From c344b518008ada3170349d1c06e8a30224400b29 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Wed, 14 Aug 2013 12:44:09 +0300 Subject: usb: chipidea: disable all interrupts and clear all interrupts status During the initialization, it needs to disable all interrupts enable bit as well as clear all interrupts status bits to avoid exceptional interrupt. Tested-by: Marek Vasut Signed-off-by: Peter Chen Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/core.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index ab01e18bc2f8..e9cfd3193d65 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -199,6 +199,12 @@ static int hw_device_init(struct ci_hdrc *ci, void __iomem *base) if (ci->hw_ep_max > ENDPT_MAX) return -ENODEV; + /* Disable all interrupts bits */ + hw_write(ci, OP_USBINTR, 0xffffffff, 0); + + /* Clear all interrupts status bits*/ + hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff); + dev_dbg(ci->dev, "ChipIdea HDRC found, lpm: %d; cap: %p op: %p\n", ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op); @@ -434,8 +440,11 @@ static void ci_get_otg_capable(struct ci_hdrc *ci) ci->is_otg = (hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DC | DCCPARAMS_HC) == (DCCPARAMS_DC | DCCPARAMS_HC)); - if (ci->is_otg) + if (ci->is_otg) { dev_dbg(ci->dev, "It is OTG capable controller\n"); + ci_disable_otg_interrupt(ci, OTGSC_INT_EN_BITS); + ci_clear_otg_interrupt(ci, OTGSC_INT_STATUS_BITS); + } } static int ci_hdrc_probe(struct platform_device *pdev) -- cgit v1.2.3