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ath5k: added debugfs file for dumping eeprom

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Signed-off-by: Jade Bilkey <herself@thefumon.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jade Bilkey 2014-08-30 15:14:14 -04:00 committed by John W. Linville
parent 87fed556d0
commit db906eb210
1 changed files with 96 additions and 0 deletions
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96
drivers/net/wireless/ath/ath5k/debug.c
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@ -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);