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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 <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen 2013-08-14 12:44:09 +03:00 committed by Greg Kroah-Hartman
parent 577b232fc9
commit c344b51800
1 changed files with 10 additions and 1 deletions
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11
drivers/usb/chipidea/core.c
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@ -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)