usb: dwc3: omap: set idle and standby modes

For now, let's disable IDLE and STANDBY transitions
until we have a real HW to validate against.

Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc3/dwc3-omap.c

@@ -76,8 +76,23 @@
 /* SYSCONFIG REGISTER */
 #define USBOTGSS_SYSCONFIG_DMADISABLE		(1 << 16)
 #define USBOTGSS_SYSCONFIG_STANDBYMODE(x)	((x) << 4)
+
+#define USBOTGSS_STANDBYMODE_FORCE_STANDBY	0
+#define USBOTGSS_STANDBYMODE_NO_STANDBY		1
+#define USBOTGSS_STANDBYMODE_SMART_STANDBY	2
+#define USBOTGSS_STANDBYMODE_SMART_WAKEUP	3
+
+#define USBOTGSS_STANDBYMODE_MASK		(0x03 << 4)
+
 #define USBOTGSS_SYSCONFIG_IDLEMODE(x)		((x) << 2)
 
+#define USBOTGSS_IDLEMODE_FORCE_IDLE		0
+#define USBOTGSS_IDLEMODE_NO_IDLE		1
+#define USBOTGSS_IDLEMODE_SMART_IDLE		2
+#define USBOTGSS_IDLEMODE_SMART_WAKEUP		3
+
+#define USBOTGSS_IDLEMODE_MASK			(0x03 << 2)
+
 /* IRQ_EOI REGISTER */
 #define USBOTGSS_IRQ_EOI_LINE_NUMBER		(1 << 0)
 
@@ -270,6 +285,15 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 	reg = dwc3_readl(omap->base, USBOTGSS_SYSCONFIG);
 	omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
 
+	/* Set No-Idle and No-Standby */
+	reg &= ~(USBOTGSS_STANDBYMODE_MASK
+			| USBOTGSS_IDLEMODE_MASK);
+
+	reg |= (USBOTGSS_SYSCONFIG_STANDBYMODE(USBOTGSS_STANDBYMODE_NO_STANDBY)
+		| USBOTGSS_SYSCONFIG_IDLEMODE(USBOTGSS_IDLEMODE_NO_IDLE));
+
+	dwc3_writel(omap->base, USBOTGSS_SYSCONFIG, reg);
+
 	ret = request_irq(omap->irq, dwc3_omap_interrupt, 0,
 			"dwc3-omap", omap);
 	if (ret) {