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From 36f70702b66cd3453b65d46b5c26ea87d8897363 Mon Sep 17 00:00:00 2001
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From: Chunfeng Yun <chunfeng.yun@mediatek.com>
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Date: Fri, 13 Oct 2017 17:10:46 +0800
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Subject: [PATCH 112/224] usb: mtu3: set otg_sel for u2port only if works as
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dual-role mode
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When set otg_sel(SSUSB_U2_PORT_OTG_SEL) for u2port which supports
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dual-role mode, the controller will automatically switch mode
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between host and device according to IDDIG signal. But if the
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u2port only supports device mode, and no IDDIG pin is provided,
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setting otg_sel may cause failure of detection by host.
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So set it only for dual-role mode.
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Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
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Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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---
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drivers/usb/mtu3/mtu3_core.c | 9 +++++++--
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1 file changed, 7 insertions(+), 2 deletions(-)
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--- a/drivers/usb/mtu3/mtu3_core.c
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+++ b/drivers/usb/mtu3/mtu3_core.c
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@@ -115,7 +115,9 @@ static int mtu3_device_enable(struct mtu
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mtu3_clrbits(ibase, SSUSB_U2_CTRL(0),
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(SSUSB_U2_PORT_DIS | SSUSB_U2_PORT_PDN |
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SSUSB_U2_PORT_HOST_SEL));
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- mtu3_setbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_OTG_SEL);
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+
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+ if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG)
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+ mtu3_setbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_OTG_SEL);
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return ssusb_check_clocks(mtu->ssusb, check_clk);
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}
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@@ -130,7 +132,10 @@ static void mtu3_device_disable(struct m
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mtu3_setbits(ibase, SSUSB_U2_CTRL(0),
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SSUSB_U2_PORT_DIS | SSUSB_U2_PORT_PDN);
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- mtu3_clrbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_OTG_SEL);
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+
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+ if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG)
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+ mtu3_clrbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_OTG_SEL);
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+
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mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
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}
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