*
*/
-#include <linux/config.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/init.h>
};
/*
- * We use file->private_data to store a pointer to the MTDdevice.
- * Since alighment is at least 32 bits, we have 2 bits free for OTP
- * modes as well.
+ * Data structure to hold the pointer to the mtd device as well
+ * as mode information ofr various use cases.
*/
-
-#define TO_MTD(file) (struct mtd_info *)((long)((file)->private_data) & ~3L)
-
-#define MTD_MODE_OTP_FACT 1
-#define MTD_MODE_OTP_USER 2
-#define MTD_MODE(file) ((long)((file)->private_data) & 3)
-
-#define SET_MTD_MODE(file, mode) \
- do { long __p = (long)((file)->private_data); \
- (file)->private_data = (void *)((__p & ~3L) | mode); } while (0)
+struct mtd_file_info {
+ struct mtd_info *mtd;
+ enum mtd_file_modes mode;
+};
static loff_t mtd_lseek (struct file *file, loff_t offset, int orig)
{
- struct mtd_info *mtd = TO_MTD(file);
+ struct mtd_file_info *mfi = file->private_data;
+ struct mtd_info *mtd = mfi->mtd;
switch (orig) {
- case 0:
- /* SEEK_SET */
+ case SEEK_SET:
break;
- case 1:
- /* SEEK_CUR */
+ case SEEK_CUR:
offset += file->f_pos;
break;
- case 2:
- /* SEEK_END */
+ case SEEK_END:
offset += mtd->size;
break;
default:
return -EINVAL;
}
- if (offset >= 0 && offset < mtd->size)
+ if (offset >= 0 && offset <= mtd->size)
return file->f_pos = offset;
return -EINVAL;
int minor = iminor(inode);
int devnum = minor >> 1;
struct mtd_info *mtd;
+ struct mtd_file_info *mfi;
DEBUG(MTD_DEBUG_LEVEL0, "MTD_open\n");
return -ENODEV;
}
- file->private_data = mtd;
-
/* You can't open it RW if it's not a writeable device */
if ((file->f_mode & 2) && !(mtd->flags & MTD_WRITEABLE)) {
put_mtd_device(mtd);
return -EACCES;
}
+ mfi = kzalloc(sizeof(*mfi), GFP_KERNEL);
+ if (!mfi) {
+ put_mtd_device(mtd);
+ return -ENOMEM;
+ }
+ mfi->mtd = mtd;
+ file->private_data = mfi;
+
return 0;
} /* mtd_open */
static int mtd_close(struct inode *inode, struct file *file)
{
- struct mtd_info *mtd;
+ struct mtd_file_info *mfi = file->private_data;
+ struct mtd_info *mtd = mfi->mtd;
DEBUG(MTD_DEBUG_LEVEL0, "MTD_close\n");
- mtd = TO_MTD(file);
-
if (mtd->sync)
mtd->sync(mtd);
put_mtd_device(mtd);
+ file->private_data = NULL;
+ kfree(mfi);
return 0;
} /* mtd_close */
static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t *ppos)
{
- struct mtd_info *mtd = TO_MTD(file);
+ struct mtd_file_info *mfi = file->private_data;
+ struct mtd_info *mtd = mfi->mtd;
size_t retlen=0;
size_t total_retlen=0;
int ret=0;
/* FIXME: Use kiovec in 2.5 to lock down the user's buffers
and pass them directly to the MTD functions */
+
+ if (count > MAX_KMALLOC_SIZE)
+ kbuf=kmalloc(MAX_KMALLOC_SIZE, GFP_KERNEL);
+ else
+ kbuf=kmalloc(count, GFP_KERNEL);
+
+ if (!kbuf)
+ return -ENOMEM;
+
while (count) {
+
if (count > MAX_KMALLOC_SIZE)
len = MAX_KMALLOC_SIZE;
else
len = count;
- kbuf=kmalloc(len,GFP_KERNEL);
- if (!kbuf)
- return -ENOMEM;
-
- switch (MTD_MODE(file)) {
- case MTD_MODE_OTP_FACT:
+ switch (mfi->mode) {
+ case MTD_MODE_OTP_FACTORY:
ret = mtd->read_fact_prot_reg(mtd, *ppos, len, &retlen, kbuf);
break;
case MTD_MODE_OTP_USER:
ret = mtd->read_user_prot_reg(mtd, *ppos, len, &retlen, kbuf);
break;
+ case MTD_MODE_RAW:
+ {
+ struct mtd_oob_ops ops;
+
+ ops.mode = MTD_OOB_RAW;
+ ops.datbuf = kbuf;
+ ops.oobbuf = NULL;
+ ops.len = len;
+
+ 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
* to dump areas with ecc errors !
