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Commit 1b898c3c authored by Manu Gautam's avatar Manu Gautam
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USB: ci13xxx_msm: Disable TXFIFO_IDLE_FORCE bit to prevent corruption 



There is a possibility of TX buffer corruption in core (device mode)
if TXFIFO_IDLE_FORCE chicken bit is left enabled. As this bit is not
required with the current core configuration, disable it.

CRs-fixed: 674673
Change-Id: I91c7ca3d02585858bb07c39444a577b3e59fc9c3
Signed-off-by: default avatarManu Gautam <mgautam@codeaurora.org>
parent 3bb9501c

drivers/usb/gadget/ci13xxx_msm.c

+6 −0
Original line number Diff line number Diff line
@@ -143,10 +143,16 @@ static void ci13xxx_msm_reset(void) 
	struct ci13xxx *udc = _udc;

	struct usb_phy *phy = udc->transceiver;

	struct device *dev = udc->gadget.dev.parent;

	int	temp;



	writel_relaxed(0, USB_AHBBURST);

	writel_relaxed(0x08, USB_AHBMODE);



	/* workaround for rx buffer collision issue */

	temp = readl_relaxed(USB_GENCONFIG);

	temp &= ~GENCONFIG_TXFIFO_IDLE_FORCE_DISABLE;

	writel_relaxed(temp, USB_GENCONFIG);



	if (udc->gadget.l1_supported)

		ci13xxx_msm_set_l1(udc);

include/linux/usb/msm_hsusb_hw.h

+1 −0
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ 
#define ULPI_DATA_READ(n)     (((n) >> 8) & 255)



#define GENCONFIG_BAM_DISABLE (1 << 13)

#define GENCONFIG_TXFIFO_IDLE_FORCE_DISABLE (1 << 4)



/* synopsys 28nm phy registers */

#define ULPI_PWR_CLK_MNG_REG	0x88