forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1352 lines
36 KiB
1352 lines
36 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* Copyright (C) 2001-2004 by David Brownell |
|
*/ |
|
|
|
/* this file is part of ehci-hcd.c */ |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
/* |
|
* EHCI Root Hub ... the nonsharable stuff |
|
* |
|
* Registers don't need cpu_to_le32, that happens transparently |
|
*/ |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
|
|
|
#ifdef CONFIG_PM |
|
|
|
static void unlink_empty_async_suspended(struct ehci_hcd *ehci); |
|
|
|
static int persist_enabled_on_companion(struct usb_device *udev, void *unused) |
|
{ |
|
return !udev->maxchild && udev->persist_enabled && |
|
udev->bus->root_hub->speed < USB_SPEED_HIGH; |
|
} |
|
|
|
/* After a power loss, ports that were owned by the companion must be |
|
* reset so that the companion can still own them. |
|
*/ |
|
static void ehci_handover_companion_ports(struct ehci_hcd *ehci) |
|
{ |
|
u32 __iomem *reg; |
|
u32 status; |
|
int port; |
|
__le32 buf; |
|
struct usb_hcd *hcd = ehci_to_hcd(ehci); |
|
|
|
if (!ehci->owned_ports) |
|
return; |
|
|
|
/* |
|
* USB 1.1 devices are mostly HIDs, which don't need to persist across |
|
* suspends. If we ensure that none of our companion's devices have |
|
* persist_enabled (by looking through all USB 1.1 buses in the system), |
|
* we can skip this and avoid slowing resume down. Devices without |
|
* persist will just get reenumerated shortly after resume anyway. |
|
*/ |
|
if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) |
|
return; |
|
|
|
/* Make sure the ports are powered */ |
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
if (test_bit(port, &ehci->owned_ports)) { |
|
reg = &ehci->regs->port_status[port]; |
|
status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
|
if (!(status & PORT_POWER)) |
|
ehci_port_power(ehci, port, true); |
|
} |
|
} |
|
|
|
/* Give the connections some time to appear */ |
|
msleep(20); |
|
|
|
spin_lock_irq(&ehci->lock); |
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
if (test_bit(port, &ehci->owned_ports)) { |
|
reg = &ehci->regs->port_status[port]; |
|
status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
|
|
|
/* Port already owned by companion? */ |
|
if (status & PORT_OWNER) |
|
clear_bit(port, &ehci->owned_ports); |
|
else if (test_bit(port, &ehci->companion_ports)) |
|
ehci_writel(ehci, status & ~PORT_PE, reg); |
|
else { |
|
spin_unlock_irq(&ehci->lock); |
|
ehci_hub_control(hcd, SetPortFeature, |
|
USB_PORT_FEAT_RESET, port + 1, |
|
NULL, 0); |
|
spin_lock_irq(&ehci->lock); |
|
} |
|
} |
|
} |
|
spin_unlock_irq(&ehci->lock); |
|
|
|
if (!ehci->owned_ports) |
|
return; |
|
msleep(90); /* Wait for resets to complete */ |
|
|
|
spin_lock_irq(&ehci->lock); |
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
if (test_bit(port, &ehci->owned_ports)) { |
|
spin_unlock_irq(&ehci->lock); |
|
ehci_hub_control(hcd, GetPortStatus, |
|
0, port + 1, |
|
(char *) &buf, sizeof(buf)); |
|
spin_lock_irq(&ehci->lock); |
|
|
|
/* The companion should now own the port, |
|
* but if something went wrong the port must not |
|
* remain enabled. |
|
*/ |
|
reg = &ehci->regs->port_status[port]; |
|
status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
|
if (status & PORT_OWNER) |
|
ehci_writel(ehci, status | PORT_CSC, reg); |
|
else { |
|
ehci_dbg(ehci, "failed handover port %d: %x\n", |
|
port + 1, status); |
|
ehci_writel(ehci, status & ~PORT_PE, reg); |
|
} |
|
} |
|
} |
|
|
|
ehci->owned_ports = 0; |
|
spin_unlock_irq(&ehci->lock); |
|
} |
|
|
|
static int ehci_port_change(struct ehci_hcd *ehci) |
|
{ |
|
int i = HCS_N_PORTS(ehci->hcs_params); |
|
|
|
/* First check if the controller indicates a change event */ |
|
|
|
if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) |
|
return 1; |
|
|
|
/* |
|
* Not all controllers appear to update this while going from D3 to D0, |
|
* so check the individual port status registers as well |
|
*/ |
|
|
|
while (i--) |
|
if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
|
bool suspending, bool do_wakeup) |
|
{ |
|
int port; |
|
u32 temp; |
|
|
|
/* If remote wakeup is enabled for the root hub but disabled |
|
* for the controller, we must adjust all the port wakeup flags |
|
* when the controller is suspended or resumed. In all other |
|
* cases they don't need to be changed. |
|
*/ |
|
if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
|
return; |
|
|
|
spin_lock_irq(&ehci->lock); |
|
|
|
/* clear phy low-power mode before changing wakeup flags */ |
|
if (ehci->has_tdi_phy_lpm) { |
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
|
|
|
temp = ehci_readl(ehci, hostpc_reg); |
|
ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); |
|
} |
|
spin_unlock_irq(&ehci->lock); |
|
msleep(5); |
|
spin_lock_irq(&ehci->lock); |
|
} |
|
|
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
u32 __iomem *reg = &ehci->regs->port_status[port]; |
