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Merge "usb: dwc3: Add debugfs entry to toggle compliance pattern"

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qctecmdr 2021-02-19 22:41:25 -08:00 • committed by Gerrit - the friendly Code Review server
commit 98ed180626
2 changed files with 46 additions and 0 deletions
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1
drivers/usb/dwc3/core.h
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@ -321,6 +321,7 @@
/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST BIT(31)
#define DWC3_GUSB3PIPECTL_HSTPRTCMPL BIT(30)
#define DWC3_GUSB3PIPECTL_U2SSINP3OK BIT(29)
#define DWC3_GUSB3PIPECTL_DISRXDETINP3 BIT(28)
#define DWC3_GUSB3PIPECTL_UX_EXIT_PX BIT(27)

45
drivers/usb/dwc3/debugfs.c
View file

@ -689,6 +689,49 @@ static const struct file_operations dwc3_link_state_fops = {
.release = single_release,
};
static int dwc3_cp_toggle_open(struct inode *inode, struct file *file)
{
int (*show)(struct seq_file *, void *) = inode->i_private;
return single_open(file, show, inode->i_private);
}
static ssize_t dwc3_cp_toggle_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;
u32 reg;
if (atomic_read(&dwc->in_lpm)) {
pr_err("%s: USB device is powered off\n", __func__);
return 0;
}
if (dwc3_gadget_get_link_state(dwc) != DWC3_LINK_STATE_CMPLY) {
pr_err("%s: USB Device is not in compliance mode\n", __func__);
return -EINVAL;
}
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_HSTPRTCMPL;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
msleep(200);
reg &= ~DWC3_GUSB3PIPECTL_HSTPRTCMPL;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
msleep(200);
return count;
}
static const struct file_operations dwc3_cp_toggle_fops = {
.write = dwc3_cp_toggle_write,
.open = dwc3_cp_toggle_open,
.read = NULL,
.llseek = seq_lseek,
.release = single_release,
};
struct dwc3_ep_file_map {
const char name[25];
const struct file_operations *const fops;
@ -1224,6 +1267,8 @@ void dwc3_debugfs_init(struct dwc3 *dwc)
&dwc3_testmode_fops);
debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, dwc,
&dwc3_link_state_fops);
debugfs_create_file("cp_toggle", 0200, root, dwc,
&dwc3_cp_toggle_fops);
dwc3_debugfs_create_endpoint_dirs(dwc, root);
file = debugfs_create_file("int_events", 0644, root, dwc,