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5ff90af9da
The DWC3 DebugFS directory and files are currently created once
during probe. This includes creation of subdirectories for each
of the gadget's endpoints. This works fine for peripheral-only
controllers, as dwc3_core_init_mode() calls dwc3_gadget_init()
just prior to calling dwc3_debugfs_init().
However, for dual-role controllers, dwc3_core_init_mode() will
instead call dwc3_drd_init() which is problematic in a few ways.
First, the initial state must be determined, then dwc3_set_mode()
will have to schedule drd_work and by then dwc3_debugfs_init()
could have already been invoked. Even if the initial mode is
peripheral, dwc3_gadget_init() happens after the DebugFS files
are created, and worse so if the initial state is host and the
controller switches to peripheral much later. And secondly,
even if the gadget endpoints' debug entries were successfully
created, if the controller exits peripheral mode, its dwc3_eps
are freed so the debug files would now hold stale references.
So it is best if the DebugFS endpoint entries are created and
removed dynamically at the same time the underlying dwc3_eps are.
Do this by calling dwc3_debugfs_create_endpoint_dir() as each
endpoint is created, and conversely remove the DebugFS entry when
the endpoint is freed.
Fixes: 41ce1456e1 ("usb: dwc3: core: make dwc3_set_mode() work properly")
Reviewed-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Link: https://lore.kernel.org/r/20210529192932.22912-1-jackp@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
428 lines
10 KiB
C
428 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* debug.h - DesignWare USB3 DRD Controller Debug Header
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*
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* Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
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*
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* Authors: Felipe Balbi <balbi@ti.com>,
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* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*/
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#ifndef __DWC3_DEBUG_H
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#define __DWC3_DEBUG_H
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#include "core.h"
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/**
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* dwc3_gadget_ep_cmd_string - returns endpoint command string
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* @cmd: command code
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*/
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static inline const char *
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dwc3_gadget_ep_cmd_string(u8 cmd)
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{
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switch (cmd) {
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case DWC3_DEPCMD_DEPSTARTCFG:
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return "Start New Configuration";
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case DWC3_DEPCMD_ENDTRANSFER:
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return "End Transfer";
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case DWC3_DEPCMD_UPDATETRANSFER:
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return "Update Transfer";
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case DWC3_DEPCMD_STARTTRANSFER:
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return "Start Transfer";
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case DWC3_DEPCMD_CLEARSTALL:
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return "Clear Stall";
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case DWC3_DEPCMD_SETSTALL:
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return "Set Stall";
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case DWC3_DEPCMD_GETEPSTATE:
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return "Get Endpoint State";
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case DWC3_DEPCMD_SETTRANSFRESOURCE:
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return "Set Endpoint Transfer Resource";
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case DWC3_DEPCMD_SETEPCONFIG:
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return "Set Endpoint Configuration";
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default:
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return "UNKNOWN command";
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}
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}
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/**
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* dwc3_gadget_generic_cmd_string - returns generic command string
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* @cmd: command code
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*/
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static inline const char *
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dwc3_gadget_generic_cmd_string(u8 cmd)
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{
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switch (cmd) {
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case DWC3_DGCMD_SET_LMP:
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return "Set LMP";
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case DWC3_DGCMD_SET_PERIODIC_PAR:
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return "Set Periodic Parameters";
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case DWC3_DGCMD_XMIT_FUNCTION:
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return "Transmit Function Wake Device Notification";
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case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO:
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return "Set Scratchpad Buffer Array Address Lo";
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case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI:
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return "Set Scratchpad Buffer Array Address Hi";
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case DWC3_DGCMD_SELECTED_FIFO_FLUSH:
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return "Selected FIFO Flush";
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case DWC3_DGCMD_ALL_FIFO_FLUSH:
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return "All FIFO Flush";
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case DWC3_DGCMD_SET_ENDPOINT_NRDY:
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return "Set Endpoint NRDY";
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case DWC3_DGCMD_SET_ENDPOINT_PRIME:
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return "Set Endpoint Prime";
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case DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK:
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return "Run SoC Bus Loopback Test";
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default:
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return "UNKNOWN";
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}
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}
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/**
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* dwc3_gadget_link_string - returns link name
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* @link_state: link state code
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*/
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static inline const char *
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dwc3_gadget_link_string(enum dwc3_link_state link_state)
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{
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switch (link_state) {
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case DWC3_LINK_STATE_U0:
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return "U0";
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case DWC3_LINK_STATE_U1:
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return "U1";
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case DWC3_LINK_STATE_U2:
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return "U2";
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case DWC3_LINK_STATE_U3:
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return "U3";
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case DWC3_LINK_STATE_SS_DIS:
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return "SS.Disabled";
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case DWC3_LINK_STATE_RX_DET:
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return "RX.Detect";
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case DWC3_LINK_STATE_SS_INACT:
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return "SS.Inactive";
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case DWC3_LINK_STATE_POLL:
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return "Polling";
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case DWC3_LINK_STATE_RECOV:
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return "Recovery";
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case DWC3_LINK_STATE_HRESET:
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return "Hot Reset";
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case DWC3_LINK_STATE_CMPLY:
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return "Compliance";
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case DWC3_LINK_STATE_LPBK:
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return "Loopback";
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case DWC3_LINK_STATE_RESET:
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return "Reset";
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case DWC3_LINK_STATE_RESUME:
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return "Resume";
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default:
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return "UNKNOWN link state";
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}
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}
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/**
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* dwc3_gadget_hs_link_string - returns highspeed and below link name
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* @link_state: link state code
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*/
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static inline const char *
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dwc3_gadget_hs_link_string(enum dwc3_link_state link_state)
