Resguardo inicial

linux-7.2.3/drivers/usb/gadget/udc/cdns2/Kconfig

@@ -0,0 +1,11 @@
+config USB_CDNS2_UDC
+	tristate "Cadence USBHS Device Controller"
+	depends on USB_PCI && ACPI && HAS_DMA
+	help
+	  Cadence USBHS Device controller is a PCI based USB peripheral
+	  controller which supports both full and high speed USB 2.0
+	  data transfers.
+
+	  Say "y" to link the driver statically, or "m" to build a
+	  dynamically linked module called "cdns2-udc-pci.ko" and to
+	  force all gadget drivers to also be dynamically linked.

linux-7.2.3/drivers/usb/gadget/udc/cdns2/Makefile

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+# define_trace.h needs to know how to find our header
+CFLAGS_cdns2-trace.o		:= -I$(src)
+
+obj-$(CONFIG_USB_CDNS2_UDC)		+= cdns2-udc-pci.o
+cdns2-udc-pci-$(CONFIG_USB_CDNS2_UDC)	+= cdns2-pci.o cdns2-gadget.o cdns2-ep0.o
+cdns2-udc-pci-$(CONFIG_TRACING)	+= cdns2-trace.o

linux-7.2.3/drivers/usb/gadget/udc/cdns2/cdns2-debug.h

@@ -0,0 +1,203 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence USBHS-DEV Driver.
+ * Debug header file.
+ *
+ * Copyright (C) 2023 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#ifndef __LINUX_CDNS2_DEBUG
+#define __LINUX_CDNS2_DEBUG
+
+static inline const char *cdns2_decode_usb_irq(char *str, size_t size,
+					       u8 usb_irq, u8 ext_irq)
+{
+	int ret;
+
+	ret = scnprintf(str, size, "usbirq: 0x%02x - ", usb_irq);
+
+	if (usb_irq & USBIRQ_SOF)
+		ret += scnprintf(str + ret, size - ret, "SOF ");
+	if (usb_irq & USBIRQ_SUTOK)
+		ret += scnprintf(str + ret, size - ret, "SUTOK ");
+	if (usb_irq & USBIRQ_SUDAV)
+		ret += scnprintf(str + ret, size - ret, "SETUP ");
+	if (usb_irq & USBIRQ_SUSPEND)
+		ret += scnprintf(str + ret, size - ret, "Suspend ");
+	if (usb_irq & USBIRQ_URESET)
+		ret += scnprintf(str + ret, size - ret, "Reset ");
+	if (usb_irq & USBIRQ_HSPEED)
+		ret += scnprintf(str + ret, size - ret, "HS ");
+	if (usb_irq & USBIRQ_LPM)
+		ret += scnprintf(str + ret, size - ret, "LPM ");
+
+	ret += scnprintf(str + ret, size - ret, ", EXT: 0x%02x - ", ext_irq);
+
+	if (ext_irq & EXTIRQ_WAKEUP)
+		ret += scnprintf(str + ret, size - ret, "Wakeup ");
+	if (ext_irq & EXTIRQ_VBUSFAULT_FALL)
+		ret += scnprintf(str + ret, size - ret, "VBUS_FALL ");
+	if (ext_irq & EXTIRQ_VBUSFAULT_RISE)
+		ret += scnprintf(str + ret, size - ret, "VBUS_RISE ");
+
+	if (ret == size - 1)
+		pr_info("CDNS2: buffer may be truncated.\n");
+
+	return str;
+}
+
+static inline const char *cdns2_decode_dma_irq(char *str, size_t size,
+					       u32 ep_ists, u32 ep_sts,
+					       const char *ep_name)
+{
+	int ret;
+
+	ret = scnprintf(str, size, "ISTS: %08x, %s: %08x ",
+			ep_ists, ep_name, ep_sts);
+
+	if (ep_sts & DMA_EP_STS_IOC)
+		ret += scnprintf(str + ret, size - ret, "IOC ");
+	if (ep_sts & DMA_EP_STS_ISP)
+		ret += scnprintf(str + ret, size - ret, "ISP ");
+	if (ep_sts & DMA_EP_STS_DESCMIS)
+		ret += scnprintf(str + ret, size - ret, "DESCMIS ");
+	if (ep_sts & DMA_EP_STS_TRBERR)
+		ret += scnprintf(str + ret, size - ret, "TRBERR ");
+	if (ep_sts & DMA_EP_STS_OUTSMM)
+		ret += scnprintf(str + ret, size - ret, "OUTSMM ");
+	if (ep_sts & DMA_EP_STS_ISOERR)
+		ret += scnprintf(str + ret, size - ret, "ISOERR ");
+	if (ep_sts & DMA_EP_STS_DBUSY)
+		ret += scnprintf(str + ret, size - ret, "DBUSY ");
+	if (DMA_EP_STS_CCS(ep_sts))
+		ret += scnprintf(str + ret, size - ret, "CCS ");
+
+	if (ret == size - 1)
+		pr_info("CDNS2: buffer may be truncated.\n");
+
+	return str;
+}
+
+static inline const char *cdns2_decode_epx_irq(char *str, size_t size,
+					       char *ep_name, u32 ep_ists,
+					       u32 ep_sts)
+{
+	return cdns2_decode_dma_irq(str, size, ep_ists, ep_sts, ep_name);
+}
+
+static inline const char *cdns2_decode_ep0_irq(char *str, size_t size,
+					       u32 ep_ists, u32 ep_sts,
+					       int dir)
+{
+	return cdns2_decode_dma_irq(str, size, ep_ists, ep_sts,
+				    dir ? "ep0IN" : "ep0OUT");
+}
+
+static inline const char *cdns2_raw_ring(struct cdns2_endpoint *pep,
+					 struct cdns2_trb *trbs,
+					 char *str, size_t size)
+{
+	struct cdns2_ring *ring = &pep->ring;
+	struct cdns2_trb *trb;
+	dma_addr_t dma;
+	int ret;
+	int i;
+
+	ret = scnprintf(str, size, "\n\t\tTR for %s:", pep->name);
+
+	trb = &trbs[ring->dequeue];
+	dma = cdns2_trb_virt_to_dma(pep, trb);
+	ret += scnprintf(str + ret, size - ret,
+			 "\n\t\tRing deq index: %d, trb: V=%p, P=0x%pad\n",
+			 ring->dequeue, trb, &dma);
+
+	trb = &trbs[ring->enqueue];
+	dma = cdns2_trb_virt_to_dma(pep, trb);
+	ret += scnprintf(str + ret, size - ret,
+			 "\t\tRing enq index: %d, trb: V=%p, P=0x%pad\n",
+			 ring->enqueue, trb, &dma);
+
+	ret += scnprintf(str + ret, size - ret,
+			 "\t\tfree trbs: %d, CCS=%d, PCS=%d\n",
+			 ring->free_trbs, ring->ccs, ring->pcs);
+
+	if (TRBS_PER_SEGMENT > 40) {
+		ret += scnprintf(str + ret, size - ret,
+				 "\t\tTransfer ring %d too big\n", TRBS_PER_SEGMENT);
+		return str;
+	}
+
+	dma = ring->dma;
+	for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
+		trb = &trbs[i];
+		ret += scnprintf(str + ret, size - ret,
+				 "\t\t@%pad %08x %08x %08x\n", &dma,
+				 le32_to_cpu(trb->buffer),
+				 le32_to_cpu(trb->length),
+				 le32_to_cpu(trb->control));
+		dma += sizeof(*trb);
+	}
+
+	if (ret == size - 1)
+		pr_info("CDNS2: buffer may be truncated.\n");
+
+	return str;
+}
+
+static inline const char *cdns2_trb_type_string(u8 type)
+{
+	switch (type) {
+	case TRB_NORMAL:
+		return "Normal";
+	case TRB_LINK:
+		return "Link";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static inline const char *cdns2_decode_trb(char *str, size_t size, u32 flags,
+					   u32 length, u32 buffer)
+{
+	int type = TRB_FIELD_TO_TYPE(flags);
+	int ret;
+
+	switch (type) {
+	case TRB_LINK:
+		ret = scnprintf(str, size,
+				"LINK %08x type '%s' flags %c:%c:%c%c:%c",
+				buffer, cdns2_trb_type_string(type),
+				flags & TRB_CYCLE ? 'C' : 'c',
+				flags & TRB_TOGGLE ? 'T' : 't',
+				flags & TRB_CHAIN ? 'C' : 'c',
+				flags & TRB_CHAIN ? 'H' : 'h',
+				flags & TRB_IOC ? 'I' : 'i');
+		break;
+	case TRB_NORMAL:
+		ret = scnprintf(str, size,
+				"type: '%s', Buffer: %08x, length: %ld, burst len: %ld, "
+				"flags %c:%c:%c%c:%c",
+				cdns2_trb_type_string(type),
+				buffer, TRB_LEN(length),
+				TRB_FIELD_TO_BURST(length),
+				flags & TRB_CYCLE ? 'C' : 'c',
+				flags & TRB_ISP ? 'I' : 'i',
+				flags & TRB_CHAIN ? 'C' : 'c',
+				flags & TRB_CHAIN ? 'H' : 'h',
+				flags & TRB_IOC ? 'I' : 'i');
+		break;
+	default:
+		ret = scnprintf(str, size, "type '%s' -> raw %08x %08x %08x",
+				cdns2_trb_type_string(type),
+				buffer, length, flags);
+	}
+
+	if (ret == size - 1)
+		pr_info("CDNS2: buffer may be truncated.\n");
+
+	return str;
+}
+
+#endif /*__LINUX_CDNS2_DEBUG*/

