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path: root/drivers/usb/dwc3/debugfs.c
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Diffstat (limited to 'drivers/usb/dwc3/debugfs.c')
-rw-r--r--drivers/usb/dwc3/debugfs.c83
1 files changed, 80 insertions, 3 deletions
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index fcfa91517ea..433c97c15fc 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -44,12 +44,12 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/delay.h>
-
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "core.h"
#include "gadget.h"
#include "io.h"
+#include "debug.h"
#define dump_register(nm) \
{ \
@@ -395,6 +395,75 @@ static const struct file_operations dwc3_regdump_fops = {
.release = single_release,
};
+static int dwc3_mode_show(struct seq_file *s, void *unused)
+{
+ struct dwc3 *dwc = s->private;
+ unsigned long flags;
+ u32 reg;
+
+ spin_lock_irqsave(&dwc->lock, flags);
+ reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+ spin_unlock_irqrestore(&dwc->lock, flags);
+
+ switch (DWC3_GCTL_PRTCAP(reg)) {
+ case DWC3_GCTL_PRTCAP_HOST:
+ seq_printf(s, "host\n");
+ break;
+ case DWC3_GCTL_PRTCAP_DEVICE:
+ seq_printf(s, "device\n");
+ break;
+ case DWC3_GCTL_PRTCAP_OTG:
+ seq_printf(s, "OTG\n");
+ break;
+ default:
+ seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
+ }
+
+ return 0;
+}
+
+static int dwc3_mode_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dwc3_mode_show, inode->i_private);
+}
+
+static ssize_t dwc3_mode_write(struct file *file,
+ const char __user *ubuf, size_t count, loff_t *ppos)
+{
+ struct seq_file *s = file->private_data;
+ struct dwc3 *dwc = s->private;
+ unsigned long flags;
+ u32 mode = 0;
+ char buf[32];
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "host", 4))
+ mode |= DWC3_GCTL_PRTCAP_HOST;
+
+ if (!strncmp(buf, "device", 6))
+ mode |= DWC3_GCTL_PRTCAP_DEVICE;
+
+ if (!strncmp(buf, "otg", 3))
+ mode |= DWC3_GCTL_PRTCAP_OTG;
+
+ if (mode) {
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc3_set_mode(dwc, mode);
+ spin_unlock_irqrestore(&dwc->lock, flags);
+ }
+ return count;
+}
+
+static const struct file_operations dwc3_mode_fops = {
+ .open = dwc3_mode_open,
+ .write = dwc3_mode_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
{
struct dentry *root;
@@ -402,7 +471,7 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
int ret;
root = debugfs_create_dir(dev_name(dwc->dev), NULL);
- if (IS_ERR(root)){
+ if (IS_ERR(root)) {
ret = PTR_ERR(root);
goto err0;
}
@@ -415,6 +484,14 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
ret = PTR_ERR(file);
goto err1;
}
+
+ file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
+ dwc, &dwc3_mode_fops);
+ if (IS_ERR(file)) {
+ ret = PTR_ERR(file);
+ goto err1;
+ }
+
return 0;
err1: