mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
mmc: Add Extended CSD register to debugfs
Extended CSD is a MMC card register. As increasingly interesting fields are being added to Extended CSD, it is helpful to see its value. Note that SD cards do not have an Extended CSD register, so it is MMC only. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
parent
6b0b62853b
commit
736bb6bb01
1 changed files with 67 additions and 0 deletions
|
@ -184,6 +184,68 @@ static int mmc_dbg_card_status_get(void *data, u64 *val)
|
||||||
DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
|
DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
|
||||||
NULL, "%08llx\n");
|
NULL, "%08llx\n");
|
||||||
|
|
||||||
|
#define EXT_CSD_STR_LEN 1025
|
||||||
|
|
||||||
|
static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
|
||||||
|
{
|
||||||
|
struct mmc_card *card = inode->i_private;
|
||||||
|
char *buf;
|
||||||
|
ssize_t n = 0;
|
||||||
|
u8 *ext_csd;
|
||||||
|
int err, i;
|
||||||
|
|
||||||
|
buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
|
||||||
|
if (!buf)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
ext_csd = kmalloc(512, GFP_KERNEL);
|
||||||
|
if (!ext_csd) {
|
||||||
|
err = -ENOMEM;
|
||||||
|
goto out_free;
|
||||||
|
}
|
||||||
|
|
||||||
|
mmc_claim_host(card->host);
|
||||||
|
err = mmc_send_ext_csd(card, ext_csd);
|
||||||
|
mmc_release_host(card->host);
|
||||||
|
if (err)
|
||||||
|
goto out_free;
|
||||||
|
|
||||||
|
for (i = 511; i >= 0; i--)
|
||||||
|
n += sprintf(buf + n, "%02x", ext_csd[i]);
|
||||||
|
n += sprintf(buf + n, "\n");
|
||||||
|
BUG_ON(n != EXT_CSD_STR_LEN);
|
||||||
|
|
||||||
|
filp->private_data = buf;
|
||||||
|
kfree(ext_csd);
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
out_free:
|
||||||
|
kfree(buf);
|
||||||
|
kfree(ext_csd);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
|
||||||
|
size_t cnt, loff_t *ppos)
|
||||||
|
{
|
||||||
|
char *buf = filp->private_data;
|
||||||
|
|
||||||
|
return simple_read_from_buffer(ubuf, cnt, ppos,
|
||||||
|
buf, EXT_CSD_STR_LEN);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int mmc_ext_csd_release(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
kfree(file->private_data);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct file_operations mmc_dbg_ext_csd_fops = {
|
||||||
|
.open = mmc_ext_csd_open,
|
||||||
|
.read = mmc_ext_csd_read,
|
||||||
|
.release = mmc_ext_csd_release,
|
||||||
|
};
|
||||||
|
|
||||||
void mmc_add_card_debugfs(struct mmc_card *card)
|
void mmc_add_card_debugfs(struct mmc_card *card)
|
||||||
{
|
{
|
||||||
struct mmc_host *host = card->host;
|
struct mmc_host *host = card->host;
|
||||||
|
@ -211,6 +273,11 @@ void mmc_add_card_debugfs(struct mmc_card *card)
|
||||||
&mmc_dbg_card_status_fops))
|
&mmc_dbg_card_status_fops))
|
||||||
goto err;
|
goto err;
|
||||||
|
|
||||||
|
if (mmc_card_mmc(card))
|
||||||
|
if (!debugfs_create_file("ext_csd", S_IRUSR, root, card,
|
||||||
|
&mmc_dbg_ext_csd_fops))
|
||||||
|
goto err;
|
||||||
|
|
||||||
return;
|
return;
|
||||||
|
|
||||||
err:
|
err:
|
||||||
|
|
Loading…
Reference in a new issue