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path: root/drivers/mtd/mtdchar.c
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Diffstat (limited to 'drivers/mtd/mtdchar.c')
-rw-r--r--drivers/mtd/mtdchar.c203
1 files changed, 89 insertions, 114 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index e7dc732ddabc..50c6a1e7f675 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -51,7 +51,7 @@ struct mtd_file_info {
enum mtd_file_modes mode;
};
-static loff_t mtd_lseek (struct file *file, loff_t offset, int orig)
+static loff_t mtdchar_lseek(struct file *file, loff_t offset, int orig)
{
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
@@ -77,7 +77,7 @@ static loff_t mtd_lseek (struct file *file, loff_t offset, int orig)
-static int mtd_open(struct inode *inode, struct file *file)
+static int mtdchar_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
int devnum = minor >> 1;
@@ -142,11 +142,11 @@ static int mtd_open(struct inode *inode, struct file *file)
out:
mutex_unlock(&mtd_mutex);
return ret;
-} /* mtd_open */
+} /* mtdchar_open */
/*====================================================================*/
-static int mtd_close(struct inode *inode, struct file *file)
+static int mtdchar_close(struct inode *inode, struct file *file)
{
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
@@ -154,8 +154,8 @@ static int mtd_close(struct inode *inode, struct file *file)
pr_debug("MTD_close\n");
/* Only sync if opened RW */
- if ((file->f_mode & FMODE_WRITE) && mtd->sync)
- mtd->sync(mtd);
+ if ((file->f_mode & FMODE_WRITE))
+ mtd_sync(mtd);
iput(mfi->ino);
@@ -164,7 +164,7 @@ static int mtd_close(struct inode *inode, struct file *file)
kfree(mfi);
return 0;
-} /* mtd_close */
+} /* mtdchar_close */
/* Back in June 2001, dwmw2 wrote:
*
@@ -184,11 +184,12 @@ static int mtd_close(struct inode *inode, struct file *file)
* alignment requirements are not met in the NAND subdriver.
*/
-static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t *ppos)
+static ssize_t mtdchar_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
{
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
- size_t retlen=0;
+ size_t retlen;
size_t total_retlen=0;
int ret=0;
int len;
@@ -212,10 +213,12 @@ static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t
switch (mfi->mode) {
case MTD_FILE_MODE_OTP_FACTORY:
- ret = mtd->read_fact_prot_reg(mtd, *ppos, len, &retlen, kbuf);
+ ret = mtd_read_fact_prot_reg(mtd, *ppos, len,
+ &retlen, kbuf);
break;
case MTD_FILE_MODE_OTP_USER:
- ret = mtd->read_user_prot_reg(mtd, *ppos, len, &retlen, kbuf);
+ ret = mtd_read_user_prot_reg(mtd, *ppos, len,
+ &retlen, kbuf);
break;
case MTD_FILE_MODE_RAW:
{
@@ -226,12 +229,12 @@ static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t
ops.oobbuf = NULL;
ops.len = len;
- ret = mtd->read_oob(mtd, *ppos, &ops);
+ ret = mtd_read_oob(mtd, *ppos, &ops);
retlen = ops.retlen;
break;
}
default:
- ret = mtd->read(mtd, *ppos, len, &retlen, kbuf);
+ ret = mtd_read(mtd, *ppos, len, &retlen, kbuf);
}
/* Nand returns -EBADMSG on ECC errors, but it returns
* the data. For our userspace tools it is important
@@ -265,9 +268,10 @@ static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t
kfree(kbuf);
return total_retlen;
-} /* mtd_read */
+} /* mtdchar_read */
-static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count,loff_t *ppos)
+static ssize_t mtdchar_write(struct file *file, const char __user *buf, size_t count,
+ loff_t *ppos)
{
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
@@ -306,11 +310,8 @@ static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count
ret = -EROFS;
break;
case MTD_FILE_MODE_OTP_USER:
- if (!mtd->write_user_prot_reg) {
- ret = -EOPNOTSUPP;
- break;
- }
- ret = mtd->write_user_prot_reg(mtd, *ppos, len, &retlen, kbuf);
+ ret = mtd_write_user_prot_reg(mtd, *ppos, len,
+ &retlen, kbuf);
break;
case MTD_FILE_MODE_RAW:
@@ -323,13 +324,13 @@ static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count
ops.ooboffs = 0;
ops.len = len;
- ret = mtd->write_oob(mtd, *ppos, &ops);
+ ret = mtd_write_oob(mtd, *ppos, &ops);
retlen = ops.retlen;
break;
}
default:
- ret = (*(mtd->write))(mtd, *ppos, len, &retlen, kbuf);
+ ret = mtd_write(mtd, *ppos, len, &retlen, kbuf);
}
if (!ret) {
*ppos += retlen;
@@ -345,7 +346,7 @@ static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count
kfree(kbuf);
return total_retlen;
-} /* mtd_write */
+} /* mtdchar_write */
/*======================================================================
@@ -361,20 +362,22 @@ static void mtdchar_erase_callback (struct erase_info *instr)
static int otp_select_filemode(struct mtd_file_info *mfi, int mode)
{
struct mtd_info *mtd = mfi->mtd;
+ size_t retlen;
int ret = 0;
+ /*
+ * Make a fake call to mtd_read_fact_prot_reg() to check if OTP
+ * operations are supported.