linux-7.2.3/drivers/usb/gadget/udc/cdns2/cdns2-ep0.c

@@ -0,0 +1,659 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBHS-DEV driver.
+ *
+ * Copyright (C) 2023 Cadence Design Systems.
+ *
+ * Authors: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#include <linux/usb/composite.h>
+#include <linux/unaligned.h>
+
+#include "cdns2-gadget.h"
+#include "cdns2-trace.h"
+
+static struct usb_endpoint_descriptor cdns2_gadget_ep0_desc = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bmAttributes =	 USB_ENDPOINT_XFER_CONTROL,
+	.wMaxPacketSize = cpu_to_le16(64)
+};
+
+static int cdns2_w_index_to_ep_index(u16 wIndex)
+{
+	if (!(wIndex & USB_ENDPOINT_NUMBER_MASK))
+		return 0;
+
+	return ((wIndex & USB_ENDPOINT_NUMBER_MASK) * 2) +
+		(wIndex & USB_ENDPOINT_DIR_MASK ? 1 : 0) - 1;
+}
+
+static bool cdns2_check_new_setup(struct cdns2_device *pdev)
+{
+	u8 reg;
+
+	reg = readb(&pdev->ep0_regs->cs);
+
+	return !!(reg & EP0CS_CHGSET);
+}
+
+static void cdns2_ep0_enqueue(struct cdns2_device *pdev, dma_addr_t dma_addr,
+			      unsigned int length, int zlp)
+{
+	struct cdns2_adma_regs __iomem *regs = pdev->adma_regs;
+	struct cdns2_endpoint *pep = &pdev->eps[0];
+	struct cdns2_ring *ring = &pep->ring;
+
+	ring->trbs[0].buffer = cpu_to_le32(TRB_BUFFER(dma_addr));
+	ring->trbs[0].length = cpu_to_le32(TRB_LEN(length));
+
+	if (zlp) {
+		ring->trbs[0].control = cpu_to_le32(TRB_CYCLE |
+						    TRB_TYPE(TRB_NORMAL));
+		ring->trbs[1].buffer = cpu_to_le32(TRB_BUFFER(dma_addr));
+		ring->trbs[1].length = cpu_to_le32(TRB_LEN(0));
+		ring->trbs[1].control = cpu_to_le32(TRB_CYCLE | TRB_IOC |
+					TRB_TYPE(TRB_NORMAL));
+	} else {
+		ring->trbs[0].control = cpu_to_le32(TRB_CYCLE | TRB_IOC |
+					TRB_TYPE(TRB_NORMAL));
+		ring->trbs[1].control = 0;
+	}
+
+	trace_cdns2_queue_trb(pep, ring->trbs);
+
+	if (!pep->dir)
+		writel(0, &pdev->ep0_regs->rxbc);
+
+	cdns2_select_ep(pdev, pep->dir);
+
+	writel(DMA_EP_STS_TRBERR, &regs->ep_sts);
+	writel(pep->ring.dma, &regs->ep_traddr);
+
+	trace_cdns2_doorbell_ep0(pep, readl(&regs->ep_traddr));
+
+	writel(DMA_EP_CMD_DRDY, &regs->ep_cmd);
+}
+
+static int cdns2_ep0_delegate_req(struct cdns2_device *pdev)
+{
+	int ret;
+
+	spin_unlock(&pdev->lock);
+	ret = pdev->gadget_driver->setup(&pdev->gadget, &pdev->setup);
+	spin_lock(&pdev->lock);
+
+	return ret;
+}
+
+static void cdns2_ep0_stall(struct cdns2_device *pdev)
+{
+	struct cdns2_endpoint *pep = &pdev->eps[0];
+	struct cdns2_request *preq;
+
+	preq = cdns2_next_preq(&pep->pending_list);
+	set_reg_bit_8(&pdev->ep0_regs->cs, EP0CS_DSTALL);
+
+	if (pdev->ep0_stage == CDNS2_DATA_STAGE && preq)
+		cdns2_gadget_giveback(pep, preq, -ECONNRESET);
+	else if (preq)
+		list_del_init(&preq->list);
+
+	pdev->ep0_stage = CDNS2_SETUP_STAGE;
+	pep->ep_state |= EP_STALLED;
+}
+
+static void cdns2_status_stage(struct cdns2_device *pdev)
+{
+	struct cdns2_endpoint *pep = &pdev->eps[0];
+	struct cdns2_request *preq;
+
+	preq = cdns2_next_preq(&pep->pending_list);
+	if (preq)
+		list_del_init(&preq->list);
+
+	pdev->ep0_stage = CDNS2_SETUP_STAGE;
+	writeb(EP0CS_HSNAK, &pdev->ep0_regs->cs);
+}
+
+static int cdns2_req_ep0_set_configuration(struct cdns2_device *pdev,
+					   struct usb_ctrlrequest *ctrl_req)
+{
+	enum usb_device_state state = pdev->gadget.state;
+	u32 config = le16_to_cpu(ctrl_req->wValue);
+	int ret;
+
+	if (state < USB_STATE_ADDRESS) {
+		dev_err(pdev->dev, "Set Configuration - bad device state\n");
+		return -EINVAL;
+	}
+
+	ret = cdns2_ep0_delegate_req(pdev);
+	if (ret)
+		return ret;
+
+	trace_cdns2_device_state(config ? "configured" : "addressed");
+
+	if (!config)
+		usb_gadget_set_state(&pdev->gadget, USB_STATE_ADDRESS);
+
+	return 0;
+}
+
+static int cdns2_req_ep0_set_address(struct cdns2_device *pdev, u32 addr)
+{
+	enum usb_device_state device_state = pdev->gadget.state;
+	u8 reg;
+
+	if (addr > USB_DEVICE_MAX_ADDRESS) {
+		dev_err(pdev->dev,
+			"Device address (%d) cannot be greater than %d\n",
+			addr, USB_DEVICE_MAX_ADDRESS);
+		return -EINVAL;
+	}
+
+	if (device_state == USB_STATE_CONFIGURED) {
+		dev_err(pdev->dev,
+			"can't set_address from configured state\n");
+		return -EINVAL;
+	}
+
+	reg = readb(&pdev->usb_regs->fnaddr);
+	pdev->dev_address = reg;
+
+	usb_gadget_set_state(&pdev->gadget,
+			     (addr ? USB_STATE_ADDRESS : USB_STATE_DEFAULT));
+
+	trace_cdns2_device_state(addr ? "addressed" : "default");
+
+	return 0;
+}
+
+static int cdns2_req_ep0_handle_status(struct cdns2_device *pdev,
+				       struct usb_ctrlrequest *ctrl)
+{
+	struct cdns2_endpoint *pep;
+	__le16 *response_pkt;
+	u16 status = 0;
+	int ep_sts;
+	u32 recip;
+
+	recip = ctrl->bRequestType & USB_RECIP_MASK;
+
+	switch (recip) {
+	case USB_RECIP_DEVICE:
+		status = pdev->gadget.is_selfpowered;
+		status |= pdev->may_wakeup << USB_DEVICE_REMOTE_WAKEUP;
+		break;
+	case USB_RECIP_INTERFACE:
+		return cdns2_ep0_delegate_req(pdev);
+	case USB_RECIP_ENDPOINT:
+		ep_sts = cdns2_w_index_to_ep_index(le16_to_cpu(ctrl->wIndex));
+		pep = &pdev->eps[ep_sts];
+
+		if (pep->ep_state & EP_STALLED)
+			status =  BIT(USB_ENDPOINT_HALT);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	put_unaligned_le16(status, (__le16 *)pdev->ep0_preq.request.buf);
+
+	cdns2_ep0_enqueue(pdev, pdev->ep0_preq.request.dma,
+			  sizeof(*response_pkt), 0);
+
+	return 0;
+}
+
+static int cdns2_ep0_handle_feature_device(struct cdns2_device *pdev,
+					   struct usb_ctrlrequest *ctrl,
+					   int set)
+{
+	enum usb_device_state state;
+	enum usb_device_speed speed;
+	int ret = 0;
+	u32 wValue;
+	u16 tmode;
+
+	wValue = le16_to_cpu(ctrl->wValue);
+	state = pdev->gadget.state;
+	speed = pdev->gadget.speed;
+
+	switch (wValue) {
+	case USB_DEVICE_REMOTE_WAKEUP:
+		pdev->may_wakeup = !!set;
+		break;
+	case USB_DEVICE_TEST_MODE:
+		if (state != USB_STATE_CONFIGURED || speed > USB_SPEED_HIGH)
+			return -EINVAL;
+
+		tmode = le16_to_cpu(ctrl->wIndex);
+
+		if (!set || (tmode & 0xff) != 0)
+			return -EINVAL;
+
+		tmode >>= 8;
+		switch (tmode) {
+		case USB_TEST_J:
+		case USB_TEST_K:
+		case USB_TEST_SE0_NAK:
+		case USB_TEST_PACKET:
+			/*
+			 * The USBHS controller automatically handles the
+			 * Set_Feature(testmode) request. Standard test modes
+			 * that use values of test mode selector from
+			 * 01h to 04h (Test_J, Test_K, Test_SE0_NAK,
+			 * Test_Packet) are supported by the
+			 * controller(HS - ack, FS - stall).
+			 */
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int cdns2_ep0_handle_feature_intf(struct cdns2_device *pdev,
+					 struct usb_ctrlrequest *ctrl,
+					 int set)
+{
+	int ret = 0;
+	u32 wValue;
+
+	wValue = le16_to_cpu(ctrl->wValue);
+
+	switch (wValue) {
+	case USB_INTRF_FUNC_SUSPEND:
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int cdns2_ep0_handle_feature_endpoint(struct cdns2_device *pdev,
+					     struct usb_ctrlrequest *ctrl,
+					     int set)
+{
+	struct cdns2_endpoint *pep;
+	u8 wValue;
+
+	wValue = le16_to_cpu(ctrl->wValue);
+	pep = &pdev->eps[cdns2_w_index_to_ep_index(le16_to_cpu(ctrl->wIndex))];
+
+	if (wValue != USB_ENDPOINT_HALT)
+		return -EINVAL;
+
+	if (!(le16_to_cpu(ctrl->wIndex) & ~USB_DIR_IN))
+		return 0;
+
+	switch (wValue) {
+	case USB_ENDPOINT_HALT:
+		if (set || !(pep->ep_state & EP_WEDGE))
+			return cdns2_halt_endpoint(pdev, pep, set);
+		break;
+	default:
+		dev_warn(pdev->dev, "WARN Incorrect wValue %04x\n", wValue);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int cdns2_req_ep0_handle_feature(struct cdns2_device *pdev,
+					struct usb_ctrlrequest *ctrl,
+					int set)
+{
+	switch (ctrl->bRequestType & USB_RECIP_MASK) {
+	case USB_RECIP_DEVICE:
+		return cdns2_ep0_handle_feature_device(pdev, ctrl, set);
+	case USB_RECIP_INTERFACE:
+		return cdns2_ep0_handle_feature_intf(pdev, ctrl, set);
+	case USB_RECIP_ENDPOINT:
+		return cdns2_ep0_handle_feature_endpoint(pdev, ctrl, set);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int cdns2_ep0_std_request(struct cdns2_device *pdev)
+{
+	struct usb_ctrlrequest *ctrl = &pdev->setup;
+	int ret;
+
+	switch (ctrl->bRequest) {
+	case USB_REQ_SET_ADDRESS:
+		ret = cdns2_req_ep0_set_address(pdev,
+						le16_to_cpu(ctrl->wValue));
+		break;
+	case USB_REQ_SET_CONFIGURATION:
+		ret = cdns2_req_ep0_set_configuration(pdev, ctrl);
+		break;
+	case USB_REQ_GET_STATUS:
+		ret = cdns2_req_ep0_handle_status(pdev, ctrl);
