diff options
Diffstat (limited to 'drivers/staging/wilc1000/wilc_debugfs.c')
| -rw-r--r-- | drivers/staging/wilc1000/wilc_debugfs.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/drivers/staging/wilc1000/wilc_debugfs.c b/drivers/staging/wilc1000/wilc_debugfs.c new file mode 100644 index 000000000..c328208cd --- /dev/null +++ b/drivers/staging/wilc1000/wilc_debugfs.c @@ -0,0 +1,191 @@ +/* + * NewportMedia WiFi chipset driver test tools - wilc-debug + * Copyright (c) 2012 NewportMedia Inc. + * Author: SSW <sswd@wilcsemic.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#if defined(WILC_DEBUGFS) +#include <linux/module.h> +#include <linux/debugfs.h> +#include <linux/poll.h> +#include <linux/sched.h> + +#include "wilc_wlan_if.h" + + +static struct dentry *wilc_dir; + +/* + * -------------------------------------------------------------------------------- + */ + +#define DBG_REGION_ALL (GENERIC_DBG | HOSTAPD_DBG | HOSTINF_DBG | CORECONFIG_DBG | CFG80211_DBG | INT_DBG | TX_DBG | RX_DBG | LOCK_DBG | INIT_DBG | BUS_DBG | MEM_DBG) +#define DBG_LEVEL_ALL (DEBUG | INFO | WRN | ERR) +atomic_t REGION = ATOMIC_INIT(INIT_DBG | GENERIC_DBG | CFG80211_DBG | FIRM_DBG | HOSTAPD_DBG); +atomic_t DEBUG_LEVEL = ATOMIC_INIT(ERR); + +/* + * -------------------------------------------------------------------------------- + */ + + +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(&DEBUG_LEVEL)); + + return simple_read_from_buffer(userbuf, count, ppos, buf, res); +} + +static ssize_t wilc_debug_level_write(struct file *filp, const char *buf, size_t count, loff_t *ppos) +{ + char buffer[128] = {}; + int flag = 0; + + if (count > sizeof(buffer)) + return -EINVAL; + + if (copy_from_user(buffer, buf, count)) { + return -EFAULT; + } + + flag = buffer[0] - '0'; + + if (flag > 0) { + flag = DEBUG | ERR; + } else if (flag < 0) { + flag = 100; + } + + if (flag > DBG_LEVEL_ALL) { + printk("%s, value (0x%08x) is out of range, stay previous flag (0x%08x)\n", __func__, flag, atomic_read(&DEBUG_LEVEL)); + return -EFAULT; + } + + atomic_set(&DEBUG_LEVEL, (int)flag); + + if (flag == 0) { + printk("Debug-level disabled\n"); + } else { + printk("Debug-level enabled\n"); + } + return count; +} + +static ssize_t wilc_debug_region_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 region: %x\n", atomic_read(®ION)); + + return simple_read_from_buffer(userbuf, count, ppos, buf, res); +} + +static ssize_t wilc_debug_region_write(struct file *filp, const char *buf, size_t count, loff_t *ppos) +{ + char buffer[128] = {}; + int flag; + + if (count > sizeof(buffer)) + return -EINVAL; + + if (copy_from_user(buffer, buf, count)) { + return -EFAULT; + } + + flag = buffer[0] - '0'; + + if (flag > DBG_REGION_ALL) { + printk("%s, value (0x%08x) is out of range, stay previous flag (0x%08x)\n", __func__, flag, atomic_read(®ION)); + return -EFAULT; + } + + atomic_set(®ION, (int)flag); + printk("new debug-region is %x\n", atomic_read(®ION)); + + 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; + 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), }, + { "wilc_debug_region", 0666, (INIT_DBG | GENERIC_DBG | CFG80211_DBG), FOPS(NULL, wilc_debug_region_read, wilc_debug_region_write, NULL), }, +}; + +int wilc_debugfs_init(void) +{ + int i; + + struct dentry *debugfs_files; + struct wilc_debugfs_info_t *info; + + wilc_dir = debugfs_create_dir("wilc_wifi", NULL); + if (wilc_dir == ERR_PTR(-ENODEV)) { + /* it's not error. the debugfs is just not being enabled. */ + printk("ERR, kernel has built without debugfs support\n"); + return 0; + } + + if (!wilc_dir) { + printk("ERR, debugfs create dir\n"); + return -1; + } + + for (i = 0; i < ARRAY_SIZE(debugfs_info); i++) { + info = &debugfs_info[i]; + debugfs_files = debugfs_create_file(info->name, + info->perm, + wilc_dir, + &info->data, + &info->fops); + + if (!debugfs_files) { + printk("ERR fail to create the debugfs file, %s\n", info->name); + debugfs_remove_recursive(wilc_dir); + return -1; + } + } + return 0; +} + +void wilc_debugfs_remove(void) +{ + debugfs_remove_recursive(wilc_dir); +} + +#endif + |