brcmfmac: Add wowl support for PCIE devices.

Add basic wowl (magic packet and disconnect) support. This patch adds
this support only for PCIE bus devices. This feature requires FW which
has support for wowl built in.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 83 insertions, 23 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
index 6860501bc179..e9e18e1566dd 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
@@ -37,6 +37,7 @@
 #include "fwil.h"
 #include "proto.h"
 #include "vendor.h"
+#include "dhd_bus.h"
 
 #define BRCMF_SCAN_IE_LEN_MAX		2048
 #define BRCMF_PNO_VERSION		2
@@ -2777,50 +2778,91 @@ static __always_inline void brcmf_delay(u32 ms)
 
 static s32 brcmf_cfg80211_resume(struct wiphy *wiphy)
 {
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
+	struct net_device *ndev = cfg_to_ndev(cfg);
+	struct brcmf_if *ifp = netdev_priv(ndev);
+
 	brcmf_dbg(TRACE, "Enter\n");
 
+	if (cfg->wowl_enabled) {
+		brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PM,
+				      cfg->pre_wowl_pmmode);
+		brcmf_fil_iovar_data_set(ifp, "wowl_pattern", "clr", 4);
+		brcmf_fil_iovar_int_set(ifp, "wowl_clear", 0);
+		cfg->wowl_enabled = false;
+	}
 	return 0;
 }
 
+static void brcmf_configure_wowl(struct brcmf_cfg80211_info *cfg,
+				 struct brcmf_if *ifp,
+				 struct cfg80211_wowlan *wowl)
+{
+	u32 wowl_config;
+
+	brcmf_dbg(TRACE, "Suspend, wowl config.\n");
+
+	brcmf_fil_cmd_int_get(ifp, BRCMF_C_GET_PM, &cfg->pre_wowl_pmmode);
+	brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PM, PM_MAX);
+
+	wowl_config = 0;
+	if (wowl->disconnect)
+		wowl_config |= WL_WOWL_DIS | WL_WOWL_BCN | WL_WOWL_RETR;
+		/* Note: if "wowl" target and not "wowlpf" then wowl_bcn_loss
+		 * should be configured. This paramater is not supported by
+		 * wowlpf.
+		 */
+	if (wowl->magic_pkt)
+		wowl_config |= WL_WOWL_MAGIC;
+	brcmf_fil_iovar_int_set(ifp, "wowl", wowl_config);
+	brcmf_fil_iovar_int_set(ifp, "wowl_activate", 1);
+	brcmf_bus_wowl_config(cfg->pub->bus_if, true);
+	cfg->wowl_enabled = true;
+}
+
 static s32 brcmf_cfg80211_suspend(struct wiphy *wiphy,
-				  struct cfg80211_wowlan *wow)
+				  struct cfg80211_wowlan *wowl)
 {
 	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 	struct net_device *ndev = cfg_to_ndev(cfg);
+	struct brcmf_if *ifp = netdev_priv(ndev);
 	struct brcmf_cfg80211_vif *vif;
 
 	brcmf_dbg(TRACE, "Enter\n");
 
-	/*
-	 * if the primary net_device is not READY there is nothing
+	/* if the primary net_device is not READY there is nothing
 	 * we can do but pray resume goes smoothly.
 	 */
-	vif = ((struct brcmf_if *)netdev_priv(ndev))->vif;
-	if (!check_vif_up(vif))
+	if (!check_vif_up(ifp->vif))
 		goto exit;
 
-	list_for_each_entry(vif, &cfg->vif_list, list) {
-		if (!test_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state))
-			continue;
-		/*
-		 * While going to suspend if associated with AP disassociate
-		 * from AP to save power while system is in suspended state
-		 */
-		brcmf_link_down(vif);
-
-		/* Make sure WPA_Supplicant receives all the event
-		 * generated due to DISASSOC call to the fw to keep
-		 * the state fw and WPA_Supplicant state consistent
-		 */
-		brcmf_delay(500);
-	}
-
 	/* end any scanning */
 	if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
 		brcmf_abort_scanning(cfg);
 
-	/* Turn off watchdog timer */
-	brcmf_set_mpc(netdev_priv(ndev), 1);
+	if (wowl == NULL) {
+		brcmf_bus_wowl_config(cfg->pub->bus_if, false);
+		list_for_each_entry(vif, &cfg->vif_list, list) {
+			if (!test_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state))
+				continue;
+			/* While going to suspend if associated with AP
+			 * disassociate from AP to save power while system is
+			 * in suspended state
+			 */
+			brcmf_link_down(vif);
+			/* Make sure WPA_Supplicant receives all the event
+			 * generated due to DISASSOC call to the fw to keep
+			 * the state fw and WPA_Supplicant state consistent
+			 */
+			brcmf_delay(500);
+		}
+		/* Configure MPC */
+		brcmf_set_mpc(ifp, 1);
+
+	} else {
+		/* Configure WOWL paramaters */
+		brcmf_configure_wowl(cfg, ifp, wowl);
+	}
 
 exit:
 	brcmf_dbg(TRACE, "Exit\n");
@@ -5393,6 +5435,21 @@ static void brcmf_wiphy_pno_params(struct wiphy *wiphy)
 	wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 }
 
+
+#ifdef CONFIG_PM
+static const struct wiphy_wowlan_support brcmf_wowlan_support = {
+	.flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT,
+};
+#endif
+
+static void brcmf_wiphy_wowl_params(struct wiphy *wiphy)
+{
+#ifdef CONFIG_PM
+	/* wowl settings */
+	wiphy->wowlan = &brcmf_wowlan_support;
+#endif
+}
+
 static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
 {
 	struct ieee80211_iface_combination ifc_combo;
@@ -5430,6 +5487,9 @@ static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
 	wiphy->vendor_commands = brcmf_vendor_cmds;
 	wiphy->n_vendor_commands = BRCMF_VNDR_CMDS_LAST - 1;
 
+	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL))
+		brcmf_wiphy_wowl_params(wiphy);
+
 	return brcmf_setup_wiphybands(wiphy);
 }