|
u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
|
u32 t2 = t1 & ~PORT_WAKE_BITS; |
|
|
|
/* If we are suspending the controller, clear the flags. |
|
* If we are resuming the controller, set the wakeup flags. |
|
*/ |
|
if (!suspending) { |
|
if (t1 & PORT_CONNECT) |
|
t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
|
else |
|
t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
|
} |
|
ehci_writel(ehci, t2, reg); |
|
} |
|
|
|
/* enter phy low-power mode again */ |
|
if (ehci->has_tdi_phy_lpm) { |
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
|
|
|
temp = ehci_readl(ehci, hostpc_reg); |
|
ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); |
|
} |
|
} |
|
|
|
/* Does the root hub have a port wakeup pending? */ |
|
if (!suspending && ehci_port_change(ehci)) |
|
usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
|
|
|
spin_unlock_irq(&ehci->lock); |
|
} |
|
EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags); |
|
|
|
static int ehci_bus_suspend (struct usb_hcd *hcd) |
|
{ |
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
|
int port; |
|
int mask; |
|
int changed; |
|
bool fs_idle_delay; |
|
|
|
ehci_dbg(ehci, "suspend root hub\n"); |
|
|
|
if (time_before (jiffies, ehci->next_statechange)) |
|
msleep(5); |
|
|
|
/* stop the schedules */ |
|
ehci_quiesce(ehci); |
|
|
|
spin_lock_irq (&ehci->lock); |
|
if (ehci->rh_state < EHCI_RH_RUNNING) |
|
goto done; |
|
|
|
/* Once the controller is stopped, port resumes that are already |
|
* in progress won't complete. Hence if remote wakeup is enabled |
|
* for the root hub and any ports are in the middle of a resume or |
|
* remote wakeup, we must fail the suspend. |
|
*/ |
|
if (hcd->self.root_hub->do_remote_wakeup) { |
|
if (ehci->resuming_ports) { |
|
spin_unlock_irq(&ehci->lock); |
|
ehci_dbg(ehci, "suspend failed because a port is resuming\n"); |
|
return -EBUSY; |
|
} |
|
} |
|
|
|
/* Unlike other USB host controller types, EHCI doesn't have |
|
* any notion of "global" or bus-wide suspend. The driver has |
|
* to manually suspend all the active unsuspended ports, and |
|
* then manually resume them in the bus_resume() routine. |
|
*/ |
|
ehci->bus_suspended = 0; |
|
ehci->owned_ports = 0; |
|
changed = 0; |
|
fs_idle_delay = false; |
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
u32 __iomem *reg = &ehci->regs->port_status [port]; |
|
u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
|
u32 t2 = t1 & ~PORT_WAKE_BITS; |
|
|
|
/* keep track of which ports we suspend */ |
|
if (t1 & PORT_OWNER) |
|
set_bit(port, &ehci->owned_ports); |
|
else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { |
|
t2 |= PORT_SUSPEND; |
|
set_bit(port, &ehci->bus_suspended); |
|
} |
|
|
|
/* enable remote wakeup on all ports, if told to do so */ |
|
if (hcd->self.root_hub->do_remote_wakeup) { |
|
/* only enable appropriate wake bits, otherwise the |
|
* hardware can not go phy low power mode. If a race |
|
* condition happens here(connection change during bits |
|
* set), the port change detection will finally fix it. |
|
*/ |
|
if (t1 & PORT_CONNECT) |
|
t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
|
else |
|
t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
|
} |
|
|
|
if (t1 != t2) { |
|
/* |
|
* On some controllers, Wake-On-Disconnect will |
|
* generate false wakeup signals until the bus |
|
* switches over to full-speed idle. For their |
|
* sake, add a delay if we need one. |
|
*/ |
|
if ((t2 & PORT_WKDISC_E) && |
|
ehci_port_speed(ehci, t2) == |
|
USB_PORT_STAT_HIGH_SPEED) |
|
fs_idle_delay = true; |
|
ehci_writel(ehci, t2, reg); |
|
changed = 1; |
|
} |
|
} |
|
spin_unlock_irq(&ehci->lock); |
|
|
|
if (changed && ehci_has_fsl_susp_errata(ehci)) |
|
/* |
|
* Wait for at least 10 millisecondes to ensure the controller |
|
* enter the suspend status before initiating a port resume |
|
* using the Force Port Resume bit (Not-EHCI compatible). |
|
*/ |
|
usleep_range(10000, 20000); |
|
|
|
if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { |
|
/* |
|
* Wait for HCD to enter low-power mode or for the bus |
|
* to switch to full-speed idle. |
|
*/ |
|
usleep_range(5000, 5500); |
|
} |
|
|
|
if (changed && ehci->has_tdi_phy_lpm) { |
|
spin_lock_irq(&ehci->lock); |
|
port = HCS_N_PORTS(ehci->hcs_params); |
|
while (port--) { |
|
u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
|
u32 t3; |
|
|
|
t3 = ehci_readl(ehci, hostpc_reg); |
|
ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); |
|
t3 = ehci_readl(ehci, hostpc_reg); |
|
ehci_dbg(ehci, "Port %d phy low-power mode %s\n", |
|
port, (t3 & HOSTPC_PHCD) ? |
|
"succeeded" : "failed"); |
|
} |
|
spin_unlock_irq(&ehci->lock); |
|
} |
|
|
|
/* Apparently some devices need a >= 1-uframe delay here */ |
|
if (ehci->bus_suspended) |
|
udelay(150); |
|
|
|
/* turn off now-idle HC */ |
|
ehci_halt (ehci); |
|
|
|
spin_lock_irq(&ehci->lock); |
|
if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