+		break;
+	case USB_REQ_CLEAR_FEATURE:
+		ret = cdns2_req_ep0_handle_feature(pdev, ctrl, 0);
+		break;
+	case USB_REQ_SET_FEATURE:
+		ret = cdns2_req_ep0_handle_feature(pdev, ctrl, 1);
+		break;
+	default:
+		ret = cdns2_ep0_delegate_req(pdev);
+		break;
+	}
+
+	return ret;
+}
+
+static void __pending_setup_status_handler(struct cdns2_device *pdev)
+{
+	struct usb_request *request = pdev->pending_status_request;
+
+	if (pdev->status_completion_no_call && request && request->complete) {
+		request->complete(&pdev->eps[0].endpoint, request);
+		pdev->status_completion_no_call = 0;
+	}
+}
+
+void cdns2_pending_setup_status_handler(struct work_struct *work)
+{
+	struct cdns2_device *pdev = container_of(work, struct cdns2_device,
+						 pending_status_wq);
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdev->lock, flags);
+	__pending_setup_status_handler(pdev);
+	spin_unlock_irqrestore(&pdev->lock, flags);
+}
+
+void cdns2_handle_setup_packet(struct cdns2_device *pdev)
+{
+	struct usb_ctrlrequest *ctrl = &pdev->setup;
+	struct cdns2_endpoint *pep = &pdev->eps[0];
+	struct cdns2_request *preq;
+	int ret = 0;
+	u16 len;
+	u8 reg;
+	int i;
+
+	writeb(EP0CS_CHGSET, &pdev->ep0_regs->cs);
+
+	for (i = 0; i < 8; i++)
+		((u8 *)&pdev->setup)[i] = readb(&pdev->ep0_regs->setupdat[i]);
+
+	/*
+	 * If SETUP packet was modified while reading just simple ignore it.
+	 * The new one will be handled latter.
+	 */
+	if (cdns2_check_new_setup(pdev)) {
+		trace_cdns2_ep0_setup("overridden");
+		return;
+	}
+
+	trace_cdns2_ctrl_req(ctrl);
+
+	if (!pdev->gadget_driver)
+		goto out;
+
+	if (pdev->gadget.state == USB_STATE_NOTATTACHED) {
+		dev_err(pdev->dev, "ERR: Setup detected in unattached state\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	pep = &pdev->eps[0];
+
+	/* Halt for Ep0 is cleared automatically when SETUP packet arrives. */
+	pep->ep_state &= ~EP_STALLED;
+
+	if (!list_empty(&pep->pending_list)) {
+		preq = cdns2_next_preq(&pep->pending_list);
+		cdns2_gadget_giveback(pep, preq, -ECONNRESET);
+	}
+
+	len = le16_to_cpu(ctrl->wLength);
+	if (len)
+		pdev->ep0_stage = CDNS2_DATA_STAGE;
+	else
+		pdev->ep0_stage = CDNS2_STATUS_STAGE;
+
+	pep->dir = ctrl->bRequestType & USB_DIR_IN;
+
+	/*
+	 * SET_ADDRESS request is acknowledged automatically by controller and
+	 * in the worse case driver may not notice this request. To check
+	 * whether this request has been processed driver can use
+	 * fnaddr register.
+	 */
+	reg = readb(&pdev->usb_regs->fnaddr);
+	if (pdev->setup.bRequest != USB_REQ_SET_ADDRESS &&
+	    pdev->dev_address != reg)
+		cdns2_req_ep0_set_address(pdev, reg);
+
+	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
+		ret = cdns2_ep0_std_request(pdev);
+	else
+		ret = cdns2_ep0_delegate_req(pdev);
+
+	if (ret == USB_GADGET_DELAYED_STATUS) {
+		trace_cdns2_ep0_status_stage("delayed");
+		return;
+	}
+
+out:
+	if (ret < 0)
+		cdns2_ep0_stall(pdev);
+	else if (pdev->ep0_stage == CDNS2_STATUS_STAGE)
+		cdns2_status_stage(pdev);
+}
+
+static void cdns2_transfer_completed(struct cdns2_device *pdev)
+{
+	struct cdns2_endpoint *pep = &pdev->eps[0];
+
+	if (!list_empty(&pep->pending_list)) {
+		struct cdns2_request *preq;
+
+		trace_cdns2_complete_trb(pep, pep->ring.trbs);
+		preq = cdns2_next_preq(&pep->pending_list);
+
+		preq->request.actual =
+			TRB_LEN(le32_to_cpu(pep->ring.trbs->length));
+		cdns2_gadget_giveback(pep, preq, 0);
+	}
+
+	cdns2_status_stage(pdev);
+}
+
+void cdns2_handle_ep0_interrupt(struct cdns2_device *pdev, int dir)
+{
+	u32 ep_sts_reg;
+
+	cdns2_select_ep(pdev, dir);
+
+	trace_cdns2_ep0_irq(pdev);
+
+	ep_sts_reg = readl(&pdev->adma_regs->ep_sts);
+	writel(ep_sts_reg, &pdev->adma_regs->ep_sts);
+
+	__pending_setup_status_handler(pdev);
+
+	if ((ep_sts_reg & DMA_EP_STS_IOC) || (ep_sts_reg & DMA_EP_STS_ISP)) {
+		pdev->eps[0].dir = dir;
+		cdns2_transfer_completed(pdev);
+	}
+}
+
+/*
+ * Function shouldn't be called by gadget driver,
+ * endpoint 0 is allways active.
+ */
+static int cdns2_gadget_ep0_enable(struct usb_ep *ep,
+				   const struct usb_endpoint_descriptor *desc)
+{
+	return -EINVAL;
+}
+
+/*
+ * Function shouldn't be called by gadget driver,
+ * endpoint 0 is allways active.
+ */
+static int cdns2_gadget_ep0_disable(struct usb_ep *ep)
+{
+	return -EINVAL;
+}
+
+static int cdns2_gadget_ep0_set_halt(struct usb_ep *ep, int value)
+{
+	struct cdns2_endpoint *pep = ep_to_cdns2_ep(ep);
+	struct cdns2_device *pdev = pep->pdev;
+	unsigned long flags;
+
+	if (!value)
+		return 0;
+
+	spin_lock_irqsave(&pdev->lock, flags);
+	cdns2_ep0_stall(pdev);
+	spin_unlock_irqrestore(&pdev->lock, flags);
+
+	return 0;
+}
+
+static int cdns2_gadget_ep0_set_wedge(struct usb_ep *ep)
+{
+	return cdns2_gadget_ep0_set_halt(ep, 1);
+}
+
+static int cdns2_gadget_ep0_queue(struct usb_ep *ep,
+				  struct usb_request *request,
+				  gfp_t gfp_flags)
+{
+	struct cdns2_endpoint *pep = ep_to_cdns2_ep(ep);
+	struct cdns2_device *pdev = pep->pdev;
+	struct cdns2_request *preq;
+	unsigned long flags;
+	u8 zlp = 0;
+	int ret;
+
+	spin_lock_irqsave(&pdev->lock, flags);
+
+	preq = to_cdns2_request(request);
+
+	trace_cdns2_request_enqueue(preq);
+
+	/* Cancel the request if controller receive new SETUP packet. */
+	if (cdns2_check_new_setup(pdev)) {
+		trace_cdns2_ep0_setup("overridden");
+		spin_unlock_irqrestore(&pdev->lock, flags);
+		return -ECONNRESET;
+	}
+
+	/* Send STATUS stage. Should be called only for SET_CONFIGURATION. */
+	if (pdev->ep0_stage == CDNS2_STATUS_STAGE) {
+		cdns2_status_stage(pdev);
+
+		request->actual = 0;
+		pdev->status_completion_no_call = true;
+		pdev->pending_status_request = request;
+		usb_gadget_set_state(&pdev->gadget, USB_STATE_CONFIGURED);
+		spin_unlock_irqrestore(&pdev->lock, flags);
+
+		/*
+		 * Since there is no completion interrupt for status stage,
+		 * it needs to call ->completion in software after
+		 * cdns2_gadget_ep0_queue is back.
+		 */
+		queue_work(system_freezable_wq, &pdev->pending_status_wq);
+		return 0;
+	}
+
+	if (!list_empty(&pep->pending_list)) {
+		trace_cdns2_ep0_setup("pending");
+		dev_err(pdev->dev,
+			"can't handle multiple requests for ep0\n");
+		spin_unlock_irqrestore(&pdev->lock, flags);
+		return -EBUSY;
+	}
+
+	ret = usb_gadget_map_request_by_dev(pdev->dev, request, pep->dir);
+	if (ret) {
+		spin_unlock_irqrestore(&pdev->lock, flags);
+		dev_err(pdev->dev, "failed to map request\n");
+		return -EINVAL;
+	}
+
+	request->status = -EINPROGRESS;
+	list_add_tail(&preq->list, &pep->pending_list);
+
+	if (request->zero && request->length &&
+	    (request->length % ep->maxpacket == 0))
+		zlp = 1;
+
+	cdns2_ep0_enqueue(pdev, request->dma, request->length, zlp);
+
+	spin_unlock_irqrestore(&pdev->lock, flags);
+
+	return 0;
+}
+
+static const struct usb_ep_ops cdns2_gadget_ep0_ops = {
+	.enable = cdns2_gadget_ep0_enable,
+	.disable = cdns2_gadget_ep0_disable,
+	.alloc_request = cdns2_gadget_ep_alloc_request,
+	.free_request = cdns2_gadget_ep_free_request,
+	.queue = cdns2_gadget_ep0_queue,
+	.dequeue = cdns2_gadget_ep_dequeue,
+	.set_halt = cdns2_gadget_ep0_set_halt,
+	.set_wedge = cdns2_gadget_ep0_set_wedge,
+};
+
+void cdns2_ep0_config(struct cdns2_device *pdev)
+{
+	struct cdns2_endpoint *pep;
+
+	pep = &pdev->eps[0];
+
+	if (!list_empty(&pep->pending_list)) {
+		struct cdns2_request *preq;
+
+		preq = cdns2_next_preq(&pep->pending_list);
+		list_del_init(&preq->list);
+	}
+
+	writeb(EP0_FIFO_AUTO, &pdev->ep0_regs->fifo);
+	cdns2_select_ep(pdev, USB_DIR_OUT);
+	writel(DMA_EP_CFG_ENABLE, &pdev->adma_regs->ep_cfg);
+
+	writeb(EP0_FIFO_IO_TX | EP0_FIFO_AUTO, &pdev->ep0_regs->fifo);
+	cdns2_select_ep(pdev, USB_DIR_IN);
+	writel(DMA_EP_CFG_ENABLE, &pdev->adma_regs->ep_cfg);
+
+	writeb(pdev->gadget.ep0->maxpacket, &pdev->ep0_regs->maxpack);
+	writel(DMA_EP_IEN_EP_OUT0 | DMA_EP_IEN_EP_IN0,
+	       &pdev->adma_regs->ep_ien);
+}
+
+void cdns2_init_ep0(struct cdns2_device *pdev,
+		    struct cdns2_endpoint *pep)
+{
+	u16 maxpacket = le16_to_cpu(cdns2_gadget_ep0_desc.wMaxPacketSize);
+
+	usb_ep_set_maxpacket_limit(&pep->endpoint, maxpacket);
+
+	pep->endpoint.ops = &cdns2_gadget_ep0_ops;
+	pep->endpoint.desc = &cdns2_gadget_ep0_desc;
+	pep->endpoint.caps.type_control = true;
+	pep->endpoint.caps.dir_in = true;
+	pep->endpoint.caps.dir_out = true;
+
+	pdev->gadget.ep0 = &pep->endpoint;
+}

