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Reply-To: tjcw@cantab.net
From:   Chris Ward <tjcw01@gmail.com>
Subject: Realtek wifi adapter
To:     linux-kernel@vger.kernel.org
Message-ID: <afcedf77-a21c-ebb0-77be-d8b886d6cf7f@gmail.com>
Date:   Sun, 28 Oct 2018 09:44:21 +0000
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Does anyone want to add 
https://www.amazon.co.uk/gp/product/B07C4JQZSP/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1 
to the set of modules built with the Linux kernel ?

I recently bought one of these. It came with source code for a Linux 
kernel driver, but it didn't work with the latest OpenSuSE Tumbleweed 
kernel, so I developed a patch (attached) to fix it. OpenSuSE Tumbleweed 
is only a few weeks behind the kernel.org 'latest', so shouldn't be too 
hard to integrate with the bleeding edge kernel.

You can take my patch as GPL2 or later, and I presume the 
RealTek-supplied code is GPL2; it is in the package from Amazon, or you 
can email me (tjcw at cantab.net) if you want a copy from me.

-- 
Chris Ward


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diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index 7a8e8ab..0000000
--- a/LICENSE
+++ /dev/null
@@ -1,340 +0,0 @@
-		    GNU GENERAL PUBLIC LICENSE
-		       Version 2, June 1991
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- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
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diff --git a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/hal/phydm/phydm_interface.c b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/hal/phydm/phydm_interface.c
index 9d67264..d3684d8 100644
--- a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/hal/phydm/phydm_interface.c
+++ b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/hal/phydm/phydm_interface.c
@@ -564,7 +564,7 @@ odm_set_timer(
 #if (DM_ODM_SUPPORT_TYPE & ODM_AP)
 	mod_timer(p_timer, jiffies + RTL_MILISECONDS_TO_JIFFIES(ms_delay));
 #elif (DM_ODM_SUPPORT_TYPE & ODM_CE)
-	_set_timer(p_timer, ms_delay); /* ms */
+	_set_timer((_timer *)p_timer, ms_delay); /* ms */
 #elif (DM_ODM_SUPPORT_TYPE & ODM_WIN)
 	struct _ADAPTER		*adapter = p_dm_odm->adapter;
 	PlatformSetTimer(adapter, p_timer, ms_delay);
@@ -588,7 +588,7 @@ odm_initialize_timer(
 	/*mod_timer(p_timer, jiffies+RTL_MILISECONDS_TO_JIFFIES(10));	*/
 #elif (DM_ODM_SUPPORT_TYPE & ODM_CE)
 	struct _ADAPTER *adapter = p_dm_odm->adapter;
-	_init_timer(p_timer, adapter->pnetdev, call_back_func, p_dm_odm);
+	_init_timer((_timer *)p_timer, adapter->pnetdev, call_back_func, p_dm_odm);
 #elif (DM_ODM_SUPPORT_TYPE & ODM_WIN)
 	struct _ADAPTER *adapter = p_dm_odm->adapter;
 	PlatformInitializeTimer(adapter, p_timer, call_back_func, p_context, sz_id);
@@ -605,7 +605,7 @@ odm_cancel_timer(
 #if (DM_ODM_SUPPORT_TYPE & ODM_AP)
 	del_timer(p_timer);
 #elif (DM_ODM_SUPPORT_TYPE & ODM_CE)
-	_cancel_timer_ex(p_timer);
+	_cancel_timer_ex((_timer *)p_timer);
 #elif (DM_ODM_SUPPORT_TYPE & ODM_WIN)
 	struct _ADAPTER *adapter = p_dm_odm->adapter;
 	PlatformCancelTimer(adapter, p_timer);
diff --git a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service.h b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service.h
index 4d7c1f0..55e9b7e 100644
--- a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service.h
+++ b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service.h
@@ -355,7 +355,7 @@ extern void rtw_init_timer(_timer *ptimer, void *padapter, void *pfunc);
 __inline static unsigned char _cancel_timer_ex(_timer *ptimer)
 {
 #ifdef PLATFORM_LINUX
-	return del_timer_sync(ptimer);
+	return del_timer_sync((struct timer_list *)ptimer);
 #endif
 #ifdef PLATFORM_FREEBSD
 	_cancel_timer(ptimer, 0);
diff --git a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service_linux.h b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service_linux.h
index 43fa41f..7379e8d 100644
--- a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service_linux.h
+++ b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/include/osdep_service_linux.h
@@ -148,7 +148,14 @@ typedef	spinlock_t	_lock;
 #else
 	typedef struct semaphore	_mutex;
 #endif
-typedef struct timer_list _timer;
+// tjcw we need timer list to have a 'void *' as well
+struct _timer_entry {
+	struct timer_list t_list ;
+	void (*callback)(unsigned long) ;
+	unsigned long data ;
+} ;
+typedef struct _timer_entry _timer ;
+//typedef struct timer_list _timer;
 