|
ehci_handle_controller_death(ehci); |
|
if (ehci->rh_state != EHCI_RH_RUNNING) |
|
goto done; |
|
ehci->rh_state = EHCI_RH_SUSPENDED; |
|
|
|
unlink_empty_async_suspended(ehci); |
|
|
|
/* Some Synopsys controllers mistakenly leave IAA turned on */ |
|
ehci_writel(ehci, STS_IAA, &ehci->regs->status); |
|
|
|
/* Any IAA cycle that started before the suspend is now invalid */ |
|
end_iaa_cycle(ehci); |
|
ehci_handle_start_intr_unlinks(ehci); |
|
ehci_handle_intr_unlinks(ehci); |
|
end_free_itds(ehci); |
|
|
|
/* allow remote wakeup */ |
|
mask = INTR_MASK; |
|
if (!hcd->self.root_hub->do_remote_wakeup) |
|
mask &= ~STS_PCD; |
|
ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
|
ehci_readl(ehci, &ehci->regs->intr_enable); |
|
|
|
done: |
|
ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
|
ehci->enabled_hrtimer_events = 0; |
|
ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; |
|
spin_unlock_irq (&ehci->lock); |
|
|
|
hrtimer_cancel(&ehci->hrtimer); |
|
return 0; |
|
} |
|
|
|
|
|
/* caller has locked the root hub, and should reset/reinit on error */ |
|
static int ehci_bus_resume (struct usb_hcd *hcd) |
|
{ |
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
|
u32 temp; |
|
u32 power_okay; |
|
int i; |
|
unsigned long resume_needed = 0; |
|
|
|
if (time_before (jiffies, ehci->next_statechange)) |
|
msleep(5); |
|
spin_lock_irq (&ehci->lock); |
|
if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
|
goto shutdown; |
|
|
|
if (unlikely(ehci->debug)) { |
|
if (!dbgp_reset_prep(hcd)) |
|
ehci->debug = NULL; |
|
else |
|
dbgp_external_startup(hcd); |
|
} |
|
|
|
/* Ideally and we've got a real resume here, and no port's power |
|
* was lost. (For PCI, that means Vaux was maintained.) But we |
|
* could instead be restoring a swsusp snapshot -- so that BIOS was |
|
* the last user of the controller, not reset/pm hardware keeping |
|
* state we gave to it. |
|
*/ |
|
power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
|
ehci_dbg(ehci, "resume root hub%s\n", |
|
power_okay ? "" : " after power loss"); |
|
|
|
/* at least some APM implementations will try to deliver |
|
* IRQs right away, so delay them until we're ready. |
|
*/ |
|
ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
|
|
|
/* re-init operational registers */ |
|
ehci_writel(ehci, 0, &ehci->regs->segment); |
|
ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); |
|
ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); |
|
|
|
/* restore CMD_RUN, framelist size, and irq threshold */ |
|
ehci->command |= CMD_RUN; |
|
ehci_writel(ehci, ehci->command, &ehci->regs->command); |
|
ehci->rh_state = EHCI_RH_RUNNING; |
|
|
|
/* |
|
* According to Bugzilla #8190, the port status for some controllers |
|
* will be wrong without a delay. At their wrong status, the port |
|
* is enabled, but not suspended neither resumed. |
|
*/ |
|
i = HCS_N_PORTS(ehci->hcs_params); |
|
while (i--) { |
|
temp = ehci_readl(ehci, &ehci->regs->port_status[i]); |
|
if ((temp & PORT_PE) && |
|
!(temp & (PORT_SUSPEND | PORT_RESUME))) { |
|
ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); |
|
spin_unlock_irq(&ehci->lock); |
|
msleep(8); |
|
spin_lock_irq(&ehci->lock); |
|
break; |
|
} |
|
} |
|
|
|
if (ehci->shutdown) |
|
goto shutdown; |
|
|
|
/* clear phy low-power mode before resume */ |
|
if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { |
|
i = HCS_N_PORTS(ehci->hcs_params); |
|
while (i--) { |
|
if (test_bit(i, &ehci->bus_suspended)) { |
|
u32 __iomem *hostpc_reg = |
|
&ehci->regs->hostpc[i]; |
|
|
|
temp = ehci_readl(ehci, hostpc_reg); |
|
ehci_writel(ehci, temp & ~HOSTPC_PHCD, |
|
hostpc_reg); |
|
} |
|
} |
|
spin_unlock_irq(&ehci->lock); |
|
msleep(5); |
|
spin_lock_irq(&ehci->lock); |
|
if (ehci->shutdown) |
|
goto shutdown; |
|
} |
|
|
|
/* manually resume the ports we suspended during bus_suspend() */ |
|
i = HCS_N_PORTS (ehci->hcs_params); |
|
while (i--) { |
|
temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
|
temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
|
if (test_bit(i, &ehci->bus_suspended) && |
|
(temp & PORT_SUSPEND)) { |
|
temp |= PORT_RESUME; |
|
set_bit(i, &resume_needed); |
|
} |
|
ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
|
} |
|
|
|
/* |
|
* msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume |
|
* port |
|
*/ |
|
if (resume_needed) { |
|
spin_unlock_irq(&ehci->lock); |
|
msleep(USB_RESUME_TIMEOUT); |
|
spin_lock_irq(&ehci->lock); |
|
if (ehci->shutdown) |
|
goto shutdown; |
|
} |
|
|
|
i = HCS_N_PORTS (ehci->hcs_params); |
|
while (i--) { |
|
temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
|
if (test_bit(i, &resume_needed)) { |
|
temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
|
ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
|
} |
|
} |
|
|
|
ehci->next_statechange = jiffies + msecs_to_jiffies(5); |
|
spin_unlock_irq(&ehci->lock); |
|
|
|
ehci_handover_companion_ports(ehci); |
|
|
|
/* Now we can safely re-enable irqs */ |