+ */
+ if (mtd_read_fact_prot_reg(mtd, -1, -1, &retlen, NULL) == -EOPNOTSUPP)
+ return -EOPNOTSUPP;
+
switch (mode) {
case MTD_OTP_FACTORY:
- if (!mtd->read_fact_prot_reg)
- ret = -EOPNOTSUPP;
- else
- mfi->mode = MTD_FILE_MODE_OTP_FACTORY;
+ mfi->mode = MTD_FILE_MODE_OTP_FACTORY;
break;
case MTD_OTP_USER:
- if (!mtd->read_fact_prot_reg)
- ret = -EOPNOTSUPP;
- else
- mfi->mode = MTD_FILE_MODE_OTP_USER;
+ mfi->mode = MTD_FILE_MODE_OTP_USER;
break;
default:
ret = -EINVAL;
@@ -387,7 +390,7 @@ static int otp_select_filemode(struct mtd_file_info *mfi, int mode)
# define otp_select_filemode(f,m) -EOPNOTSUPP
#endif
-static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
+static int mtdchar_writeoob(struct file *file, struct mtd_info *mtd,
uint64_t start, uint32_t length, void __user *ptr,
uint32_t __user *retp)
{
@@ -424,7 +427,7 @@ static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
return PTR_ERR(ops.oobbuf);
start &= ~((uint64_t)mtd->writesize - 1);
- ret = mtd->write_oob(mtd, start, &ops);
+ ret = mtd_write_oob(mtd, start, &ops);
if (ops.oobretlen > 0xFFFFFFFFU)
ret = -EOVERFLOW;
@@ -436,7 +439,7 @@ static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
return ret;
}
-static int mtd_do_readoob(struct file *file, struct mtd_info *mtd,
+static int mtdchar_readoob(struct file *file, struct mtd_info *mtd,
uint64_t start, uint32_t length, void __user *ptr,
uint32_t __user *retp)
{
@@ -447,13 +450,8 @@ static int mtd_do_readoob(struct file *file, struct mtd_info *mtd,
if (length > 4096)
return -EINVAL;
- if (!mtd->read_oob)
- ret = -EOPNOTSUPP;
- else
- ret = access_ok(VERIFY_WRITE, ptr,
- length) ? 0 : -EFAULT;
- if (ret)
- return ret;
+ if (!access_ok(VERIFY_WRITE, ptr, length))
+ return -EFAULT;
ops.ooblen = length;
ops.ooboffs = start & (mtd->writesize - 1);
@@ -469,7 +467,7 @@ static int mtd_do_readoob(struct file *file, struct mtd_info *mtd,
return -ENOMEM;
start &= ~((uint64_t)mtd->writesize - 1);
- ret = mtd->read_oob(mtd, start, &ops);
+ ret = mtd_read_oob(mtd, start, &ops);
if (put_user(ops.oobretlen, retp))
ret = -EFAULT;
@@ -530,7 +528,7 @@ static int shrink_ecclayout(const struct nand_ecclayout *from,
return 0;
}
-static int mtd_blkpg_ioctl(struct mtd_info *mtd,
+static int mtdchar_blkpg_ioctl(struct mtd_info *mtd,
struct blkpg_ioctl_arg __user *arg)
{
struct blkpg_ioctl_arg a;
@@ -566,7 +564,7 @@ static int mtd_blkpg_ioctl(struct mtd_info *mtd,
}
}
-static int mtd_write_ioctl(struct mtd_info *mtd,
+static int mtdchar_write_ioctl(struct mtd_info *mtd,
struct mtd_write_req __user *argp)
{
struct mtd_write_req req;
@@ -607,7 +605,7 @@ static int mtd_write_ioctl(struct mtd_info *mtd,
ops.oobbuf = NULL;
}
- ret = mtd->write_oob(mtd, (loff_t)req.start, &ops);
+ ret = mtd_write_oob(mtd, (loff_t)req.start, &ops);
kfree(ops.datbuf);
kfree(ops.oobbuf);
@@ -615,7 +613,7 @@ static int mtd_write_ioctl(struct mtd_info *mtd,
return ret;
}
-static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
+static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
{
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
@@ -729,7 +727,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
wq_head is no longer there when the
callback routine tries to wake us up.
