lkml.org 
[lkml]   [2019]   [Mar]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
SubjectRE: [PATCH v4 5/6] usb:cdns3 Add Cadence USB3 DRD Driver
Date
Hi Peter

>
>> +int cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode)
>> +{
>> + int ret = 0;
>> + u32 reg;
>> +
>> + cdns->current_dr_mode = mode;
>> +
>> + switch (mode) {
>> + case USB_DR_MODE_PERIPHERAL:
>> + dev_info(cdns->dev, "Set controller to Gadget mode\n");
>> + ret = cdns3_drd_switch_gadget(cdns, 1);
>> + break;
>> + case USB_DR_MODE_HOST:
>> + dev_info(cdns->dev, "Set controller to Host mode\n");
>> + ret = cdns3_drd_switch_host(cdns, 1);
>> + break;
>> + case USB_DR_MODE_OTG:
>> + dev_info(cdns->dev, "Set controller to OTG mode\n");
>> + if (cdns->version == CDNS3_CONTROLLER_V1) {
>> + reg = readl(&cdns->otg_v1_regs->override);
>> + reg |= OVERRIDE_IDPULLUP;
>> + writel(reg, &cdns->otg_v1_regs->override);
>> + } else {
>> + reg = readl(&cdns->otg_v0_regs->ctrl1);
>> + reg |= OVERRIDE_IDPULLUP_V0;
>> + writel(reg, &cdns->otg_v0_regs->ctrl1);
>> + }
>> +
>> + /*
>> + * Hardware specification says: "ID_VALUE must be valid within
>> + * 50ms after idpullup is set to '1" so driver must wait
>> + * 50ms before reading this pin.
>> + */
>> + usleep_range(50000, 60000);
>> + break;
>> + default:
>> + cdns->current_dr_mode = USB_DR_MODE_UNKNOWN;
>> + dev_err(cdns->dev, "Unsupported mode of operation %d\n", mode);
>> + return -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +int cdns3_get_id(struct cdns3 *cdns)
>> +{
>> + int id;
>> +
>> + id = readl(&cdns->otg_regs->sts) & OTGSTS_ID_VALUE;
>> + dev_dbg(cdns->dev, "OTG ID: %d", id);
>> + return id;
>> +}
>> +
>> +int cdns3_is_host(struct cdns3 *cdns)
>> +{
>> + if (cdns->current_dr_mode == USB_DR_MODE_HOST)
>> + return 1;
>
>I run out issue if I set dr_mode as host at dts (firmware). We need to return
>1 at this case, but the cdns->current_dr_mode is changed to OTG before.
>If we set peripheral-only or host-only at dts, the above judgement should
>only reply on dts setting. Below changes work at my platform:
>
>diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c
>index 3e56338cd7b9..2e3d2d19aaa3 100644
>--- a/drivers/usb/cdns3/drd.c
>+++ b/drivers/usb/cdns3/drd.c
>@@ -81,7 +81,7 @@ int cdns3_get_id(struct cdns3 *cdns)
>
> int cdns3_is_host(struct cdns3 *cdns)
> {
>- if (cdns->current_dr_mode == USB_DR_MODE_HOST)
>+ if (usb_get_dr_mode(cdns->dev) == USB_DR_MODE_HOST)
> return 1;
> else if (!cdns3_get_id(cdns))
> return 1;
>@@ -91,7 +91,7 @@ int cdns3_is_host(struct cdns3 *cdns)
>
> int cdns3_is_device(struct cdns3 *cdns)
> {
>- if (cdns->current_dr_mode == USB_DR_MODE_PERIPHERAL)
>+ if (usb_get_dr_mode(cdns->dev) == USB_DR_MODE_PERIPHERAL)
> return 1;
> else if (cdns->current_dr_mode == USB_DR_MODE_OTG)
> if (cdns3_get_id(cdns))
>@@ -230,6 +230,8 @@ int cdns3_drd_update_mode(struct cdns3 *cdns)
>
>
>Below is the output I set dr_mode as host:
>[ 2.743538] cdns-usb3 5b130000.cdns3: DRD version v0 (00000100)
>[ 2.749476] cdns-usb3 5b130000.cdns3: Controller strapped to HOST
>[ 2.755638] cdns-usb3 5b130000.cdns3: cdns3_drd_update_mode:1:0:1
>[ 2.763764] cdns-usb3 5b130000.cdns3: Set controller to Host mode
>[ 2.769868] cdns-usb3 5b130000.cdns3: Waiting for Host mode is turned on
>[ 2.769881] cdns-usb3 5b130000.cdns3: cdns3_drd_update_mode:3:1:3
>[ 2.777990] cdns-usb3 5b130000.cdns3: Set controller to OTG mode
>[ 2.849353] cdns-usb3 5b130000.cdns3: Waiting for Host mode is turned on
>[ 2.849689] cdns-usb3 5b130000.cdns3: Cadence USB3 core: probe succeed
>[ 2.849722] nxp-cdns3 5b110000.usb3: Cadence USB3 core: probe succeed
>
>From above log, the cdns3_drd_update_mode is called twice, and the controller
>switches like INIT_MODE->HOST->OTG->HOST. Your role initialization is a little
> complicated, please try to simply it.Please try to simply it.
>Besides, do you really
>need so many variables for dr_mode? dr_mode is static from firmware, the dynamic
>status can be described by cdns->role.
>
>Below is the output I set dr_mode as peripheral:
>[ 1.900029] cdns-usb3 5b130000.cdns3: DRD version v0 (00000100)
>[ 1.905983] cdns-usb3 5b130000.cdns3: Controller strapped to PERIPHERAL
>[ 1.912669] cdns-usb3 5b130000.cdns3: cdns3_drd_update_mode:2:0:2
>[ 1.920803] cdns-usb3 5b130000.cdns3: Set controller to Gadget mode
>[ 1.927121] cdns-usb3 5b130000.cdns3: Waiting for Device mode is turned on
>[ 1.927138] cdns-usb3 5b130000.cdns3: cdns3_drd_update_mode:3:2:3
>[ 1.935261] cdns-usb3 5b130000.cdns3: Set controller to OTG mode
>[ 2.001305] cdns-usb3 5b130000.cdns3: OTG ID: 1
>[ 2.001312] cdns-usb3 5b130000.cdns3: Waiting for Device mode is turned on
>[ 2.001321] cdns-usb3 5b130000.cdns3: OTG ID: 1
>[ 2.001334] cdns-usb3 5b130000.cdns3: Initializing non-zero endpoints
>

Thank for information.
To resolve this issue please replace the fragment in dns3_core_init_role:
/*
* At this point cdns->dr_mode contains strap configuration.
* Driver try update this setting considering kernel configuration
*/
best_dr_mode = USB_DR_MODE_OTG;
with:
/*
* At this point cdns->dr_mode contains strap configuration.
* Driver try update this setting considering kernel configuration
*/
best_dr_mode = cdns->dr_mode;

It will be added in next version.

>And the output for cdns3_drd_update_mode is:
>@@ -230,6 +230,8 @@ int cdns3_drd_update_mode(struct cdns3 *cdns)
> {
> int ret = 0;
>
>+ dev_dbg(cdns->dev, "%s:%d:%d:%d \n", __func__, cdns->desired_dr_mode,
>+ cdns->current_dr_mode, cdns->dr_mode);
>
>Besides above issue, seems you forget to set OTGSIMULATE.OTG_CFG_FAST_SIMS,
>The set host will timeout when switch from otg to host.
>
>Below code works at my side
>
>@@ -314,6 +316,7 @@ int cdns3_drd_init(struct cdns3 *cdns)
> cdns->version = CDNS3_CONTROLLER_V0;
> cdns->otg_v1_regs = NULL;
> cdns->otg_regs = regs;
>+ writel(1, &cdns->otg_v0_regs->simulate);

I'm not sure if this a proper solution, but I will add this line to next version.
SIMULATE register is dedicated for simulation environment. Without this
driver would have to wait 1s for IDLE state.

> dev_info(cdns->dev, "DRD version v0 (%08x)\n",
> readl(&cdns->otg_v0_regs->version));
>
>Peter
>
>> + else if (!cdns3_get_id(cdns))
>> + return 1;
>> +
>> + return 0;
>> +}
>> +
>
>
>> +int cdns3_is_device(struct cdns3 *cdns)
>> +{
>> + if (cdns->current_dr_mode == USB_DR_MODE_PERIPHERAL)
>> + return 1;
>> + else if (cdns->current_dr_mode == USB_DR_MODE_OTG)
>> + if (cdns3_get_id(cdns))
>> + return 1;
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_otg_disable_irq - Disable all OTG interrupts
>> + * @cdns: Pointer to controller context structure
>> + */
>> +static void cdns3_otg_disable_irq(struct cdns3 *cdns)
>> +{
>> + writel(0, &cdns->otg_regs->ien);
>> +}
>> +
>> +/**
>> + * cdns3_otg_enable_irq - enable id and sess_valid interrupts
>> + * @cdns: Pointer to controller context structure
>> + */
>> +static void cdns3_otg_enable_irq(struct cdns3 *cdns)
>> +{
>> + writel(OTGIEN_ID_CHANGE_INT | OTGIEN_VBUSVALID_RISE_INT |
>> + OTGIEN_VBUSVALID_FALL_INT, &cdns->otg_regs->ien);
>> +}
>> +
>> +/**
>> + * cdns3_drd_switch_host - start/stop host
>> + * @cdns: Pointer to controller context structure
>> + * @on: 1 for start, 0 for stop
>> + *
>> + * Returns 0 on success otherwise negative errno
>> + */
>> +static int cdns3_drd_switch_host(struct cdns3 *cdns, int on)
>> +{
>> + int ret;
>> + u32 reg = OTGCMD_OTG_DIS;
>> +
>> + /* switch OTG core */
>> + if (on) {
>> + writel(OTGCMD_HOST_BUS_REQ | reg, &cdns->otg_regs->cmd);
>> +
>> + dev_dbg(cdns->dev, "Waiting for Host mode is turned on\n");
>> + ret = cdns3_handshake(&cdns->otg_regs->sts, OTGSTS_XHCI_READY,
>> + OTGSTS_XHCI_READY, 100000);
>> +
>> + if (ret)
>> + return ret;
>> + } else {
>> + usleep_range(30, 40);
>> + writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP |
>> + OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF,
>> + &cdns->otg_regs->cmd);
>> + usleep_range(3000, 4000);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_drd_switch_gadget - start/stop gadget
>> + * @cdns: Pointer to controller context structure
>> + * @on: 1 for start, 0 for stop
>> + *
>> + * Returns 0 on success otherwise negative errno
>> + */
>> +static int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on)
>> +{
>> + int ret;
>> + u32 reg = OTGCMD_OTG_DIS;
>> +
>> + /* switch OTG core */
>> + if (on) {
>> + writel(OTGCMD_DEV_BUS_REQ | reg, &cdns->otg_regs->cmd);
>> +
>> + dev_dbg(cdns->dev, "Waiting for Device mode is turned on\n");
>> +
>> + ret = cdns3_handshake(&cdns->otg_regs->sts, OTGSTS_DEV_READY,
>> + OTGSTS_DEV_READY, 100000);
>> +
>> + if (ret)
>> + return ret;
>> + } else {
>> + /*
>> + * driver should wait at least 10us after disabling Device
>> + * before turning-off Device (DEV_BUS_DROP)
>> + */
>> + usleep_range(20, 30);
>> + writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP |
>> + OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF,
>> + &cdns->otg_regs->cmd);
>> + usleep_range(3000, 4000);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_init_otg_mode - initialize drd controller
>> + * @cdns: Pointer to controller context structure
>> + *
>> + * Returns 0 on success otherwise negative errno
>> + */
>> +static int cdns3_init_otg_mode(struct cdns3 *cdns)
>> +{
>> + int ret = 0;
>> +
>> + cdns3_otg_disable_irq(cdns);
>> + /* clear all interrupts */
>> + writel(~0, &cdns->otg_regs->ivect);
>> +
>> + ret = cdns3_set_mode(cdns, USB_DR_MODE_OTG);
>> + if (ret)
>> + return ret;
>> +
>> + if (cdns3_is_host(cdns))
>> + ret = cdns3_drd_switch_host(cdns, 1);
>> + else
>> + ret = cdns3_drd_switch_gadget(cdns, 1);
>> +
>> + if (ret)
>> + return ret;
>> +
>> + cdns3_otg_enable_irq(cdns);
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_drd_update_mode - initialize mode of operation
>> + * @cdns: Pointer to controller context structure
>> + *
>> + * Returns 0 on success otherwise negative errno
>> + */
>> +int cdns3_drd_update_mode(struct cdns3 *cdns)
>> +{
>> + int ret = 0;
>> +
>> + if (cdns->desired_dr_mode == cdns->current_dr_mode)
>> + return ret;
>> +
>> + cdns3_drd_switch_gadget(cdns, 0);
>> + cdns3_drd_switch_host(cdns, 0);
>> +
>> + switch (cdns->desired_dr_mode) {
>> + case USB_DR_MODE_PERIPHERAL:
>> + ret = cdns3_set_mode(cdns, USB_DR_MODE_PERIPHERAL);
>> + break;
>> + case USB_DR_MODE_HOST:
>> + ret = cdns3_set_mode(cdns, USB_DR_MODE_HOST);
>> + break;
>> + case USB_DR_MODE_OTG:
>> + ret = cdns3_init_otg_mode(cdns);
>> + break;
>> + default:
>> + dev_err(cdns->dev, "Unsupported mode of operation %d\n",
>> + cdns->dr_mode);
>> + return -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_drd_irq - interrupt handler for OTG events
>> + *
>> + * @irq: irq number for cdns3 core device
>> + * @data: structure of cdns3
>> + *
>> + * Returns IRQ_HANDLED or IRQ_NONE
>> + */
>> +static irqreturn_t cdns3_drd_irq(int irq, void *data)
>> +{
>> + irqreturn_t ret = IRQ_NONE;
>> + struct cdns3 *cdns = data;
>> + u32 reg;
>> +
>> + if (cdns->dr_mode != USB_DR_MODE_OTG)
>> + return ret;
>> +
>> + reg = readl(&cdns->otg_regs->ivect);
>> +
>> + if (!reg)
>> + return ret;
>> +
>> + if (reg & OTGIEN_ID_CHANGE_INT) {
>> + dev_dbg(cdns->dev, "OTG IRQ: new ID: %d\n",
>> + cdns3_get_id(cdns));
>> +
>> + queue_work(system_freezable_wq, &cdns->role_switch_wq);
>> +
>> + ret = IRQ_HANDLED;
>> + }
>> +
>> + writel(~0, &cdns->otg_regs->ivect);
>> + return ret;
>> +}
>> +
>> +int cdns3_drd_init(struct cdns3 *cdns)
>> +{
>> + void __iomem *regs;
>> + int ret = 0;
>> + u32 state;
>> +
>> + regs = devm_ioremap_resource(cdns->dev, &cdns->otg_res);
>> + if (IS_ERR(regs))
>> + return PTR_ERR(regs);
>> +
>> + /* Detection of DRD version. Controller has been released
>> + * in two versions. Both are similar, but they have same changes
>> + * in register maps.
>> + * The first register in old version is command register and it's read
>> + * only, so driver should read 0 from it. On the other hand, in v1
>> + * the first register contains device ID number which is not set to 0.
>> + * Driver uses this fact to detect the proper version of
>> + * controller.
>> + */
>> + cdns->otg_v0_regs = regs;
>> + if (!readl(&cdns->otg_v0_regs->cmd)) {
>> + cdns->version = CDNS3_CONTROLLER_V0;
>> + cdns->otg_v1_regs = NULL;
>> + cdns->otg_regs = regs;
>> + dev_info(cdns->dev, "DRD version v0 (%08x)\n",
>> + readl(&cdns->otg_v0_regs->version));
>> + } else {
>> + cdns->otg_v0_regs = NULL;
>> + cdns->otg_v1_regs = regs;
>> + cdns->otg_regs = (void *)&cdns->otg_v1_regs->cmd;
>> + cdns->version = CDNS3_CONTROLLER_V1;
>> + dev_info(cdns->dev, "DRD version v1 (ID: %08x, rev: %08x)\n",
>> + readl(&cdns->otg_v1_regs->did),
>> + readl(&cdns->otg_v1_regs->rid));
>> + }
>> +
>> + state = OTGSTS_STRAP(readl(&cdns->otg_regs->sts));
>> +
>> + /* Update dr_mode according to STRAP configuration. */
>> + cdns->dr_mode = USB_DR_MODE_OTG;
>> + if (state == OTGSTS_STRAP_HOST) {
>> + dev_info(cdns->dev, "Controller strapped to HOST\n");
>> + cdns->dr_mode = USB_DR_MODE_HOST;
>> + } else if (state == OTGSTS_STRAP_GADGET) {
>> + dev_info(cdns->dev, "Controller strapped to PERIPHERAL\n");
>> + cdns->dr_mode = USB_DR_MODE_PERIPHERAL;
>> + }
>> +
>> + cdns->desired_dr_mode = cdns->dr_mode;
>> + cdns->current_dr_mode = USB_DR_MODE_UNKNOWN;
>> +
>> + ret = devm_request_threaded_irq(cdns->dev, cdns->irq, cdns3_drd_irq,
>> + NULL, IRQF_SHARED,
>> + dev_name(cdns->dev), cdns);
>> +
>> + if (ret)
>> + return ret;
>> +
>> + state = readl(&cdns->otg_regs->sts);
>> + if (OTGSTS_OTG_NRDY(state) != 0) {
>> + dev_err(cdns->dev, "Cadence USB3 OTG device not ready\n");
>> + return -ENODEV;
>> + }
>> +
>> + ret = cdns3_drd_update_mode(cdns);
>> +
>> + return ret;
>> +}
>> +
>> +int cdns3_drd_exit(struct cdns3 *cdns)
>> +{
>> + return cdns3_drd_switch_host(cdns, 0);
>> +}
>> diff --git a/drivers/usb/cdns3/drd.h b/drivers/usb/cdns3/drd.h
>> new file mode 100644
>> index 000000000000..6a29cdcb492d
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/drd.h
>> @@ -0,0 +1,162 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Cadence USB3 DRD header file.
>> + *
>> + * Copyright (C) 2018 Cadence.
>> + *
>> + * Author: Pawel Laszczak <pawell@cadence.com>
>> + */
>> +#ifndef __LINUX_CDNS3_DRD
>> +#define __LINUX_CDNS3_DRD
>> +
>> +#include <linux/usb/otg.h>
>> +#include <linux/phy/phy.h>
>> +#include "core.h"
>> +
>> +/* DRD register interface for version v1. */
>> +struct cdns3_otg_regs {
>> + __le32 did;
>> + __le32 rid;
>> + __le32 capabilities;
>> + __le32 reserved1;
>> + __le32 cmd;
>> + __le32 sts;
>> + __le32 state;
>> + __le32 reserved2;
>> + __le32 ien;
>> + __le32 ivect;
>> + __le32 refclk;
>> + __le32 tmr;
>> + __le32 reserved3[4];
>> + __le32 simulate;
>> + __le32 override;
>> + __le32 susp_ctrl;
>> + __le32 reserved4;
>> + __le32 anasts;
>> + __le32 adp_ramp_time;
>> + __le32 ctrl1;
>> + __le32 ctrl2;
>> +};
>> +
>> +/* DRD register interface for version v0. */
>> +struct cdns3_otg_legacy_regs {
>> + __le32 cmd;
>> + __le32 sts;
>> + __le32 state;
>> + __le32 refclk;
>> + __le32 ien;
>> + __le32 ivect;
>> + __le32 reserved1[3];
>> + __le32 tmr;
>> + __le32 reserved2[2];
>> + __le32 version;
>> + __le32 capabilities;
>> + __le32 reserved3[2];
>> + __le32 simulate;
>> + __le32 reserved4[5];
>> + __le32 ctrl1;
>> +};
>> +
>> +/*
>> + * Common registers interface for both version of DRD.
>> + */
>> +struct cdns3_otg_common_regs {
>> + __le32 cmd;
>> + __le32 sts;
>> + __le32 state;
>> + __le32 different1;
>> + __le32 ien;
>> + __le32 ivect;
>> +};
>> +
>> +/* CDNS_RID - bitmasks */
>> +#define CDNS_RID(p) ((p) & GENMASK(15, 0))
>> +
>> +/* CDNS_VID - bitmasks */
>> +#define CDNS_DID(p) ((p) & GENMASK(31, 0))
>> +
>> +/* OTGCMD - bitmasks */
>> +/* "Request the bus for Device mode. */
>> +#define OTGCMD_DEV_BUS_REQ BIT(0)
>> +/* Request the bus for Host mode */
>> +#define OTGCMD_HOST_BUS_REQ BIT(1)
>> +/* Enable OTG mode. */
>> +#define OTGCMD_OTG_EN BIT(2)
>> +/* Disable OTG mode */
>> +#define OTGCMD_OTG_DIS BIT(3)
>> +/*"Configure OTG as A-Device. */
>> +#define OTGCMD_A_DEV_EN BIT(4)
>> +/*"Configure OTG as A-Device. */
>> +#define OTGCMD_A_DEV_DIS BIT(5)
>> +/* Drop the bus for Device mod e. */
>> +#define OTGCMD_DEV_BUS_DROP BIT(8)
>> +/* Drop the bus for Host mode*/
>> +#define OTGCMD_HOST_BUS_DROP BIT(9)
>> +/* Power Down USBSS-DEV. */
>> +#define OTGCMD_DEV_POWER_OFF BIT(11)
>> +/* Power Down CDNSXHCI. */
>> +#define OTGCMD_HOST_POWER_OFF BIT(12)
>> +
>> +/* OTGIEN - bitmasks */
>> +/* ID change interrupt enable */
>> +#define OTGIEN_ID_CHANGE_INT BIT(0)
>> +/* Vbusvalid fall detected interrupt enable.*/
>> +#define OTGIEN_VBUSVALID_RISE_INT BIT(4)
>> +/* Vbusvalid fall detected interrupt enable */
>> +#define OTGIEN_VBUSVALID_FALL_INT BIT(5)
>> +
>> +/* OTGSTS - bitmasks */
>> +/*
>> + * Current value of the ID pin. It is only valid when idpullup in
>> + * OTGCTRL1_TYPE register is set to '1'.
>> + */
>> +#define OTGSTS_ID_VALUE BIT(0)
>> +/* Current value of the vbus_valid */
>> +#define OTGSTS_VBUS_VALID BIT(1)
>> +/* Current value of the b_sess_vld */
>> +#define OTGSTS_SESSION_VALID BIT(2)
>> +/*Device mode is active*/
>> +#define OTGSTS_DEV_ACTIVE BIT(3)
>> +/* Host mode is active. */
>> +#define OTGSTS_HOST_ACTIVE BIT(4)
>> +/* OTG Controller not ready. */
>> +#define OTGSTS_OTG_NRDY_MASK BIT(11)
>> +#define OTGSTS_OTG_NRDY(p) ((p) & OTGSTS_OTG_NRDY_MASK)
>> +/*
>> + * Value of the strap pins.
>> + * 000 - no default configuration
>> + * 010 - Controller initiall configured as Host
>> + * 100 - Controller initially configured as Device
>> + */
>> +#define OTGSTS_STRAP(p) (((p) & GENMASK(14, 12)) >> 12)
>> +#define OTGSTS_STRAP_NO_DEFAULT_CFG 0x00
>> +#define OTGSTS_STRAP_HOST_OTG 0x01
>> +#define OTGSTS_STRAP_HOST 0x02
>> +#define OTGSTS_STRAP_GADGET 0x04
>> +/* Host mode is turned on. */
>> +#define OTGSTS_XHCI_READY BIT(26)
>> +/* "Device mode is turned on .*/
>> +#define OTGSTS_DEV_READY BIT(27)
>> +
>> +/* OTGSTATE- bitmasks */
>> +#define OTGSTATE_HOST_STATE_MASK GENMASK(5, 3)
>> +#define OTGSTATE_HOST_STATE_IDLE 0x0
>> +#define OTGSTATE_HOST_STATE_VBUS_FALL 0x7
>> +#define OTGSTATE_HOST_STATE(p) (((p) & OTGSTATE_HOST_STATE_MASK) >> 3)
>> +
>> +/* OTGREFCLK - bitmasks */
>> +#define OTGREFCLK_STB_CLK_SWITCH_EN BIT(31)
>> +
>> +/* OVERRIDE - bitmasks */
>> +#define OVERRIDE_IDPULLUP BIT(0)
>> +/* Only for CDNS3_CONTROLLER_V0 version */
>> +#define OVERRIDE_IDPULLUP_V0 BIT(24)
>> +
>> +int cdns3_is_host(struct cdns3 *cdns);
>> +int cdns3_is_device(struct cdns3 *cdns);
>> +int cdns3_get_id(struct cdns3 *cdns);
>> +int cdns3_drd_init(struct cdns3 *cdns);
>> +int cdns3_drd_exit(struct cdns3 *cdns);
>> +int cdns3_drd_update_mode(struct cdns3 *cdns);
>> +
>> +#endif /* __LINUX_CDNS3_DRD */
>> diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c
>> new file mode 100644
>> index 000000000000..2878982be1ec
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/ep0.c
>> @@ -0,0 +1,907 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Cadence USBSS DRD Driver - gadget side.
>> + *
>> + * Copyright (C) 2018 Cadence Design Systems.
