diff options
| author | Neil Zhang <zhangwm@marvell.com> | 2011-11-30 09:57:14 +0800 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2011-12-12 11:45:23 +0200 |
| commit | 309d6d2be42c895c424a5090fcc2e95ce2d8499a (patch) | |
| tree | e306c8d54b7ffe8743d0a67eb04f28587052d587 /drivers/usb/gadget/mv_udc_core.c | |
| parent | 487d54d172b3afd3d2bf124b24eaf7f7e7b8a668 (diff) | |
| download | linux-309d6d2be42c895c424a5090fcc2e95ce2d8499a.tar.bz2 | |
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>
Diffstat (limited to 'drivers/usb/gadget/mv_udc_core.c')
| -rw-r--r-- | drivers/usb/gadget/mv_udc_core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c index 647cc3ab1709..6ff0b6b238ac 100644 --- a/drivers/usb/gadget/mv_udc_core.c +++ b/drivers/usb/gadget/mv_udc_core.c @@ -1056,6 +1056,8 @@ static void udc_stop(struct mv_udc *udc) USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN); writel(tmp, &udc->op_regs->usbintr); + udc->stopped = 1; + /* Reset the Run the bit in the command register to stop VUSB */ tmp = readl(&udc->op_regs->usbcmd); tmp &= ~USBCMD_RUN_STOP; @@ -1072,6 +1074,8 @@ static void udc_start(struct mv_udc *udc) /* Enable interrupts */ writel(usbintr, &udc->op_regs->usbintr); + udc->stopped = 0; + /* Set the Run bit in the command register */ 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; u32 status, intr; + /* Disable ISR when stopped bit is set */ + if (udc->stopped) + return IRQ_NONE; + spin_lock(&udc->lock); status = readl(&udc->op_regs->usbsts); |