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@xxxxxxx>
---
diff -urN compat-wireless-2009-01-19/drivers/net/wireless/ath9k/ath9k.h compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/ath9k.h
--- compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/ath9k.h 2009-01-19 20:07:21.000000000 +0100
+++ compat-wireless-2009-01-19/drivers/net/wireless/ath9k/ath9k.h 2009-01-23 01:54:41.000000000 +0100
@@ -916,6 +916,7 @@
bool ath9k_hw_setbssidmask(struct ath_hal *ah, const u8 *mask);
void ath9k_hw_write_associd(struct ath_hal *ah, const u8 *bssid, u16 assocId);
u64 ath9k_hw_gettsf64(struct ath_hal *ah);
+void ath9k_hw_settsf64(struct ath_hal *ah, u64 tsf64);
void ath9k_hw_reset_tsf(struct ath_hal *ah);
bool ath9k_hw_set_tsfadjust(struct ath_hal *ah, u32 setting);
bool ath9k_hw_setslottime(struct ath_hal *ah, u32 us);
diff -urN compat-wireless-2009-01-19/drivers/net/wireless/ath9k/core.h compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/core.h
--- compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/core.h 2009-01-19 20:07:21.000000000 +0100
+++ compat-wireless-2009-01-19/drivers/net/wireless/ath9k/core.h 2009-01-23 02:40:53.000000000 +0100
@@ -141,6 +141,7 @@
struct dentry *debugfs_phy;
struct dentry *debugfs_dma;
struct dentry *debugfs_interrupt;
+ struct dentry *debugfs_tsf;
struct ath_stats stats;
};
diff -urN compat-wireless-2009-01-19/drivers/net/wireless/ath9k/debug.c compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/debug.c
--- compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/debug.c 2009-01-19 20:07:21.000000000 +0100
+++ compat-wireless-2009-01-19/drivers/net/wireless/ath9k/debug.c 2009-01-23 02:45:34.000000000 +0100
@@ -222,6 +222,49 @@
.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 @@
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 @@
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);
diff -urN compat-wireless-2009-01-19/drivers/net/wireless/ath9k/hw.c compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/hw.c
--- compat-wireless-2009-01-19.orig/drivers/net/wireless/ath9k/hw.c 2009-01-19 20:07:21.000000000 +0100
+++ compat-wireless-2009-01-19/drivers/net/wireless/ath9k/hw.c 2009-01-23 02:39:11.000000000 +0100
@@ -3810,6 +3810,13 @@
return tsf;
}
+void ath9k_hw_settsf64(struct ath_hal *ah, u64 tsf64)
+{
+ REG_WRITE(ah, AR_TSF_L32, 0x00000000);
+ REG_WRITE(ah, AR_TSF_U32, (tsf64 >> 32) & 0xffffffff);
+ REG_WRITE(ah, AR_TSF_L32, tsf64 & 0xffffffff);
+}
+
void ath9k_hw_reset_tsf(struct ath_hal *ah)
{
int count;
--
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