>> + * Copyright (C) 2017-2018 NXP
>> + *
>> + * Authors: Pawel Jez <pjez@cadence.com>,
>> + * Pawel Laszczak <pawell@cadence.com>
>> + * Peter Chen <peter.chen@nxp.com>
>> + */
>> +
>> +#include <linux/usb/composite.h>
>> +
>> +#include "gadget.h"
>> +#include "trace.h"
>> +
>> +static struct usb_endpoint_descriptor cdns3_gadget_ep0_desc = {
>> + .bLength = USB_DT_ENDPOINT_SIZE,
>> + .bDescriptorType = USB_DT_ENDPOINT,
>> + .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
>> +};
>> +
>> +/**
>> + * cdns3_ep0_run_transfer - Do transfer on default endpoint hardware
>> + * @priv_dev: extended gadget object
>> + * @dma_addr: physical address where data is/will be stored
>> + * @length: data length
>> + * @erdy: set it to 1 when ERDY packet should be sent -
>> + * exit from flow control state
>> + */
>> +static void cdns3_ep0_run_transfer(struct cdns3_device *priv_dev,
>> + dma_addr_t dma_addr,
>> + unsigned int length, int erdy)
>> +{
>> + struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
>> + struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
>> +
>> + priv_ep->trb_pool->buffer = TRB_BUFFER(dma_addr);
>> + priv_ep->trb_pool->length = TRB_LEN(length);
>> + priv_ep->trb_pool->control = TRB_CYCLE | TRB_IOC | TRB_TYPE(TRB_NORMAL);
>> +
>> + trace_cdns3_prepare_trb(priv_ep, priv_ep->trb_pool);
>> +
>> + cdns3_select_ep(priv_dev, priv_dev->ep0_data_dir);
>> +
>> + writel(EP_STS_TRBERR, &regs->ep_sts);
>> + writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma), &regs->ep_traddr);
>> + trace_cdns3_doorbell_ep0(priv_dev->ep0_data_dir ? "ep0in" : "ep0out",
>> + readl(&regs->ep_traddr));
>> +
>> + /* TRB should be prepared before starting transfer */
>> + writel(EP_CMD_DRDY, &regs->ep_cmd);
>> +
>> + if (erdy)
>> + writel(EP_CMD_ERDY, &priv_dev->regs->ep_cmd);
>> +}
>> +
>> +/**
>> + * cdns3_ep0_delegate_req - Returns status of handling setup packet
>> + * Setup is handled by gadget driver
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + *
>> + * Returns zero on success or negative value on failure
>> + */
>> +static int cdns3_ep0_delegate_req(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl_req)
>> +{
>> + int ret;
>> +
>> + spin_unlock(&priv_dev->lock);
>> + priv_dev->setup_pending = 1;
>> + ret = priv_dev->gadget_driver->setup(&priv_dev->gadget, ctrl_req);
>> + priv_dev->setup_pending = 0;
>> + spin_lock(&priv_dev->lock);
>> + return ret;
>> +}
>> +
>> +static void cdns3_prepare_setup_packet(struct cdns3_device *priv_dev)
>> +{
>> + priv_dev->ep0_data_dir = 0;
>> + priv_dev->ep0_stage = CDNS3_SETUP_STAGE;
>> + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma,
>> + sizeof(struct usb_ctrlrequest), 0);
>> +}
>> +
>> +static void cdns3_ep0_complete_setup(struct cdns3_device *priv_dev,
>> + u8 send_stall, u8 send_erdy)
>> +{
>> + struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
>> + struct usb_request *request;
>> +
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> + if (request)
>> + list_del_init(&request->list);
>> +
>> + if (send_stall) {
>> + cdns3_dbg(priv_ep->cdns3_dev, "STALL for ep0\n");
>> + /* set_stall on ep0 */
>> + cdns3_select_ep(priv_dev, 0x00);
>> + writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd);
>> + } else {
>> + cdns3_prepare_setup_packet(priv_dev);
>> + }
>> +
>> + priv_dev->ep0_stage = CDNS3_SETUP_STAGE;
>> + writel((send_erdy ? EP_CMD_ERDY : 0) | EP_CMD_REQ_CMPL,
>> + &priv_dev->regs->ep_cmd);
>> +}
>> +
>> +/**
>> + * cdns3_req_ep0_set_configuration - Handling of SET_CONFIG standard USB request
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + *
>> + * Returns 0 if success, USB_GADGET_DELAYED_STATUS on deferred status stage,
>> + * error code on error
>> + */
>> +static int cdns3_req_ep0_set_configuration(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl_req)
>> +{
>> + enum usb_device_state device_state = priv_dev->gadget.state;
>> + struct cdns3_endpoint *priv_ep;
>> + u32 config = le16_to_cpu(ctrl_req->wValue);
>> + int result = 0;
>> + int i;
>> +
>> + switch (device_state) {
>> + case USB_STATE_ADDRESS:
>> + /* Configure non-control EPs */
>> + for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
>> + priv_ep = priv_dev->eps[i];
>> + if (!priv_ep)
>> + continue;
>> +
>> + if (priv_ep->flags & EP_CLAIMED)
>> + cdns3_ep_config(priv_ep);
>> + }
>> +
>> + result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
>> +
>> + if (result)
>> + return result;
>> +
>> + if (config) {
>> + cdns3_set_hw_configuration(priv_dev);
>> + } else {
>> + cdns3_hw_reset_eps_config(priv_dev);
>> + usb_gadget_set_state(&priv_dev->gadget,
>> + USB_STATE_ADDRESS);
>> + }
>> + break;
>> + case USB_STATE_CONFIGURED:
>> + result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
>> +
>> + if (!config && !result) {
>> + cdns3_hw_reset_eps_config(priv_dev);
>> + usb_gadget_set_state(&priv_dev->gadget,
>> + USB_STATE_ADDRESS);
>> + }
>> + break;
>> + default:
>> + result = -EINVAL;
>> + }
>> +
>> + return result;
>> +}
>> +
>> +/**
>> + * cdns3_req_ep0_set_address - Handling of SET_ADDRESS standard USB request
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + *
>> + * Returns 0 if success, error code on error
>> + */
>> +static int cdns3_req_ep0_set_address(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl_req)
>> +{
>> + enum usb_device_state device_state = priv_dev->gadget.state;
>> + u32 reg;
>> + u32 addr;
>> +
>> + addr = le16_to_cpu(ctrl_req->wValue);
>> +
>> + if (addr > USB_DEVICE_MAX_ADDRESS) {
>> + dev_err(priv_dev->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(priv_dev->dev,
>> + "can't set_address from configured state\n");
>> + return -EINVAL;
>> + }
>> +
>> + reg = readl(&priv_dev->regs->usb_cmd);
>> +
>> + writel(reg | USB_CMD_FADDR(addr) | USB_CMD_SET_ADDR,
>> + &priv_dev->regs->usb_cmd);
>> +
>> + usb_gadget_set_state(&priv_dev->gadget,
>> + (addr ? USB_STATE_ADDRESS : USB_STATE_DEFAULT));
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_req_ep0_get_status - Handling of GET_STATUS standard USB request
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + *
>> + * Returns 0 if success, error code on error
>> + */
>> +static int cdns3_req_ep0_get_status(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl)
>> +{
>> + __le16 *response_pkt;
>> + u16 usb_status = 0;
>> + u32 recip;
>> + u32 reg;
>> +
>> + recip = ctrl->bRequestType & USB_RECIP_MASK;
>> +
>> + switch (recip) {
>> + case USB_RECIP_DEVICE:
>> + /* self powered */
>> + if (priv_dev->is_selfpowered)
>> + usb_status = BIT(USB_DEVICE_SELF_POWERED);
>> +
>> + if (priv_dev->wake_up_flag)
>> + usb_status |= BIT(USB_DEVICE_REMOTE_WAKEUP);
>> +
>> + if (priv_dev->gadget.speed != USB_SPEED_SUPER)
>> + break;
>> +
>> + reg = readl(&priv_dev->regs->usb_sts);
>> +
>> + if (priv_dev->u1_allowed)
>> + usb_status |= BIT(USB_DEV_STAT_U1_ENABLED);
>> +
>> + if (priv_dev->u2_allowed)
>> + usb_status |= BIT(USB_DEV_STAT_U2_ENABLED);
>> +
>> + break;
>> + case USB_RECIP_INTERFACE:
>> + return cdns3_ep0_delegate_req(priv_dev, ctrl);
>> + case USB_RECIP_ENDPOINT:
>> + /* check if endpoint is stalled */
>> + cdns3_select_ep(priv_dev, ctrl->wIndex);
>> + if (EP_STS_STALL(readl(&priv_dev->regs->ep_sts)))
>> + usb_status = BIT(USB_ENDPOINT_HALT);
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + response_pkt = (__le16 *)priv_dev->setup_buf;
>> + *response_pkt = cpu_to_le16(usb_status);
>> +
>> + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma,
>> + sizeof(*response_pkt), 1);
>> + return 0;
>> +}
>> +
>> +static int cdns3_ep0_feature_handle_device(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl,
>> + int set)
>> +{
>> + enum usb_device_state state;
>> + enum usb_device_speed speed;
>> + int ret = 0;
>> + u32 wValue;
>> + u32 wIndex;
>> + u16 tmode;
>> +
>> + wValue = le16_to_cpu(ctrl->wValue);
>> + wIndex = le16_to_cpu(ctrl->wIndex);
>> + state = priv_dev->gadget.state;
>> + speed = priv_dev->gadget.speed;
>> +
>> + switch (ctrl->wValue) {
>> + case USB_DEVICE_REMOTE_WAKEUP:
>> + priv_dev->wake_up_flag = !!set;
>> + break;
>> + case USB_DEVICE_U1_ENABLE:
>> + if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER)
>> + return -EINVAL;
>> +
>> + priv_dev->u1_allowed = !!set;
>> + break;
>> + case USB_DEVICE_U2_ENABLE:
>> + if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER)
>> + return -EINVAL;
>> +
>> + priv_dev->u2_allowed = !!set;
>> + break;
>> + case USB_DEVICE_LTM_ENABLE:
>> + ret = -EINVAL;
>> + 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;
>> +
>> + switch (tmode >> 8) {
>> + case TEST_J:
>> + case TEST_K:
>> + case TEST_SE0_NAK:
>> + case TEST_PACKET:
>> + cdns3_ep0_complete_setup(priv_dev, 0, 1);
>> + /**
>> + * Little delay to give the controller some time
>> + * for sending status stage.
>> + * This time should be less then 3ms.
>> + */
>> + usleep_range(1000, 2000);
>> + cdns3_set_register_bit(&priv_dev->regs->usb_cmd,
>> + USB_CMD_STMODE |
>> + USB_STS_TMODE_SEL(tmode - 1));
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + }
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int cdns3_ep0_feature_handle_intf(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl,
>> + int set)
>> +{
>> + u32 wValue;
>> + int ret = 0;
>> +
>> + wValue = le16_to_cpu(ctrl->wValue);
>> +
>> + switch (wValue) {
>> + case USB_INTRF_FUNC_SUSPEND:
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int cdns3_ep0_feature_handle_endpoint(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl,
>> + int set)
>> +{
>> + struct cdns3_endpoint *priv_ep;
>> + int ret = 0;
>> + u8 index;
>> +
>> + if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
>> + return -EINVAL;
>> +
>> + if (!(ctrl->wIndex & ~USB_DIR_IN))
>> + return 0;
>> +
>> + index = cdns3_ep_addr_to_index(ctrl->wIndex);
>> + priv_ep = priv_dev->eps[index];
>> +
>> + cdns3_select_ep(priv_dev, ctrl->wIndex);
>> +
>> + if (set) {
>> + cdns3_dbg(priv_ep->cdns3_dev, "Stall endpoint %s\n",
>> + priv_ep->name);
>> + writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd);
>> + priv_ep->flags |= EP_STALL;
>> + } else {
>> + struct usb_request *request;
>> +
>> + if (priv_dev->eps[index]->flags & EP_WEDGE) {
>> + cdns3_select_ep(priv_dev, 0x00);
>> + return 0;
>> + }
>> +
>> + cdns3_dbg(priv_ep->cdns3_dev, "Clear Stalled endpoint %s\n",
>> + priv_ep->name);
>> +
>> + writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
>> +
>> + /* wait for EPRST cleared */
>> + ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
>> + EP_CMD_EPRST, 0, 100);
>> + if (ret)
>> + return -EINVAL;
>> +
>> + priv_ep->flags &= ~EP_STALL;
>> +
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> + if (request) {
>> + cdns3_dbg(priv_ep->cdns3_dev, "Resume transfer for %s\n",
>> + priv_ep->name);
>> +
>> + cdns3_rearm_transfer(priv_ep, 1);
>> + }
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_req_ep0_handle_feature -
>> + * Handling of GET/SET_FEATURE standard USB request
>> + *
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + * @set: must be set to 1 for SET_FEATURE request
>> + *
>> + * Returns 0 if success, error code on error
>> + */
>> +static int cdns3_req_ep0_handle_feature(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl,
>> + int set)
>> +{
>> + int ret = 0;
>> + u32 recip;
>> +
>> + recip = ctrl->bRequestType & USB_RECIP_MASK;
>> +
>> + switch (recip) {
>> + case USB_RECIP_DEVICE:
>> + ret = cdns3_ep0_feature_handle_device(priv_dev, ctrl, set);
>> + break;
>> + case USB_RECIP_INTERFACE:
>> + ret = cdns3_ep0_feature_handle_intf(priv_dev, ctrl, set);
>> + break;
>> + case USB_RECIP_ENDPOINT:
>> + ret = cdns3_ep0_feature_handle_endpoint(priv_dev, ctrl, set);
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_req_ep0_set_sel - Handling of SET_SEL standard USB request
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + *
>> + * Returns 0 if success, error code on error
>> + */
>> +static int cdns3_req_ep0_set_sel(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl_req)
>> +{
>> + if (priv_dev->gadget.state < USB_STATE_ADDRESS)
>> + return -EINVAL;
>> +
>> + if (ctrl_req->wLength != 6) {
>> + dev_err(priv_dev->dev, "Set SEL should be 6 bytes, got %d\n",
>> + ctrl_req->wLength);
>> + return -EINVAL;
>> + }
>> +
>> + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, 6, 1);
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_req_ep0_set_isoch_delay -
>> + * Handling of GET_ISOCH_DELAY standard USB request
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + *
>> + * Returns 0 if success, error code on error
>> + */
>> +static int cdns3_req_ep0_set_isoch_delay(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl_req)
>> +{
>> + if (ctrl_req->wIndex || ctrl_req->wLength)
>> + return -EINVAL;
>> +
>> + priv_dev->isoch_delay = ctrl_req->wValue;
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_ep0_standard_request - Handling standard USB requests
>> + * @priv_dev: extended gadget object
>> + * @ctrl_req: pointer to received setup packet
>> + *
>> + * Returns 0 if success, error code on error
>> + */
>> +static int cdns3_ep0_standard_request(struct cdns3_device *priv_dev,
>> + struct usb_ctrlrequest *ctrl_req)
>> +{
>> + int ret;
>> +
>> + switch (ctrl_req->bRequest) {
>> + case USB_REQ_SET_ADDRESS:
>> + ret = cdns3_req_ep0_set_address(priv_dev, ctrl_req);
>> + break;
>> + case USB_REQ_SET_CONFIGURATION:
>> + ret = cdns3_req_ep0_set_configuration(priv_dev, ctrl_req);
>> + break;
>> + case USB_REQ_GET_STATUS:
>> + ret = cdns3_req_ep0_get_status(priv_dev, ctrl_req);
>> + break;
>> + case USB_REQ_CLEAR_FEATURE:
>> + ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 0);
>> + break;
>> + case USB_REQ_SET_FEATURE:
>> + ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 1);
>> + break;
>> + case USB_REQ_SET_SEL:
>> + ret = cdns3_req_ep0_set_sel(priv_dev, ctrl_req);
>> + break;
>> + case USB_REQ_SET_ISOCH_DELAY:
>> + ret = cdns3_req_ep0_set_isoch_delay(priv_dev, ctrl_req);
>> + break;
>> + default:
>> + ret = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
>> + break;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static void __pending_setup_status_handler(struct cdns3_device *priv_dev)
>> +{
>> + struct usb_request *request = priv_dev->pending_status_request;
>> +
>> + if (priv_dev->status_completion_no_call && request &&
>> + request->complete) {
>> + request->complete(&priv_dev->eps[0]->endpoint, request);
>> + priv_dev->status_completion_no_call = 0;
>> + }
>> +}
>> +
>> +void cdns3_pending_setup_status_handler(struct work_struct *work)
>> +{
>> + struct cdns3_device *priv_dev = container_of(work, struct cdns3_device,
>> + pending_status_wq);
>> + unsigned long flags;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> + __pending_setup_status_handler(priv_dev);
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_giveback - call struct usb_request's ->complete callback
>> + * @priv_ep: The endpoint to whom the request belongs to
>> + * @priv_req: The request we're giving back
>> + * @status: completion code for the request
>> + *
>> + * Must be called with controller's lock held and interrupts disabled. This
>> + * function will unmap @req and call its ->complete() callback to notify upper
>> + * layers that it has completed.
>> + */
>> +
>> +void cdns3_gadget_ep0_giveback(struct cdns3_device *priv_dev,
>> + int status)
>> +{
>> + struct cdns3_endpoint *priv_ep;
>> + struct usb_request *request;
>> +
>> + priv_ep = priv_dev->eps[0];
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> +
>> + priv_ep->dir = priv_dev->ep0_data_dir;
>> + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), status);
>> +}
>> +
>> +/**
>> + * cdns3_ep0_setup_phase - Handling setup USB requests
>> + * @priv_dev: extended gadget object
>> + */
>> +static void cdns3_ep0_setup_phase(struct cdns3_device *priv_dev)
>> +{
>> + struct usb_ctrlrequest *ctrl = priv_dev->setup_buf;
>> + struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
>> + int result;
>> +
>> + priv_dev->ep0_data_dir = ctrl->bRequestType & USB_DIR_IN;
>> +
>> + trace_cdns3_ctrl_req(ctrl);
>> +
>> + if (!list_empty(&priv_ep->pending_req_list)) {
>> + struct usb_request *request;
>> +
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> + priv_ep->dir = priv_dev->ep0_data_dir;
>> + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
>> + -ECONNRESET);
>> + }
>> +
>> + if (le16_to_cpu(ctrl->wLength))
>> + priv_dev->ep0_stage = CDNS3_DATA_STAGE;
>> + else
>> + priv_dev->ep0_stage = CDNS3_STATUS_STAGE;
>> +
>> + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
>> + result = cdns3_ep0_standard_request(priv_dev, ctrl);
>> + else
>> + result = cdns3_ep0_delegate_req(priv_dev, ctrl);
>> +
>> + if (result == USB_GADGET_DELAYED_STATUS)
>> + return;
>> +
>> + if (result < 0)
>> + cdns3_ep0_complete_setup(priv_dev, 1, 1);
>> + else if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE)
>> + cdns3_ep0_complete_setup(priv_dev, 0, 1);
>> +}
>> +
>> +static void cdns3_transfer_completed(struct cdns3_device *priv_dev)
>> +{
>> + struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
>> +
>> + if (!list_empty(&priv_ep->pending_req_list)) {
>> + struct usb_request *request;
>> +
>> + trace_cdns3_complete_trb(priv_ep, priv_ep->trb_pool);
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> +
>> + request->actual =
>> + TRB_LEN(le32_to_cpu(priv_ep->trb_pool->length));
>> +
>> + priv_ep->dir = priv_dev->ep0_data_dir;
>> + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), 0);
>> + }
>> +
>> + cdns3_ep0_complete_setup(priv_dev, 0, 0);
>> +}
>> +
>> +/**
>> + * cdns3_check_new_setup - Check if controller receive new SETUP packet.
>> + * @priv_dev: extended gadget object
>> + *
>> + * The SETUP packet can be kept in on-chip memory or in system memory.
>> + */
>> +static bool cdns3_check_new_setup(struct cdns3_device *priv_dev)
>> +{
>> + u32 ep_sts_reg;
>> +
>> + cdns3_select_ep(priv_dev, 0 | USB_DIR_OUT);
>> + ep_sts_reg = readl(&priv_dev->regs->ep_sts);
>> +
>> + return !!(ep_sts_reg & (EP_STS_SETUP | EP_STS_STPWAIT));
>> +}
>> +
>> +/**
>> + * cdns3_check_ep0_interrupt_proceed - Processes interrupt related to endpoint 0
>> + * @priv_dev: extended gadget object
>> + * @dir: USB_DIR_IN for IN direction, USB_DIR_OUT for OUT direction
>> + */
>> +void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir)
>> +{
>> + u32 ep_sts_reg;
>> +
>> + cdns3_select_ep(priv_dev, dir);
>> +
>> + ep_sts_reg = readl(&priv_dev->regs->ep_sts);
>> + writel(ep_sts_reg, &priv_dev->regs->ep_sts);
>> +
>> + trace_cdns3_ep0_irq(priv_dev, ep_sts_reg);
>> +
>> + __pending_setup_status_handler(priv_dev);
>> +
>> + if ((ep_sts_reg & EP_STS_SETUP)) {
>> + cdns3_ep0_setup_phase(priv_dev);
>> + } else if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP)) {
>> + priv_dev->ep0_data_dir = dir;
>> + cdns3_transfer_completed(priv_dev);
>> + }
>> +
>> + if (ep_sts_reg & EP_STS_DESCMIS) {
>> + if (dir == 0 && !priv_dev->setup_pending)
>> + cdns3_prepare_setup_packet(priv_dev);
>> + }
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep0_enable
>> + * Function shouldn't be called by gadget driver,
>> + * endpoint 0 is allways active
>> + */
>> +static int cdns3_gadget_ep0_enable(struct usb_ep *ep,
>> + const struct usb_endpoint_descriptor *desc)
>> +{
>> + return -EINVAL;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep0_disable
>> + * Function shouldn't be called by gadget driver,
>> + * endpoint 0 is allways active
>> + */
>> +static int cdns3_gadget_ep0_disable(struct usb_ep *ep)
>> +{
>> + return -EINVAL;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep0_set_halt
>> + * @ep: pointer to endpoint zero object
>> + * @value: 1 for set stall, 0 for clear stall
>> + *
>> + * Returns 0
>> + */
>> +static int cdns3_gadget_ep0_set_halt(struct usb_ep *ep, int value)
>> +{
>> + /* TODO */
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep0_queue Transfer data on endpoint zero
>> + * @ep: pointer to endpoint zero object
>> + * @request: pointer to request object
>> + * @gfp_flags: gfp flags
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
>> + struct usb_request *request,
>> + gfp_t gfp_flags)
>> +{
>> + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + unsigned long flags;
>> + int erdy_sent = 0;
>> + int ret = 0;
>> +
>> + cdns3_dbg(priv_ep->cdns3_dev, "Queue to Ep0%s L: %d\n",
>> + priv_dev->ep0_data_dir ? "IN" : "OUT",
>> + request->length);
>> +
>> + /* cancel the request if controller receive new SETUP packet. */
>> + if (cdns3_check_new_setup(priv_dev))
>> + return -ECONNRESET;
>> +
>> + /* send STATUS stage. Should be called only for SET_CONFIGURATION */
>> + if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE) {
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> + cdns3_select_ep(priv_dev, 0x00);
>> +
>> + erdy_sent = !priv_dev->hw_configured_flag;
>> + cdns3_set_hw_configuration(priv_dev);
>> +
>> + if (!erdy_sent)
>> + cdns3_ep0_complete_setup(priv_dev, 0, 1);
>> +
>> + request->actual = 0;
>> + priv_dev->status_completion_no_call = true;
>> + priv_dev->pending_status_request = request;
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> +
>> + /*
>> + * Since there is no completion interrupt for status stage,
>> + * it needs to call ->completion in software after
>> + * ep0_queue is back.
