332 lines
8.7 KiB
C
332 lines
8.7 KiB
C
/*
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Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00lib
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Abstract: rt2x00 debugfs specific routines.
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*/
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/*
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* Set enviroment defines for rt2x00.h
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*/
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#define DRV_NAME "rt2x00lib"
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#include <linux/debugfs.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/uaccess.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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#define PRINT_LINE_LEN_MAX 32
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struct rt2x00debug_intf {
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/*
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* Pointer to driver structure where
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* this debugfs entry belongs to.
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*/
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struct rt2x00_dev *rt2x00dev;
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/*
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* Reference to the rt2x00debug structure
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* which can be used to communicate with
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* the registers.
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*/
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const struct rt2x00debug *debug;
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/*
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* Debugfs entries for:
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* - driver folder
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* - driver file
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* - chipset file
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* - register offset/value files
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* - eeprom offset/value files
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* - bbp offset/value files
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* - rf offset/value files
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*/
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struct dentry *driver_folder;
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struct dentry *driver_entry;
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struct dentry *chipset_entry;
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struct dentry *csr_off_entry;
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struct dentry *csr_val_entry;
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struct dentry *eeprom_off_entry;
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struct dentry *eeprom_val_entry;
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struct dentry *bbp_off_entry;
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struct dentry *bbp_val_entry;
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struct dentry *rf_off_entry;
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struct dentry *rf_val_entry;
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/*
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* Driver and chipset files will use a data buffer
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* that has been created in advance. This will simplify
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* the code since we can use the debugfs functions.
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*/
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struct debugfs_blob_wrapper driver_blob;
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struct debugfs_blob_wrapper chipset_blob;
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/*
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* Requested offset for each register type.
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*/
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unsigned int offset_csr;
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unsigned int offset_eeprom;
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unsigned int offset_bbp;
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unsigned int offset_rf;
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};
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static int rt2x00debug_file_open(struct inode *inode, struct file *file)
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{
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struct rt2x00debug_intf *intf = inode->i_private;
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file->private_data = inode->i_private;
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if (!try_module_get(intf->debug->owner))
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return -EBUSY;
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return 0;
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}
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static int rt2x00debug_file_release(struct inode *inode, struct file *file)
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{
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struct rt2x00debug_intf *intf = file->private_data;
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module_put(intf->debug->owner);
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return 0;
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}
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#define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \
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static ssize_t rt2x00debug_read_##__name(struct file *file, \
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char __user *buf, \
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size_t length, \
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loff_t *offset) \
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{ \
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struct rt2x00debug_intf *intf = file->private_data; \
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const struct rt2x00debug *debug = intf->debug; \
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char line[16]; \
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size_t size; \
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__type value; \
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\
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if (*offset) \
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return 0; \
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\
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if (intf->offset_##__name >= debug->__name.word_count) \
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return -EINVAL; \
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\
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debug->__name.read(intf->rt2x00dev, \
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intf->offset_##__name, &value); \
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\
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size = sprintf(line, __format, value); \
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\
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if (copy_to_user(buf, line, size)) \
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return -EFAULT; \
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\
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*offset += size; \
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return size; \
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}
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#define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \
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static ssize_t rt2x00debug_write_##__name(struct file *file, \
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const char __user *buf,\
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size_t length, \
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loff_t *offset) \
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{ \
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struct rt2x00debug_intf *intf = file->private_data; \
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const struct rt2x00debug *debug = intf->debug; \
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char line[16]; \
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size_t size; \
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__type value; \
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\
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if (*offset) \
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return 0; \
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\
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if (!capable(CAP_NET_ADMIN)) \
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return -EPERM; \
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\
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if (intf->offset_##__name >= debug->__name.word_count) \
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return -EINVAL; \
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\
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if (copy_from_user(line, buf, length)) \
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return -EFAULT; \
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\
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size = strlen(line); \
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value = simple_strtoul(line, NULL, 0); \
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\
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debug->__name.write(intf->rt2x00dev, \
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intf->offset_##__name, value); \
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\
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*offset += size; \
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return size; \
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}
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#define RT2X00DEBUGFS_OPS(__name, __format, __type) \
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RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
