/*
- * $Id: mtdchar.c,v 1.54 2003/05/21 10:50:43 dwmw2 Exp $
+ * $Id: mtdchar.c,v 1.64 2004/08/09 13:59:46 dwmw2 Exp $
*
* Character-device access to raw MTD devices.
*
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
+#include <linux/mtd/compatmac.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fs.h>
#ifdef CONFIG_DEVFS_FS
#include <linux/devfs_fs_kernel.h>
-static void mtd_notify_add(struct mtd_info* mtd);
-static void mtd_notify_remove(struct mtd_info* mtd);
+
+static void mtd_notify_add(struct mtd_info* mtd)
+{
+ if (!mtd)
+ return;
+
+ devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
+ S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index);
+
+ devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
+ S_IFCHR | S_IRUGO, "mtd/%dro", mtd->index);
+}
+
+static void mtd_notify_remove(struct mtd_info* mtd)
+{
+ if (!mtd)
+ return;
+ devfs_remove("mtd/%d", mtd->index);
+ devfs_remove("mtd/%dro", mtd->index);
+}
static struct mtd_notifier notifier = {
.add = mtd_notify_add,
.remove = mtd_notify_remove,
};
+static inline void mtdchar_devfs_init(void)
+{
+ devfs_mk_dir("mtd");
+ register_mtd_user(¬ifier);
+}
+
+static inline void mtdchar_devfs_exit(void)
+{
+ unregister_mtd_user(¬ifier);
+ devfs_remove("mtd");
+}
+#else /* !DEVFS */
+#define mtdchar_devfs_init() do { } while(0)
+#define mtdchar_devfs_exit() do { } while(0)
#endif
static loff_t mtd_lseek (struct file *file, loff_t offset, int orig)
*/
#define MAX_KMALLOC_SIZE 0x20000
-static ssize_t mtd_read(struct file *file, char *buf, size_t count,loff_t *ppos)
+static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t *ppos)
{
struct mtd_info *mtd = (struct mtd_info *)file->private_data;
size_t retlen=0;
return total_retlen;
} /* mtd_read */
-static ssize_t mtd_write(struct file *file, const char *buf, size_t count,loff_t *ppos)
+static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count,loff_t *ppos)
{
struct mtd_info *mtd = (struct mtd_info *)file->private_data;
char *kbuf;
IOCTL calls for getting device parameters.
======================================================================*/
-static void mtd_erase_callback (struct erase_info *instr)
+static void mtdchar_erase_callback (struct erase_info *instr)
{
wake_up((wait_queue_head_t *)instr->priv);
}
u_int cmd, u_long arg)
{
struct mtd_info *mtd = (struct mtd_info *)file->private_data;
+ void __user *argp = (void __user *)arg;
int ret = 0;
u_long size;
size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT;
if (cmd & IOC_IN) {
- ret = verify_area(VERIFY_READ, (char *)arg, size);
+ ret = verify_area(VERIFY_READ, argp, size);
if (ret) return ret;
}
if (cmd & IOC_OUT) {
- ret = verify_area(VERIFY_WRITE, (char *)arg, size);
+ ret = verify_area(VERIFY_WRITE, argp, size);
if (ret) return ret;
}
switch (cmd) {
case MEMGETREGIONCOUNT:
- if (copy_to_user((int *) arg, &(mtd->numeraseregions), sizeof(int)))
+ if (copy_to_user(argp, &(mtd->numeraseregions), sizeof(int)))
return -EFAULT;
break;
{
struct region_info_user ur;
- if (copy_from_user( &ur,
- (struct region_info_user *)arg,
- sizeof(struct region_info_user))) {
+ if (copy_from_user(&ur, argp, sizeof(struct region_info_user)))
return -EFAULT;
- }
if (ur.regionindex >= mtd->numeraseregions)
return -EINVAL;
- if (copy_to_user((struct mtd_erase_region_info *) arg,
- &(mtd->eraseregions[ur.regionindex]),
+ if (copy_to_user(argp, &(mtd->eraseregions[ur.regionindex]),
sizeof(struct mtd_erase_region_info)))
return -EFAULT;
break;
}
case MEMGETINFO:
- if (copy_to_user((struct mtd_info *)arg, mtd,
- sizeof(struct mtd_info_user)))
+ if (copy_to_user(argp, mtd, sizeof(struct mtd_info_user)))
return -EFAULT;
break;
init_waitqueue_head(&waitq);
memset (erase,0,sizeof(struct erase_info));
- if (copy_from_user(&erase->addr, (u_long *)arg,
- 2 * sizeof(u_long))) {
+ if (copy_from_user(&erase->addr, argp,
+ sizeof(struct erase_info_user))) {
kfree(erase);
return -EFAULT;
}
erase->mtd = mtd;
- erase->callback = mtd_erase_callback;
+ erase->callback = mtdchar_erase_callback;
erase->priv = (unsigned long)&waitq;
/*