>> + */
>> + queue_work(system_freezable_wq, &priv_dev->pending_status_wq);
>> + return 0;
>> + }
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> + if (!list_empty(&priv_ep->pending_req_list)) {
>> + dev_err(priv_dev->dev,
>> + "can't handle multiple requests for ep0\n");
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return -EBUSY;
>> + }
>> +
>> + ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request,
>> + priv_dev->ep0_data_dir);
>> + if (ret) {
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + dev_err(priv_dev->dev, "failed to map request\n");
>> + return -EINVAL;
>> + }
>> +
>> + request->status = -EINPROGRESS;
>> + list_add_tail(&request->list, &priv_ep->pending_req_list);
>> + cdns3_ep0_run_transfer(priv_dev, request->dma, request->length, 1);
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_set_wedge Set wedge on selected endpoint
>> + * @ep: endpoint object
>> + *
>> + * Returns 0
>> + */
>> +int cdns3_gadget_ep_set_wedge(struct usb_ep *ep)
>> +{
>> + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> +
>> + dev_dbg(priv_dev->dev, "Wedge for %s\n", ep->name);
>> + cdns3_gadget_ep_set_halt(ep, 1);
>> + priv_ep->flags |= EP_WEDGE;
>> +
>> + return 0;
>> +}
>> +
>> +const struct usb_ep_ops cdns3_gadget_ep0_ops = {
>> + .enable = cdns3_gadget_ep0_enable,
>> + .disable = cdns3_gadget_ep0_disable,
>> + .alloc_request = cdns3_gadget_ep_alloc_request,
>> + .free_request = cdns3_gadget_ep_free_request,
>> + .queue = cdns3_gadget_ep0_queue,
>> + .dequeue = cdns3_gadget_ep_dequeue,
>> + .set_halt = cdns3_gadget_ep0_set_halt,
>> + .set_wedge = cdns3_gadget_ep_set_wedge,
>> +};
>> +
>> +/**
>> + * cdns3_ep0_config - Configures default endpoint
>> + * @priv_dev: extended gadget object
>> + *
>> + * Functions sets parameters: maximal packet size and enables interrupts
>> + */
>> +void cdns3_ep0_config(struct cdns3_device *priv_dev)
>> +{
>> + struct cdns3_usb_regs __iomem *regs;
>> + struct cdns3_endpoint *priv_ep;
>> + u32 max_packet_size = 64;
>> +
>> + regs = priv_dev->regs;
>> +
>> + if (priv_dev->gadget.speed == USB_SPEED_SUPER)
>> + max_packet_size = 512;
>> +
>> + priv_ep = priv_dev->eps[0];
>> +
>> + if (!list_empty(&priv_ep->pending_req_list)) {
>> + struct usb_request *request;
>> +
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> + list_del_init(&request->list);
>> + }
>> +
>> + priv_dev->u1_allowed = 0;
>> + priv_dev->u2_allowed = 0;
>> +
>> + priv_dev->gadget.ep0->maxpacket = max_packet_size;
>> + cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(max_packet_size);
>> +
>> + /* init ep out */
>> + cdns3_select_ep(priv_dev, USB_DIR_OUT);
>> +
>> + writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
>> + &regs->ep_cfg);
>> +
>> + writel(EP_STS_EN_SETUPEN | EP_STS_EN_DESCMISEN | EP_STS_EN_TRBERREN,
>> + &regs->ep_sts_en);
>> +
>> + /* init ep in */
>> + cdns3_select_ep(priv_dev, USB_DIR_IN);
>> +
>> + writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
>> + &regs->ep_cfg);
>> +
>> + writel(EP_STS_EN_SETUPEN | EP_STS_EN_TRBERREN, &regs->ep_sts_en);
>> +
>> + cdns3_set_register_bit(&regs->usb_conf, USB_CONF_U1DS | USB_CONF_U2DS);
>> +}
>> +
>> +/**
>> + * cdns3_init_ep0 Initializes software endpoint 0 of gadget
>> + * @priv_dev: extended gadget object
>> + * @ep_priv: extended endpoint object
>> + *
>> + * Returns 0 on success else error code.
>> + */
>> +int cdns3_init_ep0(struct cdns3_device *priv_dev,
>> + struct cdns3_endpoint *priv_ep)
>> +{
>> + sprintf(priv_ep->name, "ep0");
>> +
>> + /* fill linux fields */
>> + priv_ep->endpoint.ops = &cdns3_gadget_ep0_ops;
>> + priv_ep->endpoint.maxburst = 1;
>> + usb_ep_set_maxpacket_limit(&priv_ep->endpoint,
>> + CDNS3_EP0_MAX_PACKET_LIMIT);
>> + priv_ep->endpoint.address = 0;
>> + priv_ep->endpoint.caps.type_control = 1;
>> + priv_ep->endpoint.caps.dir_in = 1;
>> + priv_ep->endpoint.caps.dir_out = 1;
>> + priv_ep->endpoint.name = priv_ep->name;
>> + priv_ep->endpoint.desc = &cdns3_gadget_ep0_desc;
>> + priv_dev->gadget.ep0 = &priv_ep->endpoint;
>> + priv_ep->type = USB_ENDPOINT_XFER_CONTROL;
>> +
>> + return cdns3_allocate_trb_pool(priv_ep);
>> +}
>> diff --git a/drivers/usb/cdns3/gadget-export.h b/drivers/usb/cdns3/gadget-export.h
>> new file mode 100644
>> index 000000000000..577469eee961
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/gadget-export.h
>> @@ -0,0 +1,28 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Cadence USBSS DRD Driver - Gadget Export APIs.
>> + *
>> + * Copyright (C) 2017 NXP
>> + * Copyright (C) 2017-2018 NXP
>> + *
>> + * Authors: Peter Chen <peter.chen@nxp.com>
>> + */
>> +#ifndef __LINUX_CDNS3_GADGET_EXPORT
>> +#define __LINUX_CDNS3_GADGET_EXPORT
>> +
>> +#ifdef CONFIG_USB_CDNS3_GADGET
>> +
>> +int cdns3_gadget_init(struct cdns3 *cdns);
>> +void cdns3_gadget_exit(struct cdns3 *cdns);
>> +#else
>> +
>> +static inline int cdns3_gadget_init(struct cdns3 *cdns)
>> +{
>> + return -ENXIO;
>> +}
>> +
>> +static inline void cdns3_gadget_exit(struct cdns3 *cdns) { }
>> +
>> +#endif
>> +
>> +#endif /* __LINUX_CDNS3_GADGET_EXPORT */
>> diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
>> new file mode 100644
>> index 000000000000..7f7f24ee3c4b
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/gadget.c
>> @@ -0,0 +1,2003 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Cadence USBSS DRD Driver - gadget side.
>> + *
>> + * Copyright (C) 2018 Cadence Design Systems.
>> + * Copyright (C) 2017-2018 NXP
>> + *
>> + * Authors: Pawel Jez <pjez@cadence.com>,
>> + * Pawel Laszczak <pawell@cadence.com>
>> + * Peter Chen <peter.chen@nxp.com>
>> + */
>> +
>> +/*
>> + * Work around 1:
>> + * At some situations, the controller may get stale data address in TRB
>> + * at below sequences:
>> + * 1. Controller read TRB includes data address
>> + * 2. Software updates TRBs includes data address and Cycle bit
>> + * 3. Controller read TRB which includes Cycle bit
>> + * 4. DMA run with stale data address
>> +
>> + * To fix this problem, we need to make the first TRB in TD as invalid TRB when
>> + * the TD which the DMA is handling close to the TRB we are adding,
>> + * and make this TRB as valid at TRBERR interrupt. The condition for
>> + * this TRB is:
>> + *
>> + * If (((Dequeue Ptr (i.e. EP_TRADDR) == Enqueue Ptr-1) or
>> + * (Dequeue Ptr (i.e. EP_TRADDR) == Enqueue Ptr))
>> + * and (DRBL==1 and (not EP0)))
>> + */
>> +
>> +#include <linux/dma-mapping.h>
>> +#include <linux/usb/gadget.h>
>> +#include <linux/module.h>
>> +
>> +#include "core.h"
>> +#include "gadget-export.h"
>> +#include "gadget.h"
>> +#include "trace.h"
>> +
>> +static int __cdns3_gadget_ep_queue(struct usb_ep *ep,
>> + struct usb_request *request,
>> + gfp_t gfp_flags);
>> +
>> +/**
>> + * cdns3_handshake - spin reading until handshake completes or fails
>> + * @ptr: address of device controller register to be read
>> + * @mask: bits to look at in result of read
>> + * @done: value of those bits when handshake succeeds
>> + * @usec: timeout in microseconds
>> + *
>> + * Returns negative errno, or zero on success
>> + *
>> + * Success happens when the "mask" bits have the specified value (hardware
>> + * handshake done). There are two failure modes: "usec" have passed (major
>> + * hardware flakeout), or the register reads as all-ones (hardware removed).
>> + */
>> +int cdns3_handshake(void __iomem *ptr, u32 mask, u32 done, int usec)
>> +{
>> + u32 result;
>> +
>> + do {
>> + result = readl(ptr);
>> + if (result == ~(u32)0) /* card removed */
>> + return -ENODEV;
>> + result &= mask;
>> + if (result == done)
>> + return 0;
>> + udelay(1);
>> + usec--;
>> + } while (usec > 0);
>> + return -ETIMEDOUT;
>> +}
>> +
>> +/**
>> + * cdns3_set_register_bit - set bit in given register.
>> + * @ptr: address of device controller register to be read and changed
>> + * @mask: bits requested to set
>> + */
>> +void cdns3_set_register_bit(void __iomem *ptr, u32 mask)
>> +{
>> + mask = readl(ptr) | mask;
>> + writel(mask, ptr);
>> +}
>> +
>> +/**
>> + * cdns3_ep_addr_to_index - Macro converts endpoint address to
>> + * index of endpoint object in cdns3_device.eps[] container
>> + * @ep_addr: endpoint address for which endpoint object is required
>> + *
>> + */
>> +u8 cdns3_ep_addr_to_index(u8 ep_addr)
>> +{
>> + return (((ep_addr & 0x7F)) + ((ep_addr & USB_DIR_IN) ? 16 : 0));
>> +}
>> +
>> +/**
>> + * cdns3_next_request - returns next request from list
>> + * @list: list containing requests
>> + *
>> + * Returns request or NULL if no requests in list
>> + */
>> +struct usb_request *cdns3_next_request(struct list_head *list)
>> +{
>> + return list_first_entry_or_null(list, struct usb_request, list);
>> +}
>> +
>> +/**
>> + * select_ep - selects endpoint
>> + * @priv_dev: extended gadget object
>> + * @ep: endpoint address
>> + */
>> +void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep)
>> +{
>> + if (priv_dev->selected_ep == ep)
>> + return;
>> +
>> + priv_dev->selected_ep = ep;
>> + writel(ep, &priv_dev->regs->ep_sel);
>> +}
>> +
>> +dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
>> + struct cdns3_trb *trb)
>> +{
>> + u32 offset = (char *)trb - (char *)priv_ep->trb_pool;
>> +
>> + return priv_ep->trb_pool_dma + offset;
>> +}
>> +
>> +int cdns3_ring_size(struct cdns3_endpoint *priv_ep)
>> +{
>> + switch (priv_ep->type) {
>> + case USB_ENDPOINT_XFER_ISOC:
>> + return TRB_ISO_RING_SIZE;
>> + case USB_ENDPOINT_XFER_CONTROL:
>> + return TRB_CTRL_RING_SIZE;
>> + default:
>> + return TRB_RING_SIZE;
>> + }
>> +}
>> +
>> +/**
>> + * cdns3_allocate_trb_pool - Allocates TRB's pool for selected endpoint
>> + * @priv_ep: endpoint object
>> + *
>> + * Function will return 0 on success or -ENOMEM on allocation error
>> + */
>> +int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + int ring_size = cdns3_ring_size(priv_ep);
>> + struct cdns3_trb *link_trb;
>> +
>> + if (!priv_ep->trb_pool) {
>> + priv_ep->trb_pool = dma_zalloc_coherent(priv_dev->sysdev,
>> + ring_size,
>> + &priv_ep->trb_pool_dma,
>> + GFP_DMA);
>> + if (!priv_ep->trb_pool)
>> + return -ENOMEM;
>> + } else {
>> + memset(priv_ep->trb_pool, 0, ring_size);
>> + }
>> +
>> + if (!priv_ep->num)
>> + return 0;
>> +
>> + if (!priv_ep->aligned_buff) {
>> + void *buff = dma_alloc_coherent(priv_dev->sysdev,
>> + CDNS3_ALIGNED_BUF_SIZE,
>> + &priv_ep->aligned_dma_addr,
>> + GFP_DMA);
>> +
>> + priv_ep->aligned_buff = buff;
>> + if (!priv_ep->aligned_buff) {
>> + dma_free_coherent(priv_dev->sysdev,
>> + ring_size,
>> + priv_ep->trb_pool,
>> + priv_ep->trb_pool_dma);
>> + priv_ep->trb_pool = NULL;
>> +
>> + return -ENOMEM;
>> + }
>> + }
>> +
>> + priv_ep->num_trbs = ring_size / TRB_SIZE;
>> + /* Initialize the last TRB as Link TRB */
>> + link_trb = (priv_ep->trb_pool + (priv_ep->num_trbs - 1));
>> + link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma);
>> + link_trb->control = TRB_CYCLE | TRB_TYPE(TRB_LINK) |
>> + TRB_CHAIN | TRB_TOGGLE;
>> +
>> + return 0;
>> +}
>> +
>> +static void cdns3_free_trb_pool(struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> +
>> + if (priv_ep->trb_pool) {
>> + dma_free_coherent(priv_dev->sysdev,
>> + cdns3_ring_size(priv_ep),
>> + priv_ep->trb_pool, priv_ep->trb_pool_dma);
>> + priv_ep->trb_pool = NULL;
>> + }
>> +
>> + if (priv_ep->aligned_buff) {
>> + dma_free_coherent(priv_dev->sysdev, CDNS3_ALIGNED_BUF_SIZE,
>> + priv_ep->aligned_buff,
>> + priv_ep->aligned_dma_addr);
>> + priv_ep->aligned_buff = NULL;
>> + }
>> +}
>> +
>> +/**
>> + * cdns3_data_flush - flush data at onchip buffer
>> + * @priv_ep: endpoint object
>> + *
>> + * Endpoint must be selected before call to this function
>> + *
>> + * Returns zero on success or negative value on failure
>> + */
>> +static int cdns3_data_flush(struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> +
>> + writel(EP_CMD_DFLUSH, &priv_dev->regs->ep_cmd);
>> +
>> + /* wait for DFLUSH cleared */
>> + return cdns3_handshake(&priv_dev->regs->ep_cmd, EP_CMD_DFLUSH, 0, 100);
>> +}
>> +
>> +/**
>> + * cdns3_ep_stall_flush - Stalls and flushes selected endpoint
>> + * @priv_ep: endpoint object
>> + *
>> + * Endpoint must be selected before call to this function
>> + */
>> +static void cdns3_ep_stall_flush(struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> +
>> + cdns3_dbg(priv_ep->cdns3_dev, "Stall & flush endpoint %s\n",
>> + priv_ep->name);
>> +
>> + writel(EP_CMD_DFLUSH | EP_CMD_ERDY | EP_CMD_SSTALL,
>> + &priv_dev->regs->ep_cmd);
>> +
>> + /* wait for DFLUSH cleared */
>> + cdns3_handshake(&priv_dev->regs->ep_cmd, EP_CMD_DFLUSH, 0, 100);
>> + priv_ep->flags |= EP_STALL;
>> +}
>> +
>> +/**
>> + * cdns3_hw_reset_eps_config - reset endpoints configuration kept by controller.
>> + * @priv_dev: extended gadget object
>> + */
>> +void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev)
>> +{
>> + writel(USB_CONF_CFGRST, &priv_dev->regs->usb_conf);
>> +
>> + cdns3_allow_enable_l1(priv_dev, 0);
>> + priv_dev->hw_configured_flag = 0;
>> + priv_dev->onchip_mem_allocated_size = 0;
>> +}
>> +
>> +/**
>> + * cdns3_ep_inc_trb - increment a trb index.
>> + * @index: Pointer to the TRB index to increment.
>> + * @cs: Cycle state
>> + * @trb_in_seg: number of TRBs in segment
>> + *
>> + * The index should never point to the link TRB. After incrementing,
>> + * if it is point to the link TRB, wrap around to the beginning and revert
>> + * cycle state bit The
>> + * link TRB is always at the last TRB entry.
>> + */
>> +static void cdns3_ep_inc_trb(int *index, u8 *cs, int trb_in_seg)
>> +{
>> + (*index)++;
>> + if (*index == (trb_in_seg - 1)) {
>> + *index = 0;
>> + *cs ^= 1;
>> + }
>> +}
>> +
>> +/**
>> + * cdns3_ep_inc_enq - increment endpoint's enqueue pointer
>> + * @priv_ep: The endpoint whose enqueue pointer we're incrementing
>> + */
>> +static void cdns3_ep_inc_enq(struct cdns3_endpoint *priv_ep)
>> +{
>> + priv_ep->free_trbs--;
>> + cdns3_ep_inc_trb(&priv_ep->enqueue, &priv_ep->pcs, priv_ep->num_trbs);
>> +}
>> +
>> +/**
>> + * cdns3_ep_inc_deq - increment endpoint's dequeue pointer
>> + * @priv_ep: The endpoint whose dequeue pointer we're incrementing
>> + */
>> +static void cdns3_ep_inc_deq(struct cdns3_endpoint *priv_ep)
>> +{
>> + priv_ep->free_trbs++;
>> + cdns3_ep_inc_trb(&priv_ep->dequeue, &priv_ep->ccs, priv_ep->num_trbs);
>> +}
>> +
>> +void cdns3_move_deq_to_next_trb(struct cdns3_request *priv_req)
>> +{
>> + struct cdns3_endpoint *priv_ep = priv_req->priv_ep;
>> + int current_trb = priv_req->start_trb;
>> +
>> + while (current_trb != priv_req->end_trb) {
>> + cdns3_ep_inc_deq(priv_ep);
>> + current_trb = priv_ep->dequeue;
>> + }
>> +
>> + cdns3_ep_inc_deq(priv_ep);
>> +}
>> +
>> +/**
>> + * cdns3_allow_enable_l1 - enable/disable permits to transition to L1.
>> + * @priv_dev: Extended gadget object
>> + * @enable: Enable/disable permit to transition to L1.
>> + *
>> + * If bit USB_CONF_L1EN is set and device receive Extended Token packet,
>> + * then controller answer with ACK handshake.
>> + * If bit USB_CONF_L1DS is set and device receive Extended Token packet,
>> + * then controller answer with NYET handshake.
>> + */
>> +void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable)
>> +{
>> + if (enable)
>> + writel(USB_CONF_L1EN, &priv_dev->regs->usb_conf);
>> + else
>> + writel(USB_CONF_L1DS, &priv_dev->regs->usb_conf);
>> +}
>> +
>> +enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev)
>> +{
>> + u32 reg;
>> +
>> + reg = readl(&priv_dev->regs->usb_sts);
>> +
>> + if (DEV_SUPERSPEED(reg))
>> + return USB_SPEED_SUPER;
>> + else if (DEV_HIGHSPEED(reg))
>> + return USB_SPEED_HIGH;
>> + else if (DEV_FULLSPEED(reg))
>> + return USB_SPEED_FULL;
>> + else if (DEV_LOWSPEED(reg))
>> + return USB_SPEED_LOW;
>> + return USB_SPEED_UNKNOWN;
>> +}
>> +
>> +/**
>> + * cdns3_start_all_request - add to ring all request not started
>> + * @priv_dev: Extended gadget object
>> + * @priv_ep: The endpoint for whom request will be started.
>> + *
>> + * Returns return ENOMEM if transfer ring i not enough TRBs to start
>> + * all requests.
>> + */
>> +static int cdns3_start_all_request(struct cdns3_device *priv_dev,
>> + struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_request *priv_req;
>> + struct usb_request *request;
>> + int ret = 0;
>> +
>> + while (!list_empty(&priv_ep->deferred_req_list)) {
>> + request = cdns3_next_request(&priv_ep->deferred_req_list);
>> + priv_req = to_cdns3_request(request);
>> +
>> + ret = cdns3_ep_run_transfer(priv_ep, request);
>> + if (ret)
>> + return ret;
>> +
>> + list_del(&request->list);
>> + list_add_tail(&request->list,
>> + &priv_ep->pending_req_list);
>> + }
>> +
>> + priv_ep->flags &= ~EP_RING_FULL;
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_giveback - call struct usb_request's ->complete callback
>> + * @priv_ep: The endpoint to whom the request belongs to
>> + * @priv_req: The request we're giving back
>> + * @status: completion code for the request
>> + *
>> + * Must be called with controller's lock held and interrupts disabled. This
>> + * function will unmap @req and call its ->complete() callback to notify upper
>> + * layers that it has completed.
>> + */
>> +void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
>> + struct cdns3_request *priv_req,
>> + int status)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + struct usb_request *request = &priv_req->request;
>> +
>> + list_del_init(&request->list);
>> +
>> + if (request->status == -EINPROGRESS)
>> + request->status = status;
>> +
>> + usb_gadget_unmap_request_by_dev(priv_dev->sysdev, request,
>> + priv_ep->dir);
>> +
>> + priv_req->flags &= ~REQUEST_PENDING;
>> + trace_cdns3_gadget_giveback(priv_req);
>> +
>> + /* Start all not pending request */
>> + if (priv_ep->flags & EP_RING_FULL)
>> + cdns3_start_all_request(priv_dev, priv_ep);
>> +
>> + if (request->complete) {
>> + spin_unlock(&priv_dev->lock);
>> + usb_gadget_giveback_request(&priv_ep->endpoint,
>> + request);
>> + spin_lock(&priv_dev->lock);
>> + }
>> +
>> + if (request->buf == priv_dev->zlp_buf)
>> + cdns3_gadget_ep_free_request(&priv_ep->endpoint, request);
>> +}
>> +
>> +/**
>> + * cdns3_ep_run_transfer - start transfer on no-default endpoint hardware
>> + * @priv_ep: endpoint object
>> + *
>> + * Returns zero on success or negative value on failure
>> + */
>> +int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
>> + struct usb_request *request)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + struct cdns3_request *priv_req;
>> + struct cdns3_trb *trb;
>> + dma_addr_t trb_dma;
>> + int dma_index;
>> + int sg_iter = 0;
>> + u32 first_pcs;
>> + int num_trb;
>> + int address;
>> + u32 doorbell;
>> + int pcs;
>> +
>> + if (priv_ep->type == USB_ENDPOINT_XFER_ISOC)
>> + num_trb = priv_ep->interval;
>> + else
>> + num_trb = request->num_sgs ? request->num_sgs : 1;
>> +
>> + if (num_trb > priv_ep->free_trbs) {
>> + priv_ep->flags |= EP_RING_FULL;
>> + return -ENOBUFS;
>> + }
>> +
>> + priv_req = to_cdns3_request(request);
>> + address = priv_ep->endpoint.desc->bEndpointAddress;
>> +
>> + priv_ep->flags |= EP_PENDING_REQUEST;
>> + trb_dma = request->dma;
>> +
>> + /* must allocate buffer aligned to 8 */
>> + if ((request->dma % 8)) {
>> + if (request->length <= CDNS3_ALIGNED_BUF_SIZE) {
>> + memcpy(priv_ep->aligned_buff, request->buf,
>> + request->length);
>> + trb_dma = priv_ep->aligned_dma_addr;
>> + } else {
>> + return -ENOMEM;
>> + }
>> + }
>> +
>> + trb = priv_ep->trb_pool + priv_ep->enqueue;
>> + priv_req->start_trb = priv_ep->enqueue;
>> + priv_req->trb = trb;
>> +
>> + /* prepare ring */
>> + if ((priv_ep->enqueue + num_trb) >= (priv_ep->num_trbs - 1)) {
>> + /*updating C bt in Link TRB before starting DMA*/
>> + struct cdns3_trb *link_trb = priv_ep->trb_pool +
>> + (priv_ep->num_trbs - 1);
>> + link_trb->control = ((priv_ep->pcs) ? TRB_CYCLE : 0) |
>> + TRB_TYPE(TRB_LINK) | TRB_CHAIN |
>> + TRB_TOGGLE;
>> + }
>> +
>> + first_pcs = priv_ep->pcs ? TRB_CYCLE : 0;
>> +
>> + /* arm transfer on selected endpoint */
>> + cdns3_select_ep(priv_ep->cdns3_dev, address);
>> +
>> + doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
>> + dma_index = (readl(&priv_dev->regs->ep_traddr) -
>> + priv_ep->trb_pool_dma) / TRB_SIZE;
>> +
>> + if (!priv_ep->wa1_set) {
>> + if (doorbell &&
>> + ((priv_ep->enqueue == 0 &&
>> + dma_index >= GET_TRBS_PER_SEGMENT(priv_ep->type) - 2) ||
>> + dma_index == priv_ep->enqueue ||
>> + (dma_index == priv_ep->enqueue - 1))) {
>> + priv_ep->wa1_cycle_bit = first_pcs;
>> + priv_ep->wa1_set = 1;
>> + priv_ep->wa1_trb = trb;
>> + first_pcs ^= 0x1;
>> + cdns3_dbg(priv_dev, "WA1: deferred doorbel\n");
>> + }
>> + }
>> +
>> + do {
>> + /* fill TRB */
>> + trb->buffer = TRB_BUFFER(request->num_sgs == 0
>> + ? trb_dma : request->sg[sg_iter].dma_address);
>> +
>> + trb->length = TRB_BURST_LEN(16) |
>> + TRB_LEN(request->num_sgs == 0 ?
>> + request->length : request->sg[sg_iter].length);
>> +
>> + trb->control = TRB_TYPE(TRB_NORMAL);
>> + pcs = priv_ep->pcs ? TRB_CYCLE : 0;
>> +
>> + /*
>> + * first trb should be prepared as last to avoid processing
>> + * transfer to early
>> + */
>> + if (sg_iter != 0)
>> + trb->control |= pcs;
>> +
>> + if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir) {
>> + trb->control |= TRB_IOC | TRB_ISP;
>> + } else {
>> + /* for last element in TD or in SG list */
>> + if (sg_iter == (num_trb - 1) && sg_iter != 0)
>> + trb->control |= pcs | TRB_IOC | TRB_ISP;
>> + }
>> + ++sg_iter;
>> + priv_req->end_trb = priv_ep->enqueue;
>> + cdns3_ep_inc_enq(priv_ep);
>> + trb = priv_ep->trb_pool + priv_ep->enqueue;
>> + } while (sg_iter < num_trb);
>> +
>> + trb = priv_req->trb;
>> +
>> + priv_req->flags |= REQUEST_PENDING;
>> +
>> + /*
>> + * Memory barrier - cycle bit must be set before other filds in trb.
>> + */
>> + wmb();
>> +
>> + /* give the TD to the consumer*/
>> + if (sg_iter == 1)
>> + trb->control |= first_pcs | TRB_IOC | TRB_ISP;
>> + else
>> + trb->control |= first_pcs;
>> +
>> + trace_cdns3_prepare_trb(priv_ep, priv_req->trb);
>> +
>> + /*
>> + * Memory barrier - Cycle Bit must be set before trb->length and
>> + * trb->buffer fields.
>> + */
>> + wmb();
>> +
>> + /*
>> + * For DMULT mode we can set address to transfer ring only once after
>> + * enabling endpoint.
