usb: mtu3: Super-Speed Peripheral mode support

add super-speed funtion for peripheral mode
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/mtu3/mtu3.h

@@ -53,6 +53,7 @@ struct mtu3_request;
 #define USB_QMU_TQSAR(epnum)	(U3D_TXQSAR1 + (((epnum) - 1) * 0x10))
 #define USB_QMU_TQCPR(epnum)	(U3D_TXQCPR1 + (((epnum) - 1) * 0x10))
 
+#define SSUSB_U3_CTRL(p)	(U3D_SSUSB_U3_CTRL_0P + ((p) * 0x08))
 #define SSUSB_U2_CTRL(p)	(U3D_SSUSB_U2_CTRL_0P + ((p) * 0x08))
 
 #define MTU3_DRIVER_NAME	"mtu3"
@@ -63,6 +64,7 @@ struct mtu3_request;
 #define MTU3_EP_WEDGE		BIT(2)
 #define MTU3_EP_BUSY		BIT(3)
 
+#define MTU3_U3_IP_SLOT_DEFAULT 2
 #define MTU3_U2_IP_SLOT_DEFAULT 1
 
 /**
@@ -87,6 +89,7 @@ enum mtu3_speed {
 	MTU3_SPEED_INACTIVE = 0,
 	MTU3_SPEED_FULL = 1,
 	MTU3_SPEED_HIGH = 3,
+	MTU3_SPEED_SUPER = 4,
 };
 
 /**
@@ -190,6 +193,7 @@ struct mtu3_ep {
 
 	struct list_head req_list;
 	struct mtu3_gpd_ring gpd_ring;
+	const struct usb_ss_ep_comp_descriptor *comp_desc;
 	const struct usb_endpoint_descriptor *desc;
 
 	int flags;
@@ -208,7 +212,8 @@ struct mtu3_request {
 
 /**
  * struct mtu3 - device driver instance data.
- * @slot: MTU3_U2_IP_SLOT_DEFAULT for U2 IP
+ * @slot: MTU3_U2_IP_SLOT_DEFAULT for U2 IP only,
+ *		MTU3_U3_IP_SLOT_DEFAULT for U3 IP
  * @may_wakeup: means device's remote wakeup is enabled
  * @is_self_powered: is reported in device status and the config descriptor
  * @ep0_req: dummy request used while handling standard USB requests
@@ -242,12 +247,16 @@ struct mtu3 {
 	struct usb_gadget_driver *gadget_driver;
 	struct mtu3_request ep0_req;
 	u8 setup_buf[EP0_RESPONSE_BUF];
+	u32 max_speed;
 
 	unsigned is_active:1;
 	unsigned may_wakeup:1;
 	unsigned is_self_powered:1;
 	unsigned test_mode:1;
 	unsigned softconnect:1;
+	unsigned u1_enable:1;
+	unsigned u2_enable:1;
+	unsigned is_u3_ip:1;
 
 	u8 address;
 	u8 test_mode_nr;
@@ -324,7 +333,7 @@ void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set);
 void mtu3_ep0_setup(struct mtu3 *mtu);
 void mtu3_start(struct mtu3 *mtu);
 void mtu3_stop(struct mtu3 *mtu);
-void mtu3_hs_softconn_set(struct mtu3 *mtu, bool enable);
+void mtu3_dev_on_off(struct mtu3 *mtu, int is_on);
 
 int mtu3_gadget_setup(struct mtu3 *mtu);
 void mtu3_gadget_cleanup(struct mtu3 *mtu);

drivers/usb/mtu3/mtu3_gadget.c

@@ -73,6 +73,7 @@ static void nuke(struct mtu3_ep *mep, const int status)
 static int mtu3_ep_enable(struct mtu3_ep *mep)
 {
 	const struct usb_endpoint_descriptor *desc;
+	const struct usb_ss_ep_comp_descriptor *comp_desc;
 	struct mtu3 *mtu = mep->mtu;
 	u32 interval = 0;
 	u32 mult = 0;
@@ -81,11 +82,24 @@ static int mtu3_ep_enable(struct mtu3_ep *mep)
 	int ret;
 
 	desc = mep->desc;
+	comp_desc = mep->comp_desc;
 	mep->type = usb_endpoint_type(desc);
 	max_packet = usb_endpoint_maxp(desc);
 	mep->maxp = max_packet & GENMASK(10, 0);
 