*/
- ret = mtd->erase(mtd, erase);
+ ret = mtd_erase(mtd, erase);
if (!ret) {
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&waitq, &wait);
@@ -755,7 +753,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&buf, argp, sizeof(buf)))
ret = -EFAULT;
else
- ret = mtd_do_writeoob(file, mtd, buf.start, buf.length,
+ ret = mtdchar_writeoob(file, mtd, buf.start, buf.length,
buf.ptr, &buf_user->length);
break;
}
@@ -769,7 +767,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&buf, argp, sizeof(buf)))
ret = -EFAULT;
else
- ret = mtd_do_readoob(file, mtd, buf.start, buf.length,
+ ret = mtdchar_readoob(file, mtd, buf.start, buf.length,
buf.ptr, &buf_user->start);
break;
}
@@ -782,7 +780,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&buf, argp, sizeof(buf)))
ret = -EFAULT;
else
- ret = mtd_do_writeoob(file, mtd, buf.start, buf.length,
+ ret = mtdchar_writeoob(file, mtd, buf.start, buf.length,
(void __user *)(uintptr_t)buf.usr_ptr,
&buf_user->length);
break;
@@ -796,7 +794,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&buf, argp, sizeof(buf)))
ret = -EFAULT;
else
- ret = mtd_do_readoob(file, mtd, buf.start, buf.length,
+ ret = mtdchar_readoob(file, mtd, buf.start, buf.length,
(void __user *)(uintptr_t)buf.usr_ptr,
&buf_user->length);
break;
@@ -804,7 +802,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
case MEMWRITE:
{
- ret = mtd_write_ioctl(mtd,
+ ret = mtdchar_write_ioctl(mtd,
(struct mtd_write_req __user *)arg);
break;
}
@@ -816,10 +814,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&einfo, argp, sizeof(einfo)))
return -EFAULT;
- if (!mtd->lock)
- ret = -EOPNOTSUPP;
- else
- ret = mtd->lock(mtd, einfo.start, einfo.length);
+ ret = mtd_lock(mtd, einfo.start, einfo.length);
break;
}
@@ -830,10 +825,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&einfo, argp, sizeof(einfo)))
return -EFAULT;
- if (!mtd->unlock)
- ret = -EOPNOTSUPP;
- else
- ret = mtd->unlock(mtd, einfo.start, einfo.length);
+ ret = mtd_unlock(mtd, einfo.start, einfo.length);
break;
}
@@ -844,10 +836,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&einfo, argp, sizeof(einfo)))
return -EFAULT;
- if (!mtd->is_locked)
- ret = -EOPNOTSUPP;
- else
- ret = mtd->is_locked(mtd, einfo.start, einfo.length);
+ ret = mtd_is_locked(mtd, einfo.start, einfo.length);
break;
}
@@ -878,10 +867,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&offs, argp, sizeof(loff_t)))
return -EFAULT;
- if (!mtd->block_isbad)
- ret = -EOPNOTSUPP;
- else
- return mtd->block_isbad(mtd, offs);
+ return mtd_block_isbad(mtd, offs);
break;
}
@@ -891,10 +877,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
if (copy_from_user(&offs, argp, sizeof(loff_t)))
return -EFAULT;
- if (!mtd->block_markbad)
- ret = -EOPNOTSUPP;
- else
- return mtd->block_markbad(mtd, offs);
+ return mtd_block_markbad(mtd, offs);
break;
}
@@ -919,17 +902,15 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
struct otp_info *buf = kmalloc(4096, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- ret = -EOPNOTSUPP;
switch (mfi->mode) {
case MTD_FILE_MODE_OTP_FACTORY:
- if (mtd->get_fact_prot_info)
- ret = mtd->get_fact_prot_info(mtd, buf, 4096);
+ ret = mtd_get_fact_prot_info(mtd, buf, 4096);
break;
case MTD_FILE_MODE_OTP_USER:
- if (mtd->get_user_prot_info)
- ret = mtd->get_user_prot_info(mtd, buf, 4096);
+ ret = mtd_get_user_prot_info(mtd, buf, 4096);
break;
default:
+ ret = -EINVAL;
break;
}
if (ret >= 0) {
@@ -953,9 +934,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
return -EINVAL;
if (copy_from_user(&oinfo, argp, sizeof(oinfo)))
return -EFAULT;
- if (!mtd->lock_user_prot_reg)
- return -EOPNOTSUPP;
- ret = mtd->lock_user_prot_reg(mtd, oinfo.start, oinfo.length);
+ ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length);
break;
}
#endif
@@ -999,7 +978,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
break;
case MTD_FILE_MODE_RAW:
- if (!mtd->read_oob || !mtd->write_oob)
+ if (!mtd_has_oob(mtd))
return -EOPNOTSUPP;
mfi->mode = arg;