>> + */
>> + if (priv_ep->flags & EP_UPDATE_EP_TRBADDR) {
>> + writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma +
>> + priv_req->start_trb * TRB_SIZE),
>> + &priv_dev->regs->ep_traddr);
>> +
>> + cdns3_dbg(priv_ep->cdns3_dev, "Update ep_trbaddr for %s to %08x\n",
>> + priv_ep->name, readl(&priv_dev->regs->ep_traddr));
>> +
>> + priv_ep->flags &= ~EP_UPDATE_EP_TRBADDR;
>> + }
>> +
>> + if (!priv_ep->wa1_set && !(priv_ep->flags & EP_STALL)) {
>> + trace_cdns3_ring(priv_ep);
>> + /*clearing TRBERR and EP_STS_DESCMIS before seting DRDY*/
>> + writel(EP_STS_TRBERR | EP_STS_DESCMIS, &priv_dev->regs->ep_sts);
>> + writel(EP_CMD_DRDY, &priv_dev->regs->ep_cmd);
>> + trace_cdns3_doorbell_epx(priv_ep->name,
>> + readl(&priv_dev->regs->ep_traddr));
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +void cdns3_set_hw_configuration(struct cdns3_device *priv_dev)
>> +{
>> + struct cdns3_endpoint *priv_ep;
>> + struct usb_ep *ep;
>> + int result = 0;
>> +
>> + if (priv_dev->hw_configured_flag)
>> + return;
>> +
>> + writel(USB_CONF_CFGSET, &priv_dev->regs->usb_conf);
>> + writel(EP_CMD_ERDY | EP_CMD_REQ_CMPL, &priv_dev->regs->ep_cmd);
>> +
>> + cdns3_set_register_bit(&priv_dev->regs->usb_conf,
>> + USB_CONF_U1EN | USB_CONF_U2EN);
>> +
>> + /* wait until configuration set */
>> + result = cdns3_handshake(&priv_dev->regs->usb_sts,
>> + USB_STS_CFGSTS_MASK, 1, 100);
>> +
>> + priv_dev->hw_configured_flag = 1;
>> + cdns3_allow_enable_l1(priv_dev, 1);
>> +
>> + list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
>> + if (ep->enabled) {
>> + priv_ep = ep_to_cdns3_ep(ep);
>> + cdns3_start_all_request(priv_dev, priv_ep);
>> + }
>> + }
>> +}
>> +
>> +/**
>> + * cdns3_request_handled - check whether request has been handled by DMA
>> + *
>> + * @priv_ep: extended endpoint object.
>> + * @priv_req: request object for checking
>> + *
>> + * Endpoint must be selected before invoking this function.
>> + *
>> + * Returns false if request has not been handled by DMA, else returns true.
>> + *
>> + * SR - start ring
>> + * ER - end ring
>> + * DQ = priv_ep->dequeue - dequeue position
>> + * EQ = priv_ep->enqueue - enqueue position
>> + * ST = priv_req->start_trb - index of first TRB in transfer ring
>> + * ET = priv_req->end_trb - index of last TRB in transfer ring
>> + * CI = current_index - index of processed TRB by DMA.
>> + *
>> + * As first step, function checks if cycle bit for priv_req->start_trb is
>> + * correct.
>> + *
>> + * some rules:
>> + * 1. priv_ep->dequeue never exceed current_index.
>> + * 2 priv_ep->enqueue never exceed priv_ep->dequeue
>> + *
>> + * Then We can split recognition into two parts:
>> + * Case 1 - priv_ep->dequeue < current_index
>> + * SR ... EQ ... DQ ... CI ... ER
>> + * SR ... DQ ... CI ... EQ ... ER
>> + *
>> + * Request has been handled by DMA if ST and ET is between DQ and CI.
>> + *
>> + * Case 2 - priv_ep->dequeue > current_index
>> + * This situation take place when CI go through the LINK TRB at the end of
>> + * transfer ring.
>> + * SR ... CI ... EQ ... DQ ... ER
>> + *
>> + * Request has been handled by DMA if ET is less then CI or
>> + * ET is greater or equal DQ.
>> + */
>> +static bool cdns3_request_handled(struct cdns3_endpoint *priv_ep,
>> + struct cdns3_request *priv_req)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + struct cdns3_trb *trb = priv_req->trb;
>> + int current_index = 0;
>> + int handled = 0;
>> +
>> + current_index = (readl(&priv_dev->regs->ep_traddr) -
>> + priv_ep->trb_pool_dma) / TRB_SIZE;
>> +
>> + trb = &priv_ep->trb_pool[priv_req->start_trb];
>> +
>> + if ((trb->control & TRB_CYCLE) != priv_ep->ccs)
>> + goto finish;
>> +
>> + if (priv_ep->dequeue < current_index) {
>> + if ((current_index == (priv_ep->num_trbs - 1)) &&
>> + !priv_ep->dequeue)
>> + goto finish;
>> +
>> + if (priv_req->end_trb >= priv_ep->dequeue &&
>> + priv_req->end_trb < current_index)
>> + handled = 1;
>> + } else if (priv_ep->dequeue > current_index) {
>> + if (priv_req->end_trb < current_index ||
>> + priv_req->end_trb >= priv_ep->dequeue)
>> + handled = 1;
>> + }
>> +
>> +finish:
>> + trace_cdns3_request_handled(priv_req, current_index, handled);
>> +
>> + return handled;
>> +}
>> +
>> +static void cdns3_transfer_completed(struct cdns3_device *priv_dev,
>> + struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_request *priv_req;
>> + struct usb_request *request;
>> + struct cdns3_trb *trb;
>> +
>> + while (!list_empty(&priv_ep->pending_req_list)) {
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> + priv_req = to_cdns3_request(request);
>> +
>> + /* Re-select endpoint. It could be changed by other CPU during
>> + * handling usb_gadget_giveback_request.
>> + */
>> + cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
>> +
>> + if (!cdns3_request_handled(priv_ep, priv_req))
>> + return;
>> +
>> + if (request->dma % 8 && priv_ep->dir == USB_DIR_OUT)
>> + memcpy(request->buf, priv_ep->aligned_buff,
>> + request->length);
>> +
>> + trb = priv_ep->trb_pool + priv_ep->dequeue;
>> + trace_cdns3_complete_trb(priv_ep, trb);
>> +
>> + if (trb != priv_req->trb)
>> + dev_warn(priv_dev->dev,
>> + "request_trb=0x%p, queue_trb=0x%p\n",
>> + priv_req->trb, trb);
>> +
>> + request->actual = TRB_LEN(le32_to_cpu(trb->length));
>> + cdns3_move_deq_to_next_trb(priv_req);
>> + cdns3_gadget_giveback(priv_ep, priv_req, 0);
>> + }
>> + priv_ep->flags &= ~EP_PENDING_REQUEST;
>> +}
>> +
>> +void cdns3_wa1_restore_cycle_bit(struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> +
>> + /* Work around for stale data address in TRB*/
>> + if (priv_ep->wa1_set) {
>> + cdns3_dbg(priv_dev, "WA1: update cycle bit\n");
>> + priv_ep->wa1_set = 0;
>> + if (priv_ep->wa1_cycle_bit) {
>> + priv_ep->wa1_trb->control =
>> + priv_ep->wa1_trb->control | 0x1;
>> + } else {
>> + priv_ep->wa1_trb->control =
>> + priv_ep->wa1_trb->control & ~0x1;
>> + }
>> + }
>> +}
>> +
>> +void cdns3_rearm_transfer(struct cdns3_endpoint *priv_ep, u8 rearm)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> +
>> + cdns3_wa1_restore_cycle_bit(priv_ep);
>> +
>> + if (rearm) {
>> + trace_cdns3_ring(priv_ep);
>> +
>> + /* Cycle Bit must be updated before arming DMA. */
>> + wmb();
>> + writel(EP_CMD_DRDY, &priv_dev->regs->ep_cmd);
>> +
>> + trace_cdns3_doorbell_epx(priv_ep->name,
>> + readl(&priv_dev->regs->ep_traddr));
>> + }
>> +}
>> +
>> +/**
>> + * cdns3_check_ep_interrupt_proceed - Processes interrupt related to endpoint
>> + * @priv_ep: endpoint object
>> + *
>> + * Returns 0
>> + */
>> +static int cdns3_check_ep_interrupt_proceed(struct cdns3_endpoint *priv_ep)
>> +{
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + u32 ep_sts_reg;
>> +
>> + cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
>> +
>> + trace_cdns3_epx_irq(priv_dev, priv_ep);
>> +
>> + ep_sts_reg = readl(&priv_dev->regs->ep_sts);
>> + writel(ep_sts_reg, &priv_dev->regs->ep_sts);
>> +
>> + if (ep_sts_reg & EP_STS_TRBERR) {
>> + /*
>> + * For isochronous transfer driver completes request on
>> + * IOC or on TRBERR. IOC appears only when device receive
>> + * OUT data packet. If host disable stream or lost some packet
>> + * then the only way to finish all queued transfer is to do it
>> + * on TRBERR event.
>> + */
>> + if (priv_ep->type == USB_ENDPOINT_XFER_ISOC &&
>> + !priv_ep->wa1_set)
>> + cdns3_transfer_completed(priv_dev, priv_ep);
>> + else
>> + cdns3_rearm_transfer(priv_ep, priv_ep->wa1_set);
>> + }
>> +
>> + if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP))
>> + cdns3_transfer_completed(priv_dev, priv_ep);
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_check_usb_interrupt_proceed - Processes interrupt related to device
>> + * @priv_dev: extended gadget object
>> + * @usb_ists: bitmap representation of device's reported interrupts
>> + * (usb_ists register value)
>> + */
>> +static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev,
>> + u32 usb_ists)
>> +{
>> + int speed = 0;
>> +
>> + trace_cdns3_usb_irq(priv_dev, usb_ists);
>> + /* Connection detected */
>> + if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) {
>> + speed = cdns3_get_speed(priv_dev);
>> + priv_dev->gadget.speed = speed;
>> + usb_gadget_set_state(&priv_dev->gadget, USB_STATE_POWERED);
>> + cdns3_ep0_config(priv_dev);
>> + }
>> +
>> + /* Disconnection detected */
>> + if (usb_ists & (USB_ISTS_DIS2I | USB_ISTS_DISI)) {
>> + if (priv_dev->gadget_driver &&
>> + priv_dev->gadget_driver->disconnect) {
>> + spin_unlock(&priv_dev->lock);
>> + priv_dev->gadget_driver->disconnect(&priv_dev->gadget);
>> + spin_lock(&priv_dev->lock);
>> + }
>> +
>> + priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
>> + usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
>> + cdns3_hw_reset_eps_config(priv_dev);
>> + }
>> +
>> + /* reset*/
>> + if (usb_ists & (USB_ISTS_UWRESI | USB_ISTS_UHRESI | USB_ISTS_U2RESI)) {
>> + /*read again to check the actuall speed*/
>> + speed = cdns3_get_speed(priv_dev);
>> + usb_gadget_set_state(&priv_dev->gadget, USB_STATE_DEFAULT);
>> + priv_dev->gadget.speed = speed;
>> + cdns3_hw_reset_eps_config(priv_dev);
>> + cdns3_ep0_config(priv_dev);
>> + }
>> +}
>> +
>> +/**
>> + * cdns3_device_irq_handler- interrupt handler for device part of controller
>> + *
>> + * @irq: irq number for cdns3 core device
>> + * @data: structure of cdns3
>> + *
>> + * Returns IRQ_HANDLED or IRQ_NONE
>> + */
>> +static irqreturn_t cdns3_device_irq_handler(int irq, void *data)
>> +{
>> + struct cdns3_device *priv_dev;
>> + struct cdns3 *cdns = data;
>> + irqreturn_t ret = IRQ_NONE;
>> + unsigned long flags;
>> + u32 reg;
>> +
>> + priv_dev = cdns->gadget_dev;
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + /* check USB device interrupt */
>> + reg = readl(&priv_dev->regs->usb_ists);
>> + writel(reg, &priv_dev->regs->usb_ists);
>> +
>> + if (reg) {
>> + cdns3_check_usb_interrupt_proceed(priv_dev, reg);
>> + ret = IRQ_HANDLED;
>> + }
>> +
>> + /* check endpoint interrupt */
>> + reg = readl(&priv_dev->regs->ep_ists);
>> +
>> + if (reg) {
>> + priv_dev->shadow_ep_en |= reg;
>> + reg = ~reg & readl(&priv_dev->regs->ep_ien);
>> + /* mask deferred interrupt. */
>> + writel(reg, &priv_dev->regs->ep_ien);
>> + ret = IRQ_WAKE_THREAD;
>> + }
>> +
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_device_thread_irq_handler- interrupt handler for device part
>> + * of controller
>> + *
>> + * @irq: irq number for cdns3 core device
>> + * @data: structure of cdns3
>> + *
>> + * Returns IRQ_HANDLED or IRQ_NONE
>> + */
>> +static irqreturn_t cdns3_device_thread_irq_handler(int irq, void *data)
>> +{
>> + struct cdns3_device *priv_dev;
>> + struct cdns3 *cdns = data;
>> + irqreturn_t ret = IRQ_NONE;
>> + unsigned long flags;
>> + u32 ep_ien;
>> + int bit;
>> + u32 reg;
>> +
>> + priv_dev = cdns->gadget_dev;
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + reg = readl(&priv_dev->regs->ep_ists);
>> +
>> + /* handle default endpoint OUT */
>> + if (reg & EP_ISTS_EP_OUT0) {
>> + cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_OUT);
>> + ret = IRQ_HANDLED;
>> + }
>> +
>> + /* handle default endpoint IN */
>> + if (reg & EP_ISTS_EP_IN0) {
>> + cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_IN);
>> + ret = IRQ_HANDLED;
>> + }
>> +
>> + /* check if interrupt from non default endpoint, if no exit */
>> + reg &= ~(EP_ISTS_EP_OUT0 | EP_ISTS_EP_IN0);
>> + if (!reg)
>> + goto irqend;
>> +
>> + for_each_set_bit(bit, (unsigned long *)&reg,
>> + sizeof(u32) * BITS_PER_BYTE) {
>> + priv_dev->shadow_ep_en |= BIT(bit);
>> + cdns3_check_ep_interrupt_proceed(priv_dev->eps[bit]);
>> + ret = IRQ_HANDLED;
>> + }
>> +
>> +irqend:
>> + ep_ien = readl(&priv_dev->regs->ep_ien) | priv_dev->shadow_ep_en;
>> + priv_dev->shadow_ep_en = 0;
>> + /* Unmask all handled EP interrupts */
>> + writel(ep_ien, &priv_dev->regs->ep_ien);
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_ep_onchip_buffer_reserve - Try to reserve onchip buf for EP
>> + *
>> + * The real reservation will occur during write to EP_CFG register,
>> + * this function is used to check if the 'size' reservation is allowed.
>> + *
>> + * @priv_dev: extended gadget object
>> + * @size: the size (KB) for EP would like to allocate
>> + *
>> + * Return 0 if the required size can met or negative value on failure
>> + */
>> +static int cdns3_ep_onchip_buffer_reserve(struct cdns3_device *priv_dev,
>> + int size)
>> +{
>> + u32 onchip_mem;
>> +
>> + priv_dev->onchip_mem_allocated_size += size;
>> +
>> + onchip_mem = USB_CAP2_ACTUAL_MEM_SIZE(readl(&priv_dev->regs->usb_cap2));
>> + if (!onchip_mem)
>> + onchip_mem = 256;
>> +
>> + /* 2KB is reserved for EP0*/
>> + onchip_mem -= 2;
>> + if (priv_dev->onchip_mem_allocated_size > onchip_mem) {
>> + priv_dev->onchip_mem_allocated_size -= size;
>> + return -EPERM;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_ep_config Configure hardware endpoint
>> + * @priv_ep: extended endpoint object
>> + */
>> +void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
>> +{
>> + bool is_iso_ep = (priv_ep->type == USB_ENDPOINT_XFER_ISOC);
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + u32 bEndpointAddress = priv_ep->num | priv_ep->dir;
>> + u32 buffering = CDNS3_EP_BUF_SIZE - 1;
>> + u32 max_packet_size = 0;
>> + u32 ep_cfg = 0;
>> + int ret;
>> +
>> + switch (priv_ep->type) {
>> + case USB_ENDPOINT_XFER_INT:
>> + ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_INT);
>> + break;
>> + case USB_ENDPOINT_XFER_BULK:
>> + ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_BULK);
>> + break;
>> + default:
>> + ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_ISOC);
>> + buffering = priv_ep->endpoint.mult + 1;
>> + }
>> +
>> + switch (priv_dev->gadget.speed) {
>> + case USB_SPEED_FULL:
>> + max_packet_size = is_iso_ep ? 1023 : 64;
>> + break;
>> + case USB_SPEED_HIGH:
>> + max_packet_size = is_iso_ep ? 1024 : 512;
>> + break;
>> + case USB_SPEED_SUPER:
>> + max_packet_size = 1024;
>> + if (priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
>> + buffering = (priv_ep->endpoint.mult + 1) *
>> + (priv_ep->endpoint.maxburst + 1);
>> +
>> + if (priv_ep->interval > 1)
>> + buffering++;
>> + }
>> + break;
>> + default:
>> + /* all other speed are not supported */
>> + return;
>> + }
>> +
>> + ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering);
>> + if (ret) {
>> + dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n");
>> + return;
>> + }
>> +
>> + ep_cfg |= EP_CFG_MAXPKTSIZE(max_packet_size) |
>> + EP_CFG_MULT(priv_ep->endpoint.mult) |
>> + EP_CFG_BUFFERING(buffering) |
>> + EP_CFG_MAXBURST(priv_ep->endpoint.maxburst);
>> +
>> + cdns3_select_ep(priv_dev, bEndpointAddress);
>> + writel(ep_cfg, &priv_dev->regs->ep_cfg);
>> +
>> + dev_dbg(priv_dev->dev, "Configure %s: with val %08x\n",
>> + priv_ep->name, ep_cfg);
>> +}
>> +
>> +/* Find correct direction for HW endpoint according to description */
>> +static int cdns3_ep_dir_is_correct(struct usb_endpoint_descriptor *desc,
>> + struct cdns3_endpoint *priv_ep)
>> +{
>> + return (priv_ep->endpoint.caps.dir_in && usb_endpoint_dir_in(desc)) ||
>> + (priv_ep->endpoint.caps.dir_out && usb_endpoint_dir_out(desc));
>> +}
>> +
>> +static struct
>> +cdns3_endpoint *cdns3_find_available_ep(struct cdns3_device *priv_dev,
>> + struct usb_endpoint_descriptor *desc)
>> +{
>> + struct usb_ep *ep;
>> + struct cdns3_endpoint *priv_ep;
>> +
>> + list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
>> + unsigned long num;
>> + int ret;
>> + /* ep name pattern likes epXin or epXout */
>> + char c[2] = {ep->name[2], '\0'};
>> +
>> + ret = kstrtoul(c, 10, &num);
>> + if (ret)
>> + return ERR_PTR(ret);
>> +
>> + priv_ep = ep_to_cdns3_ep(ep);
>> + if (cdns3_ep_dir_is_correct(desc, priv_ep)) {
>> + if (!(priv_ep->flags & EP_CLAIMED)) {
>> + priv_ep->num = num;
>> + return priv_ep;
>> + }
>> + }
>> + }
>> +
>> + return ERR_PTR(-ENOENT);
>> +}
>> +
>> +/*
>> + * Cadence IP has one limitation that all endpoints must be configured
>> + * (Type & MaxPacketSize) before setting configuration through hardware
>> + * register, it means we can't change endpoints configuration after
>> + * set_configuration.
>> + *
>> + * This function set EP_CLAIMED flag which is added when the gadget driver
>> + * uses usb_ep_autoconfig to configure specific endpoint;
>> + * When the udc driver receives set_configurion request,
>> + * it goes through all claimed endpoints, and configure all endpoints
>> + * accordingly.
>> + *
>> + * At usb_ep_ops.enable/disable, we only enable and disable endpoint through
>> + * ep_cfg register which can be changed after set_configuration, and do
>> + * some software operation accordingly.
>> + */
>> +static struct
>> +usb_ep *cdns3_gadget_match_ep(struct usb_gadget *gadget,
>> + struct usb_endpoint_descriptor *desc,
>> + struct usb_ss_ep_comp_descriptor *comp_desc)
>> +{
>> + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
>> + struct cdns3_endpoint *priv_ep;
>> + unsigned long flags;
>> +
>> + priv_ep = cdns3_find_available_ep(priv_dev, desc);
>> + if (IS_ERR(priv_ep)) {
>> + dev_err(priv_dev->dev, "no available ep\n");
>> + return NULL;
>> + }
>> +
>> + dev_dbg(priv_dev->dev, "match endpoint: %s\n", priv_ep->name);
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> + priv_ep->endpoint.desc = desc;
>> + priv_ep->dir = usb_endpoint_dir_in(desc) ? USB_DIR_IN : USB_DIR_OUT;
>> + priv_ep->type = usb_endpoint_type(desc);
>> + priv_ep->flags |= EP_CLAIMED;
>> + priv_ep->interval = desc->bInterval ? BIT(desc->bInterval - 1) : 0;
>> +
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return &priv_ep->endpoint;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_alloc_request Allocates request
>> + * @ep: endpoint object associated with request
>> + * @gfp_flags: gfp flags
>> + *
>> + * Returns allocated request address, NULL on allocation error
>> + */
>> +struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep,
>> + gfp_t gfp_flags)
>> +{
>> + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
>> + struct cdns3_request *priv_req;
>> +
>> + priv_req = kzalloc(sizeof(*priv_req), gfp_flags);
>> + if (!priv_req)
>> + return NULL;
>> +
>> + priv_req->priv_ep = priv_ep;
>> +
>> + trace_cdns3_alloc_request(priv_req);
>> + return &priv_req->request;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_free_request Free memory occupied by request
>> + * @ep: endpoint object associated with request
>> + * @request: request to free memory
>> + */
>> +void cdns3_gadget_ep_free_request(struct usb_ep *ep,
>> + struct usb_request *request)
>> +{
>> + struct cdns3_request *priv_req = to_cdns3_request(request);
>> +
>> + trace_cdns3_free_request(priv_req);
>> + kfree(priv_req);
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_enable Enable endpoint
>> + * @ep: endpoint object
>> + * @desc: endpoint descriptor
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +static int cdns3_gadget_ep_enable(struct usb_ep *ep,
>> + const struct usb_endpoint_descriptor *desc)
>> +{
>> + struct cdns3_endpoint *priv_ep;
>> + struct cdns3_device *priv_dev;
>> + u32 reg = EP_STS_EN_TRBERREN;
>> + u32 bEndpointAddress;
>> + unsigned long flags;
>> + int ret;
>> +
>> + priv_ep = ep_to_cdns3_ep(ep);
>> + priv_dev = priv_ep->cdns3_dev;
>> +
>> + if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {
>> + dev_dbg(priv_dev->dev, "usbss: invalid parameters\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (!desc->wMaxPacketSize) {
>> + dev_err(priv_dev->dev, "usbss: missing wMaxPacketSize\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (dev_WARN_ONCE(priv_dev->dev, priv_ep->flags & EP_ENABLED,
>> + "%s is already enabled\n", priv_ep->name))
>> + return 0;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + priv_ep->endpoint.desc = desc;
>> + priv_ep->type = usb_endpoint_type(desc);
>> + priv_ep->interval = desc->bInterval ? BIT(desc->bInterval - 1) : 0;
>> +
>> + if (priv_ep->interval > ISO_MAX_INTERVAL &&
>> + priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
>> + dev_err(priv_dev->dev, "Driver is limited to %d period\n",
>> + ISO_MAX_INTERVAL);
>> +
>> + ret = -EINVAL;
>> + goto exit;
>> + }
>> +
>> + ret = cdns3_allocate_trb_pool(priv_ep);
>> +
>> + if (ret)
>> + goto exit;
>> +
>> + bEndpointAddress = priv_ep->num | priv_ep->dir;
>> + cdns3_select_ep(priv_dev, bEndpointAddress);
>> +
>> + trace_cdns3_gadget_ep_enable(priv_ep);
>> +
>> + writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
>> +
>> + ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
>> + EP_CMD_CSTALL | EP_CMD_EPRST, 0, 100);
>> +
>> + /* enable interrupt for selected endpoint */
>> + cdns3_set_register_bit(&priv_dev->regs->ep_ien,
>> + BIT(cdns3_ep_addr_to_index(bEndpointAddress)));
>> +
>> + writel(reg, &priv_dev->regs->ep_sts_en);
>> +
>> + cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_ENABLE);
>> +
>> + ep->desc = desc;
>> + priv_ep->flags &= ~(EP_PENDING_REQUEST | EP_STALL);
>> + priv_ep->flags |= EP_ENABLED | EP_UPDATE_EP_TRBADDR;
>> + priv_ep->wa1_set = 0;
>> + priv_ep->enqueue = 0;
>> + priv_ep->dequeue = 0;
>> + reg = readl(&priv_dev->regs->ep_sts);
>> + priv_ep->pcs = !!EP_STS_CCS(reg);
>> + priv_ep->ccs = !!EP_STS_CCS(reg);
>> + /* one TRB is reserved for link TRB used in DMULT mode*/
>> + priv_ep->free_trbs = priv_ep->num_trbs - 1;
>> +exit:
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_disable Disable endpoint
>> + * @ep: endpoint object
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +static int cdns3_gadget_ep_disable(struct usb_ep *ep)
>> +{
>> + struct cdns3_endpoint *priv_ep;
>> + struct cdns3_device *priv_dev;
>> + struct usb_request *request;
>> + unsigned long flags;
>> + int ret = 0;
>> + u32 ep_cfg;
>> +
>> + if (!ep) {
>> + pr_err("usbss: invalid parameters\n");
>> + return -EINVAL;
>> + }
>> +
>> + priv_ep = ep_to_cdns3_ep(ep);
>> + priv_dev = priv_ep->cdns3_dev;
>> +
>> + if (dev_WARN_ONCE(priv_dev->dev, !(priv_ep->flags & EP_ENABLED),
>> + "%s is already disabled\n", priv_ep->name))
>> + return 0;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + trace_cdns3_gadget_ep_disable(priv_ep);
>> +
>> + cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
>> + ret = cdns3_data_flush(priv_ep);
>> +
>> + ep_cfg = readl(&priv_dev->regs->ep_cfg);
>> + ep_cfg &= ~EP_CFG_ENABLE;
>> + writel(ep_cfg, &priv_dev->regs->ep_cfg);
>> +
>> + while (!list_empty(&priv_ep->pending_req_list)) {
>> + request = cdns3_next_request(&priv_ep->pending_req_list);
>> +
>> + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
>> + -ESHUTDOWN);
>> + }
>> +
>> + while (!list_empty(&priv_ep->deferred_req_list)) {
>> + request = cdns3_next_request(&priv_ep->deferred_req_list);
>> +
>> + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
>> + -ESHUTDOWN);
>> + }
>> +
>> + priv_ep->descmis_req = NULL;
>> +
>> + ep->desc = NULL;
>> + priv_ep->flags &= ~EP_ENABLED;
>> +
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_queue Transfer data on endpoint
>> + * @ep: endpoint object
>> + * @request: request object
>> + * @gfp_flags: gfp flags
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +static int __cdns3_gadget_ep_queue(struct usb_ep *ep,
>> + struct usb_request *request,
>> + gfp_t gfp_flags)
>> +{
>> + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + struct cdns3_request *priv_req;
>> + int deferred = 0;
>> + int ret = 0;
>> +
>> + request->actual = 0;
>> + request->status = -EINPROGRESS;
>> + priv_req = to_cdns3_request(request);
>> + trace_cdns3_ep_queue(priv_req);
>> +
>> + ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request,
>> + usb_endpoint_dir_in(ep->desc));
>> + if (ret)
>> + return ret;
>> +
>> + /*
>> + * If hardware endpoint configuration has not been set yet then
>> + * just queue request in deferred list. Transfer will be started in
>> + * cdns3_set_hw_configuration.
