diff mbox series

[v2,09/15] usb: renesas_usbhs: add support for CNEN bit

Message ID 20190509201142.10543-10-chris.brandt@renesas.com (mailing list archive)
State Superseded
Delegated to: Geert Uytterhoeven
Headers show
Series usb: Add host and device support for RZ/A2 | expand

Commit Message

Chris Brandt May 9, 2019, 8:11 p.m. UTC 
For some SoC, CNEN must be set for USB Device mode operation.

Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
---
 drivers/usb/renesas_usbhs/common.c | 6 ++++++
 drivers/usb/renesas_usbhs/common.h | 2 ++
 2 files changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index efb26ffd9809..820636fc4dc9 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -116,6 +116,12 @@  void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
 	u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 	u16 val  = HSE | USBE;
 
+	/* CNEN bit is required for function operation */
+	if (usbhsc_flags_has(priv, USBHSF_HAS_CNEN)) {
+		mask |= CNEN;
+		val  |= CNEN;
+	}
+
 	/*
 	 * if enable
 	 *
diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h
index 1ca94b8f5508..211ab8e741be 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -104,6 +104,7 @@  struct usbhs_priv;
 
 /* SYSCFG */
 #define SCKE	(1 << 10)	/* USB Module Clock Enable */
+#define CNEN	(1 << 8)	/* Single-ended receiver operation Enable */
 #define HSE	(1 << 7)	/* High-Speed Operation Enable */
 #define DCFM	(1 << 6)	/* Controller Function Select */
 #define DRPD	(1 << 5)	/* D+ Line/D- Line Resistance Control */
@@ -343,6 +344,7 @@  struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev);
  * flags
  */
 #define USBHSF_RUNTIME_PWCTRL	(1 << 0)
+#define USBHSF_HAS_CNEN		(1 << 1) /* Single-ended receiver */
 
 #define usbhsc_flags_init(p)   ((p)->flags = 0)
 #define usbhsc_flags_set(p, b) ((p)->flags |=  (b))