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xhci: refactor U0 link state handling in get_port_status 

Move U0 link state handing to USB3 and USB2 specific functions

Note that
bus_state->resuming_ports:
bus_state->resume_done[]:
are only used for USB2, and don't need to cleared for USB3 ports

No functional changes

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman 2018-12-07 16:19:35 +02:00 committed by Greg Kroah-Hartman
parent 3c2ddb449a
commit a231ec41e6
1 changed files with 19 additions and 13 deletions
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32
drivers/usb/host/xhci-hub.c
View File

@ -814,10 +814,12 @@ static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li)
static void xhci_get_usb3_port_status(struct xhci_port *port, u32 *status,
u32 portsc)
{
struct xhci_bus_state *bus_state;
struct xhci_hcd *xhci;
u32 link_state;
u32 portnum;
bus_state = &port->rhub->bus_state;
xhci = hcd_to_xhci(port->rhub->hcd);
link_state = portsc & PORT_PLS_MASK;
portnum = port->hcd_portnum;
@ -839,8 +841,12 @@ static void xhci_get_usb3_port_status(struct xhci_port *port, u32 *status,
*status |= USB_PORT_STAT_C_CONFIG_ERROR << 16;
/* USB3 specific wPortStatus bits */
if (portsc & PORT_POWER)
if (portsc & PORT_POWER) {
*status |= USB_SS_PORT_STAT_POWER;
/* link state handling */
if (link_state == XDEV_U0)
bus_state->suspended_ports &= ~(1 << portnum);
}
xhci_hub_report_usb3_link_state(xhci, status, portsc);
xhci_del_comp_mod_timer(xhci, portsc, portnum);
@ -849,9 +855,13 @@ static void xhci_get_usb3_port_status(struct xhci_port *port, u32 *status,
static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status,
u32 portsc)
{
struct xhci_bus_state *bus_state;
u32 link_state;
u32 portnum;
bus_state = &port->rhub->bus_state;
link_state = portsc & PORT_PLS_MASK;
portnum = port->hcd_portnum;
/* USB2 wPortStatus bits */
if (portsc & PORT_POWER) {
@ -862,6 +872,14 @@ static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status,
*status |= USB_PORT_STAT_SUSPEND;
if (link_state == XDEV_U2)
*status |= USB_PORT_STAT_L1;
if (link_state == XDEV_U0) {
bus_state->resume_done[portnum] = 0;
clear_bit(portnum, &bus_state->resuming_ports);
if (bus_state->suspended_ports & (1 << portnum)) {
bus_state->suspended_ports &= ~(1 << portnum);
bus_state->port_c_suspend |= 1 << portnum;
}
}
}
}
@ -1011,18 +1029,6 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd,
usb_hcd_end_port_resume(&hcd->self, wIndex);
}
if ((raw_port_status & PORT_PLS_MASK) == XDEV_U0 &&
(raw_port_status & PORT_POWER)) {
if (bus_state->suspended_ports & (1 << wIndex)) {
bus_state->suspended_ports &= ~(1 << wIndex);
if (hcd->speed < HCD_USB3)
bus_state->port_c_suspend |= 1 << wIndex;
}
bus_state->resume_done[wIndex] = 0;
clear_bit(wIndex, &bus_state->resuming_ports);
}
if (bus_state->port_c_suspend & (1 << wIndex))
status |= USB_PORT_STAT_C_SUSPEND << 16;