>> + */
>> + if (!priv_dev->hw_configured_flag)
>> + deferred = 1;
>> + else
>> + ret = cdns3_ep_run_transfer(priv_ep, request);
>> +
>> + if (ret || deferred)
>> + list_add_tail(&request->list, &priv_ep->deferred_req_list);
>> + else
>> + list_add_tail(&request->list, &priv_ep->pending_req_list);
>> +
>> + return ret;
>> +}
>> +
>> +static int cdns3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request,
>> + gfp_t gfp_flags)
>> +{
>> + struct usb_request *zlp_request;
>> + struct cdns3_endpoint *priv_ep;
>> + struct cdns3_device *priv_dev;
>> + unsigned long flags;
>> + int ret;
>> +
>> + if (!request || !ep)
>> + return -EINVAL;
>> +
>> + priv_ep = ep_to_cdns3_ep(ep);
>> + priv_dev = priv_ep->cdns3_dev;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + ret = __cdns3_gadget_ep_queue(ep, request, gfp_flags);
>> +
>> + if (ret == 0 && request->zero && request->length &&
>> + (request->length % ep->maxpacket == 0)) {
>> + struct cdns3_request *priv_req;
>> +
>> + zlp_request = cdns3_gadget_ep_alloc_request(ep, GFP_ATOMIC);
>> + zlp_request->buf = priv_dev->zlp_buf;
>> + zlp_request->length = 0;
>> +
>> + priv_req = to_cdns3_request(zlp_request);
>> + priv_req->flags |= REQUEST_ZLP;
>> +
>> + dev_dbg(priv_dev->dev, "Queuing ZLP for endpoint: %s\n",
>> + priv_ep->name);
>> + ret = __cdns3_gadget_ep_queue(ep, zlp_request, gfp_flags);
>> + }
>> +
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_dequeue Remove request from transfer queue
>> + * @ep: endpoint object associated with request
>> + * @request: request object
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +int cdns3_gadget_ep_dequeue(struct usb_ep *ep,
>> + struct usb_request *request)
>> +{
>> + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + struct usb_request *req, *req_temp;
>> + struct cdns3_request *priv_req;
>> + struct cdns3_trb *link_trb;
>> + unsigned long flags;
>> + int ret = 0;
>> +
>> + if (!ep || !request || !ep->desc)
>> + return -EINVAL;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + priv_req = to_cdns3_request(request);
>> +
>> + trace_cdns3_ep_dequeue(priv_req);
>> +
>> + cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
>> +
>> + list_for_each_entry_safe(req, req_temp, &priv_ep->pending_req_list,
>> + list) {
>> + if (request == req)
>> + goto found;
>> + }
>> +
>> + list_for_each_entry_safe(req, req_temp, &priv_ep->deferred_req_list,
>> + list) {
>> + if (request == req)
>> + goto found;
>> + }
>> +
>> + goto not_found;
>> +
>> +found:
>> +
>> + if (priv_ep->wa1_trb == priv_req->trb)
>> + cdns3_wa1_restore_cycle_bit(priv_ep);
>> +
>> + link_trb = priv_req->trb;
>> + cdns3_move_deq_to_next_trb(priv_req);
>> + cdns3_gadget_giveback(priv_ep, priv_req, -ECONNRESET);
>> +
>> + /* Update ring */
>> + request = cdns3_next_request(&priv_ep->deferred_req_list);
>> + if (request) {
>> + priv_req = to_cdns3_request(request);
>> +
>> + link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma +
>> + (priv_req->start_trb * TRB_SIZE));
>> + link_trb->control = (link_trb->control & TRB_CYCLE) |
>> + TRB_TYPE(TRB_LINK) | TRB_CHAIN | TRB_TOGGLE;
>> + } else {
>> + priv_ep->flags |= EP_UPDATE_EP_TRBADDR;
>> + }
>> +
>> +not_found:
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return ret;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_ep_set_halt Sets/clears stall on selected endpoint
>> + * @ep: endpoint object to set/clear stall on
>> + * @value: 1 for set stall, 0 for clear stall
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value)
>> +{
>> + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
>> + struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
>> + unsigned long flags;
>> + int ret = 0;
>> +
>> + if (!(priv_ep->flags & EP_ENABLED))
>> + return -EPERM;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
>> + if (value) {
>> + cdns3_ep_stall_flush(priv_ep);
>> + } else {
>> + priv_ep->flags &= ~EP_WEDGE;
>> +
>> + cdns3_dbg(priv_ep->cdns3_dev, "Clear stalled endpoint %s\n",
>> + priv_ep->name);
>> +
>> + writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
>> +
>> + /* wait for EPRST cleared */
>> + ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
>> + EP_CMD_EPRST, 0, 100);
>> + if (unlikely(ret)) {
>> + dev_err(priv_dev->dev,
>> + "Clearing halt condition failed for %s\n",
>> + priv_ep->name);
>> + goto finish;
>> +
>> + } else {
>> + priv_ep->flags &= ~EP_STALL;
>> + }
>> + }
>> +
>> + priv_ep->flags &= ~EP_PENDING_REQUEST;
>> +finish:
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> +
>> + return ret;
>> +}
>> +
>> +extern const struct usb_ep_ops cdns3_gadget_ep0_ops;
>> +
>> +static const struct usb_ep_ops cdns3_gadget_ep_ops = {
>> + .enable = cdns3_gadget_ep_enable,
>> + .disable = cdns3_gadget_ep_disable,
>> + .alloc_request = cdns3_gadget_ep_alloc_request,
>> + .free_request = cdns3_gadget_ep_free_request,
>> + .queue = cdns3_gadget_ep_queue,
>> + .dequeue = cdns3_gadget_ep_dequeue,
>> + .set_halt = cdns3_gadget_ep_set_halt,
>> + .set_wedge = cdns3_gadget_ep_set_wedge,
>> +};
>> +
>> +/**
>> + * cdns3_gadget_get_frame Returns number of actual ITP frame
>> + * @gadget: gadget object
>> + *
>> + * Returns number of actual ITP frame
>> + */
>> +static int cdns3_gadget_get_frame(struct usb_gadget *gadget)
>> +{
>> + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
>> +
>> + return readl(&priv_dev->regs->usb_iptn);
>> +}
>> +
>> +static int cdns3_gadget_wakeup(struct usb_gadget *gadget)
>> +{
>> + return 0;
>> +}
>> +
>> +static int cdns3_gadget_set_selfpowered(struct usb_gadget *gadget,
>> + int is_selfpowered)
>> +{
>> + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
>> + unsigned long flags;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> + priv_dev->is_selfpowered = !!is_selfpowered;
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return 0;
>> +}
>> +
>> +static int cdns3_gadget_pullup(struct usb_gadget *gadget, int is_on)
>> +{
>> + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
>> +
>> + if (is_on)
>> + writel(USB_CONF_DEVEN, &priv_dev->regs->usb_conf);
>> + else
>> + writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf);
>> +
>> + return 0;
>> +}
>> +
>> +static void cdns3_gadget_config(struct cdns3_device *priv_dev)
>> +{
>> + struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
>> +
>> + cdns3_ep0_config(priv_dev);
>> +
>> + /* enable interrupts for endpoint 0 (in and out) */
>> + writel(EP_IEN_EP_OUT0 | EP_IEN_EP_IN0, &regs->ep_ien);
>> +
>> + /*
>> + *Driver need modify LFPS minimal U1 Exit time for 0x00024505 revision
>> + * of controller
>> + */
>> + if (priv_dev->dev_ver == 0x00024505) {
>> + u32 reg = readl(&regs->dbg_link1);
>> +
>> + reg &= ~DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_MASK;
>> + reg |= DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(0x55) |
>> + DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET;
>> + writel(reg, &regs->dbg_link1);
>> + }
>> +
>> + /* enable generic interrupt*/
>> + writel(USB_IEN_INIT, &regs->usb_ien);
>> + writel(USB_CONF_CLK2OFFDS | USB_CONF_L1DS, &regs->usb_conf);
>> + writel(USB_CONF_DMULT, &regs->usb_conf);
>> + cdns3_gadget_pullup(&priv_dev->gadget, 1);
>> +}
>> +
>> +/**
>> + * cdns3_gadget_udc_start Gadget start
>> + * @gadget: gadget object
>> + * @driver: driver which operates on this gadget
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +static int cdns3_gadget_udc_start(struct usb_gadget *gadget,
>> + struct usb_gadget_driver *driver)
>> +{
>> + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
>> + unsigned long flags;
>> +
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> + priv_dev->gadget_driver = driver;
>> + cdns3_gadget_config(priv_dev);
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_udc_stop Stops gadget
>> + * @gadget: gadget object
>> + *
>> + * Returns 0
>> + */
>> +static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
>> +{
>> + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
>> + struct cdns3_endpoint *priv_ep;
>> + u32 bEndpointAddress;
>> + struct usb_ep *ep;
>> + int ret = 0;
>> +
>> + priv_dev->gadget_driver = NULL;
>> +
>> + priv_dev->onchip_mem_allocated_size = 0;
>> + priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
>> +
>> + list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
>> + priv_ep = ep_to_cdns3_ep(ep);
>> + bEndpointAddress = priv_ep->num | priv_ep->dir;
>> + cdns3_select_ep(priv_dev, bEndpointAddress);
>> + writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
>> + ret = cdns3_handshake(&priv_dev->regs->ep_cmd,
>> + EP_CMD_EPRST, 0, 100);
>> + cdns3_free_trb_pool(priv_ep);
>> + }
>> +
>> + /* disable interrupt for device */
>> + writel(0, &priv_dev->regs->usb_ien);
>> + writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf);
>> +
>> + return ret;
>> +}
>> +
>> +static const struct usb_gadget_ops cdns3_gadget_ops = {
>> + .get_frame = cdns3_gadget_get_frame,
>> + .wakeup = cdns3_gadget_wakeup,
>> + .set_selfpowered = cdns3_gadget_set_selfpowered,
>> + .pullup = cdns3_gadget_pullup,
>> + .udc_start = cdns3_gadget_udc_start,
>> + .udc_stop = cdns3_gadget_udc_stop,
>> + .match_ep = cdns3_gadget_match_ep,
>> +};
>> +
>> +static void cdns3_free_all_eps(struct cdns3_device *priv_dev)
>> +{
>> + int i;
>> +
>> + /*ep0 OUT point to ep0 IN*/
>> + priv_dev->eps[16] = NULL;
>> +
>> + cdns3_free_trb_pool(priv_dev->eps[0]);
>> +
>> + for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++)
>> + if (priv_dev->eps[i])
>> + devm_kfree(priv_dev->dev, priv_dev->eps[i]);
>> +}
>> +
>> +/**
>> + * cdns3_init_eps Initializes software endpoints of gadget
>> + * @cdns3: extended gadget object
>> + *
>> + * Returns 0 on success, error code elsewhere
>> + */
>> +static int cdns3_init_eps(struct cdns3_device *priv_dev)
>> +{
>> + u32 ep_enabled_reg, iso_ep_reg;
>> + struct cdns3_endpoint *priv_ep;
>> + int ep_dir, ep_number;
>> + u32 ep_mask;
>> + int ret = 0;
>> + int i;
>> +
>> + /* Read it from USB_CAP3 to USB_CAP5 */
>> + ep_enabled_reg = readl(&priv_dev->regs->usb_cap3);
>> + iso_ep_reg = readl(&priv_dev->regs->usb_cap4);
>> +
>> + dev_dbg(priv_dev->dev, "Initializing non-zero endpoints\n");
>> +
>> + for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
>> + ep_dir = i >> 4; /* i div 16 */
>> + ep_number = i & 0xF; /* i % 16 */
>> + ep_mask = BIT(i);
>> +
>> + if (!(ep_enabled_reg & ep_mask))
>> + continue;
>> +
>> + if (ep_dir && !ep_number) {
>> + priv_dev->eps[i] = priv_dev->eps[0];
>> + continue;
>> + }
>> +
>> + priv_ep = devm_kzalloc(priv_dev->dev, sizeof(*priv_ep),
>> + GFP_KERNEL);
>> + if (!priv_ep) {
>> + ret = -ENOMEM;
>> + goto err;
>> + }
>> +
>> + /* set parent of endpoint object */
>> + priv_ep->cdns3_dev = priv_dev;
>> + priv_dev->eps[i] = priv_ep;
>> + priv_ep->num = ep_number;
>> + priv_ep->dir = ep_dir ? USB_DIR_IN : USB_DIR_OUT;
>> +
>> + if (!ep_number) {
>> + ret = cdns3_init_ep0(priv_dev, priv_ep);
>> + if (ret) {
>> + dev_err(priv_dev->dev, "Failed to init ep0\n");
>> + goto err;
>> + }
>> + } else {
>> + snprintf(priv_ep->name, sizeof(priv_ep->name), "ep%d%s",
>> + ep_number, !!ep_dir ? "in" : "out");
>> + priv_ep->endpoint.name = priv_ep->name;
>> +
>> + usb_ep_set_maxpacket_limit(&priv_ep->endpoint,
>> + CDNS3_EP_MAX_PACKET_LIMIT);
>> + priv_ep->endpoint.max_streams = CDNS3_EP_MAX_STREAMS;
>> + priv_ep->endpoint.ops = &cdns3_gadget_ep_ops;
>> + if (ep_dir)
>> + priv_ep->endpoint.caps.dir_in = 1;
>> + else
>> + priv_ep->endpoint.caps.dir_out = 1;
>> +
>> + if (iso_ep_reg & ep_mask)
>> + priv_ep->endpoint.caps.type_iso = 1;
>> +
>> + priv_ep->endpoint.caps.type_bulk = 1;
>> + priv_ep->endpoint.caps.type_int = 1;
>> + priv_ep->endpoint.maxburst = CDNS3_EP_BUF_SIZE - 1;
>> +
>> + list_add_tail(&priv_ep->endpoint.ep_list,
>> + &priv_dev->gadget.ep_list);
>> + }
>> +
>> + priv_ep->flags = 0;
>> +
>> + dev_info(priv_dev->dev, "Initialized %s support: %s %s\n",
>> + priv_ep->name,
>> + priv_ep->endpoint.caps.type_bulk ? "BULK, INT" : "",
>> + priv_ep->endpoint.caps.type_iso ? "ISO" : "");
>> +
>> + INIT_LIST_HEAD(&priv_ep->pending_req_list);
>> + INIT_LIST_HEAD(&priv_ep->deferred_req_list);
>> + }
>> +
>> + return 0;
>> +err:
>> + cdns3_free_all_eps(priv_dev);
>> + return -ENOMEM;
>> +}
>> +
>> +static void cdns3_gadget_disable(struct cdns3 *cdns)
>> +{
>> + struct cdns3_device *priv_dev;
>> +
>> + priv_dev = cdns->gadget_dev;
>> +
>> + if (priv_dev->gadget_driver)
>> + priv_dev->gadget_driver->disconnect(&priv_dev->gadget);
>> +
>> + usb_gadget_disconnect(&priv_dev->gadget);
>> + priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
>> +}
>> +
>> +void cdns3_gadget_exit(struct cdns3 *cdns)
>> +{
>> + struct cdns3_device *priv_dev;
>> +
>> + priv_dev = cdns->gadget_dev;
>> +
>> + cdns3_gadget_disable(cdns);
>> +
>> + devm_free_irq(cdns->dev, cdns->irq, cdns);
>> +
>> + pm_runtime_mark_last_busy(cdns->dev);
>> + pm_runtime_put_autosuspend(cdns->dev);
>> +
>> + usb_del_gadget_udc(&priv_dev->gadget);
>> +
>> + cdns3_free_all_eps(priv_dev);
>> +
>> + dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf,
>> + priv_dev->setup_dma);
>> +
>> + kfree(priv_dev->zlp_buf);
>> + kfree(priv_dev);
>> + cdns->gadget_dev = NULL;
>> +}
>> +
>> +static int cdns3_gadget_start(struct cdns3 *cdns)
>> +{
>> + struct cdns3_device *priv_dev;
>> + u32 max_speed;
>> + int ret;
>> +
>> + priv_dev = kzalloc(sizeof(*priv_dev), GFP_KERNEL);
>> + if (!priv_dev)
>> + return -ENOMEM;
>> +
>> + cdns->gadget_dev = priv_dev;
>> + priv_dev->sysdev = cdns->dev;
>> + priv_dev->dev = cdns->dev;
>> + priv_dev->regs = cdns->dev_regs;
>> +
>> + max_speed = usb_get_maximum_speed(cdns->dev);
>> +
>> + /* Check the maximum_speed parameter */
>> + switch (max_speed) {
>> + case USB_SPEED_FULL:
>> + case USB_SPEED_HIGH:
>> + case USB_SPEED_SUPER:
>> + break;
>> + default:
>> + dev_err(cdns->dev, "invalid maximum_speed parameter %d\n",
>> + max_speed);
>> + /* fall through */
>> + case USB_SPEED_UNKNOWN:
>> + /* default to superspeed */
>> + max_speed = USB_SPEED_SUPER;
>> + break;
>> + }
>> +
>> + /* fill gadget fields */
>> + priv_dev->gadget.max_speed = max_speed;
>> + priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
>> + priv_dev->gadget.ops = &cdns3_gadget_ops;
>> + priv_dev->gadget.name = "usb-ss-gadget";
>> + priv_dev->gadget.sg_supported = 1;
>> +
>> + spin_lock_init(&priv_dev->lock);
>> + INIT_WORK(&priv_dev->pending_status_wq,
>> + cdns3_pending_setup_status_handler);
>> +
>> + /* initialize endpoint container */
>> + INIT_LIST_HEAD(&priv_dev->gadget.ep_list);
>> +
>> + ret = cdns3_init_eps(priv_dev);
>> + if (ret) {
>> + dev_err(priv_dev->dev, "Failed to create endpoints\n");
>> + goto err1;
>> + }
>> +
>> + /* allocate memory for setup packet buffer */
>> + priv_dev->setup_buf = dma_alloc_coherent(priv_dev->sysdev, 8,
>> + &priv_dev->setup_dma, GFP_DMA);
>> + if (!priv_dev->setup_buf) {
>> + dev_err(priv_dev->dev, "Failed to allocate memory for SETUP buffer\n");
>> + ret = -ENOMEM;
>> + goto err2;
>> + }
>> +
>> + priv_dev->dev_ver = readl(&priv_dev->regs->usb_cap6);
>> + dev_dbg(priv_dev->dev, "Device Controller version: %08x\n",
>> + readl(&priv_dev->regs->usb_cap6));
>> + dev_dbg(priv_dev->dev, "USB Capabilities:: %08x\n",
>> + readl(&priv_dev->regs->usb_cap1));
>> + dev_dbg(priv_dev->dev, "On-Chip memory cnfiguration: %08x\n",
>> + readl(&priv_dev->regs->usb_cap2));
>> +
>> + priv_dev->zlp_buf = kzalloc(CDNS3_EP_ZLP_BUF_SIZE, GFP_KERNEL);
>> + if (!priv_dev->zlp_buf) {
>> + ret = -ENOMEM;
>> + goto err3;
>> + }
>> +
>> + /* add USB gadget device */
>> + ret = usb_add_gadget_udc(priv_dev->dev, &priv_dev->gadget);
>> + if (ret < 0) {
>> + dev_err(priv_dev->dev,
>> + "Failed to register USB device controller\n");
>> + goto err4;
>> + }
>> +
>> + return 0;
>> +err4:
>> + kfree(priv_dev->zlp_buf);
>> +err3:
>> + dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf,
>> + priv_dev->setup_dma);
>> +err2:
>> + cdns3_free_all_eps(priv_dev);
>> +err1:
>> + cdns->gadget_dev = NULL;
>> + return ret;
>> +}
>> +
>> +static int __cdns3_gadget_init(struct cdns3 *cdns)
>> +{
>> + struct cdns3_device *priv_dev;
>> + unsigned long flags;
>> + int ret = 0;
>> +
>> + ret = cdns3_gadget_start(cdns);
>> + if (ret)
>> + return ret;
>> +
>> + priv_dev = cdns->gadget_dev;
>> + ret = devm_request_threaded_irq(cdns->dev, cdns->irq,
>> + cdns3_device_irq_handler,
>> + cdns3_device_thread_irq_handler,
>> + IRQF_SHARED, dev_name(cdns->dev), cdns);
>> + if (ret)
>> + goto err0;
>> +
>> + pm_runtime_get_sync(cdns->dev);
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return 0;
>> +err0:
>> + cdns3_gadget_exit(cdns);
>> + return ret;
>> +}
>> +
>> +static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup)
>> +{
>> + cdns3_gadget_disable(cdns);
>> + return 0;
>> +}
>> +
>> +static int cdns3_gadget_resume(struct cdns3 *cdns, bool hibernated)
>> +{
>> + struct cdns3_device *priv_dev;
>> + unsigned long flags;
>> +
>> + priv_dev = cdns->gadget_dev;
>> + spin_lock_irqsave(&priv_dev->lock, flags);
>> +
>> + if (!priv_dev->gadget_driver) {
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return 0;
>> + }
>> +
>> + cdns3_gadget_config(priv_dev);
>> + spin_unlock_irqrestore(&priv_dev->lock, flags);
>> + return 0;
>> +}
>> +
>> +/**
>> + * cdns3_gadget_init - initialize device structure
>> + *
>> + * cdns: cdns3 instance
>> + *
>> + * This function initializes the gadget.
>> + */
>> +int cdns3_gadget_init(struct cdns3 *cdns)
>> +{
>> + struct cdns3_role_driver *rdrv;
>> +
>> + rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
>> + if (!rdrv)
>> + return -ENOMEM;
>> +
>> + rdrv->start = __cdns3_gadget_init;
>> + rdrv->stop = cdns3_gadget_exit;
>> + rdrv->suspend = cdns3_gadget_suspend;
>> + rdrv->resume = cdns3_gadget_resume;
>> + rdrv->state = CDNS3_ROLE_STATE_INACTIVE;
>> + rdrv->name = "gadget";
>> + cdns->roles[CDNS3_ROLE_GADGET] = rdrv;
>> +
>> + return 0;
>> +}
>> diff --git a/drivers/usb/cdns3/gadget.h b/drivers/usb/cdns3/gadget.h
>> new file mode 100644
>> index 000000000000..817f8ae7a4da
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/gadget.h
>> @@ -0,0 +1,1207 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * USBSS device controller driver header file
>> + *
>> + * Copyright (C) 2018 Cadence.
>> + * Copyright (C) 2017-2018 NXP
>> + *
>> + * Author: Pawel Laszczak <pawell@cadence.com>
>> + * Pawel Jez <pjez@cadence.com>
>> + * Peter Chen <peter.chen@nxp.com>
>> + */
>> +#ifndef __LINUX_CDNS3_GADGET
>> +#define __LINUX_CDNS3_GADGET
>> +#include <linux/usb/gadget.h>
>> +
>> +/*
>> + * USBSS-DEV register interface.
>> + * This corresponds to the USBSS Device Controller Interface
>> + */
>> +
>> +/**
>> + * struct cdns3_usb_regs - device controller registers.
>> + * @usb_conf: Global Configuration Register.
>> + * @usb_sts: Global Status Register.
>> + * @usb_cmd: Global Command Register.
>> + * @usb_iptn: ITP/SOF number Register.
