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xhci: add helpers for enabling and disabling interrupters

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Simple helpers to set and clear the IE (interrupter enable) bit
for an interrupter.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230202150505.618915-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman 2023-02-02 17:04:58 +02:00 committed by Greg Kroah-Hartman
parent b17a57f89f
commit 52dd0483e8
1 changed files with 30 additions and 7 deletions
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37
drivers/usb/host/xhci.c
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@ -292,6 +292,32 @@ static void xhci_zero_64b_regs(struct xhci_hcd *xhci)
xhci_info(xhci, "Fault detected\n");
}
static int xhci_enable_interrupter(struct xhci_interrupter *ir)
{
u32 iman;
if (!ir || !ir->ir_set)
return -EINVAL;
iman = readl(&ir->ir_set->irq_pending);
writel(ER_IRQ_ENABLE(iman), &ir->ir_set->irq_pending);
return 0;
}
static int xhci_disable_interrupter(struct xhci_interrupter *ir)
{
u32 iman;
if (!ir || !ir->ir_set)
return -EINVAL;
iman = readl(&ir->ir_set->irq_pending);
writel(ER_IRQ_DISABLE(iman), &ir->ir_set->irq_pending);
return 0;
}
#ifdef CONFIG_USB_PCI
/*
* Set up MSI
@ -610,7 +636,6 @@ static int xhci_init(struct usb_hcd *hcd)
/*-------------------------------------------------------------------------*/
static int xhci_run_finished(struct xhci_hcd *xhci)
{
struct xhci_interrupter *ir = xhci->interrupter;
@ -629,8 +654,7 @@ static int xhci_run_finished(struct xhci_hcd *xhci)
writel(temp, &xhci->op_regs->command);
xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Enable primary interrupter");
temp = readl(&ir->ir_set->irq_pending);
writel(ER_IRQ_ENABLE(temp), &ir->ir_set->irq_pending);
xhci_enable_interrupter(ir);
if (xhci_start(xhci)) {
xhci_halt(xhci);
@ -734,6 +758,7 @@ static void xhci_stop(struct usb_hcd *hcd)
{
u32 temp;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct xhci_interrupter *ir = xhci->interrupter;
mutex_lock(&xhci->mutex);
@ -770,8 +795,7 @@ static void xhci_stop(struct usb_hcd *hcd)
"// Disabling event ring interrupts");
temp = readl(&xhci->op_regs->status);
writel((temp & ~0x1fff) | STS_EINT, &xhci->op_regs->status);
temp = readl(&xhci->interrupter->ir_set->irq_pending);
writel(ER_IRQ_DISABLE(temp), &xhci->interrupter->ir_set->irq_pending);
xhci_disable_interrupter(ir);
xhci_dbg_trace(xhci, trace_xhci_dbg_init, "cleaning up memory");
xhci_mem_cleanup(xhci);
@ -1227,8 +1251,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
xhci_dbg(xhci, "// Disabling event ring interrupts\n");
temp = readl(&xhci->op_regs->status);
writel((temp & ~0x1fff) | STS_EINT, &xhci->op_regs->status);
temp = readl(&xhci->interrupter->ir_set->irq_pending);
writel(ER_IRQ_DISABLE(temp), &xhci->interrupter->ir_set->irq_pending);
xhci_disable_interrupter(xhci->interrupter);
xhci_dbg(xhci, "cleaning up memory\n");
xhci_mem_cleanup(xhci);