// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
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* All rights reserved.
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*/
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#if defined(WILC_DEBUGFS)
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#include <linux/module.h>
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#include <linux/debugfs.h>
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#include "wilc_wlan_if.h"
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static struct dentry *wilc_dir;
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#define DEBUG BIT(0)
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#define INFO BIT(1)
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#define WRN BIT(2)
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#define ERR BIT(3)
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#define DBG_LEVEL_ALL (DEBUG | INFO | WRN | ERR)
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static atomic_t WILC_DEBUG_LEVEL = ATOMIC_INIT(ERR);
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EXPORT_SYMBOL_GPL(WILC_DEBUG_LEVEL);
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static ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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char buf[128];
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int res = 0;
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/* only allow read from start */
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if (*ppos > 0)
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return 0;
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res = scnprintf(buf, sizeof(buf), "Debug Level: %x\n",
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atomic_read(&WILC_DEBUG_LEVEL));
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return simple_read_from_buffer(userbuf, count, ppos, buf, res);
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}
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static ssize_t wilc_debug_level_write(struct file *filp,
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const char __user *buf, size_t count,
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loff_t *ppos)
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{
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int flag = 0;
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int ret;
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ret = kstrtouint_from_user(buf, count, 16, &flag);
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if (ret)
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return ret;
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if (flag > DBG_LEVEL_ALL) {
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pr_info("%s, value (0x%08x) is out of range, stay previous flag (0x%08x)\n",
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__func__, flag, atomic_read(&WILC_DEBUG_LEVEL));
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return -EINVAL;
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}
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atomic_set(&WILC_DEBUG_LEVEL, (int)flag);
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if (flag == 0)
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pr_info("Debug-level disabled\n");
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else
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pr_info("Debug-level enabled\n");
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return count;
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}
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#define FOPS(_open, _read, _write, _poll) { \
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.owner = THIS_MODULE, \
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.open = (_open), \
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.read = (_read), \
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.write = (_write), \
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.poll = (_poll), \
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}
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struct wilc_debugfs_info_t {
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const char *name;
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int perm;
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unsigned int data;
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const struct file_operations fops;
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};
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static struct wilc_debugfs_info_t debugfs_info[] = {
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{
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"wilc_debug_level",
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0666,
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(DEBUG | ERR),
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FOPS(NULL, wilc_debug_level_read, wilc_debug_level_write, NULL),
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},
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};
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static int __init wilc_debugfs_init(void)
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{
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int i;
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struct wilc_debugfs_info_t *info;
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wilc_dir = debugfs_create_dir("wilc_wifi", NULL);
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for (i = 0; i < ARRAY_SIZE(debugfs_info); i++) {
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info = &debugfs_info[i];
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debugfs_create_file(info->name,
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info->perm,
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wilc_dir,
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&info->data,
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&info->fops);
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}
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return 0;
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}
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module_init(wilc_debugfs_init);
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static void __exit wilc_debugfs_remove(void)
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{
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debugfs_remove_recursive(wilc_dir);
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}
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module_exit(wilc_debugfs_remove);
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#endif
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