mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
usb: dwc3: debugfs: add support for changing port mode
This makes testing a lot easier when trying to switch between host and device modes. Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
parent
f96a6ec1db
commit
0b9fe32dee
@ -154,6 +154,7 @@
|
||||
#define DWC3_GCTL_CLK_PIPEHALF (2)
|
||||
#define DWC3_GCTL_CLK_MASK (3)
|
||||
|
||||
#define DWC3_GCTL_PRTCAP(n) (((n) & (3 << 12)) >> 12)
|
||||
#define DWC3_GCTL_PRTCAPDIR(n) (n << 12)
|
||||
#define DWC3_GCTL_PRTCAP_HOST 1
|
||||
#define DWC3_GCTL_PRTCAP_DEVICE 2
|
||||
|
@ -405,6 +405,80 @@ 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 reg;
|
||||
char buf[32];
|
||||
|
||||
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
|
||||
return -EFAULT;
|
||||
|
||||
spin_lock_irqsave(&dwc->lock, flags);
|
||||
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
|
||||
spin_unlock_irqrestore(&dwc->lock, flags);
|
||||
|
||||
reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
|
||||
|
||||
if (!strncmp(buf, "host", 4))
|
||||
reg |= DWC3_GCTL_PRTCAP(DWC3_GCTL_PRTCAP_HOST);
|
||||
|
||||
if (!strncmp(buf, "device", 6))
|
||||
reg |= DWC3_GCTL_PRTCAP(DWC3_GCTL_PRTCAP_DEVICE);
|
||||
|
||||
if (!strncmp(buf, "otg", 3))
|
||||
reg |= DWC3_GCTL_PRTCAP(DWC3_GCTL_PRTCAP_OTG);
|
||||
|
||||
spin_lock_irqsave(&dwc->lock, flags);
|
||||
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
|
||||
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;
|
||||
@ -425,6 +499,14 @@ 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:
|
||||
|
Loading…
Reference in New Issue
Block a user