|
spin_lock_irq(&ehci->lock); |
|
if (ehci->shutdown) |
|
goto shutdown; |
|
ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
|
(void) ehci_readl(ehci, &ehci->regs->intr_enable); |
|
spin_unlock_irq(&ehci->lock); |
|
|
|
return 0; |
|
|
|
shutdown: |
|
spin_unlock_irq(&ehci->lock); |
|
return -ESHUTDOWN; |
|
} |
|
|
|
static unsigned long ehci_get_resuming_ports(struct usb_hcd *hcd) |
|
{ |
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
|
|
|
return ehci->resuming_ports; |
|
} |
|
|
|
#else |
|
|
|
#define ehci_bus_suspend NULL |
|
#define ehci_bus_resume NULL |
|
#define ehci_get_resuming_ports NULL |
|
|
|
#endif /* CONFIG_PM */ |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
/* |
|
* Sets the owner of a port |
|
*/ |
|
static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
|
{ |
|
u32 __iomem *status_reg; |
|
u32 port_status; |
|
int try; |
|
|
|
status_reg = &ehci->regs->port_status[portnum]; |
|
|
|
/* |
|
* The controller won't set the OWNER bit if the port is |
|
* enabled, so this loop will sometimes require at least two |
|
* iterations: one to disable the port and one to set OWNER. |
|
*/ |
|
for (try = 4; try > 0; --try) { |
|
spin_lock_irq(&ehci->lock); |
|
port_status = ehci_readl(ehci, status_reg); |
|
if ((port_status & PORT_OWNER) == new_owner |
|
|| (port_status & (PORT_OWNER | PORT_CONNECT)) |
|
== 0) |
|
try = 0; |
|
else { |
|
port_status ^= PORT_OWNER; |
|
port_status &= ~(PORT_PE | PORT_RWC_BITS); |
|
ehci_writel(ehci, port_status, status_reg); |
|
} |
|
spin_unlock_irq(&ehci->lock); |
|
if (try > 1) |
|
msleep(5); |
|
} |
|
} |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
static int check_reset_complete ( |
|
struct ehci_hcd *ehci, |
|
int index, |
|
u32 __iomem *status_reg, |
|
int port_status |
|
) { |
|
if (!(port_status & PORT_CONNECT)) |
|
return port_status; |
|
|
|
/* if reset finished and it's still not enabled -- handoff */ |
|
if (!(port_status & PORT_PE)) { |
|
|
|
/* with integrated TT, there's nobody to hand it to! */ |
|
if (ehci_is_TDI(ehci)) { |
|
ehci_dbg (ehci, |
|
"Failed to enable port %d on root hub TT\n", |
|
index+1); |
|
return port_status; |
|
} |
|
|
|
ehci_dbg (ehci, "port %d full speed --> companion\n", |
|
index + 1); |
|
|
|
// what happens if HCS_N_CC(params) == 0 ? |
|
port_status |= PORT_OWNER; |
|
port_status &= ~PORT_RWC_BITS; |
|
ehci_writel(ehci, port_status, status_reg); |
|
|
|
/* ensure 440EPX ohci controller state is operational */ |
|
if (ehci->has_amcc_usb23) |
|
set_ohci_hcfs(ehci, 1); |
|
} else { |
|
ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
|
index + 1); |
|
/* ensure 440EPx ohci controller state is suspended */ |
|
if (ehci->has_amcc_usb23) |
|
set_ohci_hcfs(ehci, 0); |
|
} |
|
|
|
return port_status; |
|
} |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
|
|
/* build "status change" packet (one or two bytes) from HC registers */ |
|
|
|
static int |
|
ehci_hub_status_data (struct usb_hcd *hcd, char *buf) |
|
{ |
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
|
u32 temp, status; |
|
u32 mask; |
|
int ports, i, retval = 1; |
|
unsigned long flags; |
|
u32 ppcd = ~0; |
|
|
|
/* init status to no-changes */ |
|
buf [0] = 0; |
|
ports = HCS_N_PORTS (ehci->hcs_params); |
|
if (ports > 7) { |
|
buf [1] = 0; |
|
retval++; |
|
} |
|
|
|
/* Inform the core about resumes-in-progress by returning |
|
* a non-zero value even if there are no status changes. |
|
*/ |
|
status = ehci->resuming_ports; |
|
|
|
/* Some boards (mostly VIA?) report bogus overcurrent indications, |
|
* causing massive log spam unless we completely ignore them. It |
|
* may be relevant that VIA VT8235 controllers, where PORT_POWER is |
|
* always set, seem to clear PORT_OCC and PORT_CSC when writing to |
|
* PORT_POWER; that's surprising, but maybe within-spec. |
|
*/ |
|
if (!ignore_oc) |
|
mask = PORT_CSC | PORT_PEC | PORT_OCC; |
|
else |
|
mask = PORT_CSC | PORT_PEC; |
|
// PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND |
|
|
|
/* no hub change reports (bit 0) for now (power, ...) */ |
|
|
|
/* port N changes (bit N)? */ |
|
spin_lock_irqsave (&ehci->lock, flags); |
|
|
|
/* get per-port change detect bits */ |
|
if (ehci->has_ppcd) |
|
ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; |
|
|
|
for (i = 0; i < ports; i++) { |
|
/* leverage per-port change bits feature */ |
|
if (ppcd & (1 << i)) |
|
temp = ehci_readl(ehci, &ehci->regs->port_status[i]); |
|
else |
|
temp = 0; |
|
|
|
/* |
|
* Return status information even for ports with OWNER set. |
|
* Otherwise hub_wq wouldn't see the disconnect event when a |
|
* high-speed device is switched over to the companion |
|
* controller by the user. |
|
*/ |
|
|
|
if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
|
|| (ehci->reset_done[i] && time_after_eq( |
|
jiffies, ehci->reset_done[i]))) { |
|
if (i < 7) |
|
buf [0] |= 1 << (i + 1); |
|
else |
|
buf [1] |= 1 << (i - 7); |
|
status = STS_PCD; |