>> + * @usb_lpm: Global Command Register.
>> + * @usb_ien: USB Interrupt Enable Register.
>> + * @usb_ists: USB Interrupt Status Register.
>> + * @ep_sel: Endpoint Select Register.
>> + * @ep_traddr: Endpoint Transfer Ring Address Register.
>> + * @ep_cfg: Endpoint Configuration Register.
>> + * @ep_cmd: Endpoint Command Register.
>> + * @ep_sts: Endpoint Status Register.
>> + * @ep_sts_sid: Endpoint Status Register.
>> + * @ep_sts_en: Endpoint Status Register Enable.
>> + * @drbl: Doorbell Register.
>> + * @ep_ien: EP Interrupt Enable Register.
>> + * @ep_ists: EP Interrupt Status Register.
>> + * @usb_pwr: Global Power Configuration Register.
>> + * @usb_conf2: Global Configuration Register 2.
>> + * @usb_cap1: Capability Register 1.
>> + * @usb_cap2: Capability Register 2.
>> + * @usb_cap3: Capability Register 3.
>> + * @usb_cap4: Capability Register 4.
>> + * @usb_cap5: Capability Register 5.
>> + * @usb_cap6: Capability Register 6.
>> + * @usb_cpkt1: Custom Packet Register 1.
>> + * @usb_cpkt2: Custom Packet Register 2.
>> + * @usb_cpkt3: Custom Packet Register 3.
>> + * @reserved1: Reserved.
>> + * @cfg_regs: Configuration registers.
>> + * @reserved2: Reserved.
>> + * @dma_axi_ctrl: AXI Control register.
>> + * @dma_axi_id: AXI ID register.
>> + * @dma_axi_cap: AXI Capability register.
>> + * @dma_axi_ctrl0: AXI Control 0 register.
>> + * @dma_axi_ctrl1: AXI Control 1 register.
>> + */
>> +struct cdns3_usb_regs {
>> + __le32 usb_conf;
>> + __le32 usb_sts;
>> + __le32 usb_cmd;
>> + __le32 usb_iptn;
>> + __le32 usb_lpm;
>> + __le32 usb_ien;
>> + __le32 usb_ists;
>> + __le32 ep_sel;
>> + __le32 ep_traddr;
>> + __le32 ep_cfg;
>> + __le32 ep_cmd;
>> + __le32 ep_sts;
>> + __le32 ep_sts_sid;
>> + __le32 ep_sts_en;
>> + __le32 drbl;
>> + __le32 ep_ien;
>> + __le32 ep_ists;
>> + __le32 usb_pwr;
>> + __le32 usb_conf2;
>> + __le32 usb_cap1;
>> + __le32 usb_cap2;
>> + __le32 usb_cap3;
>> + __le32 usb_cap4;
>> + __le32 usb_cap5;
>> + __le32 usb_cap6;
>> + __le32 usb_cpkt1;
>> + __le32 usb_cpkt2;
>> + __le32 usb_cpkt3;
>> + __le32 reserved1[36];
>> + __le32 cfg_reg1;
>> + __le32 dbg_link1;
>> + __le32 dbg_link2;
>> + __le32 cfg_regs[74];
>> + __le32 reserved2[34];
>> + __le32 dma_axi_ctrl;
>> + __le32 dma_axi_id;
>> + __le32 dma_axi_cap;
>> + __le32 dma_axi_ctrl0;
>> + __le32 dma_axi_ctrl1;
>> +};
>> +
>> +/* USB_CONF - bitmasks */
>> +/* Reset USB device configuration. */
>> +#define USB_CONF_CFGRST BIT(0)
>> +/* Set Configuration. */
>> +#define USB_CONF_CFGSET BIT(1)
>> +/* Disconnect USB device in SuperSpeed. */
>> +#define USB_CONF_USB3DIS BIT(3)
>> +/* Disconnect USB device in HS/FS */
>> +#define USB_CONF_USB2DIS BIT(4)
>> +/* Little Endian access - default */
>> +#define USB_CONF_LENDIAN BIT(5)
>> +/*
>> + * Big Endian access. Driver assume that byte order for
>> + * SFRs access always is as Little Endian so this bit
>> + * is not used.
>> + */
>> +#define USB_CONF_BENDIAN BIT(6)
>> +/* Device software reset. */
>> +#define USB_CONF_SWRST BIT(7)
>> +/* Singular DMA transfer mode. */
>> +#define USB_CONF_DSING BIT(8)
>> +/* Multiple DMA transfers mode. */
>> +#define USB_CONF_DMULT BIT(9)
>> +/* DMA clock turn-off enable. */
>> +#define USB_CONF_DMAOFFEN BIT(10)
>> +/* DMA clock turn-off disable. */
>> +#define USB_CONF_DMAOFFDS BIT(11)
>> +/* Clear Force Full Speed. */
>> +#define USB_CONF_CFORCE_FS BIT(12)
>> +/* Set Force Full Speed. */
>> +#define USB_CONF_SFORCE_FS BIT(13)
>> +/* Device enable. */
>> +#define USB_CONF_DEVEN BIT(14)
>> +/* Device disable. */
>> +#define USB_CONF_DEVDS BIT(15)
>> +/* L1 LPM state entry enable (used in HS/FS mode). */
>> +#define USB_CONF_L1EN BIT(16)
>> +/* L1 LPM state entry disable (used in HS/FS mode). */
>> +#define USB_CONF_L1DS BIT(17)
>> +/* USB 2.0 clock gate disable. */
>> +#define USB_CONF_CLK2OFFEN BIT(18)
>> +/* USB 2.0 clock gate enable. */
>> +#define USB_CONF_CLK2OFFDS BIT(19)
>> +/* L0 LPM state entry request (used in HS/FS mode). */
>> +#define USB_CONF_LGO_L0 BIT(20)
>> +/* USB 3.0 clock gate disable. */
>> +#define USB_CONF_CLK3OFFEN BIT(21)
>> +/* USB 3.0 clock gate enable. */
>> +#define USB_CONF_CLK3OFFDS BIT(22)
>> +/* Bit 23 is reserved*/
>> +/* U1 state entry enable (used in SS mode). */
>> +#define USB_CONF_U1EN BIT(24)
>> +/* U1 state entry disable (used in SS mode). */
>> +#define USB_CONF_U1DS BIT(25)
>> +/* U2 state entry enable (used in SS mode). */
>> +#define USB_CONF_U2EN BIT(26)
>> +/* U2 state entry disable (used in SS mode). */
>> +#define USB_CONF_U2DS BIT(27)
>> +/* U0 state entry request (used in SS mode). */
>> +#define USB_CONF_LGO_U0 BIT(28)
>> +/* U1 state entry request (used in SS mode). */
>> +#define USB_CONF_LGO_U1 BIT(29)
>> +/* U2 state entry request (used in SS mode). */
>> +#define USB_CONF_LGO_U2 BIT(30)
>> +/* SS.Inactive state entry request (used in SS mode) */
>> +#define USB_CONF_LGO_SSINACT BIT(31)
>> +
>> +/* USB_STS - bitmasks */
>> +/*
>> + * Configuration status.
>> + * 1 - device is in the configured state.
>> + * 0 - device is not configured.
>> + */
>> +#define USB_STS_CFGSTS_MASK BIT(0)
>> +#define USB_STS_CFGSTS(p) ((p) & USB_STS_CFGSTS_MASK)
>> +/*
>> + * On-chip memory overflow.
>> + * 0 - On-chip memory status OK.
>> + * 1 - On-chip memory overflow.
>> + */
>> +#define USB_STS_OV_MASK BIT(1)
>> +#define USB_STS_OV(p) ((p) & USB_STS_OV_MASK)
>> +/*
>> + * SuperSpeed connection status.
>> + * 0 - USB in SuperSpeed mode disconnected.
>> + * 1 - USB in SuperSpeed mode connected.
>> + */
>> +#define USB_STS_USB3CONS_MASK BIT(2)
>> +#define USB_STS_USB3CONS(p) ((p) & USB_STS_USB3CONS_MASK)
>> +/*
>> + * DMA transfer configuration status.
>> + * 0 - single request.
>> + * 1 - multiple TRB chain
>> + */
>> +#define USB_STS_DTRANS_MASK BIT(3)
>> +#define USB_STS_DTRANS(p) ((p) & USB_STS_DTRANS_MASK)
>> +/*
>> + * Device speed.
>> + * 0 - Undefined (value after reset).
>> + * 1 - Low speed
>> + * 2 - Full speed
>> + * 3 - High speed
>> + * 4 - Super speed
>> + */
>> +#define USB_STS_USBSPEED_MASK GENMASK(6, 4)
>> +#define USB_STS_USBSPEED(p) (((p) & USB_STS_USBSPEED_MASK) >> 4)
>> +#define USB_STS_LS (0x1 << 4)
>> +#define USB_STS_FS (0x2 << 4)
>> +#define USB_STS_HS (0x3 << 4)
>> +#define USB_STS_SS (0x4 << 4)
>> +#define DEV_UNDEFSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == (0x0 << 4))
>> +#define DEV_LOWSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_LS)
>> +#define DEV_FULLSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_FS)
>> +#define DEV_HIGHSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_HS)
>> +#define DEV_SUPERSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_SS)
>> +/*
>> + * Endianness for SFR access.
>> + * 0 - Little Endian order (default after hardware reset).
>> + * 1 - Big Endian order
>> + */
>> +#define USB_STS_ENDIAN_MASK BIT(7)
>> +#define USB_STS_ENDIAN(p) ((p) & USB_STS_ENDIAN_MASK)
>> +/*
>> + * HS/FS clock turn-off status.
>> + * 0 - hsfs clock is always on.
>> + * 1 - hsfs clock turn-off in L2 (HS/FS mode) is enabled
>> + * (default after hardware reset).
>> + */
>> +#define USB_STS_CLK2OFF_MASK BIT(8)
>> +#define USB_STS_CLK2OFF(p) ((p) & USB_STS_CLK2OFF_MASK)
>> +/*
>> + * PCLK clock turn-off status.
>> + * 0 - pclk clock is always on.
>> + * 1 - pclk clock turn-off in U3 (SS mode) is enabled
>> + * (default after hardware reset).
>> + */
>> +#define USB_STS_CLK3OFF_MASK BIT(9)
>> +#define USB_STS_CLK3OFF(p) ((p) & USB_STS_CLK3OFF_MASK)
>> +/*
>> + * Controller in reset state.
>> + * 0 - Internal reset is active.
>> + * 1 - Internal reset is not active and controller is fully operational.
>> + */
>> +#define USB_STS_IN_RST_MASK BIT(10)
>> +#define USB_STS_IN_RST(p) ((p) & USB_STS_IN_RST_MASK)
>> +/*
>> + * Device enable Status.
>> + * 0 - USB device is disabled (VBUS input is disconnected from internal logic).
>> + * 1 - USB device is enabled (VBUS input is connected to the internal logic).
>> + */
>> +#define USB_STS_DEVS_MASK BIT(14)
>> +#define USB_STS_DEVS(p) ((p) & USB_STS_DEVS_MASK)
>> +/*
>> + * DAddress statuss.
>> + * 0 - USB device is default state.
>> + * 1 - USB device is at least in address state.
>> + */
>> +#define USB_STS_ADDRESSED_MASK BIT(15)
>> +#define USB_STS_ADDRESSED(p) ((p) & USB_STS_ADDRESSED_MASK)
>> +/*
>> + * L1 LPM state enable status (used in HS/FS mode).
>> + * 0 - Entering to L1 LPM state disabled.
>> + * 1 - Entering to L1 LPM state enabled.
>> + */
>> +#define USB_STS_L1ENS_MASK BIT(16)
>> +#define USB_STS_L1ENS(p) ((p) & USB_STS_L1ENS_MASK)
>> +/*
>> + * Internal VBUS connection status (used both in HS/FS and SS mode).
>> + * 0 - internal VBUS is not detected.
>> + * 1 - internal VBUS is detected.
>> + */
>> +#define USB_STS_VBUSS_MASK BIT(17)
>> +#define USB_STS_VBUSS(p) ((p) & USB_STS_VBUSS_MASK)
>> +/*
>> + * HS/FS LPM state (used in FS/HS mode).
>> + * 0 - L0 State
>> + * 1 - L1 State
>> + * 2 - L2 State
>> + * 3 - L3 State
>> + */
>> +#define USB_STS_LPMST_MASK GENMASK(19, 18)
>> +#define DEV_L0_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x0 << 18))
>> +#define DEV_L1_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x1 << 18))
>> +#define DEV_L2_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x2 << 18))
>> +#define DEV_L3_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x3 << 18))
>> +/*
>> + * Disable HS status (used in FS/HS mode).
>> + * 0 - the disconnect bit for HS/FS mode is set .
>> + * 1 - the disconnect bit for HS/FS mode is not set.
>> + */
>> +#define USB_STS_USB2CONS_MASK BIT(20)
>> +#define USB_STS_USB2CONS(p) ((p) & USB_STS_USB2CONS_MASK)
>> +/*
>> + * HS/FS mode connection status (used in FS/HS mode).
>> + * 0 - High Speed operations in USB2.0 (FS/HS) mode not disabled.
>> + * 1 - High Speed operations in USB2.0 (FS/HS).
>> + */
>> +#define USB_STS_DISABLE_HS_MASK BIT(21)
>> +#define USB_STS_DISABLE_HS(p) ((p) & USB_STS_DISABLE_HS_MASK)
>> +/*
>> + * U1 state enable status (used in SS mode).
>> + * 0 - Entering to U1 state disabled.
>> + * 1 - Entering to U1 state enabled.
>> + */
>> +#define USB_STS_U1ENS_MASK BIT(24)
>> +#define USB_STS_U1ENS(p) ((p) & USB_STS_U1ENS_MASK)
>> +/*
>> + * U2 state enable status (used in SS mode).
>> + * 0 - Entering to U2 state disabled.
>> + * 1 - Entering to U2 state enabled.
>> + */
>> +#define USB_STS_U2ENS_MASK BIT(25)
>> +#define USB_STS_U2ENS(p) ((p) & USB_STS_U2ENS_MASK)
>> +/*
>> + * SuperSpeed Link LTSSM state. This field reflects USBSS-DEV current
>> + * SuperSpeed link state
>> + */
>> +#define USB_STS_LST_MASK GENMASK(29, 26)
>> +#define DEV_LST_U0 (((p) & USB_STS_LST_MASK) == (0x0 << 26))
>> +#define DEV_LST_U1 (((p) & USB_STS_LST_MASK) == (0x1 << 26))
>> +#define DEV_LST_U2 (((p) & USB_STS_LST_MASK) == (0x2 << 26))
>> +#define DEV_LST_U3 (((p) & USB_STS_LST_MASK) == (0x3 << 26))
>> +#define DEV_LST_DISABLED (((p) & USB_STS_LST_MASK) == (0x4 << 26))
>> +#define DEV_LST_RXDETECT (((p) & USB_STS_LST_MASK) == (0x5 << 26))
>> +#define DEV_LST_INACTIVE (((p) & USB_STS_LST_MASK) == (0x6 << 26))
>> +#define DEV_LST_POLLING (((p) & USB_STS_LST_MASK) == (0x7 << 26))
>> +#define DEV_LST_RECOVERY (((p) & USB_STS_LST_MASK) == (0x8 << 26))
>> +#define DEV_LST_HOT_RESET (((p) & USB_STS_LST_MASK) == (0x9 << 26))
>> +#define DEV_LST_COMP_MODE (((p) & USB_STS_LST_MASK) == (0xa << 26))
>> +#define DEV_LST_LB_STATE (((p) & USB_STS_LST_MASK) == (0xb << 26))
>> +/*
>> + * DMA clock turn-off status.
>> + * 0 - DMA clock is always on (default after hardware reset).
>> + * 1 - DMA clock turn-off in U1, U2 and U3 (SS mode) is enabled.
>> + */
>> +#define USB_STS_DMAOFF_MASK BIT(30)
>> +#define USB_STS_DMAOFF(p) ((p) & USB_STS_DMAOFF_MASK)
>> +/*
>> + * SFR Endian statuss.
>> + * 0 - Little Endian order (default after hardware reset).
>> + * 1 - Big Endian order.
>> + */
>> +#define USB_STS_ENDIAN2_MASK BIT(31)
>> +#define USB_STS_ENDIAN2(p) ((p) & USB_STS_ENDIAN2_MASK)
>> +
>> +/* USB_CMD - bitmasks */
>> +/* Set Function Address */
>> +#define USB_CMD_SET_ADDR BIT(0)
>> +/*
>> + * Function Address This field is saved to the device only when the field
>> + * SET_ADDR is set '1 ' during write to USB_CMD register.
>> + * Software is responsible for entering the address of the device during
>> + * SET_ADDRESS request service. This field should be set immediately after
>> + * the SETUP packet is decoded, and prior to confirmation of the status phase
>> + */
>> +#define USB_CMD_FADDR_MASK GENMASK(7, 1)
>> +#define USB_CMD_FADDR(p) (((p) << 1) & USB_CMD_FADDR_MASK)
>> +/* Send Function Wake Device Notification TP (used only in SS mode). */
>> +#define USB_CMD_SDNFW BIT(8)
>> +/* Set Test Mode (used only in HS/FS mode). */
>> +#define USB_CMD_STMODE BIT(9)
>> +/* Test mode selector (used only in HS/FS mode) */
>> +#define USB_STS_TMODE_SEL_MASK GENMASK(11, 10)
>> +#define USB_STS_TMODE_SEL(p) (((p) << 10) & USB_STS_TMODE_SEL_MASK)
>> +/*
>> + * Send Latency Tolerance Message Device Notification TP (used only
>> + * in SS mode).
>> + */
>> +#define USB_CMD_SDNLTM BIT(12)
>> +/* Send Custom Transaction Packet (used only in SS mode) */
>> +#define USB_CMD_SPKT BIT(13)
>> +/*Device Notification 'Function Wake' - Interface value (only in SS mode. */
>> +#define USB_CMD_DNFW_INT_MASK GENMASK(23, 16)
>> +#define USB_STS_DNFW_INT(p) (((p) << 16) & USB_CMD_DNFW_INT_MASK)
>> +/*
>> + * Device Notification 'Latency Tolerance Message' -373 BELT value [7:0]
>> + * (used only in SS mode).
>> + */
>> +#define USB_CMD_DNLTM_BELT_MASK GENMASK(27, 16)
>> +#define USB_STS_DNLTM_BELT(p) (((p) << 16) & USB_CMD_DNLTM_BELT_MASK)
>> +
>> +/* USB_ITPN - bitmasks */
>> +/*
>> + * ITP(SS) / SOF (HS/FS) number
>> + * In SS mode this field represent number of last ITP received from host.
>> + * In HS/FS mode this field represent number of last SOF received from host.
>> + */
>> +#define USB_ITPN_MASK GENMASK(13, 0)
>> +#define USB_ITPN(p) ((p) & USB_ITPN_MASK)
>> +
>> +/* USB_LPM - bitmasks */
>> +/* Host Initiated Resume Duration. */
>> +#define USB_LPM_HIRD_MASK GENMASK(3, 0)
>> +#define USB_LPM_HIRD(p) ((p) & USB_LPM_HIRD_MASK)
>> +/* Remote Wakeup Enable (bRemoteWake). */
>> +#define USB_LPM_BRW BIT(4)
>> +
>> +/* USB_IEN - bitmasks */
>> +/* SS connection interrupt enable */
>> +#define USB_IEN_CONIEN BIT(0)
>> +/* SS disconnection interrupt enable. */
>> +#define USB_IEN_DISIEN BIT(1)
>> +/* USB SS warm reset interrupt enable. */
>> +#define USB_IEN_UWRESIEN BIT(2)
>> +/* USB SS hot reset interrupt enable */
>> +#define USB_IEN_UHRESIEN BIT(3)
>> +/* SS link U3 state enter interrupt enable (suspend).*/
>> +#define USB_IEN_U3ENTIEN BIT(4)
>> +/* SS link U3 state exit interrupt enable (wakeup). */
>> +#define USB_IEN_U3EXTIEN BIT(5)
>> +/* SS link U2 state enter interrupt enable.*/
>> +#define USB_IEN_U2ENTIEN BIT(6)
>> +/* SS link U2 state exit interrupt enable.*/
>> +#define USB_IEN_U2EXTIEN BIT(7)
>> +/* SS link U1 state enter interrupt enable.*/
>> +#define USB_IEN_U1ENTIEN BIT(8)
>> +/* SS link U1 state exit interrupt enable.*/
>> +#define USB_IEN_U1EXTIEN BIT(9)
>> +/* ITP/SOF packet detected interrupt enable.*/
>> +#define USB_IEN_ITPIEN BIT(10)
>> +/* Wakeup interrupt enable.*/
>> +#define USB_IEN_WAKEIEN BIT(11)
>> +/* Send Custom Packet interrupt enable.*/
>> +#define USB_IEN_SPKTIEN BIT(12)
>> +/* HS/FS mode connection interrupt enable.*/
>> +#define USB_IEN_CON2IEN BIT(16)
>> +/* HS/FS mode disconnection interrupt enable.*/
>> +#define USB_IEN_DIS2IEN BIT(17)
>> +/* USB reset (HS/FS mode) interrupt enable.*/
>> +#define USB_IEN_U2RESIEN BIT(18)
>> +/* LPM L2 state enter interrupt enable.*/
>> +#define USB_IEN_L2ENTIEN BIT(20)
>> +/* LPM L2 state exit interrupt enable.*/
>> +#define USB_IEN_L2EXTIEN BIT(21)
>> +/* LPM L1 state enter interrupt enable.*/
>> +#define USB_IEN_L1ENTIEN BIT(24)
>> +/* LPM L1 state exit interrupt enable.*/
>> +#define USB_IEN_L1EXTIEN BIT(25)
>> +/* Configuration reset interrupt enable.*/
>> +#define USB_IEN_CFGRESIEN BIT(26)
>> +/* Start of the USB SS warm reset interrupt enable.*/
>> +#define USB_IEN_UWRESSIEN BIT(28)
>> +/* End of the USB SS warm reset interrupt enable.*/
>> +#define USB_IEN_UWRESEIEN BIT(29)
>> +
>> +#define USB_IEN_INIT (USB_IEN_U2RESIEN | USB_ISTS_DIS2I | USB_IEN_CON2IEN \
>> + | USB_IEN_UHRESIEN | USB_IEN_UWRESIEN | USB_IEN_DISIEN \
>> + | USB_IEN_CONIEN | USB_IEN_U3EXTIEN | USB_IEN_L2ENTIEN \
>> + | USB_IEN_L2EXTIEN)
>> +
>> +/* USB_ISTS - bitmasks */
>> +/* SS Connection detected. */
>> +#define USB_ISTS_CONI BIT(0)
>> +/* SS Disconnection detected. */
>> +#define USB_ISTS_DISI BIT(1)
>> +/* UUSB warm reset detectede. */
>> +#define USB_ISTS_UWRESI BIT(2)
>> +/* USB hot reset detected. */
>> +#define USB_ISTS_UHRESI BIT(3)
>> +/* U3 link state enter detected (suspend).*/
>> +#define USB_ISTS_U3ENTI BIT(4)
>> +/* U3 link state exit detected (wakeup). */
>> +#define USB_ISTS_U3EXTI BIT(5)
>> +/* U2 link state enter detected.*/
>> +#define USB_ISTS_U2ENTI BIT(6)
>> +/* U2 link state exit detected.*/
>> +#define USB_ISTS_U2EXTI BIT(7)
>> +/* U1 link state enter detected.*/
>> +#define USB_ISTS_U1ENTI BIT(8)
>> +/* U1 link state exit detected.*/
>> +#define USB_ISTS_U1EXTI BIT(9)
>> +/* ITP/SOF packet detected.*/
>> +#define USB_ISTS_ITPI BIT(10)
>> +/* Wakeup detected.*/
>> +#define USB_ISTS_WAKEI BIT(11)
>> +/* Send Custom Packet detected.*/
>> +#define USB_ISTS_SPKTI BIT(12)
>> +/* HS/FS mode connection detected.*/
>> +#define USB_ISTS_CON2I BIT(16)
>> +/* HS/FS mode disconnection detected.*/
>> +#define USB_ISTS_DIS2I BIT(17)
>> +/* USB reset (HS/FS mode) detected.*/
>> +#define USB_ISTS_U2RESI BIT(18)
>> +/* LPM L2 state enter detected.*/
>> +#define USB_ISTS_L2ENTI BIT(20)
>> +/* LPM L2 state exit detected.*/
>> +#define USB_ISTS_L2EXTI BIT(21)
>> +/* LPM L1 state enter detected.*/
>> +#define USB_ISTS_L1ENTI BIT(24)
>> +/* LPM L1 state exit detected.*/
>> +#define USB_ISTS_L1EXTI BIT(25)
>> +/* USB configuration reset detected.*/
>> +#define USB_ISTS_CFGRESI BIT(26)
>> +/* Start of the USB warm reset detected.*/
>> +#define USB_ISTS_UWRESSI BIT(28)
>> +/* End of the USB warm reset detected.*/
>> +#define USB_ISTS_UWRESEI BIT(29)
>> +
>> +/* USB_SEL - bitmasks */
>> +#define EP_SEL_EPNO_MASK GENMASK(3, 0)
>> +/* Endpoint number. */
>> +#define EP_SEL_EPNO(p) ((p) & EP_SEL_EPNO_MASK)
>> +/* Endpoint direction bit - 0 - OUT, 1 - IN. */
>> +#define EP_SEL_DIR BIT(7)
>> +
>> +#define select_ep_in(nr) (EP_SEL_EPNO(p) | EP_SEL_DIR)
>> +#define select_ep_out (EP_SEL_EPNO(p))
>> +
>> +/* EP_TRADDR - bitmasks */
>> +/* Transfer Ring address. */
>> +#define EP_TRADDR_TRADDR(p) ((p))
>> +
>> +/* EP_CFG - bitmasks */
>> +/* Endpoint enable */
>> +#define EP_CFG_ENABLE BIT(0)
>> +/*
>> + * Endpoint type.
