diff options
| -rw-r--r-- | drivers/usb/host/xhci-caps.h | 4 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-debugfs.c | 34 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-port.h | 5 |
3 files changed, 42 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-caps.h b/drivers/usb/host/xhci-caps.h index 52153c4a43a8..2f59b6ab1e45 100644 --- a/drivers/usb/host/xhci-caps.h +++ b/drivers/usb/host/xhci-caps.h @@ -115,4 +115,6 @@ /* bit 10 - Rsvd */ /* bit 11 - HC support Double BW on a eUSB2 HS ISOC EP */ #define HCC2_EUSB2_DIC BIT(11) -/* bits 31:12 - Rsvd */ +/* bit 12 - HC support eUSB2V2 capability */ +#define HCC2_E2V2C BIT(12) +/* bits 31:13 - Rsvd */ diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c index 5322911576eb..c1eb1036ede9 100644 --- a/drivers/usb/host/xhci-debugfs.c +++ b/drivers/usb/host/xhci-debugfs.c @@ -383,6 +383,39 @@ static const struct file_operations port_fops = { .release = single_release, }; +static int xhci_portli_show(struct seq_file *s, void *unused) +{ + struct xhci_port *port = s->private; + struct xhci_hcd *xhci = hcd_to_xhci(port->rhub->hcd); + u32 portli; + + portli = readl(&port->port_reg->portli); + + /* PORTLI fields are valid if port is a USB3 or eUSB2V2 port */ + if (port->rhub == &xhci->usb3_rhub) + seq_printf(s, "0x%08x LEC=%u RLC=%u TLC=%u\n", portli, + PORT_LEC(portli), PORT_RX_LANES(portli), PORT_TX_LANES(portli)); + else if (xhci->hcc_params2 & HCC2_E2V2C) + seq_printf(s, "0x%08x RDR=%u TDR=%u\n", portli, + PORTLI_RDR(portli), PORTLI_TDR(portli)); + else + seq_printf(s, "0x%08x RsvdP\n", portli); + + return 0; +} + +static int xhci_portli_open(struct inode *inode, struct file *file) +{ + return single_open(file, xhci_portli_show, inode->i_private); +} + +static const struct file_operations portli_fops = { + .open = xhci_portli_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static void xhci_debugfs_create_files(struct xhci_hcd *xhci, struct xhci_file_map *files, size_t nentries, void *data, @@ -624,6 +657,7 @@ static void xhci_debugfs_create_ports(struct xhci_hcd *xhci, dir = debugfs_create_dir(port_name, parent); port = &xhci->hw_ports[i]; debugfs_create_file("portsc", 0644, dir, port, &port_fops); + debugfs_create_file("portli", 0444, dir, port, &portli_fops); } } diff --git a/drivers/usb/host/xhci-port.h b/drivers/usb/host/xhci-port.h index f19efb966d18..889b5fb0fcd8 100644 --- a/drivers/usb/host/xhci-port.h +++ b/drivers/usb/host/xhci-port.h @@ -144,9 +144,14 @@ #define PORT_TEST_MODE_SHIFT 28 /* USB3 Protocol PORTLI Port Link Information */ +#define PORT_LEC(p) ((p) & 0xffff) #define PORT_RX_LANES(p) (((p) >> 16) & 0xf) #define PORT_TX_LANES(p) (((p) >> 20) & 0xf) +/* eUSB2v2 protocol PORTLI Port Link information, RsvdP for normal USB2 */ +#define PORTLI_RDR(p) ((p) & 0xf) +#define PORTLI_TDR(p) (((p) >> 4) & 0xf) + /* USB2 Protocol PORTHLPMC */ #define PORT_HIRDM(p)((p) & 3) #define PORT_L1_TIMEOUT(p)(((p) & 0xff) << 2) |