+ * For kernel internal usage it also might return -EUCLEAN
+ * to signal the caller that a bitflip has occured and has
+ * been corrected by the ECC algorithm.
* Userspace software which accesses NAND this way
* must be aware of the fact that it deals with NAND
*/
- if (!ret || (ret == -EBADMSG)) {
+ if (!ret || (ret == -EUCLEAN) || (ret == -EBADMSG)) {
*ppos += retlen;
if (copy_to_user(buf, kbuf, retlen)) {
- kfree(kbuf);
+ kfree(kbuf);
return -EFAULT;
}
else
return ret;
}
- kfree(kbuf);
}
+ kfree(kbuf);
return total_retlen;
} /* mtd_read */
static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count,loff_t *ppos)
{
- struct mtd_info *mtd = TO_MTD(file);
+ struct mtd_file_info *mfi = file->private_data;
+ struct mtd_info *mtd = mfi->mtd;
char *kbuf;
size_t retlen;
size_t total_retlen=0;
if (!count)
return 0;
+ if (count > MAX_KMALLOC_SIZE)
+ kbuf=kmalloc(MAX_KMALLOC_SIZE, GFP_KERNEL);
+ else
+ kbuf=kmalloc(count, GFP_KERNEL);
+
+ if (!kbuf)
+ return -ENOMEM;
+
while (count) {
+
if (count > MAX_KMALLOC_SIZE)
len = MAX_KMALLOC_SIZE;
else
len = count;
- kbuf=kmalloc(len,GFP_KERNEL);
- if (!kbuf) {
- printk("kmalloc is null\n");
- return -ENOMEM;
- }
-
if (copy_from_user(kbuf, buf, len)) {
kfree(kbuf);
return -EFAULT;
}
- switch (MTD_MODE(file)) {
- case MTD_MODE_OTP_FACT:
+ switch (mfi->mode) {
+ case MTD_MODE_OTP_FACTORY:
ret = -EROFS;
break;
case MTD_MODE_OTP_USER:
}
ret = mtd->write_user_prot_reg(mtd, *ppos, len, &retlen, kbuf);
break;
+
+ case MTD_MODE_RAW:
+ {
+ struct mtd_oob_ops ops;
+
+ ops.mode = MTD_OOB_RAW;
+ ops.datbuf = kbuf;
+ ops.oobbuf = NULL;
+ ops.len = len;
+
+ ret = mtd->write_oob(mtd, *ppos, &ops);
+ retlen = ops.retlen;
+ break;
+ }
+
default:
ret = (*(mtd->write))(mtd, *ppos, len, &retlen, kbuf);
}
kfree(kbuf);
return ret;
}
-
- kfree(kbuf);
}
+ kfree(kbuf);
return total_retlen;
} /* mtd_write */
wake_up((wait_queue_head_t *)instr->priv);
}
+#if defined(CONFIG_MTD_OTP) || defined(CONFIG_MTD_ONENAND_OTP)
+static int otp_select_filemode(struct mtd_file_info *mfi, int mode)
+{
+ struct mtd_info *mtd = mfi->mtd;
+ int ret = 0;
+
+ switch (mode) {
+ case MTD_OTP_FACTORY:
+ if (!mtd->read_fact_prot_reg)
+ ret = -EOPNOTSUPP;
+ else
+ mfi->mode = MTD_MODE_OTP_FACTORY;
+ break;
+ case MTD_OTP_USER:
+ if (!mtd->read_fact_prot_reg)
+ ret = -EOPNOTSUPP;
+ else
+ mfi->mode = MTD_MODE_OTP_USER;
+ break;
+ default:
+ ret = -EINVAL;
+ case MTD_OTP_OFF:
+ break;
+ }
+ return ret;
+}
+#else
+# define otp_select_filemode(f,m) -EOPNOTSUPP
+#endif
+
static int mtd_ioctl(struct inode *inode, struct file *file,
u_int cmd, u_long arg)
{
- struct mtd_info *mtd = TO_MTD(file);
+ struct mtd_file_info *mfi = file->private_data;
+ struct mtd_info *mtd = mfi->mtd;
void __user *argp = (void __user *)arg;
int ret = 0;
u_long size;