|
} |
|
} |
|
|
|
/* If a resume is in progress, make sure it can finish */ |
|
if (ehci->resuming_ports) |
|
mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); |
|
|
|
spin_unlock_irqrestore (&ehci->lock, flags); |
|
return status ? retval : 0; |
|
} |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
static void |
|
ehci_hub_descriptor ( |
|
struct ehci_hcd *ehci, |
|
struct usb_hub_descriptor *desc |
|
) { |
|
int ports = HCS_N_PORTS (ehci->hcs_params); |
|
u16 temp; |
|
|
|
desc->bDescriptorType = USB_DT_HUB; |
|
desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
|
desc->bHubContrCurrent = 0; |
|
|
|
desc->bNbrPorts = ports; |
|
temp = 1 + (ports / 8); |
|
desc->bDescLength = 7 + 2 * temp; |
|
|
|
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
|
memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
|
memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); |
|
|
|
temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ |
|
if (HCS_PPC (ehci->hcs_params)) |
|
temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ |
|
else |
|
temp |= HUB_CHAR_NO_LPSM; /* no power switching */ |
|
#if 0 |
|
// re-enable when we support USB_PORT_FEAT_INDICATOR below. |
|
if (HCS_INDICATOR (ehci->hcs_params)) |
|
temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ |
|
#endif |
|
desc->wHubCharacteristics = cpu_to_le16(temp); |
|
} |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
#ifdef CONFIG_USB_HCD_TEST_MODE |
|
|
|
#define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 |
|
|
|
static void usb_ehset_completion(struct urb *urb) |
|
{ |
|
struct completion *done = urb->context; |
|
|
|
complete(done); |
|
} |
|
static int submit_single_step_set_feature( |
|
struct usb_hcd *hcd, |
|
struct urb *urb, |
|
int is_setup |
|
); |
|
|
|
/* |
|
* Allocate and initialize a control URB. This request will be used by the |
|
* EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages |
|
* of the GetDescriptor request are sent 15 seconds after the SETUP stage. |
|
* Return NULL if failed. |
|
*/ |
|
static struct urb *request_single_step_set_feature_urb( |
|
struct usb_device *udev, |
|
void *dr, |
|
void *buf, |
|
struct completion *done |
|
) { |
|
struct urb *urb; |
|
struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
|
struct usb_host_endpoint *ep; |
|
|
|
urb = usb_alloc_urb(0, GFP_KERNEL); |
|
if (!urb) |
|
return NULL; |
|
|
|
urb->pipe = usb_rcvctrlpipe(udev, 0); |
|
ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) |
|
[usb_pipeendpoint(urb->pipe)]; |
|
if (!ep) { |
|
usb_free_urb(urb); |
|
return NULL; |
|
} |
|
|
|
urb->ep = ep; |
|
urb->dev = udev; |
|
urb->setup_packet = (void *)dr; |
|
urb->transfer_buffer = buf; |
|
urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; |
|
urb->complete = usb_ehset_completion; |
|
urb->status = -EINPROGRESS; |
|
urb->actual_length = 0; |
|
urb->transfer_flags = URB_DIR_IN; |
|
usb_get_urb(urb); |
|
atomic_inc(&urb->use_count); |
|
atomic_inc(&urb->dev->urbnum); |
|
urb->setup_dma = dma_map_single( |
|
hcd->self.sysdev, |
|
urb->setup_packet, |
|
sizeof(struct usb_ctrlrequest), |
|
DMA_TO_DEVICE); |
|
urb->transfer_dma = dma_map_single( |
|
hcd->self.sysdev, |
|
urb->transfer_buffer, |
|
urb->transfer_buffer_length, |
|
DMA_FROM_DEVICE); |
|
urb->context = done; |
|
return urb; |
|
} |
|
|
|
static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) |
|
{ |
|
int retval = -ENOMEM; |
|
struct usb_ctrlrequest *dr; |
|
struct urb *urb; |
|
struct usb_device *udev; |
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
|
struct usb_device_descriptor *buf; |
|
DECLARE_COMPLETION_ONSTACK(done); |
|
|
|
/* Obtain udev of the rhub's child port */ |
|
udev = usb_hub_find_child(hcd->self.root_hub, port); |
|
if (!udev) { |
|
ehci_err(ehci, "No device attached to the RootHub\n"); |
|
return -ENODEV; |
|
} |
|
buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); |
|
if (!buf) |
|
return -ENOMEM; |
|
|
|
dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
|
if (!dr) { |
|
kfree(buf); |
|
return -ENOMEM; |
|
} |
|
|
|
/* Fill Setup packet for GetDescriptor */ |
|
dr->bRequestType = USB_DIR_IN; |
|
dr->bRequest = USB_REQ_GET_DESCRIPTOR; |
|
dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); |
|
dr->wIndex = 0; |
|
dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); |
|
urb = request_single_step_set_feature_urb(udev, dr, buf, &done); |
|
if (!urb) |
|
goto cleanup; |
|
|
|
/* Submit just the SETUP stage */ |
|
retval = submit_single_step_set_feature(hcd, urb, 1); |
|
if (retval) |
|
goto out1; |
|
if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { |
|
usb_kill_urb(urb); |
|
retval = -ETIMEDOUT; |
|
ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); |
|
goto out1; |
|
} |
|
msleep(15 * 1000); |
|
|
|
/* Complete remaining DATA and STATUS stages using the same URB */ |
|
urb->status = -EINPROGRESS; |
|
usb_get_urb(urb); |
|
atomic_inc(&urb->use_count); |
|
