Re: "Intel Centrino Advanced-N + WiMAX 6250" doesn't work

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Tz-Huan Huang wrote:
> Hi,
> 
> I have a lenovo X201s with a "Intel Centrino Advanced-N + WiMAX 6250" bundled.
> The device seems recognized as iwn0 correctly but it just doesn't work.
> The command "ifconfig wlan0 up scan" return immediately and nothing showed.
> 
> Is the device not supported, or do I miss something?
> Any suggestion is welcome, thanks.
> 
> Here is some information:
> 
> $ uname -a
> FreeBSD bud 9.0-BETA2 FreeBSD 9.0-BETA2 #2: Tue Sep  6 16:50:09 CST
> 2011     root@bud:/usr/obj/usr/src/sys/BUD  amd64
> 
> dmesg -a:
> http://www.csie.ntu.edu.tw/~b90093/tmp/dmesg.txt
> 
> rc.conf:
> http://www.csie.ntu.edu.tw/~b90093/tmp/rc.conf
> 
> kldstat -v
> http://www.csie.ntu.edu.tw/~b90093/tmp/kldstat.txt


Please try attached patch. It seems like OpenBSD added support 
for 6205, but I'm not sure if it works for 6250. 

> Tz-Huan

	Kevin

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Index: sys/dev/iwn/if_iwnreg.h
===================================================================

--- sys/dev/iwn/if_iwnreg.h	(revision 225433)
+++ sys/dev/iwn/if_iwnreg.h	(working copy)
@@ -739,6 +739,8 @@
 struct iwn5000_calib_elem {
 	uint32_t	enable;
 	uint32_t	start;
+#define	IWN5000_CALIB_DC	(1 << 1)
+
 	uint32_t	send;
 	uint32_t	apply;
 	uint32_t	reserved;
Index: sys/dev/iwn/if_iwn.c
===================================================================
--- sys/dev/iwn/if_iwn.c	(revision 225433)
+++ sys/dev/iwn/if_iwn.c	(working copy)
@@ -245,6 +245,7 @@
 static int	iwn_set_pslevel(struct iwn_softc *, int, int, int);
 static int	iwn_send_btcoex(struct iwn_softc *);
 static int	iwn_send_advanced_btcoex(struct iwn_softc *);
+static int	iwn5000_runtime_calib(struct iwn_softc *);
 static int	iwn_config(struct iwn_softc *);
 static uint8_t	*ieee80211_add_ssid(uint8_t *, const uint8_t *, u_int);
 static int	iwn_scan(struct iwn_softc *);
@@ -2594,6 +2595,14 @@
 		return;
 	}
 
+	/*
+	 * XXX Differential gain calibration makes the 6005 firmware
+	 * crap out, so skip it for now.  This effectively disables
+	 * sensitivity tuning as well.
+	 */
+	if (sc->hw_type == IWN_HW_REV_TYPE_6005)
+		return;
+
 	if (calib->state == IWN_CALIB_STATE_ASSOC)
 		iwn_collect_noise(sc, &stats->rx.general);
 	else if (calib->state == IWN_CALIB_STATE_RUN)
@@ -4995,6 +5004,19 @@
 }
 
 static int
+iwn5000_runtime_calib(struct iwn_softc *sc)
+{
+	struct iwn5000_calib_config cmd;
+
+	memset(&cmd, 0, sizeof cmd);
+	cmd.ucode.once.enable = 0xffffffff;
+	cmd.ucode.once.start = IWN5000_CALIB_DC;
+	DPRINTF(sc, IWN_DEBUG_CALIBRATE,
+	    "%s: configuring runtime calibration\n", __func__);
+	return iwn_cmd(sc, IWN5000_CMD_CALIB_CONFIG, &cmd, sizeof(cmd), 0);
+}
+
+static int
 iwn_config(struct iwn_softc *sc)
 {
 	struct iwn_ops *ops = &sc->ops;
@@ -5014,6 +5036,18 @@
 		}
 	}
 
+	if (sc->hw_type == IWN_HW_REV_TYPE_6050 ||
+	    sc->hw_type == IWN_HW_REV_TYPE_6005) {
+		/* Configure runtime DC calibration. */
+		error = iwn5000_runtime_calib(sc);
+		if (error != 0) {
+			device_printf(sc->sc_dev,
+			    "%s: could not configure runtime calibration\n",
+			    __func__);
+			return error;
+		}
+	}
+
 	/* Configure valid TX chains for >=5000 Series. */
 	if (sc->hw_type != IWN_HW_REV_TYPE_4965) {
 		txmask = htole32(sc->txchainmask);

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