This patch adds a new field to the ehci-hcd private structure, for
holding the value of the EHCI Interrupt Enable register, together with
an inline routine for setting this value.
The ehci->intr-enable field will used in a following patch, when a
tasklet's bottom-half handler needs to restore the correct interrupt
mask.
Not-yet-signed-off-by: Alan Stern <st...@rowland.harvard.edu>
---
drivers/usb/host/ehci-hcd.c | 21 ++++++++++++++-------
drivers/usb/host/ehci-hub.c | 6 +++---
drivers/usb/host/ehci-timer.c | 2 +-
drivers/usb/host/ehci.h | 1 +
4 files changed, 19 insertions(+), 11 deletions(-)
Index: usb-3.11/drivers/usb/host/ehci-hcd.c
===================================================================
--- usb-3.11.orig/drivers/usb/host/ehci-hcd.c
+++ usb-3.11/drivers/usb/host/ehci-hcd.c
@@ -134,6 +134,12 @@ static inline unsigned ehci_read_frame_i
return ehci_readl(ehci, &ehci->regs->frame_index);
}
+static inline void ehci_set_intr_enable(struct ehci_hcd *ehci, u32 mask)
+{
+ ehci->intr_mask = mask;
+ ehci_writel(ehci, mask, &ehci->regs->intr_enable);
+}
+
#include "ehci-dbg.c"
/*-------------------------------------------------------------------------*/
@@ -194,7 +200,7 @@ static int ehci_halt (struct ehci_hcd *e
spin_lock_irq(&ehci->lock);
/* disable any irqs left enabled by previous code */
- ehci_writel(ehci, 0, &ehci->regs->intr_enable);
+ ehci_set_intr_enable(ehci, 0);
if (ehci_is_TDI(ehci) && !tdi_in_host_mode(ehci)) {
spin_unlock_irq(&ehci->lock);
@@ -639,8 +645,9 @@ static int ehci_run (struct usb_hcd *hcd
temp >> 8, temp & 0xff,
ignore_oc ? ", overcurrent ignored" : "");
- ehci_writel(ehci, INTR_MASK,
- &ehci->regs->intr_enable); /* Turn On Interrupts */
+ spin_lock_irq(&ehci->lock);
+ ehci_set_intr_enable(ehci, INTR_MASK); /* Turn on interrupts */
+ spin_unlock_irq(&ehci->lock);
/* GRR this is run-once init(), being done every time the HC starts.
* So long as they're part of class devices, we can't do it init()
@@ -817,7 +824,7 @@ dead:
ehci->rh_state = EHCI_RH_STOPPING;
ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
ehci_writel(ehci, ehci->command, &ehci->regs->command);
- ehci_writel(ehci, 0, &ehci->regs->intr_enable);
+ ehci_set_intr_enable(ehci, 0);
ehci_handle_controller_death(ehci);
/* Handle completions when the controller stops */
@@ -1080,7 +1087,7 @@ int ehci_suspend(struct usb_hcd *hcd, bo
ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
spin_lock_irq(&ehci->lock);
- ehci_writel(ehci, 0, &ehci->regs->intr_enable);
+ ehci_set_intr_enable(ehci, 0);
(void) ehci_readl(ehci, &ehci->regs->intr_enable);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
@@ -1111,7 +1118,7 @@ int ehci_resume(struct usb_hcd *hcd, boo
*/
if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
!hibernated) {
- int mask = INTR_MASK;
+ u32 mask = INTR_MASK;
ehci_prepare_ports_for_controller_resume(ehci);
@@ -1121,7 +1128,7 @@ int ehci_resume(struct usb_hcd *hcd, boo
if (!hcd->self.root_hub->do_remote_wakeup)
mask &= ~STS_PCD;
- ehci_writel(ehci, mask, &ehci->regs->intr_enable);
+ ehci_set_intr_enable(ehci, mask);
ehci_readl(ehci, &ehci->regs->intr_enable);
skip:
spin_unlock_irq(&ehci->lock);
Index: usb-3.11/drivers/usb/host/ehci-hub.c
===================================================================
--- usb-3.11.orig/drivers/usb/host/ehci-hub.c
+++ usb-3.11/drivers/usb/host/ehci-hub.c
@@ -352,7 +352,7 @@ static int ehci_bus_suspend (struct usb_
mask = INTR_MASK;
if (!hcd->self.root_hub->do_remote_wakeup)
mask &= ~STS_PCD;
- ehci_writel(ehci, mask, &ehci->regs->intr_enable);
+ ehci_set_intr_enable(ehci, mask);
ehci_readl(ehci, &ehci->regs->intr_enable);
done:
@@ -401,7 +401,7 @@ static int ehci_bus_resume (struct usb_h
/* 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);
+ ehci_set_intr_enable(ehci, 0);
/* re-init operational registers */
ehci_writel(ehci, 0, &ehci->regs->segment);
@@ -495,7 +495,7 @@ static int ehci_bus_resume (struct usb_h
spin_lock_irq(&ehci->lock);
if (ehci->shutdown)
goto shutdown;
- ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
+ ehci_set_intr_enable(ehci, INTR_MASK);
(void) ehci_readl(ehci, &ehci->regs->intr_enable);
spin_unlock_irq(&ehci->lock);
Index: usb-3.11/drivers/usb/host/ehci.h
===================================================================
--- usb-3.11.orig/drivers/usb/host/ehci.h
+++ usb-3.11/drivers/usb/host/ehci.h
@@ -186,6 +186,7 @@ struct ehci_hcd { /* one per controlle
unsigned long next_statechange;
ktime_t last_periodic_enable;
u32 command;
+ u32 intr_mask;
/* SILICON QUIRKS */
unsigned no_selective_suspend:1;
Index: usb-3.11/drivers/usb/host/ehci-timer.c
===================================================================
--- usb-3.11.orig/drivers/usb/host/ehci-timer.c
+++ usb-3.11/drivers/usb/host/ehci-timer.c
@@ -208,7 +208,7 @@ static void ehci_handle_controller_death
/* Clean up the mess */
ehci->rh_state = EHCI_RH_HALTED;
ehci_writel(ehci, 0, &ehci->regs->configured_flag);
- ehci_writel(ehci, 0, &ehci->regs->intr_enable);
+ ehci_set_intr_enable(ehci, 0);
ehci_work(ehci);
end_unlink_async(ehci);
--
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