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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>
This commit is contained in:
Rajesh Bhagat 2016-03-14 14:40:50 +05:30 committed by Felipe Balbi
parent 2c0b98ff29
commit e58dd35774
3 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/usb/dwc3/core.c
View File

@ -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)

2
drivers/usb/dwc3/core.h
View File

@ -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;

1
drivers/usb/dwc3/platform_data.h
View File

@ -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;