wl12xx: split channel array per band in sched_scan

The firmware, in practice, treats the channels in three separate
blocks, one for each band (bg, a and j).  Instead of using a single
array and doing some magic with indices, split the array in 3 to make
it more readable.

Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/scan.c

@@ -326,15 +326,15 @@ wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
 				    struct cfg80211_sched_scan_request *req,
 				    struct conn_scan_ch_params *channels,
 				    u32 band, bool radar, bool passive,
-				    int start)
+				    int start, int max_channels)
 {
 	struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
 	int i, j;
 	u32 flags;
 	bool force_passive = !req->n_ssids;
 
 	for (i = 0, j = start;
-	     i < req->n_channels && j < MAX_CHANNELS_ALL_BANDS;
+	     i < req->n_channels && j < max_channels;
 	     i++) {
 		flags = req->channels[i]->flags;
 
@@ -380,54 +380,52 @@ wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
 	return j - start;
 }
 
-static int
+static bool
 wl1271_scan_sched_scan_channels(struct wl1271 *wl,
 				struct cfg80211_sched_scan_request *req,
 				struct wl1271_cmd_sched_scan_config *cfg)
 {
-	int idx = 0;
-
 	cfg->passive[0] =
-		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_2,
 						    IEEE80211_BAND_2GHZ,
-						    false, true, idx);
-	idx += cfg->passive[0];
-
+						    false, true, 0,
+						    MAX_CHANNELS_2GHZ);
 	cfg->active[0] =
-		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_2,
 						    IEEE80211_BAND_2GHZ,
-						    false, false, idx);
-	/*
-	 * 5GHz channels always start at position 14, not immediately
-	 * after the last 2.4GHz channel
-	 */
-	idx = 14;
-
+						    false, false,
+						    cfg->passive[0],
+						    MAX_CHANNELS_2GHZ);
 	cfg->passive[1] =
-		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5,
 						    IEEE80211_BAND_5GHZ,
-						    false, true, idx);
-	idx += cfg->passive[1];
-
+						    false, true, 0,
+						    MAX_CHANNELS_5GHZ);
 	cfg->dfs =
-		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5,
 						    IEEE80211_BAND_5GHZ,
-						    true, true, idx);
-	idx += cfg->dfs;
-
+						    true, true,
+						    cfg->passive[1],
+						    MAX_CHANNELS_5GHZ);
 	cfg->active[1] =
-		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5,
 						    IEEE80211_BAND_5GHZ,
-						    false, false, idx);
-	idx += cfg->active[1];
+						    false, false,
+						    cfg->passive[1] + cfg->dfs,
+						    MAX_CHANNELS_5GHZ);
+	/* 802.11j channels are not supported yet */
+	cfg->passive[2] = 0;
+	cfg->active[2] = 0;
 
 	wl1271_debug(DEBUG_SCAN, "    2.4GHz: active %d passive %d",
 		     cfg->active[0], cfg->passive[0]);
 	wl1271_debug(DEBUG_SCAN, "    5GHz: active %d passive %d",
 		     cfg->active[1], cfg->passive[1]);
 	wl1271_debug(DEBUG_SCAN, "    DFS: %d", cfg->dfs);
 
-	return idx;
+	return  cfg->passive[0] || cfg->active[0] ||
+		cfg->passive[1] || cfg->active[1] || cfg->dfs ||
+		cfg->passive[2] || cfg->active[2];
 }
 
 int wl1271_scan_sched_scan_config(struct wl1271 *wl,
@@ -436,7 +434,7 @@ int wl1271_scan_sched_scan_config(struct wl1271 *wl,
 {
 	struct wl1271_cmd_sched_scan_config *cfg = NULL;
 	struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
-	int i, total_channels, ret;
+	int i, ret;
 	bool force_passive = !req->n_ssids;
 
 	wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
@@ -471,8 +469,7 @@ int wl1271_scan_sched_scan_config(struct wl1271 *wl,
 		cfg->ssid_len = 0;
 	}
 
-	total_channels = wl1271_scan_sched_scan_channels(wl, req, cfg);
-	if (total_channels == 0) {
+	if (!wl1271_scan_sched_scan_channels(wl, req, cfg)) {
 		wl1271_error("scan channel list is empty");
 		ret = -EINVAL;
 		goto out;

drivers/net/wireless/wl12xx/scan.h

@@ -112,18 +112,13 @@ struct wl1271_cmd_trigger_scan_to {
 	__le32 timeout;
 } __packed;
 
-#define MAX_CHANNELS_ALL_BANDS 41
+#define MAX_CHANNELS_2GHZ	14
+#define MAX_CHANNELS_5GHZ	23
+#define MAX_CHANNELS_4GHZ	4
+
 #define SCAN_MAX_CYCLE_INTERVALS 16
 #define SCAN_MAX_BANDS 3
 
-enum {
-	SCAN_CHANNEL_TYPE_2GHZ_PASSIVE,
-	SCAN_CHANNEL_TYPE_2GHZ_ACTIVE,
-	SCAN_CHANNEL_TYPE_5GHZ_PASSIVE,
-	SCAN_CHANNEL_TYPE_5GHZ_ACTIVE,
-	SCAN_CHANNEL_TYPE_5GHZ_DFS,
-};
-
 enum {
 	SCAN_SSID_FILTER_ANY      = 0,
 	SCAN_SSID_FILTER_SPECIFIC = 1,
@@ -182,7 +177,9 @@ struct wl1271_cmd_sched_scan_config {
 
 	u8 padding[3];
 
-	struct conn_scan_ch_params channels[MAX_CHANNELS_ALL_BANDS];
+	struct conn_scan_ch_params channels_2[MAX_CHANNELS_2GHZ];
+	struct conn_scan_ch_params channels_5[MAX_CHANNELS_5GHZ];
+	struct conn_scan_ch_params channels_4[MAX_CHANNELS_4GHZ];
 } __packed;