if(!(file->f_mode & 2))
return -EPERM;
- if (copy_from_user(&buf, (struct mtd_oob_buf *)arg, sizeof(struct mtd_oob_buf)))
+ if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf)))
return -EFAULT;
if (buf.length > 0x4096)
if (!mtd->write_oob)
ret = -EOPNOTSUPP;
else
- ret = verify_area(VERIFY_READ, (char *)buf.ptr, buf.length);
+ ret = verify_area(VERIFY_READ, buf.ptr, buf.length);
if (ret)
return ret;
ret = (mtd->write_oob)(mtd, buf.start, buf.length, &retlen, databuf);
- if (copy_to_user((void *)arg + sizeof(u_int32_t), &retlen, sizeof(u_int32_t)))
+ if (copy_to_user(argp + sizeof(uint32_t), &retlen, sizeof(uint32_t)))
ret = -EFAULT;
kfree(databuf);
void *databuf;
ssize_t retlen;
- if (copy_from_user(&buf, (struct mtd_oob_buf *)arg, sizeof(struct mtd_oob_buf)))
+ if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf)))
return -EFAULT;
if (buf.length > 0x4096)
if (!mtd->read_oob)
ret = -EOPNOTSUPP;
else
- ret = verify_area(VERIFY_WRITE, (char *)buf.ptr, buf.length);
+ ret = verify_area(VERIFY_WRITE, buf.ptr, buf.length);
if (ret)
return ret;
ret = (mtd->read_oob)(mtd, buf.start, buf.length, &retlen, databuf);
- if (copy_to_user((void *)arg + sizeof(u_int32_t), &retlen, sizeof(u_int32_t)))
+ if (put_user(retlen, (uint32_t __user *)argp))
ret = -EFAULT;
else if (retlen && copy_to_user(buf.ptr, databuf, retlen))
ret = -EFAULT;
case MEMLOCK:
{
- unsigned long adrs[2];
+ struct erase_info_user info;
- if (copy_from_user(adrs ,(void *)arg, 2* sizeof(unsigned long)))
+ if (copy_from_user(&info, argp, sizeof(info)))
return -EFAULT;
if (!mtd->lock)
ret = -EOPNOTSUPP;
else
- ret = mtd->lock(mtd, adrs[0], adrs[1]);
+ ret = mtd->lock(mtd, info.start, info.length);
break;
}
case MEMUNLOCK:
{
- unsigned long adrs[2];
+ struct erase_info_user info;
- if (copy_from_user(adrs, (void *)arg, 2* sizeof(unsigned long)))
+ if (copy_from_user(&info, argp, sizeof(info)))
return -EFAULT;
if (!mtd->unlock)
ret = -EOPNOTSUPP;
else
- ret = mtd->unlock(mtd, adrs[0], adrs[1]);
+ ret = mtd->unlock(mtd, info.start, info.length);
break;
}
case MEMSETOOBSEL:
{
- if (copy_from_user(&mtd->oobinfo ,(void *)arg, sizeof(struct nand_oobinfo)))
+ if (copy_from_user(&mtd->oobinfo, argp, sizeof(struct nand_oobinfo)))
return -EFAULT;
break;
}
+
+ case MEMGETOOBSEL:
+ {
+ if (copy_to_user(argp, &(mtd->oobinfo), sizeof(struct nand_oobinfo)))
+ return -EFAULT;
+ break;
+ }
+
+ case MEMGETBADBLOCK:
+ {
+ loff_t offs;
+ if (copy_from_user(&offs, argp, sizeof(loff_t)))
+ return -EFAULT;
+ if (!mtd->block_isbad)
+ ret = -EOPNOTSUPP;
+ else
+ return mtd->block_isbad(mtd, offs);
+ break;
+ }
+
+ case MEMSETBADBLOCK:
+ {
+ loff_t offs;
+
+ if (copy_from_user(&offs, argp, sizeof(loff_t)))
+ return -EFAULT;
+ if (!mtd->block_markbad)
+ ret = -EOPNOTSUPP;
+ else
+ return mtd->block_markbad(mtd, offs);
+ break;
+ }
+
default:
- DEBUG(MTD_DEBUG_LEVEL0, "Invalid ioctl %x (MEMGETINFO = %x)\n", cmd, MEMGETINFO);
ret = -ENOTTY;
}
.release = mtd_close,
};
-
-#ifdef CONFIG_DEVFS_FS
-/* Notification that a new device has been added. Create the devfs entry for
- * it. */
-
-static void mtd_notify_add(struct mtd_info* mtd)
-{
- if (!mtd)
- return;
- devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
- S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index);
- devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
- S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%dro", mtd->index);
-}
-
-static void mtd_notify_remove(struct mtd_info* mtd)
-{
- if (!mtd)
- return;
- devfs_remove("mtd/%d", mtd->index);
- devfs_remove("mtd/%dro", mtd->index);
-}
-#endif
-
static int __init init_mtdchar(void)
{
if (register_chrdev(MTD_CHAR_MAJOR, "mtd", &mtd_fops)) {
return -EAGAIN;
}
-#ifdef CONFIG_DEVFS_FS
- devfs_mk_dir("mtd");
-
- register_mtd_user(¬ifier);
-#endif
+ mtdchar_devfs_init();
return 0;
}
static void __exit cleanup_mtdchar(void)
{
-#ifdef CONFIG_DEVFS_FS
- unregister_mtd_user(¬ifier);
- devfs_remove("mtd");
-#endif
+ mtdchar_devfs_exit();
unregister_chrdev(MTD_CHAR_MAJOR, "mtd");
}
git://git.onelab.eu / linux-2.6.git / blobdiff