 struct	__queue	{
 	struct	list_head	queue;
@@ -281,22 +288,30 @@ __inline static void rtw_list_delete(_list *plist)
 
 #define RTW_TIMER_HDL_ARGS void *FunctionContext
 
+// tjcw timer_list does not have 'data' any more. See what breaks without it.
+static void _timer_function(struct timer_list *ptimer)
+{
+	_timer *myptimer = (_timer *) ptimer ;
+	myptimer->callback(myptimer->data) ;
+}
 __inline static void _init_timer(_timer *ptimer, _nic_hdl nic_hdl, void *pfunc, void *cntx)
 {
 	/* setup_timer(ptimer, pfunc,(u32)cntx);	 */
-	ptimer->function = pfunc;
-	ptimer->data = (unsigned long)cntx;
-	init_timer(ptimer);
+//	ptimer->t_list.function = pfunc;
+	ptimer->callback=pfunc ;
+	ptimer->data = (unsigned long) cntx;
+//	init_timer((struct timer_list *)ptimer);
+	timer_setup((struct timer_list *)ptimer, _timer_function, 0);
 }
 
 __inline static void _set_timer(_timer *ptimer, u32 delay_time)
 {
-	mod_timer(ptimer , (jiffies + (delay_time * HZ / 1000)));
+	mod_timer((struct timer_list *)ptimer , (jiffies + (delay_time * HZ / 1000)));
 }
 
 __inline static void _cancel_timer(_timer *ptimer, u8 *bcancelled)
 {
-	del_timer_sync(ptimer);
+	del_timer_sync((struct timer_list *)ptimer);
 	*bcancelled = 1;
 }
 
diff --git a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/linux/ioctl_cfg80211.c b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/linux/ioctl_cfg80211.c
index 6d40a42..c6fbf96 100644
--- a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/linux/ioctl_cfg80211.c
+++ b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/linux/ioctl_cfg80211.c
@@ -737,24 +737,37 @@ check_bss:
 	if (rtw_to_roam(padapter) > 0) {
 		#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 39) || defined(COMPAT_KERNEL_RELEASE)
 		struct wiphy *wiphy = pwdev->wiphy;
+		struct cfg80211_roam_info roam_info = {} ;
 		struct ieee80211_channel *notify_channel;
 		u32 freq;
 		u16 channel = cur_network->network.Configuration.DSConfig;
 
 		freq = rtw_ch2freq(channel);
 		notify_channel = ieee80211_get_channel(wiphy, freq);
-		#endif
+		roam_info.channel = notify_channel;
+				roam_info.bssid = cur_network->network.MacAddress;
+				roam_info.req_ie =
+					pmlmepriv->assoc_req+sizeof(struct ieee80211_hdr_3addr)+2;
+				roam_info.req_ie_len =
+					pmlmepriv->assoc_req_len-sizeof(struct ieee80211_hdr_3addr)-2;
+				roam_info.resp_ie =
+					pmlmepriv->assoc_rsp+sizeof(struct ieee80211_hdr_3addr)+6;
+				roam_info.resp_ie_len =
+					pmlmepriv->assoc_rsp_len-sizeof(struct ieee80211_hdr_3addr)-6;
+				#endif
 