>> + * 1 - isochronous
>> + * 2 - bulk
>> + * 3 - interrupt
>> + */
>> +#define EP_CFG_EPTYPE_MASK GENMASK(2, 1)
>> +#define EP_CFG_EPTYPE(p) (((p) << 1) & EP_CFG_EPTYPE_MASK)
>> +/* Stream support enable (only in SS mode). */
>> +#define EP_CFG_STREAM_EN BIT(3)
>> +/* TDL check (only in SS mode for BULK EP). */
>> +#define EP_CFG_TDL_CHK BIT(4)
>> +/* SID check (only in SS mode for BULK OUT EP). */
>> +#define EP_CFG_SID_CHK BIT(5)
>> +/* DMA transfer endianness. */
>> +#define EP_CFG_EPENDIAN BIT(7)
>> +/* Max burst size (used only in SS mode). */
>> +#define EP_CFG_MAXBURST_MASK GENMASK(11, 8)
>> +#define EP_CFG_MAXBURST(p) (((p) << 8) & EP_CFG_MAXBURST_MASK)
>> +/* ISO max burst. */
>> +#define EP_CFG_MULT_MASK GENMASK(15, 14)
>> +#define EP_CFG_MULT(p) (((p) << 14) & EP_CFG_MULT_MASK)
>> +/* ISO max burst. */
>> +#define EP_CFG_MAXPKTSIZE_MASK GENMASK(26, 16)
>> +#define EP_CFG_MAXPKTSIZE(p) (((p) << 16) & EP_CFG_MAXPKTSIZE_MASK)
>> +/* Max number of buffered packets. */
>> +#define EP_CFG_BUFFERING_MASK GENMASK(31, 27)
>> +#define EP_CFG_BUFFERING(p) (((p) << 27) & EP_CFG_BUFFERING_MASK)
>> +
>> +/* EP_CMD - bitmasks */
>> +/* Endpoint reset. */
>> +#define EP_CMD_EPRST BIT(0)
>> +/* Endpoint STALL set. */
>> +#define EP_CMD_SSTALL BIT(1)
>> +/* Endpoint STALL clear. */
>> +#define EP_CMD_CSTALL BIT(2)
>> +/* Send ERDY TP. */
>> +#define EP_CMD_ERDY BIT(3)
>> +/* Request complete. */
>> +#define EP_CMD_REQ_CMPL BIT(5)
>> +/* Transfer descriptor ready. */
>> +#define EP_CMD_DRDY BIT(6)
>> +/* Data flush. */
>> +#define EP_CMD_DFLUSH BIT(7)
>> +/*
>> + * Transfer Descriptor Length write (used only for Bulk Stream capable
>> + * endpoints in SS mode).
>> + */
>> +#define EP_CMD_STDL BIT(8)
>> +/* Transfer Descriptor Length (used only in SS mode for bulk endpoints). */
>> +#define EP_CMD_TDL_MASK GENMASK(15, 9)
>> +#define EP_CMD_TDL(p) (((p) << 9) & EP_CMD_TDL_MASK)
>> +/* ERDY Stream ID value (used in SS mode). */
>> +#define EP_CMD_ERDY_SID_MASK GENMASK(31, 16)
>> +#define EP_CMD_ERDY_SID(p) (((p) << 16) & EP_CMD_SID_MASK)
>> +
>> +/* EP_STS - bitmasks */
>> +/* Setup transfer complete. */
>> +#define EP_STS_SETUP BIT(0)
>> +/* Endpoint STALL status. */
>> +#define EP_STS_STALL(p) ((p) & BIT(1))
>> +/* Interrupt On Complete. */
>> +#define EP_STS_IOC BIT(2)
>> +/* Interrupt on Short Packet. */
>> +#define EP_STS_ISP BIT(3)
>> +/* Transfer descriptor missing. */
>> +#define EP_STS_DESCMIS BIT(4)
>> +/* Stream Rejected (used only in SS mode) */
>> +#define EP_STS_STREAMR BIT(5)
>> +/* EXIT from MOVE DATA State (used only for stream transfers in SS mode). */
>> +#define EP_STS_MD_EXIT BIT(6)
>> +/* TRB error. */
>> +#define EP_STS_TRBERR BIT(7)
>> +/* Not ready (used only in SS mode). */
>> +#define EP_STS_NRDY BIT(8)
>> +/* DMA busy. */
>> +#define EP_STS_DBUSY(p) ((p) & BIT(9))
>> +/* Endpoint Buffer Empty */
>> +#define EP_STS_BUFFEMPTY(p) ((p) & BIT(10))
>> +/* Current Cycle Status */
>> +#define EP_STS_CCS(p) ((p) & BIT(11))
>> +/* Prime (used only in SS mode. */
>> +#define EP_STS_PRIME BIT(12)
>> +/* Stream error (used only in SS mode). */
>> +#define EP_STS_SIDERR BIT(13)
>> +/* OUT size mismatch. */
>> +#define EP_STS_OUTSMM BIT(14)
>> +/* ISO transmission error. */
>> +#define EP_STS_ISOERR BIT(15)
>> +/* Host Packet Pending (only for SS mode). */
>> +#define EP_STS_HOSTPP(p) ((p) & BIT(16))
>> +/* Stream Protocol State Machine State (only for Bulk stream endpoints). */
>> +#define EP_STS_SPSMST_MASK GENMASK(18, 17)
>> +#define EP_STS_SPSMST_DISABLED(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
>> +#define EP_STS_SPSMST_IDLE(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
>> +#define EP_STS_SPSMST_START_STREAM(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
>> +#define EP_STS_SPSMST_MOVE_DATA(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
>> +/* Interrupt On Transfer complete. */
>> +#define EP_STS_IOT BIT(19)
>> +/* OUT queue endpoint number. */
>> +#define EP_STS_OUTQ_NO_MASK GENMASK(27, 24)
>> +#define EP_STS_OUTQ_NO(p) (((p) & EP_STS_OUTQ_NO_MASK) >> 24)
>> +/* OUT queue valid flag. */
>> +#define EP_STS_OUTQ_VAL_MASK BIT(28)
>> +#define EP_STS_OUTQ_VAL(p) ((p) & EP_STS_OUTQ_VAL_MASK)
>> +/* SETUP WAIT. */
>> +#define EP_STS_STPWAIT BIT(31)
>> +
>> +/* EP_STS_SID - bitmasks */
>> +/* Stream ID (used only in SS mode). */
>> +#define EP_STS_SID_MASK GENMASK(15, 0)
>> +#define EP_STS_SID(p) ((p) & EP_STS_SID_MASK)
>> +
>> +/* EP_STS_EN - bitmasks */
>> +/* SETUP interrupt enable. */
>> +#define EP_STS_EN_SETUPEN BIT(0)
>> +/* OUT transfer missing descriptor enable. */
>> +#define EP_STS_EN_DESCMISEN BIT(4)
>> +/* Stream Rejected enable. */
>> +#define EP_STS_EN_STREAMREN BIT(5)
>> +/* Move Data Exit enable.*/
>> +#define EP_STS_EN_MD_EXITEN BIT(6)
>> +/* TRB enable. */
>> +#define EP_STS_EN_TRBERREN BIT(7)
>> +/* NRDY enable. */
>> +#define EP_STS_EN_NRDYEN BIT(8)
>> +/* Prime enable. */
>> +#define EP_STS_EN_PRIMEEEN BIT(12)
>> +/* Stream error enable. */
>> +#define EP_STS_EN_SIDERREN BIT(13)
>> +/* OUT size mismatch enable. */
>> +#define EP_STS_EN_OUTSMMEN BIT(14)
>> +/* ISO transmission error enable. */
>> +#define EP_STS_EN_ISOERREN BIT(15)
>> +/* Interrupt on Transmission complete enable. */
>> +#define EP_STS_EN_IOTEN BIT(19)
>> +/* Setup Wait interrupt enable. */
>> +#define EP_STS_EN_STPWAITEN BIT(31)
>> +
>> +/* DRBL- bitmasks */
>> +#define DB_VALUE_BY_INDEX(index) (1 << (index))
>> +#define DB_VALUE_EP0_OUT BIT(0)
>> +#define DB_VALUE_EP0_IN BIT(16)
>> +
>> +/* EP_IEN - bitmasks */
>> +#define EP_IEN(index) (1 << (index))
>> +#define EP_IEN_EP_OUT0 BIT(0)
>> +#define EP_IEN_EP_IN0 BIT(16)
>> +
>> +/* EP_ISTS - bitmasks */
>> +#define EP_ISTS(index) (1 << (index))
>> +#define EP_ISTS_EP_OUT0 BIT(0)
>> +#define EP_ISTS_EP_IN0 BIT(16)
>> +
>> +/* EP_PWR- bitmasks */
>> +/*Power Shut Off capability enable*/
>> +#define PUSB_PWR_PSO_EN BIT(0)
>> +/*Power Shut Off capability disable*/
>> +#define PUSB_PWR_PSO_DS BIT(1)
>> +/*
>> + * Enables turning-off Reference Clock.
>> + * This bit is optional and implemented only when support for OTG is
>> + * implemented (indicated by OTG_READY bit set to '1').
>> + */
>> +#define PUSB_PWR_STB_CLK_SWITCH_EN BIT(8)
>> +/*
>> + * Status bit indicating that operation required by STB_CLK_SWITCH_EN write
>> + * is completed
>> + */
>> +#define PUSB_PWR_STB_CLK_SWITCH_DONE BIT(9)
>> +/* This bit informs if Fast Registers Access is enabled. */
>> +#define PUSB_PWR_FST_REG_ACCESS_STAT BIT(30)
>> +/* Fast Registers Access Enable. */
>> +#define PUSB_PWR_FST_REG_ACCESS BIT(31)
>> +
>> +/* USB_CAP1- bitmasks */
>> +/*
>> + * SFR Interface type
>> + * These field reflects type of SFR interface implemented:
>> + * 0x0 - OCP
>> + * 0x1 - AHB,
>> + * 0x2 - PLB
>> + * 0x3 - AXI
>> + * 0x4-0xF - reserved
>> + */
>> +#define USB_CAP1_SFR_TYPE_MASK GENMASK(3, 0)
>> +#define DEV_SFR_TYPE_OCP(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x0)
>> +#define DEV_SFR_TYPE_AHB(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x1)
>> +#define DEV_SFR_TYPE_PLB(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x2)
>> +#define DEV_SFR_TYPE_AXI(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x3)
>> +/*
>> + * SFR Interface width
>> + * These field reflects width of SFR interface implemented:
>> + * 0x0 - 8 bit interface,
>> + * 0x1 - 16 bit interface,
>> + * 0x2 - 32 bit interface
>> + * 0x3 - 64 bit interface
>> + * 0x4-0xF - reserved
>> + */
>> +#define USB_CAP1_SFR_WIDTH_MASK GENMASK(7, 4)
>> +#define DEV_SFR_WIDTH_8(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x0 << 4))
>> +#define DEV_SFR_WIDTH_16(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x1 << 4))
>> +#define DEV_SFR_WIDTH_32(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x2 << 4))
>> +#define DEV_SFR_WIDTH_64(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x3 << 4))
>> +/*
>> + * DMA Interface type
>> + * These field reflects type of DMA interface implemented:
>> + * 0x0 - OCP
>> + * 0x1 - AHB,
>> + * 0x2 - PLB
>> + * 0x3 - AXI
>> + * 0x4-0xF - reserved
>> + */
>> +#define USB_CAP1_DMA_TYPE_MASK GENMASK(11, 8)
>> +#define DEV_DMA_TYPE_OCP(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x0 << 8))
>> +#define DEV_DMA_TYPE_AHB(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x1 << 8))
>> +#define DEV_DMA_TYPE_PLB(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x2 << 8))
>> +#define DEV_DMA_TYPE_AXI(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x3 << 8))
>> +/*
>> + * DMA Interface width
>> + * These field reflects width of DMA interface implemented:
>> + * 0x0 - reserved,
>> + * 0x1 - reserved,
>> + * 0x2 - 32 bit interface
>> + * 0x3 - 64 bit interface
>> + * 0x4-0xF - reserved
>> + */
>> +#define USB_CAP1_DMA_WIDTH_MASK GENMASK(15, 12)
>> +#define DEV_DMA_WIDTH_32(p) (((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x2 << 12))
>> +#define DEV_DMA_WIDTH_64(p) (((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x3 << 12))
>> +/*
>> + * USB3 PHY Interface type
>> + * These field reflects type of USB3 PHY interface implemented:
>> + * 0x0 - USB PIPE,
>> + * 0x1 - RMMI,
>> + * 0x2-0xF - reserved
>> + */
>> +#define USB_CAP1_U3PHY_TYPE_MASK GENMASK(19, 16)
>> +#define DEV_U3PHY_PIPE(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x0 << 16))
>> +#define DEV_U3PHY_RMMI(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x1 << 16))
>> +/*
>> + * USB3 PHY Interface width
>> + * These field reflects width of USB3 PHY interface implemented:
>> + * 0x0 - 8 bit PIPE interface,
>> + * 0x1 - 16 bit PIPE interface,
>> + * 0x2 - 32 bit PIPE interface,
>> + * 0x3 - 64 bit PIPE interface
>> + * 0x4-0xF - reserved
>> + * Note: When SSIC interface is implemented this field shows the width of
>> + * internal PIPE interface. The RMMI interface is always 20bit wide.
>> + */
>> +#define USB_CAP1_U3PHY_WIDTH_MASK GENMASK(23, 20)
>> +#define DEV_U3PHY_WIDTH_8(p) \
>> + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x0 << 20))
>> +#define DEV_U3PHY_WIDTH_16(p) \
>> + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x1 << 16))
>> +#define DEV_U3PHY_WIDTH_32(p) \
>> + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x2 << 20))
>> +#define DEV_U3PHY_WIDTH_64(p) \
>> + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x3 << 16))
>> +
>> +/*
>> + * USB2 PHY Interface enable
>> + * These field informs if USB2 PHY interface is implemented:
>> + * 0x0 - interface NOT implemented,
>> + * 0x1 - interface implemented
>> + */
>> +#define USB_CAP1_U2PHY_EN(p) ((p) & BIT(24))
>> +/*
>> + * USB2 PHY Interface type
>> + * These field reflects type of USB2 PHY interface implemented:
>> + * 0x0 - UTMI,
>> + * 0x1 - ULPI
>> + */
>> +#define DEV_U2PHY_ULPI(p) ((p) & BIT(25))
>> +/*
>> + * USB2 PHY Interface width
>> + * These field reflects width of USB2 PHY interface implemented:
>> + * 0x0 - 8 bit interface,
>> + * 0x1 - 16 bit interface,
>> + * Note: The ULPI interface is always 8bit wide.
>> + */
>> +#define DEV_U2PHY_WIDTH_16(p) ((p) & BIT(26))
>> +/*
>> + * OTG Ready
>> + * 0x0 - pure device mode
>> + * 0x1 - some features and ports for CDNS USB OTG controller are implemented.
>> + */
>> +#define USB_CAP1_OTG_READY(p) ((p) & BIT(27))
>> +
>> +/* USB_CAP2- bitmasks */
>> +/*
>> + * The actual size of the connected On-chip RAM memory in kB:
>> + * - 0 means 256 kB (max supported mem size)
>> + * - value other than 0 reflects the mem size in kB
>> + */
>> +#define USB_CAP2_ACTUAL_MEM_SIZE(p) ((p) & GENMASK(7, 0))
>> +/*
>> + * Max supported mem size
>> + * These field reflects width of on-chip RAM address bus width,
>> + * which determines max supported mem size:
>> + * 0x0-0x7 - reserved,
>> + * 0x8 - support for 4kB mem,
>> + * 0x9 - support for 8kB mem,
>> + * 0xA - support for 16kB mem,
>> + * 0xB - support for 32kB mem,
>> + * 0xC - support for 64kB mem,
>> + * 0xD - support for 128kB mem,
>> + * 0xE - support for 256kB mem,
>> + * 0xF - reserved
>> + */
>> +#define USB_CAP2_MAX_MEM_SIZE(p) ((p) & GENMASK(11, 8))
>> +
>> +/* USB_CAP3- bitmasks */
>> +#define EP_IS_IMPLEMENTED(reg, index) ((reg) & (1 << (index)))
>> +
>> +/* USB_CAP4- bitmasks */
>> +#define EP_SUPPORT_ISO(reg, index) ((reg) & (1 << (index)))
>> +
>> +/* USB_CAP5- bitmasks */
>> +#define EP_SUPPORT_STREAM(reg, index) ((reg) & (1 << (index)))
>> +
>> +/* USB_CAP6- bitmasks */
>> +/* The USBSS-DEV Controller Internal build number. */
>> +#define GET_DEV_VERSION__INTERNAL_NUMBER(p) ((p) & GENMASK(7, 0))
>> +/* The USBSS-DEV Controller version number. */
>> +#define GET_DEV_VERSION(p) ((p) & GENMASK(31, 8))
>> +
>> +/* DBG_LINK1- bitmasks */
>> +/*
>> + * LFPS_MIN_DET_U1_EXIT value This parameter configures the minimum
>> + * time required for decoding the received LFPS as an LFPS.U1_Exit.
>> + */
>> +#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT(p) ((p) & GENMASK(7, 0))
>> +/*
>> + * LFPS_MIN_GEN_U1_EXIT value This parameter configures the minimum time for
>> + * phytxelecidle deassertion when LFPS.U1_Exit
>> + */
>> +#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_MASK GENMASK(15, 8)
>> +#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(p) (((p) << 8) & GENMASK(15, 8))
>> +/*
>> + * RXDET_BREAK_DIS value This parameter configures terminating the Far-end
>> + * Receiver termination detection sequence:
>> + * 0: it is possible that USBSS_DEV will terminate Farend receiver
>> + * termination detection sequence
>> + * 1: USBSS_DEV will not terminate Far-end receiver termination
>> + * detection sequence
>> + */
>> +#define DBG_LINK1_RXDET_BREAK_DIS BIT(16)
>> +/* LFPS_GEN_PING value This parameter configures the LFPS.Ping generation */
>> +#define DBG_LINK1_LFPS_GEN_PING(p) (((p) << 17) & GENMASK(21, 17))
>> +/*
>> + * Set the LFPS_MIN_DET_U1_EXIT value Writing '1' to this bit writes the
>> + * LFPS_MIN_DET_U1_EXIT field value to the device. This bit is automatically
>> + * cleared. Writing '0' has no effect
>> + */
>> +#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT_SET BIT(24)
>> +/*
>> + * Set the LFPS_MIN_GEN_U1_EXIT value. Writing '1' to this bit writes the
>> + * LFPS_MIN_GEN_U1_EXIT field value to the device. This bit is automatically
>> + * cleared. Writing '0' has no effect
>> + */
>> +#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET BIT(25)
>> +/*
>> + * Set the RXDET_BREAK_DIS value Writing '1' to this bit writes
>> + * the RXDET_BREAK_DIS field value to the device. This bit is automatically
>> + * cleared. Writing '0' has no effect
>> + */
>> +#define DBG_LINK1_RXDET_BREAK_DIS_SET BIT(26)
>> +/*
>> + * Set the LFPS_GEN_PING_SET value Writing '1' to this bit writes
>> + * the LFPS_GEN_PING field value to the device. This bit is automatically
>> + * cleared. Writing '0' has no effect."
>> + */
>> +#define DBG_LINK1_LFPS_GEN_PING_SET BIT(27)
>> +
>> +#define gadget_to_cdns3_device(g) (container_of(g, struct cdns3_device, gadget))
>> +
>> +#define ep_to_cdns3_ep(ep) (container_of(ep, struct cdns3_endpoint, endpoint))
>> +
>> +/*-------------------------------------------------------------------------*/
>> +/*
>> + * USBSS-DEV DMA interface.
>> + */
>> +#define TRBS_PER_SEGMENT 40
>> +
>> +#define ISO_MAX_INTERVAL 10
>> +
>> +/*
>> + *Only for ISOC endpoints - maximum number of TRBs is calculated as
>> + * pow(2, bInterval-1) * number of usb requests. It is limitation made by
>> + * driver to save memory. Controller must prepare TRB for each ITP even
>> + * if bInterval > 1. It's the reason why driver needs so many TRBs for
>> + * isochronous endpoints.
>> + */
>> +#define TRBS_PER_ISOC_SEGMENT (ISO_MAX_INTERVAL * 8)
>> +
>> +#define GET_TRBS_PER_SEGMENT(ep_type) ((ep_type) == USB_ENDPOINT_XFER_ISOC ? \
>> + TRBS_PER_ISOC_SEGMENT : TRBS_PER_SEGMENT)
>> +/**
>> + * struct cdns3_trb - represent Transfer Descriptor block.
>> + * @buffer: pointer to buffer data
>> + * @length: length of data
>> + * @control: control flags.
>> + *
>> + * This structure describes transfer block serviced by DMA module.
>> + */
>> +struct cdns3_trb {
>> + __le32 buffer;
>> + __le32 length;
>> + __le32 control;
>> +};
>> +
>> +#define TRB_SIZE (sizeof(struct cdns3_trb))
>> +#define TRB_RING_SIZE (TRB_SIZE * TRBS_PER_SEGMENT)
>> +#define TRB_ISO_RING_SIZE (TRB_SIZE * TRBS_PER_ISOC_SEGMENT)
>> +#define TRB_CTRL_RING_SIZE (TRB_SIZE * 2)
>> +
>> +/* 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 */
>> +/* 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)
>> +/*Setting this bit enables FIFO DMA operation mode*/
>> +#define TRB_FIFO_MODE BIT(3)
>> +/* Set PCIe no snoop attribute */
>> +#define TRB_CHAIN BIT(4)
>> +/* Interrupt on completion */
>> +#define TRB_IOC BIT(5)
>> +
>> +/* stream ID bitmasks. */
>> +#define TRB_STREAM_ID(p) ((p) & GENMASK(31, 16))
>> +
>> +/* transfer_len bitmasks. */
>> +#define TRB_LEN(p) ((p) & GENMASK(16, 0))
>> +
>> +/* transfer_len bitmasks - bits 31:24 */
>> +#define TRB_BURST_LEN(p) ((p) & GENMASK(31, 24))
>> +
>> +/* Data buffer pointer bitmasks*/
>> +#define TRB_BUFFER(p) ((p) & GENMASK(31, 0))
>> +
>> +/*-------------------------------------------------------------------------*/
>> +/* Driver numeric constants */
>> +
>> +/* Such declaration should be added to ch9.h */
>> +#define USB_DEVICE_MAX_ADDRESS 127
>> +
>> +/* Endpoint init values */
>> +#define CDNS3_EP_MAX_PACKET_LIMIT 1024
>> +#define CDNS3_EP_MAX_STREAMS 15
>> +#define CDNS3_EP0_MAX_PACKET_LIMIT 512
>> +
>> +/* All endpoints including EP0 */
>> +#define CDNS3_ENDPOINTS_MAX_COUNT 32
>> +#define CDNS3_EP_ZLP_BUF_SIZE 1024
>> +
>> +#define CDNS3_EP_BUF_SIZE 2 /* KB */
>> +#define CDNS3_ALIGNED_BUF_SIZE 16384 /* Bytes */
>> +#define CDNS3_MAX_NUM_DESCMISS_BUF 32
>> +#define CDNS3_DESCMIS_BUF_SIZE 2048 /* Bytes */
>> +/*-------------------------------------------------------------------------*/
>> +/* Used structs */
>> +
>> +struct cdns3_device;
>> +
>> +/**
>> + * struct cdns3_endpoint - extended device side representation of USB endpoint.
>> + * @endpoint: usb endpoint
>> + * @pending_req_list: list of requests queuing on transfer ring.
>> + * @deferred_req_list: list of requests waiting for queuing on transfer ring.
>> + * @trb_pool: transfer ring - array of transaction buffers
>> + * @trb_pool_dma: dma address of transfer ring
>> + * @cdns3_dev: device associated with this endpoint
>> + * @name: a human readable name e.g. ep1out
>> + * @flags: specify the current state of endpoint
>> + * @descmis_req: internal transfer object used for getting data from on-chip
>> + * buffer. It can happen only if function driver doesn't send usb_request
>> + * object on time.
>> + * @aligned_buff: aligned to 8 bytes data buffer. Buffer address used in
>> + * TRB shall be aligned to 8.
>> + * @aligned_dma_addr: dma address of aligned_buff
>> + * @dir: endpoint direction
>> + * @num: endpoint number (1 - 15)
>> + * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
>> + * @interval: interval between packets used for ISOC endpoint.
