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usb: chipidea: move role to debugfs

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Manual role switching function is there for debugging purposes, so has
to move to debugfs.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Shishkin
2013-03-30 12:53:52 +02:00
committed by Greg Kroah-Hartman
parent 2d6512892c
commit c8e333a3b1
2 changed files with 54 additions and 39 deletions
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54
drivers/usb/chipidea/debug.c
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@@ -199,6 +199,55 @@ static const struct file_operations ci_requests_fops = {
.release = single_release,
};
static int ci_role_show(struct seq_file *s, void *data)
{
struct ci13xxx *ci = s->private;
seq_printf(s, "%s\n", ci_role(ci)->name);
return 0;
}
static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct seq_file *s = file->private_data;
struct ci13xxx *ci = s->private;
enum ci_role role;
char buf[8];
int ret;
if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
if (ci->roles[role] &&
!strncmp(buf, ci->roles[role]->name,
strlen(ci->roles[role]->name)))
break;
if (role == CI_ROLE_END || role == ci->role)
return -EINVAL;
ci_role_stop(ci);
ret = ci_role_start(ci, role);
return ret ? ret : count;
}
static int ci_role_open(struct inode *inode, struct file *file)
{
return single_open(file, ci_role_show, inode->i_private);
}
static const struct file_operations ci_role_fops = {
.open = ci_role_open,
.write = ci_role_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/**
* dbg_create_files: initializes the attribute interface
* @ci: device
@@ -230,6 +279,11 @@ int dbg_create_files(struct ci13xxx *ci)
dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
&ci_requests_fops);
if (!dent)
goto err;
dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
&ci_role_fops);
if (dent)
return 0;
err: