Rt3070usb

Intro

This page explains how to get the rt3070usb (aka rt3070sta) linux driver working in openembedded for the overo on Lisa.

Background

I have an edimax usb wifi stick I needed to get working with Lisa. It's USB id is 7392:7711. Initial search seemed to show the rt2870usb driver was the one to use, and I guess at one time that might have been the case for the chip in this stick. But rt3070usb is now the one to use.

There's a recipe for the rt3070 driver in openembedded (which I'm pulling from : ). It doesn't compile for me for two reasons :

• 1. My linux kernel has real-time patches so the init_MUTEX() in the driver source can't be found
• 2. Some sort of device structure change has occurred in the kernel since who knows when

The fixes are:

• 1. replace init_MUTEX(blah) with sema_init(blah,1)
• 2. Apply patch from http://lists.rpmfusion.org/pipermail/rpmfusion-commits/2009-August/005943.html (copied below just in case)

Configuration

insmod rt3070sta.ko

at this point iwconfig shows an ra0 interface

ifconfig ra0 up

iwconfig ra0 essid ap_h16

wpa_supplicant

As usual, the wpa key goes in /etc/wpa_supplicant.conf and started wpa_supplicant with

wpa_supplicant -ira0 -c/etc/wpa_supplicant.conf &

DHCP

dhclient ra0

Console output

root@overo:/home/paul# iwconfig ra0
ra0       RT2870 Wireless  ESSID:"ap_h16"  Nickname:"RT2870STA"
          Mode:Managed  Frequency=2.412 GHz  Access Point: 00:25:4B:06:E3:9F   
          Bit Rate=65 Mb/s   
          RTS thr:off   Fragment thr:off
          Encryption key:447F-01CB-C235-6BF1-0F8C-0E61-5C88-EEEA
          Link Quality=100/100  Signal level:-39 dBm  Noise level:-83 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

root@overo:/home/paul# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 7392:7711  
root@overo:/home/paul# ping bill

PING bill.recherche.enac.fr (10.31.4.5) 56(84) bytes of data.
64 bytes from bill.recherche.enac.fr (10.31.4.5): icmp_seq=1 ttl=64 time=367 ms
^C
--- bill.recherche.enac.fr ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 367.279/367.279/367.279/0.000 ms
root@overo:/home/paul# WPA: Group rekeying completed with 00:25:4b:06:e3:9f [GTK=TKIP]

Patch

diff -rupN 2009_0525_RT3070_Linux_STA_v2.1.1.0.old/include/rtmp_os.h 2009_0525_RT3070_Linux_STA_v2.1.1.0/include/rtmp_os.h
--- 2009_0525_RT3070_Linux_STA_v2.1.1.0.old/include/rtmp_os.h	2009-05-20 23:33:56.000000000 -0400
+++ 2009_0525_RT3070_Linux_STA_v2.1.1.0/include/rtmp_os.h	2009-08-04 00:00:46.000000000 -0400
@@ -53,6 +53,7 @@
 */
 typedef struct _RTMP_OS_NETDEV_OP_HOOK_
 {
+  /*
 	void			*open;
 	void			*stop;
 	void			*xmit;
@@ -63,6 +64,8 @@ typedef struct _RTMP_OS_NETDEV_OP_HOOK_
 	unsigned char devAddr[6];
 	unsigned char	devName[16];
 	unsigned char	needProtcted;
+  */
+  struct net_device_ops *netdev_ops;
 }RTMP_OS_NETDEV_OP_HOOK, *PRTMP_OS_NETDEV_OP_HOOK;
 