 	switch (mtu->g.speed) {
+	case USB_SPEED_SUPER:
+		if (usb_endpoint_xfer_int(desc) ||
+				usb_endpoint_xfer_isoc(desc)) {
+			interval = desc->bInterval;
+			interval = clamp_val(interval, 1, 16) - 1;
+			if (usb_endpoint_xfer_isoc(desc) && comp_desc)
+				mult = comp_desc->bmAttributes;
+		}
+		if (comp_desc)
+			burst = comp_desc->bMaxBurst;
+
+		break;
 	case USB_SPEED_HIGH:
 		if (usb_endpoint_xfer_isoc(desc) ||
 				usb_endpoint_xfer_int(desc)) {
@@ -103,6 +117,7 @@ static int mtu3_ep_enable(struct mtu3_ep *mep)
 
 	mep->ep.maxpacket = mep->maxp;
 	mep->ep.desc = desc;
+	mep->ep.comp_desc = comp_desc;
 
 	/* slot mainly affects bulk/isoc transfer, so ignore int */
 	mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot;
@@ -135,6 +150,7 @@ static int mtu3_ep_disable(struct mtu3_ep *mep)
 
 	mep->desc = NULL;
 	mep->ep.desc = NULL;
+	mep->comp_desc = NULL;
 	mep->type = 0;
 	mep->flags = 0;
 
@@ -178,6 +194,7 @@ static int mtu3_gadget_ep_enable(struct usb_ep *ep,
 
 	spin_lock_irqsave(&mtu->lock, flags);
 	mep->desc = desc;
+	mep->comp_desc = ep->comp_desc;
 
 	ret = mtu3_ep_enable(mep);
 	if (ret)
@@ -439,13 +456,15 @@ static int mtu3_gadget_wakeup(struct usb_gadget *gadget)
 		return  -EOPNOTSUPP;
 
 	spin_lock_irqsave(&mtu->lock, flags);
-
-	mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
-	spin_unlock_irqrestore(&mtu->lock, flags);
-	usleep_range(10000, 11000);
-	spin_lock_irqsave(&mtu->lock, flags);
-	mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
-
+	if (mtu->g.speed == USB_SPEED_SUPER) {
+		mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT);
+	} else {
+		mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
+		spin_unlock_irqrestore(&mtu->lock, flags);
+		usleep_range(10000, 11000);
+		spin_lock_irqsave(&mtu->lock, flags);
+		mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
+	}
 	spin_unlock_irqrestore(&mtu->lock, flags);
 	return 0;
 }
@@ -476,7 +495,7 @@ static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on)
 		mtu->softconnect = is_on;
 	} else if (is_on != mtu->softconnect) {
 		mtu->softconnect = is_on;
-		mtu3_hs_softconn_set(mtu, is_on);
+		mtu3_dev_on_off(mtu, is_on);
 	}
 
 	spin_unlock_irqrestore(&mtu->lock, flags);
@@ -524,7 +543,7 @@ static void stop_activity(struct mtu3 *mtu)
 	/* deactivate the hardware */
 	if (mtu->softconnect) {
 		mtu->softconnect = 0;
-		mtu3_hs_softconn_set(mtu, 0);
+		mtu3_dev_on_off(mtu, 0);
 	}
 
 	/*
@@ -587,14 +606,14 @@ static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
 	mep->ep.name = mep->name;
 	INIT_LIST_HEAD(&mep->ep.ep_list);
 
-	/* initialize maxpacket as HS */
+	/* initialize maxpacket as SS */
 	if (!epnum) {
-		usb_ep_set_maxpacket_limit(&mep->ep, 64);
+		usb_ep_set_maxpacket_limit(&mep->ep, 512);
 		mep->ep.caps.type_control = true;
 		mep->ep.ops = &mtu3_ep0_ops;
 		mtu->g.ep0 = &mep->ep;
 	} else {
-		usb_ep_set_maxpacket_limit(&mep->ep, 512);
+		usb_ep_set_maxpacket_limit(&mep->ep, 1024);
 		mep->ep.caps.type_iso = true;
 		mep->ep.caps.type_bulk = true;
 		mep->ep.caps.type_int = true;
@@ -637,7 +656,7 @@ int mtu3_gadget_setup(struct mtu3 *mtu)
 	int ret;
 
 	mtu->g.ops = &mtu3_gadget_ops;
-	mtu->g.max_speed = USB_SPEED_HIGH;
+	mtu->g.max_speed = mtu->max_speed;
 	mtu->g.speed = USB_SPEED_UNKNOWN;
 	mtu->g.sg_supported = 0;
 	mtu->g.name = MTU3_DRIVER_NAME;

drivers/usb/mtu3/mtu3_gadget_ep0.c

@@ -161,6 +161,41 @@ static int ep0_queue(struct mtu3_ep *mep0, struct mtu3_request *mreq);
 static void ep0_dummy_complete(struct usb_ep *ep, struct usb_request *req)
 {}
 
