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OpenCloudOS-Kernel
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usb: gadget: mv_udc: disable ISR when stopped 

When device is stopped, there is no need to handle ISR.
Especially when otg switch to HOST mode.

Signed-off-by: Neil Zhang <zhangwm@marvell.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Neil Zhang 2011-11-30 09:57:14 +08:00 committed by Felipe Balbi
parent 487d54d172
commit 309d6d2be4
2 changed files with 10 additions and 1 deletions
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3
drivers/usb/gadget/mv_udc.h
View File

@ -211,7 +211,8 @@ struct mv_udc {
softconnected:1, softconnected:1,
force_fs:1, force_fs:1,
clock_gating:1, clock_gating:1,
active:1; active:1,
stopped:1; /* stop bit is setted */
struct work_struct vbus_work; struct work_struct vbus_work;
struct workqueue_struct *qwork; struct workqueue_struct *qwork;

8
drivers/usb/gadget/mv_udc_core.c
View File

@ -1056,6 +1056,8 @@ static void udc_stop(struct mv_udc *udc)
USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN); USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN);
writel(tmp, &udc->op_regs->usbintr); writel(tmp, &udc->op_regs->usbintr);
udc->stopped = 1;
/* Reset the Run the bit in the command register to stop VUSB */ /* Reset the Run the bit in the command register to stop VUSB */
tmp = readl(&udc->op_regs->usbcmd); tmp = readl(&udc->op_regs->usbcmd);
tmp &= ~USBCMD_RUN_STOP; tmp &= ~USBCMD_RUN_STOP;
@ -1072,6 +1074,8 @@ static void udc_start(struct mv_udc *udc)
/* Enable interrupts */ /* Enable interrupts */
writel(usbintr, &udc->op_regs->usbintr); writel(usbintr, &udc->op_regs->usbintr);
udc->stopped = 0;
/* Set the Run bit in the command register */ /* Set the Run bit in the command register */
writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd); writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd);
} }
@ -2040,6 +2044,10 @@ static irqreturn_t mv_udc_irq(int irq, void *dev)
struct mv_udc *udc = (struct mv_udc *)dev; struct mv_udc *udc = (struct mv_udc *)dev;
u32 status, intr; u32 status, intr;
/* Disable ISR when stopped bit is set */
if (udc->stopped)
return IRQ_NONE;
spin_lock(&udc->lock); spin_lock(&udc->lock);
status = readl(&udc->op_regs->usbsts); status = readl(&udc->op_regs->usbsts);