mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-29 22:46:47 +07:00
729dcffd1e
Gadget applications may have a requirement to disable the U1 and U2 entry based on the usecase. Below are few usecases where the disabling U1/U2 entries may be possible. Usecase 1: When combining dwc3 with an redriver for a USB Type-C device solution, it sometimes have problems with leaving U1/U2 for certain hosts, resulting in link training errors and reconnects. For this U1/U2 state entries may be avoided. Usecase 2: When performing performance benchmarking on mass storage gadget the U1 and U2 entries can be disabled. Usecase 3: When periodic transfers like ISOC transfers are used with bInterval of 1 which doesn't require the link to enter into U1 or U2 state entry (since ping is issued from host for every uframe interval). In this case the U1 and U2 entry can be disabled. Disablement of U1/U2 can be done by setting U1DevExitLat and U2DevExitLat values to 0 in the BOS descriptor. Host on seeing 0 value for U1DevExitLat and U2DevExitLat, it doesn't send SET_SEL requests to the gadget. There may be some hosts which may send SET_SEL requests even after seeing 0 in the UxDevExitLat of BOS descriptor. To aviod U1/U2 entries for these type of hosts, dwc3 controller can be programmed to reject those U1/U2 requests by not enabling ACCEPTUxENA bits in DCTL register. This patch updates the same. Signed-off-by: Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com> Signed-off-by: Claus H. Stovgaard <cst@phaseone.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
131 lines
4.2 KiB
C
131 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* gadget.h - DesignWare USB3 DRD Gadget Header
|
|
*
|
|
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
|
|
*
|
|
* Authors: Felipe Balbi <balbi@ti.com>,
|
|
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
*/
|
|
|
|
#ifndef __DRIVERS_USB_DWC3_GADGET_H
|
|
#define __DRIVERS_USB_DWC3_GADGET_H
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/usb/gadget.h>
|
|
#include "io.h"
|
|
|
|
struct dwc3;
|
|
#define to_dwc3_ep(ep) (container_of(ep, struct dwc3_ep, endpoint))
|
|
#define gadget_to_dwc(g) (container_of(g, struct dwc3, gadget))
|
|
|
|
/* DEPCFG parameter 1 */
|
|
#define DWC3_DEPCFG_INT_NUM(n) (((n) & 0x1f) << 0)
|
|
#define DWC3_DEPCFG_XFER_COMPLETE_EN BIT(8)
|
|
#define DWC3_DEPCFG_XFER_IN_PROGRESS_EN BIT(9)
|
|
#define DWC3_DEPCFG_XFER_NOT_READY_EN BIT(10)
|
|
#define DWC3_DEPCFG_FIFO_ERROR_EN BIT(11)
|
|
#define DWC3_DEPCFG_STREAM_EVENT_EN BIT(13)
|
|
#define DWC3_DEPCFG_BINTERVAL_M1(n) (((n) & 0xff) << 16)
|
|
#define DWC3_DEPCFG_STREAM_CAPABLE BIT(24)
|
|
#define DWC3_DEPCFG_EP_NUMBER(n) (((n) & 0x1f) << 25)
|
|
#define DWC3_DEPCFG_BULK_BASED BIT(30)
|
|
#define DWC3_DEPCFG_FIFO_BASED BIT(31)
|
|
|
|
/* DEPCFG parameter 0 */
|
|
#define DWC3_DEPCFG_EP_TYPE(n) (((n) & 0x3) << 1)
|
|
#define DWC3_DEPCFG_MAX_PACKET_SIZE(n) (((n) & 0x7ff) << 3)
|
|
#define DWC3_DEPCFG_FIFO_NUMBER(n) (((n) & 0x1f) << 17)
|
|
#define DWC3_DEPCFG_BURST_SIZE(n) (((n) & 0xf) << 22)
|
|
#define DWC3_DEPCFG_DATA_SEQ_NUM(n) ((n) << 26)
|
|
/* This applies for core versions earlier than 1.94a */
|
|
#define DWC3_DEPCFG_IGN_SEQ_NUM BIT(31)
|
|
/* These apply for core versions 1.94a and later */
|
|
#define DWC3_DEPCFG_ACTION_INIT (0 << 30)
|
|
#define DWC3_DEPCFG_ACTION_RESTORE BIT(30)
|
|
#define DWC3_DEPCFG_ACTION_MODIFY (2 << 30)
|
|
|
|
/* DEPXFERCFG parameter 0 */
|
|
#define DWC3_DEPXFERCFG_NUM_XFER_RES(n) ((n) & 0xffff)
|
|
|
|
/* U1 Device exit Latency */
|
|
#define DWC3_DEFAULT_U1_DEV_EXIT_LAT 0x0A /* Less then 10 microsec */
|
|
|
|
/* U2 Device exit Latency */
|
|
#define DWC3_DEFAULT_U2_DEV_EXIT_LAT 0x1FF /* Less then 511 microsec */
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
#define to_dwc3_request(r) (container_of(r, struct dwc3_request, request))
|
|
|
|
/**
|
|
* next_request - gets the next request on the given list
|
|
* @list: the request list to operate on
|
|
*
|
|
* Caller should take care of locking. This function return %NULL or the first
|
|
* request available on @list.
|
|
*/
|
|
static inline struct dwc3_request *next_request(struct list_head *list)
|
|
{
|
|
return list_first_entry_or_null(list, struct dwc3_request, list);
|
|
}
|
|
|
|
/**
|
|
* dwc3_gadget_move_started_request - move @req to the started_list
|
|
* @req: the request to be moved
|
|
*
|
|
* Caller should take care of locking. This function will move @req from its
|
|
* current list to the endpoint's started_list.
|
|
*/
|
|
static inline void dwc3_gadget_move_started_request(struct dwc3_request *req)
|
|
{
|
|
struct dwc3_ep *dep = req->dep;
|
|
|
|
req->status = DWC3_REQUEST_STATUS_STARTED;
|
|
list_move_tail(&req->list, &dep->started_list);
|
|
}
|
|
|
|
/**
|
|
* dwc3_gadget_move_cancelled_request - move @req to the cancelled_list
|
|
* @req: the request to be moved
|
|
*
|
|
* Caller should take care of locking. This function will move @req from its
|
|
* current list to the endpoint's cancelled_list.
|
|
*/
|
|
static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req)
|
|
{
|
|
struct dwc3_ep *dep = req->dep;
|
|
|
|
req->status = DWC3_REQUEST_STATUS_CANCELLED;
|
|
list_move_tail(&req->list, &dep->cancelled_list);
|
|
}
|
|
|
|
void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
|
|
int status);
|
|
|
|
void dwc3_ep0_interrupt(struct dwc3 *dwc,
|
|
const struct dwc3_event_depevt *event);
|
|
void dwc3_ep0_out_start(struct dwc3 *dwc);
|
|
int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
|
|
int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
|
|
int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
|
|
gfp_t gfp_flags);
|
|
int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol);
|
|
|
|
/**
|
|
* dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
|
|
* @dep: dwc3 endpoint
|
|
*
|
|
* Caller should take care of locking. Returns the transfer resource
|
|
* index for a given endpoint.
|
|
*/
|
|
static inline void dwc3_gadget_ep_get_transfer_index(struct dwc3_ep *dep)
|
|
{
|
|
u32 res_id;
|
|
|
|
res_id = dwc3_readl(dep->regs, DWC3_DEPCMD);
|
|
dep->resource_index = DWC3_DEPCMD_GET_RSC_IDX(res_id);
|
|
}
|
|
|
|
#endif /* __DRIVERS_USB_DWC3_GADGET_H */
|