+static void ep0_set_sel_complete(struct usb_ep *ep, struct usb_request *req)
+{
+	struct mtu3_request *mreq;
+	struct mtu3 *mtu;
+	struct usb_set_sel_req sel;
+
+	memcpy(&sel, req->buf, sizeof(sel));
+
+	mreq = to_mtu3_request(req);
+	mtu = mreq->mtu;
+	dev_dbg(mtu->dev, "u1sel:%d, u1pel:%d, u2sel:%d, u2pel:%d\n",
+		sel.u1_sel, sel.u1_pel, sel.u2_sel, sel.u2_pel);
+}
+
+/* queue data stage to handle 6 byte SET_SEL request */
+static int ep0_set_sel(struct mtu3 *mtu, struct usb_ctrlrequest *setup)
+{
+	int ret;
+	u16 length = le16_to_cpu(setup->wLength);
+
+	if (unlikely(length != 6)) {
+		dev_err(mtu->dev, "%s wrong wLength:%d\n",
+			__func__, length);
+		return -EINVAL;
+	}
+
+	mtu->ep0_req.mep = mtu->ep0;
+	mtu->ep0_req.request.length = 6;
+	mtu->ep0_req.request.buf = mtu->setup_buf;
+	mtu->ep0_req.request.complete = ep0_set_sel_complete;
+	ret = ep0_queue(mtu->ep0, &mtu->ep0_req);
+
+	return ret < 0 ? ret : 1;
+}
+
 static int
 ep0_get_status(struct mtu3 *mtu, const struct usb_ctrlrequest *setup)
 {
@@ -174,6 +209,15 @@ ep0_get_status(struct mtu3 *mtu, const struct usb_ctrlrequest *setup)
 	case USB_RECIP_DEVICE:
 		result[0] = mtu->is_self_powered << USB_DEVICE_SELF_POWERED;
 		result[0] |= mtu->may_wakeup << USB_DEVICE_REMOTE_WAKEUP;
+		/* superspeed only */
+		if (mtu->g.speed == USB_SPEED_SUPER) {
+			result[0] |= mtu->u1_enable << USB_DEV_STAT_U1_ENABLED;
+			result[0] |= mtu->u2_enable << USB_DEV_STAT_U2_ENABLED;
+		}
+
+		dev_dbg(mtu->dev, "%s result=%x, U1=%x, U2=%x\n", __func__,
+			result[0], mtu->u1_enable, mtu->u2_enable);
+
 		break;
 	case USB_RECIP_INTERFACE:
 		break;
@@ -265,7 +309,9 @@ static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup)
 static int ep0_handle_feature_dev(struct mtu3 *mtu,
 		struct usb_ctrlrequest *setup, bool set)
 {
+	void __iomem *mbase = mtu->mac_base;
 	int handled = -EINVAL;
+	u32 lpc;
 
 	switch (le16_to_cpu(setup->wValue)) {
 	case USB_DEVICE_REMOTE_WAKEUP:
@@ -279,6 +325,36 @@ static int ep0_handle_feature_dev(struct mtu3 *mtu,
 