linux-7.2.3/drivers/usb/gadget/udc/cdns2/cdns2-gadget.h

@@ -0,0 +1,716 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * USBHS-DEV device controller driver header file
+ *
+ * Copyright (C) 2023 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#ifndef __LINUX_CDNS2_GADGET
+#define __LINUX_CDNS2_GADGET
+
+#include <linux/usb/gadget.h>
+#include <linux/dma-direction.h>
+
+/*
+ * USBHS register interface.
+ * This corresponds to the USBHS Device Controller Interface.
+ */
+
+/**
+ * struct cdns2_ep0_regs - endpoint 0 related registers.
+ * @rxbc: receive (OUT) 0 endpoint byte count register.
+ * @txbc: transmit (IN) 0 endpoint byte count register.
+ * @cs: 0 endpoint control and status register.
+ * @reserved1: reserved.
+ * @fifo: 0 endpoint fifo register.
+ * @reserved2: reserved.
+ * @setupdat: SETUP data register.
+ * @reserved4: reserved.
+ * @maxpack: 0 endpoint max packet size.
+ */
+struct cdns2_ep0_regs {
+	__u8 rxbc;
+	__u8 txbc;
+	__u8 cs;
+	__u8 reserved1[4];
+	__u8 fifo;
+	__le32 reserved2[94];
+	__u8 setupdat[8];
+	__u8 reserved4[88];
+	__u8 maxpack;
+} __packed __aligned(4);
+
+/* EP0CS - bitmasks. */
+/* Endpoint 0 stall bit for status stage. */
+#define EP0CS_STALL	BIT(0)
+/* HSNAK bit. */
+#define EP0CS_HSNAK	BIT(1)
+/* IN 0 endpoint busy bit. */
+#define EP0CS_TXBSY_MSK	BIT(2)
+/* OUT 0 endpoint busy bit. */
+#define EP0CS_RXBSY_MSK	BIT(3)
+/* Send STALL in the data stage phase. */
+#define EP0CS_DSTALL	BIT(4)
+/* SETUP buffer content was changed. */
+#define EP0CS_CHGSET	BIT(7)
+
+/* EP0FIFO - bitmasks. */
+/* Direction. */
+#define EP0_FIFO_IO_TX	BIT(4)
+/* FIFO auto bit. */
+#define EP0_FIFO_AUTO	BIT(5)
+/* FIFO commit bit. */
+#define EP0_FIFO_COMMIT	BIT(6)
+/* FIFO access bit. */
+#define EP0_FIFO_ACCES	BIT(7)
+
+/**
+ * struct cdns2_epx_base - base endpoint registers.
+ * @rxbc: OUT endpoint byte count register.
+ * @rxcon: OUT endpoint control register.
+ * @rxcs: OUT endpoint control and status register.
+ * @txbc: IN endpoint byte count register.
+ * @txcon: IN endpoint control register.
+ * @txcs: IN endpoint control and status register.
+ */
+struct cdns2_epx_base {
+	__le16 rxbc;
+	__u8 rxcon;
+	__u8 rxcs;
+	__le16 txbc;
+	__u8 txcon;
+	__u8 txcs;
+} __packed __aligned(4);
+
+/* rxcon/txcon - endpoint control register bitmasks. */
+/* Endpoint buffering: 0 - single buffering ... 3 - quad buffering. */
+#define EPX_CON_BUF		GENMASK(1, 0)
+/* Endpoint type. */
+#define EPX_CON_TYPE		GENMASK(3, 2)
+/* Endpoint type: isochronous. */
+#define EPX_CON_TYPE_ISOC	0x4
+/* Endpoint type: bulk. */
+#define EPX_CON_TYPE_BULK	0x8
+/* Endpoint type: interrupt. */
+#define EPX_CON_TYPE_INT	0xC
+/* Number of packets per microframe. */
+#define EPX_CON_ISOD		GENMASK(5, 4)
+#define EPX_CON_ISOD_SHIFT	0x4
+/* Endpoint stall bit. */
+#define EPX_CON_STALL		BIT(6)
+/* Endpoint enable bit.*/
+#define EPX_CON_VAL		BIT(7)
+
+/* rxcs/txcs - endpoint control and status bitmasks. */
+/* Data sequence error for the ISO endpoint. */
+#define EPX_CS_ERR(p)		((p) & BIT(0))
+
+/**
+ * struct cdns2_epx_regs - endpoint 1..15 related registers.
+ * @reserved: reserved.
+ * @ep: none control endpoints array.
+ * @reserved2: reserved.
+ * @endprst: endpoint reset register.
+ * @reserved3: reserved.
+ * @isoautoarm: ISO auto-arm register.
+ * @reserved4: reserved.
+ * @isodctrl: ISO control register.
+ * @reserved5: reserved.
+ * @isoautodump: ISO auto dump enable register.
+ * @reserved6: reserved.
+ * @rxmaxpack: receive (OUT) Max packet size register.
+ * @reserved7: reserved.
+ * @rxstaddr: receive (OUT) start address endpoint buffer register.
+ * @reserved8: reserved.
+ * @txstaddr: transmit (IN) start address endpoint buffer register.
+ * @reserved9: reserved.
+ * @txmaxpack: transmit (IN) Max packet size register.
+ */
+struct cdns2_epx_regs {
+	__le32 reserved[2];
+	struct cdns2_epx_base ep[15];
+	__u8 reserved2[290];
+	__u8 endprst;
+	__u8 reserved3[41];
+	__le16 isoautoarm;
+	__u8 reserved4[10];
+	__le16 isodctrl;
+	__le16 reserved5;
+	__le16 isoautodump;
+	__le32 reserved6;
+	__le16 rxmaxpack[15];
+	__le32 reserved7[65];
+	__le32 rxstaddr[15];
+	__u8 reserved8[4];
+	__le32 txstaddr[15];
+	__u8 reserved9[98];
+	__le16 txmaxpack[15];
+} __packed __aligned(4);
+
+/* ENDPRST - bitmasks. */
+/* Endpoint number. */
+#define ENDPRST_EP	GENMASK(3, 0)
+/* IN direction bit. */
+#define ENDPRST_IO_TX	BIT(4)
+/* Toggle reset bit. */
+#define ENDPRST_TOGRST	BIT(5)
+/* FIFO reset bit. */
+#define ENDPRST_FIFORST	BIT(6)
+/* Toggle status and reset bit. */
+#define ENDPRST_TOGSETQ	BIT(7)
+
+/**
+ * struct cdns2_interrupt_regs - USB interrupt related registers.
+ * @reserved: reserved.
+ * @usbirq: USB interrupt request register.
+ * @extirq: external interrupt request register.
+ * @rxpngirq: external interrupt request register.
+ * @reserved1: reserved.
+ * @usbien: USB interrupt enable register.
+ * @extien: external interrupt enable register.
+ * @reserved2: reserved.
+ * @usbivect: USB interrupt vector register.
+ */
+struct cdns2_interrupt_regs {
+	__u8 reserved[396];
+	__u8 usbirq;
+	__u8 extirq;
+	__le16 rxpngirq;
+	__le16 reserved1[4];
+	__u8 usbien;
+	__u8 extien;
+	__le16 reserved2[3];
+	__u8 usbivect;
+} __packed __aligned(4);
+
+/* EXTIRQ and EXTIEN - bitmasks. */
+/* VBUS fault fall interrupt. */
+#define EXTIRQ_VBUSFAULT_FALL BIT(0)
+/* VBUS fault fall interrupt. */
+#define EXTIRQ_VBUSFAULT_RISE BIT(1)
+/* Wake up interrupt bit. */
+#define EXTIRQ_WAKEUP	BIT(7)
+
+/* USBIEN and USBIRQ - bitmasks. */
+/* SETUP data valid interrupt bit.*/
+#define USBIRQ_SUDAV	BIT(0)
+/* Start-of-frame interrupt bit. */
+#define USBIRQ_SOF	BIT(1)
+/* SETUP token interrupt bit. */
+#define USBIRQ_SUTOK	BIT(2)
+/* USB suspend interrupt bit. */
+#define USBIRQ_SUSPEND	BIT(3)
+/* USB reset interrupt bit. */
+#define USBIRQ_URESET	BIT(4)
+/* USB high-speed mode interrupt bit. */
+#define USBIRQ_HSPEED	BIT(5)
+/* Link Power Management interrupt bit. */
+#define USBIRQ_LPM	BIT(7)
+
+#define USB_IEN_INIT (USBIRQ_SUDAV | USBIRQ_SUSPEND | USBIRQ_URESET \
+		      | USBIRQ_HSPEED | USBIRQ_LPM)
+/**
+ * struct cdns2_usb_regs - USB controller registers.
+ * @reserved: reserved.
+ * @lpmctrl: LPM control register.
+ * @lpmclock: LPM clock register.
+ * @reserved2: reserved.
+ * @endprst: endpoint reset register.
+ * @usbcs: USB control and status register.
+ * @frmnr: USB frame counter register.
+ * @fnaddr: function Address register.
+ * @clkgate: clock gate register.
+ * @fifoctrl: FIFO control register.
+ * @speedctrl: speed Control register.
+ * @sleep_clkgate: sleep Clock Gate register.
+ * @reserved3: reserved.
+ * @cpuctrl: microprocessor control register.
+ */
+struct cdns2_usb_regs {
+	__u8 reserved[4];
+	__u16 lpmctrl;
+	__u8 lpmclock;
+	__u8 reserved2[411];
+	__u8 endprst;
+	__u8 usbcs;
+	__le16 frmnr;
+	__u8 fnaddr;
+	__u8 clkgate;
+	__u8 fifoctrl;
+	__u8 speedctrl;
+	__u8 sleep_clkgate;
+	__u8 reserved3[533];
+	__u8 cpuctrl;
+} __packed __aligned(4);
+
+/* LPMCTRL - bitmasks. */
+/* BESL (Best Effort Service Latency). */
+#define LPMCTRLLL_HIRD		GENMASK(7, 4)
+/* Last received Remote Wakeup field from LPM Extended Token packet. */
+#define LPMCTRLLH_BREMOTEWAKEUP	BIT(8)
+/* Reflects value of the lpmnyet bit located in the usbcs[1] register. */
+#define LPMCTRLLH_LPMNYET	BIT(16)
+
+/* LPMCLOCK - bitmasks. */
+/*
+ * If bit is 1 the controller automatically turns off clock
+ * (utmisleepm goes to low), else the microprocessor should use
+ * sleep clock gate register to turn off clock.
+ */
+#define LPMCLOCK_SLEEP_ENTRY	BIT(7)
+
+/* USBCS - bitmasks. */
+/* Send NYET handshake for the LPM transaction. */
+#define USBCS_LPMNYET		BIT(2)
+/* Remote wake-up bit. */
+#define USBCS_SIGRSUME		BIT(5)
+/* Software disconnect bit. */
+#define USBCS_DISCON		BIT(6)
+/* Indicates that a wakeup pin resumed the controller. */
+#define USBCS_WAKESRC		BIT(7)
+
+/* FIFOCTRL - bitmasks. */
+/* Endpoint number. */
+#define FIFOCTRL_EP		GENMASK(3, 0)
+/* Direction bit. */
+#define FIFOCTRL_IO_TX		BIT(4)
+/* FIFO auto bit. */
+#define FIFOCTRL_FIFOAUTO	BIT(5)
+/* FIFO commit bit. */
+#define FIFOCTRL_FIFOCMIT	BIT(6)
+/* FIFO access bit. */
+#define FIFOCTRL_FIFOACC	BIT(7)
+
+/* SPEEDCTRL - bitmasks. */
+/* Device works in Full Speed. */
+#define SPEEDCTRL_FS		BIT(1)
+/* Device works in High Speed. */
+#define SPEEDCTRL_HS		BIT(2)
+/* Force FS mode. */
+#define SPEEDCTRL_HSDISABLE	BIT(7)
+
+/* CPUCTRL- bitmasks. */
+/* UP clock enable */
+#define CPUCTRL_UPCLK		BIT(0)
+/* Controller reset bit. */
+#define CPUCTRL_SW_RST		BIT(1)
+/**
+ * If the wuen bit is ‘1’, the upclken is automatically set to ‘1’ after
+ * detecting rising edge of wuintereq interrupt. If the wuen bit is ‘0’,
+ * the wuintereq interrupt is ignored.
+ */
+#define CPUCTRL_WUEN		BIT(7)
+
+
+/**
+ * struct cdns2_adma_regs - ADMA controller registers.
+ * @conf: DMA global configuration register.
+ * @sts: DMA global Status register.
+ * @reserved1: reserved.
+ * @ep_sel: DMA endpoint select register.
+ * @ep_traddr: DMA endpoint transfer ring address register.
+ * @ep_cfg: DMA endpoint configuration register.
+ * @ep_cmd: DMA endpoint command register.
+ * @ep_sts: DMA endpoint status register.
+ * @reserved2: reserved.
+ * @ep_sts_en: DMA endpoint status enable register.
+ * @drbl: DMA doorbell register.
+ * @ep_ien: DMA endpoint interrupt enable register.
+ * @ep_ists: DMA endpoint interrupt status register.
+ * @axim_ctrl: AXI Master Control register.
+ * @axim_id: AXI Master ID register.
+ * @reserved3: reserved.
+ * @axim_cap: AXI Master Wrapper Extended Capability.
+ * @reserved4: reserved.
+ * @axim_ctrl0: AXI Master Wrapper Extended Capability Control Register 0.
+ * @axim_ctrl1: AXI Master Wrapper Extended Capability Control Register 1.
+ */
+struct cdns2_adma_regs {
+	__le32 conf;
+	__le32 sts;
+	__le32 reserved1[5];
+	__le32 ep_sel;
+	__le32 ep_traddr;
+	__le32 ep_cfg;
+	__le32 ep_cmd;
+	__le32 ep_sts;
+	__le32 reserved2;
+	__le32 ep_sts_en;
+	__le32 drbl;
+	__le32 ep_ien;
+	__le32 ep_ists;
+	__le32 axim_ctrl;
+	__le32 axim_id;
+	__le32 reserved3;
+	__le32 axim_cap;
+	__le32 reserved4;
+	__le32 axim_ctrl0;
+	__le32 axim_ctrl1;
+};
+
+#define CDNS2_ADMA_REGS_OFFSET	0x400
+
+/* DMA_CONF - bitmasks. */
+/* Reset USB device configuration. */
+#define DMA_CONF_CFGRST		BIT(0)
+/* Singular DMA transfer mode.*/
+#define DMA_CONF_DSING		BIT(8)
+/* Multiple DMA transfers mode.*/
+#define DMA_CONF_DMULT		BIT(9)
+
+/* DMA_EP_CFG - bitmasks. */
+/* Endpoint enable. */
+#define DMA_EP_CFG_ENABLE	BIT(0)
+
+/* DMA_EP_CMD - bitmasks. */
+/* Endpoint reset. */
+#define DMA_EP_CMD_EPRST	BIT(0)
+/* Transfer descriptor ready. */
+#define DMA_EP_CMD_DRDY		BIT(6)
+/* Data flush. */
+#define DMA_EP_CMD_DFLUSH	BIT(7)
+
+/* DMA_EP_STS - bitmasks. */
+/* Interrupt On Complete. */
+#define DMA_EP_STS_IOC		BIT(2)
+/* Interrupt on Short Packet. */
+#define DMA_EP_STS_ISP		BIT(3)
+/* Transfer descriptor missing. */
+#define DMA_EP_STS_DESCMIS	BIT(4)
+/* TRB error. */
+#define DMA_EP_STS_TRBERR	BIT(7)
+/* DMA busy bit. */
+#define DMA_EP_STS_DBUSY	BIT(9)
+/* Current Cycle Status. */
+#define DMA_EP_STS_CCS(p)	((p) & BIT(11))
+/* OUT size mismatch. */
+#define DMA_EP_STS_OUTSMM	BIT(14)
+/* ISO transmission error. */
+#define DMA_EP_STS_ISOERR	BIT(15)
+
