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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.c214
1 files changed, 208 insertions, 6 deletions
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 433c97c15fc5..d4a30f118724 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -46,6 +46,8 @@
#include <linux/delay.h>
#include <linux/uaccess.h>
+#include <linux/usb/ch9.h>
+
#include "core.h"
#include "gadget.h"
#include "io.h"
@@ -464,6 +466,192 @@ static const struct file_operations dwc3_mode_fops = {
.release = single_release,
};
+static int dwc3_testmode_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_DCTL);
+ reg &= DWC3_DCTL_TSTCTRL_MASK;
+ reg >>= 1;
+ spin_unlock_irqrestore(&dwc->lock, flags);
+
+ switch (reg) {
+ case 0:
+ seq_printf(s, "no test\n");
+ break;
+ case TEST_J:
+ seq_printf(s, "test_j\n");
+ break;
+ case TEST_K:
+ seq_printf(s, "test_k\n");
+ break;
+ case TEST_SE0_NAK:
+ seq_printf(s, "test_se0_nak\n");
+ break;
+ case TEST_PACKET:
+ seq_printf(s, "test_packet\n");
+ break;
+ case TEST_FORCE_EN:
+ seq_printf(s, "test_force_enable\n");
+ break;
+ default:
+ seq_printf(s, "UNKNOWN %d\n", reg);
+ }
+
+ return 0;
+}
+
+static int dwc3_testmode_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dwc3_testmode_show, inode->i_private);
+}
+
+static ssize_t dwc3_testmode_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 testmode = 0;
+ char buf[32];
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "test_j", 6))
+ testmode = TEST_J;
+ else if (!strncmp(buf, "test_k", 6))
+ testmode = TEST_K;
+ else if (!strncmp(buf, "test_se0_nak", 12))
+ testmode = TEST_SE0_NAK;
+ else if (!strncmp(buf, "test_packet", 11))
+ testmode = TEST_PACKET;
+ else if (!strncmp(buf, "test_force_enable", 17))
+ testmode = TEST_FORCE_EN;
+ else
+ testmode = 0;
+
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc3_gadget_set_test_mode(dwc, testmode);
+ spin_unlock_irqrestore(&dwc->lock, flags);
+
+ return count;
+}
+
+static const struct file_operations dwc3_testmode_fops = {
+ .open = dwc3_testmode_open,
+ .write = dwc3_testmode_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int dwc3_link_state_show(struct seq_file *s, void *unused)
+{
+ struct dwc3 *dwc = s->private;
+ unsigned long flags;
+ enum dwc3_link_state state;
+ u32 reg;
+
+ spin_lock_irqsave(&dwc->lock, flags);
+ reg = dwc3_readl(dwc->regs, DWC3_DSTS);
+ state = DWC3_DSTS_USBLNKST(reg);
+ spin_unlock_irqrestore(&dwc->lock, flags);
+
+ switch (state) {
+ case DWC3_LINK_STATE_U0:
+ seq_printf(s, "U0\n");
+ break;
+ case DWC3_LINK_STATE_U1:
+ seq_printf(s, "U1\n");
+ break;
+ case DWC3_LINK_STATE_U2:
+ seq_printf(s, "U2\n");
+ break;
+ case DWC3_LINK_STATE_U3:
+ seq_printf(s, "U3\n");
+ break;
+ case DWC3_LINK_STATE_SS_DIS:
+ seq_printf(s, "SS.Disabled\n");
+ break;
+ case DWC3_LINK_STATE_RX_DET:
+ seq_printf(s, "Rx.Detect\n");
+ break;
+ case DWC3_LINK_STATE_SS_INACT:
+ seq_printf(s, "SS.Inactive\n");
+ break;
+ case DWC3_LINK_STATE_POLL:
+ seq_printf(s, "Poll\n");
+ break;
+ case DWC3_LINK_STATE_RECOV:
+ seq_printf(s, "Recovery\n");
+ break;
+ case DWC3_LINK_STATE_HRESET:
+ seq_printf(s, "HRESET\n");
+ break;
+ case DWC3_LINK_STATE_CMPLY:
+ seq_printf(s, "Compliance\n");
+ break;
+ case DWC3_LINK_STATE_LPBK:
+ seq_printf(s, "Loopback\n");
+ break;
+ default:
+ seq_printf(s, "UNKNOWN %d\n", reg);
+ }
+
+ return 0;
+}
+
+static int dwc3_link_state_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dwc3_link_state_show, inode->i_private);
+}
+
+static ssize_t dwc3_link_state_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;
+ enum dwc3_link_state state = 0;
+ char buf[32];
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "SS.Disabled", 11))
+ state = DWC3_LINK_STATE_SS_DIS;
+ else if (!strncmp(buf, "Rx.Detect", 9))
+ state = DWC3_LINK_STATE_RX_DET;
+ else if (!strncmp(buf, "SS.Inactive", 11))
+ state = DWC3_LINK_STATE_SS_INACT;
+ else if (!strncmp(buf, "Recovery", 8))
+ state = DWC3_LINK_STATE_RECOV;
+ else if (!strncmp(buf, "Compliance", 10))
+ state = DWC3_LINK_STATE_CMPLY;
+ else if (!strncmp(buf, "Loopback", 8))
+ state = DWC3_LINK_STATE_LPBK;
+ else
+ return -EINVAL;
+
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc3_gadget_set_link_state(dwc, state);
+ spin_unlock_irqrestore(&dwc->lock, flags);
+
+ return count;
+}
+
+static const struct file_operations dwc3_link_state_fops = {
+ .open = dwc3_link_state_open,
+ .write = dwc3_link_state_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
{
struct dentry *root;
@@ -471,8 +659,8 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
int ret;
root = debugfs_create_dir(dev_name(dwc->dev), NULL);
- if (IS_ERR(root)) {
- ret = PTR_ERR(root);
+ if (!root) {
+ ret = -ENOMEM;
goto err0;
}
@@ -480,15 +668,29 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
file = debugfs_create_file("regdump", S_IRUGO, root, dwc,
&dwc3_regdump_fops);
- if (IS_ERR(file)) {
- ret = PTR_ERR(file);
+ if (!file) {
+ ret = -ENOMEM;
goto err1;
}
file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
dwc, &dwc3_mode_fops);
- if (IS_ERR(file)) {
- ret = PTR_ERR(file);
+ if (!file) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
+ dwc, &dwc3_testmode_fops);
+ if (!file) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root,
+ dwc, &dwc3_link_state_fops);
+ if (!file) {
+ ret = -ENOMEM;
goto err1;
}