 		handled = handle_test_mode(mtu, setup);
 		break;
+	case USB_DEVICE_U1_ENABLE:
+		if (mtu->g.speed != USB_SPEED_SUPER ||
+			mtu->g.state != USB_STATE_CONFIGURED)
+			break;
+
+		lpc = mtu3_readl(mbase, U3D_LINK_POWER_CONTROL);
+		if (set)
+			lpc |= SW_U1_ACCEPT_ENABLE;
+		else
+			lpc &= ~SW_U1_ACCEPT_ENABLE;
+		mtu3_writel(mbase, U3D_LINK_POWER_CONTROL, lpc);
+
+		mtu->u1_enable = !!set;
+		handled = 1;
+		break;
+	case USB_DEVICE_U2_ENABLE:
+		if (mtu->g.speed != USB_SPEED_SUPER ||
+			mtu->g.state != USB_STATE_CONFIGURED)
+			break;
+
+		lpc = mtu3_readl(mbase, U3D_LINK_POWER_CONTROL);
+		if (set)
+			lpc |= SW_U2_ACCEPT_ENABLE;
+		else
+			lpc &= ~SW_U2_ACCEPT_ENABLE;
+		mtu3_writel(mbase, U3D_LINK_POWER_CONTROL, lpc);
+
+		mtu->u2_enable = !!set;
+		handled = 1;
+		break;
 	default:
 		handled = -EINVAL;
 		break;
@@ -303,6 +379,17 @@ static int ep0_handle_feature(struct mtu3 *mtu,
 	case USB_RECIP_DEVICE:
 		handled = ep0_handle_feature_dev(mtu, setup, set);
 		break;
+	case USB_RECIP_INTERFACE:
+		/* superspeed only */
+		if ((value == USB_INTRF_FUNC_SUSPEND)
+			&& (mtu->g.speed == USB_SPEED_SUPER)) {
+			/*
+			 * forward the request because function drivers
+			 * should handle it
+			 */
+			handled = 0;
+		}
+		break;
 	case USB_RECIP_ENDPOINT:
 		epnum = index & USB_ENDPOINT_NUMBER_MASK;
 		if (epnum == 0 || epnum >= mtu->num_eps ||
@@ -390,6 +477,9 @@ static int handle_standard_request(struct mtu3 *mtu,
 	case USB_REQ_GET_STATUS:
 		handled = ep0_get_status(mtu, setup);
 		break;
+	case USB_REQ_SET_SEL:
+		handled = ep0_set_sel(mtu, setup);
+		break;
 	case USB_REQ_SET_ISOCH_DELAY:
 		handled = 1;
 		break;

drivers/usb/mtu3/mtu3_hw_regs.h

@@ -260,13 +260,46 @@
 
 /*---------------- SSUSB_USB3_MAC_CSR REGISTER DEFINITION ----------------*/
 
+#define U3D_LTSSM_CTRL		(SSUSB_USB3_MAC_CSR_BASE + 0x0010)
 #define U3D_USB3_CONFIG		(SSUSB_USB3_MAC_CSR_BASE + 0x001C)
 
+#define U3D_LTSSM_INTR_ENABLE	(SSUSB_USB3_MAC_CSR_BASE + 0x013C)
+#define U3D_LTSSM_INTR		(SSUSB_USB3_MAC_CSR_BASE + 0x0140)
+
 /*---------------- SSUSB_USB3_MAC_CSR FIELD DEFINITION ----------------*/
 
+/* U3D_LTSSM_CTRL */
+#define FORCE_POLLING_FAIL	BIT(4)
+#define FORCE_RXDETECT_FAIL	BIT(3)
+#define SOFT_U3_EXIT_EN		BIT(2)
+#define COMPLIANCE_EN		BIT(1)
+#define U1_GO_U2_EN		BIT(0)
+
 /* U3D_USB3_CONFIG */
 #define USB3_EN			BIT(0)
 
+/* U3D_LTSSM_INTR_ENABLE */
+/* U3D_LTSSM_INTR */
+#define U3_RESUME_INTR		BIT(18)
+#define U3_LFPS_TMOUT_INTR	BIT(17)
+#define VBUS_FALL_INTR		BIT(16)
+#define VBUS_RISE_INTR		BIT(15)
+#define RXDET_SUCCESS_INTR	BIT(14)
+#define EXIT_U3_INTR		BIT(13)
+#define EXIT_U2_INTR		BIT(12)
+#define EXIT_U1_INTR		BIT(11)
+#define ENTER_U3_INTR		BIT(10)
+#define ENTER_U2_INTR		BIT(9)
+#define ENTER_U1_INTR		BIT(8)
+#define ENTER_U0_INTR		BIT(7)
+#define RECOVERY_INTR		BIT(6)
+#define WARM_RST_INTR		BIT(5)
+#define HOT_RST_INTR		BIT(4)
+#define LOOPBACK_INTR		BIT(3)
+#define COMPLIANCE_INTR		BIT(2)
+#define SS_DISABLE_INTR		BIT(1)
+#define SS_INACTIVE_INTR	BIT(0)
+
 /*---------------- SSUSB_USB3_SYS_CSR REGISTER DEFINITION ----------------*/
 
 #define U3D_LINK_UX_INACT_TIMER	(SSUSB_USB3_SYS_CSR_BASE + 0x020C)