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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2010-12-15 12:47:14 -0800
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2011-03-13 18:23:36 -0700
commit20b67cf51fa606442bb343afad0ee1a393a6afb3 (patch)
tree1d85e8b93aff185211d065a5113beaeb68cfcb26 /drivers/usb/host/xhci-hub.c
parent5308a91b9fc1a8f94b860c2589b06908a97cba7e (diff)
downloadlinux-linaro-stable-20b67cf51fa606442bb343afad0ee1a393a6afb3.tar.gz
xhci: Refactor bus suspend state into a struct.
There are several variables in the xhci_hcd structure that are related to bus suspend and resume state. There are a couple different port status arrays that are accessed by port index. Move those variables into a separate structure, xhci_bus_state. Stash that structure in xhci_hcd. When we have two roothhubs that can be suspended and resumed separately, we can have two xhci_bus_states, and index into the port arrays in each structure with the fake roothub port index (not the real hardware port index). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
-rw-r--r--drivers/usb/host/xhci-hub.c50
1 files changed, 29 insertions, 21 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 89ff025b41be..4944ba135f9a 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -291,6 +291,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u32 __iomem *port_array[15 + USB_MAXCHILDREN];
int i;
int slot_id;
+ struct xhci_bus_state *bus_state;
ports = HCS_MAX_PORTS(xhci->hcs_params1);
for (i = 0; i < ports; i++) {
@@ -300,6 +301,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
port_array[i] =
xhci->usb2_ports[i - xhci->num_usb3_ports];
}
+ bus_state = &xhci->bus_state[hcd_index(hcd)];
spin_lock_irqsave(&xhci->lock, flags);
switch (typeReq) {
@@ -336,10 +338,10 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
if ((temp & PORT_RESET) || !(temp & PORT_PE))
goto error;
if (!DEV_SUPERSPEED(temp) && time_after_eq(jiffies,
- xhci->resume_done[wIndex])) {
+ bus_state->resume_done[wIndex])) {
xhci_dbg(xhci, "Resume USB2 port %d\n",
wIndex + 1);
- xhci->resume_done[wIndex] = 0;
+ bus_state->resume_done[wIndex] = 0;
temp1 = xhci_port_state_to_neutral(temp);
temp1 &= ~PORT_PLS_MASK;
temp1 |= PORT_LINK_STROBE | XDEV_U0;
@@ -354,15 +356,15 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
goto error;
}
xhci_ring_device(xhci, slot_id);
- xhci->port_c_suspend |= 1 << wIndex;
- xhci->suspended_ports &= ~(1 << wIndex);
+ bus_state->port_c_suspend |= 1 << wIndex;
+ bus_state->suspended_ports &= ~(1 << wIndex);
}
}
if ((temp & PORT_PLS_MASK) == XDEV_U0
&& (temp & PORT_POWER)
- && (xhci->suspended_ports & (1 << wIndex))) {
- xhci->suspended_ports &= ~(1 << wIndex);
- xhci->port_c_suspend |= 1 << wIndex;
+ && (bus_state->suspended_ports & (1 << wIndex))) {
+ bus_state->suspended_ports &= ~(1 << wIndex);
+ bus_state->port_c_suspend |= 1 << wIndex;
}
if (temp & PORT_CONNECT) {
status |= USB_PORT_STAT_CONNECTION;
@@ -376,7 +378,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
status |= USB_PORT_STAT_RESET;
if (temp & PORT_POWER)
status |= USB_PORT_STAT_POWER;
- if (xhci->port_c_suspend & (1 << wIndex))
+ if (bus_state->port_c_suspend & (1 << wIndex))
status |= 1 << USB_PORT_FEAT_C_SUSPEND;
xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
put_unaligned(cpu_to_le32(status), (__le32 *) buf);
@@ -422,7 +424,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
spin_lock_irqsave(&xhci->lock, flags);
temp = xhci_readl(xhci, port_array[wIndex]);
- xhci->suspended_ports |= 1 << wIndex;
+ bus_state->suspended_ports |= 1 << wIndex;
break;
case USB_PORT_FEAT_POWER:
/*
@@ -493,7 +495,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
xhci_writel(xhci, temp,
port_array[wIndex]);
}
- xhci->port_c_suspend |= 1 << wIndex;
+ bus_state->port_c_suspend |= 1 << wIndex;
}
slot_id = xhci_find_slot_id_by_port(xhci, wIndex + 1);
@@ -504,7 +506,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
xhci_ring_device(xhci, slot_id);
