From 8b861715087fe17796fe411eff1c7f7e493d0d10 Mon Sep 17 00:00:00 2001 From: Sujith Manoharan Date: Fri, 30 Jan 2015 19:05:30 +0530 Subject: [PATCH] ath9k: Add a debugfs file for WOW This can be used to force WOW for cards that are not present in the supported PCI ID list. Signed-off-by: Sujith Manoharan Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath9k/ath9k.h | 1 + drivers/net/wireless/ath/ath9k/debug.c | 68 ++++++++++++++++++++++++++ drivers/net/wireless/ath/ath9k/wow.c | 4 +- 3 files changed, 71 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 803a7d4ff1b2..20216c56e158 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -1044,6 +1044,7 @@ struct ath_softc { #ifdef CONFIG_ATH9K_WOW u32 wow_intr_before_sleep; + bool force_wow; #endif }; diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c index dd5d3914799b..50a2e0ac3b8b 100644 --- a/drivers/net/wireless/ath/ath9k/debug.c +++ b/drivers/net/wireless/ath/ath9k/debug.c @@ -1043,6 +1043,69 @@ static const struct file_operations fops_ackto = { }; #endif +#ifdef CONFIG_ATH9K_WOW + +static ssize_t read_file_wow(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath_softc *sc = file->private_data; + unsigned int len = 0, size = 32; + ssize_t retval; + char *buf; + + buf = kzalloc(size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len += scnprintf(buf + len, size - len, "WOW: %s\n", + sc->force_wow ? "ENABLED" : "DISABLED"); + + if (len > size) + len = size; + + retval = simple_read_from_buffer(user_buf, count, ppos, buf, len); + kfree(buf); + + return retval; +} + +static ssize_t write_file_wow(struct file *file, const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath_softc *sc = file->private_data; + unsigned long val; + 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 (kstrtoul(buf, 0, &val)) + return -EINVAL; + + if (val != 1) + return -EINVAL; + + if (!sc->force_wow) { + sc->force_wow = true; + ath9k_init_wow(sc->hw); + } + + return count; +} + +static const struct file_operations fops_wow = { + .read = read_file_wow, + .write = write_file_wow, + .open = simple_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + +#endif + static ssize_t read_file_tpc(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { @@ -1313,6 +1376,11 @@ int ath9k_init_debug(struct ath_hw *ah) &fops_btcoex); #endif +#ifdef CONFIG_ATH9K_WOW + debugfs_create_file("wow", S_IRUSR | S_IWUSR, + sc->debug.debugfs_phy, sc, &fops_wow); +#endif + #ifdef CONFIG_ATH9K_DYNACK debugfs_create_file("ack_to", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy, sc, &fops_ackto); diff --git a/drivers/net/wireless/ath/ath9k/wow.c b/drivers/net/wireless/ath/ath9k/wow.c index d4cfbc363eb5..4b3b56563714 100644 --- a/drivers/net/wireless/ath/ath9k/wow.c +++ b/drivers/net/wireless/ath/ath9k/wow.c @@ -327,7 +327,7 @@ void ath9k_init_wow(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; - if (sc->driver_data & ATH9K_PCI_WOW) { + if ((sc->driver_data & ATH9K_PCI_WOW) || sc->force_wow) { hw->wiphy->wowlan = &ath9k_wowlan_support; device_init_wakeup(sc->dev, 1); } @@ -337,6 +337,6 @@ void ath9k_deinit_wow(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; - if (sc->driver_data & ATH9K_PCI_WOW) + if ((sc->driver_data & ATH9K_PCI_WOW) || sc->force_wow) device_init_wakeup(sc->dev, 0); } -- 2.20.1