path: root/drivers/net/wireless/ath/ath9k/debug.c

/*
 * Copyright (c) 2008-2009 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <asm/unaligned.h>

#include "ath9k.h"

#define REG_WRITE_D(_ah, _reg, _val) \
	ath9k_hw_common(_ah)->ops->write((_ah), (_val), (_reg))
#define REG_READ_D(_ah, _reg) \
	ath9k_hw_common(_ah)->ops->read((_ah), (_reg))

static int ath9k_debugfs_open(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

static ssize_t ath9k_debugfs_read_buf(struct file *file, char __user *user_buf,
				      size_t count, loff_t *ppos)
{
	u8 *buf = file->private_data;
	return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
}

static int ath9k_debugfs_release_buf(struct inode *inode, struct file *file)
{
	vfree(file->private_data);
	return 0;
}

#ifdef CONFIG_ATH_DEBUG

static ssize_t read_file_debug(struct file *file, char __user *user_buf,
			     size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	char buf[32];
	unsigned int len;

	len = sprintf(buf, "0x%08x\n", common->debug_mask);
	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
			     size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	unsigned long mask;
	char buf[32];
	ssize_t len;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
		return -EFAULT;

	buf[len] = '\0';
	if (strict_strtoul(buf, 0, &mask))
		return -EINVAL;

	common->debug_mask = mask;
	return count;
}

static const struct file_operations fops_debug = {
	.read = read_file_debug,
	.write = write_file_debug,
	.open = ath9k_debugfs_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

#endif

#define DMA_BUF_LEN 1024

static ssize_t read_file_tx_chainmask(struct file *file, char __user *user_buf,
			     size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	char buf[32];
	unsigned int len;

	len = sprintf(buf, "0x%08x\n"