed\n");
return -ENOMEM;
}
printk("Initializing vfc%d\n",instance);
dev->regs = NULL;
dev->regs = (volatile struct vfc_regs __iomem *)
sbus_ioremap(&sdev->resource[0], 0,
sizeof(struct vfc_regs), vfcstr);
dev->which_io = sdev->reg_addrs[0].which_io;
dev->phys_regs = (struct vfc_regs *) sdev->reg_addrs[0].phys_addr;
if (dev->regs == NULL)
return -EIO;
printk("vfc%d: registers mapped at phys_addr: 0x%lx\n virt_addr: 0x%lx\n",
instance,(unsigned long)sdev->reg_addrs[0].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 DEFINE_SPINLOCK(vfc_dev_lock);
static int vfc_open(struct inode *inode, struct file *file)
{
struct vfc_dev *dev;
spin_lock(&vfc_dev_lock);
dev = vfc_get_dev_ptr(iminor(inode));
if (dev == NULL) {
spin_unlock(&vfc_dev_lock);
return -ENODEV;
}
if (dev->busy) {
spin_unlock(&vfc_dev_lock);
return -EBUSY;
}
dev->busy = 1;
spin_unlock(&vfc_dev_lock);
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;
spin_lock(&vfc_dev_lock);
dev = vfc_get_dev_ptr(iminor(inode));
if (!dev || !dev->busy) {
spin_unlock(&vfc_dev_lock);
return -EINVAL;
}
dev->busy = 0;
spin_unlock(&vfc_dev_lock);
return 0;
}
static int vfc_debug(struct vfc_dev *dev, int cmd, void __user *argp)
{
struct vfc_debug_inout inout;
unsigned char *buffer;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
switch(cmd) {
case VFC_I2C_SEND:
if(copy_from_user(&inout, argp, sizeof(inout)))
return -EFAULT;
buffer = kmalloc(inout.len, GFP_KERNEL);
if (buffer == NULL)
return -ENOMEM;
if(copy_from_user(buffer, inout.buffer, inout.len)) {
kfree(buffer);
return -EFAULT;
}
vfc_lock_device(dev);
inout.ret=
vfc_i2c_sendbuf(dev,inout.addr & 0xff,
buffer,inout.len);
if (copy_to_user(argp,&inout,sizeof(inout))) {
kfree(buffer);
return -EFAULT;
}
vfc_unlock_device(dev);
break;
case VFC_I2C_RECV:
if (copy_from_user(&inout, argp, sizeof(inout)))
return -EFAULT;
buffer = kmalloc(inout.len, GFP_KERNEL);
if (buffer == NULL)
return -ENOMEM;
memset(buffer,0,inout.len);
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(buffer);
return -EFAULT;
}
if (copy_to_user(argp,&inout,sizeof(inout))) {
kfree(buffer);
return -EFAULT;
}
kfree(buffer);
break;
default:
return -EINVAL;
};
return 0;
}
int vfc_capture_start(struct vfc_dev *dev)
{
vfc_captstat_reset(dev);
dev->control_reg = sbus_readl(&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;
sbus_writel(dev->control_reg, &dev->regs->control);
dev->control_reg |= VFC_CONTROL_CAPTURE;
sbus_writel(dev->control_reg, &dev->regs->control);
dev->control_reg &= ~VFC_CONTROL_CAPTURE;
sbus_writel(dev->control_reg, &dev->regs->control);
vfc_unlock_device(dev);
return 0;
}
int vfc_capture_poll(struct vfc_dev *dev)
{
int timeout = 1000;
while (!timeout--) {
if (sbus_readl(&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 __user *)arg,sizeof(unsigned int)))
return -EFAULT;
VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCSCTRL) arg=0x%x\n",
dev->instance,setcmd));
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(capable(CAP_SYS_ADMIN)) {
vfc_lock_device(dev);
dev->control_reg |= VFC_CONTROL_DIAGMODE;
sbus_writel(dev->control_reg, &dev->regs->control);
vfc_unlock_device(dev);
ret = 0;
} else {
ret = -EPERM;
}
break;
case NORMMODE:
vfc_lock_device(dev);
dev->control_reg &= ~VFC_CONTROL_DIAGMODE;
