wlcore: add quirk to disable ELP

ELP is a very complicated process in the firmware.  Due to its
complexity, in some early firmware revisions, the ELP feature is
disabled.  To support this cases, this patch adds a quirk that
disables ELP mode.

When ELP is not supported, do not attempt to enter ELP when requested by
the driver.
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/ti/wlcore/boot.c

@@ -408,11 +408,6 @@ int wlcore_boot_run_firmware(struct wl1271 *wl)
 	wl1271_debug(DEBUG_MAILBOX, "MBOX ptrs: 0x%x 0x%x",
 		     wl->mbox_ptr[0], wl->mbox_ptr[1]);
 
-	/*
-	 * TODO: wl12xx used to set the partition here, but it seems
-	 * that it can be done later.  Make sure this is okay.
-	 */
-
 	wl1271_boot_fw_version(wl);
 
 	/*

drivers/net/wireless/ti/wlcore/init.c

@@ -581,12 +581,19 @@ int wl1271_init_vif_specific(struct wl1271 *wl, struct ieee80211_vif *vif)
 			if (ret < 0)
 				return ret;
 		} else if (!wl->sta_count) {
+			if (wl->quirks & WLCORE_QUIRK_NO_ELP) {
+				/* Configure for power always on */
+				ret = wl1271_acx_sleep_auth(wl, WL1271_PSM_CAM);
+				if (ret < 0)
+					return ret;
+			} else {
 				/* Configure for ELP power saving */
 				ret = wl1271_acx_sleep_auth(wl, WL1271_PSM_ELP);
 				if (ret < 0)
 					return ret;
 			}
 		}
+	}
 
 	/* Mode specific init */
 	if (is_ap) {

drivers/net/wireless/ti/wlcore/ps.c

@@ -73,6 +73,9 @@ void wl1271_ps_elp_sleep(struct wl1271 *wl)
 {
 	struct wl12xx_vif *wlvif;
 
+	if (wl->quirks & WLCORE_QUIRK_NO_ELP)
+		return;
+
 	/* we shouldn't get consecutive sleep requests */
 	if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
 		return;

drivers/net/wireless/ti/wlcore/wlcore.h

@@ -324,6 +324,9 @@ int wlcore_free_hw(struct wl1271 *wl);
 /* Older firmwares use an old NVS format */
 #define WLCORE_QUIRK_LEGACY_NVS			BIT(5)
 
+/* Some firmwares may not support ELP */
+#define WLCORE_QUIRK_NO_ELP			BIT(6)
+
 /* TODO: move to the lower drivers when all usages are abstracted */
 #define CHIP_ID_1271_PG10              (0x4030101)
 #define CHIP_ID_1271_PG20              (0x4030111)