+ struct mtd_info_user info;
DEBUG(MTD_DEBUG_LEVEL0, "MTD_ioctl\n");
}
case MEMGETINFO:
- if (copy_to_user(argp, mtd, sizeof(struct mtd_info_user)))
+ info.type = mtd->type;
+ info.flags = mtd->flags;
+ info.size = mtd->size;
+ info.erasesize = mtd->erasesize;
+ info.writesize = mtd->writesize;
+ info.oobsize = mtd->oobsize;
+ info.ecctype = mtd->ecctype;
+ info.eccsize = mtd->eccsize;
+ if (copy_to_user(argp, &info, sizeof(struct mtd_info_user)))
return -EFAULT;
break;
case MEMWRITEOOB:
{
struct mtd_oob_buf buf;
- void *databuf;
- ssize_t retlen;
+ struct mtd_oob_ops ops;
if(!(file->f_mode & 2))
return -EPERM;
if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf)))
return -EFAULT;
- if (buf.length > 0x4096)
+ if (buf.length > 4096)
return -EINVAL;
if (!mtd->write_oob)
if (ret)
return ret;
- databuf = kmalloc(buf.length, GFP_KERNEL);
- if (!databuf)
+ ops.len = buf.length;
+ ops.ooblen = buf.length;
+ ops.ooboffs = buf.start & (mtd->oobsize - 1);
+ ops.datbuf = NULL;
+ ops.mode = MTD_OOB_PLACE;
+
+ if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs))
+ return -EINVAL;
+
+ ops.oobbuf = kmalloc(buf.length, GFP_KERNEL);
+ if (!ops.oobbuf)
return -ENOMEM;
- if (copy_from_user(databuf, buf.ptr, buf.length)) {
- kfree(databuf);
+ if (copy_from_user(ops.oobbuf, buf.ptr, buf.length)) {
+ kfree(ops.oobbuf);
return -EFAULT;
}
- ret = (mtd->write_oob)(mtd, buf.start, buf.length, &retlen, databuf);
+ buf.start &= ~(mtd->oobsize - 1);
+ ret = mtd->write_oob(mtd, buf.start, &ops);
- if (copy_to_user(argp + sizeof(uint32_t), &retlen, sizeof(uint32_t)))
+ if (copy_to_user(argp + sizeof(uint32_t), &ops.retlen,
+ sizeof(uint32_t)))
ret = -EFAULT;
- kfree(databuf);
+ kfree(ops.oobbuf);
break;
}
case MEMREADOOB:
{
struct mtd_oob_buf buf;
- void *databuf;
- ssize_t retlen;
+ struct mtd_oob_ops ops;
if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf)))
return -EFAULT;
- if (buf.length > 0x4096)
+ if (buf.length > 4096)
return -EINVAL;
if (!mtd->read_oob)
else
ret = access_ok(VERIFY_WRITE, buf.ptr,
buf.length) ? 0 : -EFAULT;
-
if (ret)
return ret;
- databuf = kmalloc(buf.length, GFP_KERNEL);
- if (!databuf)
+ ops.len = buf.length;
+ ops.ooblen = buf.length;
+ ops.ooboffs = buf.start & (mtd->oobsize - 1);
+ ops.datbuf = NULL;
+ ops.mode = MTD_OOB_PLACE;
+
+ if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs))
+ return -EINVAL;
+
+ ops.oobbuf = kmalloc(buf.length, GFP_KERNEL);
+ if (!ops.oobbuf)
return -ENOMEM;
- ret = (mtd->read_oob)(mtd, buf.start, buf.length, &retlen, databuf);
+ buf.start &= ~(mtd->oobsize - 1);
+ ret = mtd->read_oob(mtd, buf.start, &ops);
- if (put_user(retlen, (uint32_t __user *)argp))
+ if (put_user(ops.retlen, (uint32_t __user *)argp))
ret = -EFAULT;
- else if (retlen && copy_to_user(buf.ptr, databuf, retlen))
