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ath9k: Read and write the TSF via debugfs

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This patch adds an ath9k specific entry to read, write and reset the TSF into the debugfs, like in ath5k. This makes debugging the IBSS handling of wifi drivers _much_ easier.

Signed-off-by: Alina Friedrichsen <x-alina@gmx.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Alina Friedrichsen
2009-01-23 05:44:21 +01:00
committed by John W. Linville
parent 8cab7581db
commit 27abe060aa
4 changed files with 58 additions and 0 deletions
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49
drivers/net/wireless/ath9k/debug.c
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@@ -222,6 +222,49 @@ static const struct file_operations fops_interrupt = {
.owner = THIS_MODULE
};
static ssize_t read_file_tsf(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[100];
snprintf(buf, sizeof(buf), "0x%016llx\n",
(unsigned long long)ath9k_hw_gettsf64(sc->sc_ah));
return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
}
static ssize_t write_file_tsf(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[21];
unsigned long long tsf;
if (copy_from_user(buf, user_buf, min(count, sizeof(buf) - 1)))
return -EFAULT;
buf[sizeof(buf) - 1] = '\0';
if (strncmp(buf, "reset", 5) == 0) {
ath9k_hw_reset_tsf(sc->sc_ah);
printk(KERN_INFO "debugfs reset TSF\n");
} else {
tsf = simple_strtoul(buf, NULL, 0);
ath9k_hw_settsf64(sc->sc_ah, tsf);
printk(KERN_INFO "debugfs set TSF to %#018llx\n", tsf);
}
return count;
}
static const struct file_operations fops_tsf = {
.read = read_file_tsf,
.write = write_file_tsf,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE
};
int ath9k_init_debug(struct ath_softc *sc)
{
sc->sc_debug.debug_mask = ath9k_debug;
@@ -247,6 +290,11 @@ int ath9k_init_debug(struct ath_softc *sc)
if (!sc->sc_debug.debugfs_interrupt)
goto err;
sc->sc_debug.debugfs_tsf = debugfs_create_file("tsf", S_IRUGO,
sc->sc_debug.debugfs_phy, sc, &fops_tsf);
if (!sc->sc_debug.debugfs_tsf)
goto err;
return 0;
err:
ath9k_exit_debug(sc);
@@ -255,6 +303,7 @@ err:
void ath9k_exit_debug(struct ath_softc *sc)
{
debugfs_remove(sc->sc_debug.debugfs_tsf);
debugfs_remove(sc->sc_debug.debugfs_interrupt);
debugfs_remove(sc->sc_debug.debugfs_dma);
debugfs_remove(sc->sc_debug.debugfs_phy);