 		RTW_INFO(FUNC_ADPT_FMT" call cfg80211_roamed\n", FUNC_ADPT_ARG(padapter));
 		cfg80211_roamed(padapter->pnetdev
 			#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 39) || defined(COMPAT_KERNEL_RELEASE)
-			, notify_channel
-			#endif
+//			, notify_channel
+			, &roam_info
+            #else
 			, cur_network->network.MacAddress
 			, pmlmepriv->assoc_req + sizeof(struct rtw_ieee80211_hdr_3addr) + 2
 			, pmlmepriv->assoc_req_len - sizeof(struct rtw_ieee80211_hdr_3addr) - 2
 			, pmlmepriv->assoc_rsp + sizeof(struct rtw_ieee80211_hdr_3addr) + 6
 			, pmlmepriv->assoc_rsp_len - sizeof(struct rtw_ieee80211_hdr_3addr) - 6
+            #endif
 			, GFP_ATOMIC);
 #ifdef CONFIG_RTW_80211R
 		if ((rtw_to_roam(padapter) > 0) && rtw_chk_ft_flags(padapter, RTW_FT_SUPPORTED))
@@ -1739,7 +1752,8 @@ enum nl80211_iftype {
 #endif
 static int cfg80211_rtw_change_iface(struct wiphy *wiphy,
 				     struct net_device *ndev,
-				     enum nl80211_iftype type, u32 *flags,
+				     enum nl80211_iftype type,
+//					 u32 *flags,
 				     struct vif_params *params)
 {
 	enum nl80211_iftype old_type;
@@ -3818,7 +3832,7 @@ static int rtw_cfg80211_add_monitor_if(_adapter *padapter, char *name, struct ne
 	mon_ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 	strncpy(mon_ndev->name, name, IFNAMSIZ);
 	mon_ndev->name[IFNAMSIZ - 1] = 0;
-	mon_ndev->destructor = rtw_ndev_destructor;
+	mon_ndev->priv_destructor = rtw_ndev_destructor;
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29))
 	mon_ndev->netdev_ops = &rtw_cfg80211_monitor_if_ops;
@@ -3884,7 +3898,9 @@ static int
 		#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
 		unsigned char name_assign_type,
 		#endif
-		enum nl80211_iftype type, u32 *flags, struct vif_params *params)
+		enum nl80211_iftype type,
+//		u32 *flags,
+		struct vif_params *params)
 {
 	int ret = 0;
 	struct wireless_dev *wdev = NULL;
@@ -6762,7 +6778,7 @@ static void rtw_cfg80211_preinit_wiphy(_adapter *adapter, struct wiphy *wiphy)
 #endif
 
 #if defined(CONFIG_PM) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0))
-	wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
+//	wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 #ifdef CONFIG_PNO_SUPPORT
 	wiphy->max_sched_scan_ssids = MAX_PNO_LIST_COUNT;
 #endif
diff --git a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/osdep_service.c b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/osdep_service.c
index 1fbea5d..927e00c 100644
--- a/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/osdep_service.c
+++ b/Linux/driver/rtl8821AU_WiFi_linux_v5.2.6.2_23547.20170814_COEX20170206-6760/os_dep/osdep_service.c
@@ -1988,7 +1988,7 @@ static int readFile(struct file *fp, char *buf, int len)
 
 	while (sum < len) {
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
-		rlen = __vfs_read(fp, buf + sum, len - sum, &fp->f_pos);
+		rlen = kernel_read(fp, buf + sum, len - sum, &fp->f_pos);
 #else
 		rlen = fp->f_op->read(fp, buf + sum, len - sum, &fp->f_pos);
 #endif
diff --git a/README.md b/README.md
index ac2d8c8..0dbe5d9 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # RTL8811AU
 
-This is the driver for a RealTek WiFi adapter, for OpenSuSE Leap 15.0 Linux. You should be using the leap-15.0 branch, so type 'git checkout leap-15.0' before proceeding.
+This is the driver for a RealTek WiFi adapter, for OpenSuSE Leap 15.0 Linux.
 
 To build this driver, first install the kernel-devel software package through YAST; then go to the Linux/driver/rtl* directory and type 'make'.
 
-To install the driver, in the same directory type 'sudo make install'.
+To install the driver, in the same directory type 'sudo make install'.
\ No newline at end of file

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