+/* DMA_EP_STS_EN - bitmasks. */
+/* OUT transfer missing descriptor enable. */
+#define DMA_EP_STS_EN_DESCMISEN	BIT(4)
+/* TRB enable. */
+#define DMA_EP_STS_EN_TRBERREN	BIT(7)
+/* OUT size mismatch enable. */
+#define DMA_EP_STS_EN_OUTSMMEN	BIT(14)
+/* ISO transmission error enable. */
+#define DMA_EP_STS_EN_ISOERREN	BIT(15)
+
+/* DMA_EP_IEN - bitmasks. */
+#define DMA_EP_IEN(index)	(1 << (index))
+#define DMA_EP_IEN_EP_OUT0	BIT(0)
+#define DMA_EP_IEN_EP_IN0	BIT(16)
+
+/* DMA_EP_ISTS - bitmasks. */
+#define DMA_EP_ISTS(index)	(1 << (index))
+#define DMA_EP_ISTS_EP_OUT0	BIT(0)
+#define DMA_EP_ISTS_EP_IN0	BIT(16)
+
+#define gadget_to_cdns2_device(g) (container_of(g, struct cdns2_device, gadget))
+#define ep_to_cdns2_ep(ep) (container_of(ep, struct cdns2_endpoint, endpoint))
+
+/*-------------------------------------------------------------------------*/
+#define TRBS_PER_SEGMENT	600
+#define ISO_MAX_INTERVAL	8
+#define MAX_TRB_LENGTH		BIT(16)
+#define MAX_ISO_SIZE		3076
+/*
+ * To improve performance the TRB buffer pointers can't cross
+ * 4KB boundaries.
+ */
+#define TRB_MAX_ISO_BUFF_SHIFT	12
+#define TRB_MAX_ISO_BUFF_SIZE	BIT(TRB_MAX_ISO_BUFF_SHIFT)
+/* How much data is left before the 4KB boundary? */
+#define TRB_BUFF_LEN_UP_TO_BOUNDARY(addr) (TRB_MAX_ISO_BUFF_SIZE - \
+					((addr) & (TRB_MAX_ISO_BUFF_SIZE - 1)))
+
+#if TRBS_PER_SEGMENT < 2
+#error "Incorrect TRBS_PER_SEGMENT. Minimal Transfer Ring size is 2."
+#endif
+
+/**
+ * struct cdns2_trb - represent Transfer Descriptor block.
+ * @buffer: pointer to buffer data.
+ * @length: length of data.
+ * @control: control flags.
+ *
+ * This structure describes transfer block handled by DMA module.
+ */
+struct cdns2_trb {
+	__le32 buffer;
+	__le32 length;
+	__le32 control;
+};
+
+#define TRB_SIZE		(sizeof(struct cdns2_trb))
+/*
+ * These two extra TRBs are reserved for isochronous transfer
+ * to inject 0 length packet and extra LINK TRB to synchronize the ISO transfer.
+ */
+#define TRB_ISO_RESERVED	2
+#define TR_SEG_SIZE		(TRB_SIZE * (TRBS_PER_SEGMENT + TRB_ISO_RESERVED))
+
+/* TRB bit mask. */
+#define TRB_TYPE_BITMASK	GENMASK(15, 10)
+#define TRB_TYPE(p)		((p) << 10)
+#define TRB_FIELD_TO_TYPE(p)	(((p) & TRB_TYPE_BITMASK) >> 10)
+
+/* TRB type IDs. */
+/* Used for Bulk, Interrupt, ISOC, and control data stage. */
+#define TRB_NORMAL		1
+/* TRB for linking ring segments. */
+#define TRB_LINK		6
+
+/* Cycle bit - indicates TRB ownership by driver or hw. */
+#define TRB_CYCLE		BIT(0)
+/*
+ * When set to '1', the device will toggle its interpretation of the Cycle bit.
+ */
+#define TRB_TOGGLE		BIT(1)
+/* Interrupt on short packet. */
+#define TRB_ISP			BIT(2)
+/* Chain bit associate this TRB with next one TRB. */
+#define TRB_CHAIN		BIT(4)
+/* Interrupt on completion. */
+#define TRB_IOC			BIT(5)
+
+/* Transfer_len bitmasks. */
+#define TRB_LEN(p)		((p) & GENMASK(16, 0))
+#define TRB_BURST(p)		(((p) << 24) & GENMASK(31, 24))
+#define TRB_FIELD_TO_BURST(p)	(((p) & GENMASK(31, 24)) >> 24)
+
+/* Data buffer pointer bitmasks. */
+#define TRB_BUFFER(p)		((p) & GENMASK(31, 0))
+
+/*-------------------------------------------------------------------------*/
+/* Driver numeric constants. */
+
+/* Maximum address that can be assigned to device. */
+#define USB_DEVICE_MAX_ADDRESS	127
+
+/* One control and 15 IN and 15 OUT endpoints. */
+#define CDNS2_ENDPOINTS_NUM	31
+
+#define CDNS2_EP_ZLP_BUF_SIZE	512
+
+/*-------------------------------------------------------------------------*/
+/* Used structures. */
+
+struct cdns2_device;
+
+/**
+ * struct cdns2_ring - transfer ring representation.
+ * @trbs: pointer to transfer ring.
+ * @dma: dma address of transfer ring.
+ * @free_trbs: number of free TRBs in transfer ring.
+ * @pcs: producer cycle state.
+ * @ccs: consumer cycle state.
+ * @enqueue: enqueue index in transfer ring.
+ * @dequeue: dequeue index in transfer ring.
+ */
+struct cdns2_ring {
+	struct cdns2_trb *trbs;
+	dma_addr_t dma;
+	int free_trbs;
+	u8 pcs;
+	u8 ccs;
+	int enqueue;
+	int dequeue;
+};
+
+/**
+ * struct cdns2_endpoint - extended device side representation of USB endpoint.
+ * @endpoint: usb endpoint.
+ * @pending_list: list of requests queuing on transfer ring.
+ * @deferred_list: list of requests waiting for queuing on transfer ring.
+ * @pdev: device associated with endpoint.
+ * @name: a human readable name e.g. ep1out.
+ * @ring: transfer ring associated with endpoint.
+ * @ep_state: state of endpoint.
+ * @idx: index of endpoint in pdev->eps table.
+ * @dir: endpoint direction.
+ * @num: endpoint number (1 - 15).
+ * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK.
+ * @interval: interval between packets used for ISOC and Interrupt endpoint.
+ * @buffering: on-chip buffers assigned to endpoint.
+ * @trb_burst_size: number of burst used in TRB.
+ * @skip: Sometimes the controller cannot process isochronous endpoint ring
+ *        quickly enough and it will miss some isoc tds on the ring and
+ *        generate ISO transmition error.
+ *        Driver sets skip flag when receive a ISO transmition error and
+ *        process the missed TDs on the endpoint ring.
+ * @wa1_set: use WA1.
+ * @wa1_trb: TRB assigned to WA1.
+ * @wa1_trb_index: TRB index for WA1.
+ * @wa1_cycle_bit: correct cycle bit for WA1.
+ */
+struct cdns2_endpoint {
+	struct usb_ep endpoint;
+	struct list_head pending_list;
+	struct list_head deferred_list;
+
+	struct cdns2_device	*pdev;
+	char name[20];
+
+	struct cdns2_ring ring;
+
+#define EP_ENABLED		BIT(0)
+#define EP_STALLED		BIT(1)
+#define EP_STALL_PENDING	BIT(2)
+#define EP_WEDGE		BIT(3)
+#define	EP_CLAIMED		BIT(4)
+#define EP_RING_FULL		BIT(5)
+#define EP_DEFERRED_DRDY	BIT(6)
+
+	u32 ep_state;
+
+	u8 idx;
+	u8 dir;
+	u8 num;
+	u8 type;
+	int interval;
+	u8 buffering;
+	u8 trb_burst_size;
+	bool skip;
+
+	unsigned int wa1_set:1;
+	struct cdns2_trb *wa1_trb;
+	unsigned int wa1_trb_index;
+	unsigned int wa1_cycle_bit:1;
+};
+
+/**
+ * struct cdns2_request - extended device side representation of usb_request
+ *                        object.
+ * @request: generic usb_request object describing single I/O request.
+ * @pep: extended representation of usb_ep object.
+ * @trb: the first TRB association with this request.
+ * @start_trb: number of the first TRB in transfer ring.
+ * @end_trb: number of the last TRB in transfer ring.
+ * @list: used for queuing request in lists.
+ * @finished_trb: number of trb has already finished per request.
+ * @num_of_trb: how many trbs are associated with request.
+ */
+struct cdns2_request {
+	struct usb_request request;
+	struct cdns2_endpoint *pep;
+	struct cdns2_trb *trb;
+	int start_trb;
+	int end_trb;
+	struct list_head list;
+	int finished_trb;
+	int num_of_trb;
+};
+
+#define to_cdns2_request(r) (container_of(r, struct cdns2_request, request))
+
+/* Stages used during enumeration process.*/
+#define CDNS2_SETUP_STAGE		0x0
+#define CDNS2_DATA_STAGE		0x1
+#define CDNS2_STATUS_STAGE		0x2
+
+/**
+ * struct cdns2_device - represent USB device.
+ * @dev: pointer to device structure associated whit this controller.
+ * @gadget: device side representation of the peripheral controller.
+ * @gadget_driver: pointer to the gadget driver.
+ * @lock: for synchronizing.
+ * @irq: interrupt line number.
+ * @regs: base address for registers
+ * @usb_regs: base address for common USB registers.
+ * @ep0_regs: base address for endpoint 0 related registers.
+ * @epx_regs: base address for all none control endpoint registers.
+ * @interrupt_regs: base address for interrupt handling related registers.
+ * @adma_regs: base address for ADMA registers.
+ * @eps_dma_pool: endpoint Transfer Ring pool.
+ * @setup: used while processing usb control requests.
+ * @ep0_preq: private request used while handling EP0.
+ * @ep0_stage: ep0 stage during enumeration process.
+ * @zlp_buf: zlp buffer.
+ * @dev_address: device address assigned by host.
+ * @eps: array of objects describing endpoints.
+ * @selected_ep: actually selected endpoint. It's used only to improve
+ *      performance by limiting access to dma_ep_sel register.
+ * @is_selfpowered: device is self powered.
+ * @may_wakeup: allows device to remote wakeup the host.
+ * @status_completion_no_call: indicate that driver is waiting for status
+ *      stage completion. It's used in deferred SET_CONFIGURATION request.
+ * @in_lpm: indicate the controller is in low power mode.
+ * @pending_status_wq: workqueue handling status stage for deferred requests.
+ * @pending_status_request: request for which status stage was deferred.
+ * @eps_supported: endpoints supported by controller in form:
+ *      bit: 0 - ep0, 1 - epOut1, 2 - epIn1, 3 - epOut2 ...
+ * @burst_opt: array with the best burst size value for different TRB size.
+ * @onchip_tx_buf: size of transmit on-chip buffer in KB.
+ * @onchip_rx_buf: size of receive on-chip buffer in KB.
+ */
+struct cdns2_device {
+	struct device *dev;
+	struct usb_gadget gadget;
+	struct usb_gadget_driver *gadget_driver;
+
+	/* generic spin-lock for drivers */
+	spinlock_t lock;
+	int irq;
+	void __iomem *regs;
+	struct cdns2_usb_regs __iomem *usb_regs;
+	struct cdns2_ep0_regs __iomem *ep0_regs;
+	struct cdns2_epx_regs __iomem *epx_regs;
+	struct cdns2_interrupt_regs __iomem *interrupt_regs;
+	struct cdns2_adma_regs __iomem *adma_regs;
+	struct dma_pool *eps_dma_pool;
+	struct usb_ctrlrequest setup;
+	struct cdns2_request ep0_preq;
+	u8 ep0_stage;
+	void *zlp_buf;
+	u8 dev_address;
+	struct cdns2_endpoint eps[CDNS2_ENDPOINTS_NUM];
+	u32 selected_ep;
+	bool is_selfpowered;
+	bool may_wakeup;
+	bool status_completion_no_call;
+	bool in_lpm;
+	struct work_struct pending_status_wq;
+	struct usb_request *pending_status_request;
+	u32 eps_supported;
+	u8 burst_opt[MAX_ISO_SIZE + 1];
+
+	/*in KB */
+	u16 onchip_tx_buf;
+	u16 onchip_rx_buf;
+};
+
+#define CDNS2_IF_EP_EXIST(pdev, ep_num, dir) \
+			 ((pdev)->eps_supported & \
+			 (BIT(ep_num) << ((dir) ? 0 : 16)))
+
+dma_addr_t cdns2_trb_virt_to_dma(struct cdns2_endpoint *pep,
+				 struct cdns2_trb *trb);
+void cdns2_pending_setup_status_handler(struct work_struct *work);
+void cdns2_select_ep(struct cdns2_device *pdev, u32 ep);
+struct cdns2_request *cdns2_next_preq(struct list_head *list);
+struct usb_request *cdns2_gadget_ep_alloc_request(struct usb_ep *ep,
+						  gfp_t gfp_flags);
+void cdns2_gadget_ep_free_request(struct usb_ep *ep,
+				  struct usb_request *request);
+int cdns2_gadget_ep_dequeue(struct usb_ep *ep, struct usb_request *request);
+void cdns2_gadget_giveback(struct cdns2_endpoint *pep,
+			   struct cdns2_request *priv_req,
+			   int status);
+void cdns2_init_ep0(struct cdns2_device *pdev, struct cdns2_endpoint *pep);
+void cdns2_ep0_config(struct cdns2_device *pdev);
+void cdns2_handle_ep0_interrupt(struct cdns2_device *pdev, int dir);
+void cdns2_handle_setup_packet(struct cdns2_device *pdev);
+int cdns2_gadget_resume(struct cdns2_device *pdev, bool hibernated);
+int cdns2_gadget_suspend(struct cdns2_device *pdev);
+void cdns2_gadget_remove(struct cdns2_device *pdev);
+int cdns2_gadget_init(struct cdns2_device *pdev);
+void set_reg_bit_8(void __iomem *ptr, u8 mask);
+int cdns2_halt_endpoint(struct cdns2_device *pdev, struct cdns2_endpoint *pep,
+			int value);
+
+#endif /* __LINUX_CDNS2_GADGET */