@@ -1014,7 +993,7 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
case BLKPG:
{
- ret = mtd_blkpg_ioctl(mtd,
+ ret = mtdchar_blkpg_ioctl(mtd,
(struct blkpg_ioctl_arg __user *)arg);
break;
}
@@ -1033,12 +1012,12 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
return ret;
} /* memory_ioctl */
-static long mtd_unlocked_ioctl(struct file *file, u_int cmd, u_long arg)
+static long mtdchar_unlocked_ioctl(struct file *file, u_int cmd, u_long arg)
{
int ret;
mutex_lock(&mtd_mutex);
- ret = mtd_ioctl(file, cmd, arg);
+ ret = mtdchar_ioctl(file, cmd, arg);
mutex_unlock(&mtd_mutex);
return ret;
@@ -1055,7 +1034,7 @@ struct mtd_oob_buf32 {
#define MEMWRITEOOB32 _IOWR('M', 3, struct mtd_oob_buf32)
#define MEMREADOOB32 _IOWR('M', 4, struct mtd_oob_buf32)
-static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
+static long mtdchar_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct mtd_file_info *mfi = file->private_data;
@@ -1074,7 +1053,7 @@ static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
if (copy_from_user(&buf, argp, sizeof(buf)))
ret = -EFAULT;
else
- ret = mtd_do_writeoob(file, mtd, buf.start,
+ ret = mtdchar_writeoob(file, mtd, buf.start,
buf.length, compat_ptr(buf.ptr),
&buf_user->length);
break;
@@ -1089,13 +1068,13 @@ static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
if (copy_from_user(&buf, argp, sizeof(buf)))
ret = -EFAULT;
else
- ret = mtd_do_readoob(file, mtd, buf.start,
+ ret = mtdchar_readoob(file, mtd, buf.start,
buf.length, compat_ptr(buf.ptr),
&buf_user->start);
break;
}
default:
- ret = mtd_ioctl(file, cmd, (unsigned long)argp);
+ ret = mtdchar_ioctl(file, cmd, (unsigned long)argp);
}
mutex_unlock(&mtd_mutex);
@@ -1111,7 +1090,7 @@ static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
* mappings)
*/
#ifndef CONFIG_MMU
-static unsigned long mtd_get_unmapped_area(struct file *file,
+static unsigned long mtdchar_get_unmapped_area(struct file *file,
unsigned long addr,
unsigned long len,
unsigned long pgoff,
@@ -1119,32 +1098,28 @@ static unsigned long mtd_get_unmapped_area(struct file *file,
{
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
+ unsigned long offset;
+ int ret;
- if (mtd->get_unmapped_area) {
- unsigned long offset;
-
- if (addr != 0)
- return (unsigned long) -EINVAL;
-
- if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT))
- return (unsigned long) -EINVAL;
+ if (addr != 0)
+ return (unsigned long) -EINVAL;
- offset = pgoff << PAGE_SHIFT;
- if (offset > mtd->size - len)
- return (unsigned long) -EINVAL;
+ if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT))
+ return (unsigned long) -EINVAL;
- return mtd->get_unmapped_area(mtd, len, offset, flags);
- }
+ offset = pgoff << PAGE_SHIFT;
+ if (offset > mtd->size - len)
+ return (unsigned long) -EINVAL;
- /* can't map directly */
- return (unsigned long) -ENOSYS;
+ ret = mtd_get_unmapped_area(mtd, len, offset, flags);
+ return ret == -EOPNOTSUPP ? -ENOSYS : ret;
}
#endif
/*
* set up a mapping for shared memory segments
*/
-static int mtd_mmap(struct file *file, struct vm_area_struct *vma)
+static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma)
{
#ifdef CONFIG_MMU
struct mtd_file_info *mfi = file->private_data;
@@ -1185,18 +1160,18 @@ static int mtd_mmap(struct file *file, struct vm_area_struct *vma)
static const struct file_operations mtd_fops = {
.owner = THIS_MODULE,
- .llseek = mtd_lseek,
- .read = mtd_read,
- .write = mtd_write,
- .unlocked_ioctl = mtd_unlocked_ioctl,
+ .llseek = mtdchar_lseek,
+ .read = mtdchar_read,
+ .write = mtdchar_write,
+ .unlocked_ioctl = mtdchar_unlocked_ioctl,
#ifdef CONFIG_COMPAT
- .compat_ioctl = mtd_compat_ioctl,
+ .compat_ioctl = mtdchar_compat_ioctl,
#endif
- .open = mtd_open,
- .release = mtd_close,
- .mmap = mtd_mmap,
+ .open = mtdchar_open,
+ .release = mtdchar_close,
+ .mmap = mtdchar_mmap,
#ifndef CONFIG_MMU
- .get_unmapped_area = mtd_get_unmapped_area,
+ .get_unmapped_area = mtdchar_get_unmapped_area,
#endif
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 17:18:05 +0000