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-rw-r--r--package/kernel/mac80211/patches/657-0055-rtl8xxxu-Fix-reloading-of-driver-for-8188eu-devices.patch72
1 files changed, 72 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/657-0055-rtl8xxxu-Fix-reloading-of-driver-for-8188eu-devices.patch b/package/kernel/mac80211/patches/657-0055-rtl8xxxu-Fix-reloading-of-driver-for-8188eu-devices.patch
new file mode 100644
index 0000000000..0a55888fd3
--- /dev/null
+++ b/package/kernel/mac80211/patches/657-0055-rtl8xxxu-Fix-reloading-of-driver-for-8188eu-devices.patch
@@ -0,0 +1,72 @@
+From 8e911ff6eeeb1607dbc05d1782fd9c5cb54db068 Mon Sep 17 00:00:00 2001
+From: Jes Sorensen <Jes.Sorensen@redhat.com>
+Date: Wed, 14 Sep 2016 14:10:42 -0400
+Subject: [PATCH] rtl8xxxu: Fix reloading of driver for 8188eu devices
+
+For 8188eu, once the MAC is asked to power down by setting
+APS_FSMCO_MAC_OFF, there seems to be no way to bring it back to life.
+
+In addition, only disable RF_ENABLE in RF_CTRL rather than all bits.
+
+This was spotted by Andrea Merello who noticed that if we dropped the
+call to rtl8188eu_active_to_emu() reloading started working.
+
+Reported-by: Andrea Merello <andrea.merello@gmail.com>
+Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
+---
+ .../net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c | 29 +++++-----------------
+ 1 file changed, 6 insertions(+), 23 deletions(-)
+
+--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c
++++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c
+@@ -1160,37 +1160,18 @@ exit:
+ static int rtl8188eu_active_to_emu(struct rtl8xxxu_priv *priv)
+ {
+ u8 val8;
+- int count, ret = 0;
+
+ /* Turn off RF */
+- rtl8xxxu_write8(priv, REG_RF_CTRL, 0);
++ val8 = rtl8xxxu_read8(priv, REG_RF_CTRL);
++ val8 &= ~RF_ENABLE;
++ rtl8xxxu_write8(priv, REG_RF_CTRL, val8);
+
+ /* LDO Sleep mode */
+ val8 = rtl8xxxu_read8(priv, REG_LPLDO_CTRL);
+ val8 |= BIT(4);
+ rtl8xxxu_write8(priv, REG_LPLDO_CTRL, val8);
+
+- /* 0x0005[1] = 1 turn off MAC by HW state machine*/
+- val8 = rtl8xxxu_read8(priv, REG_APS_FSMCO + 1);
+- val8 |= BIT(1);
+- rtl8xxxu_write8(priv, REG_APS_FSMCO + 1, val8);
+-
+- for (count = RTL8XXXU_MAX_REG_POLL; count; count--) {
+- val8 = rtl8xxxu_read8(priv, REG_APS_FSMCO + 1);
+- if ((val8 & BIT(1)) == 0)
+- break;
+- udelay(10);
+- }
+-
+- if (!count) {
+- dev_warn(&priv->udev->dev, "%s: Disabling MAC timed out\n",
+- __func__);
+- ret = -EBUSY;
+- goto exit;
+- }
+-
+-exit:
+- return ret;
++ return 0;
+ }
+
+ static int rtl8188eu_emu_to_disabled(struct rtl8xxxu_priv *priv)
+@@ -1372,6 +1353,8 @@ void rtl8188eu_power_off(struct rtl8xxxu
+
+ static void rtl8188e_enable_rf(struct rtl8xxxu_priv *priv)
+ {
++ rtl8xxxu_write8(priv, REG_RF_CTRL, RF_ENABLE | RF_RSTB | RF_SDMRSTB);
++
+ rtl8xxxu_write8(priv, REG_TXPAUSE, 0x00);
+ }
+