linux-7.2.3/drivers/usb/gadget/udc/cdns2/cdns2-pci.c

@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBHS-DEV controller - PCI Glue driver.
+ *
+ * Copyright (C) 2023 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ *
+ */
+
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+
+#include "cdns2-gadget.h"
+
+#define PCI_DRIVER_NAME		"cdns-pci-usbhs"
+#define PCI_BAR_DEV		0
+#define PCI_DEV_FN_DEVICE	0
+
+static int cdns2_pci_probe(struct pci_dev *pdev,
+			   const struct pci_device_id *id)
+{
+	resource_size_t rsrc_start, rsrc_len;
+	struct device *dev = &pdev->dev;
+	struct cdns2_device *priv_dev;
+	struct resource *res;
+	int ret;
+
+	/* For GADGET PCI (devfn) function number is 0. */
+	if (!id || pdev->devfn != PCI_DEV_FN_DEVICE ||
+	    pdev->class != PCI_CLASS_SERIAL_USB_DEVICE)
+		return -EINVAL;
+
+	ret = pcim_enable_device(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Enabling PCI device has failed %d\n", ret);
+		return ret;
+	}
+
+	pci_set_master(pdev);
+
+	priv_dev = devm_kzalloc(&pdev->dev, sizeof(*priv_dev), GFP_KERNEL);
+	if (!priv_dev)
+		return -ENOMEM;
+
+	dev_dbg(dev, "Initialize resources\n");
+	rsrc_start = pci_resource_start(pdev, PCI_BAR_DEV);
+	rsrc_len = pci_resource_len(pdev, PCI_BAR_DEV);
+
+	res = devm_request_mem_region(dev, rsrc_start, rsrc_len, "dev");
+	if (!res) {
+		dev_dbg(dev, "controller already in use\n");
+		return -EBUSY;
+	}
+
+	priv_dev->regs = devm_ioremap(dev, rsrc_start, rsrc_len);
+	if (!priv_dev->regs) {
+		dev_dbg(dev, "error mapping memory\n");
+		return -EFAULT;
+	}
+
+	priv_dev->irq = pdev->irq;
+	dev_dbg(dev, "USBSS-DEV physical base addr: %pa\n",
+		&rsrc_start);
+
+	priv_dev->dev = dev;
+
+	priv_dev->eps_supported = 0x000f000f;
+	priv_dev->onchip_tx_buf = 16;
+	priv_dev->onchip_rx_buf = 16;
+
+	ret = cdns2_gadget_init(priv_dev);
+	if (ret)
+		return ret;
+
+	pci_set_drvdata(pdev, priv_dev);
+
+	device_wakeup_enable(&pdev->dev);
+	if (pci_dev_run_wake(pdev))
+		pm_runtime_put_noidle(&pdev->dev);
+
+	return 0;
+}
+
+static void cdns2_pci_remove(struct pci_dev *pdev)
+{
+	struct cdns2_device *priv_dev = pci_get_drvdata(pdev);
+
+	if (pci_dev_run_wake(pdev))
+		pm_runtime_get_noresume(&pdev->dev);
+
+	cdns2_gadget_remove(priv_dev);
+}
+
+static int cdns2_pci_suspend(struct device *dev)
+{
+	struct cdns2_device *priv_dev = dev_get_drvdata(dev);
+
+	return cdns2_gadget_suspend(priv_dev);
+}
+
+static int cdns2_pci_resume(struct device *dev)
+{
+	struct cdns2_device *priv_dev = dev_get_drvdata(dev);
+
+	return cdns2_gadget_resume(priv_dev, 1);
+}
+
+static const struct dev_pm_ops cdns2_pci_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(cdns2_pci_suspend, cdns2_pci_resume)
+};
+
+static const struct pci_device_id cdns2_pci_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_CDNS, PCI_DEVICE_ID_CDNS_USB),
+	  .class = PCI_CLASS_SERIAL_USB_DEVICE },
+	{ 0, }
+};
+
+static struct pci_driver cdns2_pci_driver = {
+	.name = "cdns2-pci",
+	.id_table = cdns2_pci_ids,
+	.probe = cdns2_pci_probe,
+	.remove = cdns2_pci_remove,
+	.driver = {
+		.pm = pm_ptr(&cdns2_pci_pm_ops),
+	}
+};
+
+module_pci_driver(cdns2_pci_driver);
+MODULE_DEVICE_TABLE(pci, cdns2_pci_ids);
+
+MODULE_ALIAS("pci:cdns2");
+MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cadence CDNS2 PCI driver");