atomic_inc(&urb->dev->urbnum); |
|
retval = submit_single_step_set_feature(hcd, urb, 0); |
|
if (!retval && !wait_for_completion_timeout(&done, |
|
msecs_to_jiffies(2000))) { |
|
usb_kill_urb(urb); |
|
retval = -ETIMEDOUT; |
|
ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); |
|
} |
|
out1: |
|
usb_free_urb(urb); |
|
cleanup: |
|
kfree(dr); |
|
kfree(buf); |
|
return retval; |
|
} |
|
#endif /* CONFIG_USB_HCD_TEST_MODE */ |
|
/*-------------------------------------------------------------------------*/ |
|
|
|
int ehci_hub_control( |
|
struct usb_hcd *hcd, |
|
u16 typeReq, |
|
u16 wValue, |
|
u16 wIndex, |
|
char *buf, |
|
u16 wLength |
|
) { |
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
|
int ports = HCS_N_PORTS (ehci->hcs_params); |
|
u32 __iomem *status_reg, *hostpc_reg; |
|
u32 temp, temp1, status; |
|
unsigned long flags; |
|
int retval = 0; |
|
unsigned selector; |
|
|
|
/* |
|
* Avoid underflow while calculating (wIndex & 0xff) - 1. |
|
* The compiler might deduce that wIndex can never be 0 and then |
|
* optimize away the tests for !wIndex below. |
|
*/ |
|
temp = wIndex & 0xff; |
|
temp -= (temp > 0); |
|
status_reg = &ehci->regs->port_status[temp]; |
|
hostpc_reg = &ehci->regs->hostpc[temp]; |
|
|
|
/* |
|
* FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. |
|
* HCS_INDICATOR may say we can change LEDs to off/amber/green. |
|
* (track current state ourselves) ... blink for diagnostics, |
|
* power, "this is the one", etc. EHCI spec supports this. |
|
*/ |
|
|
|
spin_lock_irqsave (&ehci->lock, flags); |
|
switch (typeReq) { |
|
case ClearHubFeature: |
|
switch (wValue) { |
|
case C_HUB_LOCAL_POWER: |
|
case C_HUB_OVER_CURRENT: |
|
/* no hub-wide feature/status flags */ |
|
break; |
|
default: |
|
goto error; |
|
} |
|
break; |
|
case ClearPortFeature: |
|
if (!wIndex || wIndex > ports) |
|
goto error; |
|
wIndex--; |
|
temp = ehci_readl(ehci, status_reg); |
|
temp &= ~PORT_RWC_BITS; |
|
|
|
/* |
|
* Even if OWNER is set, so the port is owned by the |
|
* companion controller, hub_wq needs to be able to clear |
|
* the port-change status bits (especially |
|
* USB_PORT_STAT_C_CONNECTION). |
|
*/ |
|
|
|
switch (wValue) { |
|
case USB_PORT_FEAT_ENABLE: |
|
ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
|
break; |
|
case USB_PORT_FEAT_C_ENABLE: |
|
ehci_writel(ehci, temp | PORT_PEC, status_reg); |
|
break; |
|
case USB_PORT_FEAT_SUSPEND: |
|
if (temp & PORT_RESET) |
|
goto error; |
|
if (ehci->no_selective_suspend) |
|
break; |
|
#ifdef CONFIG_USB_OTG |
|
if ((hcd->self.otg_port == (wIndex + 1)) |
|
&& hcd->self.b_hnp_enable) { |
|
otg_start_hnp(hcd->usb_phy->otg); |
|
break; |
|
} |
|
#endif |
|
if (!(temp & PORT_SUSPEND)) |
|
break; |
|
if ((temp & PORT_PE) == 0) |
|
goto error; |
|
|
|
/* clear phy low-power mode before resume */ |
|
if (ehci->has_tdi_phy_lpm) { |
|
temp1 = ehci_readl(ehci, hostpc_reg); |
|
ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, |
|
hostpc_reg); |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
msleep(5);/* wait to leave low-power mode */ |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
} |
|
/* resume signaling for 20 msec */ |
|
temp &= ~PORT_WAKE_BITS; |
|
ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
|
ehci->reset_done[wIndex] = jiffies |
|
+ msecs_to_jiffies(USB_RESUME_TIMEOUT); |
|
set_bit(wIndex, &ehci->resuming_ports); |
|
usb_hcd_start_port_resume(&hcd->self, wIndex); |
|
break; |
|
case USB_PORT_FEAT_C_SUSPEND: |
|
clear_bit(wIndex, &ehci->port_c_suspend); |
|
break; |
|
case USB_PORT_FEAT_POWER: |
|
if (HCS_PPC(ehci->hcs_params)) { |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
ehci_port_power(ehci, wIndex, false); |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
} |
|
break; |
|
case USB_PORT_FEAT_C_CONNECTION: |
|
ehci_writel(ehci, temp | PORT_CSC, status_reg); |
|
break; |
|
case USB_PORT_FEAT_C_OVER_CURRENT: |
|
ehci_writel(ehci, temp | PORT_OCC, status_reg); |
|
break; |
|
case USB_PORT_FEAT_C_RESET: |
|
/* GetPortStatus clears reset */ |
|
break; |
|
default: |
|
goto error; |
|
} |
|
ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
|
break; |
|
case GetHubDescriptor: |
|
ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) |
|
buf); |
|
break; |
|
case GetHubStatus: |
|
/* no hub-wide feature/status flags */ |
|
memset (buf, 0, 4); |
|
//cpu_to_le32s ((u32 *) buf); |
|
break; |
|
case GetPortStatus: |
|
if (!wIndex || wIndex > ports) |
|
goto error; |
|
wIndex--; |
|
status = 0; |
|
temp = ehci_readl(ehci, status_reg); |
|
|
|
// wPortChange bits |
|
if (temp & PORT_CSC) |
|
status |= USB_PORT_STAT_C_CONNECTION << 16; |
|
if (temp & PORT_PEC) |
|
status |= USB_PORT_STAT_C_ENABLE << 16; |
|
|
|
if ((temp & PORT_OCC) && !ignore_oc){ |
|
status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
|
|
|
/* |
|
* Hubs should disable port power on over-current. |
|
* However, not all EHCI implementations do this |
|
* automatically, even if they _do_ support per-port |
