As a temporary work-around (read: until there's a nice API for exposing

and controlling this form of antenna diversity) - print out the AR9285
antenna diversity configuration at attach time.

This will help track down and diagose if/when people have connectivity
issues on cards (eg if they connect a single antenna to LNA1, yet the
card has RX configured to only occur on LNA2.)

Tested:

* AR9285 w/ antenna diversity enabled in EEPROM;
* AR9285 w/ antenna diversity disabled in EEPROM; mapping only to a
  single antenna (LNA1.)

1 files changed, 29 insertions, 0 deletions

diff --git a/sys/dev/ath/ath_hal/ar9002/ar9285_attach.c b/sys/dev/ath/ath_hal/ar9002/ar9285_attach.c
index 67a15b8..ce31174 100644
--- a/sys/dev/ath/ath_hal/ar9002/ar9285_attach.c
+++ b/sys/dev/ath/ath_hal/ar9002/ar9285_attach.c
@@ -105,6 +105,28 @@ ar9285AniSetup(struct ath_hal *ah)
         ar5416AniAttach(ah, &aniparams, &aniparams, AH_TRUE);
 }
 
+static const char * ar9285_lna_conf[] = {
+	"LNA1-LNA2",
+	"LNA2",
+	"LNA1",
+	"LNA1+LNA2",
+};
+
+static void
+ar9285_eeprom_print_diversity_settings(struct ath_hal *ah)
+{
+	const HAL_EEPROM_v4k *ee = AH_PRIVATE(ah)->ah_eeprom;
+	const MODAL_EEP4K_HEADER *pModal = &ee->ee_base.modalHeader;
+
+	ath_hal_printf(ah, "[ath] AR9285 Main LNA config: %s\n",
+	    ar9285_lna_conf[(pModal->antdiv_ctl2 >> 2) & 0x3]);
+	ath_hal_printf(ah, "[ath] AR9285 Alt LNA config: %s\n",
+	    ar9285_lna_conf[pModal->antdiv_ctl2 & 0x3]);
+	ath_hal_printf(ah, "[ath] LNA diversity %s, Diversity %s\n",
+	    ((pModal->antdiv_ctl1 & 0x1) ? "enabled" : "disabled"),
+	    ((pModal->antdiv_ctl1 & 0x8) ? "enabled" : "disabled"));
+}
+
 /*
  * Attach for an AR9285 part.
  */
@@ -309,6 +331,13 @@ ar9285Attach(uint16_t devid, HAL_SOFTC sc,
 		goto bad;
 	}
 
+	/*
+	 * Print out the EEPROM antenna configuration mapping.
+	 * Some devices have a hard-coded LNA configuration profile;
+	 * others enable diversity.
+	 */
+	ar9285_eeprom_print_diversity_settings(ah);
+
 	/* Print out whether the EEPROM settings enable AR9285 diversity */
 	if (ar9285_check_div_comb(ah)) {
 		ath_hal_printf(ah, "[ath] Enabling diversity for Kite\n");