linux-7.2.3/drivers/usb/gadget/udc/cdns2/cdns2-trace.c

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USBHS device controller driver Trace Support
+ *
+ * Copyright (C) 2023 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#define CREATE_TRACE_POINTS
+#include "cdns2-trace.h"

linux-7.2.3/drivers/usb/gadget/udc/cdns2/cdns2-trace.h

@@ -0,0 +1,536 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * USBHS-DEV device controller driver.
+ * Trace support header file.
+ *
+ * Copyright (C) 2023 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM cdns2-dev
+
+/*
+ * The TRACE_SYSTEM_VAR defaults to TRACE_SYSTEM, but must be a
+ * legitimate C variable. It is not exported to user space.
+ */
+#undef TRACE_SYSTEM_VAR
+#define TRACE_SYSTEM_VAR cdns2_dev
+
+#if !defined(__LINUX_CDNS2_TRACE) || defined(TRACE_HEADER_MULTI_READ)
+#define __LINUX_CDNS2_TRACE
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+#include <asm/byteorder.h>
+#include <linux/usb/ch9.h>
+#include "cdns2-gadget.h"
+#include "cdns2-debug.h"
+
+#define CDNS2_MSG_MAX	500
+
+DECLARE_EVENT_CLASS(cdns2_log_enable_disable,
+	TP_PROTO(int set),
+	TP_ARGS(set),
+	TP_STRUCT__entry(
+		__field(int, set)
+	),
+	TP_fast_assign(
+		__entry->set = set;
+	),
+	TP_printk("%s", __entry->set ? "enabled" : "disabled")
+);
+
+DEFINE_EVENT(cdns2_log_enable_disable, cdns2_pullup,
+	TP_PROTO(int set),
+	TP_ARGS(set)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_simple,
+	TP_PROTO(char *msg),
+	TP_ARGS(msg),
+	TP_STRUCT__entry(
+		__string(text, msg)
+	),
+	TP_fast_assign(
+		__assign_str(text);
+	),
+	TP_printk("%s", __get_str(text))
+);
+
+DEFINE_EVENT(cdns2_log_simple, cdns2_no_room_on_ring,
+	TP_PROTO(char *msg),
+	TP_ARGS(msg)
+);
+
+DEFINE_EVENT(cdns2_log_simple, cdns2_ep0_status_stage,
+	TP_PROTO(char *msg),
+	TP_ARGS(msg)
+);
+
+DEFINE_EVENT(cdns2_log_simple, cdns2_ep0_setup,
+	TP_PROTO(char *msg),
+	TP_ARGS(msg)
+);
+
+DEFINE_EVENT(cdns2_log_simple, cdns2_device_state,
+	TP_PROTO(char *msg),
+	TP_ARGS(msg)
+);
+
+TRACE_EVENT(cdns2_ep_halt,
+	TP_PROTO(struct cdns2_endpoint *ep_priv, u8 halt, u8 flush),
+	TP_ARGS(ep_priv, halt, flush),
+	TP_STRUCT__entry(
+		__string(name, ep_priv->name)
+		__field(u8, halt)
+		__field(u8, flush)
+	),
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->halt = halt;
+		__entry->flush = flush;
+	),
+	TP_printk("Halt %s for %s: %s", __entry->flush ? " and flush" : "",
+		  __get_str(name), __entry->halt ? "set" : "cleared")
+);
+
+TRACE_EVENT(cdns2_wa1,
+	TP_PROTO(struct cdns2_endpoint *ep_priv, char *msg),
+	TP_ARGS(ep_priv, msg),
+	TP_STRUCT__entry(
+		__string(ep_name, ep_priv->name)
+		__string(msg, msg)
+	),
+	TP_fast_assign(
+		__assign_str(ep_name);
+		__assign_str(msg);
+	),
+	TP_printk("WA1: %s %s", __get_str(ep_name), __get_str(msg))
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_doorbell,
+	TP_PROTO(struct cdns2_endpoint *pep, u32 ep_trbaddr),
+	TP_ARGS(pep, ep_trbaddr),
+	TP_STRUCT__entry(
+		__string(name, pep->num ? pep->name :
+				(pep->dir ? "ep0in" : "ep0out"))
+		__field(u32, ep_trbaddr)
+	),
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->ep_trbaddr = ep_trbaddr;
+	),
+	TP_printk("%s, ep_trbaddr %08x", __get_str(name),
+		  __entry->ep_trbaddr)
+);
+
+DEFINE_EVENT(cdns2_log_doorbell, cdns2_doorbell_ep0,
+	TP_PROTO(struct cdns2_endpoint *pep, u32 ep_trbaddr),
+	TP_ARGS(pep, ep_trbaddr)
+);
+
+DEFINE_EVENT(cdns2_log_doorbell, cdns2_doorbell_epx,
+	TP_PROTO(struct cdns2_endpoint *pep, u32 ep_trbaddr),
+	TP_ARGS(pep, ep_trbaddr)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_usb_irq,
+	TP_PROTO(u32 usb_irq, u32 ext_irq),
+	TP_ARGS(usb_irq, ext_irq),
+	TP_STRUCT__entry(
+		__field(u32, usb_irq)
+		__field(u32, ext_irq)
+	),
+	TP_fast_assign(
+		__entry->usb_irq = usb_irq;
+		__entry->ext_irq = ext_irq;
+	),
+	TP_printk("%s", cdns2_decode_usb_irq(__get_buf(CDNS2_MSG_MAX),
+					     CDNS2_MSG_MAX,
+					     __entry->usb_irq,
+					     __entry->ext_irq))
+);
+
+DEFINE_EVENT(cdns2_log_usb_irq, cdns2_usb_irq,
+	TP_PROTO(u32 usb_irq, u32 ext_irq),
+	TP_ARGS(usb_irq, ext_irq)
+);
+
+TRACE_EVENT(cdns2_dma_ep_ists,
+	TP_PROTO(u32 dma_ep_ists),
+	TP_ARGS(dma_ep_ists),
+	TP_STRUCT__entry(
+		__field(u32, dma_ep_ists)
+	),
+	TP_fast_assign(
+		__entry->dma_ep_ists = dma_ep_ists;
+	),
+	TP_printk("OUT: 0x%04x, IN: 0x%04x", (u16)__entry->dma_ep_ists,
+		  __entry->dma_ep_ists >> 16)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_epx_irq,
+	TP_PROTO(struct cdns2_device *pdev, struct cdns2_endpoint *pep),
+	TP_ARGS(pdev, pep),
+	TP_STRUCT__entry(
+		__string(ep_name, pep->name)
+		__field(u32, ep_sts)
+		__field(u32, ep_ists)
+		__field(u32, ep_traddr)
+	),
+	TP_fast_assign(
+		__assign_str(ep_name);
+		__entry->ep_sts = readl(&pdev->adma_regs->ep_sts);
+		__entry->ep_ists = readl(&pdev->adma_regs->ep_ists);
+		__entry->ep_traddr = readl(&pdev->adma_regs->ep_traddr);
+	),
+	TP_printk("%s, ep_traddr: %08x",
+		  cdns2_decode_epx_irq(__get_buf(CDNS2_MSG_MAX), CDNS2_MSG_MAX,
+				       __get_str(ep_name),
+				       __entry->ep_ists, __entry->ep_sts),
+		  __entry->ep_traddr)
+);
+
+DEFINE_EVENT(cdns2_log_epx_irq, cdns2_epx_irq,
+	TP_PROTO(struct cdns2_device *pdev, struct cdns2_endpoint *pep),
+	TP_ARGS(pdev, pep)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_ep0_irq,
+	TP_PROTO(struct cdns2_device *pdev),
+	TP_ARGS(pdev),
+	TP_STRUCT__entry(
+		__field(int, ep_dir)
+		__field(u32, ep_ists)
+		__field(u32, ep_sts)
+	),
+	TP_fast_assign(
+		__entry->ep_dir = pdev->selected_ep;
+		__entry->ep_ists = readl(&pdev->adma_regs->ep_ists);
+		__entry->ep_sts = readl(&pdev->adma_regs->ep_sts);
+	),
+	TP_printk("%s", cdns2_decode_ep0_irq(__get_buf(CDNS2_MSG_MAX),
+					     CDNS2_MSG_MAX,
+					     __entry->ep_ists, __entry->ep_sts,
+					     __entry->ep_dir))
+);
+
+DEFINE_EVENT(cdns2_log_ep0_irq, cdns2_ep0_irq,
+	TP_PROTO(struct cdns2_device *pdev),
+	TP_ARGS(pdev)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_ctrl,
+	TP_PROTO(struct usb_ctrlrequest *ctrl),
+	TP_ARGS(ctrl),
+	TP_STRUCT__entry(
+		__field(u8, bRequestType)
+		__field(u8, bRequest)
+		__field(u16, wValue)
+		__field(u16, wIndex)
+		__field(u16, wLength)
+	),
+	TP_fast_assign(
+		__entry->bRequestType = ctrl->bRequestType;
+		__entry->bRequest = ctrl->bRequest;
+		__entry->wValue = le16_to_cpu(ctrl->wValue);
+		__entry->wIndex = le16_to_cpu(ctrl->wIndex);
+		__entry->wLength = le16_to_cpu(ctrl->wLength);
+	),
+	TP_printk("%s", usb_decode_ctrl(__get_buf(CDNS2_MSG_MAX), CDNS2_MSG_MAX,
+					__entry->bRequestType,
+					__entry->bRequest, __entry->wValue,
+					__entry->wIndex, __entry->wLength)
+	)
+);
+
+DEFINE_EVENT(cdns2_log_ctrl, cdns2_ctrl_req,
+	TP_PROTO(struct usb_ctrlrequest *ctrl),
+	TP_ARGS(ctrl)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_request,
+	TP_PROTO(struct cdns2_request *preq),
+	TP_ARGS(preq),
+	TP_STRUCT__entry(
+		__string(name, preq->pep->name)
+		__field(struct usb_request *, request)
+		__field(struct cdns2_request *, preq)
+		__field(void *, buf)
+		__field(unsigned int, actual)
+		__field(unsigned int, length)
+		__field(int, status)
+		__field(dma_addr_t, dma)
+		__field(int, zero)
+		__field(int, short_not_ok)
+		__field(int, no_interrupt)
+		__field(struct scatterlist*, sg)
+		__field(unsigned int, num_sgs)
+		__field(unsigned int, num_mapped_sgs)
+		__field(int, start_trb)
+		__field(int, end_trb)
+	),
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->request = &preq->request;
+		__entry->preq = preq;
+		__entry->buf = preq->request.buf;
+		__entry->actual = preq->request.actual;
+		__entry->length = preq->request.length;
+		__entry->status = preq->request.status;
+		__entry->dma = preq->request.dma;
+		__entry->zero = preq->request.zero;