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{
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switch (link_state) {
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case DWC3_LINK_STATE_U0:
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return "On";
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case DWC3_LINK_STATE_U2:
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return "Sleep";
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case DWC3_LINK_STATE_U3:
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return "Suspend";
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case DWC3_LINK_STATE_SS_DIS:
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return "Disconnected";
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case DWC3_LINK_STATE_RX_DET:
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return "Early Suspend";
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case DWC3_LINK_STATE_RECOV:
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return "Recovery";
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case DWC3_LINK_STATE_RESET:
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return "Reset";
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case DWC3_LINK_STATE_RESUME:
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return "Resume";
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default:
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return "UNKNOWN link state";
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}
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}
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/**
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* dwc3_trb_type_string - returns TRB type as a string
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* @type: the type of the TRB
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*/
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static inline const char *dwc3_trb_type_string(unsigned int type)
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{
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switch (type) {
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case DWC3_TRBCTL_NORMAL:
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return "normal";
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case DWC3_TRBCTL_CONTROL_SETUP:
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return "setup";
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case DWC3_TRBCTL_CONTROL_STATUS2:
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return "status2";
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case DWC3_TRBCTL_CONTROL_STATUS3:
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return "status3";
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case DWC3_TRBCTL_CONTROL_DATA:
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return "data";
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case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
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return "isoc-first";
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case DWC3_TRBCTL_ISOCHRONOUS:
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return "isoc";
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case DWC3_TRBCTL_LINK_TRB:
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return "link";
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default:
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return "UNKNOWN";
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}
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}
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static inline const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
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{
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switch (state) {
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case EP0_UNCONNECTED:
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return "Unconnected";
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case EP0_SETUP_PHASE:
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return "Setup Phase";
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case EP0_DATA_PHASE:
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return "Data Phase";
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case EP0_STATUS_PHASE:
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return "Status Phase";
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default:
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return "UNKNOWN";
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}
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}
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/**
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* dwc3_gadget_event_string - returns event name
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* @event: the event code
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*/
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static inline const char *dwc3_gadget_event_string(char *str, size_t size,
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const struct dwc3_event_devt *event)
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{
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enum dwc3_link_state state = event->event_info & DWC3_LINK_STATE_MASK;
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switch (event->type) {
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case DWC3_DEVICE_EVENT_DISCONNECT:
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snprintf(str, size, "Disconnect: [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_RESET:
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snprintf(str, size, "Reset [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_CONNECT_DONE:
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snprintf(str, size, "Connection Done [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
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snprintf(str, size, "Link Change [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_WAKEUP:
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snprintf(str, size, "WakeUp [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_SUSPEND:
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snprintf(str, size, "Suspend [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_SOF:
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snprintf(str, size, "Start-Of-Frame [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
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snprintf(str, size, "Erratic Error [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_CMD_CMPL:
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snprintf(str, size, "Command Complete [%s]",
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dwc3_gadget_link_string(state));
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break;
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case DWC3_DEVICE_EVENT_OVERFLOW:
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snprintf(str, size, "Overflow [%s]",
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dwc3_gadget_link_string(state));
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break;
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default:
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snprintf(str, size, "UNKNOWN");
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}
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return str;
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}
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/**
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* dwc3_ep_event_string - returns event name
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* @event: then event code
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*/
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static inline const char *dwc3_ep_event_string(char *str, size_t size,
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const struct dwc3_event_depevt *event, u32 ep0state)
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{
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u8 epnum = event->endpoint_number;
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size_t len;
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int status;
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len = scnprintf(str, size, "ep%d%s: ", epnum >> 1,
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(epnum & 1) ? "in" : "out");
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status = event->status;
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switch (event->endpoint_event) {
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case DWC3_DEPEVT_XFERCOMPLETE:
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len += scnprintf(str + len, size - len,
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"Transfer Complete (%c%c%c)",
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status & DEPEVT_STATUS_SHORT ? 'S' : 's',
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status & DEPEVT_STATUS_IOC ? 'I' : 'i',
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status & DEPEVT_STATUS_LST ? 'L' : 'l');
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if (epnum <= 1)
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scnprintf(str + len, size - len, " [%s]",
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dwc3_ep0_state_string(ep0state));
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break;
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case DWC3_DEPEVT_XFERINPROGRESS:
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scnprintf(str + len, size - len,
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"Transfer In Progress [%d] (%c%c%c)",
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event->parameters,
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status & DEPEVT_STATUS_SHORT ? 'S' : 's',
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status & DEPEVT_STATUS_IOC ? 'I' : 'i',
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status & DEPEVT_STATUS_LST ? 'M' : 'm');
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break;
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case DWC3_DEPEVT_XFERNOTREADY:
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len += scnprintf(str + len, size - len,
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"Transfer Not Ready [%d]%s",
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event->parameters,
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status & DEPEVT_STATUS_TRANSFER_ACTIVE ?