break;
case USB_PORT_FEAT_C_SUSPEND:
- xhci->port_c_suspend &= ~(1 << wIndex);
+ bus_state->port_c_suspend &= ~(1 << wIndex);
case USB_PORT_FEAT_C_RESET:
case USB_PORT_FEAT_C_CONNECTION:
case USB_PORT_FEAT_C_OVER_CURRENT:
@@ -546,6 +548,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ports;
u32 __iomem *port_array[15 + USB_MAXCHILDREN];
+ struct xhci_bus_state *bus_state;
ports = HCS_MAX_PORTS(xhci->hcs_params1);
for (i = 0; i < ports; i++) {
@@ -555,6 +558,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
port_array[i] =
xhci->usb2_ports[i - xhci->num_usb3_ports];
}
+ bus_state = &xhci->bus_state[hcd_index(hcd)];
/* Initial status is no changes */
retval = (ports + 8) / 8;
@@ -568,9 +572,9 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
for (i = 0; i < ports; i++) {
temp = xhci_readl(xhci, port_array[i]);
if ((temp & mask) != 0 ||
- (xhci->port_c_suspend & 1 << i) ||
- (xhci->resume_done[i] && time_after_eq(
- jiffies, xhci->resume_done[i]))) {
+ (bus_state->port_c_suspend & 1 << i) ||
+ (bus_state->resume_done[i] && time_after_eq(
+ jiffies, bus_state->resume_done[i]))) {
buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
status = 1;
}
@@ -587,6 +591,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
int max_ports, port_index;
u32 __iomem *port_array[15 + USB_MAXCHILDREN];
int i;
+ struct xhci_bus_state *bus_state;
unsigned long flags;
xhci_dbg(xhci, "suspend root hub\n");
@@ -598,13 +603,14 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
port_array[i] =
xhci->usb2_ports[i - xhci->num_usb3_ports];
}
+ bus_state = &xhci->bus_state[hcd_index(hcd)];
spin_lock_irqsave(&xhci->lock, flags);
if (hcd->self.root_hub->do_remote_wakeup) {
port_index = max_ports;
while (port_index--) {
- if (xhci->resume_done[port_index] != 0) {
+ if (bus_state->resume_done[port_index] != 0) {
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "suspend failed because "
"port %d is resuming\n",
@@ -615,7 +621,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
}
port_index = max_ports;
- xhci->bus_suspended = 0;
+ bus_state->bus_suspended = 0;
while (port_index--) {
/* suspend the port if the port is not suspended */
u32 t1, t2;
@@ -635,7 +641,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
}
t2 &= ~PORT_PLS_MASK;
t2 |= PORT_LINK_STROBE | XDEV_U3;
- set_bit(port_index, &xhci->bus_suspended);
+ set_bit(port_index, &bus_state->bus_suspended);
}
if (hcd->self.root_hub->do_remote_wakeup) {
if (t1 & PORT_CONNECT) {
@@ -667,7 +673,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
}
}
hcd->state = HC_STATE_SUSPENDED;
- xhci->next_statechange = jiffies + msecs_to_jiffies(10);
+ bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
spin_unlock_irqrestore(&xhci->lock, flags);
return 0;
}
@@ -678,6 +684,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
int max_ports, port_index;
u32 __iomem *port_array[15 + USB_MAXCHILDREN];
int i;
+ struct xhci_bus_state *bus_state;
u32 temp;
unsigned long flags;
@@ -690,8 +697,9 @@ int xhci_bus_resume(struct usb_hcd *hcd)
port_array[i] =
xhci->usb2_ports[i - xhci->num_usb3_ports];
}
+ bus_state = &xhci->bus_state[hcd_index(hcd)];
- if (time_before(jiffies, xhci->next_statechange))
+ if (time_before(jiffies, bus_state->next_statechange))
msleep(5);
spin_lock_irqsave(&xhci->lock, flags);
@@ -717,7 +725,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
else
temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
- if (test_bit(port_index, &xhci->bus_suspended) &&
+ if (test_bit(port_index, &bus_state->bus_suspended) &&
(temp & PORT_PLS_MASK)) {
if (DEV_SUPERSPEED(temp)) {
temp = xhci_port_state_to_neutral(temp);
@@ -763,7 +771,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
(void) xhci_readl(xhci, &xhci->op_regs->command);
- xhci->next_statechange = jiffies + msecs_to_jiffies(5);
+ bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
/* re-enable irqs */
temp = xhci_readl(xhci, &xhci->op_regs->command);
temp |= CMD_EIE;