+		__entry->short_not_ok = preq->request.short_not_ok;
+		__entry->no_interrupt = preq->request.no_interrupt;
+		__entry->sg = preq->request.sg;
+		__entry->num_sgs = preq->request.num_sgs;
+		__entry->num_mapped_sgs = preq->request.num_mapped_sgs;
+		__entry->start_trb = preq->start_trb;
+		__entry->end_trb = preq->end_trb;
+	),
+	TP_printk("%s: req: %p, preq: %p, req buf: %p, length: %u/%u, status: %d,"
+		  "buf dma: (%pad), %s%s%s, sg: %p, num_sgs: %d, num_m_sgs: %d,"
+		  "trb: [start: %d, end: %d]",
+		  __get_str(name), __entry->request, __entry->preq,
+		  __entry->buf, __entry->actual, __entry->length,
+		  __entry->status, &__entry->dma,
+		  __entry->zero ? "Z" : "z",
+		  __entry->short_not_ok ? "S" : "s",
+		  __entry->no_interrupt ? "I" : "i",
+		  __entry->sg, __entry->num_sgs, __entry->num_mapped_sgs,
+		  __entry->start_trb,
+		  __entry->end_trb
+	)
+);
+
+DEFINE_EVENT(cdns2_log_request, cdns2_request_enqueue,
+	TP_PROTO(struct cdns2_request *preq),
+	TP_ARGS(preq)
+);
+
+DEFINE_EVENT(cdns2_log_request, cdns2_request_enqueue_error,
+	TP_PROTO(struct cdns2_request *preq),
+	TP_ARGS(preq)
+);
+
+DEFINE_EVENT(cdns2_log_request, cdns2_alloc_request,
+	TP_PROTO(struct cdns2_request *preq),
+	TP_ARGS(preq)
+);
+
+DEFINE_EVENT(cdns2_log_request, cdns2_free_request,
+	TP_PROTO(struct cdns2_request *preq),
+	TP_ARGS(preq)
+);
+
+DEFINE_EVENT(cdns2_log_request, cdns2_request_dequeue,
+	TP_PROTO(struct cdns2_request *preq),
+	TP_ARGS(preq)
+);
+
+DEFINE_EVENT(cdns2_log_request, cdns2_request_giveback,
+	TP_PROTO(struct cdns2_request *preq),
+	TP_ARGS(preq)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_trb,
+	TP_PROTO(struct cdns2_endpoint *pep, struct cdns2_trb *trb),
+	TP_ARGS(pep, trb),
+	TP_STRUCT__entry(
+		__string(name, pep->name)
+		__field(struct cdns2_trb *, trb)
+		__field(u32, buffer)
+		__field(u32, length)
+		__field(u32, control)
+		__field(u32, type)
+	),
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->trb = trb;
+		__entry->buffer = le32_to_cpu(trb->buffer);
+		__entry->length = le32_to_cpu(trb->length);
+		__entry->control = le32_to_cpu(trb->control);
+		__entry->type = usb_endpoint_type(pep->endpoint.desc);
+	),
+	TP_printk("%s: trb V: %p, dma buf: P: 0x%08x, %s",
+		 __get_str(name), __entry->trb, __entry->buffer,
+		 cdns2_decode_trb(__get_buf(CDNS2_MSG_MAX), CDNS2_MSG_MAX,
+				  __entry->control, __entry->length,
+				  __entry->buffer))
+);
+
+DEFINE_EVENT(cdns2_log_trb, cdns2_queue_trb,
+	TP_PROTO(struct cdns2_endpoint *pep, struct cdns2_trb *trb),
+	TP_ARGS(pep, trb)
+);
+
+DEFINE_EVENT(cdns2_log_trb, cdns2_complete_trb,
+	TP_PROTO(struct cdns2_endpoint *pep, struct cdns2_trb *trb),
+	TP_ARGS(pep, trb)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_ring,
+	TP_PROTO(struct cdns2_endpoint *pep),
+	TP_ARGS(pep),
+	TP_STRUCT__entry(
+		__dynamic_array(u8, tr_seg, TR_SEG_SIZE)
+		__dynamic_array(u8, pep, sizeof(struct cdns2_endpoint))
+		__dynamic_array(char, buffer,
+				(TRBS_PER_SEGMENT * 65) + CDNS2_MSG_MAX)
+	),
+	TP_fast_assign(
+		memcpy(__get_dynamic_array(pep), pep,
+		       sizeof(struct cdns2_endpoint));
+		memcpy(__get_dynamic_array(tr_seg), pep->ring.trbs,
+		       TR_SEG_SIZE);
+	),
+
+	TP_printk("%s",
+		  cdns2_raw_ring((struct cdns2_endpoint *)__get_str(pep),
+				    (struct cdns2_trb *)__get_str(tr_seg),
+				    __get_str(buffer),
+				    (TRBS_PER_SEGMENT * 65) + CDNS2_MSG_MAX))
+);
+
+DEFINE_EVENT(cdns2_log_ring, cdns2_ring,
+	TP_PROTO(struct cdns2_endpoint *pep),
+	TP_ARGS(pep)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_ep,
+	TP_PROTO(struct cdns2_endpoint *pep),
+	TP_ARGS(pep),
+	TP_STRUCT__entry(
+		__string(name, pep->name)
+		__field(unsigned int, maxpacket)
+		__field(unsigned int, maxpacket_limit)
+		__field(unsigned int, flags)
+		__field(unsigned int, dir)
+		__field(u8, enqueue)
+		__field(u8, dequeue)
+	),
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->maxpacket = pep->endpoint.maxpacket;
+		__entry->maxpacket_limit = pep->endpoint.maxpacket_limit;
+		__entry->flags = pep->ep_state;
+		__entry->dir = pep->dir;
+		__entry->enqueue = pep->ring.enqueue;
+		__entry->dequeue = pep->ring.dequeue;
+	),
+	TP_printk("%s: mps: %d/%d, enq idx: %d, deq idx: %d, "
+		  "flags: %s%s%s%s, dir: %s",
+		__get_str(name), __entry->maxpacket,
+		__entry->maxpacket_limit, __entry->enqueue,
+		__entry->dequeue,
+		__entry->flags & EP_ENABLED ? "EN | " : "",
+		__entry->flags & EP_STALLED ? "STALLED | " : "",
+		__entry->flags & EP_WEDGE ? "WEDGE | " : "",
+		__entry->flags & EP_RING_FULL ? "RING FULL |" : "",
+		__entry->dir ? "IN" : "OUT"
+	)
+);
+
+DEFINE_EVENT(cdns2_log_ep, cdns2_gadget_ep_enable,
+	TP_PROTO(struct cdns2_endpoint *pep),
+	TP_ARGS(pep)
+);
+
+DEFINE_EVENT(cdns2_log_ep, cdns2_gadget_ep_disable,
+	TP_PROTO(struct cdns2_endpoint *pep),
+	TP_ARGS(pep)
+);
+
+DEFINE_EVENT(cdns2_log_ep, cdns2_ep_busy_try_halt_again,
+	TP_PROTO(struct cdns2_endpoint *pep),
+	TP_ARGS(pep)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_request_handled,
+	TP_PROTO(struct cdns2_request *priv_req, int current_index,
+		 int handled),
+	TP_ARGS(priv_req, current_index, handled),
+	TP_STRUCT__entry(
+		__field(struct cdns2_request *, priv_req)
+		__field(unsigned int, dma_position)
+		__field(unsigned int, handled)
+		__field(unsigned int, dequeue_idx)
+		__field(unsigned int, enqueue_idx)
+		__field(unsigned int, start_trb)
+		__field(unsigned int, end_trb)
+	),
+	TP_fast_assign(
+		__entry->priv_req = priv_req;
+		__entry->dma_position = current_index;
+		__entry->handled = handled;
+		__entry->dequeue_idx = priv_req->pep->ring.dequeue;
+		__entry->enqueue_idx = priv_req->pep->ring.enqueue;
+		__entry->start_trb = priv_req->start_trb;
+		__entry->end_trb = priv_req->end_trb;
+	),
+	TP_printk("Req: %p %s, DMA pos: %d, ep deq: %d, ep enq: %d,"
+		  " start trb: %d, end trb: %d",
+		__entry->priv_req,
+		__entry->handled ? "handled" : "not handled",
+		__entry->dma_position, __entry->dequeue_idx,
+		__entry->enqueue_idx, __entry->start_trb,
+		__entry->end_trb
+	)
+);
+
+DEFINE_EVENT(cdns2_log_request_handled, cdns2_request_handled,
+	TP_PROTO(struct cdns2_request *priv_req, int current_index,
+		 int handled),
+	TP_ARGS(priv_req, current_index, handled)
+);
+
+DECLARE_EVENT_CLASS(cdns2_log_epx_reg_config,
+	TP_PROTO(struct cdns2_device *pdev, struct cdns2_endpoint *pep),
+	TP_ARGS(pdev, pep),
+	TP_STRUCT__entry(
+		__string(ep_name, pep->name)
+		__field(u8, burst_size)
+		__field(__le16, maxpack_reg)
+		__field(__u8, con_reg)
+		__field(u32, ep_sel_reg)
+		__field(u32, ep_sts_en_reg)
+		__field(u32, ep_cfg_reg)
+	),
+	TP_fast_assign(
+		__assign_str(ep_name);
+		__entry->burst_size = pep->trb_burst_size;
+		__entry->maxpack_reg = pep->dir ? readw(&pdev->epx_regs->txmaxpack[pep->num - 1]) :
+						  readw(&pdev->epx_regs->rxmaxpack[pep->num - 1]);
+		__entry->con_reg = pep->dir ? readb(&pdev->epx_regs->ep[pep->num - 1].txcon) :
+					      readb(&pdev->epx_regs->ep[pep->num - 1].rxcon);
+		__entry->ep_sel_reg = readl(&pdev->adma_regs->ep_sel);
+		__entry->ep_sts_en_reg = readl(&pdev->adma_regs->ep_sts_en);
+		__entry->ep_cfg_reg = readl(&pdev->adma_regs->ep_cfg);
+	),
+
+	TP_printk("%s, maxpack: %d, con: %02x, dma_ep_sel: %08x, dma_ep_sts_en: %08x"
+		  " dma_ep_cfg %08x",
+		  __get_str(ep_name), __entry->maxpack_reg, __entry->con_reg,
+		  __entry->ep_sel_reg, __entry->ep_sts_en_reg,
+		  __entry->ep_cfg_reg
+	)
+);
+
+DEFINE_EVENT(cdns2_log_epx_reg_config, cdns2_epx_hw_cfg,
+	TP_PROTO(struct cdns2_device *pdev, struct cdns2_endpoint *pep),
+	TP_ARGS(pdev, pep)
+);
+
+#endif /* __LINUX_CDNS2_TRACE */
+
+/* This part must be outside header guard. */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE cdns2-trace
+
+#include <trace/define_trace.h>