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" (Active)" : " (Not Active)");
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/* Control Endpoints */
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if (epnum <= 1) {
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int phase = DEPEVT_STATUS_CONTROL_PHASE(event->status);
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switch (phase) {
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case DEPEVT_STATUS_CONTROL_DATA:
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scnprintf(str + len, size - len,
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" [Data Phase]");
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break;
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case DEPEVT_STATUS_CONTROL_STATUS:
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scnprintf(str + len, size - len,
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" [Status Phase]");
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}
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}
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break;
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case DWC3_DEPEVT_RXTXFIFOEVT:
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scnprintf(str + len, size - len, "FIFO");
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break;
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case DWC3_DEPEVT_STREAMEVT:
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status = event->status;
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switch (status) {
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case DEPEVT_STREAMEVT_FOUND:
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scnprintf(str + len, size - len, " Stream %d Found",
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event->parameters);
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break;
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case DEPEVT_STREAMEVT_NOTFOUND:
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default:
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scnprintf(str + len, size - len, " Stream Not Found");
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break;
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}
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break;
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case DWC3_DEPEVT_EPCMDCMPLT:
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scnprintf(str + len, size - len, "Endpoint Command Complete");
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break;
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default:
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scnprintf(str + len, size - len, "UNKNOWN");
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}
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return str;
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}
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/**
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* dwc3_gadget_event_type_string - return event name
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* @event: the event code
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*/
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static inline const char *dwc3_gadget_event_type_string(u8 event)
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{
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switch (event) {
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case DWC3_DEVICE_EVENT_DISCONNECT:
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return "Disconnect";
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case DWC3_DEVICE_EVENT_RESET:
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return "Reset";
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case DWC3_DEVICE_EVENT_CONNECT_DONE:
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return "Connect Done";
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case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
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return "Link Status Change";
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case DWC3_DEVICE_EVENT_WAKEUP:
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return "Wake-Up";
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case DWC3_DEVICE_EVENT_HIBER_REQ:
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return "Hibernation";
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case DWC3_DEVICE_EVENT_SUSPEND:
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return "Suspend";
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case DWC3_DEVICE_EVENT_SOF:
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return "Start of Frame";
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case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
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return "Erratic Error";
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case DWC3_DEVICE_EVENT_CMD_CMPL:
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return "Command Complete";
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case DWC3_DEVICE_EVENT_OVERFLOW:
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return "Overflow";
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default:
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return "UNKNOWN";
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}
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}
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static inline const char *dwc3_decode_event(char *str, size_t size, u32 event,
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u32 ep0state)
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{
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union dwc3_event evt;
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memcpy(&evt, &event, sizeof(event));
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if (evt.type.is_devspec)
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return dwc3_gadget_event_string(str, size, &evt.devt);
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else
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return dwc3_ep_event_string(str, size, &evt.depevt, ep0state);
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}
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static inline const char *dwc3_ep_cmd_status_string(int status)
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{
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switch (status) {
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case -ETIMEDOUT:
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return "Timed Out";
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case 0:
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return "Successful";
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case DEPEVT_TRANSFER_NO_RESOURCE:
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return "No Resource";
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case DEPEVT_TRANSFER_BUS_EXPIRY:
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return "Bus Expiry";
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default:
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return "UNKNOWN";
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}
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}
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static inline const char *dwc3_gadget_generic_cmd_status_string(int status)
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{
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switch (status) {
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case -ETIMEDOUT:
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return "Timed Out";
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case 0:
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return "Successful";
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case 1:
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return "Error";
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default:
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return "UNKNOWN";
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}
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}
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#ifdef CONFIG_DEBUG_FS
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extern void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep);
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extern void dwc3_debugfs_init(struct dwc3 *d);
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extern void dwc3_debugfs_exit(struct dwc3 *d);
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#else
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static inline void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep)
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{ }
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static inline void dwc3_debugfs_init(struct dwc3 *d)
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{ }
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static inline void dwc3_debugfs_exit(struct dwc3 *d)
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{ }
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#endif
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#endif /* __DWC3_DEBUG_H */
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