usb: gadget: renesas_usbhs: add usbhs_set_device_speed() support for host

mod_host needs device speed setup function
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/renesas_usbhs/common.c

@@ -226,6 +226,48 @@ static void usbhsc_bus_init(struct usbhs_priv *priv)
 	usbhs_vbus_ctrl(priv, 0);
 }
 
+/*
+ *		device configuration
+ */
+int usbhs_set_device_speed(struct usbhs_priv *priv, int devnum,
+			   u16 upphub, u16 hubport, u16 speed)
+{
+	struct device *dev = usbhs_priv_to_dev(priv);
+	u16 usbspd = 0;
+	u32 reg = DEVADD0 + (2 * devnum);
+
+	if (devnum > 10) {
+		dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
+		return -EIO;
+	}
+
+	if (upphub > 0xA) {
+		dev_err(dev, "unsupported hub number %d\n", upphub);
+		return -EIO;
+	}
+
+	switch (speed) {
+	case USB_SPEED_LOW:
+		usbspd = USBSPD_SPEED_LOW;
+		break;
+	case USB_SPEED_FULL:
+		usbspd = USBSPD_SPEED_FULL;
+		break;
+	case USB_SPEED_HIGH:
+		usbspd = USBSPD_SPEED_HIGH;
+		break;
+	default:
+		dev_err(dev, "unsupported speed %d\n", speed);
+		return -EIO;
+	}
+
+	usbhs_write(priv, reg,	UPPHUB(upphub)	|
+				HUBPORT(hubport)|
+				USBSPD(usbspd));
+
+	return 0;
+}
+
 /*
  *		local functions
  */

drivers/usb/renesas_usbhs/common.h

@@ -90,6 +90,17 @@ struct usbhs_priv;
 #define PIPE9TRN	0x00BA
 #define PIPEATRE	0x00BC
 #define PIPEATRN	0x00BE
+#define DEVADD0		0x00D0 /* Device address n configuration */
+#define DEVADD1		0x00D2
+#define DEVADD2		0x00D4
+#define DEVADD3		0x00D6
+#define DEVADD4		0x00D8
+#define DEVADD5		0x00DA
+#define DEVADD6		0x00DC
+#define DEVADD7		0x00DE
+#define DEVADD8		0x00E0
+#define DEVADD9		0x00E2
+#define DEVADDA		0x00E4
 
 /* SYSCFG */
 #define SCKE	(1 << 10)	/* USB Module Clock Enable */
@@ -206,6 +217,14 @@ struct usbhs_priv;
 /* FRMNUM */
 #define FRNM_MASK	(0x7FF)
 
+/* DEVADDn */
+#define UPPHUB(x)	(((x) & 0xF) << 11)	/* HUB Register */
+#define HUBPORT(x)	(((x) & 0x7) << 8)	/* HUB Port for Target Device */
+#define USBSPD(x)	(((x) & 0x3) << 6)	/* Device Transfer Rate */
+#define USBSPD_SPEED_LOW	0x1
+#define USBSPD_SPEED_FULL	0x2
+#define USBSPD_SPEED_HIGH	0x3
+
 /*
  *		struct
  */
@@ -280,6 +299,12 @@ int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable);
  */
 int usbhs_frame_get_num(struct usbhs_priv *priv);
 
+/*
+ * device config
+ */
+int usbhs_set_device_speed(struct usbhs_priv *priv, int devnum, u16 upphub,
+			   u16 hubport, u16 speed);
+
 /*
  * data
  */