sbus_writel(dev->control_reg, &dev->regs->control);
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;
break;
};
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 __user *)arg, sizeof(unsigned int))) {
VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
"vfc_port_change_ioctl\n",
dev->instance));
return -EFAULT;
}
VFC_IOCTL_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 __user *)arg, sizeof(unsigned int))) {
VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
"vfc_set_video_ioctl\n",
dev->instance));
return ret;
}
VFC_IOCTL_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_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGVID) returning status 0x%x; "
"buf[0]=%x\n", dev->instance, status, buf[0]));
if (copy_to_user((void __user *)arg,&status,sizeof(unsigned int))) {
VFC_IOCTL_DEBUG_PRINTK(("vfc%d: User passed bogus pointer to "
"vfc_get_video_ioctl\n",
dev->instance));
return ret;
}
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;
void __user *argp = (void __user *)arg;
dev = vfc_get_dev_ptr(iminor(inode));
if(dev == NULL)
return -ENODEV;
switch(cmd & 0x0000ffff) {
case VFCGCTRL:
#if 0
VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCGCTRL)\n", dev->instance));
#endif
tmp = sbus_readl(&dev->regs->control);
if(copy_to_user(argp, &tmp, sizeof(unsigned int))) {
ret = -EFAULT;
break;
}
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:
VFC_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCHUE)\n", dev->instance));
if(copy_from_user(&tmp,argp,sizeof(unsigned int))) {
VFC_IOCTL_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_IOCTL_DEBUG_PRINTK(("vfc%d: IOCTL(VFCRDINFO)\n", dev->instance));
break;
default:
ret = vfc_debug(vfc_get_dev_ptr(iminor(inode)), cmd, argp);
break;
};
return ret;
}
static int vfc_mmap(struct file *file, struct vm_area_struct *vma)
{
unsigned int map_size, ret, map_offset;
struct vfc_dev *dev;
dev = vfc_get_dev_ptr(iminor(file->f_path.dentry->d_inode));
if(dev == NULL)
return -ENODEV;
map_size = vma->vm_end - vma->vm_start;
if(map_size > sizeof(struct vfc_regs))
map_size = sizeof(struct vfc_regs);
vma->vm_flags |=
(VM_MAYREAD | VM_MAYWRITE | VM_MAYSHARE);
map_offset = (unsigned int) (long)dev->phys_regs;
ret = io_remap_pfn_range(vma, vma->vm_start,
MK_IOSPACE_PFN(dev->which_io,
map_offset >> PAGE_SHIFT),
map_size, vma->vm_page_prot);
if(ret)
return -EAGAIN;
return 0;
}
static const struct file_operations vfc_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = vfc_ioctl,
.mmap = vfc_mmap,
.open = vfc_open,
.release = vfc_release,
};
static int vfc_probe(void)
{
struct sbus_bus *sbus;
struct sbus_dev *sdev = NULL;
int ret;
int instance = 0, cards = 0;
for_all_sbusdev(sdev, sbus) {
if (strcmp(sdev->prom_name, "vfc") == 0) {
cards++;
continue;
}
}
if (!cards)
return -ENODEV;
vfc_dev_lst = kmalloc(sizeof(struct vfc_dev *) *
(cards+1),
GFP_KERNEL);
if (vfc_dev_lst == NULL)
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, sbus) {
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
{
return vfc_probe();
}
#ifdef MODULE
static void deinit_vfc_device(struct vfc_dev *dev)
{
if(dev == NULL)
return;
sbus_iounmap(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
MODULE_LICENSE("GPL");
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