|
* power switching; they're allowed to just limit the |
|
* current. hub_wq will turn the power back on. |
|
*/ |
|
if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
|
&& HCS_PPC(ehci->hcs_params)) { |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
ehci_port_power(ehci, wIndex, false); |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
temp = ehci_readl(ehci, status_reg); |
|
} |
|
} |
|
|
|
/* no reset or resume pending */ |
|
if (!ehci->reset_done[wIndex]) { |
|
|
|
/* Remote Wakeup received? */ |
|
if (temp & PORT_RESUME) { |
|
/* resume signaling for 20 msec */ |
|
ehci->reset_done[wIndex] = jiffies |
|
+ msecs_to_jiffies(20); |
|
usb_hcd_start_port_resume(&hcd->self, wIndex); |
|
set_bit(wIndex, &ehci->resuming_ports); |
|
/* check the port again */ |
|
mod_timer(&ehci_to_hcd(ehci)->rh_timer, |
|
ehci->reset_done[wIndex]); |
|
} |
|
|
|
/* reset or resume not yet complete */ |
|
} else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { |
|
; /* wait until it is complete */ |
|
|
|
/* resume completed */ |
|
} else if (test_bit(wIndex, &ehci->resuming_ports)) { |
|
clear_bit(wIndex, &ehci->suspended_ports); |
|
set_bit(wIndex, &ehci->port_c_suspend); |
|
ehci->reset_done[wIndex] = 0; |
|
usb_hcd_end_port_resume(&hcd->self, wIndex); |
|
|
|
/* stop resume signaling */ |
|
temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
|
ehci_writel(ehci, temp, status_reg); |
|
clear_bit(wIndex, &ehci->resuming_ports); |
|
retval = ehci_handshake(ehci, status_reg, |
|
PORT_RESUME, 0, 2000 /* 2msec */); |
|
if (retval != 0) { |
|
ehci_err(ehci, "port %d resume error %d\n", |
|
wIndex + 1, retval); |
|
goto error; |
|
} |
|
temp = ehci_readl(ehci, status_reg); |
|
|
|
/* whoever resets must GetPortStatus to complete it!! */ |
|
} else { |
|
status |= USB_PORT_STAT_C_RESET << 16; |
|
ehci->reset_done [wIndex] = 0; |
|
|
|
/* force reset to complete */ |
|
ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
|
status_reg); |
|
/* REVISIT: some hardware needs 550+ usec to clear |
|
* this bit; seems too long to spin routinely... |
|
*/ |
|
retval = ehci_handshake(ehci, status_reg, |
|
PORT_RESET, 0, 1000); |
|
if (retval != 0) { |
|
ehci_err (ehci, "port %d reset error %d\n", |
|
wIndex + 1, retval); |
|
goto error; |
|
} |
|
|
|
/* see what we found out */ |
|
temp = check_reset_complete (ehci, wIndex, status_reg, |
|
ehci_readl(ehci, status_reg)); |
|
} |
|
|
|
/* transfer dedicated ports to the companion hc */ |
|
if ((temp & PORT_CONNECT) && |
|
test_bit(wIndex, &ehci->companion_ports)) { |
|
temp &= ~PORT_RWC_BITS; |
|
temp |= PORT_OWNER; |
|
ehci_writel(ehci, temp, status_reg); |
|
ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); |
|
temp = ehci_readl(ehci, status_reg); |
|
} |
|
|
|
/* |
|
* Even if OWNER is set, there's no harm letting hub_wq |
|
* see the wPortStatus values (they should all be 0 except |
|
* for PORT_POWER anyway). |
|
*/ |
|
|
|
if (temp & PORT_CONNECT) { |
|
status |= USB_PORT_STAT_CONNECTION; |
|
// status may be from integrated TT |
|
if (ehci->has_hostpc) { |
|
temp1 = ehci_readl(ehci, hostpc_reg); |
|
status |= ehci_port_speed(ehci, temp1); |
|
} else |
|
status |= ehci_port_speed(ehci, temp); |
|
} |
|
if (temp & PORT_PE) |
|
status |= USB_PORT_STAT_ENABLE; |
|
|
|
/* maybe the port was unsuspended without our knowledge */ |
|
if (temp & (PORT_SUSPEND|PORT_RESUME)) { |
|
status |= USB_PORT_STAT_SUSPEND; |
|
} else if (test_bit(wIndex, &ehci->suspended_ports)) { |
|
clear_bit(wIndex, &ehci->suspended_ports); |
|
clear_bit(wIndex, &ehci->resuming_ports); |
|
ehci->reset_done[wIndex] = 0; |
|
if (temp & PORT_PE) |
|
set_bit(wIndex, &ehci->port_c_suspend); |
|
usb_hcd_end_port_resume(&hcd->self, wIndex); |
|
} |
|
|
|
if (temp & PORT_OC) |
|
status |= USB_PORT_STAT_OVERCURRENT; |
|
if (temp & PORT_RESET) |
|
status |= USB_PORT_STAT_RESET; |
|
if (temp & PORT_POWER) |
|
status |= USB_PORT_STAT_POWER; |
|
if (test_bit(wIndex, &ehci->port_c_suspend)) |
|
status |= USB_PORT_STAT_C_SUSPEND << 16; |
|
|
|
if (status & ~0xffff) /* only if wPortChange is interesting */ |
|
dbg_port(ehci, "GetStatus", wIndex + 1, temp); |
|
put_unaligned_le32(status, buf); |
|
break; |
|
case SetHubFeature: |
|
switch (wValue) { |
|
case C_HUB_LOCAL_POWER: |
|
case C_HUB_OVER_CURRENT: |
|
/* no hub-wide feature/status flags */ |
|
break; |
|
default: |
|
goto error; |
|
} |
|
break; |
|
case SetPortFeature: |
|
selector = wIndex >> 8; |
|
wIndex &= 0xff; |
|
if (unlikely(ehci->debug)) { |
|
/* If the debug port is active any port |
|
* feature requests should get denied */ |
|
if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && |
|
(readl(&ehci->debug->control) & DBGP_ENABLED)) { |
|
retval = -ENODEV; |
|
goto error_exit; |
|
} |
|
} |
|
if (!wIndex || wIndex > ports) |
|
goto error; |
|
wIndex--; |
|
temp = ehci_readl(ehci, status_reg); |
|
if (temp & PORT_OWNER) |
|
break; |
|
|
|
temp &= ~PORT_RWC_BITS; |
|
switch (wValue) { |
|