>> + * @free_trbs: number of free TRBs in transfer ring
>> + * @num_trbs: number of all 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 cdns3_endpoint {
>> + struct usb_ep endpoint;
>> + struct list_head pending_req_list;
>> + struct list_head deferred_req_list;
>> +
>> + struct cdns3_trb *trb_pool;
>> + dma_addr_t trb_pool_dma;
>> +
>> + struct cdns3_device *cdns3_dev;
>> + char name[20];
>> +
>> +#define EP_ENABLED BIT(0)
>> +#define EP_STALL BIT(1)
>> +#define EP_WEDGE BIT(2)
>> +#define EP_TRANSFER_STARTED BIT(3)
>> +#define EP_UPDATE_EP_TRBADDR BIT(4)
>> +#define EP_PENDING_REQUEST BIT(5)
>> +#define EP_RING_FULL BIT(6)
>> +#define EP_CLAIMED BIT(7)
>> +
>> + u32 flags;
>> +
>> + struct cdns3_request *descmis_req;
>> +
>> + void *aligned_buff;
>> + dma_addr_t aligned_dma_addr;
>> + u8 dir;
>> + u8 num;
>> + u8 type;
>> + int interval;
>> +
>> + int free_trbs;
>> + int num_trbs;
>> + u8 pcs;
>> + u8 ccs;
>> + int enqueue;
>> + int dequeue;
>> +
>> + unsigned int wa1_set:1;
>> + struct cdns3_trb *wa1_trb;
>> + unsigned int wa1_cycle_bit:1;
>> +};
>> +
>> +/**
>> + * struct cdns3_request - extended device side representation of usb_request
>> + * object .
>> + * @request: generic usb_request object describing single I/O request.
>> + * @priv_ep: 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
>> + * @flags: flag specifying special usage of request
>> + */
>> +struct cdns3_request {
>> + struct usb_request request;
>> + struct cdns3_endpoint *priv_ep;
>> + struct cdns3_trb *trb;
>> + int start_trb;
>> + int end_trb;
>> +#define REQUEST_PENDING BIT(0)
>> +#define REQUEST_INTERNAL BIT(1)
>> +#define REQUEST_INTERNAL_CH BIT(2)
>> +#define REQUEST_ZLP BIT(3)
>> + u32 flags;
>> +};
>> +
>> +#define to_cdns3_request(r) (container_of(r, struct cdns3_request, request))
>> +
>> +/*Stages used during enumeration process.*/
>> +#define CDNS3_SETUP_STAGE 0x0
>> +#define CDNS3_DATA_STAGE 0x1
>> +#define CDNS3_STATUS_STAGE 0x2
>> +
>> +/**
>> + * struct cdns3_device - represent USB device.
>> + * @dev: pointer to device structure associated whit this controller
>> + * @sysdev: pointer to the DMA capable device
>> + * @gadget: device side representation of the peripheral controller
>> + * @gadget_driver: pointer to the gadget driver
>> + * @dev_ver: device controller version.
>> + * @lock: for synchronizing
>> + * @regs: base address for device side registers
>> + * @setup_buf: used while processing usb control requests
>> + * @setup_dma: dma address for setup_buf
>> + * @zlp_buf - zlp buffer
>> + * @ep0_stage: ep0 stage during enumeration process.
>> + * @ep0_data_dir: direction for control transfer
>> + * @eps: array of pointers to all endpoints with exclusion ep0
>> + * @selected_ep: actually selected endpoint. It's used only to improve
>> + * performance.
>> + * @isoch_delay: value from Set Isoch Delay request. Only valid on SS/SSP.
>> + * @u1_allowed: allow device transition to u1 state
>> + * @u2_allowed: allow device transition to u2 state
>> + * @is_selfpowered: device is self powered
>> + * @setup_pending: setup packet is processing by gadget driver
>> + * @hw_configured_flag: hardware endpoint configuration was set.
>> + * @wake_up_flag: allow device to remote up the host
>> + * @status_completion_no_call: indicate that driver is waiting for status s
>> + * stage completion. It's used in deferred SET_CONFIGURATION request.
>> + * @onchip_mem_allocated_size: actual size of on-chip memory assigned
>> + * to endpoints
>> + * @pending_status_wq: workqueue handling status stage for deferred requests.
>> + * @shadow_ep_en: hold information about endpoints that will be enabled
>> + * in soft irq.
>> + * @pending_status_request: request for which status stage was deferred
>> + */
>> +struct cdns3_device {
>> + struct device *dev;
>> + struct device *sysdev;
>> +
>> + struct usb_gadget gadget;
>> + struct usb_gadget_driver *gadget_driver;
>> +
>> +#define CDNS_REVISION_V0 0x00024501
>> +#define CDNS_REVISION_V1 0x00024509
>> + u32 dev_ver;
>> +
>> + /* generic spin-lock for drivers */
>> + spinlock_t lock;
>> +
>> + struct cdns3_usb_regs __iomem *regs;
>> +
>> + struct usb_ctrlrequest *setup_buf;
>> + dma_addr_t setup_dma;
>> + void *zlp_buf;
>> +
>> + u8 ep0_stage;
>> + int ep0_data_dir;
>> +
>> + struct cdns3_endpoint *eps[CDNS3_ENDPOINTS_MAX_COUNT];
>> +
>> + u32 selected_ep;
>> + u16 isoch_delay;
>> +
>> + unsigned u1_allowed:1;
>> + unsigned u2_allowed:1;
>> + unsigned is_selfpowered:1;
>> + unsigned setup_pending:1;
>> + int hw_configured_flag:1;
>> + int wake_up_flag:1;
>> + unsigned status_completion_no_call:1;
>> +
>> + struct work_struct pending_status_wq;
>> + struct usb_request *pending_status_request;
>> + u32 shadow_ep_en;
>> + /*in KB */
>> + int onchip_mem_allocated_size;
>> +};
>> +
>> +int cdns3_handshake(void __iomem *ptr, u32 mask, u32 done, int usec);
>> +void cdns3_set_register_bit(void __iomem *ptr, u32 mask);
>> +dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
>> + struct cdns3_trb *trb);
>> +enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev);
>> +void cdns3_pending_setup_status_handler(struct work_struct *work);
>> +void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev);
>> +void cdns3_set_hw_configuration(struct cdns3_device *priv_dev);
>> +void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep);
>> +void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable);
>> +struct usb_request *cdns3_next_request(struct list_head *list);
>> +int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
>> + struct usb_request *request);
>> +void cdns3_rearm_transfer(struct cdns3_endpoint *priv_ep, u8 rearm);
>> +int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep);
>> +u8 cdns3_ep_addr_to_index(u8 ep_addr);
>> +int cdns3_gadget_ep_set_wedge(struct usb_ep *ep);
>> +int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value);
>> +struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep,
>> + gfp_t gfp_flags);
>> +void cdns3_gadget_ep_free_request(struct usb_ep *ep,
>> + struct usb_request *request);
>> +int cdns3_gadget_ep_dequeue(struct usb_ep *ep, struct usb_request *request);
>> +void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
>> + struct cdns3_request *priv_req,
>> + int status);
>> +
>> +int cdns3_init_ep0(struct cdns3_device *priv_dev,
>> + struct cdns3_endpoint *priv_ep);
>> +void cdns3_ep0_config(struct cdns3_device *priv_dev);
>> +void cdns3_ep_config(struct cdns3_endpoint *priv_ep);
>> +void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir);
>> +
>> +#endif /* __LINUX_CDNS3_GADGET */
>> diff --git a/drivers/usb/cdns3/host-export.h b/drivers/usb/cdns3/host-export.h
>> new file mode 100644
>> index 000000000000..b498a170b7e8
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/host-export.h
>> @@ -0,0 +1,28 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Cadence USBSS DRD Driver - Host Export APIs
>> + *
>> + * Copyright (C) 2017-2018 NXP
>> + *
>> + * Authors: Peter Chen <peter.chen@nxp.com>
>> + */
>> +#ifndef __LINUX_CDNS3_HOST_EXPORT
>> +#define __LINUX_CDNS3_HOST_EXPORT
>> +
>> +#ifdef CONFIG_USB_CDNS3_HOST
>> +
>> +int cdns3_host_init(struct cdns3 *cdns);
>> +void cdns3_host_exit(struct cdns3 *cdns);
>> +
>> +#else
>> +
>> +static inline int cdns3_host_init(struct cdns3 *cdns)
>> +{
>> + return -ENXIO;
>> +}
>> +
>> +static inline void cdns3_host_exit(struct cdns3 *cdns) { }
>> +
>> +#endif /* CONFIG_USB_CDNS3_HOST */
>> +
>> +#endif /* __LINUX_CDNS3_HOST_EXPORT */
>> diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
>> new file mode 100644
>> index 000000000000..b43b0236a885
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/host.c
>> @@ -0,0 +1,72 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Cadence USBSS DRD Driver - host side
>> + *
>> + * Copyright (C) 2018 Cadence Design Systems.
>> + * Copyright (C) 2017-2018 NXP
>> + *
>> + * Authors: Peter Chen <peter.chen@nxp.com>
>> + * Pawel Laszczak <pawell@cadence.com>
>> + */
>> +
>> +#include <linux/platform_device.h>
>> +#include "core.h"
>> +
>> +static int __cdns3_host_init(struct cdns3 *cdns)
>> +{
>> + struct platform_device *xhci;
>> + int ret;
>> +
>> + xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
>> + if (!xhci) {
>> + dev_err(cdns->dev, "couldn't allocate xHCI device\n");
>> + return -ENOMEM;
>> + }
>> +
>> + xhci->dev.parent = cdns->dev;
>> + cdns->host_dev = xhci;
>> +
>> + ret = platform_device_add_resources(xhci, cdns->xhci_res,
>> + CDNS3_XHCI_RESOURCES_NUM);
>> + if (ret) {
>> + dev_err(cdns->dev, "couldn't add resources to xHCI device\n");
>> + goto err1;
>> + }
>> +
>> + ret = platform_device_add(xhci);
>> + if (ret) {
>> + dev_err(cdns->dev, "failed to register xHCI device\n");
>> + goto err1;
>> + }
>> +
>> + return 0;
>> +err1:
>> + platform_device_put(xhci);
>> + return ret;
>> +}
>> +
>> +static void cdns3_host_exit(struct cdns3 *cdns)
>> +{
>> + platform_device_unregister(cdns->host_dev);
>> + cdns->host_dev = NULL;
>> +}
>> +
>> +int cdns3_host_init(struct cdns3 *cdns)
>> +{
>> + struct cdns3_role_driver *rdrv;
>> +
>> + rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
>> + if (!rdrv)
>> + return -ENOMEM;
>> +
>> + rdrv->start = __cdns3_host_init;
>> + rdrv->stop = cdns3_host_exit;
>> + rdrv->state = CDNS3_ROLE_STATE_INACTIVE;
>> + rdrv->suspend = NULL;
>> + rdrv->resume = NULL;
>> + rdrv->name = "host";
>> +
>> + cdns->roles[CDNS3_ROLE_HOST] = rdrv;
>> +
>> + return 0;
>> +}
>> diff --git a/drivers/usb/cdns3/trace.c b/drivers/usb/cdns3/trace.c
>> new file mode 100644
>> index 000000000000..9431eb86d4ff
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/trace.c
>> @@ -0,0 +1,23 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * USBSS device controller driver Trace Support
>> + *
>> + * Copyright (C) 2018 Cadence.
>> + *
>> + * Author: Pawel Laszczak <pawell@cadence.com>
>> + */
>> +
>> +#define CREATE_TRACE_POINTS
>> +#include "trace.h"
>> +
>> +void cdns3_dbg(struct cdns3_device *priv_dev, const char *fmt, ...)
>> +{
>> + struct va_format vaf;
>> + va_list args;
>> +
>> + va_start(args, fmt);
>> + vaf.fmt = fmt;
>> + vaf.va = &args;
>> + trace_cdns3_log(priv_dev, &vaf);
>> + va_end(args);
>> +}
>> diff --git a/drivers/usb/cdns3/trace.h b/drivers/usb/cdns3/trace.h
>> new file mode 100644
>> index 000000000000..a6bbf91c616b
>> --- /dev/null
>> +++ b/drivers/usb/cdns3/trace.h
>> @@ -0,0 +1,404 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * USBSS device controller driver.
>> + * Trace support header file.
>> + *
>> + * Copyright (C) 2018 Cadence.
>> + *
>> + * Author: Pawel Laszczak <pawell@cadence.com>
>> + */
>> +
>> +#undef TRACE_SYSTEM
>> +#define TRACE_SYSTEM cdns3
>> +
>> +#if !defined(__LINUX_CDNS3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
>> +#define __LINUX_CDNS3_TRACE
>> +
>> +#include <linux/types.h>
>> +#include <linux/tracepoint.h>
>> +#include <asm/byteorder.h>
>> +#include <linux/usb/ch9.h>
>> +#include "core.h"
>> +#include "gadget.h"
>> +#include "debug.h"
>> +
>> +#define CDNS3_MSG_MAX 500
>> +
>> +TRACE_EVENT(cdns3_log,
>> + TP_PROTO(struct cdns3_device *priv_dev, struct va_format *vaf),
>> + TP_ARGS(priv_dev, vaf),
>> + TP_STRUCT__entry(
>> + __string(name, dev_name(priv_dev->dev))
>> + __dynamic_array(char, msg, CDNS3_MSG_MAX)
>> + ),
>> + TP_fast_assign(
>> + __assign_str(name, dev_name(priv_dev->dev));
>> + vsnprintf(__get_str(msg), CDNS3_MSG_MAX, vaf->fmt, *vaf->va);
>> + ),
>> + TP_printk("%s: %s", __get_str(name), __get_str(msg))
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_doorbell,
>> + TP_PROTO(const char *ep_name, u32 ep_trbaddr),
>> + TP_ARGS(ep_name, ep_trbaddr),
>> + TP_STRUCT__entry(
>> + __string(name, ep_name)
>> + __field(u32, ep_trbaddr)
>> + ),
>> + TP_fast_assign(
>> + __assign_str(name, ep_name);
>> + __entry->ep_trbaddr = ep_trbaddr;
>> + ),
>> + TP_printk("//Ding Dong %s, ep_trbaddr %08x", __get_str(name),
>> + __entry->ep_trbaddr)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_ep0,
>> + TP_PROTO(const char *ep_name, u32 ep_trbaddr),
>> + TP_ARGS(ep_name, ep_trbaddr)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_epx,
>> + TP_PROTO(const char *ep_name, u32 ep_trbaddr),
>> + TP_ARGS(ep_name, ep_trbaddr)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_usb_irq,
>> + TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists),
>> + TP_ARGS(priv_dev, usb_ists),
>> + TP_STRUCT__entry(
>> + __field(enum usb_device_speed, speed)
>> + __field(u32, usb_ists)
>> + __dynamic_array(char, str, CDNS3_MSG_MAX)
>> + ),
>> + TP_fast_assign(
>> + __entry->speed = cdns3_get_speed(priv_dev);
>> + __entry->usb_ists = usb_ists;
>> + ),
>> + TP_printk("%s", cdns3_decode_usb_irq(__get_str(str), __entry->speed,
>> + __entry->usb_ists))
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_usb_irq, cdns3_usb_irq,
>> + TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists),
>> + TP_ARGS(priv_dev, usb_ists)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_epx_irq,
>> + TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep),
>> + TP_ARGS(priv_dev, priv_ep),
>> + TP_STRUCT__entry(
>> + __string(ep_name, priv_ep->name)
>> + __field(u32, ep_sts)
>> + __field(u32, ep_traddr)
>> + __dynamic_array(char, str, CDNS3_MSG_MAX)
>> + ),
>> + TP_fast_assign(
>> + __assign_str(ep_name, priv_ep->name);
>> + __entry->ep_sts = readl(&priv_dev->regs->ep_sts);
>> + __entry->ep_traddr = readl(&priv_dev->regs->ep_traddr);
>> + ),
>> + TP_printk("%s, ep_traddr: %08x",
>> + cdns3_decode_epx_irq(__get_str(str),
>> + __get_str(ep_name),
>> + __entry->ep_sts),
>> + __entry->ep_traddr)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_epx_irq, cdns3_epx_irq,
>> + TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep),
>> + TP_ARGS(priv_dev, priv_ep)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_ep0_irq,
>> + TP_PROTO(struct cdns3_device *priv_dev, u32 ep_sts),
>> + TP_ARGS(priv_dev, ep_sts),
>> + TP_STRUCT__entry(
>> + __field(int, ep_dir)
>> + __field(u32, ep_sts)
>> + __dynamic_array(char, str, CDNS3_MSG_MAX)
>> + ),
>> + TP_fast_assign(
>> + __entry->ep_dir = priv_dev->ep0_data_dir;
>> + __entry->ep_sts = ep_sts;
>> + ),
>> + TP_printk("%s", cdns3_decode_ep0_irq(__get_str(str),
>> + __entry->ep_dir,
>> + __entry->ep_sts))
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_ep0_irq, cdns3_ep0_irq,
>> + TP_PROTO(struct cdns3_device *priv_dev, u32 ep_sts),
>> + TP_ARGS(priv_dev, ep_sts)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_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)
>> + __dynamic_array(char, str, CDNS3_MSG_MAX)
>> + ),
>> + 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_str(str), CDNS3_MSG_MAX,
>> + __entry->bRequestType,
>> + __entry->bRequest, __entry->wValue,
>> + __entry->wIndex, __entry->wLength)
>> + )
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_ctrl, cdns3_ctrl_req,
>> + TP_PROTO(struct usb_ctrlrequest *ctrl),
>> + TP_ARGS(ctrl)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_request,
>> + TP_PROTO(struct cdns3_request *req),
>> + TP_ARGS(req),
>> + TP_STRUCT__entry(
>> + __string(name, req->priv_ep->name)
>> + __field(struct cdns3_request *, req)
>> + __field(unsigned int, actual)
>> + __field(unsigned int, length)
>> + __field(int, status)
>> + __field(int, zero)
>> + __field(int, short_not_ok)
>> + __field(int, no_interrupt)
>> + __field(int, start_trb)
>> + __field(int, end_trb)
>> + __field(struct cdns3_trb *, start_trb_addr)
>> + __field(int, flags)
>> + ),
>> + TP_fast_assign(
>> + __assign_str(name, req->priv_ep->name);
>> + __entry->req = req;
>> + __entry->actual = req->request.actual;
>> + __entry->length = req->request.length;
>> + __entry->status = req->request.status;
>> + __entry->zero = req->request.zero;
>> + __entry->short_not_ok = req->request.short_not_ok;
>> + __entry->no_interrupt = req->request.no_interrupt;
>> + __entry->start_trb = req->start_trb;
>> + __entry->end_trb = req->end_trb;
>> + __entry->start_trb_addr = req->trb;
>> + __entry->flags = req->flags;
>> + ),
>> + TP_printk("%s: req: %p, length: %u/%u %s%s%s, status: %d,"
>> + " trb: [start:%d, end:%d: virt addr %pa], flags:%x ",
>> + __get_str(name), __entry->req, __entry->actual, __entry->length,
>> + __entry->zero ? "zero | " : "",
>> + __entry->short_not_ok ? "short | " : "",
>> + __entry->no_interrupt ? "no int" : "",
>> + __entry->status,
>> + __entry->start_trb,
>> + __entry->end_trb,
>> + __entry->start_trb_addr,
>> + __entry->flags
>> + )
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_request, cdns3_alloc_request,
>> + TP_PROTO(struct cdns3_request *req),
>> + TP_ARGS(req)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_request, cdns3_free_request,
>> + TP_PROTO(struct cdns3_request *req),
>> + TP_ARGS(req)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_request, cdns3_ep_queue,
>> + TP_PROTO(struct cdns3_request *req),
>> + TP_ARGS(req)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_request, cdns3_ep_dequeue,
>> + TP_PROTO(struct cdns3_request *req),
>> + TP_ARGS(req)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_request, cdns3_gadget_giveback,
>> + TP_PROTO(struct cdns3_request *req),
>> + TP_ARGS(req)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_trb,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
>> + TP_ARGS(priv_ep, trb),
>> + TP_STRUCT__entry(
>> + __string(name, priv_ep->name)
>> + __field(struct cdns3_trb *, trb)
>> + __field(u32, buffer)
>> + __field(u32, length)
>> + __field(u32, control)
>> + __field(u32, type)
>> + ),
>> + TP_fast_assign(
>> + __assign_str(name, priv_ep->name);
>> + __entry->trb = trb;
>> + __entry->buffer = trb->buffer;
>> + __entry->length = trb->length;
>> + __entry->control = trb->control;
>> + __entry->type = usb_endpoint_type(priv_ep->endpoint.desc);
>> + ),
>> + TP_printk("%s: trb %pa, dma buf: 0x%08x, size: %ld, ctrl: 0x%08x (%s%s%s%s%s%s%s)",
>> + __get_str(name), __entry->trb, __entry->buffer,
>> + TRB_LEN(__entry->length), __entry->control,
>> + __entry->control & TRB_CYCLE ? "C=1, " : "C=0, ",
>> + __entry->control & TRB_TOGGLE ? "T=1, " : "T=0, ",
>> + __entry->control & TRB_ISP ? "ISP, " : "",
>> + __entry->control & TRB_FIFO_MODE ? "FIFO, " : "",
>> + __entry->control & TRB_CHAIN ? "CHAIN, " : "",
>> + __entry->control & TRB_IOC ? "IOC, " : "",
>> + TRB_FIELD_TO_TYPE(__entry->control) == TRB_NORMAL ? "Normal" : "LINK"
>> + )
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_trb, cdns3_prepare_trb,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
>> + TP_ARGS(priv_ep, trb)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_trb, cdns3_complete_trb,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
>> + TP_ARGS(priv_ep, trb)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_ring,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep),
>> + TP_ARGS(priv_ep),
>> + TP_STRUCT__entry(
>> + __dynamic_array(u8, ring, TRB_RING_SIZE)
>> + __dynamic_array(u8, priv_ep, sizeof(struct cdns3_endpoint))
>> + __dynamic_array(char, buffer,
>> + (TRBS_PER_SEGMENT * 65) + CDNS3_MSG_MAX)
>> + ),
>> + TP_fast_assign(
>> + memcpy(__get_dynamic_array(priv_ep), priv_ep,
>> + sizeof(struct cdns3_endpoint));
>> + memcpy(__get_dynamic_array(ring), priv_ep->trb_pool,
>> + TRB_RING_SIZE);
>> + ),
>> +
>> + TP_printk("%s",
>> + cdns3_dbg_ring((struct cdns3_endpoint *)__get_str(priv_ep),
>> + (struct cdns3_trb *)__get_str(ring),
>> + __get_str(buffer)))
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_ring, cdns3_ring,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep),
>> + TP_ARGS(priv_ep)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_ep,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep),
>> + TP_ARGS(priv_ep),
>> + TP_STRUCT__entry(
>> + __string(name, priv_ep->name)
>> + __field(unsigned int, maxpacket)
>> + __field(unsigned int, maxpacket_limit)
>> + __field(unsigned int, max_streams)
>> + __field(unsigned int, maxburst)
>> + __field(unsigned int, flags)
>> + __field(unsigned int, dir)
>> + __field(u8, enqueue)
>> + __field(u8, dequeue)
>> + ),
>> + TP_fast_assign(
>> + __assign_str(name, priv_ep->name);
>> + __entry->maxpacket = priv_ep->endpoint.maxpacket;
>> + __entry->maxpacket_limit = priv_ep->endpoint.maxpacket_limit;
>> + __entry->max_streams = priv_ep->endpoint.max_streams;
>> + __entry->maxburst = priv_ep->endpoint.maxburst;
>> + __entry->flags = priv_ep->flags;
>> + __entry->dir = priv_ep->dir;
>> + __entry->enqueue = priv_ep->enqueue;
>> + __entry->dequeue = priv_ep->dequeue;
>> + ),
>> + TP_printk("%s: mps: %d/%d. streams: %d, burst: %d, enq idx: %d, "
>> + "deq idx: %d, flags %s%s%s%s%s%s%s%s, dir: %s",
>> + __get_str(name), __entry->maxpacket,
>> + __entry->maxpacket_limit, __entry->max_streams,
>> + __entry->maxburst, __entry->enqueue,
>> + __entry->dequeue,
>> + __entry->flags & EP_ENABLED ? "EN | " : "",
>> + __entry->flags & EP_STALL ? "STALL | " : "",
>> + __entry->flags & EP_WEDGE ? "WEDGE | " : "",
>> + __entry->flags & EP_TRANSFER_STARTED ? "STARTED | " : "",
>> + __entry->flags & EP_UPDATE_EP_TRBADDR ? "UPD TRB | " : "",
>> + __entry->flags & EP_PENDING_REQUEST ? "REQ PEN | " : "",
>> + __entry->flags & EP_RING_FULL ? "RING FULL |" : "",
>> + __entry->flags & EP_CLAIMED ? "CLAIMED " : "",
>> + __entry->dir ? "IN" : "OUT"
>> + )
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_enable,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep),
>> + TP_ARGS(priv_ep)
>> +);
>> +
>> +DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_disable,
>> + TP_PROTO(struct cdns3_endpoint *priv_ep),
>> + TP_ARGS(priv_ep)
>> +);
>> +
>> +DECLARE_EVENT_CLASS(cdns3_log_request_handled,
>> + TP_PROTO(struct cdns3_request *priv_req, int current_index,
>> + int handled),
>> + TP_ARGS(priv_req, current_index, handled),
>> + TP_STRUCT__entry(
>> + __field(struct cdns3_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->priv_ep->dequeue;
>> + __entry->enqueue_idx = priv_req->priv_ep->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(cdns3_log_request_handled, cdns3_request_handled,
>> + TP_PROTO(struct cdns3_request *priv_req, int current_index,
>> + int handled),
>> + TP_ARGS(priv_req, current_index, handled)
>> +);
>> +#endif /* __LINUX_CDNS3_TRACE */
>> +
>> +/* this part must be outside header guard */
>> +
>> +#undef TRACE_INCLUDE_PATH
>> +#define TRACE_INCLUDE_PATH .
>> +
>> +#undef TRACE_INCLUDE_FILE
>> +#define TRACE_INCLUDE_FILE trace
>> +
>> +#include <trace/define_trace.h>
>> --
>> 2.17.1

\
 
 \ /
  Last update: 2019-03-07 10:56    [W:0.318 / U:15.776 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site