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yaml
---
r: 27907
b: refs/heads/master
c: f1a28c0
h: refs/heads/master
i:
  27905: e34704e
  27903: b7697a3
v: v3
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Thomas Gleixner committed May 29, 2006
1 parent f465350 commit 5beb19b
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Showing 8 changed files with 260 additions and 99 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 9a1fcdfd4bee27c418424cac47abf7c049541297
refs/heads/master: f1a28c02843efcfcc41982149880bac3ac180234
200 changes: 142 additions & 58 deletions trunk/drivers/mtd/mtdchar.c
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Original file line number Diff line number Diff line change
Expand Up @@ -49,24 +49,18 @@ static struct mtd_notifier notifier = {
};

/*
* 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:
Expand Down Expand Up @@ -97,6 +91,7 @@ static int mtd_open(struct inode *inode, struct file *file)
int minor = iminor(inode);
int devnum = minor >> 1;
struct mtd_info *mtd;
struct mtd_file_info *mfi;

DEBUG(MTD_DEBUG_LEVEL0, "MTD_open\n");

Expand All @@ -117,31 +112,38 @@ static int mtd_open(struct inode *inode, struct file *file)
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 */
Expand All @@ -153,7 +155,8 @@ static int mtd_close(struct inode *inode, struct file *file)

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;
Expand Down Expand Up @@ -186,13 +189,26 @@ static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t
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);
}
Expand Down Expand Up @@ -232,7 +248,8 @@ static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t

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;
Expand Down Expand Up @@ -270,8 +287,8 @@ static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count
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:
Expand All @@ -281,6 +298,21 @@ static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count
}
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);
}
Expand Down Expand Up @@ -310,10 +342,41 @@ static void mtdchar_erase_callback (struct erase_info *instr)
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;
Expand Down Expand Up @@ -554,16 +617,6 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
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;
Expand Down Expand Up @@ -596,25 +649,11 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
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;
}
Expand All @@ -626,15 +665,17 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
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;
case MTD_MODE_OTP_USER:
if (mtd->get_user_prot_info)
ret = mtd->get_user_prot_info(mtd, buf, 4096);
break;
default:
break;
}
if (ret >= 0) {
if (cmd == OTPGETREGIONCOUNT) {
Expand All @@ -653,7 +694,7 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
{
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;
Expand All @@ -664,6 +705,49 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
}
#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;
}
Expand Down
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