usb: dwc3: add disable receiver detection in P3 quirk

Some freescale QorIQ platforms require to disable receiver detection
in P3 for correct detection of USB devices. If GUSB3PIPECTL(DISRXDETINP3)
is set, Core will change PHY power state to P2 and then perform receiver
detection. After receiver detection, Core will change PHY power state to
P3. Same quirk would be added in dts file in future patches.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 05b7ec30266fc6e4e3c107f094470192f9399949..940489c1d1bdd4e43103f9491af6e9060d8ea693 100644 (file)
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -412,6 +412,9 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
        if (dwc->u2ss_inp3_quirk)
                reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
 
+       if (dwc->dis_rxdet_inp3_quirk)
+               reg |= DWC3_GUSB3PIPECTL_DISRXDETINP3;
+
        if (dwc->req_p1p2p3_quirk)
                reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
 
@@ -882,6 +885,8 @@ static int dwc3_probe(struct platform_device *pdev)
                                "snps,dis_u2_susphy_quirk");
        dwc->dis_enblslpm_quirk = device_property_read_bool(dev,
                                "snps,dis_enblslpm_quirk");
+       dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev,
+                               "snps,dis_rxdet_inp3_quirk");
 
        dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
                                "snps,tx_de_emphasis_quirk");
@@ -915,6 +920,7 @@ static int dwc3_probe(struct platform_device *pdev)
                dwc->dis_u3_susphy_quirk = pdata->dis_u3_susphy_quirk;
                dwc->dis_u2_susphy_quirk = pdata->dis_u2_susphy_quirk;
                dwc->dis_enblslpm_quirk = pdata->dis_enblslpm_quirk;
+               dwc->dis_rxdet_inp3_quirk = pdata->dis_rxdet_inp3_quirk;
 
                dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;
                if (pdata->tx_de_emphasis)

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index df72234a805b8ce4091696efadcbf4241939f0f1..f965e961b40e73534e1f80711924a1541d43c863 100644 (file)
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -193,6 +193,7 @@
 /* Global USB3 PIPE Control Register */
 #define DWC3_GUSB3PIPECTL_PHYSOFTRST   (1 << 31)
 #define DWC3_GUSB3PIPECTL_U2SSINP3OK   (1 << 29)
+#define DWC3_GUSB3PIPECTL_DISRXDETINP3 (1 << 28)
 #define DWC3_GUSB3PIPECTL_REQP1P2P3    (1 << 24)
 #define DWC3_GUSB3PIPECTL_DEP1P2P3(n)  ((n) << 19)
 #define DWC3_GUSB3PIPECTL_DEP1P2P3_MASK        DWC3_GUSB3PIPECTL_DEP1P2P3(7)
@@ -867,6 +868,7 @@ struct dwc3 {
        unsigned                dis_u3_susphy_quirk:1;
        unsigned                dis_u2_susphy_quirk:1;
        unsigned                dis_enblslpm_quirk:1;
+       unsigned                dis_rxdet_inp3_quirk:1;
 
        unsigned                tx_de_emphasis_quirk:1;
        unsigned                tx_de_emphasis:2;

diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index aaa6f00df755ba76cd49b87207ba55bcaf840b6c..8826cca5fc6f64c2d43330a71e8ffb9f87512fef 100644 (file)
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -42,6 +42,7 @@ struct dwc3_platform_data {
        unsigned dis_u3_susphy_quirk:1;
        unsigned dis_u2_susphy_quirk:1;
        unsigned dis_enblslpm_quirk:1;
+       unsigned dis_rxdet_inp3_quirk:1;
 
        unsigned tx_de_emphasis_quirk:1;
        unsigned tx_de_emphasis:2;