linux/drivers/usb/dwc2/debugfs.c

// SPDX-License-Identifier: GPL-2.0
/*
 * debugfs.c - Designware USB2 DRD controller debugfs
 *
 * Copyright (C) 2015 Intel Corporation
 * Mian Yousaf Kaukab <[email protected]>
 */

#include <linux/spinlock.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>

#include "core.h"
#include "debug.h"

#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)

/**
 * testmode_write() - change usb test mode state.
 * @file: The  file to write to.
 * @ubuf: The buffer where user wrote.
 * @count: The ubuf size.
 * @ppos: Unused parameter.
 */
static ssize_t testmode_write(struct file *file, const char __user *ubuf, size_t
		count, loff_t *ppos)
{ … }

/**
 * testmode_show() - debugfs: show usb test mode state
 * @s: The seq file to write to.
 * @unused: Unused parameter.
 *
 * This debugfs entry shows which usb test mode is currently enabled.
 */
static int testmode_show(struct seq_file *s, void *unused)
{ … }

static int testmode_open(struct inode *inode, struct file *file)
{ … }

static const struct file_operations testmode_fops = …;

/**
 * state_show - debugfs: show overall driver and device state.
 * @seq: The seq file to write to.
 * @v: Unused parameter.
 *
 * This debugfs entry shows the overall state of the hardware and
 * some general information about each of the endpoints available
 * to the system.
 */
static int state_show(struct seq_file *seq, void *v)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

/**
 * fifo_show - debugfs: show the fifo information
 * @seq: The seq_file to write data to.
 * @v: Unused parameter.
 *
 * Show the FIFO information for the overall fifo and all the
 * periodic transmission FIFOs.
 */
static int fifo_show(struct seq_file *seq, void *v)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

static const char *decode_direction(int is_in)
{ … }

/**
 * ep_show - debugfs: show the state of an endpoint.
 * @seq: The seq_file to write data to.
 * @v: Unused parameter.
 *
 * This debugfs entry shows the state of the given endpoint (one is
 * registered for each available).
 */
static int ep_show(struct seq_file *seq, void *v)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

/**
 * dwc2_hsotg_create_debug - create debugfs directory and files
 * @hsotg: The driver state
 *
 * Create the debugfs files to allow the user to get information
 * about the state of the system. The directory name is created
 * with the same name as the device itself, in case we end up
 * with multiple blocks in future systems.
 */
static void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg)
{ … }
#else
static inline void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg) {}
#endif

/* dwc2_hsotg_delete_debug is removed as cleanup in done in dwc2_debugfs_exit */

#define dump_register(nm) …

static const struct debugfs_reg32 dwc2_regs[] = …;

#define print_param(_seq, _ptr, _param) …

#define print_param_hex(_seq, _ptr, _param) …

static int params_show(struct seq_file *seq, void *v)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

static int hw_params_show(struct seq_file *seq, void *v)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

static int dr_mode_show(struct seq_file *seq, void *v)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
{ … }

void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg)
{ … }