case USB_PORT_FEAT_SUSPEND: |
|
if (ehci->no_selective_suspend) |
|
break; |
|
if ((temp & PORT_PE) == 0 |
|
|| (temp & PORT_RESET) != 0) |
|
goto error; |
|
|
|
/* After above check the port must be connected. |
|
* Set appropriate bit thus could put phy into low power |
|
* mode if we have tdi_phy_lpm feature |
|
*/ |
|
temp &= ~PORT_WKCONN_E; |
|
temp |= PORT_WKDISC_E | PORT_WKOC_E; |
|
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
|
if (ehci->has_tdi_phy_lpm) { |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
msleep(5);/* 5ms for HCD enter low pwr mode */ |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
temp1 = ehci_readl(ehci, hostpc_reg); |
|
ehci_writel(ehci, temp1 | HOSTPC_PHCD, |
|
hostpc_reg); |
|
temp1 = ehci_readl(ehci, hostpc_reg); |
|
ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", |
|
wIndex, (temp1 & HOSTPC_PHCD) ? |
|
"succeeded" : "failed"); |
|
} |
|
if (ehci_has_fsl_susp_errata(ehci)) { |
|
/* 10ms for HCD enter suspend */ |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
usleep_range(10000, 20000); |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
} |
|
set_bit(wIndex, &ehci->suspended_ports); |
|
break; |
|
case USB_PORT_FEAT_POWER: |
|
if (HCS_PPC(ehci->hcs_params)) { |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
ehci_port_power(ehci, wIndex, true); |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
} |
|
break; |
|
case USB_PORT_FEAT_RESET: |
|
if (temp & (PORT_SUSPEND|PORT_RESUME)) |
|
goto error; |
|
/* line status bits may report this as low speed, |
|
* which can be fine if this root hub has a |
|
* transaction translator built in. |
|
*/ |
|
if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT |
|
&& !ehci_is_TDI(ehci) |
|
&& PORT_USB11 (temp)) { |
|
ehci_dbg (ehci, |
|
"port %d low speed --> companion\n", |
|
wIndex + 1); |
|
temp |= PORT_OWNER; |
|
} else { |
|
temp |= PORT_RESET; |
|
temp &= ~PORT_PE; |
|
|
|
/* |
|
* caller must wait, then call GetPortStatus |
|
* usb 2.0 spec says 50 ms resets on root |
|
*/ |
|
ehci->reset_done [wIndex] = jiffies |
|
+ msecs_to_jiffies (50); |
|
|
|
/* |
|
* Force full-speed connect for FSL high-speed |
|
* erratum; disable HS Chirp by setting PFSC bit |
|
*/ |
|
if (ehci_has_fsl_hs_errata(ehci)) |
|
temp |= (1 << PORTSC_FSL_PFSC); |
|
} |
|
ehci_writel(ehci, temp, status_reg); |
|
break; |
|
|
|
/* For downstream facing ports (these): one hub port is put |
|
* into test mode according to USB2 11.24.2.13, then the hub |
|
* must be reset (which for root hub now means rmmod+modprobe, |
|
* or else system reboot). See EHCI 2.3.9 and 4.14 for info |
|
* about the EHCI-specific stuff. |
|
*/ |
|
case USB_PORT_FEAT_TEST: |
|
#ifdef CONFIG_USB_HCD_TEST_MODE |
|
if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
retval = ehset_single_step_set_feature(hcd, |
|
wIndex + 1); |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
break; |
|
} |
|
#endif |
|
if (!selector || selector > 5) |
|
goto error; |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
ehci_quiesce(ehci); |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
|
|
/* Put all enabled ports into suspend */ |
|
while (ports--) { |
|
u32 __iomem *sreg = |
|
&ehci->regs->port_status[ports]; |
|
|
|
temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; |
|
if (temp & PORT_PE) |
|
ehci_writel(ehci, temp | PORT_SUSPEND, |
|
sreg); |
|
} |
|
|
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
ehci_halt(ehci); |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
|
|
temp = ehci_readl(ehci, status_reg); |
|
temp |= selector << 16; |
|
ehci_writel(ehci, temp, status_reg); |
|
break; |
|
|
|
default: |
|
goto error; |
|
} |
|
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
|
break; |
|
|
|
default: |
|
error: |
|
/* "stall" on error */ |
|
retval = -EPIPE; |
|
} |
|
error_exit: |
|
spin_unlock_irqrestore (&ehci->lock, flags); |
|
return retval; |
|
} |
|
EXPORT_SYMBOL_GPL(ehci_hub_control); |
|
|
|
static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
|
{ |
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
|
|
|
if (ehci_is_TDI(ehci)) |
|
return; |
|
set_owner(ehci, --portnum, PORT_OWNER); |
|
} |
|
|
|
static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
|
{ |
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
|
u32 __iomem *reg; |
|
|
|
if (ehci_is_TDI(ehci)) |
|
return 0; |
|
reg = &ehci->regs->port_status[portnum - 1]; |
|
return ehci_readl(ehci, reg) & PORT_OWNER; |
|
} |
|
|
|
static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) |
|
{ |
|
struct usb_hcd *hcd = ehci_to_hcd(ehci); |
|
u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; |
|
u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; |
|
|
|
if (enable) |
|
ehci_writel(ehci, temp | PORT_POWER, status_reg); |
|
else |
|
ehci_writel(ehci, temp & ~PORT_POWER, status_reg); |
|
|
|
if (hcd->driver->port_power) |
|
hcd->driver->port_power(hcd, portnum, enable); |
|
|
|
return 0; |
|
}
|
|
|