};
/*
- * 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:
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;
else
len = count;
- 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);
}
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;
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);
}
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;
break;
}
- case ECCGETLAYOUT:
-
- if (!mtd->ecclayout)
- return -EOPNOTSUPP;
-
- if (copy_to_user(argp, &mtd->ecclayout,
- sizeof(struct nand_ecclayout)))
- return -EFAULT;
- break;
-
case MEMGETBADBLOCK:
{
loff_t offs;
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://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff