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Commit db906eb2 authored by Jade Bilkey's avatar Jade Bilkey Committed by John W. Linville
Browse files

ath5k: added debugfs file for dumping eeprom 



Signed-off-by: default avatarJade Bilkey <herself@thefumon.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 87fed556

drivers/net/wireless/ath/ath5k/debug.c

+96 −0
Original line number Diff line number Diff line
@@ -894,6 +894,100 @@ static const struct file_operations fops_queue = { 
	.llseek = default_llseek,

};



/* debugfs: eeprom */



struct eeprom_private {

	u16 *buf;

	int len;

};



static int open_file_eeprom(struct inode *inode, struct file *file)

{

	struct eeprom_private *ep;

	struct ath5k_hw *ah = inode->i_private;

	bool res;

	int i, ret;

	u32 eesize;

	u16 val, *buf;



	/* Get eeprom size */



	res = ath5k_hw_nvram_read(ah, AR5K_EEPROM_SIZE_UPPER, &val);

	if (!res)

		return -EACCES;



	if (val == 0) {

		eesize = AR5K_EEPROM_INFO_MAX + AR5K_EEPROM_INFO_BASE;

	} else {

		eesize = (val & AR5K_EEPROM_SIZE_UPPER_MASK) <<

			AR5K_EEPROM_SIZE_ENDLOC_SHIFT;

		ath5k_hw_nvram_read(ah, AR5K_EEPROM_SIZE_LOWER, &val);

		eesize = eesize | val;

	}



	if (eesize > 4096)

		return -EINVAL;



	/* Create buffer and read in eeprom */



	buf = vmalloc(eesize);

	if (!buf) {

		ret = -ENOMEM;

		goto err;

	}



	for (i = 0; i < eesize; ++i) {

		AR5K_EEPROM_READ(i, val);

		buf[i] = val;

	}



	/* Create private struct and assign to file */



	ep = kmalloc(sizeof(*ep), GFP_KERNEL);

	if (!ep) {

		ret = -ENOMEM;

		goto freebuf;

	}



	ep->buf = buf;

	ep->len = i;



	file->private_data = (void *)ep;



	return 0;



freebuf:

	vfree(buf);

err:

	return ret;



}



static ssize_t read_file_eeprom(struct file *file, char __user *user_buf,

				   size_t count, loff_t *ppos)

{

	struct eeprom_private *ep = file->private_data;



	return simple_read_from_buffer(user_buf, count, ppos, ep->buf, ep->len);

}



static int release_file_eeprom(struct inode *inode, struct file *file)

{

	struct eeprom_private *ep = file->private_data;



	vfree(ep->buf);

	kfree(ep);



	return 0;

}



static const struct file_operations fops_eeprom = {

	.open = open_file_eeprom,

	.read = read_file_eeprom,

	.release = release_file_eeprom,

	.owner = THIS_MODULE,

};





void

ath5k_debug_init_device(struct ath5k_hw *ah)
@@ -921,6 +1015,8 @@ ath5k_debug_init_device(struct ath5k_hw *ah) 


	debugfs_create_file("misc", S_IRUSR, phydir, ah, &fops_misc);



	debugfs_create_file("eeprom", S_IRUSR, phydir, ah, &fops_eeprom);



	debugfs_create_file("frameerrors", S_IWUSR | S_IRUSR, phydir, ah,

			    &fops_frameerrors);