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RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
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\
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static const struct file_operations rt2x00debug_fop_##__name = {\
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.owner = THIS_MODULE, \
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.read = rt2x00debug_read_##__name, \
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.write = rt2x00debug_write_##__name, \
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.open = rt2x00debug_file_open, \
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.release = rt2x00debug_file_release, \
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};
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RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
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RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
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RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
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RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
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static struct dentry *rt2x00debug_create_file_driver(const char *name,
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struct rt2x00debug_intf
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*intf,
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struct debugfs_blob_wrapper
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*blob)
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{
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char *data;
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data = kzalloc(3 * PRINT_LINE_LEN_MAX, GFP_KERNEL);
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if (!data)
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return NULL;
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blob->data = data;
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data += sprintf(data, "driver: %s\n", intf->rt2x00dev->ops->name);
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data += sprintf(data, "version: %s\n", DRV_VERSION);
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data += sprintf(data, "compiled: %s %s\n", __DATE__, __TIME__);
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blob->size = strlen(blob->data);
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return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
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}
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static struct dentry *rt2x00debug_create_file_chipset(const char *name,
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struct rt2x00debug_intf
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*intf,
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struct
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debugfs_blob_wrapper
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*blob)
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{
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const struct rt2x00debug *debug = intf->debug;
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char *data;
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data = kzalloc(4 * PRINT_LINE_LEN_MAX, GFP_KERNEL);
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if (!data)
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return NULL;
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blob->data = data;
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data += sprintf(data, "csr length: %d\n", debug->csr.word_count);
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data += sprintf(data, "eeprom length: %d\n", debug->eeprom.word_count);
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data += sprintf(data, "bbp length: %d\n", debug->bbp.word_count);
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data += sprintf(data, "rf length: %d\n", debug->rf.word_count);
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blob->size = strlen(blob->data);
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return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
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}
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void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
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{
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const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
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struct rt2x00debug_intf *intf;
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intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
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if (!intf) {
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ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
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return;
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}
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intf->debug = debug;
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intf->rt2x00dev = rt2x00dev;
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rt2x00dev->debugfs_intf = intf;
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intf->driver_folder =
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debugfs_create_dir(intf->rt2x00dev->ops->name,
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rt2x00dev->hw->wiphy->debugfsdir);
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if (IS_ERR(intf->driver_folder))
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goto exit;
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intf->driver_entry =
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rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
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if (IS_ERR(intf->driver_entry))
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goto exit;
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intf->chipset_entry =
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rt2x00debug_create_file_chipset("chipset",
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intf, &intf->chipset_blob);
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if (IS_ERR(intf->chipset_entry))
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goto exit;
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#define RT2X00DEBUGFS_CREATE_ENTRY(__intf, __name) \
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({ \
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(__intf)->__name##_off_entry = \
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debugfs_create_u32(__stringify(__name) "_offset", \
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S_IRUGO | S_IWUSR, \
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(__intf)->driver_folder, \
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&(__intf)->offset_##__name); \
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if (IS_ERR((__intf)->__name##_off_entry)) \
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goto exit; \
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\
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(__intf)->__name##_val_entry = \
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debugfs_create_file(__stringify(__name) "_value", \
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S_IRUGO | S_IWUSR, \
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(__intf)->driver_folder, \
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(__intf), &rt2x00debug_fop_##__name);\
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if (IS_ERR((__intf)->__name##_val_entry)) \
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goto exit; \
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})
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RT2X00DEBUGFS_CREATE_ENTRY(intf, csr);
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RT2X00DEBUGFS_CREATE_ENTRY(intf, eeprom);
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RT2X00DEBUGFS_CREATE_ENTRY(intf, bbp);
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RT2X00DEBUGFS_CREATE_ENTRY(intf, rf);
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#undef RT2X00DEBUGFS_CREATE_ENTRY
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return;
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exit:
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rt2x00debug_deregister(rt2x00dev);
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ERROR(rt2x00dev, "Failed to register debug handler.\n");
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return;
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}
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void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
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{
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const struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
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if (unlikely(!intf))
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return;
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debugfs_remove(intf->rf_val_entry);
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debugfs_remove(intf->rf_off_entry);
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debugfs_remove(intf->bbp_val_entry);
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debugfs_remove(intf->bbp_off_entry);
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debugfs_remove(intf->eeprom_val_entry);
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debugfs_remove(intf->eeprom_off_entry);
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debugfs_remove(intf->csr_val_entry);
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debugfs_remove(intf->csr_off_entry);
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debugfs_remove(intf->chipset_entry);
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debugfs_remove(intf->driver_entry);
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debugfs_remove(intf->driver_folder);
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kfree(intf->chipset_blob.data);
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kfree(intf->driver_blob.data);
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kfree(intf);
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rt2x00dev->debugfs_intf = NULL;
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}
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