+ else if (ops.retlen && copy_to_user(buf.ptr, ops.oobbuf,
+ ops.retlen))
ret = -EFAULT;
- kfree(databuf);
+ kfree(ops.oobbuf);
break;
}
break;
}
- case MEMSETOOBSEL:
- {
- if (copy_from_user(&mtd->oobinfo, argp, sizeof(struct nand_oobinfo)))
- return -EFAULT;
- break;
- }
-
+ /* Legacy interface */
case MEMGETOOBSEL:
{
- if (copy_to_user(argp, &(mtd->oobinfo), sizeof(struct nand_oobinfo)))
+ struct nand_oobinfo oi;
+
+ if (!mtd->ecclayout)
+ return -EOPNOTSUPP;
+ if (mtd->ecclayout->eccbytes > ARRAY_SIZE(oi.eccpos))
+ return -EINVAL;
+
+ oi.useecc = MTD_NANDECC_AUTOPLACE;
+ memcpy(&oi.eccpos, mtd->ecclayout->eccpos, sizeof(oi.eccpos));
+ memcpy(&oi.oobfree, mtd->ecclayout->oobfree,
+ sizeof(oi.oobfree));
+
+ if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo)))
return -EFAULT;
break;
}
break;
}
-#ifdef CONFIG_MTD_OTP
+#if defined(CONFIG_MTD_OTP) || defined(CONFIG_MTD_ONENAND_OTP)
case OTPSELECT:
{
int mode;
if (copy_from_user(&mode, argp, sizeof(int)))
return -EFAULT;
- SET_MTD_MODE(file, 0);
- switch (mode) {
- case MTD_OTP_FACTORY:
- if (!mtd->read_fact_prot_reg)
- ret = -EOPNOTSUPP;
- else
- SET_MTD_MODE(file, MTD_MODE_OTP_FACT);
- break;
- case MTD_OTP_USER:
- if (!mtd->read_fact_prot_reg)
- ret = -EOPNOTSUPP;
- else
- SET_MTD_MODE(file, MTD_MODE_OTP_USER);
- break;
- default:
- ret = -EINVAL;
- case MTD_OTP_OFF:
- break;
- }
+
+ mfi->mode = MTD_MODE_NORMAL;
+
+ ret = otp_select_filemode(mfi, mode);
+
file->f_pos = 0;
break;
}
if (!buf)
return -ENOMEM;
ret = -EOPNOTSUPP;
- switch (MTD_MODE(file)) {
- case MTD_MODE_OTP_FACT:
+ switch (mfi->mode) {
+ case MTD_MODE_OTP_FACTORY:
if (mtd->get_fact_prot_info)
ret = mtd->get_fact_prot_info(mtd, buf, 4096);
break;
if (mtd->get_user_prot_info)
ret = mtd->get_user_prot_info(mtd, buf, 4096);
break;
+ default:
+ break;
}
if (ret >= 0) {
if (cmd == OTPGETREGIONCOUNT) {
{
struct otp_info info;
- if (MTD_MODE(file) != MTD_MODE_OTP_USER)
+ if (mfi->mode != MTD_MODE_OTP_USER)
return -EINVAL;
if (copy_from_user(&info, argp, sizeof(info)))
return -EFAULT;
}
#endif
+ case ECCGETLAYOUT:
+ {
+ if (!mtd->ecclayout)
+ return -EOPNOTSUPP;
+
+ if (copy_to_user(argp, &mtd->ecclayout,
+ sizeof(struct nand_ecclayout)))
+ return -EFAULT;
+ break;
+ }
+
+ case ECCGETSTATS:
+ {
+ if (copy_to_user(argp, &mtd->ecc_stats,
+ sizeof(struct mtd_ecc_stats)))
+ return -EFAULT;
+ break;
+ }
+
+ case MTDFILEMODE:
+ {
+ mfi->mode = 0;
+
+ switch(arg) {
+ case MTD_MODE_OTP_FACTORY:
+ case MTD_MODE_OTP_USER:
+ ret = otp_select_filemode(mfi, arg);
+ break;
+
+ case MTD_MODE_RAW:
+ if (!mtd->read_oob || !mtd->write_oob)
+ return -EOPNOTSUPP;
+ mfi->mode = arg;
+
+ case MTD_MODE_NORMAL:
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ file->f_pos = 0;
+ break;
+ }
+
default:
ret = -ENOTTY;
}
git://git.onelab.eu / linux-2.6.git / blobdiff