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