 
diff -rupN 2009_0525_RT3070_Linux_STA_v2.1.1.0.old/os/linux/rt_linux.c 2009_0525_RT3070_Linux_STA_v2.1.1.0/os/linux/rt_linux.c
--- 2009_0525_RT3070_Linux_STA_v2.1.1.0.old/os/linux/rt_linux.c	2009-05-20 23:33:56.000000000 -0400
+++ 2009_0525_RT3070_Linux_STA_v2.1.1.0/os/linux/rt_linux.c	2009-08-04 00:04:15.000000000 -0400
@@ -1506,20 +1506,21 @@ int RtmpOSNetDevAttach(
 	if (pDevOpHook)
 	{
 		PRTMP_ADAPTER pAd = RTMP_OS_NETDEV_GET_PRIV(pNetDev);
-	
+		pNetDev->netdev_ops = pDevOpHook->netdev_ops;
+		/*	
 		pNetDev->open			= pDevOpHook->open;
 		pNetDev->stop			= pDevOpHook->stop;
 		pNetDev->hard_start_xmit	= (HARD_START_XMIT_FUNC)(pDevOpHook->xmit);
 		pNetDev->do_ioctl		= pDevOpHook->ioctl;
-		
+		*/
 		/* if you don't implement get_stats, just leave the callback function as NULL, a dummy 
 		     function will make kernel panic.
 		*/
-		if (pDevOpHook->get_stats)
+		/*if (pDevOpHook->get_stats)
 			pNetDev->get_stats = pDevOpHook->get_stats;
-
+		*/
 		/* OS specific flags, here we used to indicate if we are virtual interface */
-		pNetDev->priv_flags = pDevOpHook->priv_flags; 
+		//		pNetDev->priv_flags = pDevOpHook->priv_flags; 
 
 #if (WIRELESS_EXT < 21) && (WIRELESS_EXT >= 12)
 		pNetDev->get_wireless_stats = rt28xx_get_wireless_stats;
@@ -1544,15 +1545,15 @@ int RtmpOSNetDevAttach(
 #endif // CONFIG_APSTA_MIXED_SUPPORT //
 
 		// copy the net device mac address to the net_device structure.
-		NdisMoveMemory(pNetDev->dev_addr, &pDevOpHook->devAddr[0], MAC_ADDR_LEN);
+		//		NdisMoveMemory(pNetDev->dev_addr, &pDevOpHook->devAddr[0], MAC_ADDR_LEN);
 
-		rtnl_locked = pDevOpHook->needProtcted;
+		//		rtnl_locked = pDevOpHook->needProtcted;
 	}
-
+	/*
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
 	pNetDev->validate_addr = NULL;
 #endif
-
+	*/
 	if (rtnl_locked)
 		ret = register_netdevice(pNetDev);
 	else
diff -rupN 2009_0525_RT3070_Linux_STA_v2.1.1.0.old/os/linux/rt_main_dev.c 2009_0525_RT3070_Linux_STA_v2.1.1.0/os/linux/rt_main_dev.c
--- 2009_0525_RT3070_Linux_STA_v2.1.1.0.old/os/linux/rt_main_dev.c	2009-05-20 23:33:56.000000000 -0400
+++ 2009_0525_RT3070_Linux_STA_v2.1.1.0/os/linux/rt_main_dev.c	2009-08-04 00:06:08.000000000 -0400
@@ -504,6 +504,21 @@ err:
 	return (-1);
 } /* End of rt28xx_open */
 
+static const struct net_device_ops rt2870_netdev_ops = {
+  .ndo_open               = MainVirtualIF_open,//
+  .ndo_stop               = MainVirtualIF_close,//
+  .ndo_do_ioctl           = rt28xx_ioctl,//
+  .ndo_get_stats          = RT28xx_get_ether_stats,//
+  .ndo_validate_addr      = NULL,
+  .ndo_set_mac_address    = eth_mac_addr,
+  .ndo_change_mtu         = eth_change_mtu,
+#ifdef IKANOS_VX_1X0
+  .ndo_start_xmit         = IKANOS_DataFramesTx,//
+#else
+  .ndo_start_xmit         = rt28xx_send_packets,//
+#endif
+};
+
 
 PNET_DEV RtmpPhyNetDevInit(
 	IN RTMP_ADAPTER *pAd,
@@ -520,6 +535,8 @@ PNET_DEV RtmpPhyNetDevInit(
 	}
 
 	NdisZeroMemory((unsigned char *)pNetDevHook, sizeof(RTMP_OS_NETDEV_OP_HOOK));
+	pNetDevHook->netdev_ops = &rt2870_netdev_ops;
+	/*
 	pNetDevHook->open = MainVirtualIF_open;
 	pNetDevHook->stop = MainVirtualIF_close;
 	pNetDevHook->xmit = rt28xx_send_packets;
@@ -531,7 +548,7 @@ PNET_DEV RtmpPhyNetDevInit(
 	pNetDevHook->get_stats = RT28xx_get_ether_stats;
 
 	pNetDevHook->needProtcted = FALSE;
-
+	*/
 	RTMP_OS_NETDEV_SET_PRIV(net_dev, pAd);
 	//net_dev->priv = (PVOID)pAd;
 	pAd->net_dev = net_dev;